Abstract

Measuring intracranial pressure (ICP) is necessary for the treatment of severe head injury but measurement systems are highly invasive and introduce risk of infection and complications. We developed a non-invasive alternative for quantifying ICP using measurements of cerebral blood flow (CBF) by diffuse correlation spectroscopy. The recorded cardiac pulsation waveform in CBF undergoes morphological changes in response to ICP changes. We used the pulse shape to train a randomized regression forest to estimate the underlying ICP and demonstrate in five non-human primates that DCS-based estimation can explain over 90% of the variance in invasively measured ICP.

© 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

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References

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    [Crossref]
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    [Crossref]
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    [Crossref]
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    [Crossref]

2020 (1)

C. Robba, D. Cardim, M. Czosnyka, F. Abecasis, S. Pezzato, S. Buratti, A. Moscatelli, C. Sortica, F. Racca, P. Pelosi, and F. Rasulo, “Ultrasound non-invasive intracranial pressure assessment in paediatric neurocritical care: a pilot study,” Child. Nerv. Syst. 36(1), 117–124 (2020).
[Crossref]

2019 (3)

A. Fanelli, F. W. Vonberg, K. L. LaRovere, B. K. Walsh, E. R. Smith, S. Robinson, R. C. Tasker, and T. Heldt, “Fully automated, real-time, calibration-free, continuous noninvasive estimation of intracranial pressure in children,” J. Neurosurg. Pediatr. 24(5), 509–519 (2019).
[Crossref]

J. B. Fischer, A. Ghouse, S. Tagliabue, F. Maruccia, R. Zucca, U. M. Weigel, J. Sahuquillo, M. A. Poca, and T. Durduran, “Derivation of an intracranial pressure index by the waveform analysis of cerebral blood flow measured non-invasively using fast diffuse correlation spectroscopy. The Niels Lassen Award Session and Oral Sessions,” J. Cereb. Blood Flow Metab. 39(1_suppl), 1–123 (2019).
[Crossref]

A. Ruesch, S. Schmitt, J. Yang, M. A. Smith, and J. M. Kainerstorfer, “Fluctuations in intracranial pressure can be estimated non-invasively using near-infrared spectroscopy in non-human primates,” J. Cereb. Blood Flow Metab. 37, 0271678X1989135 (2019).
[Crossref]

2017 (3)

Z. Czosnyka and M. Czosnyka, “Long-term monitoring of intracranial pressure in normal pressure hydrocephalus and other CSF disorders,” Acta Neurochir. 159(10), 1979–1980 (2017).
[Crossref]

E. Needham, C. McFadyen, V. Newcombe, A. Synnot, M. Czosnyka, and D. Menon, “Cerebral Perfusion Pressure Targets Individualized to Pressure-Reactivity Index in Moderate to Severe Traumatic Brain Injury: A Systematic Review,” J. Neurotrauma 34(5), 963–970 (2017).
[Crossref]

X. Zhang, J. E. Medow, B. J. Iskandar, F. Wang, M. Shokoueinejad, J. Koueik, and J. G. Webster, “Invasive and noninvasive means of measuring intracranial pressure: A review,” Physiol. Meas. 38(8), R143–R182 (2017).
[Crossref]

2016 (4)

M. H. Wilson, “Monro-Kellie 2.0: The dynamic vascular and venous pathophysiological components of intracranial pressure,” J. Cereb. Blood Flow Metab. 36(8), 1338–1350 (2016).
[Crossref]

K. T. Kahle, A. V. Kulkarni, D. D. Limbrick, B. C. Warf, L. G. Campos, R. Menegatti, and L. M. Vedolin, “Hydrocephalus in children,” Lancet 387(10020), 788–799 (2016).
[Crossref]

D. Cardim, C. Robba, M. Bohdanowicz, J. Donnelly, B. Cabella, X. Liu, M. Cabeleira, P. Smielewski, B. Schmidt, and M. Czosnyka, “Non-invasive Monitoring of Intracranial Pressure Using Transcranial Doppler Ultrasonography: Is It Possible?” Neurocrit. Care 25(3), 473–491 (2016).
[Crossref]

W. Xu, P. Gerety, T. Aleman, J. Swanson, and J. Taylor, “Noninvasive methods of detecting increased intracranial pressure,” Childs Nerv Syst. 32(8), 1371–1386 (2016).
[Crossref]

2015 (4)

G. V. Varsos, A. G. Kolias, P. Smielewski, K. M. Brady, V. G. Varsos, P. J. Hutchinson, J. D. Pickard, and M. Czosnyka, “A noninvasive estimation of cerebral perfusion pressure using critical closing pressure,” J. Neurosurg. 123(3), 638–648 (2015).
[Crossref]

D. J. Davies, Z. Su, M. T. Clancy, S. J. E. E. Lucas, H. Dehghani, A. Logan, and A. Belli, “Near-Infrared Spectroscopy in the Monitoring of Adult Traumatic Brain Injury: A Review,” J. Neurotrauma 32(13), 933–941 (2015).
[Crossref]

F. Güiza, B. Depreitere, I. Piper, G. Citerio, I. Chambers, P. A. Jones, T. Y. M. Lo, P. Enblad, P. Nillson, B. Feyen, P. Jorens, A. Maas, M. U. Schuhmann, R. Donald, L. Moss, G. Van den Berghe, and G. Meyfroidt, “Visualizing the pressure and time burden of intracranial hypertension in adult and paediatric traumatic brain injury,” Intensive Care Med. 41(6), 1067–1076 (2015).
[Crossref]

U. Kawoos, R. M. McCarron, C. R. Auker, and M. Chavko, “Advances in intracranial pressure monitoring and its significance in managing traumatic brain injury,” Int. J. Mol. Sci. 16(12), 28979–28997 (2015).
[Crossref]

2014 (3)

C. Hawthorne and I. Piper, “Monitoring of intracranial pressure in patients with traumatic brain injury,” Front. Neurol. 5, 1–16 (2014).
[Crossref]

T. Durduran and A. G. Yodh, “Diffuse correlation spectroscopy for non-invasive, micro-vascular cerebral blood flow measurement,” NeuroImage 85, 51–63 (2014).
[Crossref]

S. Wager, T. Hastie, and B. Efron, “Confidence Intervals for Random Forests: The Jackknife and the Infinitesimal Jackknife,” J. Mach. Learn. Res. 15, 1625–1651 (2014).

2013 (1)

A. Amini, H. Kariman, A. Arhami Dolatabadi, H. R. Hatamabadi, H. Derakhshanfar, B. Mansouri, S. Safari, and R. Eqtesadi, “Use of the sonographic diameter of optic nerve sheath to estimate intracranial pressure,” Am. J. Emerg. Med. 31(1), 236–239 (2013).
[Crossref]

2012 (2)

R. A. Weerakkody, M. Czosnyka, C. Zweifel, G. Castellani, P. Smielewski, K. Brady, J. D. Pickard, and Z. Czosnyka, “Near Infrared Spectroscopy as Possible Non-invasive Monitor of Slow Vasogenic ICP Waves,” Acta Neurochir. Suppl. 114, 181–185 (2012).
[Crossref]

P. H. Raboel, J. Bartek, M. Andresen, B. M. Bellander, B. Romner, and J. F. Stover, “Intracranial pressure monitoring: Invasive versus non-invasive methods-A review,” Crit. Care Res. Pract. 2012, 1–14 (2012).
[Crossref]

2011 (2)

J. B. Rosenberg, A. L. Shiloh, R. H. Savel, and L. A. Eisen, “Non-invasive methods of estimating intracranial pressure,” Neurocrit. Care 15(3), 599–608 (2011).
[Crossref]

F. Pedregosa, G. Varoquaux, A. Gramfort, V. Michel, B. Thirion, and O. Grisel, and others, “Scikit-learn: Machine Learning in Python,” J. Mach. Learn. Res. 12, 2825–2830 (2011).

2010 (2)

C. Zweifel, G. Castellani, M. Czosnyka, E. Carrera, K. M. Brady, P. J. Kirkpatrick, J. D. Pickard, and P. Smielewski, “Continuous assessment of cerebral autoregulation with near-infrared spectroscopy in adults after subarachnoid hemorrhage,” Stroke 41(9), 1963–1968 (2010).
[Crossref]

E. Carrera, D.-J. Kim, G. Castellani, C. Zweifel, Z. Czosnyka, M. Kasprowicz, P. Smielewski, J. D. Pickard, and M. Czosnyka, “What Shapes Pulse Amplitude of Intracranial Pressure?” J. Neurotrauma 27(2), 317–324 (2010).
[Crossref]

2009 (3)

A. Dagal and A. M. Lam, “Cerebral autoregulation and anesthesia,” Curr. Opin. Anaesthesiol. 22(5), 547–552 (2009).
[Crossref]

X. Hu and M. Bergsneider, “Morphological clustering and analysis of intracranial pressure pulses (mocaip),” IEEE Trans. Biomed. Eng. 56(3), 696–705 (2009).
[Crossref]

A. A. Figaji, E. Zwane, A. G. Fieggen, P. Siesjo, and J. C. Peter, “Transcranial Doppler pulsatility index is not a reliable indicator of intracranial pressure in children with severe traumatic brain injury,” Surg. Neurol. 72(4), 389–394 (2009).
[Crossref]

2008 (1)

M. Smith, “Monitoring intracranial pressure in traumatic brain injury,” Anesth. Analg. 106(1), 240–248 (2008).
[Crossref]

2007 (3)

P. M. Lewis, P. Smielewski, J. D. Pickard, and M. Czosnyka, “Dynamic cerebral autoregulation: Should intracranial pressure be taken into account?” Acta Neurochir. 149(6), 549–555 (2007).
[Crossref]

S. L. Bratton, R. M. Chestnut, J. Ghajar, F. F. M. Hammond, O. A. Harris, R. Hartl, G. T. Manley, A. Nemecek, D. W. Newell, G. U. Y. Rosenthal, J. Schouten, L. Shutter, S. D. Timmons, J. S. Ullman, W. Videtta, J. E. Wilberger, and D. W. Wright, “VII . Intracranial Pressure Monitoring Technology,” J. Neurotrauma 24(supplement 1), S-45–S-54 (2007).
[Crossref]

N. Lenfeldt, L. O. D. Koskinen, A. T. Bergenheim, J. Malm, and A. Eklund, “CSF pressure assessed by lumbar puncture agrees with intracranial pressure,” Neurology 68(2), 155–158 (2007).
[Crossref]

2006 (1)

M. Balestreri, M. Czosnyka, P. Hutchinson, L. A. Steiner, M. Hiler, P. Smielewski, and J. D. Pickard, “Impact of Intracranial Pressure and Cerebral Perfusion Pressure on Severe Disability and Mortality After Head Injury,” Neurocrit. Care 4(1), 008–013 (2006).
[Crossref]

2005 (2)

M. Balestreri, M. Czosnyka, L. A. Steiner, M. Hiler, E. A. Schmidt, B. Matta, D. Menon, P. Hutchinson, and J. D. Pickard, “Association between outcome, cerebral pressure reactivity and slow ICP waves following head injury,” Acta Neurochir. Suppl. 95, 25–28 (2005).
[Crossref]

A. R. Edouard, E. Vanhille, S. Le Moigno, D. Benhamou, and J.-X. Mazoit, “Non-invasive assessment of cerebral perfusion pressure in brain injured patients with moderate intracranial hypertension,” Br. J. Anaesth. 94(2), 216–221 (2005).
[Crossref]

2004 (1)

M. Czosnyka and J. D. Pickard, “Monitoring and interpretation of intracranial pressure,” J. Neurol., Neurosurg. Psychiatry 75(6), 813–821 (2004).
[Crossref]

2002 (1)

V. Petkus, A. Ragauskas, and R. Jurkonis, “Investigation of intracranial media ultrasonic monitoring model,” Ultrasonics 40(1-8), 829–833 (2002).
[Crossref]

2001 (1)

L. E. O. Breiman, “Random Forests,” Mach. Learn. 45(1), 5–32 (2001).
[Crossref]

1997 (1)

D. A. Boas and A. G. Yodh, “Spatially varying dynamical properties of turbid media probed with diffusing temporal light correlation,” J. Opt. Soc. Am. 14(1), 192–215 (1997).
[Crossref]

1995 (1)

S. Fantini, M.-A. Franceschini, J. S. Maier, S. A. Walker, B. B. Barbieri, and E. Gratton, “Frequency-domain multichannel optical detector for noninvasive tissue spectroscopy and oximetry,” Opt. Eng. 34(1), 32 (1995).
[Crossref]

1990 (1)

A. Reid, R. J. Marchbanks, D. M. Burge, A. M. Martin, D. E. Bateman, J. D. Pickard, and A. P. Brightwell, “The relationship between intracranial pressure and tympanic membrane displacement,” Br. J. Audiol. 24(2), 123–129 (1990).
[Crossref]

1976 (1)

N. A. Lassen and M. S. Christensen, “Physiology of cerebral blood flow,” Br. J. Anaesth 48(8), 719–734 (1976).
[Crossref]

Abecasis, F.

C. Robba, D. Cardim, M. Czosnyka, F. Abecasis, S. Pezzato, S. Buratti, A. Moscatelli, C. Sortica, F. Racca, P. Pelosi, and F. Rasulo, “Ultrasound non-invasive intracranial pressure assessment in paediatric neurocritical care: a pilot study,” Child. Nerv. Syst. 36(1), 117–124 (2020).
[Crossref]

Adelson, P. D.

P. M. Kochanek, R. C. Tasker, N. Carney, A. M. Totten, P. D. Adelson, N. R. Selden, C. Davis-O’Reilly, E. L. Hart, M. J. Bell, S. L. Bratton, G. A. Grant, N. Kissoon, K. E. Reuter-Rice, M. S. Vavilala, and M. S. Wainwright, Guidelines for the Management of Pediatric Severe Traumatic Brain Injury, Third Edition: Update of the Brain Trauma Foundation Guidelines, 20(3S Suppl 1) (2019).

Aleman, T.

W. Xu, P. Gerety, T. Aleman, J. Swanson, and J. Taylor, “Noninvasive methods of detecting increased intracranial pressure,” Childs Nerv Syst. 32(8), 1371–1386 (2016).
[Crossref]

Amini, A.

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F. Güiza, B. Depreitere, I. Piper, G. Citerio, I. Chambers, P. A. Jones, T. Y. M. Lo, P. Enblad, P. Nillson, B. Feyen, P. Jorens, A. Maas, M. U. Schuhmann, R. Donald, L. Moss, G. Van den Berghe, and G. Meyfroidt, “Visualizing the pressure and time burden of intracranial hypertension in adult and paediatric traumatic brain injury,” Intensive Care Med. 41(6), 1067–1076 (2015).
[Crossref]

Needham, E.

E. Needham, C. McFadyen, V. Newcombe, A. Synnot, M. Czosnyka, and D. Menon, “Cerebral Perfusion Pressure Targets Individualized to Pressure-Reactivity Index in Moderate to Severe Traumatic Brain Injury: A Systematic Review,” J. Neurotrauma 34(5), 963–970 (2017).
[Crossref]

Nemecek, A.

S. L. Bratton, R. M. Chestnut, J. Ghajar, F. F. M. Hammond, O. A. Harris, R. Hartl, G. T. Manley, A. Nemecek, D. W. Newell, G. U. Y. Rosenthal, J. Schouten, L. Shutter, S. D. Timmons, J. S. Ullman, W. Videtta, J. E. Wilberger, and D. W. Wright, “VII . Intracranial Pressure Monitoring Technology,” J. Neurotrauma 24(supplement 1), S-45–S-54 (2007).
[Crossref]

Newcombe, V.

E. Needham, C. McFadyen, V. Newcombe, A. Synnot, M. Czosnyka, and D. Menon, “Cerebral Perfusion Pressure Targets Individualized to Pressure-Reactivity Index in Moderate to Severe Traumatic Brain Injury: A Systematic Review,” J. Neurotrauma 34(5), 963–970 (2017).
[Crossref]

Newell, D. W.

S. L. Bratton, R. M. Chestnut, J. Ghajar, F. F. M. Hammond, O. A. Harris, R. Hartl, G. T. Manley, A. Nemecek, D. W. Newell, G. U. Y. Rosenthal, J. Schouten, L. Shutter, S. D. Timmons, J. S. Ullman, W. Videtta, J. E. Wilberger, and D. W. Wright, “VII . Intracranial Pressure Monitoring Technology,” J. Neurotrauma 24(supplement 1), S-45–S-54 (2007).
[Crossref]

Nillson, P.

F. Güiza, B. Depreitere, I. Piper, G. Citerio, I. Chambers, P. A. Jones, T. Y. M. Lo, P. Enblad, P. Nillson, B. Feyen, P. Jorens, A. Maas, M. U. Schuhmann, R. Donald, L. Moss, G. Van den Berghe, and G. Meyfroidt, “Visualizing the pressure and time burden of intracranial hypertension in adult and paediatric traumatic brain injury,” Intensive Care Med. 41(6), 1067–1076 (2015).
[Crossref]

Pedregosa, F.

F. Pedregosa, G. Varoquaux, A. Gramfort, V. Michel, B. Thirion, and O. Grisel, and others, “Scikit-learn: Machine Learning in Python,” J. Mach. Learn. Res. 12, 2825–2830 (2011).

Pelosi, P.

C. Robba, D. Cardim, M. Czosnyka, F. Abecasis, S. Pezzato, S. Buratti, A. Moscatelli, C. Sortica, F. Racca, P. Pelosi, and F. Rasulo, “Ultrasound non-invasive intracranial pressure assessment in paediatric neurocritical care: a pilot study,” Child. Nerv. Syst. 36(1), 117–124 (2020).
[Crossref]

Peter, J. C.

A. A. Figaji, E. Zwane, A. G. Fieggen, P. Siesjo, and J. C. Peter, “Transcranial Doppler pulsatility index is not a reliable indicator of intracranial pressure in children with severe traumatic brain injury,” Surg. Neurol. 72(4), 389–394 (2009).
[Crossref]

Petkus, V.

V. Petkus, A. Ragauskas, and R. Jurkonis, “Investigation of intracranial media ultrasonic monitoring model,” Ultrasonics 40(1-8), 829–833 (2002).
[Crossref]

Pezzato, S.

C. Robba, D. Cardim, M. Czosnyka, F. Abecasis, S. Pezzato, S. Buratti, A. Moscatelli, C. Sortica, F. Racca, P. Pelosi, and F. Rasulo, “Ultrasound non-invasive intracranial pressure assessment in paediatric neurocritical care: a pilot study,” Child. Nerv. Syst. 36(1), 117–124 (2020).
[Crossref]

Pickard, J. D.

G. V. Varsos, A. G. Kolias, P. Smielewski, K. M. Brady, V. G. Varsos, P. J. Hutchinson, J. D. Pickard, and M. Czosnyka, “A noninvasive estimation of cerebral perfusion pressure using critical closing pressure,” J. Neurosurg. 123(3), 638–648 (2015).
[Crossref]

R. A. Weerakkody, M. Czosnyka, C. Zweifel, G. Castellani, P. Smielewski, K. Brady, J. D. Pickard, and Z. Czosnyka, “Near Infrared Spectroscopy as Possible Non-invasive Monitor of Slow Vasogenic ICP Waves,” Acta Neurochir. Suppl. 114, 181–185 (2012).
[Crossref]

E. Carrera, D.-J. Kim, G. Castellani, C. Zweifel, Z. Czosnyka, M. Kasprowicz, P. Smielewski, J. D. Pickard, and M. Czosnyka, “What Shapes Pulse Amplitude of Intracranial Pressure?” J. Neurotrauma 27(2), 317–324 (2010).
[Crossref]

C. Zweifel, G. Castellani, M. Czosnyka, E. Carrera, K. M. Brady, P. J. Kirkpatrick, J. D. Pickard, and P. Smielewski, “Continuous assessment of cerebral autoregulation with near-infrared spectroscopy in adults after subarachnoid hemorrhage,” Stroke 41(9), 1963–1968 (2010).
[Crossref]

P. M. Lewis, P. Smielewski, J. D. Pickard, and M. Czosnyka, “Dynamic cerebral autoregulation: Should intracranial pressure be taken into account?” Acta Neurochir. 149(6), 549–555 (2007).
[Crossref]

M. Balestreri, M. Czosnyka, P. Hutchinson, L. A. Steiner, M. Hiler, P. Smielewski, and J. D. Pickard, “Impact of Intracranial Pressure and Cerebral Perfusion Pressure on Severe Disability and Mortality After Head Injury,” Neurocrit. Care 4(1), 008–013 (2006).
[Crossref]

M. Balestreri, M. Czosnyka, L. A. Steiner, M. Hiler, E. A. Schmidt, B. Matta, D. Menon, P. Hutchinson, and J. D. Pickard, “Association between outcome, cerebral pressure reactivity and slow ICP waves following head injury,” Acta Neurochir. Suppl. 95, 25–28 (2005).
[Crossref]

M. Czosnyka and J. D. Pickard, “Monitoring and interpretation of intracranial pressure,” J. Neurol., Neurosurg. Psychiatry 75(6), 813–821 (2004).
[Crossref]

A. Reid, R. J. Marchbanks, D. M. Burge, A. M. Martin, D. E. Bateman, J. D. Pickard, and A. P. Brightwell, “The relationship between intracranial pressure and tympanic membrane displacement,” Br. J. Audiol. 24(2), 123–129 (1990).
[Crossref]

Piper, I.

F. Güiza, B. Depreitere, I. Piper, G. Citerio, I. Chambers, P. A. Jones, T. Y. M. Lo, P. Enblad, P. Nillson, B. Feyen, P. Jorens, A. Maas, M. U. Schuhmann, R. Donald, L. Moss, G. Van den Berghe, and G. Meyfroidt, “Visualizing the pressure and time burden of intracranial hypertension in adult and paediatric traumatic brain injury,” Intensive Care Med. 41(6), 1067–1076 (2015).
[Crossref]

C. Hawthorne and I. Piper, “Monitoring of intracranial pressure in patients with traumatic brain injury,” Front. Neurol. 5, 1–16 (2014).
[Crossref]

Poca, M. A.

J. B. Fischer, A. Ghouse, S. Tagliabue, F. Maruccia, R. Zucca, U. M. Weigel, J. Sahuquillo, M. A. Poca, and T. Durduran, “Derivation of an intracranial pressure index by the waveform analysis of cerebral blood flow measured non-invasively using fast diffuse correlation spectroscopy. The Niels Lassen Award Session and Oral Sessions,” J. Cereb. Blood Flow Metab. 39(1_suppl), 1–123 (2019).
[Crossref]

Raboel, P. H.

P. H. Raboel, J. Bartek, M. Andresen, B. M. Bellander, B. Romner, and J. F. Stover, “Intracranial pressure monitoring: Invasive versus non-invasive methods-A review,” Crit. Care Res. Pract. 2012, 1–14 (2012).
[Crossref]

Racca, F.

C. Robba, D. Cardim, M. Czosnyka, F. Abecasis, S. Pezzato, S. Buratti, A. Moscatelli, C. Sortica, F. Racca, P. Pelosi, and F. Rasulo, “Ultrasound non-invasive intracranial pressure assessment in paediatric neurocritical care: a pilot study,” Child. Nerv. Syst. 36(1), 117–124 (2020).
[Crossref]

Ragauskas, A.

V. Petkus, A. Ragauskas, and R. Jurkonis, “Investigation of intracranial media ultrasonic monitoring model,” Ultrasonics 40(1-8), 829–833 (2002).
[Crossref]

Rasulo, F.

C. Robba, D. Cardim, M. Czosnyka, F. Abecasis, S. Pezzato, S. Buratti, A. Moscatelli, C. Sortica, F. Racca, P. Pelosi, and F. Rasulo, “Ultrasound non-invasive intracranial pressure assessment in paediatric neurocritical care: a pilot study,” Child. Nerv. Syst. 36(1), 117–124 (2020).
[Crossref]

Reid, A.

A. Reid, R. J. Marchbanks, D. M. Burge, A. M. Martin, D. E. Bateman, J. D. Pickard, and A. P. Brightwell, “The relationship between intracranial pressure and tympanic membrane displacement,” Br. J. Audiol. 24(2), 123–129 (1990).
[Crossref]

Reuter-Rice, K. E.

P. M. Kochanek, R. C. Tasker, N. Carney, A. M. Totten, P. D. Adelson, N. R. Selden, C. Davis-O’Reilly, E. L. Hart, M. J. Bell, S. L. Bratton, G. A. Grant, N. Kissoon, K. E. Reuter-Rice, M. S. Vavilala, and M. S. Wainwright, Guidelines for the Management of Pediatric Severe Traumatic Brain Injury, Third Edition: Update of the Brain Trauma Foundation Guidelines, 20(3S Suppl 1) (2019).

Robba, C.

C. Robba, D. Cardim, M. Czosnyka, F. Abecasis, S. Pezzato, S. Buratti, A. Moscatelli, C. Sortica, F. Racca, P. Pelosi, and F. Rasulo, “Ultrasound non-invasive intracranial pressure assessment in paediatric neurocritical care: a pilot study,” Child. Nerv. Syst. 36(1), 117–124 (2020).
[Crossref]

D. Cardim, C. Robba, M. Bohdanowicz, J. Donnelly, B. Cabella, X. Liu, M. Cabeleira, P. Smielewski, B. Schmidt, and M. Czosnyka, “Non-invasive Monitoring of Intracranial Pressure Using Transcranial Doppler Ultrasonography: Is It Possible?” Neurocrit. Care 25(3), 473–491 (2016).
[Crossref]

Robinson, S.

A. Fanelli, F. W. Vonberg, K. L. LaRovere, B. K. Walsh, E. R. Smith, S. Robinson, R. C. Tasker, and T. Heldt, “Fully automated, real-time, calibration-free, continuous noninvasive estimation of intracranial pressure in children,” J. Neurosurg. Pediatr. 24(5), 509–519 (2019).
[Crossref]

Romner, B.

P. H. Raboel, J. Bartek, M. Andresen, B. M. Bellander, B. Romner, and J. F. Stover, “Intracranial pressure monitoring: Invasive versus non-invasive methods-A review,” Crit. Care Res. Pract. 2012, 1–14 (2012).
[Crossref]

Rosenberg, J. B.

J. B. Rosenberg, A. L. Shiloh, R. H. Savel, and L. A. Eisen, “Non-invasive methods of estimating intracranial pressure,” Neurocrit. Care 15(3), 599–608 (2011).
[Crossref]

Rosenthal, G. U. Y.

S. L. Bratton, R. M. Chestnut, J. Ghajar, F. F. M. Hammond, O. A. Harris, R. Hartl, G. T. Manley, A. Nemecek, D. W. Newell, G. U. Y. Rosenthal, J. Schouten, L. Shutter, S. D. Timmons, J. S. Ullman, W. Videtta, J. E. Wilberger, and D. W. Wright, “VII . Intracranial Pressure Monitoring Technology,” J. Neurotrauma 24(supplement 1), S-45–S-54 (2007).
[Crossref]

Ruesch, A.

A. Ruesch, S. Schmitt, J. Yang, M. A. Smith, and J. M. Kainerstorfer, “Fluctuations in intracranial pressure can be estimated non-invasively using near-infrared spectroscopy in non-human primates,” J. Cereb. Blood Flow Metab. 37, 0271678X1989135 (2019).
[Crossref]

Safari, S.

A. Amini, H. Kariman, A. Arhami Dolatabadi, H. R. Hatamabadi, H. Derakhshanfar, B. Mansouri, S. Safari, and R. Eqtesadi, “Use of the sonographic diameter of optic nerve sheath to estimate intracranial pressure,” Am. J. Emerg. Med. 31(1), 236–239 (2013).
[Crossref]

Sahuquillo, J.

J. B. Fischer, A. Ghouse, S. Tagliabue, F. Maruccia, R. Zucca, U. M. Weigel, J. Sahuquillo, M. A. Poca, and T. Durduran, “Derivation of an intracranial pressure index by the waveform analysis of cerebral blood flow measured non-invasively using fast diffuse correlation spectroscopy. The Niels Lassen Award Session and Oral Sessions,” J. Cereb. Blood Flow Metab. 39(1_suppl), 1–123 (2019).
[Crossref]

Savel, R. H.

J. B. Rosenberg, A. L. Shiloh, R. H. Savel, and L. A. Eisen, “Non-invasive methods of estimating intracranial pressure,” Neurocrit. Care 15(3), 599–608 (2011).
[Crossref]

Scharf, R.

M. Swoboda, M. G. Hochman, F. J. Fritz, J. S. Gopagoni, T. W. Sundeep, R. Scharf, Banerjee, and Tiley, “Non-invasive intracranial pressure sensor,” (2013).

Schmidt, B.

D. Cardim, C. Robba, M. Bohdanowicz, J. Donnelly, B. Cabella, X. Liu, M. Cabeleira, P. Smielewski, B. Schmidt, and M. Czosnyka, “Non-invasive Monitoring of Intracranial Pressure Using Transcranial Doppler Ultrasonography: Is It Possible?” Neurocrit. Care 25(3), 473–491 (2016).
[Crossref]

Schmidt, E. A.

M. Balestreri, M. Czosnyka, L. A. Steiner, M. Hiler, E. A. Schmidt, B. Matta, D. Menon, P. Hutchinson, and J. D. Pickard, “Association between outcome, cerebral pressure reactivity and slow ICP waves following head injury,” Acta Neurochir. Suppl. 95, 25–28 (2005).
[Crossref]

Schmitt, S.

A. Ruesch, S. Schmitt, J. Yang, M. A. Smith, and J. M. Kainerstorfer, “Fluctuations in intracranial pressure can be estimated non-invasively using near-infrared spectroscopy in non-human primates,” J. Cereb. Blood Flow Metab. 37, 0271678X1989135 (2019).
[Crossref]

Schouten, J.

S. L. Bratton, R. M. Chestnut, J. Ghajar, F. F. M. Hammond, O. A. Harris, R. Hartl, G. T. Manley, A. Nemecek, D. W. Newell, G. U. Y. Rosenthal, J. Schouten, L. Shutter, S. D. Timmons, J. S. Ullman, W. Videtta, J. E. Wilberger, and D. W. Wright, “VII . Intracranial Pressure Monitoring Technology,” J. Neurotrauma 24(supplement 1), S-45–S-54 (2007).
[Crossref]

Schuhmann, M. U.

F. Güiza, B. Depreitere, I. Piper, G. Citerio, I. Chambers, P. A. Jones, T. Y. M. Lo, P. Enblad, P. Nillson, B. Feyen, P. Jorens, A. Maas, M. U. Schuhmann, R. Donald, L. Moss, G. Van den Berghe, and G. Meyfroidt, “Visualizing the pressure and time burden of intracranial hypertension in adult and paediatric traumatic brain injury,” Intensive Care Med. 41(6), 1067–1076 (2015).
[Crossref]

Selden, N. R.

P. M. Kochanek, R. C. Tasker, N. Carney, A. M. Totten, P. D. Adelson, N. R. Selden, C. Davis-O’Reilly, E. L. Hart, M. J. Bell, S. L. Bratton, G. A. Grant, N. Kissoon, K. E. Reuter-Rice, M. S. Vavilala, and M. S. Wainwright, Guidelines for the Management of Pediatric Severe Traumatic Brain Injury, Third Edition: Update of the Brain Trauma Foundation Guidelines, 20(3S Suppl 1) (2019).

Shiloh, A. L.

J. B. Rosenberg, A. L. Shiloh, R. H. Savel, and L. A. Eisen, “Non-invasive methods of estimating intracranial pressure,” Neurocrit. Care 15(3), 599–608 (2011).
[Crossref]

Shokoueinejad, M.

X. Zhang, J. E. Medow, B. J. Iskandar, F. Wang, M. Shokoueinejad, J. Koueik, and J. G. Webster, “Invasive and noninvasive means of measuring intracranial pressure: A review,” Physiol. Meas. 38(8), R143–R182 (2017).
[Crossref]

Shotton, J.

A. Criminisi and J. Shotton, Decision Forests for Computer Vision and Medical Image Analysis (Springer, 2013).

Shutter, L.

S. L. Bratton, R. M. Chestnut, J. Ghajar, F. F. M. Hammond, O. A. Harris, R. Hartl, G. T. Manley, A. Nemecek, D. W. Newell, G. U. Y. Rosenthal, J. Schouten, L. Shutter, S. D. Timmons, J. S. Ullman, W. Videtta, J. E. Wilberger, and D. W. Wright, “VII . Intracranial Pressure Monitoring Technology,” J. Neurotrauma 24(supplement 1), S-45–S-54 (2007).
[Crossref]

Siesjo, P.

A. A. Figaji, E. Zwane, A. G. Fieggen, P. Siesjo, and J. C. Peter, “Transcranial Doppler pulsatility index is not a reliable indicator of intracranial pressure in children with severe traumatic brain injury,” Surg. Neurol. 72(4), 389–394 (2009).
[Crossref]

Smielewski, P.

D. Cardim, C. Robba, M. Bohdanowicz, J. Donnelly, B. Cabella, X. Liu, M. Cabeleira, P. Smielewski, B. Schmidt, and M. Czosnyka, “Non-invasive Monitoring of Intracranial Pressure Using Transcranial Doppler Ultrasonography: Is It Possible?” Neurocrit. Care 25(3), 473–491 (2016).
[Crossref]

G. V. Varsos, A. G. Kolias, P. Smielewski, K. M. Brady, V. G. Varsos, P. J. Hutchinson, J. D. Pickard, and M. Czosnyka, “A noninvasive estimation of cerebral perfusion pressure using critical closing pressure,” J. Neurosurg. 123(3), 638–648 (2015).
[Crossref]

R. A. Weerakkody, M. Czosnyka, C. Zweifel, G. Castellani, P. Smielewski, K. Brady, J. D. Pickard, and Z. Czosnyka, “Near Infrared Spectroscopy as Possible Non-invasive Monitor of Slow Vasogenic ICP Waves,” Acta Neurochir. Suppl. 114, 181–185 (2012).
[Crossref]

E. Carrera, D.-J. Kim, G. Castellani, C. Zweifel, Z. Czosnyka, M. Kasprowicz, P. Smielewski, J. D. Pickard, and M. Czosnyka, “What Shapes Pulse Amplitude of Intracranial Pressure?” J. Neurotrauma 27(2), 317–324 (2010).
[Crossref]

C. Zweifel, G. Castellani, M. Czosnyka, E. Carrera, K. M. Brady, P. J. Kirkpatrick, J. D. Pickard, and P. Smielewski, “Continuous assessment of cerebral autoregulation with near-infrared spectroscopy in adults after subarachnoid hemorrhage,” Stroke 41(9), 1963–1968 (2010).
[Crossref]

P. M. Lewis, P. Smielewski, J. D. Pickard, and M. Czosnyka, “Dynamic cerebral autoregulation: Should intracranial pressure be taken into account?” Acta Neurochir. 149(6), 549–555 (2007).
[Crossref]

M. Balestreri, M. Czosnyka, P. Hutchinson, L. A. Steiner, M. Hiler, P. Smielewski, and J. D. Pickard, “Impact of Intracranial Pressure and Cerebral Perfusion Pressure on Severe Disability and Mortality After Head Injury,” Neurocrit. Care 4(1), 008–013 (2006).
[Crossref]

Smith, E. R.

A. Fanelli, F. W. Vonberg, K. L. LaRovere, B. K. Walsh, E. R. Smith, S. Robinson, R. C. Tasker, and T. Heldt, “Fully automated, real-time, calibration-free, continuous noninvasive estimation of intracranial pressure in children,” J. Neurosurg. Pediatr. 24(5), 509–519 (2019).
[Crossref]

Smith, M.

M. Smith, “Monitoring intracranial pressure in traumatic brain injury,” Anesth. Analg. 106(1), 240–248 (2008).
[Crossref]

Smith, M. A.

A. Ruesch, S. Schmitt, J. Yang, M. A. Smith, and J. M. Kainerstorfer, “Fluctuations in intracranial pressure can be estimated non-invasively using near-infrared spectroscopy in non-human primates,” J. Cereb. Blood Flow Metab. 37, 0271678X1989135 (2019).
[Crossref]

Sortica, C.

C. Robba, D. Cardim, M. Czosnyka, F. Abecasis, S. Pezzato, S. Buratti, A. Moscatelli, C. Sortica, F. Racca, P. Pelosi, and F. Rasulo, “Ultrasound non-invasive intracranial pressure assessment in paediatric neurocritical care: a pilot study,” Child. Nerv. Syst. 36(1), 117–124 (2020).
[Crossref]

Steiner, L. A.

M. Balestreri, M. Czosnyka, P. Hutchinson, L. A. Steiner, M. Hiler, P. Smielewski, and J. D. Pickard, “Impact of Intracranial Pressure and Cerebral Perfusion Pressure on Severe Disability and Mortality After Head Injury,” Neurocrit. Care 4(1), 008–013 (2006).
[Crossref]

M. Balestreri, M. Czosnyka, L. A. Steiner, M. Hiler, E. A. Schmidt, B. Matta, D. Menon, P. Hutchinson, and J. D. Pickard, “Association between outcome, cerebral pressure reactivity and slow ICP waves following head injury,” Acta Neurochir. Suppl. 95, 25–28 (2005).
[Crossref]

Stover, J. F.

P. H. Raboel, J. Bartek, M. Andresen, B. M. Bellander, B. Romner, and J. F. Stover, “Intracranial pressure monitoring: Invasive versus non-invasive methods-A review,” Crit. Care Res. Pract. 2012, 1–14 (2012).
[Crossref]

Su, Z.

D. J. Davies, Z. Su, M. T. Clancy, S. J. E. E. Lucas, H. Dehghani, A. Logan, and A. Belli, “Near-Infrared Spectroscopy in the Monitoring of Adult Traumatic Brain Injury: A Review,” J. Neurotrauma 32(13), 933–941 (2015).
[Crossref]

Sundeep, T. W.

M. Swoboda, M. G. Hochman, F. J. Fritz, J. S. Gopagoni, T. W. Sundeep, R. Scharf, Banerjee, and Tiley, “Non-invasive intracranial pressure sensor,” (2013).

Swanson, J.

W. Xu, P. Gerety, T. Aleman, J. Swanson, and J. Taylor, “Noninvasive methods of detecting increased intracranial pressure,” Childs Nerv Syst. 32(8), 1371–1386 (2016).
[Crossref]

Swoboda, M.

M. Swoboda, M. G. Hochman, F. J. Fritz, J. S. Gopagoni, T. W. Sundeep, R. Scharf, Banerjee, and Tiley, “Non-invasive intracranial pressure sensor,” (2013).

Synnot, A.

E. Needham, C. McFadyen, V. Newcombe, A. Synnot, M. Czosnyka, and D. Menon, “Cerebral Perfusion Pressure Targets Individualized to Pressure-Reactivity Index in Moderate to Severe Traumatic Brain Injury: A Systematic Review,” J. Neurotrauma 34(5), 963–970 (2017).
[Crossref]

Tagliabue, S.

J. B. Fischer, A. Ghouse, S. Tagliabue, F. Maruccia, R. Zucca, U. M. Weigel, J. Sahuquillo, M. A. Poca, and T. Durduran, “Derivation of an intracranial pressure index by the waveform analysis of cerebral blood flow measured non-invasively using fast diffuse correlation spectroscopy. The Niels Lassen Award Session and Oral Sessions,” J. Cereb. Blood Flow Metab. 39(1_suppl), 1–123 (2019).
[Crossref]

Tasker, R. C.

A. Fanelli, F. W. Vonberg, K. L. LaRovere, B. K. Walsh, E. R. Smith, S. Robinson, R. C. Tasker, and T. Heldt, “Fully automated, real-time, calibration-free, continuous noninvasive estimation of intracranial pressure in children,” J. Neurosurg. Pediatr. 24(5), 509–519 (2019).
[Crossref]

P. M. Kochanek, R. C. Tasker, N. Carney, A. M. Totten, P. D. Adelson, N. R. Selden, C. Davis-O’Reilly, E. L. Hart, M. J. Bell, S. L. Bratton, G. A. Grant, N. Kissoon, K. E. Reuter-Rice, M. S. Vavilala, and M. S. Wainwright, Guidelines for the Management of Pediatric Severe Traumatic Brain Injury, Third Edition: Update of the Brain Trauma Foundation Guidelines, 20(3S Suppl 1) (2019).

Taylor, J.

W. Xu, P. Gerety, T. Aleman, J. Swanson, and J. Taylor, “Noninvasive methods of detecting increased intracranial pressure,” Childs Nerv Syst. 32(8), 1371–1386 (2016).
[Crossref]

Thirion, B.

F. Pedregosa, G. Varoquaux, A. Gramfort, V. Michel, B. Thirion, and O. Grisel, and others, “Scikit-learn: Machine Learning in Python,” J. Mach. Learn. Res. 12, 2825–2830 (2011).

Tiley,

M. Swoboda, M. G. Hochman, F. J. Fritz, J. S. Gopagoni, T. W. Sundeep, R. Scharf, Banerjee, and Tiley, “Non-invasive intracranial pressure sensor,” (2013).

Timmons, S. D.

S. L. Bratton, R. M. Chestnut, J. Ghajar, F. F. M. Hammond, O. A. Harris, R. Hartl, G. T. Manley, A. Nemecek, D. W. Newell, G. U. Y. Rosenthal, J. Schouten, L. Shutter, S. D. Timmons, J. S. Ullman, W. Videtta, J. E. Wilberger, and D. W. Wright, “VII . Intracranial Pressure Monitoring Technology,” J. Neurotrauma 24(supplement 1), S-45–S-54 (2007).
[Crossref]

Totten, A. M.

P. M. Kochanek, R. C. Tasker, N. Carney, A. M. Totten, P. D. Adelson, N. R. Selden, C. Davis-O’Reilly, E. L. Hart, M. J. Bell, S. L. Bratton, G. A. Grant, N. Kissoon, K. E. Reuter-Rice, M. S. Vavilala, and M. S. Wainwright, Guidelines for the Management of Pediatric Severe Traumatic Brain Injury, Third Edition: Update of the Brain Trauma Foundation Guidelines, 20(3S Suppl 1) (2019).

Ullman, J. S.

S. L. Bratton, R. M. Chestnut, J. Ghajar, F. F. M. Hammond, O. A. Harris, R. Hartl, G. T. Manley, A. Nemecek, D. W. Newell, G. U. Y. Rosenthal, J. Schouten, L. Shutter, S. D. Timmons, J. S. Ullman, W. Videtta, J. E. Wilberger, and D. W. Wright, “VII . Intracranial Pressure Monitoring Technology,” J. Neurotrauma 24(supplement 1), S-45–S-54 (2007).
[Crossref]

Van den Berghe, G.

F. Güiza, B. Depreitere, I. Piper, G. Citerio, I. Chambers, P. A. Jones, T. Y. M. Lo, P. Enblad, P. Nillson, B. Feyen, P. Jorens, A. Maas, M. U. Schuhmann, R. Donald, L. Moss, G. Van den Berghe, and G. Meyfroidt, “Visualizing the pressure and time burden of intracranial hypertension in adult and paediatric traumatic brain injury,” Intensive Care Med. 41(6), 1067–1076 (2015).
[Crossref]

Vanhille, E.

A. R. Edouard, E. Vanhille, S. Le Moigno, D. Benhamou, and J.-X. Mazoit, “Non-invasive assessment of cerebral perfusion pressure in brain injured patients with moderate intracranial hypertension,” Br. J. Anaesth. 94(2), 216–221 (2005).
[Crossref]

Varoquaux, G.

F. Pedregosa, G. Varoquaux, A. Gramfort, V. Michel, B. Thirion, and O. Grisel, and others, “Scikit-learn: Machine Learning in Python,” J. Mach. Learn. Res. 12, 2825–2830 (2011).

Varsos, G. V.

G. V. Varsos, A. G. Kolias, P. Smielewski, K. M. Brady, V. G. Varsos, P. J. Hutchinson, J. D. Pickard, and M. Czosnyka, “A noninvasive estimation of cerebral perfusion pressure using critical closing pressure,” J. Neurosurg. 123(3), 638–648 (2015).
[Crossref]

Varsos, V. G.

G. V. Varsos, A. G. Kolias, P. Smielewski, K. M. Brady, V. G. Varsos, P. J. Hutchinson, J. D. Pickard, and M. Czosnyka, “A noninvasive estimation of cerebral perfusion pressure using critical closing pressure,” J. Neurosurg. 123(3), 638–648 (2015).
[Crossref]

Vavilala, M. S.

P. M. Kochanek, R. C. Tasker, N. Carney, A. M. Totten, P. D. Adelson, N. R. Selden, C. Davis-O’Reilly, E. L. Hart, M. J. Bell, S. L. Bratton, G. A. Grant, N. Kissoon, K. E. Reuter-Rice, M. S. Vavilala, and M. S. Wainwright, Guidelines for the Management of Pediatric Severe Traumatic Brain Injury, Third Edition: Update of the Brain Trauma Foundation Guidelines, 20(3S Suppl 1) (2019).

Vedolin, L. M.

K. T. Kahle, A. V. Kulkarni, D. D. Limbrick, B. C. Warf, L. G. Campos, R. Menegatti, and L. M. Vedolin, “Hydrocephalus in children,” Lancet 387(10020), 788–799 (2016).
[Crossref]

Videtta, W.

S. L. Bratton, R. M. Chestnut, J. Ghajar, F. F. M. Hammond, O. A. Harris, R. Hartl, G. T. Manley, A. Nemecek, D. W. Newell, G. U. Y. Rosenthal, J. Schouten, L. Shutter, S. D. Timmons, J. S. Ullman, W. Videtta, J. E. Wilberger, and D. W. Wright, “VII . Intracranial Pressure Monitoring Technology,” J. Neurotrauma 24(supplement 1), S-45–S-54 (2007).
[Crossref]

Vonberg, F. W.

A. Fanelli, F. W. Vonberg, K. L. LaRovere, B. K. Walsh, E. R. Smith, S. Robinson, R. C. Tasker, and T. Heldt, “Fully automated, real-time, calibration-free, continuous noninvasive estimation of intracranial pressure in children,” J. Neurosurg. Pediatr. 24(5), 509–519 (2019).
[Crossref]

Wager, S.

S. Wager, T. Hastie, and B. Efron, “Confidence Intervals for Random Forests: The Jackknife and the Infinitesimal Jackknife,” J. Mach. Learn. Res. 15, 1625–1651 (2014).

Wainwright, M. S.

P. M. Kochanek, R. C. Tasker, N. Carney, A. M. Totten, P. D. Adelson, N. R. Selden, C. Davis-O’Reilly, E. L. Hart, M. J. Bell, S. L. Bratton, G. A. Grant, N. Kissoon, K. E. Reuter-Rice, M. S. Vavilala, and M. S. Wainwright, Guidelines for the Management of Pediatric Severe Traumatic Brain Injury, Third Edition: Update of the Brain Trauma Foundation Guidelines, 20(3S Suppl 1) (2019).

Walker, S. A.

S. Fantini, M.-A. Franceschini, J. S. Maier, S. A. Walker, B. B. Barbieri, and E. Gratton, “Frequency-domain multichannel optical detector for noninvasive tissue spectroscopy and oximetry,” Opt. Eng. 34(1), 32 (1995).
[Crossref]

Walsh, B. K.

A. Fanelli, F. W. Vonberg, K. L. LaRovere, B. K. Walsh, E. R. Smith, S. Robinson, R. C. Tasker, and T. Heldt, “Fully automated, real-time, calibration-free, continuous noninvasive estimation of intracranial pressure in children,” J. Neurosurg. Pediatr. 24(5), 509–519 (2019).
[Crossref]

Wang, F.

X. Zhang, J. E. Medow, B. J. Iskandar, F. Wang, M. Shokoueinejad, J. Koueik, and J. G. Webster, “Invasive and noninvasive means of measuring intracranial pressure: A review,” Physiol. Meas. 38(8), R143–R182 (2017).
[Crossref]

Warf, B. C.

K. T. Kahle, A. V. Kulkarni, D. D. Limbrick, B. C. Warf, L. G. Campos, R. Menegatti, and L. M. Vedolin, “Hydrocephalus in children,” Lancet 387(10020), 788–799 (2016).
[Crossref]

Webster, J. G.

X. Zhang, J. E. Medow, B. J. Iskandar, F. Wang, M. Shokoueinejad, J. Koueik, and J. G. Webster, “Invasive and noninvasive means of measuring intracranial pressure: A review,” Physiol. Meas. 38(8), R143–R182 (2017).
[Crossref]

Weerakkody, R. A.

R. A. Weerakkody, M. Czosnyka, C. Zweifel, G. Castellani, P. Smielewski, K. Brady, J. D. Pickard, and Z. Czosnyka, “Near Infrared Spectroscopy as Possible Non-invasive Monitor of Slow Vasogenic ICP Waves,” Acta Neurochir. Suppl. 114, 181–185 (2012).
[Crossref]

Weigel, U. M.

J. B. Fischer, A. Ghouse, S. Tagliabue, F. Maruccia, R. Zucca, U. M. Weigel, J. Sahuquillo, M. A. Poca, and T. Durduran, “Derivation of an intracranial pressure index by the waveform analysis of cerebral blood flow measured non-invasively using fast diffuse correlation spectroscopy. The Niels Lassen Award Session and Oral Sessions,” J. Cereb. Blood Flow Metab. 39(1_suppl), 1–123 (2019).
[Crossref]

Wilberger, J. E.

S. L. Bratton, R. M. Chestnut, J. Ghajar, F. F. M. Hammond, O. A. Harris, R. Hartl, G. T. Manley, A. Nemecek, D. W. Newell, G. U. Y. Rosenthal, J. Schouten, L. Shutter, S. D. Timmons, J. S. Ullman, W. Videtta, J. E. Wilberger, and D. W. Wright, “VII . Intracranial Pressure Monitoring Technology,” J. Neurotrauma 24(supplement 1), S-45–S-54 (2007).
[Crossref]

Wilson, M. H.

M. H. Wilson, “Monro-Kellie 2.0: The dynamic vascular and venous pathophysiological components of intracranial pressure,” J. Cereb. Blood Flow Metab. 36(8), 1338–1350 (2016).
[Crossref]

Wright, D. W.

S. L. Bratton, R. M. Chestnut, J. Ghajar, F. F. M. Hammond, O. A. Harris, R. Hartl, G. T. Manley, A. Nemecek, D. W. Newell, G. U. Y. Rosenthal, J. Schouten, L. Shutter, S. D. Timmons, J. S. Ullman, W. Videtta, J. E. Wilberger, and D. W. Wright, “VII . Intracranial Pressure Monitoring Technology,” J. Neurotrauma 24(supplement 1), S-45–S-54 (2007).
[Crossref]

Xu, W.

W. Xu, P. Gerety, T. Aleman, J. Swanson, and J. Taylor, “Noninvasive methods of detecting increased intracranial pressure,” Childs Nerv Syst. 32(8), 1371–1386 (2016).
[Crossref]

Yang, J.

A. Ruesch, S. Schmitt, J. Yang, M. A. Smith, and J. M. Kainerstorfer, “Fluctuations in intracranial pressure can be estimated non-invasively using near-infrared spectroscopy in non-human primates,” J. Cereb. Blood Flow Metab. 37, 0271678X1989135 (2019).
[Crossref]

Yodh, A. G.

T. Durduran and A. G. Yodh, “Diffuse correlation spectroscopy for non-invasive, micro-vascular cerebral blood flow measurement,” NeuroImage 85, 51–63 (2014).
[Crossref]

D. A. Boas and A. G. Yodh, “Spatially varying dynamical properties of turbid media probed with diffusing temporal light correlation,” J. Opt. Soc. Am. 14(1), 192–215 (1997).
[Crossref]

G. Yu, T. Durduran, C. Zhou, R. Cheng, and A. G. Yodh, “Near-Infrared Diffuse Correlation Spectroscopy for Assessment of Tissue Blood Flow,” Handb. Biomed. Opt.195–216 (2011).
[Crossref]

Yu, G.

G. Yu, T. Durduran, C. Zhou, R. Cheng, and A. G. Yodh, “Near-Infrared Diffuse Correlation Spectroscopy for Assessment of Tissue Blood Flow,” Handb. Biomed. Opt.195–216 (2011).
[Crossref]

Zhang, X.

X. Zhang, J. E. Medow, B. J. Iskandar, F. Wang, M. Shokoueinejad, J. Koueik, and J. G. Webster, “Invasive and noninvasive means of measuring intracranial pressure: A review,” Physiol. Meas. 38(8), R143–R182 (2017).
[Crossref]

Zhou, C.

G. Yu, T. Durduran, C. Zhou, R. Cheng, and A. G. Yodh, “Near-Infrared Diffuse Correlation Spectroscopy for Assessment of Tissue Blood Flow,” Handb. Biomed. Opt.195–216 (2011).
[Crossref]

Zucca, R.

J. B. Fischer, A. Ghouse, S. Tagliabue, F. Maruccia, R. Zucca, U. M. Weigel, J. Sahuquillo, M. A. Poca, and T. Durduran, “Derivation of an intracranial pressure index by the waveform analysis of cerebral blood flow measured non-invasively using fast diffuse correlation spectroscopy. The Niels Lassen Award Session and Oral Sessions,” J. Cereb. Blood Flow Metab. 39(1_suppl), 1–123 (2019).
[Crossref]

Zwane, E.

A. A. Figaji, E. Zwane, A. G. Fieggen, P. Siesjo, and J. C. Peter, “Transcranial Doppler pulsatility index is not a reliable indicator of intracranial pressure in children with severe traumatic brain injury,” Surg. Neurol. 72(4), 389–394 (2009).
[Crossref]

Zweifel, C.

R. A. Weerakkody, M. Czosnyka, C. Zweifel, G. Castellani, P. Smielewski, K. Brady, J. D. Pickard, and Z. Czosnyka, “Near Infrared Spectroscopy as Possible Non-invasive Monitor of Slow Vasogenic ICP Waves,” Acta Neurochir. Suppl. 114, 181–185 (2012).
[Crossref]

E. Carrera, D.-J. Kim, G. Castellani, C. Zweifel, Z. Czosnyka, M. Kasprowicz, P. Smielewski, J. D. Pickard, and M. Czosnyka, “What Shapes Pulse Amplitude of Intracranial Pressure?” J. Neurotrauma 27(2), 317–324 (2010).
[Crossref]

C. Zweifel, G. Castellani, M. Czosnyka, E. Carrera, K. M. Brady, P. J. Kirkpatrick, J. D. Pickard, and P. Smielewski, “Continuous assessment of cerebral autoregulation with near-infrared spectroscopy in adults after subarachnoid hemorrhage,” Stroke 41(9), 1963–1968 (2010).
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Acta Neurochir. (2)

Z. Czosnyka and M. Czosnyka, “Long-term monitoring of intracranial pressure in normal pressure hydrocephalus and other CSF disorders,” Acta Neurochir. 159(10), 1979–1980 (2017).
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P. M. Lewis, P. Smielewski, J. D. Pickard, and M. Czosnyka, “Dynamic cerebral autoregulation: Should intracranial pressure be taken into account?” Acta Neurochir. 149(6), 549–555 (2007).
[Crossref]

Acta Neurochir. Suppl. (2)

M. Balestreri, M. Czosnyka, L. A. Steiner, M. Hiler, E. A. Schmidt, B. Matta, D. Menon, P. Hutchinson, and J. D. Pickard, “Association between outcome, cerebral pressure reactivity and slow ICP waves following head injury,” Acta Neurochir. Suppl. 95, 25–28 (2005).
[Crossref]

R. A. Weerakkody, M. Czosnyka, C. Zweifel, G. Castellani, P. Smielewski, K. Brady, J. D. Pickard, and Z. Czosnyka, “Near Infrared Spectroscopy as Possible Non-invasive Monitor of Slow Vasogenic ICP Waves,” Acta Neurochir. Suppl. 114, 181–185 (2012).
[Crossref]

Am. J. Emerg. Med. (1)

A. Amini, H. Kariman, A. Arhami Dolatabadi, H. R. Hatamabadi, H. Derakhshanfar, B. Mansouri, S. Safari, and R. Eqtesadi, “Use of the sonographic diameter of optic nerve sheath to estimate intracranial pressure,” Am. J. Emerg. Med. 31(1), 236–239 (2013).
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Anesth. Analg. (1)

M. Smith, “Monitoring intracranial pressure in traumatic brain injury,” Anesth. Analg. 106(1), 240–248 (2008).
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N. A. Lassen and M. S. Christensen, “Physiology of cerebral blood flow,” Br. J. Anaesth 48(8), 719–734 (1976).
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Br. J. Anaesth. (1)

A. R. Edouard, E. Vanhille, S. Le Moigno, D. Benhamou, and J.-X. Mazoit, “Non-invasive assessment of cerebral perfusion pressure in brain injured patients with moderate intracranial hypertension,” Br. J. Anaesth. 94(2), 216–221 (2005).
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Br. J. Audiol. (1)

A. Reid, R. J. Marchbanks, D. M. Burge, A. M. Martin, D. E. Bateman, J. D. Pickard, and A. P. Brightwell, “The relationship between intracranial pressure and tympanic membrane displacement,” Br. J. Audiol. 24(2), 123–129 (1990).
[Crossref]

Child. Nerv. Syst. (1)

C. Robba, D. Cardim, M. Czosnyka, F. Abecasis, S. Pezzato, S. Buratti, A. Moscatelli, C. Sortica, F. Racca, P. Pelosi, and F. Rasulo, “Ultrasound non-invasive intracranial pressure assessment in paediatric neurocritical care: a pilot study,” Child. Nerv. Syst. 36(1), 117–124 (2020).
[Crossref]

Childs Nerv Syst. (1)

W. Xu, P. Gerety, T. Aleman, J. Swanson, and J. Taylor, “Noninvasive methods of detecting increased intracranial pressure,” Childs Nerv Syst. 32(8), 1371–1386 (2016).
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Crit. Care Res. Pract. (1)

P. H. Raboel, J. Bartek, M. Andresen, B. M. Bellander, B. Romner, and J. F. Stover, “Intracranial pressure monitoring: Invasive versus non-invasive methods-A review,” Crit. Care Res. Pract. 2012, 1–14 (2012).
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Curr. Opin. Anaesthesiol. (1)

A. Dagal and A. M. Lam, “Cerebral autoregulation and anesthesia,” Curr. Opin. Anaesthesiol. 22(5), 547–552 (2009).
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Front. Neurol. (1)

C. Hawthorne and I. Piper, “Monitoring of intracranial pressure in patients with traumatic brain injury,” Front. Neurol. 5, 1–16 (2014).
[Crossref]

IEEE Trans. Biomed. Eng. (1)

X. Hu and M. Bergsneider, “Morphological clustering and analysis of intracranial pressure pulses (mocaip),” IEEE Trans. Biomed. Eng. 56(3), 696–705 (2009).
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Int. J. Mol. Sci. (1)

U. Kawoos, R. M. McCarron, C. R. Auker, and M. Chavko, “Advances in intracranial pressure monitoring and its significance in managing traumatic brain injury,” Int. J. Mol. Sci. 16(12), 28979–28997 (2015).
[Crossref]

Intensive Care Med. (1)

F. Güiza, B. Depreitere, I. Piper, G. Citerio, I. Chambers, P. A. Jones, T. Y. M. Lo, P. Enblad, P. Nillson, B. Feyen, P. Jorens, A. Maas, M. U. Schuhmann, R. Donald, L. Moss, G. Van den Berghe, and G. Meyfroidt, “Visualizing the pressure and time burden of intracranial hypertension in adult and paediatric traumatic brain injury,” Intensive Care Med. 41(6), 1067–1076 (2015).
[Crossref]

J. Cereb. Blood Flow Metab. (3)

M. H. Wilson, “Monro-Kellie 2.0: The dynamic vascular and venous pathophysiological components of intracranial pressure,” J. Cereb. Blood Flow Metab. 36(8), 1338–1350 (2016).
[Crossref]

A. Ruesch, S. Schmitt, J. Yang, M. A. Smith, and J. M. Kainerstorfer, “Fluctuations in intracranial pressure can be estimated non-invasively using near-infrared spectroscopy in non-human primates,” J. Cereb. Blood Flow Metab. 37, 0271678X1989135 (2019).
[Crossref]

J. B. Fischer, A. Ghouse, S. Tagliabue, F. Maruccia, R. Zucca, U. M. Weigel, J. Sahuquillo, M. A. Poca, and T. Durduran, “Derivation of an intracranial pressure index by the waveform analysis of cerebral blood flow measured non-invasively using fast diffuse correlation spectroscopy. The Niels Lassen Award Session and Oral Sessions,” J. Cereb. Blood Flow Metab. 39(1_suppl), 1–123 (2019).
[Crossref]

J. Mach. Learn. Res. (2)

F. Pedregosa, G. Varoquaux, A. Gramfort, V. Michel, B. Thirion, and O. Grisel, and others, “Scikit-learn: Machine Learning in Python,” J. Mach. Learn. Res. 12, 2825–2830 (2011).

S. Wager, T. Hastie, and B. Efron, “Confidence Intervals for Random Forests: The Jackknife and the Infinitesimal Jackknife,” J. Mach. Learn. Res. 15, 1625–1651 (2014).

J. Neurol., Neurosurg. Psychiatry (1)

M. Czosnyka and J. D. Pickard, “Monitoring and interpretation of intracranial pressure,” J. Neurol., Neurosurg. Psychiatry 75(6), 813–821 (2004).
[Crossref]

J. Neurosurg. (1)

G. V. Varsos, A. G. Kolias, P. Smielewski, K. M. Brady, V. G. Varsos, P. J. Hutchinson, J. D. Pickard, and M. Czosnyka, “A noninvasive estimation of cerebral perfusion pressure using critical closing pressure,” J. Neurosurg. 123(3), 638–648 (2015).
[Crossref]

J. Neurosurg. Pediatr. (1)

A. Fanelli, F. W. Vonberg, K. L. LaRovere, B. K. Walsh, E. R. Smith, S. Robinson, R. C. Tasker, and T. Heldt, “Fully automated, real-time, calibration-free, continuous noninvasive estimation of intracranial pressure in children,” J. Neurosurg. Pediatr. 24(5), 509–519 (2019).
[Crossref]

J. Neurotrauma (4)

D. J. Davies, Z. Su, M. T. Clancy, S. J. E. E. Lucas, H. Dehghani, A. Logan, and A. Belli, “Near-Infrared Spectroscopy in the Monitoring of Adult Traumatic Brain Injury: A Review,” J. Neurotrauma 32(13), 933–941 (2015).
[Crossref]

E. Needham, C. McFadyen, V. Newcombe, A. Synnot, M. Czosnyka, and D. Menon, “Cerebral Perfusion Pressure Targets Individualized to Pressure-Reactivity Index in Moderate to Severe Traumatic Brain Injury: A Systematic Review,” J. Neurotrauma 34(5), 963–970 (2017).
[Crossref]

S. L. Bratton, R. M. Chestnut, J. Ghajar, F. F. M. Hammond, O. A. Harris, R. Hartl, G. T. Manley, A. Nemecek, D. W. Newell, G. U. Y. Rosenthal, J. Schouten, L. Shutter, S. D. Timmons, J. S. Ullman, W. Videtta, J. E. Wilberger, and D. W. Wright, “VII . Intracranial Pressure Monitoring Technology,” J. Neurotrauma 24(supplement 1), S-45–S-54 (2007).
[Crossref]

E. Carrera, D.-J. Kim, G. Castellani, C. Zweifel, Z. Czosnyka, M. Kasprowicz, P. Smielewski, J. D. Pickard, and M. Czosnyka, “What Shapes Pulse Amplitude of Intracranial Pressure?” J. Neurotrauma 27(2), 317–324 (2010).
[Crossref]

J. Opt. Soc. Am. (1)

D. A. Boas and A. G. Yodh, “Spatially varying dynamical properties of turbid media probed with diffusing temporal light correlation,” J. Opt. Soc. Am. 14(1), 192–215 (1997).
[Crossref]

Lancet (1)

K. T. Kahle, A. V. Kulkarni, D. D. Limbrick, B. C. Warf, L. G. Campos, R. Menegatti, and L. M. Vedolin, “Hydrocephalus in children,” Lancet 387(10020), 788–799 (2016).
[Crossref]

Mach. Learn. (1)

L. E. O. Breiman, “Random Forests,” Mach. Learn. 45(1), 5–32 (2001).
[Crossref]

Neurocrit. Care (3)

M. Balestreri, M. Czosnyka, P. Hutchinson, L. A. Steiner, M. Hiler, P. Smielewski, and J. D. Pickard, “Impact of Intracranial Pressure and Cerebral Perfusion Pressure on Severe Disability and Mortality After Head Injury,” Neurocrit. Care 4(1), 008–013 (2006).
[Crossref]

D. Cardim, C. Robba, M. Bohdanowicz, J. Donnelly, B. Cabella, X. Liu, M. Cabeleira, P. Smielewski, B. Schmidt, and M. Czosnyka, “Non-invasive Monitoring of Intracranial Pressure Using Transcranial Doppler Ultrasonography: Is It Possible?” Neurocrit. Care 25(3), 473–491 (2016).
[Crossref]

J. B. Rosenberg, A. L. Shiloh, R. H. Savel, and L. A. Eisen, “Non-invasive methods of estimating intracranial pressure,” Neurocrit. Care 15(3), 599–608 (2011).
[Crossref]

NeuroImage (1)

T. Durduran and A. G. Yodh, “Diffuse correlation spectroscopy for non-invasive, micro-vascular cerebral blood flow measurement,” NeuroImage 85, 51–63 (2014).
[Crossref]

Neurology (1)

N. Lenfeldt, L. O. D. Koskinen, A. T. Bergenheim, J. Malm, and A. Eklund, “CSF pressure assessed by lumbar puncture agrees with intracranial pressure,” Neurology 68(2), 155–158 (2007).
[Crossref]

Opt. Eng. (1)

S. Fantini, M.-A. Franceschini, J. S. Maier, S. A. Walker, B. B. Barbieri, and E. Gratton, “Frequency-domain multichannel optical detector for noninvasive tissue spectroscopy and oximetry,” Opt. Eng. 34(1), 32 (1995).
[Crossref]

Physiol. Meas. (1)

X. Zhang, J. E. Medow, B. J. Iskandar, F. Wang, M. Shokoueinejad, J. Koueik, and J. G. Webster, “Invasive and noninvasive means of measuring intracranial pressure: A review,” Physiol. Meas. 38(8), R143–R182 (2017).
[Crossref]

Stroke (1)

C. Zweifel, G. Castellani, M. Czosnyka, E. Carrera, K. M. Brady, P. J. Kirkpatrick, J. D. Pickard, and P. Smielewski, “Continuous assessment of cerebral autoregulation with near-infrared spectroscopy in adults after subarachnoid hemorrhage,” Stroke 41(9), 1963–1968 (2010).
[Crossref]

Surg. Neurol. (1)

A. A. Figaji, E. Zwane, A. G. Fieggen, P. Siesjo, and J. C. Peter, “Transcranial Doppler pulsatility index is not a reliable indicator of intracranial pressure in children with severe traumatic brain injury,” Surg. Neurol. 72(4), 389–394 (2009).
[Crossref]

Ultrasonics (1)

V. Petkus, A. Ragauskas, and R. Jurkonis, “Investigation of intracranial media ultrasonic monitoring model,” Ultrasonics 40(1-8), 829–833 (2002).
[Crossref]

Other (5)

M. Swoboda, M. G. Hochman, F. J. Fritz, J. S. Gopagoni, T. W. Sundeep, R. Scharf, Banerjee, and Tiley, “Non-invasive intracranial pressure sensor,” (2013).

P. Le Roux, Intracranial Pressure Monitoring and Management (CRC Press/Taylor and Francis Group, 2016).

P. M. Kochanek, R. C. Tasker, N. Carney, A. M. Totten, P. D. Adelson, N. R. Selden, C. Davis-O’Reilly, E. L. Hart, M. J. Bell, S. L. Bratton, G. A. Grant, N. Kissoon, K. E. Reuter-Rice, M. S. Vavilala, and M. S. Wainwright, Guidelines for the Management of Pediatric Severe Traumatic Brain Injury, Third Edition: Update of the Brain Trauma Foundation Guidelines, 20(3S Suppl 1) (2019).

G. Yu, T. Durduran, C. Zhou, R. Cheng, and A. G. Yodh, “Near-Infrared Diffuse Correlation Spectroscopy for Assessment of Tissue Blood Flow,” Handb. Biomed. Opt.195–216 (2011).
[Crossref]

A. Criminisi and J. Shotton, Decision Forests for Computer Vision and Medical Image Analysis (Springer, 2013).

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Figures (4)

Fig. 1.
Fig. 1. Experimental setup and data analysis. (a) shows the experimental setup with the placement of optical fibers and pressure sensor as well as the catheter on the exposed skull of the monkey. The traces at the right show an example of changes in cerebral blood flow (ΔCBF) and ICP. The dashed line marks the maximum of the QRS complex in the EKG recording. (b) shows how the saline reservoir connected to the lateral ventricle influences ICP. The left two pulses show ICP pulsation shape changes, the right two curves show similar changed in blood flow pulsation. (c) shows which morphologically relevant features were extracted from the cartoon version of an ideal ΔCBF pulse.
Fig. 2.
Fig. 2. Example recording of data in one subject. (a) shows a full measurement from one subject, low-pass filtered (cut off frequency at 0.008 Hz) to emphasize the baseline. Dashed line indicates where figure (b) is located. In (b), a close-up of data at the dashed line is shown to see individual pulses. The pulses were filtered by a moving average of 0.1 seconds.
Fig. 3.
Fig. 3. Averaged cardiac pulses of all five NHP for ΔCBF, ICP and ABP. The solid black line in each graph shows all pulses below 10 mmHg for the specific NHP. The red dashed line shows pulse averages of ICP baselines above 20 mmHg. The shaded area shows the standard deviation over all averaged pulses at each time point. The pulses were normalized in height by division of maximum, thus showing a per unit (p.u.) magnitude, and spline interpolated in time to be of the same length.
Fig. 4.
Fig. 4. Results of the regression forest machine learning approach. (a) shows the distribution of the available data. The dashed line marks the maximum ICP level that was fitted for at 30 mmHg. (b) shows the distribution of features used in the regression forest as a percentage of all chosen features in all decision criteria generated. The standard deviation across individual trees is shown as error bars. Nomenclature is according to Table 1. (c) shows the performance of the regression forest by plotting estimated ICP (ICPest) over invasively measured ground truth (ICPinv). The solid line shows the ideal fit, while the dashed lines mark an area of 2 mmHg around the ideal fit. The shaded area shows the confidence interval. (d) graphs the difference between ICPest and ICPinv over ICPinv in a Bland-Altman plot. The dashed lines span a region of 95% of the distribution, corresponding to a standard deviation of 1.96. The histogram on the right of this graph shows the distribution of data points in number of samples. (e) shows a continuous estimate of ICP for NHP 3. The gray line shows the estimated ICP, and the black line the invasively measured ICP. An r2 = 0.92 and a mean squared error MSE = 3.2 mmHg were achieved.

Tables (1)

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Table 1. Morphological features extracted from cardiac pulsation in ΔCBF

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