Abstract

A technique is described for the computer control of temperature during laser vessel welding. The technique is based on the use of thermal feedback from a calibrated IR sensor. The utilization of thermal feedback makes it possible for welding to be performed at a quasiconstant temperature. An experimental system based on this concept has been developed and evaluated in mock anastomoses with vascular tissue. A computer simulation of laser vessel welding with a one-dimensional heat conduction model has been performed. Model parameters have been adjusted so that the relative effect of laser penetration depth and tissue dehydration as well as the role of thermal feedback in limiting the peak surface temperature can be studied. The results of the mock anastomoses are discussed in light of the computer model.

© 1993 Optical Society of America

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