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Laparoscopic Infrared Imaging
By: W. Roberts, T.A. Dinkel, P.G. Schulam, L. Bonnell, L.R. Kavoussi
Abstract:
A system was developed to determine the potential role of infrared imaging as
a tool for localizing anatomic structures and assessing tissue viability during
laparoscopic surgical procedures. A camera system sensitive to emitted energy in
the midinfrared range (3-5µm) was incorporated into a two-channel visible
laparoscope. Laparoscopic cholecystectomy, dissection of the ureter, and
assessment of bowel perfusion were performed in a porcine model with the aid of
this infrared imaging system. Inexperienced laparoscopists were asked to
localize and differentiate structures before dissection using the visible system
and then the infrared system. Assessment of bowel perfusion was also conducted
using each system. Infrared imaging proved to be useful in differentiating
between blood vessels and other anatomic structures. Differentiation of the
cystic duct and arteries and transperitoneal localization of the ureter were
successful in all instances using the infrared system when use of the visible
system had failed. This system also permitted assessment of bowel perfusion
during laparoscopic occlusion of mesenteric vessels. These initial studies
demonstrate that infrared imaging may improve the differentiation and
localization of anatomic structures and allow assessment of physiologic
parameters such as perfusion not previously attainable with visible laparoscopic
techniques may thus potentially be a powerful adjunct to laparoscopic surgery. For a free copy of the complete article, please write to
Vipera Systems
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