Open AccessA Comparison of the He Ne Laser and Ultrasound Doppler Systems in the Determination of Viability of Ischemic Canine Intestine
Author(s) -
Robert Rotering,
John Dixon,
Greg Holloway,
Dana McCloskey
Publication year - 1982
Publication title -
annals of surgery
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 4.153
H-Index - 309
eISSN - 1528-1140
pISSN - 0003-4932
DOI - 10.1097/00000658-198212001-00016
Subject(s) - medicine , laser doppler velocimetry , doppler effect , ultrasound , blood supply , laser , perfusion , radiology , ischemia , doppler ultrasound , biomedical engineering , blood flow , surgery , cardiology , optics , physics , astronomy
One of the most challenging intraoperative dilemmas continues to be determination of viability of ischemic bowel. Many techniques and devices are available to help the surgeon, probably the most useful of which is the ultrasound Doppler. A more recently developed system, the laser Doppler, has a flexible optical fiber and fine tip probe that can be approximated onto or endoscopically passed into the gastrointestinal tract. This study was undertaken to experimentally compare the He Ne laser and ultrasound Doppler systems in predicting viability of ischemic canine intestine. Twenty ischemic bowel zones were created in dogs by division of the mesenteric blood supply. Determination of the last site of antimesenteric serosal nor fusion was then marked with each Doppler. Additionally, the fine tip probe was endoscopically passed across the ischemic zone and mucosal perfusion determined. Thus, each zone was marked three times, each indicating the anticipated site of necrosis by each method. The animals were killed 24 hours later and the tissues studied histologically. The results demonstrated that both the serosally applied and endoscopically placed laser Doppler were closer to predicting the point of total transmural necrosis. The possible clinical advantage of this device in prevention of short gun syndromes is readily apparent. The additional asset of a flexible optical fiber than can be endoscopically or laparoscopically passed make it an even more attractive modality. The findings of this study attested to the superior sensitivity, ease of use, and objectivity of the laser Doppler when compared with the ultrasound system.