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International Journal of Colorectal Disease
Published in: International Journal of Colorectal Disease 4/2006

01-05-2006 | Original Article

Validation of IC-VIEW fluorescence videography in a rabbit model of mesenteric ischaemia and reperfusion

Authors: C. Toens, C. J. Krones, U. Blum, V. Fernandez, J. Grommes, F. Hoelzl, M. Stumpf, U. Klinge, V. Schumpelick

Published in: International Journal of Colorectal Disease | Issue 4/2006

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Abstract

Background/Aims

Mortality in mesenteric ischaemia can be reduced by an optimised extent of resection. Up to now, no technique supplementing a surgeon's experience has achieved clinical acceptance. Besides a qualitative interpretation, the new technique of computer-assisted laser-fluorescence videography affords quantification of staining intensities. The aim of this study was to investigate the scientific value of this technique in mesenteric ischaemia in a rabbit model of controlled mesenteric ischaemia and reperfusion.

Methods

We used an established rabbit model of mesenteric ischaemia (group I, n=6) and reperfusion (group II, n=6). In each animal, three loops (each of 10 cm) of the small intestine were clamped (group I, 40 min; group II, 60 and 20 min reperfusion). For further evaluation, all loops were divided into five segments of 2×2 cm (total number of investigated areas, n=180). Measurement of vascular patency was performed by laser-fluorescence videography (pixel intensity per second). As standard, we used radioactive microspheres (impulse per minute per gram). In addition, the extent of ischaemic tissue damage was identified by histological examination. Statistical data were analysed by using regression analysis to define the regression coefficient r.

Results/Findings

Laser-fluorescence videography and the microsphere technique demonstrated a close and linear correlation: ischaemic segments, r=0.90±0.07; reperfusion segments, r=0.85±0.02; overall, r=0.92±0.07. There was no reproducible correlation to cellular damage in histology.

Interpretation/Conclusion

Computer-assisted laser-fluorescence videography is a feasible, reliable, and valid experimental method for the detection of mesenteric blood supply and intestinal microcirculation. Clinical application is conceivable in mesenteric ischaemia and infarction as well as the operative transposition of intestine. As limiting values to identify the irreversible necrosis are not yet defined, further studies have to analyse the clinical impact more precisely.
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Metadata
Title
Validation of IC-VIEW fluorescence videography in a rabbit model of mesenteric ischaemia and reperfusion
Authors
C. Toens
C. J. Krones
U. Blum
V. Fernandez
J. Grommes
F. Hoelzl
M. Stumpf
U. Klinge
V. Schumpelick
Publication date
01-05-2006
Publisher
Springer-Verlag
Published in
International Journal of Colorectal Disease / Issue 4/2006
Print ISSN: 0179-1958
Electronic ISSN: 1432-1262
DOI
https://doi.org/10.1007/s00384-005-0017-1

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