Wehrens XHT, Rouwet EV, oude Egbrink MGA, Slaaf DW, Ramsay G. Effects of experimental lower-limb ischaemia-reperfusion injury on the mesenteric microcirculation.
Br J Surg 2002;
89:185-91. [PMID:
11856131 DOI:
10.1046/j.0007-1323.2001.01973.x]
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Abstract
BACKGROUND
Ischaemia-reperfusion (I-R) of the leg is associated with functional and structural changes in the intestine. This study assessed whether acute hind-limb I-R in rats induced a reduction in perfusion and/or signs of an inflammatory response in the intestine.
METHODS
Rats were subjected to 2 h of unilateral hind-limb ischaemia followed by 2 h of reperfusion (I-R group, n = 9) or to a sham procedure (control group, n = 9). Mesenteric microvascular diameters, red blood cell velocity, blood flow and leucocyte-vessel wall interactions during reperfusion were measured using intravital microscopy.
RESULTS
Blood pressure and heart rate decreased from 30 min of reperfusion onwards in the I-R group compared with controls. From 15 min after the start of reperfusion, mesenteric arteriolar and venular red blood cell velocity and blood flow decreased by 40-50 per cent. Microvascular diameters and leucocyte-vessel wall interactions did not change.
CONCLUSION
Restoration of blood flow to an acutely ischaemic hind limb led to a significant decline in the splanchnic microcirculatory blood flow. There were, however, no signs of an early inflammatory response in the gut.
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