Real-time energy metabolism of intestine during arterial versus venous occlusion in the rat.
BACKGROUND
Although it is less frequently encountered, mesenteric vein occlusion poses as important a problem as mesenteric artery occlusion. The energy metabolism of intestinal tissue during venous occlusion and reperfusion was studied.


METHODS
Male Wistar rats were studied in four groups of 17 animals each. Intestinal ischemia was induced by clamping the superior mesenteric artery ([SMA] occlusion [O]) or vein (SMVO) for 30 or 60 min, followed by reperfusion. Magnetic resonance spectroscopy was employed to continuously monitor the energy metabolism. Additionally, intestinal motility was monitored and histological examination was performed on resected specimens.


RESULTS
Energy metabolism in SMVO during ischemia was reduced more slowly than in SMAO, but recovery after reperfusion was poorer in SMVO. During ischemia, the contractive response of the intestine lasted longer in SMVO than in SMAO. Histologically, mucosal and subserosal hemorrhage was more severe in SMVO.


CONCLUSIONS
In contrast to SMAO, SMVO caused less severe reduction of energy metabolism, at the expense of hemorrhage and tissue damage.
Kimura
Masahiro
M
Second Department of Surgery, Nagoya City University Medical School, 1 Kawasumi, Mizuho-ku, Nagoya 467-8601, Japan.
Kataoka
Makoto
M
Kuwabara
Yoshiyuki
Y
Sato
Atsushi
A
Sugiura
Masahiko
M
Fujii
Yoshitaka
Y
D000818:Animals; D004195:Disease Models, Animal; D004734:Energy Metabolism; D005769:Gastrointestinal Motility / Q000502:physiology*; D007413:Intestinal Mucosa / Q000378:metabolism*; D009682:Magnetic Resonance Spectroscopy; D008297:Male; D017538:Mesenteric Artery, Superior; D008641:Mesenteric Vascular Occlusion / Q000378:metabolism*; D008642:Mesenteric Veins; D051381:Rats; D017208:Rats, Wistar; D015424:Reperfusion