Ff. Gudmundsson et al., Effects of prolonged increased intra-abdominal pressure on gastrointestinal blood flow in pigs, SURG ENDOSC, 15(8), 2001, pp. 854-860
Citations number
20
Categorie Soggetti
Surgery
Journal title
SURGICAL ENDOSCOPY-ULTRASOUND AND INTERVENTIONAL TECHNIQUES
Background: The aim of the study was to investigate the effects of prolonge
d intra-abdominal pressure on systemic hemodynamics and gastrointestinal bl
ood circulation.
Methods: The intra-abdominal pressure in anesthetized pigs was elevated to
20 mmHg (7 animals), 30 mmHg (7 animals), and 40 mmHg (4 animals), respecti
vely. These pressures were maintained for 3 h by intra-abdominal infusion o
f Ringer's solution. A control group of seven animals had normal intra-abdo
minal pressure (IAP). Transit time flowmetry and colored microspheres were
used to measure blood flow.
Results: An IAP of 20 mmHg did not cause significant changes in systemic he
modynamics or tissue blood flow. An IAP of 30 mmHg caused reduced blood flo
w in the portal vein, gastric mucosa, small bowel mucosa, pancreas, spleen,
and liver. Serum lactate increased in animals with an IAP of 30 mmHg, but
microscopy did not disclose mucosal damage in the stomach or small bowel. A
n IAP of 40 mmHg was followed by severe circulatory changes.
Conclusions: Prolonged IAP at 20 mmHg did not cause changes in general hemo
dynamics or gastrointestinal blood flow. Prolonged IAP at 30 mmHg caused re
duced portal venous blood flow and reduced tissue flow in various abdominal
organs, but no mucosal injury. A prolonged IAP of 40 mmHg represented a da
ngerous trauma to the animals.