Transmission of pressure within the abdomen

Autor:	J. Hammond, L. Nasiff, F. D. McCool, George E. Tzelepis
Rok vydání:	1996
Předmět:	Male Supine position medicine.diagnostic_test Physiology business.industry Colonoscopy Rectum Sigmoid colon Anatomy Middle Aged Models Biological Intracolonic medicine.anatomical_structure Homogeneous Physiology (medical) Abdomen Pressure medicine Humans Lung volumes business
Zdroj:	Journal of Applied Physiology. 81:1111-1114
ISSN:	1522-1601 8750-7587
DOI:	10.1152/jappl.1996.81.3.1111
Popis:	The extent to which transmission of pressure within the abdomen is accomplished in accordance with the laws of fluid mechanics, i.e., homogeneous transmission to all portions of the abdomen, is controversial. To examine the cranial-to-caudal as well as side-to-side transmission of pressure within the abdomen in humans, we measured intra-abdominal pressure at four sites in five subjects undergoing colonoscopy. Liquid-filled catheters were inserted into the colon, and intracolonic pressure was measured in the rectum and in transverse, descending, and sigmoid colon. Differences in intracolonic pressure were recorded during breaths to total lung capacity and brief expulsive maneuvers. Measurements were taken in the supine, right lateral, and seated position. Comparison of pressure swings at all sites showed that the pressure changes were nearly equal during both inspiratory and expulsive maneuvers. The changes in pressure were uniform in the cephalocaudal axis as from side to side. We conclude that transmission of abdominal pressure in humans is nearly homogeneous. Our findings provide support for the hydraulic model of abdominal mechanics.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c4e58d57acd112478473464ddf281810 https://doi.org/10.1152/jappl.1996.81.3.1111 Zobrazit plný text záznamu