Biomaterial Database

[Coefficient of capillary filtration and distensibility of small intestine vessels at various levels of blood flow and venous and perfusion pressure]. 1986

G V Cherniavskaia, and S A Polenov

In the cat decentralized small intestine perfused with a constant blood volume, the capillary filtration coefficient (CFC) increased from 0.02 to 0.22 ml/min/mm Hg/100 g on increase of the venous pressure from 0 to 18 mm Hg. The stretching ability of the intestinal veins was maximal at mean values of the venous pressure (6-18 mm Hg) and decreased at low (0-3 mm Hg) and high (24 mm Hg) values. At 6-24 mm Hg, a vein-arteriolar response occurred consisting of two components: a fast short (20-30 sec) and a slow one (stable). Changes within the large range of blood flow (30-170%) and perfusion pressure (30-170 mm Hg) did not affect the CFC or the stretching ability. In the blood flow decreased by 25, 50 and 75%, the O2 extraction from the blood consistently increased, the O2 consumption was slightly reduced, and the CFC did not change. A hypothesis is advanced that the intestine precapillary sphincters are more sensitive to decrease of the arterial blood pO2 than to decrease of the O2 total transport to the intestine due to reduction of the blood flow.

UI	MeSH Term	Description	Entries
D007421	Intestine, Small	The portion of the GASTROINTESTINAL TRACT between the PYLORUS of the STOMACH and the ILEOCECAL VALVE of the LARGE INTESTINE. It is divisible into three portions: the DUODENUM, the JEJUNUM, and the ILEUM.	Small Intestine,Intestines, Small,Small Intestines
D008297	Male		Males
D010101	Oxygen Consumption	The rate at which oxygen is used by a tissue; microliters of oxygen STPD used per milligram of tissue per hour; the rate at which oxygen enters the blood from alveolar gas, equal in the steady state to the consumption of oxygen by tissue metabolism throughout the body. (Stedman, 25th ed, p346)	Consumption, Oxygen,Consumptions, Oxygen,Oxygen Consumptions
D001794	Blood Pressure	PRESSURE of the BLOOD on the ARTERIES and other BLOOD VESSELS.	Systolic Pressure,Diastolic Pressure,Pulse Pressure,Pressure, Blood,Pressure, Diastolic,Pressure, Pulse,Pressure, Systolic,Pressures, Systolic
D001808	Blood Vessels	Any of the tubular vessels conveying the blood (arteries, arterioles, capillaries, venules, and veins).	Blood Vessel,Vessel, Blood,Vessels, Blood
D002199	Capillary Permeability	The property of blood capillary ENDOTHELIUM that allows for the selective exchange of substances between the blood and surrounding tissues and through membranous barriers such as the BLOOD-AIR BARRIER; BLOOD-AQUEOUS BARRIER; BLOOD-BRAIN BARRIER; BLOOD-NERVE BARRIER; BLOOD-RETINAL BARRIER; and BLOOD-TESTIS BARRIER. Small lipid-soluble molecules such as carbon dioxide and oxygen move freely by diffusion. Water and water-soluble molecules cannot pass through the endothelial walls and are dependent on microscopic pores. These pores show narrow areas (TIGHT JUNCTIONS) which may limit large molecule movement.	Microvascular Permeability,Permeability, Capillary,Permeability, Microvascular,Vascular Permeability,Capillary Permeabilities,Microvascular Permeabilities,Permeabilities, Capillary,Permeabilities, Microvascular,Permeabilities, Vascular,Permeability, Vascular,Vascular Permeabilities
D002415	Cats	The domestic cat, Felis catus, of the carnivore family FELIDAE, comprising over 30 different breeds. The domestic cat is descended primarily from the wild cat of Africa and extreme southwestern Asia. Though probably present in towns in Palestine as long ago as 7000 years, actual domestication occurred in Egypt about 4000 years ago. (From Walker's Mammals of the World, 6th ed, p801)	Felis catus,Felis domesticus,Domestic Cats,Felis domestica,Felis sylvestris catus,Cat,Cat, Domestic,Cats, Domestic,Domestic Cat
D004548	Elasticity	Resistance and recovery from distortion of shape.
D005260	Female		Females
D006439	Hemodynamics	The movement and the forces involved in the movement of the blood through the CARDIOVASCULAR SYSTEM.	Hemodynamic