Plasma renin activity, renal artery blood flow and cortical tissue oxygen tensionin haemorrhagic hypotension. 1977

L S Nuutinen, and S Tuononen, and M Kairaluoma, and T K Larmi, and A Hollmen

The changes occurring in plasma renin activity (PRA), tissue oxygen tension of the renal cortex and the change in renal total blood flow were studied during haemorrhagic hypotension in six dogs. The flow was measured with an electromagnetic flowmeter, the plasma renin activity was determined by radioimmunoassay and tissue oxygen tension with IBC oxygen electrodes. Haemorrhagic hypotension led to a significan increase in PRA. The fall in renal total blood flow and cortical tissue oxygen tension were significant after all three epizodes of bleeding (each of 10 ml/kg. Metabolic acidosis increased after every bleed. The correlation between PRA, renal blood flow and cortical tissue oxygen tension is evaluated in the discussion.

UI MeSH Term Description Entries
D007022 Hypotension Abnormally low BLOOD PRESSURE that can result in inadequate blood flow to the brain and other vital organs. Common symptom is DIZZINESS but greater negative impacts on the body occur when there is prolonged depravation of oxygen and nutrients. Blood Pressure, Low,Hypotension, Vascular,Low Blood Pressure,Vascular Hypotension
D007668 Kidney Body organ that filters blood for the secretion of URINE and that regulates ion concentrations. Kidneys
D007672 Kidney Cortex The outer zone of the KIDNEY, beneath the capsule, consisting of KIDNEY GLOMERULUS; KIDNEY TUBULES, DISTAL; and KIDNEY TUBULES, PROXIMAL. Cortex, Kidney
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
D010313 Partial Pressure The pressure that would be exerted by one component of a mixture of gases if it were present alone in a container. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed) Partial Pressures,Pressure, Partial,Pressures, Partial
D011863 Radioimmunoassay Classic quantitative assay for detection of antigen-antibody reactions using a radioactively labeled substance (radioligand) either directly or indirectly to measure the binding of the unlabeled substance to a specific antibody or other receptor system. Non-immunogenic substances (e.g., haptens) can be measured if coupled to larger carrier proteins (e.g., bovine gamma-globulin or human serum albumin) capable of inducing antibody formation. Radioimmunoassays
D012039 Regional Blood Flow The flow of BLOOD through or around an organ or region of the body. Blood Flow, Regional,Blood Flows, Regional,Flow, Regional Blood,Flows, Regional Blood,Regional Blood Flows
D012077 Renal Artery A branch of the abdominal aorta which supplies the kidneys, adrenal glands and ureters. Arteries, Renal,Artery, Renal,Renal Arteries
D012083 Renin A highly specific (Leu-Leu) endopeptidase that generates ANGIOTENSIN I from its precursor ANGIOTENSINOGEN, leading to a cascade of reactions which elevate BLOOD PRESSURE and increase sodium retention by the kidney in the RENIN-ANGIOTENSIN SYSTEM. The enzyme was formerly listed as EC 3.4.99.19. Angiotensin-Forming Enzyme,Angiotensinogenase,Big Renin,Cryorenin,Inactive Renin,Pre-Prorenin,Preprorenin,Prorenin,Angiotensin Forming Enzyme,Pre Prorenin,Renin, Big,Renin, Inactive
D001783 Blood Flow Velocity A value equal to the total volume flow divided by the cross-sectional area of the vascular bed. Blood Flow Velocities,Flow Velocities, Blood,Flow Velocity, Blood,Velocities, Blood Flow,Velocity, Blood Flow

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