Biomaterial Database

The ratio of body haematocrit to venous haematocrit in open heart surgery and estimation of the blood volume in the large and small vessels. 1979

B Tanos, and G Kovács

Double tracer blood volume technique revealed in open heart surgery patients a wide variability of Fcells-value in about 11 per cent of cases investigated, from the "normal" 0.91 value. The possible calculational error of blood volume measurements by single-isotopic--haematocrit methods in the normal or subnormal LVH-ranges point to the superiority of plasma volume determinations in the calculation of the total blood volume. The calculation of the volume of the blood-component actually not-labelled during single-isotopic--haematocrit procedures can be so highly inaccurate because of the hidden deviation of Fcells-value, that such misleading arithmetics has no real value and therefore should be omitted. Estimation of the large vessel and small vessel volumes and haematocrits in patients showed a rough 70 per cent---30 per cent distribution of the circulating blood volume between large and small vessels and an LVH tosmall vessel haematocrit ratio of 2:1 to 2:1.5. This offers a possibility to divide the circulating blood volume into a haemodynamically active (large vessel area) and a metabolically active (small vessel area) part, which can have important diagnostic and prognostic implications.

UI	MeSH Term	Description	Entries
D010953	Plasma Volume	Volume of PLASMA in the circulation. It is usually measured by INDICATOR DILUTION TECHNIQUES.	Blood Plasma Volume,Blood Plasma Volumes,Plasma Volumes,Volume, Blood Plasma,Volume, Plasma,Volumes, Blood Plasma,Volumes, Plasma
D001810	Blood Volume	Volume of circulating BLOOD. It is the sum of the PLASMA VOLUME and ERYTHROCYTE VOLUME.	Blood Volumes,Volume, Blood,Volumes, Blood
D002315	Cardiopulmonary Bypass	Diversion of the flow of blood from the entrance of the right atrium directly to the aorta (or femoral artery) via an oxygenator thus bypassing both the heart and lungs.	Heart-Lung Bypass,Bypass, Cardiopulmonary,Bypass, Heart-Lung,Bypasses, Cardiopulmonary,Bypasses, Heart-Lung,Cardiopulmonary Bypasses,Heart Lung Bypass,Heart-Lung Bypasses
D002860	Chromium Radioisotopes	Unstable isotopes of chromium that decay or disintegrate emitting radiation. Cr atoms with atomic weights of 46-49, 51, 55, and 56 are radioactive chromium isotopes.	Radioisotopes, Chromium
D004911	Erythrocyte Volume	Volume of circulating ERYTHROCYTES . It is usually measured by RADIOISOTOPE DILUTION TECHNIQUE.	Red Cell Mass,Erythrocyte Volumes,Mass, Red Cell,Masses, Red Cell,Red Cell Masses,Volume, Erythrocyte,Volumes, Erythrocyte
D005112	Extracorporeal Circulation	Diversion of blood flow through a circuit located outside the body but continuous with the bodily circulation.	Circulation, Extracorporeal,Circulations, Extracorporeal,Extracorporeal Circulations
D006348	Cardiac Surgical Procedures	Surgery performed on the heart.	Cardiac Surgical Procedure,Heart Surgical Procedure,Heart Surgical Procedures,Procedure, Cardiac Surgical,Procedure, Heart Surgical,Procedures, Cardiac Surgical,Procedures, Heart Surgical,Surgical Procedure, Cardiac,Surgical Procedure, Heart,Surgical Procedures, Cardiac,Surgical Procedures, Heart
D006400	Hematocrit	The volume of packed RED BLOOD CELLS in a blood specimen. The volume is measured by centrifugation in a tube with graduated markings, or with automated blood cell counters. It is an indicator of erythrocyte status in disease. For example, ANEMIA shows a low value; POLYCYTHEMIA, a high value.	Erythrocyte Volume, Packed,Packed Red-Cell Volume,Erythrocyte Volumes, Packed,Hematocrits,Packed Erythrocyte Volume,Packed Erythrocyte Volumes,Packed Red Cell Volume,Packed Red-Cell Volumes,Red-Cell Volume, Packed,Red-Cell Volumes, Packed,Volume, Packed Erythrocyte,Volume, Packed Red-Cell,Volumes, Packed Erythrocyte,Volumes, Packed Red-Cell
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D012711	Serum Albumin, Radio-Iodinated	Normal human serum albumin mildly iodinated with radioactive iodine (131-I) which has a half-life of 8 days, and emits beta and gamma rays. It is used as a diagnostic aid in blood volume determination. (from Merck Index, 11th ed)	(131)I-MAA,(131)I-Macroaggregated Albumin,Serum Albumin, Radioiodinated,Albumin, Radio-Iodinated Serum,Albumin, Radioiodinated Serum,Radio-Iodinated Serum Albumin,Radioiodinated Serum Albumin,Serum Albumin, Radio Iodinated