Measurement of blood flow in minute volumes of specific tissues in man

Stow, Richard W.; Schieve, James F.

doi:10.1152/jappl.1959.14.2.215

Cited by 22 publications

(7 citation statements)

References 0 publications

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“…This traumatic method has not been validated by others. An identical principle was previously developed by Stow and Schive (1959).…”

Section: Discussionmentioning

confidence: 99%

“…Heat has previously been used for measuring blood flow rate in skin and muscles (Stow & Schive, 1959;Per1 & Cucinell, 1965;Hensel & Brandt, 1977;Adams etal., 1980;Gibbs, 1933;Corcoran et al, 1987), however, so far the only quantitative, atraumatic method capable of measuring cutaneous blood flow rate has been the 133Xe-washout method (Sejrsen, 1969;1971), which measures cutaneous and subcutaneous blood flow rate after curve resolution. It is not possible to obtain quantitative measurements of blood flow rate in arteriovenous anastomoses by 133Xe, as it is not possible to obtain equilibrium of 133Xe between tissue and blood, due to the large diameter of the arteriovenous anastomoses (around 50 pm compared to around 7 pm for capillaries).…”

Section: Introductionmentioning

confidence: 99%

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Heat‐washout: a new method for measuring cutaneous blood flow rate in areas with and without arteriovenous anastomoses

Midttun

Sejrsen

Colding‐Jørgensen

1996

Clinical Physiology

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A new method, the heat-washout method, for measuring total cutaneous blood flow rate is introduced. The measurements were performed with a transcutaneous (tc) PO2-electrode that is capable of heating and measuring local temperature, and it is constructed with a thermostatically controlled cap. The probe was heated electrically to a selected temperature 2-10 degrees above normal skin temperature. When the temperature was stable, the heating element was turned off, and the temperature was registered every 10 s until a stable baseline temperature, Tb, was obtained. Tb was subtracted from the registered temperatures giving deltaTs that were plotted in a semilogarithmic diagram. The heat-washout was monoexponential, and the slope was used for calculating blood flow rate in accordance with the principle of Kety, using a known partition coefficient. The method was applied to the forearm in two subjects, and the results were compared to blood flow rates obtained simultaneously by the 133Xe-washout method in the same area. The equation of the regression line was y = 2.5 + 0 x 968X and the correlation coefficient was 0 x 986 at temperature levels of 37-45 degrees C. In the pulp of the thumb, blood flow rates, in arteriovenous anastomoses, were estimated in two subjects by subtracting the capillary blood flow rate, measured by 133Xe-washout, from the total cutaneous blood flow rate, measured by heat-washout. Due to a relatively low diffusions coefficient for 133Xe compared to heat, 133Xe cannot be used for measurement of blood flow rate in arteriovenous anastomoses.

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“…This traumatic method has not been validated by others. An identical principle was previously developed by Stow and Schive (1959).…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Heat‐washout: a new method for measuring cutaneous blood flow rate in areas with and without arteriovenous anastomoses

Midttun

Sejrsen

Colding‐Jørgensen

1996

Clinical Physiology

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“…A 2F thermistor catheter could be readily inserted through a peripheral vein and advanced so that its tip is in an axillarysubclavian or femoral-external iliac vein. In strumentation is available at low cost to mea sure temperature with an accuracy of 10-3 °C [18].…”

Section: Discussionmentioning

confidence: 99%

Relationship between Peripheral Blood Flow and Blood Temperatures in Lambs during Hypoxemia and Hemorrhage

Simbruner¹,

Rudolph²

1982

Neonatology

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The relationships between the peripheral blood flow and arterial and venous blood temperatures were examined in 5 lambs (mean weight 10.5 kg, 4–12 weeks old) during hypoxemia and hemorrhage. Blood flow to one hind limb was measured continuously with an electromagnetic flow transducer around the femoral artery. Aortic and venous blood temperatures were monitored by means of thermistor catheters in the descending aorta and iliac vein. The intravascular catheters and flow transducer were implanted chronically and all studies were performed in conscious lambs, resting quietly. Skin temperatures were recorded at the hip and at the foot. The total heat in the hind limb (H_tot), the net heat transported by circulating blood (H_bl), and the metabolic heat produced in the hind limb were calculated. The arterial and venous blood temperature were related to peripheral blood flow. When the flow was constant over a control period, blood temperatures remained constant. Hypoxemia, produced by administering a low oxygen gas mixture to the lamb, did not alter femoral blood flow, nor did it affect vascular temperatures. During hemorrhage, femoral blood flow fell, aterial temperature rose by 0.46 °C and venous temperature by 0.85 °C; arteriovenous temperature difference decreased from 0.85 to 0.44 °C. There was an inverse relationship between femoral blood flow and venous temperature in each individual lamb subjected to hemorrhage, with a correlation of 0.91. For each 10-ml/min decrease in peripheral blood flow the venous temperature rose an average of 0.33 °C. Changes in peripheral blood flow were immediately reflected by changes in the venous temperature.

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“…The details of the theory and technique a r e given elsewhere. 5 Recently, Per1 and Cucinel16 have given a much more complete treatment of the theory.…”

Section: Thevmal Transients From Abrupt Occlusionmentioning

confidence: 99%