Changes in Pulmonary Vascular Volumes after Induced Intravascular Aggregation of Blood Platelets
| Autor: | P. Aarseth, Jarle Vaage, I. Enge, J. Hognestad |
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| Rok vydání: | 1974 |
| Předmět: |
Chromium
Pulmonary Circulation medicine.medical_specialty Capillary pressure Erythrocytes Time Factors Physiology Vascular volume Pulmonary Artery Distension Internal medicine medicine Animals Platelet Cardiac Output Serum Albumin Radio-Iodinated Pneumonectomy Lung Blood Volume CATS Chemistry Microcirculation Osmolar Concentration Angiography Blood Proteins Fluid compartments Disseminated Intravascular Coagulation Pulmonary Alveoli Anesthesia Cats Cardiology Vascular Resistance Collagen medicine.symptom Vasoconstriction |
| Zdroj: | Acta Physiologica Scandinavica. 92:84-94 |
| ISSN: | 1365-201X 0001-6772 |
| Popis: | The volumes of intra- and extravascular fluid compartments in lungs have been studied in cats after intravascular aggregation of blood platelets induced by collagen infusions. Such infusions give marked pulmonary pressor responses. A biopsy-technique with removal of isolated lobes after isotopelabelling of the blood, indicated an increased vascular volume during the response to a collagen-infusion, while the extravascular water content remained unchanged. Angiographic observations revealed that the increased vascular volume is due to distension of large arteries, while the veins have a somewhat reduced dimension. These findings are interpreted as being caused by a precapillary vasoconstriction, no marked changes on capillary pressure, and with passive arterial dilatation upstreams to the constricted segments. Venous narrowing might be active or due to some passive recoil. |
| Databáze: | OpenAIRE |
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