Venous return in hemorrhagic shock after application of Military Anti-Shock Trousers
| Autor: | Walter H. Massion, Howard R. Lee, Robert J. Wilder, William F. Blank, Paula Downs |
|---|---|
| Rok vydání: | 1983 |
| Předmět: |
Cardiac output
Military anti-shock trousers Blood Pressure Gravity Suits Vena Cava Inferior Shock Hemorrhagic Inferior vena cava Veins Blood Transfusion Autologous Dogs Hypovolemia medicine Animals Cardiac Output business.industry General Medicine Blood flow Blood pressure medicine.vein Shock (circulatory) Anesthesia Emergency Medicine Vascular Resistance medicine.symptom business Venous return curve |
| Zdroj: | The American Journal of Emergency Medicine. 1:7-11 |
| ISSN: | 0735-6757 |
| DOI: | 10.1016/0735-6757(83)90030-x |
| Popis: | The effect of Military Anti-Shock Trousers (MAST) on inferior vena cava blood flow was studied during graded hypovolemia using a pump reservoir system and an in-line electromagnetic flowprobe. During hemorrhagic shock MAST inflation increased cardiac output 25.4% (Control: 0.92 ± 0.09 l/min) and arterial pressure 50% (Control: 60 ± 2 mmHg). The socalled “autotransfusion” effect due to blood displacement from the lower part of the body into the central circulation was found to be only 4.3 ± 0.6 ml/kg, a volume much less than previously estimated in the literature. We conclude that MAST inflation reliably improves cardiac output and systemic blood pressure above the diaphragm in dogs subjected to hemorrhagic shock. This effect is mainly due to a diversion of the cardiac output to the upper half of the body due to impedance of flow to the abdomen and lower extremities, rather than to a significant volume shift constituting an autotransfusion of blood from the lower part of the body. |
| Databáze: | OpenAIRE |
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