Thrombus generation within the artificial heart
| Autor: | Jack Kolff, John Lawson, Felix Unger, W. J. Kolff, Hartmut Oster, Thomas R. Kessler, Don B. Olsen |
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| Rok vydání: | 1975 |
| Předmět: |
Pulmonary and Respiratory Medicine
medicine.medical_specialty business.industry Sharp angle medicine.disease law.invention Diaphragm (structural system) law Internal medicine Artificial heart cardiovascular system Cardiology Medicine Surgery cardiovascular diseases Thrombus Cardiology and Cardiovascular Medicine business circulatory and respiratory physiology |
| Zdroj: | The Journal of Thoracic and Cardiovascular Surgery. 70:248-255 |
| ISSN: | 0022-5223 |
| DOI: | 10.1016/s0022-5223(19)40347-4 |
| Popis: | The sites of thrombus formation in the Jarvik III artificial heart were studied in 20 consecutive calf experiments. Identical design and implantation procedures were used with two different surfaces. The 10 anticoagulated calves receiving Dacron-fibrilized silicone rubber surfaces survived an average of 296 hours. In contrast, the 10 nonanticoagulated calves with smooth polyurethane hearts survived 545 hours. The polyurethane surfaces were constantly clean. However, the rough surfaces were coated with variable amounts of thrombi. The sharp angle between the diaphragm and housing contained varying amounts of thrombi deposits in 75 per cent of the cases. Thrombi deposition occurred on 41 per cent of the valves. These thrombi were the source of emboli into the kidney, brain, and lungs. Turbulences and stagnation areas generated thrombus formation. Anticoagulation did not prevent thrombus formation. It would appear that hearts free of turbulence and stagnation areas must be designed to eliminate thromboembolism. |
| Databáze: | OpenAIRE |
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