Biventricular Bypass: Alternative to Univentricular Bypass and Total Artificial Heart-Bridge
| Autor: | S. M. Chilaya, N Khodeli |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
medicine.medical_specialty
Time Factors medicine.medical_treatment Biomedical Engineering Medicine (miscellaneous) Hemodynamics Bioengineering Heart Artificial Prosthesis Design law.invention Biomaterials Dogs law Blood vessel prosthesis Counterpulsation Artificial heart Internal medicine medicine Animals Assisted Circulation Asystole Perissodactyla Heart transplantation Sheep business.industry Goats Equipment Design General Medicine Blood flow medicine.disease Blood Vessel Prosthesis Transplantation Anesthesia cardiovascular system Cardiology Heart Transplantation Heart-Assist Devices business |
| Zdroj: | Artificial Organs. 15:357-362 |
| ISSN: | 1525-1594 0160-564X |
| Popis: | Left ventricular and biventricular bypasses (LVBs, BVBs) were performed in 102 experiments in sheep, goats, and donkeys. Biventricular bypass was performed in the assisted circulation mode or in the paracorporeal artificial heart bridge (PCAHB) mode when the natural heart fibrillates. During implantation of artificial ventricles instead of a heart-lung bypass, counterpulsation was used. Several types of connective conduits were developed and tested in experiments. The conduits included bifurcational connective pipes that permit "intake" of blood into artificial ventricles from atria and ventricles of the natural heart simultaneously and consequently provide effective blood flow through shunts not depending on the state of the natural heart (acute cardiac weakness or asystole). Monitoring gas content (PO2, PCO2, and pH) in the myocardium of both ventricles suggested development of right ventricular failure under conditions of LVB before hemodynamic changes occurred and confirmed the preferability of BVB over other methods of assisted circulation, as it is most effective and capable of normalizing short-term cardiac disturbances in the course of the 1st 2 days. Survival time of experimental animals (2-3 days for dogs, 5-12 days for sheep, goats, and donkeys) is sufficient to overcome acute cardiac insufficiency. This suggests that BVB in the assisted circulation mode or PCAHB mode can serve as a bridge for cardiac transplantation for the time of search for the available organ. |
| Databáze: | OpenAIRE |
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