Niclauss Lars, Segesser Ludwig Karlvon
Department of Cardiovascular Surgery, University Hospital CHUV, CH-1011 Lausanne, Switzerland.
Interact Cardiovasc Thorac Surg. 2011 Jun;12(6):912-3. doi: 10.1510/icvts.2010.264051. Epub 2011 Mar 1.
The PulseCath iVAC 3L™ left ventricular assist device is an option to treat transitory left heart failure or dysfunction post-cardiac surgery. Assisted blood flow should reach up to 3 l/min. In the present in vitro model exact pump flow, depending on various frequencies and afterload was examined. Optimal flow was achieved with inflation/deflation frequencies of about 70-80/min. The maximal flow rate was achieved at about 2.5 l/min with a minimal afterload of 22 mmHg. Handling of the device was easy due to the connection to a standard intra-aortic balloon pump console. With increasing afterload (up to a simulated mean systemic pressure of 66 mmHg) flow rate and cardiac support are in some extent limited.
PulseCath iVAC 3L™左心室辅助装置是治疗心脏手术后暂时性左心衰竭或功能障碍的一种选择。辅助血流量应达到3升/分钟。在当前的体外模型中，根据不同频率和后负荷对精确的泵流量进行了检测。充气/放气频率约为70 - 80次/分钟时可实现最佳流量。在后负荷最小为22 mmHg时，最大流速约为2.5升/分钟。由于该装置与标准主动脉内球囊反搏控制台相连，操作简便。随着后负荷增加（直至模拟平均体循环压力达到66 mmHg），流速和心脏支持在一定程度上受到限制。
