McAtamney D, O'Hare C, Fee J P
Department of Anaesthetics, Queen's University of Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK.
Anaesthesia. 1999 Jul;54(7):664-9. doi: 10.1046/j.1365-2044.1999.00892.x.
We have observed in vitro the distribution of flow from 10 identical multihole epidural catheters during continuous infusion with four different infusion pumps. The pumps chosen were the B Braun Perfusor Secura FT syringe driver and three volumetric infusion pumps utilising different pumping mechanisms (Dekra 3000 BL, Graseby 500 and CADD-Prizm). These pumps infused 0.9% saline through each catheter at 5 ml.h-1, 15 ml.h-1, 50 ml.h-1 and 99 ml.h-1 for 3 min. The number of holes through which flow occurred and the catheter hole where flow predominated during each test were recorded. The pressure waveform generated during each infusion was displayed and the peak pressure recorded. In 38 of the 160 tests (24%) the largest proportion of flow was seen at the hole closest to the catheter tip. The CADD pump generated multihole flow during significantly more tests (p < 0.0001) than the other pumps and produced significantly higher driving pressures (p < 0.001) at all infusion rates compared with the Graseby and Perfusor pumps. The CADD was the only pump to produce flow from all three holes of the catheter at 5 ml.h-1.
我们在体外观察了10根相同的多孔硬膜外导管在使用四种不同输液泵持续输注期间的血流分布情况。所选的泵为贝朗Perfusor Secura FT注射器驱动器以及三种采用不同泵送机制的容积式输液泵（德克拉3000 BL、格拉塞比500和卡迪普瑞兹姆）。这些泵以5 ml.h-1、15 ml.h-1、50 ml.h-1和99 ml.h-1的速度通过每根导管输注0.9%的生理盐水，持续3分钟。记录每次测试中出现血流的孔数以及血流占主导的导管孔。显示每次输注期间产生的压力波形并记录峰值压力。在160次测试中的38次（24%）中，在最靠近导管尖端的孔处观察到最大比例的血流。与格拉塞比泵和Perfusor泵相比，卡迪泵在更多测试中（p < 0.0001）产生多孔血流，并且在所有输注速率下产生的驱动压力显著更高（p < 0.001）。卡迪泵是唯一在5 ml.h-1时能使导管的所有三个孔都产生血流的泵。
