Hug M I, Buettiker V, Cornelius A, Weiss M
Department of Anaesthesia, University Children's Hospital Zurich, Switzerland.
Anaesth Intensive Care. 2002 Jun;30(3):341-7. doi: 10.1177/0310057X0203000313.
Using 10 different infusion bag pressure pumps, indicated manometer pressures were compared with measured infusion pressures proximal to the flow-regulating device in an in vitro experiment. Flow rates delivered through the flow-regulating device were gravimetrically measured at different monitored pressure levels. Significant differences were found between manometer and measured infusion pressures among the tested pressure bagpumps (e.g. 500 ml bag volumepressurized to 300 mmHg manometerpressure: 219.6 +/- 7.8 to 407.2 +/- 2.7 mmHg). The infusion pressures were additionally affected by the vertical level of the infusion bag pump and by the volume of the infusion bag. Flow rates delivered through the flow-regulating device were directly correlated to the measured infusion pressure (r2= 0.9926). Differences inflow rates can have a considerable impact on maintaining catheter patency and avoidance of fluid overload and retrograde flushing into the central arterial circulation in neonates and small children. A simple manoeuvre using the invasive pressure transducer allows monitoring and adjustment of the infusion pressure in the clinical setting.
在一项体外实验中，使用10种不同的输液袋压力泵，将指示的压力计压力与流量调节装置近端测得的输液压力进行比较。在不同的监测压力水平下，通过重量法测量通过流量调节装置输送的流速。在测试的压力袋泵中，压力计压力和测得的输液压力之间存在显著差异（例如，500 ml袋体积加压至300 mmHg压力计压力：219.6 +/- 7.8至407.2 +/- 2.7 mmHg）。输液压力还受到输液袋泵垂直高度和输液袋体积的影响。通过流量调节装置输送的流速与测得的输液压力直接相关（r2 = 0.9926）。流速差异可能对维持新生儿和小儿的导管通畅、避免液体过载以及防止液体逆行冲入中心动脉循环产生相当大的影响。在临床环境中，使用侵入性压力传感器进行简单操作即可监测和调整输液压力。
