Lönnqvist P A, Löfqvist B
Department of Paediatric Anaesthesia & Intensive Care, St. Görans Children's Hospital, Stockholm, Sweden.
Intensive Care Med. 1997 Sep;23(9):998-1001. doi: 10.1007/s001340050445.
To investigate if unexpected behaviour of neonatal and paediatric patients connected to syringe pumps could be explained by transient elevation of these devices.
Five different commercially available syringe-pumps were set at an infusion rate of 1 ml/h and then subjected to a vertical displacement manoeuvre (height 1 m). The actual delivered infusion volumes in association with the displacement manoeuvre were measured by a high precision weight scale connected to a computer.
A medical technology laboratory in a university hospital.
Elevation of the devices resulted in a rapid bolus injection of 0.19-2.28 ml. Returning the devices to their original positions resulted in an aspiration into the system of 0.06-0.34 ml. The times both for bolus injection and for aspiration into the system were less than 1 min in all cases. The updown manoeuvre was followed by a period with zero infusion ranging from 8 to 105 min.
Design flaws in the construction of syringe pumps can expose patients to substantial danger following vertical displacement if potent drugs are being infused. If potent drugs are infused, care should be taken not to change the vertical position of the syringe pump even for short periods of time. Before buying new equipment, the authors recommend that the delivery characteristics of these devices should not only be tested during ordinary bench testing but should also include the reaction to a vertical displacement manoeuvre.
调查连接到注射泵的新生儿和儿科患者的意外行为是否可由这些设备的短暂升高来解释。
将五种不同的市售注射泵设置为1毫升/小时的输注速率，然后进行垂直位移操作（高度1米）。通过连接到计算机的高精度秤测量与位移操作相关的实际输注量。
大学医院的医学技术实验室。
设备升高导致快速推注0.19 - 2.28毫升。将设备恢复到原始位置导致系统吸入0.06 - 0.34毫升。在所有情况下，推注和吸入系统的时间均少于1分钟。上下操作后有一段零输注时间，范围为8至105分钟。
如果正在输注强效药物，注射泵结构中的设计缺陷会使患者在垂直位移后面临重大危险。如果输注强效药物，即使在短时间内也应注意不要改变注射泵的垂直位置。在购买新设备之前，作者建议这些设备的输送特性不仅应在普通台架测试期间进行测试，还应包括对垂直位移操作的反应。
