Massey L W, Hussey J D, Albert R K
Medical Service, Veterans Administration Medical Center, Seattle, Washington 98108.
Am Rev Respir Dis. 1988 Jan;137(1):204-5. doi: 10.1164/ajrccm/137.1.204.
After documenting that the measured flow from a portable liquid oxygen device was different from the set flow and that this difference caused hypoxemia in a patient with chronic obstructive pulmonary disease, we compared the measured and set flows from 23 portable devices supplied by 2 different providers. Nine of 13 devices (69%) from Provider A gave measured flows that differed from the set flows at 14 of 65 (21%) settings (13 devices times 5 flow settings). Three of 10 devices (30%) supplied by Provider B gave measured flows that differed from the set flow in only 5 of 50 (10%) possible settings (10 units times 5 flow settings). Oxygen delivery may be inaccurate from portable liquid systems serviced by some suppliers. This problem may cause patients to become hypoxemic despite using the devices in the prescribed fashion.
在记录到一台便携式液氧设备的实测流量与设定流量不同，且这种差异导致一名慢性阻塞性肺疾病患者出现低氧血症后，我们比较了由两家不同供应商提供的23台便携式设备的实测流量和设定流量。供应商A提供的13台设备中有9台（69%）在65个（21%）设置点中的14个（13台设备乘以5个流量设置）实测流量与设定流量不同。供应商B提供的10台设备中有3台（30%）仅在50个（10%）可能设置点中的5个（10台设备乘以5个流量设置）实测流量与设定流量不同。一些供应商提供服务的便携式液体系统可能存在氧气输送不准确的问题。尽管患者按规定方式使用这些设备，但这个问题可能会导致患者出现低氧血症。
