Merth I T, Verschragen G J, Olievier I C, De Winter P J, Quanjer P H
Department of Paediatrics, University Hospital, Leiden, The Netherlands.
J Appl Physiol (1985). 1993 Jan;74(1):470-5. doi: 10.1152/jappl.1993.74.1.470.
Details are given of two spirometers for use in neonates and infants < 12 mo old. The minimum volumes are 520 and 670 ml, respectively. The maximum volume changes that can be recorded are 250 and 450 ml, respectively. The minimal detectable volume changes are 0.4 and 0.6 ml, respectively. Rebreathing of dead space gas is prevented by a fan producing a flow of 6.2 and 10.2 l/min, respectively; 100% gas mixing after injecting a gas bolus in the two spirometers is achieved in 5.7 and 6.6 s, respectively. Resistance to airflow is 0.2 kPa.l-1.s (2 cmH2O.l-1.s) at 150 ml/s in both spirometers. The frequency response of both instruments is flat to 6 cycles/s. The instruments can be easily cleaned and are suitable for bedside measurements.
给出了两种用于12个月龄以下新生儿和婴儿的肺活量计的详细信息。最小容积分别为520毫升和670毫升。可记录的最大容积变化分别为250毫升和450毫升。最小可检测容积变化分别为0.4毫升和0.6毫升。通过分别产生6.2升/分钟和10.2升/分钟气流的风扇来防止死腔气体的重复呼吸；在两种肺活量计中注入气体团后，分别在5.7秒和6.6秒内实现100%的气体混合。两种肺活量计在150毫升/秒时的气流阻力均为0.2千帕·升⁻¹·秒（2厘米水柱·升⁻¹·秒）。两种仪器的频率响应在6次/秒以内都是平坦的。这些仪器易于清洁，适合床边测量。
