O'Meara M E, Bhatt S B, Breen D, Bennett N R
Department of Anaesthesia and Intensive Care, Chinese University of Hong Kong, Prince of Wales Hospital, Sha Tin, NT.
Anaesthesia. 1993 Mar;48(3):235-8. doi: 10.1111/j.1365-2044.1993.tb06910.x.
The Portex infant breathing/ventilation systems with 8.5 mm and 15 mm internal diameter connectors were compared with a standard T-piece which had a 15 mm connector and 22 mm internal diameter tubing. The differential pressures across each system were measured at constant fresh gas flows up to 30 l.min-1 dry air. Resistance was calculated at flows compatible with quiet respiration and peak inspiratory flow. Flow resistance of the 3.0 mm internal diameter tracheal tube in conjunction with the minilink breathing systems were similar to those previously reported for tracheal tubes alone. However, the minilink breathing system assumed a greater influence on resistance when tracheal tubes of larger internal diameter were used. It added considerably more resistance than the standard tubing. This may have a deleterious effect during spontaneous ventilation in older children.
将内径为8.5毫米和15毫米的波特克斯婴儿呼吸/通气系统与一个标准T形管进行比较，该标准T形管有一个15毫米的接头和内径为22毫米的管道。在高达30升·分钟⁻¹干燥空气的恒定新鲜气体流量下，测量每个系统的压差。在与安静呼吸和吸气峰值流量相适应的流量下计算阻力。内径为3.0毫米的气管导管与迷你型呼吸系统联合使用时的流动阻力与之前单独报道的气管导管的阻力相似。然而，当使用内径较大的气管导管时，迷你型呼吸系统对阻力的影响更大。它比标准管道增加了更多的阻力。这可能会对大龄儿童的自主通气产生有害影响。
