Carabini Louanne M, Nouriel Jacob, Milian Ricardo Diaz, Glogovsky Erin R, McCarthy Robert J, Handler Thomas G, Ault Michael L
Northwestern Medicine, Department of Anesthesiology, Northwestern University Feinberg School of Medicine, Chicago, IL
Wayne State University School of Medicine, Detroit, MI.
Respir Care. 2016 Oct;61(10):1311-5. doi: 10.4187/respcare.04809. Epub 2016 Sep 6.
A pneumatic tube system (PTS) is a cost-effective, rapid transport modality that utilizes induced pressure changes. We evaluated the clinical importance of 2 transport modalities, human courier and PTS, for blood gas specimens.
Following open heart surgery, 35 simultaneous pairs of arterial and venous blood gas specimens were analyzed from 20 subjects. Of each pair, one specimen was transported to the blood gas laboratory via a human courier and the other via a SwissLog PTS. Transport modalities were compared using the Bland-Altman limits of agreement method.
Compared with the walked specimen, the bias for PaO2 was -8.0 mm Hg (95% CI, -40.0 to 24.5 mm Hg); PaCO2 , -0.94 mm Hg (95% CI, -3.76 to 1.86 mm Hg); PvO2 , -0.60 mm Hg (95% CI, -6.90 to 5.70 mm Hg); PvCO2 , -0.58 mm Hg (95% CI, -3.12 to 1.92 mm Hg) for the PTS specimen.
The difference in the PO2 and PCO2 of paired (walked vs tubed) arterial and venous blood gas specimens demonstrated a slight bias. PaO2 values demonstrated the greatest bias, however not clinically important. Thus, PTS transport does not impact clinical interpretations of blood gas values.
气动管道系统（PTS）是一种利用感应压力变化的经济高效、快速的运输方式。我们评估了两种运输方式，即人工递送和气动管道系统，对血气标本的临床重要性。
在心脏直视手术后，对20名受试者的35对同时采集的动脉和静脉血气标本进行分析。每对标本中，一个标本由人工递送至血气实验室，另一个通过瑞士罗技气动管道系统运输。使用Bland-Altman一致性界限方法比较运输方式。
与步行递送的标本相比，气动管道系统标本的PaO2偏差为-8.0 mmHg（95%CI，-40.0至24.5 mmHg）；PaCO2为-0.94 mmHg（95%CI，-3.76至1.86 mmHg）；PvO2为-0.60 mmHg（95%CI，-6.90至5.70 mmHg）；PvCO2为-0.58 mmHg（95%CI，-3.12至1.92 mmHg）。
配对（步行递送与管道运输）的动脉和静脉血气标本的PO2和PCO2差异显示出轻微偏差。PaO2值偏差最大，但在临床上并不重要。因此，气动管道系统运输不会影响血气值的临床解读。
