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Licensed Unlicensed Requires Authentication Published by De Gruyter February 15, 2022

Investigation of the effects of pneumatic tube transport system on routine biochemistry, hematology, and coagulation tests in Ankara City Hospital

Emine F. Yurt, Filiz Akbiyik and Cemile Bicer



Academics are far from a consensus regarding the effects of pneumatic tube system (PTS) delivery on sample integrity and laboratory test results. As for the reasons for conflicting opinions, each PTS is uniquely designed, sample tubes and patient characteristics differ among studies. This study aims to validate the PTS utilized in Ankara City Hospital for routine chemistry, coagulation, and hematology tests by comparing samples delivered via PTS and porter.


The study comprises 50 healthy volunteers. Blood samples were drawn into three biochemistry, two coagulation, and two hemogram tubes from each participant. Each of the duplicate samples was transferred to the emergency laboratory via Swiss log PTS (aka PTS-immediately) or by a porter. The last of the biochemistry tubes were delivered via the PTS, upon completion of coagulation of the blood (aka PTS-after). The results of the analysis in these groups were compared with multiple statistical analyses.


The study did not reveal any correlation between the PTS and serum hemolysis index. There were statistically significant differences in several biochemistry tests. However, none of them reached the clinical significance threshold. Basophil and large unidentified cell (LUC) tests had poor correlations (r=0.47 and r=0.60; respectively) and reached clinical significance threshold (the average percentages of bias, 10.2%, and 15.4%, respectively). The remainder of the hematology and coagulation parameters did not reach clinical significance level either.


The modern PTS validated in this study is safe for sample transportation for routine chemistry, coagulation, and hematology tests frequently requested in healthy individuals except for basophil and LUC.

Corresponding author: Emine F. Yurt, Medical Biochemistry, Adilcevaz Oncology Hospital, Bitlis, Turkey, E-mail:

Funding source: Siemens Healthineers (Ankara City Hospital, TURKEY)


Many thanks to Siemens Healthineers (Ankara, Turkey) for supplying the sample tubes and analyzing the laboratory tests free of charge.

  1. Research funding: Siemens Healthineers (Ankara City Hospital, TURKEY) supplied the sample tubes and the laboratory tests analysis free of charge. It has no benefit or interest from this study.

  2. Author contributions: All authors have accepted responsibility for the entire content of this manuscript and approved its submission.

  3. Competing interests: Authors state no conflict of interest.

  4. Informed consent: Informed consent was obtained from all individuals included in this study.

  5. Ethical approval: This study was approved by the Ankara Yildirim Beyazit University Ethics Board (Date, 17.07.2019; Decision number, 83).


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Supplementary Material

The online version of this article offers supplementary material (

Received: 2021-11-25
Accepted: 2022-02-02
Published Online: 2022-02-15
Published in Print: 2022-04-26

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