Brief Report

Effect of delayed sample draw after blood collection for haemoglobin test in South Korea

Hyerim Kim, Jongmin Kim
African Journal of Laboratory Medicine | Vol 12, No 1 | a2008 | DOI: https://doi.org/10.4102/ajlm.v12i1.2008 | © 2023 Hyerim Kim, Jongmin Kim | This work is licensed under CC Attribution 4.0
Submitted: 08 July 2022 | Published: 28 March 2023

About the author(s)

Hyerim Kim, Department of Laboratory Medicine, Pusan National University Hospital, Busan, Republic of Korea
Jongmin Kim, Department of Laboratory Medicine, Pusan National University Hospital, Busan, Republic of Korea, Korea, Republic of

Abstract

Between April and May 2022, 10 healthy adult non-patients were recruited from Pusan National University Hospital. Venous blood drawn into a syringe was transferred into test tubes with a zero-to-45-minute delay. The transfer was done sequentially in two positions with the syringe and the needle adaptor end (1) heading downwards and (2) heading upwards. Haemoglobin levels gradually increased over time in position 1 transfer while they gradually decreased in position 2. Therefore, blood must be transferred quickly from a syringe to a tube for reliable test results.

What this study adds: Our findings confirm that delays between blood collection and transfer can affect haemoglobin levels.


Keywords

haemoglobin; blood specimen collection; erythrocyte count; specimen handling; phlebotomy

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