Autohaem: 3D printed devices for automated preparation of blood smears

Samuel McDermott, Jaehyeon Kim, Aikaterini Anna Leledaki, Duncan Parry, Louis Lee, Alexandre Kabla, Catherine Mkindi, Richard Bowman, Pietro Cicuta

Research output: Contribution to journalArticlepeer-review

Abstract

The process of making blood smears is common in both research and clinical settings for investigating the health of blood cells and the presence of blood-borne parasites. It is very often carried out manually. We focus here on smears for malaria diagnosis and research, which are frequently analyzed by optical microscopy and require a high quality. Automating the smear preparation promises to increase throughput and to improve the quality and consistency of the smears. We present here two devices (manual and motorized) designed to aid in the making of blood smears. These are fully documented, open-source hardware, and an important principle was to make them easily fabricated locally anywhere. Designs and assembly instructions are freely available under an open license. We also describe an image analysis pipeline for characterizing the quality of smears and use it to optimize the settings and tunable parameters in the two devices. The devices perform as well as expert human operators while not requiring a trained operator and offering potential advantages in reproducibility and standardization across facilities.

Original languageEnglish
Article number014104
JournalReview of Scientific Instruments
Volume93
Issue number1
Early online date18 Jan 2022
DOIs
Publication statusPublished - 31 Jan 2022

ASJC Scopus subject areas

  • Instrumentation

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