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Original Research

Open Access

Use of convalescent plasma in the treatment of critically ill COVID-19 patients: a study protocol

  • Amar Ibrahim Omer Yahia1,2
  • Abubakar Mohammed Jibo3
  • Ahmed Yahia Alameer4,5
  • Elhadi Ibrahim Miskeen6
  • Hatim Khalifa Karar7

1Unit of Pathology, Department of Basic Medical Sciences, College of Medicine, University of Bisha, 61922 Bisha, Saudi Arabia

2Department of Pathology and Laboratory Medicine, King Abdullah Hospital, 67713 Bisha, Saudi Arabia

3Department of Community Medicine, College of Medicine, University of Bisha, 61922 Bisha, Saudi Arabia

4Department of Surgery, College of Medicine, University of Bisha, 61922 Bisha, Saudi Arabia

5Department of Surgery, King Abdullah Hospital, 67713 Bisha, Asir, Saudi Arabia 6Department of Obstetrics and Gynaecology, College of Medicine, University of Bisha, 61922 Bisha, Saudi Arabia

6Department of Hematology and Blood Transfusion Medicine, King Abdullah Hospital, 67713 Bisha, Saudi Arabia

DOI: 10.22514/sv.2021.214

Submitted: 13 July 2021 Accepted: 06 August 2021

Online publish date: 29 September 2021

*Corresponding Author(s): Amar Ibrahim Omer Yahia E-mail:


Use of convalescent plasma (CP) has shown promising results during early studies of COVID-19 patients. This study aims to prepare a protocol for the use of CP to treat critically ill COVID-19 patients. This will be a multicentre, double-blinded, controlled randomised trial. Subjects will be randomly assigned to the treatments, and evaluations will be taken at baseline and at intervals according to the protocol. Only those subjects who meet all inclusion criteria will be enrolled in the study. The experimental treatment group will receive CP at volume of 6 mL/kg divided into two doses separated by 24 hours, in addition to the standard treatment for COVID-19. The control group will receive only the standard treatments. The result assessed at the end of this trial will be the primary and secondary endpoints. The primary endpoints (efficacy indicators) will be the discharge from the ICU, discharge from the hospital, days of hospitalisation, days on mechanical ventilation and death. The main secondary endpoints (safety indicators) will be the severe transfusion reactions and transfusion-transmitted diseases. The authors developed the study protocol using standardised criteria for the development of a clinical trial protocol. This study protocol addressed all aspects that are necessary for the standardised implementation of CP for the treatment of COVID-19 patients, including CP collection, administration, evaluation, and follow up.


COVID-19; Convalescent plasma; Study protocol; Efficacy; Safety

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Amar Ibrahim Omer Yahia,Abubakar Mohammed Jibo,Ahmed Yahia Alameer,Elhadi Ibrahim Miskeen,Hatim Khalifa Karar. Use of convalescent plasma in the treatment of critically ill COVID-19 patients: a study protocol. Signa Vitae. 2021.doi:10.22514/sv.2021.214.


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