Volume 63, Issue 9 pp. 1649-1660
TRANSFUSION MEDICINE

A randomized cross-over study of cryopreserved platelets in prophylactic transfusions of thrombocytopenic patients

Ai Leen Ang

Corresponding Author

Ai Leen Ang

Department of Hematology, Singapore General Hospital, Singapore

Blood Services Group, Health Sciences Authority, Singapore

Correspondence

Ai Leen Ang, Department of Hematology, Singapore General Hospital, Singapore.

Email: [email protected]

Search for more papers by this author
Linda Seo Hwee Gan

Linda Seo Hwee Gan

DSO National Laboratories, Singapore

Search for more papers by this author
Tertius Tansloan Tuy

Tertius Tansloan Tuy

Department of Hematology, Singapore General Hospital, Singapore

Search for more papers by this author
Chieh Hwee Ang

Chieh Hwee Ang

Department of Hematology, Singapore General Hospital, Singapore

Search for more papers by this author
Chuen Wen Tan

Chuen Wen Tan

Department of Hematology, Singapore General Hospital, Singapore

Search for more papers by this author
Hwee Huang Tan

Hwee Huang Tan

Blood Services Group, Health Sciences Authority, Singapore

Search for more papers by this author
Pei Huey Shu

Pei Huey Shu

Blood Services Group, Health Sciences Authority, Singapore

Search for more papers by this author
Qingxiang Zhang

Qingxiang Zhang

DSO National Laboratories, Singapore

Search for more papers by this author
Yang Cao

Yang Cao

Singapore Clinical Research Institute, Singapore

Search for more papers by this author
Rajesh Babu Moorakonda

Rajesh Babu Moorakonda

Singapore Clinical Research Institute, Singapore

Search for more papers by this author
Yogesh Pokharkar

Yogesh Pokharkar

Singapore Clinical Research Institute, Singapore

Search for more papers by this author
Jia Lu

Jia Lu

DSO National Laboratories, Singapore

Search for more papers by this author
First published: 19 August 2023

Abstract

Background

The short shelf-life of liquid-stored platelets (LP) at 20–24°C poses shortage and wastage challenges. Cryopreserved platelets have significantly extended shelf-life, and were safe and efficacious for therapeutic transfusions of bleeding patients in the Afghanistan conflict and phase 2 randomized studies. Although hematology patients account for half of platelets demand, there is no randomized study on prophylactic cryopreserved platelet transfusions in them.

Methods

We performed a phase 1b/2a randomized cross-over study comparing the safety and efficacy of cryopreserved buffy coat-derived pooled platelets (CP) to LP in the prophylactic transfusions of thrombocytopenic hematology patients.

Results

A total of 18 adults were randomly assigned 1:1 to CP and LP for their first thrombocytopenic period (TP) of up to 28-days. A total of 14 crossed over to the other platelet-arm for the second TP. Overall, 17 subjects received 51 CP and 15 received 52 LP. CP-arm had more treatment emergent adverse event (29.4% vs. 13.3% of subjects, 9.8% vs. 3.8% of transfusions) than LP-arm but all were mild. No thromboembolism was observed. Both arms had similar bleeding rates (23.5% vs. 26.7% of subjects) which were all mild. Subjects in CP-arm had lower average corrected count increments than LP-arm (mean [SD] 5.6 [4.20] vs. 22.6 [9.68] ×109/L at 1–4 h, p < .001; 5.3 [4.84] vs. 18.2 [9.52] ×109/L at 18–30 h, p < .001). All TEG parameters at 1–4 h and maximum amplitude (MA) at 18–30 h improved from baseline post-CP transfusion (p < .05) though improvements in K-time and MA were lower than LP (p < .05).

Discussion

During shortages, CP may supplement LP in prophylactic transfusions of thrombocytopenic patients.

CONFLICT OF INTEREST STATEMENT

The authors have disclosed no conflicts of interest.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.