Delayed Cold-Stored Platelets -PLTS-1

Summary

PLTS-1 is a multicentre, randomized, controlled, pilot trial, using a conventional, parallel group, two-armed design at 2 cardiac surgery centres in Canada. The study is designed to assess the feasibility of a future, definitive RCT to determine the non-inferiority of cold-stored platelets compared to conventional platelets with respect to hemostatic effectiveness (total number of allogeneic blood products transfused within 24 hours after CPB), as well as safety.

Conditions

• Platelets
• Bleeding
• Cardiopulmonary Bypass
• Cardiac Surgery

Interventions

BIOLOGICAL

Delayed Cold-Stored Buffy Coat Platelets

To prepare cold-stored platelets, blood banks will transition conventional room temperature platelets up to 4 days after collection (with agitation) to cold-storage (at 1-6 C without agitation) for a minimum of 1 day (24 hours) and a maximum of 10 days after collection (for a total shelf life of ≤ 14 days after collection). Thus, cold-stored platelets will be produced and stored the same way as room temperature platelets up until their transition to cold-storage, ensuring similar products differing only in storage conditions and expiration date (as cold-stored platelets will have an expiration date beyond the current 5 days for pathogen inactivated platelets or 7 days for bacterially cultured platelets). Pathogen reduced platelets will be used for the pilot study (Canada is transitioning in 2022-23 to pathogen-reduced platelets and one site has already transitioned).

BIOLOGICAL

Room Temperature Buffy Coat Platelets

Room temperature stored platelets are prepared from donor whole blood, which is centrifuged to collect the buffy coat layer containing platelets. Seven ABO matched buffy coats from male and/or female donors are pooled in 280 ml of platelet additive solution and split into a single dose after pathogen inactivation, resulting in a product with a final platelet count of approximately 1300 x 109. Pathogen inactivated platelets (shelf-life of 5 days, with recent Health Canada approval for an extension of the shelf-life to 7 days), will be used as Canada is transitioning in 2022-23 to pathogen-inactivated platelets and one site has already transitioned.

Sponsors & Collaborators

• Kingston Health Sciences Centre

  collaborator OTHER

• Canadian Blood Services

  collaborator OTHER

• University Health Network, Toronto

  lead OTHER

Principal Investigators

• Justyna Bartoszko, MD · University Health Network, Toronto

• Jeannie Callum, MD · Kingston Health Sciences Centre

Study Design

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

QUADRUPLE

Model

PARALLEL

Eligibility

Min Age

18 Years

Sex

ALL

Healthy Volunteers

No

Timeline & Regulatory

Start

2024-06-05

Primary Completion

2026-06-30

Completion

2026-12-31

Countries

• Canada

Study Locations