Cold-Stored Platelets Last 3X Longer, Study Finds

Blood banks could soon keep lifesaving platelets three times longer without losing their power to stop bleeding, thanks to a breakthrough study from Australian researchers.

Dr. James Preuss and Dr. Warren Pavey from The University of Western Australia tested a simple idea with massive implications: What if we just refrigerated platelets instead of keeping them at room temperature? For over 50 years, hospitals have stored these vital blood components at room temperature because scientists believed cold storage damaged their effectiveness. That assumption just got overturned.

The team studied platelets used in cardiac surgery and found cold-stored versions worked just as well as room-temperature ones. Patients receiving refrigerated platelets that had been stored for up to 21 days showed no difference in bleeding outcomes or complications compared to those who received standard platelets stored for only 7 days.

This matters because current storage limits create a constant supply headache. Platelets stored at room temperature must be thrown away after a week due to bacterial contamination risk. That short window means blood banks can only stock small amounts, leading to frequent shortages and waste when platelets expire unused.

Australia faces unique challenges with its vast distances and scattered population. Many regional hospitals struggle to maintain platelet supplies because transporting small batches across remote areas often isn't practical. People needing cardiac surgery in these areas sometimes face delays or transfers to major city centers.

The Ripple Effect

Tripling the shelf life from 7 to 21 days changes everything about platelet logistics. Hospitals in remote communities could finally stock reliable supplies without worrying about constant expiration. Blood donation centers could reduce waste while ensuring more people get the treatment they need when they need it.

The study, published in JAMA, focused specifically on cardiac surgery patients, but the implications stretch further. If cold storage works for complex heart procedures, it could revolutionize platelet use across emergency medicine, cancer treatment, and trauma care.

Dr. Preuss emphasized that extending storage time could dramatically reduce discarded platelets while creating more reliable supplies nationwide. For a country where some communities sit hundreds of miles from the nearest major hospital, that reliability could mean the difference between life and death.

The research team found zero increase in dangerous blood clots or other complications from cold-stored platelets. Safety matched effectiveness, clearing two critical hurdles for real-world implementation.

Australian health authorities will now review the findings to determine how quickly cold storage can be adopted across the national blood supply system.

A simple temperature change might soon bring cutting-edge cardiac care within reach of every Australian, no matter how far they live from the city.