Extending the Time After Death: A Safe Way to Expand Tendon Donations

Researchers have explored a novel approach to increase the supply of tendon grafts by extending the time between a donor’s death and tissue harvest. Their findings suggest that allowing tendons to remain at controlled temperatures for up to 36 hours can maintain safety and quality, potentially expanding the pool of usable donations.

Key Findings

• Bacterial Safety
  Tendons stored for extended periods—up to 36 hours after death—remained free from harmful bacteria, even when kept at warmer temperatures. This indicates that contamination is not a significant concern in delayed harvesting.

• Cartilage‑Like Marker Stability
  The chemical marker indicating the presence of cartilage-like material stayed within normal levels throughout the extended storage period, confirming that tissue composition remains stable.

• Collagen Degradation at Warm Temperatures
  Warm storage led to a noticeable decline in collagen, the protein responsible for tensile strength. This degradation made tendons more watery and porous, potentially affecting their performance during surgery.

• Cooling Mitigates Collagen Loss
  Cooling the tendons preserved collagen integrity for an additional 12 hours beyond the typical safe limit. Consequently, cooled tendons maintained their mechanical properties longer than warm ones.

Practical Implications

• Extended Harvest Window
  The study supports allowing tendons to sit up to 12 hours longer than current protocols, especially when kept cool. This could increase the number of viable donations without compromising safety or mechanical soundness.

• Temperature Control is Crucial
  Maintaining a cooler environment during storage preserves collagen and ensures that tendons remain structurally sound for surgical use.

Conclusion

By extending the harvest window and employing temperature control, medical facilities can potentially double the availability of tendon grafts. This approach maintains both safety and quality, offering a promising strategy to meet the growing demand for tendon transplants.