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- What is the allowed time window for shipping cord blood to the lab?
- Public cord blood banks throughout the world have adopted a time window of 48 hours as the maximum delay from birth to the initiation of lab processing. It would be a "best practice" if family banks also followed the 48 hour window.
Some data points:
- FACT accreditation standards require the 48 hour window for public donations but allow 72 hours for family banks.
- AABB accreditation standards do not specify a time window.
- The US FDA recommends the 48 hour window.
- The US state of NY Dept. of Health requires a 48 hour window.
- Why is it important to ship cord blood with a special courier?
The Parent's Guide to Cord Blood Foundation recommends shipping with a courier that has a division specializing in "Life Sciences" transport. This helps to insure that your critical shipment is not misplaced, arrives promptly, and is maintained within the acceptable temperature range during transport from the hospital to the lab.
The first priority for parents to consider is the cord blood shipping time: Once the cord blood is harvested, the blood cells and stem cells gradually begin to die. Public cord blood banks set a limit of 48 hours on the time between birth and processing the blood for cryogenic storage. It would be a "best practice" if family banks also followed the 48 hour window.
The second priority for parents to consider is the cord blood shipping temperature: The standard procedure for transporting fresh cord blood is to keep it within an ambient temperature range of 15 °C (59 °F) to 25 °C (77 °F). Priority shipping services may guarantee the arrival time, but not the temperature conditions during transit. The cord blood might get too hot or too cold while sitting in the back of a truck, on a loading dock, or in the cargo hold of an airplane. A specialty courier with Life Sciences expertise will carry the cord blood in a controlled environment.
Parents can improve the survival of their child's cells during transit to the cord blood laboratory by selecting a family bank that provides a well insulated shipping container and that provides a specialty courier who maintains the shipment within the desired temperature range. In many countries it is standard practice for the shipping container to have a temperature logger.
In the United States, the post 9/11 security requirements of the Transportation Security Administration (TSA) require that specialty couriers can only offer cord blood shipping through those cord blood banks that are registered with the TSA as a "Known Shipper". Before 9/11, specialty couriers could market their services directly to consumers, and in some countries this is still possible. Parents should check if a Family Bank offers specialty courier services before they sign a contract.
- What is HLA Type and how is it used?
The term "HLA" is short for Human Leukocyte Antigens, and these are proteins in the immune system that determine whether a patient will react against a donor transplant. A very good basic tutorial about HLA types is on the Stanford Website, and the national Be The Match program (aka NMDP) has more info on the role of HLA type in transplants of stem cells from bone marrow or cord blood.
Briefly, there are 6 HLA types that are important for stem cell transplants: in a bone marrow transplant the patient and donor must match at all 6 (100% match), whereas a cord blood transplant is just as effective at curing patients with only a 4 out of 6 match (67% match) between donor and patient. This is the reason that donations to the national cord blood inventory managed by NMDP are so important to help patients who come from minority or mixed racial backgrounds.
The HLA type of cord blood is always measured by public banks, and then the type is listed on a registry that can be searched by patients seeking a transplant. Family banks typically do not measure the HLA type at the time of banking, because it is an expensive lab test and and can always be checked later from a testing segment of the stored cells.