The Bag-Sealer™ Probe is designed for use with a LogTag TREX-8 temperature recorder. The probe prevents leakage while measuring the internal temperature of a blood bag.
The Bag-Sealer Probe was developed by William Laboratories specifically for insertion through a blood bag port without letting bag fluid leak out during validation. The probe has a 1.5 meter (5 ft.) cable length. The probes and temperature recorders are calibrated as matched set.
During the development of the Val-A-Sure™ Cooler Validation Kit, we identified the need for a temperature probe that could be inserted into a blood bag. It was crucial that the probe we supplied with the Validation Kit not permit liquid to leak from a blood bag, whether it was a glycerol-water mix or a blood product.
Manufacturer-supplied probes, with the temperature recorders we tested, were all found to be inadequate in one of several ways:
- the probe came with a sharpened tip for piercing a surface that easily (and quite readily) punctured the side of a blood bag after it was inserted through a bag port;
- the probe was too thin and did not provide a complete seal around it after insertion into a blood bag, with the result that liquid to leaked from blood bags;
- the larger diameter probes were very difficult to insert into a blood bag.
Given that our test users wanted both non-probe and probe temperature recorders, we needed to come up with a probe that:
- could be inserted into a blood bag without piercing a side wall after insertion through a bag port
- could be fairly easily inserted
- would not permit leakage of bag fluid around the probe
We solved the customer requirements by designing a custom probe and providing glycerol lubricant to permit relatively easy insertion into a blood bag, while also acting as a seal around the probe.
Regulations require annual calibration of temperature-measuring devices.