Fibrin sealant: A novel method of fixation for an implantable ultrasonic microDoppler probe

While free tissue transfer affords the reconstructive microvascular surgeon the ability to provide coverage for complex wounds, the postoperative moni toring of these flaps continues to evolve. The most recent advance has been the development of an implantable microDoppler probe to provide an early w arning signal for vascular obstruction. The current system relies on the us e of a silicone cuff to secure a l-mm probe to the out-flow vein. The relea se force to remove the probe from the cuff is reported to be 1/10 of a poun d (45 g). A disadvantage of this system is the need for a circumferential, relatively in elastic device around the vein. Should the cuff be too tightl y secured to the vein, the potential for outflow obstruction exists. Moreov er, if the probe is not well-approximated to the vein, no signal is produce d. Finally, the fact that a foreign body remains in the wound after complet ion of the monitoring period remains a concern. The authors have investigat ed a new method to adhere the probe, using a commercially available fibrin sealant. The use of this biocompatible substance has the potential to obvia te the need for the current method of fixation, and the associated concerns .