Abstract

Abstract Introduction The post-operative monitoring of free-flaps can be a challenge, particularly for junior staff on-call and in patients with darker or mottled skin. We present a case employing paediatric pulse oximetry to monitor a free flap where clinical assessment was challenging, illustrating its value as an adjunct to existing techniques such as doppler. Case A 23-year-old patient underwent tenolysis to his anterior right leg compartment due to a painful, tethered scar following injury. He subsequently had a superficial circumflex iliac perforator (SCIP) flap anastomosed end-to-side to his posterior tibial artery. The operation was technically challenging, but the flap had a strong doppler and remained clinically well until day 4 post-op, where it became mottled but remained warm and soft. Clinical assessment was equivocal, and a paediatric pulse oximeter was taped to the flap, consistently showing saturations >95%, providing reassurance out-of-hours and facilitating the decision to delay haematoma evacuation for the following day. The flap survived and the patient did well. Conclusions The use of paediatric pulse oximetry to assess free flaps is a useful technique for clinically ambiguous cases where re-exploration could compromise survival. It is cheap, widely accessible and can be easily employed by junior clinicians and nurses who may be relatively inexperienced in their assessment of flaps’ clinical condition.

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