An interview on ABC Brisbane 612
Dr Kenneth Cutbush was interviewed by Katherine Feeney on ABC Brisbane 612 about limb replantation, following a shark attack in which a surfer lost a leg. The leg later washed up on the beach, which raised the question of whether replantation might be possible.
First aid at the scene
An off-duty police officer applied a dog leash as a tourniquet at the scene. Control of catastrophic bleeding is the single most time-critical intervention in an injury of this kind, and an improvised tourniquet applied promptly can be decisive.
A tourniquet works by compressing the limb firmly enough above the injury to stop arterial blood reaching it. The principle is simple and the equipment does not have to be purpose-made, which is why belts, straps and, in this case, a dog leash have all been pressed into service. The first priority in a major limb injury is the person rather than the limb, and bleeding is what threatens the person.
What replantation involves
Replantation of a severed limb is a demanding procedure that depends on a number of factors largely outside anyone's control: how cleanly the limb was severed as opposed to crushed or torn, how long it has been separated, how it was preserved in the interim, the condition of the blood vessels and nerves, and the patient's overall state. It is not possible in every case, and the decision is made on the circumstances of the individual injury.
Technically, replantation is microsurgery. Bone is stabilised first, then arteries and veins are repaired under magnification so that blood can flow into and out of the limb again, and nerves and tendons are reconstructed so that the limb may eventually move and feel. A clean cut leaves tissue that can be joined, whereas a crushing or tearing injury damages vessels and nerves well beyond the obvious wound. A limb separated from its blood supply also accumulates damage in muscle and other tissues while it is detached, and cooling it slows that process, which is why how a limb was preserved before it reached hospital carries so much weight in the decision. Individual results vary.
Note
This interview concerned a publicly reported incident and was given as general commentary. No individual's clinical details or treatment outcome are reported here.