[Intravesical explosion during endoscopic resection. Apropos of a case]

Intravesical explosion during endoscopic resection are rare but may be devastating in effect, as shown by the case reported. The formation of explosive gas, essentially an air-hydrogen mixture, results from carbonization of tissues (particularly with the coagulation current) and the introduction of air into the bladder during manipulation of the resector. The nature of the bladder infusion liquid does not appear to play an important role. Prevention implies the use of a coagulation current of moderate power, the avoidance of air entering the bladder accidentally, and the continuous or repeated evacuation of the air bubble under the bladder vault.