Endoscope unit

摘要

An endoscope unit includes an endoscope (10) having an insertion portion (12) and a fluid supply instrument (20) mounted on the insertion portion. The fluid supply instrument comprises a thin resilient tube (23). This resilient tube is intimately attached to an outer periphery of the insertion portion of the endoscope and radially expansible. A supply member (21) is connected to a basal end of the resilient tube (23). When fluid from this supply member is supplied to the basal end of the resilient tube, the resilient tube is radially expanded and a fluid passage (29) is formed between the resilient tube and the insertion portion of the endoscope. The fluid is discharged from a distal end of the resilient tube. <IMAGE>