A balloon catheter apparatus is used in combination with an endoscope having an insertion portion to be inserted in a body cavity. The apparatus comprises a catheter to be connected to a manipulating section, the catheter including an elongated tube through which the insertion portion is inserted, and...http://www.google.se/patents/US5078681?utm_source=gb-gplus-sharePatent US5078681 - Balloon catheter apparatus with releasable distal seal and method of operation
