초록 ▼

The present invention relates to catheters and like devices for passage into a body cavity. In the invention the device has a stem portion comprising at least a first tube disposed within a second tube, the tubes being joined at one pair of ends by a flexible member covering the opening of the passa

The present invention relates to catheters and like devices for passage into a body cavity. In the invention the device has a stem portion comprising at least a first tube disposed within a second tube, the tubes being joined at one pair of ends by a flexible member covering the opening of the passage formed between the inner tube and the outer tube. The flexible member is arranged such that the tubes are movable relative to each other and by movement of the inner tube away from or towards the one end of the outer tube the flexible member respectively either can be drawn within the adjacent one end of the outer tube to be enclosed within the outer tube or pushed outside the adjacent one end of the outer tube to expose a balloon. The balloon can be inflated within the body cavity using a fluid under pressure supplied to the balloon from outside the body through said passage. This is a continuation of application Ser. No. 918,506, filed Oct. 14, 1986, now abandoned, which is a continuation of Ser. No. 617,998, filed May 31, 1984, now abandoned.

대표청구항 ▼

A self-supporting catheter device for passage into a body cavity through a natural or surgical opening in the body, said device comprising: a one-piece stem section having primary and secondary ends, being formed from one continuous flexible member comprising: concentric inner and outer tube portion

A self-supporting catheter device for passage into a body cavity through a natural or surgical opening in the body, said device comprising: a one-piece stem section having primary and secondary ends, being formed from one continuous flexible member comprising: concentric inner and outer tube portions having respective first and second ends, said inner tube portion having an interior passage and having an external diameter that is smaller than the internal diameter of said outer tube portion, thereby providing an annular passage between said inner tube portion and said outer tube portion and permitting the relative movement thereof, wherein said respective tube portions are each of a length permitting passage of said device into a body cavity, and an inflatable end wall portion closing the space formed between said respective first ends of said inner tube portion and said outer tube portion, and covering said annular passage at said primary end, said inflatable end wall portion permitting axial movement of said inner tube portion relative to said outer tube portion, whereby axial movement of said inner tube portion relative to said outer tube portion in the direction of said secondary stem end draws said inflatable end wall portion to within said outer tube portion, and movement of said inner tube portion relative to said outer tube portion in the direction of said primary stem end pushes said inflatable end wall portion outside of said outer tube portion, and whereby said inflatable end wall portion can be inflated to a larger dimension, within the body cavity, by supply of a fluid to said annular passage, while maintaining access to the body via said primary passage.