Method of forming a gastrointestinal tube
US4100246A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 21, 1976 |
| Grant date | Jul 11, 1978 |
| Priority date | — |
| Expiry date | Jun 21, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S264/71
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
In accordance with a preferred embodiment of this invention, there is provided a new and improved method of forming a four-lumen gastrointestinal tube. This tube may be characterized as having two lumens which extend nearly the full length of the tube and two lumens which extend through only a portion of the tube. The subject method comprises the steps of: (1) extruding a three-lumen sleeve portion wherein one of the lumens is an insert carrying lumen and the remaining two lumens, in the final gastrointestinal tube assembly, are those lumens which extend the full length of the tube; (2) extruding a two-lumen insert portion, the lumens of which in the final gastrointestinal tube assembly, extend the full length of the assembly, and wherein the external dimensions of the insert portion are slightly larger than the internal dimensions of the insert carrying lumen of the sleeve portion; (3) immersing the sleeve portion in a solvent, preferably chlorothene, to cause it to swell until the internal dimensions of the insert carrying lumen are slightly larger than the external dimensions of the two-lumen insert portion; (4) inserting the insert portion into the insert carrying lumen; and (5…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.