Selectively controllable inflation-deflation device adapted for use in angioplasty procedures
US5306248A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 7, 1992 |
| Grant date | Apr 26, 1994 |
| Priority date | — |
| Expiry date | Apr 7, 2012 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M25/10187
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A selectively controllable inflation-deflation device for use with a balloon catheter during angioplasty procedures is disclosed. The device is constructed so that the piston shaft can be 1) locked and then rotatably and incrementally moved within the syringe cylinder to enable controlled pressurization, or 2) unlocked and moved within the cylinder to enable fluid purging of the cylinder and retraction of the piston shaft to a vacuum position. The device has a cylinder with proximal and distal ends and a fluid conduit adapted for communication with a balloon. A piston shaft is received within the proximal end of the cylinder. The piston shaft includes a piston mounted on the distal end of the shaft and the shaft is movable in one direction during inflation and in a second direction during deflation of the balloon. Screw threads are positioned on at least a portion of the piston shaft. A cam mechanism in the preferred form of a flexible arm and half nut member is mounted within the cylinder. A cam actuation mechanism in the preferred form of a collar is rotatably mounted on the cylinder and includes an extension that contacts a cam surface on the flexible arm and compresses the supp…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.