Catheter with retractable cannula for delivering a plurality of chemicals
US5236424A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 5, 1992 |
| Grant date | Aug 17, 1993 |
| Priority date | — |
| Expiry date | Jun 5, 2012 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2025/0089
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Catheter with a retractable cannula for delivering a plurality of chemicals comprising a flexible elongate member having a centrally disposed lumen and a plurality of circumferentially spaced apart lumens including first and second fluid passage lumens Flexible elongate member has proximal and distal extremities. An actuator member is slidably mounted in the centrally disposed lumen. Springs are disposed within the centrally disposed lumen and engage the actuator member for moving the actuator member between extended and retracted positions. A tool having a distal extremity is carried by the actuator member and has a flow passage therein extending through the distal extremity of the tool. First and second fittings are secured to the proximal extremity of the flexible elongate member and having passages therein in communication with the first and second fluid passage lumens in the flexible elongate element. The distal extremity of the flexible elongate member is capable of supplying fluid from said first and second fluid passage lumens to the flow passage in the tool when the tool has been advanced to an extended position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.