Thoracentesis device with hyper-sensitive detection mechanism
US6638251B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 22, 2002 |
| Grant date | Oct 28, 2003 |
| Priority date | — |
| Expiry date | Jul 22, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2090/0811
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A thoracentesis device having a hypersensitive dual spring indication mechanism for visually alerting the user of any contact to internal body organs by the blunt tip distal end of the device once the it as been inserted inside a patient's body. The thoracentesis device includes a handle and an outer needle fixedly attached thereto having a sharp distal end for penetrating a chest cavity wall and a conduit that is in communication with a cavity defined inside the handle. A dual spring-loaded inner needle is slidably disposed inside the conduit of the outer needle with the inner needle being operably is associated with a large spring that imparts a sufficient distal spring force to fully extend the blunt tip distal end of the inner needle beyond the sharp distal end of the outer needle and a small spring for imparting a smaller spring force thereto.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.