Needle penetration indicator and guide
US4662870A · kind A · utility
Inventors
Key dates
| Filing date | Jul 15, 1985 |
| Grant date | May 5, 1987 |
| Priority date | — |
| Expiry date | Jul 15, 2005 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M25/06
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A device for indicating the penetration of a needle into a vein, artery, lumen, or other cavity in a patient's body includes a filament that is moved through the needle toward its sharpened end. As the needle is inserted through bodily tissue, the distal end of the filament is retained by the tissue at the needle's sharpened end. The filament is loaded with compressive force so that the distal tip is moved through the end of the needle when the end enters a space. Penetration is indicated by the sudden movement of a visible indicator attached to the filament that is caused when the retention of the filament's distal tip is released by the penetration of the needle's end into the space.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.