Instrument for spinal taps
US3955558A · kind A · utility
20Cited by
11References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 4, 1974 |
| Grant date | May 11, 1976 |
| Priority date | — |
| Expiry date | Nov 4, 1994 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/3401
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An instrument for performing a spinal tap includes a body member carrying a hypodermic needle of non-circular transverse cross section and a sharply beveled tip. A guide block has an obliquely extending complementary non-circular bore which is axially slideably engageable by the needle to maintain its orientation and prevent its axial rotation. In puncturing the spinal column, the needle is guided by the block bore and upon entry, cuts a flap in the spinal column surrounding tissue which flap closes the needle entry opening upon withdrawal of the needle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.