Blood aspiration assembly components and blunt needle aspirators
US5466219A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 27, 1992 |
| Grant date | Nov 14, 1995 |
| Priority date | — |
| Expiry date | Aug 27, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S604/905
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A blood aspiration assembly and method has proximal, intermediate and distal tubing, an adjustable volume reservoir and an aspirator receiver. The receiver has a housing with a rigid casing and a resilient plug, and a liquid flow chamber. The resilient plug has a slit or perforation to allow passage of a blunt needle therethrough. The plug can have two parts of different compliance, which aligned slits or perforations. The blunt needle tip can be rounded or flat, with a side opening for the needle bore. The contour of the needle tip and the design of the plug are correlated such that the working force required to penetrate the needle tip into the plug perforation is considerably less than the force required for said needle tip to penetrate normal intact human skin of the hands or arms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.