Method for collecting blood samples
US3943917A · kind A · utility
21Cited by
10References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 12, 1975 |
| Grant date | Mar 16, 1976 |
| Priority date | — |
| Expiry date | May 12, 1995 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/150259
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention relates to a method for collecting a blood sample from a blood vessel, such as an artery, by means of a syringe, preferably of the type having a piston displaceably mounted within a cylinder which is provided with a hollow needle. Before the needle is inserted in the blood vessel from which the blood sample is to be collected the piston is displaced to a retracted position, and the cylinder space defined by the piston is vented to the atmosphere. The invention also relates to a blood sampling syringe having means for venting the cylinder space to the atmosphere in a retracted position of the syringe piston.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.