Method and device for the extraction of a body fluid
US7833172B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 7, 2007 |
| Grant date | Nov 16, 2010 |
| Priority date | — |
| Expiry date | Oct 28, 2027 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/15186
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present invention provides a method and a device for piercing a body part and determining whether a sufficient volume of blood has been withdrawn. A lancing element is rapidly inserted into a body part in a forward phase and retracted quickly to a lesser puncturing depth. Subsequently, the lancing element is retracted slower than during the first retraction movement and the distance retracted during the second retraction is shorter than the first retraction movement. During the second retraction movement, body fluid is collected in a collection phase by a capillary structure of the lancing element. Contact between the lancing element and the body fluid is detected after the forward phase at the beginning and the end of a waiting period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.