Impedance sensor
US7645263B2 · kind B2 · utility
159Cited by
96References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 21, 2002 |
| Grant date | Jan 12, 2010 |
| Priority date | — |
| Expiry date | Aug 13, 2024 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2230/65
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A transdermal transport device includes a reservoir for holding a formulation of an active principle, a needle with a bore through which the formulation is transported between the reservoir and a target area of a biological body, and an impedance sensor. The impedance sensor has an electrode positioned to measure the impedance of a portion of the target area between the needle and the electrode to indicate the depth of penetration of the needle into the target area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.