Surgical implement detector utilizing a resonant marker
US5057095A · kind A · utility
396Cited by
6References
31Claims
0Family size
Inventor
Key dates
| Filing date | Nov 16, 1989 |
| Grant date | Oct 15, 1991 |
| Priority date | — |
| Expiry date | Nov 16, 2009 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2090/3958
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Apparatus for detecting a surgical implement in human or animal tissue comprises a detector responsive to the presence, within an interrogation zone, of a surgical implement to which a marker is secured. The marker is adapted to produce identifying signal characteristics within a frequency band generated in the interrogation zone. Variations in the phase and or direction of the interrogating field and changes in the electromagnetic coupling between markers and receiver optimize coupling therebetween.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.