Transurethrovesical biopsy, amniocentesis and biological sampling guide
US5147335A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 24, 1989 |
| Grant date | Sep 15, 1992 |
| Priority date | — |
| Expiry date | Aug 24, 2009 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2025/0037
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A metehod and device for transurethrovesical biopsies, amniocenteses and other biological sampling procedures utilizing a double lumen catheter is achieved by the present invention. The catheter includes a rigid lumen to guide a needle and a second lumen able to pass fluid. In transurethrovesical sampling procedures, the catheter is positioned across the bladder with one end of the catheter against the bladder wall which adjoins the uterus wall. Fluids pass through the second lumen to fill the bladder and increase sonographic visibility allowing the user better visibility for precise placement of the catheter. Preferably, an amniocentesis or biopsy needle is passed through the first rigid lumen, through the bladder wall, through the uterus wall and into the amniotic sac to allow withdrawal of amniotic fluid or other biological sample. The needle may then be withdrawn through the rigid lumen and the catheter removed. In other biosampling procedures, the catheter is positioned across a body cavity to permit filling the cavity with fluid, sampling the target and sonographically viewing the biosampling operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.