Chorionic villus sampling catheter
US8323209B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Jun 3, 2009 |
| Grant date | Dec 4, 2012 |
| Priority date | — |
| Expiry date | Jan 10, 2030 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2017/3456
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A catheter with a guide wire and handle is provided for sampling an area of interest, such as chorionic villi. The catheter contains a cannula of flexible plastic that is non-pyrogenic and latex-free, and a flexible obturator with an elongate cylindrical handle. The cannula is echogenic and can be easily visualized with visualization or imaging device. In an embodiment, the catheter may be curved manually by the operator to conform to the patient's anatomy and it is inserted through the cervix into a pregnant uterus at 10-13 weeks gestation and placed into the developing placenta under ultrasound guidance and a guide mechanism provided on the handle. In this embodiment, once the catheter has been placed, the obturator is withdrawn and a sample of chorionic villi is removed by applying appropriate pressure to the proximal end of the cannula and slowly withdrawing the cannula from the uterine cavity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.