Medical-surgical devices
US9636082B2 · kind B2 · utility
4Cited by
249References
30Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 27, 2012 |
| Grant date | May 2, 2017 |
| Priority date | — |
| Expiry date | Dec 2, 2034 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2210/1433
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
An embryo replacement catheter has a flexible extruded shaft of a transparent polyurethane with a bore extending along its length. Gas bubbles of a diameter in the range 5 .mu. to 10 .mu. are incorporated into the thickness of the wall of the shaft by adding gas during extrusion. The bubbles are selected to increase the visibility of the catheter under ultrasound imaging while still enabling material flowing along the catheter to be seen. The inventive catheter is not confined to embryo replacement catheters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.