Intra-vaginal device for pigs
US6444224B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 2, 2000 |
| Grant date | Sep 3, 2002 |
| Priority date | — |
| Expiry date | Mar 2, 2020 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61D7/00
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Disclosed herein is a porcine intra-vaginal device of a shape and size adapted to be positionable in the vaginal tract across the hymenal ring of a target animal (e.g., a gilt) to extend to both sides of the hymenal ring of the animal. The device once inserted delivers progesterone from a progesterone impreganated matrix on either side of the hymenal ring, the progesterone releasing surface being at least 150 cm2 in total area. Variable geometry means (preferably for vestibular engagement) ensure retention of the devices (e.g., for at least 7 to 14 days) where, in the preferred device, the progesterone load of from 1.9 to 2.5 g within 1.2 mm of the release surface can, by maintaining a progesterone blood plasma level (equating to a progestrone blood plasma level in excess of 4 ng/mL measured in an ovariectomised animal), ensure or prompt the onset of oestrus within 3 to 5 days after device removal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.