Intrauterine device with retrieval thread
An intrauterine contraceptive system may include a contraceptive intrauterine device, a retrieval thread permanently attached to the intrauterine device and an insertion device for inserting the intrauterine device into a uterus. The system may also include a release thread releasably coupled with the intrauterine device. The intrauterine device may be deployable out of a distal end of the insertion device and may be configured to change from a delivery configuration when housed in the insertion device to a deployed configuration when deployed in a uterus. The retrieval thread and the optional release thread may be at least partially housed within the insertion device during insertion of the intrauterine device into the uterus. The release thread may extend from the intrauterine device through the insertion device to an attachment point at or near a proximal end of the insertion device.
1. A method for delivering a contraceptive intrauterine device into a uterus, the method comprising:
advancing a distal end of an insertion device through a vaginal cavity and a cervix and into the uterus;
advancing the intrauterine device out of the distal end of the insertion device, into the uterus, wherein the intrauterine device is permanently attached to a retrieval thread and removably coupled with a release thread;
pulling the release thread off of the intrauterine device; and
removing the release thread and the insertion device from the uterus, leaving the intrauterine device behind in the uterus, without cutting the retrieval thread, wherein the retrieval thread extends from an attachment point of the retrieval thread with the intrauterine device through the cervix into the vaginal cavity.
2. A method as in claim 1 , further comprising controlling advancement of the intrauterine device out of the distal end of the insertion device, using the release thread.
3. A method as in claim 1 , further comprising manipulating the intrauterine device during or after advancing it out of the distal end of the insertion device, by manipulating the release thread.
4. A method as in claim 1 , wherein pulling the release thread comprises pulling one end of the release thread, and wherein the release thread is looped through the intrauterine device.
5. A method as in claim 1 , wherein removing the release thread and the insertion device from the uterus comprises:
removing the release thread first, by pulling it out through the insertion device; and
after removing the release thread, pulling the insertion device out of the uterus.
6. A method as in claim 1 , wherein removing the release thread and the insertion device from the uterus comprises pulling the release thread and the insertion device out of the uterus together, at the same time.
7. A method as in claim 1 , further comprising viewing the retrieval thread in the vaginal cavity after removing the release thread and the insertion device from the uterus.
8. A method as in claim 7 , further comprising confirming delivery of the intrauterine device sufficiently far into the uterus to perform contraception, based on viewing the retrieval thread.
9. A method as in claim 8 , wherein viewing the retrieval thread comprises viewing a colored marker on the thread, wherein the marker is located a known distance from the attachment point of the retrieval thread with the intrauterine device.
10. A method as in claim 8 , wherein viewing the retrieval thread comprises viewing a color change at a point along the thread, wherein the point is located a known distance from the attachment point of the retrieval thread with the intrauterine device.