Delaying pre-term birth
A device for retarding birth including an upper ring for surrounding a cervix, an anchoring component for anchoring the device, and an elastic component for attaching the upper ring to the anchoring component, wherein the elastic component pushes the upper ring and the anchoring component apart. A device for retarding birth including a sleeve for surrounding a cervix along a greater portion of a length of the cervix, a support strip on the sleeve directed along an axis of the sleeve, and a ring at least partially around the sleeve, in which when a top of the sleeve is pushed to expand radially, the support strip pivots on the ring, such that an end of the support strip near the top of the sleeve moves radially outward, and an end of the support strip near the bottom of the sleeve moves radially inward. Related apparatus and methods are also described.
1. A method of retarding birth comprising:
placing a device for retarding birth on a cervix, the placing the device comprising:
inserting the device into a vagina;
placing a ring around the cervix, comprising:
expanding the ring to be wider than the cervix;
pushing the ring up along the cervix toward an upper portion of the cervix; and
releasing the ring to grip the cervix; and
placing an anchoring component around the cervix;
such that when the upper portion of the cervix exerts force on the ring, the ring exerts an inward closing force on the anchoring component.
2. The method according to claim 1 and further including automatically releasing the device from the cervix.
3. The method according to claim 2 wherein the automatically releasing comprises automatically releasing the anchoring component from anchoring the device to the cervix based on a force of uterine contractions.
4. The method according to claim 2 wherein the automatically releasing comprises using a unit to activate automatic release of the device from the cervix based, at least in part, on force of contractions exceeding a known threshold.
5. The method according to claim 1 wherein the placing the anchoring component around the lower portion of the cervix comprises:
expanding the anchoring component to be wider than the cervix; and
releasing the anchoring component to grip the cervix.
6. The method of claim 1 and further comprising:
activating a quick release mechanism to release an anchoring component from anchoring the device to a body of a patient.
7. The method of claim 1 and further comprising anchoring the anchoring component of the device against the cervix.
8. The method of claim 1 and further comprising:
using a gauge arranged to indicate a force exerted upon the ring, thereby estimating a force exerted by a uterine contraction.
9. The method according to claim 1 and further comprising using a component arranged to indicate a birth progress parameter.
10. The method according to claim 1 and further comprising the device using a component to release a drug.
11. The method according to claim 1 and further comprising using a gauge attached to the device and reading a marking arranged to indicate a degree to which the anchoring component is compressed.
12. A device for retarding birth comprising:
the device having an internal cavity volume shaped as a lumen sized and shaped for surrounding a cervix;
longitudinal strips extending from an upper end of the lumen to an anchoring component;
the upper end of the lumen sized and shaped for surrounding the cervix; and
a ring surrounding the anchoring component and compressing the anchoring component toward a center of the lumen, wherein the ring is configured to be expanded to be wider than the cervix, pushed up along the cervix toward an upper portion of the cervix and released to grip the cervix,
the device configured such that when the upper portion of the cervix exerts force on the upper end of the lumen, the device enables a vector change of the exerted force such that the upper end exerts an inward closing force on the anchoring component.
13. The device of claim 12 wherein the anchoring component comprise a surface arranged so as to increase friction with a surface of the cervix when the surface of the anchoring component is located against the surface of the cervix so as to anchor against the cervix.
14. The device of claim 12 wherein the anchoring component is at a lower end of the lumen.
15. The device of claim 12 and further comprising an automatic release mechanism to release the anchoring component from anchoring the device to the cervix.
16. The device of claim 15 wherein the automatic release mechanism is configured to release the anchoring component from anchoring the device to the cervix based on a force of uterine contractions.
17. The device of claim 12 and further comprising a quick release mechanism to release the anchoring component from anchoring the device to the cervix.
18. The device of claim 12 and further comprising a component for measuring birth progress parameters.
19. The device of claim 12 and further comprising a component for releasing a drug.
20. The device of claim 12 in which a distance between the upper end of the lumen and the anchoring component is less than a length of a cervix.
21. The device of claim 12 and further comprising a gauge attached to the device and comprising a marking arranged to indicate a degree to which the anchoring component is compressed.
22. The device of claim 12 and further comprising a unit for measuring a force of contractions.
23. The device of claim 22 and further comprising a unit for activating automatic release of the device from the cervix based, at least in part, on the force of contractions exceeding a known threshold.