Size-variable intrauterine pressay and contraceptive device

Details Size-variable intrauterine pressay and contraceptive device Size-variable intrauterine pressay and contraceptive device

1986-04-17

1988-02-16

Hafer, Robert A.

Surgery

Truss

Pad

128127, A61F 546

Patent

active

047248327

DESCRIPTION:

BRIEF SUMMARY
The invention relates to a size-variable intrauterine pessary with an arm adjustable to adapt to the uterine cavity geometry and a central rod-shaped part, which comprises a body and a control cylinder, through whose relative displacement the arms are adjustable and which has a coupling part with which a separate setting device is connected during fitting and which is removed after fitting as well as to a contraceptive device.
The design and size of a intrauterine pessary must be in a correct relationship to the available space in the uterus. Necessarily undesired side-effects result from geometric incompatability. The latter phenomenon has two possibilities, namely a too small intrauterine pessary with the risk of undesired pregnancy through the pessary slipping, whilst the other possibility is of a too large intrauterine pessary, which can generally lead to strong pressure, perforation of the mucosa, bleeding or pain.
A large number of intrauterine pessaries developed over the last few years shows that this problem has been recognized, but also shows that the problem has not as yet been solved. Due to lack of practicability and their complicated nature, adapted intrauterine pessaries have not been adopted into the daily routine.
Admittedly U.S. Pat. Nos. 3,407,806, 3,410,265 and 3,405,711 already disclose intrauterine pessaries adapted to the uterine cavity geometry, but they all suffer from the disadvantage that through a fixed setting and lack of variability of the spring tension when spreading apart the side arms, in the case of a very small uterine cavity, it is not possible to eliminate the risk of pressure, perforation of the mucosa, bleeding and pain. However, in the case of very weak spring tension, the danger exists with a large uterine cavity of the intrauterine pessary slipping and of an undesired pregnancy occurring.
DE-OS No. 2505104 also discloses an intrauterine pessary, which has a rod part with flexible side arms. However, this intrauterine pessary is not intended to adapt to the uterine cavity geometry and instead engages more or less strongly on the cavity walls as a function of the cavity geometry solely due to the specific internal stress of the plastic.
German Pat. No. 447,562 admittedly discloses reciprocally displaceable parts for moving locking levers, but these are rigid locking levers and not flexible side arms. In addition, locking teeth, and not a thread, are provided for adjustment purposes, so that there is only a spreading apart and not a setting or adjustment in the real sense of the term.
German Pat. No. 362,288 discloses an adjustable pessary head, but it has an extremely disadvantageous construction. The pessary head is not adaptable to the uterine cavity geometry and can instead only be adjusted in such a way that it is simply shoved through the narrow cross-section of the uterine cavity inlet.
On the basis of this information, the problem of the present invention is to provide an intrauterine pessary, which can better adapt to the individual geometrical conditions of the uterine cavity due to variable size changes and optimum insertion possibilities.
This problem is solved according to the invention by the features of a size-variable intrauterine pessary with arms which are articulated and constructed in a flexible manner at the upper end of a body and that for spreading apart these arms, the upper edge of a control cylinder is pressed against them.
It is therefore an object of the invention to provide a size-variable intrauterine pessary with plural arms adjusted to adapt to the uterine cavity geometry and a central rod-shaped part, which compries a body and a control cylinder, through whose relative displacement the arms are adjustable and which has a coupling part with which a separate setting device may be connected during fitting and which is removed after fitting wherein the arms are articulated in a flexible manner at the upper end of the body and for spreading apart of the arms, the upper edge of the control cylinder is pressed against.
It is another object o

REFERENCES:
patent: 3405711 (1968-10-01), Bakunin
patent: 3407806 (1968-10-01), Hulka et al.
patent: 3410265 (1968-11-01), Chaft
patent: 3952734 (1976-04-01), Van Os et al.
patent: 4198966 (1980-04-01), Kaivola
patent: 4353363 (1982-10-01), Sopenaqruesada
patent: 4578076 (1986-03-01), Luukainen et al.

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