GB2042899A - Intrauterine Contraceptive Device - Google Patents
Intrauterine Contraceptive Device Download PDFInfo
- Publication number
- GB2042899A GB2042899A GB7908142A GB7908142A GB2042899A GB 2042899 A GB2042899 A GB 2042899A GB 7908142 A GB7908142 A GB 7908142A GB 7908142 A GB7908142 A GB 7908142A GB 2042899 A GB2042899 A GB 2042899A
- Authority
- GB
- United Kingdom
- Prior art keywords
- stem
- free end
- transverse portion
- transverse
- terminal portion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F6/00—Contraceptive devices; Pessaries; Applicators therefor
- A61F6/06—Contraceptive devices; Pessaries; Applicators therefor for use by females
- A61F6/14—Contraceptive devices; Pessaries; Applicators therefor for use by females intra-uterine type
- A61F6/142—Wirelike structures, e.g. loops, rings, spirals
Landscapes
- Health & Medical Sciences (AREA)
- Reproductive Health (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Orthopedics, Nursing, And Contraception (AREA)
Abstract
An intrauterine contraceptive device has a plastics member comprising a stem (12) and a terminal portion (16) extending from opposite ends of a transverse member (14). The stem and terminal member have respective free ends (18 and 20) with the free end of the stem furthest from the transverse portion. A cord (28) is anchored to the free end of the terminal portion and passes through an orifice (30) in the free end of the stem for drawing the free ends together to fold the device when it is to be withdrawn. <IMAGE>
Description
SPECIFICATION
Intrauterine Contraceptive Devices
This invention relates to intrauterine contraceptive devices.
The majority of intrauterine contraceptive devices which are commercially available have a plastics member providing a stem and a transverse portion. Insertion of the device is usually accomplished by deforming the devices and inserting them into a plastic straw. An end part of the straw is inserted into the uterus and the device is then ejected, for example, by means of a plunger. The straw is withdrawn and the devices left to reassume its desired shape as a result of its inherent resilience.
Withdrawal is usually accomplished by drawing a thread attached to the stem so that the device is itself drawn through the cervical canal.
As this canal is normally of the order of 4 mm, the withdrawal can cause pain and discomfort.
With devices in which the stem and transverse portion form the shape of a Figure 7, the rigidity of the plastics material used can result in a resistance of the device towards uterine contractions and it is therefore possible for the free end of the transverse portion to perforate the uterine wall and also for the device to migrate out of the uterus.
According to the present invention there is provided an intrauterine contraceptive device comprising a plastics member providing a transverse portion, and a stem and a terminal portion extending to the same side of the transverse portion but from opposite ends thereof, the stem and terminal portion having respective free ends spaced from the transverse portion with the free end of the stem furthest from the transverse portion of the plastics member; and further comprising a cord which is anchored to the free end of the terminal member and passes slidably through an orifice in the free end of the stem.
When the cord of this device is pulled, the free end of the terminal portion can be pulled towards the free end of the stem and the necessary inherent resilience of the device will also allow the transverse portion to move towards the stem.
To obtain optimum results, the combined length of the transverse portion and terminal portion should be less than the length of the stem. With this arrangement, it will be appreciated that withdrawal of the device is thus effected by drawing the transverse portion and terminal portion towards the stem by means of the cord, to reduce the resistance of the device to passage through the cervical canal and to reduce pain and discomfort to the patient.
The terminal portion of the device may be at an angle to the transverse portion and inclined towards the stem so that it follows more closely the contour of the wall of the uterus. The terminal portion can thus help to prevent perforation of the uterine wall. In addition, a bulbous junction can be provided where the stem joins the transverse member for improving location of the device in the uterus while further reducing the possibility of
damage to the uterine wall.
The plastics member of the present invention
can be more flexible than those usually provided
in this field and this can further assist in
simplifying withdrawn of the device.
An embodiment of the invention will now be
described, by way of example, with reference to
the accompanying drawing, in which:
Figure 1 illustrates an intrauterine
contraceptive device as it will appear in use;
Figure 2 is a view of the position intended to be
assumed by the device when it is being
withdrawn.
As shown in Figure 1, an intrauterine
contraceptive device 10 has a stem 12,
transverse portion 14 and terminal portion 16
formed, integrally with one another, from a
suitable resilient plastics material. The transverse
portion is slightly bowed away from the stem 12.
The stem and the terminal portion extend to
the same side of the transverse portion 14 but
from opposite ends thereof. The stem and
terminal portion have respective free ends 18 and
20 spaced from the transverse portion with the
free end of the stem furthest from the transverse
portion of the plastics member. The combined
length of the transverse portion and the terminal
portion is less than the length of the stem.
The part 22 of the stem closest to the
transverse portion 14 extends towards the
terminal portion and curves away from the
transverse portion. At the same time, the terminal
portion 16 is at an angle to the transverse portion
and is inclined towards the stem for following
more closely the wall of the uterus, as shown. A
bulbous junction 24 is provided where the stem
joins the transverse member.
In accordance with conventional practice, a
copper coil 26 is provided on the stem 12, being
wound tightly around the stem so that it does not
move once the device has been located.
A cord 28 is passed through an opening in the
free end of the terminal portion 1 6 and is tied so
that the cord is firmly anchored to the free end
20. The cord 28 then extends to the free end 18
of the stem, where it passes slidably through an
orifice 30 in the free end of the stem. This means
that, by pulling the cord, it is possible to move the
free end 20 of the terminal portion towards the
free end 1 8 of the stem.
The device is inserted by squeezing it and
sliding it into a plastics straw. A plunger is
inserted into the straw for pushing the device
from the straw with the bulbous junction 24
foremost. Upon insertion of the straw into the
uterus, the device is thus ejected from the straw
by the plunger and the device then assumes the
desired shape within the uterus due to its inherent resilience.
For the purpose of withdrawing the device, the
cord 28 can be pulled to bring the free end 20 of
the terminal portion 16 towards the free end 18
of the stem 12. This also brings the transverse portion 14 closer to the stem so that the device generally adopts a position similar to that shown in Figure 2. The free end 18 of the device may be held when the cord 28 is pulled, if necessary.
When the device is in the folded position shown in Figure 2, it is in a condition to pass easily through the cervical canal. Pain and discomfort can therefore be reduced.
Outwardly projecting ridges could be provided on the bulbous junction 24 and at the junction of portions 14 and 16 to enhance retention of the device.
Claims (7)
1. An intrauterine contraceptive device comprising:
a plastics member providing a transverse portion, and a stem and a terminal portion extending to the same side of the transverse portion but from opposite ends thereof, the stem and terminal portion having respective free ends spaced from the transverse portion with the free end of the stem furthest from the transverse portion of the plastics member; and
a cord which is anchored to the free end of the terminal member and passes slidably through an orifice in the free end of the stem.
2. The device of claim 1, wherein the combined length of the transverse portion and terminal portion is less than the length of the stem.
3. The device of claim 1 or 2, wherein a part of the stem closest to the transverse portion extends towards the terminal portion and curves away from the transverse portion.
4. The device of any preceding claim, wherein the plastics member provides a bulbous junction where the stem joins the transverse member.
5. The device of any preceding claim, wherein the terminal portion is inclined towards the stem for following more closely the wall of a uterus.
6. The device of any preceding claim, wherein a copper coil is provided on the stem.
7. An intrauterine contraceptive device substantially as herein described with reference to the accompanying drawing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7908142A GB2042899A (en) | 1979-03-08 | 1979-03-08 | Intrauterine Contraceptive Device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7908142A GB2042899A (en) | 1979-03-08 | 1979-03-08 | Intrauterine Contraceptive Device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2042899A true GB2042899A (en) | 1980-10-01 |
Family
ID=10503710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7908142A Withdrawn GB2042899A (en) | 1979-03-08 | 1979-03-08 | Intrauterine Contraceptive Device |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2042899A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106726093A (en) * | 2016-12-27 | 2017-05-31 | 江苏省计划生育科学技术研究所 | A kind of contraceptive and medical contraception apparatus |
-
1979
- 1979-03-08 GB GB7908142A patent/GB2042899A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106726093A (en) * | 2016-12-27 | 2017-05-31 | 江苏省计划生育科学技术研究所 | A kind of contraceptive and medical contraception apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |