US3490446A - Contraceptive - Google Patents

Contraceptive Download PDF

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Publication number
US3490446A
US3490446A US629869A US3490446DA US3490446A US 3490446 A US3490446 A US 3490446A US 629869 A US629869 A US 629869A US 3490446D A US3490446D A US 3490446DA US 3490446 A US3490446 A US 3490446A
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United States
Prior art keywords
uterine
blank
loop
uterus
mechanical
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Expired - Lifetime
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US629869A
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English (en)
Inventor
Milos Slonek
Stanislav Holanek
Pavel Cerny
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Statni Vyzkumny Ustav Textilni
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Statni Vyzkumny Ustav Textilni
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    • 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

Definitions

  • the present invention relates to contraceptives in general, and more particuarly to mechanical contraceptives. Still more specifically, the present invention relates to mechanical intra-uterine contraceptive devices.
  • Polyethylene and its copolymer vinyl acetate have been found particularly suitable, and it has also been proposed that to facilitate location of the onceinserted device the basic polymer be filled with barium sulphate so that the device will morereadily show up on X-ray examination or be locatable by the acoustic frequency method.
  • the spiral and loop-shaped devices cover, when deformed within the uterus, the greatest area of the walls bounding the uterine cavities.
  • their open shape renders them susceptible to being easily expelled.
  • the bow device when deformed, covers substantially smaller areas of the Wall bounding the uterine cavity, so that gravidity may occur in portions of the wall which are not covered by the device.
  • mechanical 'intra-uterine contraceptive devices of the open and closed types as just described above -cover the walls bounding the uterine cavity in two dimensions while the uterus is in idle state.
  • idle state it is meant that the uterine is not undergoing muscular contractions. Such contractions are, however, characteristic of the uterus and occur rather frequently.
  • the shape of the uterine cavity changes and the uterine walls move so that the aforementioned types of devices cannot cover the desired seventy five percent of the uterine cavity area in the third dimension brought about by the contractions.
  • the present invention overcomes the disadvantages set forth above with respect to the previously existing state of the art.
  • the present invention provides a mechanical intra-uterine contraceptive device which has the capacity to conform itself and to modify its shape in the variously-configurated three-dimensional volumes of space which are defined within the uterus during changes in the latter in response to muscular contraction.
  • the mechanical intra-uterine contraceptive device in accordance with the present invention is possessed of inherent recovery ability subsequent to deformation resulting from shifts in the uterine walls.
  • the device according to the present invention is simple and inexpensive to construct, and has a wide range of applicability for the prevention of unwanted pregnancies and as a treatment for therapeutic indications.
  • the device disclosed here is applicable not only for use on human beings, but can also be utilized in veterinary practice.
  • a mechanical intra-uterine contraceptive device which is an endless body of elastically deformable wirelike material.
  • This body has a plurality of loop portions which are disposed in dilferent planes and each of which is deformable in the respective plane as well as transversely thereof.
  • Another aspect of our invention resides in a method of making such a mechanical intra-uterine device, and this method comprises the steps of forming a blank which consists of an endless length of elastic material which is disposed in a single plane, and in the subsequent conversion of the thus obtained blank into a series of loops which are respectively located in different planes from one another, so that the inherent elasticity of the material tends to increase the distance between the two outermost ones of these loops.
  • FIG. 1 is a diagrammatic showing of a blank for an intra-uterine contraceptive device in accordance with the present invention
  • FIG. 2 is a top view of the contraceptive device which results from coiling the blank of FIG. 1 into an endless spatial spiral;
  • FIG. 3 is a side view of the device as shown in FIG. 2, showing the loops of the spiral in abutting state;
  • FIG. 4 is a side view of the device with the spatial arrangement apparent
  • FIG. 5 is a frontal view of the device inserted in a uterus
  • FIG. 6 is a sagittal section of a uterus in idle or normal state, having the present device inserted therein;
  • FIG. 7 is the same view as shown in FIG. 6, but showing the uterus while undergoing uterine contractions.
  • a blank for making the novel device in accordance with the present invention consists of an endless strip of wire-like material. It has been found that polyethylene or its co-polymers, which if desired may be filled with barium or other substances to provide X-ray contrast, are particularly suitable and make possible a device having the desired elasticity and shaperecovery characteristics.
  • the blank of FIG. 1 is preferably made. by injection molding, but need not necessarily be made by the method.
  • the plastic strip or wire has a cross section which is different at different points of the material and, although this is not specifically shown, this cross section varies from circular to oval or elliptic shape.
  • the material thickness of the blank ranges between 0.8 and 2.5 mm. and this provides the device with better resistance to mechanical strains which it undergoes, particularly when it is pulled into an intertergite prior to being introduced into the uterine cavity. This will be discussed later on.
  • the blank shown in FIG. 1 is a planar body consisting of two integral portions located on opposite sides of a plane of symmetry coinciding with the longitudinal axes of the blank.
  • FIG. 1 shows that the blank consists of two arcuate end portions of which the larger one is identified with reference numeral 1 whereas the smaller one is identified with reference numeral 2.
  • the end portions 1 and 2 are connected to one another by a pair of integral side or leg portions 3 which in FIG. 1 are shown to be linear but which, it will be understood, may also be curved or bowed.
  • the larger end portion 1 has a radius which is preferably four times greater than the radius of the shorter or smaller end portion 2.
  • the end portions are shown to be of semi-circular configuration and in such case the diameter of the larger end portion 1 will be four times that of the smaller end portion 2. Having just stated that the relationship is four to one it should be pointed out that this is only an exemplary figure. Actually, the ratio of the radii or, if the end portions are semi-circular, of the diameters can vary within a range of 1:25 and 115.5.
  • the overall longitudinal extension of the blank is assumed to be 12 cm. and this is assumed to be approximately 2.5 times the diameter of the larger end portion 1.
  • This ratio also, can vary within a range of 1:1.8 and 1:3.
  • the desired ratio between the end portions 1 and 2 and the legs 3 is obtained so that, after coiling the blank into the form shown in FIG. 2, an endless spatial spiral 4 is obtained, as clearly shown in FIG. 2.
  • the device which is obtained by coiling the blank of FIG. 1, for instance about the finger of the person who will insert the contraceptive device into the uterus, is a three-dimensional..-body comprising egg-shaped and oval loops which are formed from the end portions 1 and 2 as well as from the legs 3.
  • FIG. 3 shows the form of the device after the blank ,of FIG. 1 has been coiled about a finger of the inserter and has then been removed from the finger. In this view the coils are abutted against one another.
  • FIG. 41 shows what happens when the person releases his hold on the device as illustrated in FIG. 3, and how the inherent elasticity of the device causes the loops to move apart from one another. It will be clearly evident that all of the'loops are now located in different planes.
  • FIG. 2 shows a device according to the invention as it appears when inserted into the uterine cavity. It is clearly evident that the device forms a three-dimensional body wherein each loop islocated in a different plane, and whereof each loop. can, be deformed in its own plane as well as transversely thereof independently of the other loops formed by the spatial spiral. It is this three-dimensional shape which is responsible for the high efliciency which has been found in the novel device, and which also prevents the expulsion of the device during uterinecontractions.
  • This configuration in form of a three-dimensional body, in which the loops formed from the larger and smaller end portions 1 and 2 form two opposite arches and contact the frontal and lower uterine cavities, is not known from the prior art.
  • FIG. 5 shows' that'the spiral which is formed by winding the body'or blank of FIG. 1 about the fingers of the inserter, and which has a configuration as shown in FIG. 3, is inserted or pulled into an inserting device 5 by means of which it is introduced into the uterine cavity 6. Therein the device is expelled or released from the inserting device 5 and opens into the configuration shown in FIG. 2 and. FIG. 5, that is into an endless spatial spiral 4.
  • the spiral 4 covers the desired maximum area of the uterine cavity and, unlike devices of the type known from the prior art, it is capable of conforming itself to the shape of the uterine cavity. This is illustrated in FIGS. 6 and 7, which respectively show cross sections of the uterus in the idle state and during uterine contractions.
  • the capacity of the device to conform itself and to modify its shape in the three-dimensional space defined within the uterus is clearly evident from these figures and is an outstanding property of the novel device which is responsible for the effective performance of the device.
  • the plastic strip or wirelike material of the blank that is of the basic planar body, is prestressed whereby its recovery ability after deformation is greatly enhanced.
  • This ability is further supported by the local reinforcement provided by increases in the cross section of the device at predetermined points on the basic body, such section being reinforced or increased at points which are dynamically strained during contractions of the uterine cavity in which the device is to be located.
  • the use of the device in accordance with the present invention is not limited to applications for human beings, but can also be extended to veterinary practice. Furthermore, the novel device need not be limited in its application to contraceptive uses per se, but can also be employed for therapeutic indications.
  • a mechanical intra-uterine contraceptive device comprising an endless body of elastically deformable wire-like material, said body having a longitudinal as well as a transverse extension and being provided with a plurality of loop portions of different sizes disposed in different planes respectively and whose major loop sections are out of contact in direction of said longitudinal extension so that each of said loop portions is deformable in the respective plane as well as transversely thereof.
  • each of said loop portions is deformable independently of the remaining loop portions.
  • a blank for producing a mechanical intra-uterine device comprising an endless body of wire-like material having a first loop portion of a relatively large radius of curvature, a second loop portion of a smaller radius of curvature than that of said first loop portion, and a pair of elongated leg portions elongated between and each connecting one end of said first loop portion with a corresponding end of said second loop portion.
  • one of said loop portions has a radius of curvature which is four times greater than the radius of curvature of the other of said loop portions.
  • a method of making a mechanical intra-uterine device comprising the steps of forming a blank consitsing of an endless length of elastic material disposed in a single plane; and converting said blank into a body composed of a series of loops of dilferent sizes respectively located in different planes from one another, whereby the inherent elasticity of the material tends to increase the distance between the two outermost loops and impart to said body a length determined by the maximum distance between said two outermost loops.
  • a method as defined in claim 23, wherein said step of converting said blank includes twisting said blank into the shape of an endless spatial spiral.

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  • 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)
US629869A 1966-04-07 1967-04-06 Contraceptive Expired - Lifetime US3490446A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS232266 1966-04-07

Publications (1)

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US3490446A true US3490446A (en) 1970-01-20

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US629869A Expired - Lifetime US3490446A (en) 1966-04-07 1967-04-06 Contraceptive

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Country Link
US (1) US3490446A (enrdf_load_stackoverflow)
DK (1) DK115142B (enrdf_load_stackoverflow)
FR (1) FR1561076A (enrdf_load_stackoverflow)
GB (1) GB1151172A (enrdf_load_stackoverflow)
NL (1) NL6704967A (enrdf_load_stackoverflow)
NO (1) NO116010B (enrdf_load_stackoverflow)
SE (1) SE347655B (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3683905A (en) * 1970-03-16 1972-08-15 Marc E Chaft Intra-uterine contraceptive devices
US3690324A (en) * 1970-01-26 1972-09-12 Mayer D Spivack Baby{40 s pacifier
US4568338A (en) * 1983-09-22 1986-02-04 C. R. Bard, Inc. Preformed catheter
US5014722A (en) * 1988-03-30 1991-05-14 Bauer Hans A Intra-uterine pessary
US20110271963A1 (en) * 2009-01-18 2011-11-10 Ocon Medical Ltd Novel intra uterine device
JP2018504950A (ja) * 2014-12-11 2018-02-22 オコン メディカル リミテッド 子宮腔に配置可能な器具

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2577797A1 (fr) * 1985-02-22 1986-08-29 Benardin Henri Dispositif de contraception feminine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2122579A (en) * 1934-06-13 1938-07-05 Louis W Meckstroth Intra-uterine device
US3200815A (en) * 1962-04-24 1965-08-17 Mount Sinai Hospital Res Found Coil spring intra-uterine contraceptive device and method of using
US3250271A (en) * 1963-04-29 1966-05-10 Lippes Jack Intrauterine device
US3306286A (en) * 1965-04-13 1967-02-28 Schueler & Company Intrauterine device
US3312214A (en) * 1966-06-06 1967-04-04 Burdick Charles Lalor Intra-uterine device
US3397691A (en) * 1966-06-02 1968-08-20 Majzlin Gregory Intra-uterine contraceptive device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2122579A (en) * 1934-06-13 1938-07-05 Louis W Meckstroth Intra-uterine device
US2176559A (en) * 1934-06-13 1939-10-17 Louis W Meckstroth Intra-uterine device
US3200815A (en) * 1962-04-24 1965-08-17 Mount Sinai Hospital Res Found Coil spring intra-uterine contraceptive device and method of using
US3250271A (en) * 1963-04-29 1966-05-10 Lippes Jack Intrauterine device
US3306286A (en) * 1965-04-13 1967-02-28 Schueler & Company Intrauterine device
US3397691A (en) * 1966-06-02 1968-08-20 Majzlin Gregory Intra-uterine contraceptive device
US3312214A (en) * 1966-06-06 1967-04-04 Burdick Charles Lalor Intra-uterine device

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3690324A (en) * 1970-01-26 1972-09-12 Mayer D Spivack Baby{40 s pacifier
US3683905A (en) * 1970-03-16 1972-08-15 Marc E Chaft Intra-uterine contraceptive devices
US4568338A (en) * 1983-09-22 1986-02-04 C. R. Bard, Inc. Preformed catheter
US5014722A (en) * 1988-03-30 1991-05-14 Bauer Hans A Intra-uterine pessary
US20110271963A1 (en) * 2009-01-18 2011-11-10 Ocon Medical Ltd Novel intra uterine device
US9750634B2 (en) * 2009-01-18 2017-09-05 Ocon Medical Ltd Intra uterine device
US10639188B2 (en) 2009-01-18 2020-05-05 Ocon Medical Ltd. Intra uterine device
US20200222230A1 (en) * 2009-01-18 2020-07-16 Ocon Medical Ltd. Intra uterine device
US12053413B2 (en) * 2009-01-18 2024-08-06 Ocon Medical Ltd. Intra uterine device
JP2018504950A (ja) * 2014-12-11 2018-02-22 オコン メディカル リミテッド 子宮腔に配置可能な器具
US10905583B2 (en) * 2014-12-11 2021-02-02 Ocon Medical Ltd. Device positionable in the uterine cavity

Also Published As

Publication number Publication date
SE347655B (enrdf_load_stackoverflow) 1972-08-14
GB1151172A (en) 1969-05-07
FR1561076A (enrdf_load_stackoverflow) 1969-03-28
NO116010B (enrdf_load_stackoverflow) 1969-01-13
DK115142B (da) 1969-09-08
NL6704967A (enrdf_load_stackoverflow) 1967-10-09

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