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
  • A61F6/20—Vas deferens occluders; Fallopian occluders
  • A61F6/22—Vas deferens occluders; Fallopian occluders implantable in tubes
  • A61F6/225—Vas deferens occluders; Fallopian occluders implantable in tubes transcervical

Definitions

• the present invention relates to an arrangement for sealing body canals comprising a body made of a material which swells on absorption of body fluid so that after introduction in the non-ex ⁇ panded state it swells and seals the canal.
• the arrangement further ⁇ more comprising locking devices arranged to be pressed against the walls of the body channels and thus bring about anchorage of the body .
• sealing bodies of this type are often extremely small and permit the attachment of only small, fine devices , which results in a weak spring action and thus a low locking action .
• the heavy duty locking devices can be used, the draw back of too great a resistance against insertion may arise.
• the locking devices as a result of spring action try to adopt an inner position in which they are designed mainly not to exert any locking action or only a slight action.
• the locking devices are so arranged in relation to the expandable body that on expansion the latter is pressed against the locking devices and forces them outwards to an outer position in which they are designed to give a marked locking action .
• the fl m of the invention is to bring about retention of the body in its position which is more reliable than has been previously possible in the context concerned.
• Another a m of the invention is to provide an arrangement which can be introduced to the desired position in the body channel in a safe manner and with full control over the position of the body, and at a from the locking action independent resistance against insertion.
• Fig. 1 illustrates in section the " first embodi ⁇ ment
• Fig. 2 show r s a section through the second embodiment, both diagrams illustrating an initial position
• Fig. 3 illustrates the first embodiment
• Fig. 4 illustrates the second embodiment, with both diagrams illustrating the application mode
• Fig. 5 illustrates the arrangement firstly in an insertion stage and secondly placed in a female oviduct.
• the sealing arrangement 1 in accordance with the first embodiment is formed by a preferably circular plate 2 which is attached to the end of a thread 3.
• a locking device 4 with a number of wings 5 which point obliquely outwards is furthermore
• OMPI attached to the thread 3 a short distance from the plate 2.
• a second plate 6, from which a free portion 7 of the thread proceeds is fastened to the thread a short distance from the locking device 3 in the direction towards which the wings 5 are pointing.
• All the components just mentioned on the thread 3 are, like the actual thread, made of a material which is inert to the body fluids , e. g. a plastic material. The components can be attached to the thread by moulding.
• a body 8 of an expandable material can be a hydrogel, but a fibrous material is also suitable.
• hydrogels have proved to be particularly suitable in the said con ⁇ text, because a body made of a hydrogel does not, unlike a fibrous body, tend to leave any fragments behind.
• hydrogels are inert in respect of body fluids and can be made to expand to the desired extent.
• a volumetric expansion of 20-300%, measured linearly can be obtained by a co-polymerisate of a hydrophilic polymer and a hydrophobic polymer, the proportions between these two polymers governing the degree of expansion .
• the material expands by absorbing water from the body fluid.
• cross-linked polyacrylamide and polymers and co-polymers of methacrylic acid esters having at least one hydroxy group in the side chain Suitable monomers are 2-hydroxy- ethyl-methacrylate , where the ester group can originate from diethylene glycol or triethylene glycol. It is for example also feas ⁇ ible to use 2,3-dihydro oxy propyl methacrylate. It is possible to use, as the cross-linking substance, polyfunctional acrylates such as diesters or corresponding glycols, e.g. ethylene glycol, bis- methacrylate .
• the material in the body should be quite elastic and should be only very slightly plastic. In the unexpended (non-hyd- rated) state it can be rigid and/or hard but should preferably sof ⁇ ten on expansion.
• the body 8 is essentially cylindrical and has a length such that it leaves the wings 5 free to adopt an un- tensioned position.
• the body 8 must not be attached to the thread 3, but instead on expansion certain portions of it should be capable of movement with respect to the thread.
• Fig. 2 and designated as 9 there is also an outer plate 10, a locking device 11 with wings 12 and an inner plate 13 together with an expandable body. 14, preferably of a hydrogel.
• the plate 13 carries wings 15 which resemble the wings 12 and are directed obliquely outward and which face towards the body 14 like the wings 12.
• the said components are not held together by any thread, but comprise a single piece, preferably a piece moulded in plastic, and are held together by a rod 16 which forms part of this piece, and which thus replaces the thread 3 between the plate 2 and the plate 6 (Fig. 1) .
• a free thread 17 the end of which is attached in plate 13 and which is appropriately moulded into the latter and thus into the whole of the said body formed by components 10-13 and 15, 16.
• the sealing arrangements 1, 9 are in accordance with Figs . 1 and 2 in an initial state provided with an insertion arrangement 18.
• This consists firstly of an outer tube 19, which can obtain support against the plates 2 and 10 respectively and surrounds the entire arrangement.
• the tube 19 has two colours and exhibits a separating line 20 between the two colours.
• the tube 19 is provided with a first zone nearest the arrangement 1, 9 having a certain colour and a second, outer zone in the second colour.
• colour it is not meant that the material in the tube 19, which is appropriately made of plastic, needs to be coloured in both zones, but that one zone can have the natural colour of the material.
• This tube 21 which surrounds the thread 7 and 17 respectively. This tube 21 is longer than the tube 19 and thus extends beyond the end of the tube 19 as shown in Fig. 5.
• Blocking takes place by inserting the expandable body in the unexpended state into the body canal concerned.
• the shape and dimensions of the body are so matched that it can be easily intro ⁇ quizzed into the canal. After introduction it absorbs liquid from the surrounding tissues and expands . By this means the canal is blocked as intended, whilst at the same time the body is firmly gripped in the canal as a result of the pressure against the sur ⁇ rounding w ⁇ alls.
• the material should essentially be inert with res-
• OMPI pect to body fluids and the surrounding tissues , so that the body remains intact and can be removed when it has performed its function .
• An important application of the arrangement is as a preventive agent for blocking the oviducts in a female or a female animal, or for blocking the sperm ducts in a man or a male animal.
• the diameter of the tube 19 which encloses the actual blocking arrangement must not exceed 2 mm and for insertion in the sperm duct of a man the diameter should not exceed 1 mm .
• the arrangement 1 , 9 is enclosed by the .tube 19 and should thus have a somewhat smaller diameter in the non-expanded state . After expansion the body 8 will have increased its diameter preferably by at least 40%, and appro ⁇ priately by 80%.
• Fig. 5 illustrates application in a woman's oviduct.
• the dia ⁇ gram shows the neck of the uterus 22 and the uterus 23 together with the two oviducts 24 and 25.
• On the left an arrangement 1 is shown schematically inserted in the oviduct 24 some distance inside the latter's entrance to the uterus 23. From the arrangement 1 the thread 7 extends outwards through the neck of the uterus 22 so that it can be observed to check whether the arrangement is still in place . At the same time the thread 7 can be employed to remove the arrangement.
• the ar ⁇ rangement is placed horizontally in the tube 19, as illustrated in Fig. 1 , and together with the tubes 19 and 21 is inserted through the neck of the uterus 22 through the uterus 23 and into the ovi ⁇ duct 25.
• the tube 19 is inserted to such an extent that its initial coloured zone disappears into the oviduct.
• the separating line 20 between the zones is located roughly in the range wftere the oviduct enters the uterus . It is possible to observe by means of a hystroscope during insertion, that this location of the separating line has been achieved.
• the tube 19 is withdrawn , as can be seen extended through the neck of the uterus .
• the inner tube 21 which is relatively rigid is held. This prevents the arrangement 1 accompanying the
• the basic idea of the invention is to employ the expan ⁇ dable body for splaying out locking devices .
• This principle can also be employed for sealing off body channels other than those men ⁇ tioned, for example in connection with haemorrhages for sealing off blood vessels .
• the design must be adapted to suit the application envisaged. It is possible to use one or several rows of locking devices and also one or more ex ⁇ pandable bodies .
• the insertion arrangement described is employed naturally only when required.

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)
• Prostheses (AREA)
• Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
• Surgical Instruments (AREA)
• Particle Accelerators (AREA)
• Feeding And Controlling Fuel (AREA)
• External Artificial Organs (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=20344119

Family Applications (1)

Country Status (8)

Families Citing this family (8)

Family Cites Families (4)

• 1981
  • 1981-06-22 SE SE8103903A patent/SE8103903L/ not_active Application Discontinuation
• 1982
  • 1982-06-16 JP JP57502043A patent/JPS58500979A/ja active Pending
  • 1982-06-16 EP EP82901991A patent/EP0094390A1/en not_active Withdrawn
  • 1982-06-16 WO PCT/SE1982/000218 patent/WO1983000011A1/en unknown
  • 1982-06-21 ES ES514346A patent/ES8400025A1/es not_active Expired
  • 1982-06-21 IT IT21972/82A patent/IT1152981B/it active
• 1983
  • 1983-02-21 NO NO830596A patent/NO830596L/no unknown
  • 1983-02-22 DK DK78283A patent/DK78283A/da not_active Application Discontinuation

Non-Patent Citations (1)

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