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WO1994026344A1 - Dispositif de dilation non traumatique du canal cervical - Google Patents

Dispositif de dilation non traumatique du canal cervical Download PDF

Info

Publication number
WO1994026344A1
WO1994026344A1 PCT/IT1994/000053 IT9400053W WO9426344A1 WO 1994026344 A1 WO1994026344 A1 WO 1994026344A1 IT 9400053 W IT9400053 W IT 9400053W WO 9426344 A1 WO9426344 A1 WO 9426344A1
Authority
WO
WIPO (PCT)
Prior art keywords
expansion device
rod
metal point
point elements
conical
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.)
Ceased
Application number
PCT/IT1994/000053
Other languages
English (en)
Inventor
Fabrizio Forgione
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TRE F STRUMENTI CHIRURGICI Srl
Original Assignee
TRE F STRUMENTI CHIRURGICI Srl
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from IT93RM000299A external-priority patent/ITRM930299A1/it
Priority claimed from ITRM930637A external-priority patent/IT1261934B/it
Application filed by TRE F STRUMENTI CHIRURGICI Srl filed Critical TRE F STRUMENTI CHIRURGICI Srl
Priority to AU68068/94A priority Critical patent/AU6806894A/en
Publication of WO1994026344A1 publication Critical patent/WO1994026344A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M29/00—Dilators with or without means for introducing media, e.g. remedies
    • A61M29/02—Dilators made of swellable material
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/42—Gynaecological or obstetrical instruments or methods
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B2017/00535—Surgical instruments, devices or methods pneumatically or hydraulically operated
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/06—Measuring instruments not otherwise provided for

Definitions

  • the present invention relates to an expansion device of the cervical canal , which is introduced in said canal for example for diagnostic purposes, in the interruption of pregnancy, in all surgical operations which need the execution of the dilation of the cervical canal , etc. , and more particularly the invention relates to a non- traumatic expansion device, which after having been introduced in the cervical canal , allows to enlarge the latter progressively by exerting only radial pressures, and which therefore does not need to be extracted and inserted in the period of time within the single steps of the dilation operation.
  • Hegar expanders are made of steel which can be sterilized in an autoclave, for example, or they are made of plastics and can be disposed of after use. They form a set of cylindrical instruments with a rounded point and a smooth surface, each one having an increased diameter with respect to a foregoing of the set.
  • the object of the present invention is to eliminate the foregoing disadvantages, providing an expansion device whose introduction in the cervical canal requires only a moderate force, so that only one Museux pliers is requi red .
  • Another object of the present invention is to provide an expansion device which exerts only radial pressures, so that it will be introduced only once into the cervical canal , and this will involve several advantages as regards a non-traumatic execution of the dilation operati on .
  • Fig. la a longitudinal sectional view of the expansion device in the condition in which it is introduced in the cervi cal canal ;
  • Fig. lb a front view of the expansion device shown in Fig. la, in the direction of the arrow A;
  • Fig. 2a a longitudinal sectional view of the expansion device, in the condition in which it is extracted from the cervical canal after the dilation operation;
  • Fig. 2b a front view of the expansion device shown in Fig. 2a, in the direction of the arrow B;
  • Fig. 3 a perspective view of the expansion device in the condition in which it is introduced into the cervi cal canal ;
  • Fig. 4 a perspective view of only the front part of the expansion device, in the condition in which it is extracted from the cervical canal ;
  • Fig. 5 a longitudinal sectional view of a second embodiment of the expansion device according to the invention, in the condition in which the expansion device is introduced into the cervical canal ;
  • Fig. 6 a longitudinal sectional view of a second embodiment of the expansion device of the invention, in the condition in which it is extracted from the cervical canal ;
  • Fig. 7 the expansion device of the invention, with metal point elements whose ends define a cylinder of greater diameter than that of the expansion devices of Figs. 1 to 6.
  • the expansion device 1 comprises a tubular element 2 with a knurled surface in order to facilitate the grasp, and with three slits 3a, 3b, 3c.
  • the slits 3a, 3b, 3c having a rectangular shape, terminate at the end 4 of the tubular element 2 and respectively at three intermediate points 5 arranged at the same level along the tubular element 2.
  • Said three slots 3a, 3b, 3c are arranged at an angular distance of 120° from each other.
  • an ensemble of components 6 which includes a rod 7 integral with conical parts 8a, 8b, and three metal point elements 9a, 9b, 9c which are inserted in three seats which are defined by the above mentioned slits 3a, 3b, 3c.
  • the metal point elements 9a, 9b, 9c are therefore also located in said slits 3a, 3b, 3c, so as to define three sectors of 120°, as clearly shown in Figs, lb and 2b.
  • the ensemble of components 6, which is inserted in the direction of the arrow A (or B) in the tubular element 2, comprises also a conical element 10 having a first axial bore 11, through which passes the rod 7, the latter having a conical point 12.
  • the conical element 10 is fixed by means of screws (not shown) to the upper end 4 of the tubular element 2.
  • the end of the rod 7 opposite to the conical point 12 is slidingly inserted into a hollow cylindrical portion 13 integral with a cylindrical knob 14, which is knurled on its outer periphery.
  • the cylindrical knob 14 is screwed on the lower end of the tubular element 2, on the outer thread 15 of the latter.
  • the screw 16, which is inserted in an appropriate seat on the bottom of the cylindrical knob 14, is screwed from the outside in a second axial bore 17 obtained at the lower end of the rod 7.
  • the metal point elements 9a, 9b, 9c are pushed radially out of the tubular element 2 when the cylindrical knob 14 is completely screwed, whereas, when the latter is screwed out until it has reached the position of Fig. la, the metal point elements 9a, 9b, 9c are pulled inwardly, inside the tubular element 2.
  • the metal point elements 9a, 9b, 9c define a cylinder with a rounded point, at the upper end of the expansion device 1, when the latter is in the condition shown in Fig. la, but they also have planar (i .e.
  • the conical part 8a has three guide slots 20b each corresponding to a respective metal point el ement .
  • the stop 23 prevents the knob 14 from being completely screwed out if the screw 16 is not previously screwed out .
  • a washer 40 screwed on the rod 2, at the position shown in the drawings, allows after it has been screwed out, to replace each metal point element 9a, 9b, 9c, by taking it out of the respective guide slot 20a or 20b.
  • the operation of the expansion device is the following: once the upper cylindrical end 31 of the expansion device has been introduced inside the cervical canal , the knob 14 is screwed, so that the conical parts 8a, 8b and the conical point 12 will spread the metal point elements 9a, 9b, 9c.
  • a micrometric readout scale 30 will allow to evaluate the dilation obtained during every step of the di 1 ati on . Since only a single device is used, instead of several instruments as in the case of the Hegar instruments, it is obvious that several advantages will arise, both as regards sterilization, and the successive rearrangement on the operating-table.
  • metal point elements can be mounted, whose ends 31 introduced in the cervical canal will define cylinders of a greater diameter with respect to those of Figs. 1-6.
  • the expansion device can be adapted to the following practical situations:
  • Figs. 5 and 6 show an expansion device which differs from the expansion device of Figs. 1-4, by the fact that the conical parts 8a, 8b do not have guide slots, and the metal point elements are provided with radial projections 32, 33 which cooperate with the conical parts 8a, 8b in order to push the metal point elements out of thei r seats .
  • steel return springs 34, 35 are employed, which cause the metal point elements to return in the position of Fig. 5.
  • the way in which the advancement of the rod 7 is performed/adjusted may be of any kind.
  • the rod 7 may be actuated by an hydraulic device, a pneumatic device or the like, the adjustment being obtained by adjusting the pressure of the actuation fluid in every single step of the dilation of the cervical canal .

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Animal Behavior & Ethology (AREA)
  • Public Health (AREA)
  • Surgery (AREA)
  • General Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Molecular Biology (AREA)
  • Reproductive Health (AREA)
  • Medical Informatics (AREA)
  • Pregnancy & Childbirth (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Gynecology & Obstetrics (AREA)
  • Vascular Medicine (AREA)
  • Anesthesiology (AREA)
  • Hematology (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)

Abstract

Un dispositif utilisé pour dilater le canal cervical comprend un élément (2) et une tige d'actionnement (7) qui est raccordée à un bouton cylindrique (14) vissé sur un filetage (15). La tige (7) comprend des parties coniques (8a, 8b) intégrées à celle-ci et qui poussent les éléments à pointe métallique (9a, 9b, 9c) à l'extérieur du corps creux, dans une direction radiale, dans des fentes (3a, 3b, 3c), coopérant avec un élément conique (10) qui agit comme une butée. Les terminaisons avant (31) des éléments à pointe métallique (9a, 9b, 9c) qui sont introduites dans le canal cervical s'écartent l'une de l'autre dans une direction radiale, provoquant de cette façon la dilatation du canal, d'un diamètre initial (D1) à un diamètre final (D2).
PCT/IT1994/000053 1993-05-10 1994-05-02 Dispositif de dilation non traumatique du canal cervical Ceased WO1994026344A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU68068/94A AU6806894A (en) 1993-05-10 1994-05-02 Non-traumatic expansion device of the cervical canal

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
ITRM93A000299 1993-05-10
IT93RM000299A ITRM930299A1 (it) 1993-05-10 1993-05-10 Apparecchio per la dilatazione del canale cervicale in progressione
ITRM93A000637 1993-09-22
ITRM930637A IT1261934B (it) 1993-09-22 1993-09-22 Dilatatore atraumatico del canale cervicale uterino.

Publications (1)

Publication Number Publication Date
WO1994026344A1 true WO1994026344A1 (fr) 1994-11-24

Family

ID=26332039

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT1994/000053 Ceased WO1994026344A1 (fr) 1993-05-10 1994-05-02 Dispositif de dilation non traumatique du canal cervical

Country Status (2)

Country Link
AU (1) AU6806894A (fr)
WO (1) WO1994026344A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996027323A1 (fr) * 1995-03-07 1996-09-12 John Dumergue Charters Appareil de dilatation d'une cavite du corps
WO1996028083A1 (fr) * 1995-03-09 1996-09-19 Mca Medical Products Pty. Ltd. Speculum
DE102004012109B3 (de) * 2004-03-12 2005-12-22 Fehling Ag Analspreizer

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE151306C (fr) *
DE168467C (fr) * 1900-01-01
US1661563A (en) * 1926-03-01 1928-03-06 Drosselmeyer Frank Douche and syringe
US1737488A (en) * 1928-12-06 1929-11-26 John P Zohlen Dilator
DE2656752A1 (de) * 1976-12-15 1978-06-22 Juergen Dr Med Kynast Geraet zur ausweitung des mutterhalskanals
US4572186A (en) * 1983-12-07 1986-02-25 Cordis Corporation Vessel dilation

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE151306C (fr) *
DE168467C (fr) * 1900-01-01
US1661563A (en) * 1926-03-01 1928-03-06 Drosselmeyer Frank Douche and syringe
US1737488A (en) * 1928-12-06 1929-11-26 John P Zohlen Dilator
DE2656752A1 (de) * 1976-12-15 1978-06-22 Juergen Dr Med Kynast Geraet zur ausweitung des mutterhalskanals
US4572186A (en) * 1983-12-07 1986-02-25 Cordis Corporation Vessel dilation

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996027323A1 (fr) * 1995-03-07 1996-09-12 John Dumergue Charters Appareil de dilatation d'une cavite du corps
US5916151A (en) * 1995-03-07 1999-06-29 Charters; John Dumergue Apparatus for dilating a body cavity
WO1996028083A1 (fr) * 1995-03-09 1996-09-19 Mca Medical Products Pty. Ltd. Speculum
DE102004012109B3 (de) * 2004-03-12 2005-12-22 Fehling Ag Analspreizer

Also Published As

Publication number Publication date
AU6806894A (en) 1994-12-12

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