US3900033A - Dilator for cervical canal - Google Patents

Dilator for cervical canal Download PDF

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Publication number
US3900033A
US3900033A US338697A US33869773A US3900033A US 3900033 A US3900033 A US 3900033A US 338697 A US338697 A US 338697A US 33869773 A US33869773 A US 33869773A US 3900033 A US3900033 A US 3900033A
Authority
US
United States
Prior art keywords
canal
diameter
fluid
dilatation
envelope
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.)
Expired - Lifetime
Application number
US338697A
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English (en)
Inventor
Robert Irvin Leininger
Joseph Ronald Preston
Brenton Ray Lower
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.)
Ortho Pharmaceutical Corp
Original Assignee
Ortho Pharmaceutical Corp
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
Application filed by Ortho Pharmaceutical Corp filed Critical Ortho Pharmaceutical Corp
Priority to US338697A priority Critical patent/US3900033A/en
Priority to CA193,585A priority patent/CA1046376A/en
Priority to IN424/CAL/74A priority patent/IN139926B/en
Priority to NL7402762A priority patent/NL7402762A/xx
Priority to GB932474A priority patent/GB1457811A/en
Priority to AU66211/74A priority patent/AU485609B2/en
Priority to PH15571A priority patent/PH10674A/en
Priority to SE7402917A priority patent/SE401319B/xx
Priority to CH315774A priority patent/CH562603A5/xx
Priority to SU2009220A priority patent/SU535885A3/ru
Priority to IE467/74A priority patent/IE39335B1/xx
Priority to ZA00741466A priority patent/ZA741466B/xx
Priority to NO740780A priority patent/NO134605C/no
Priority to FR7407632A priority patent/FR2220284B1/fr
Priority to IL44363A priority patent/IL44363A/en
Priority to BR1695/74A priority patent/BR7401695D0/pt
Priority to JP49025817A priority patent/JPS49126196A/ja
Priority to DE2410933A priority patent/DE2410933A1/de
Priority to AR252686A priority patent/AR197859A1/es
Priority to BE141775A priority patent/BE812023A/xx
Priority to US05/579,631 priority patent/US4137922A/en
Application granted granted Critical
Publication of US3900033A publication Critical patent/US3900033A/en
Priority to IN802/CAL/76A priority patent/IN142198B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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, e.g. tourniquets
    • A61B17/42—Gynaecological or obstetrical instruments or methods
    • A61B2017/4216—Operations on uterus, e.g. endometrium
    • A61B2017/4225—Cervix uteri

Definitions

  • ABSTRACT A novel inflatable device is disclosed for use in dilating various body cavities, and especially the human cervix, comprising an envelope member having an enlarged bulbous portion on one end, and a shield at the opposite end.
  • the envelope member is inflatable with suitable gases such as carbon dioxide, or liquids such as saline, distilled water and the like.
  • the human cervix is a canal having an inner and outer restricted s and varying in length from individual to individual, but usually of the order of about 2 centimeters.
  • the canal itself is more elastic than either the inner or the outer 0s and as between the two, the inner 05 is much more restricted and intractable to dilatation than the outer 0s.
  • Hegar dilators a series of solid, rodlike instruments of graduated diameter used in a serial fashion by the physician.
  • the physician first inserts a Hegar dilator of low cross sectional area, removes the dilator and replaces it with the dilator of next higher cross sectional area. He continues this until adequate dilatation occurs. This normally takes two or three minutes and is usually accompanied by a distressing amount of pain and discomfort for the patient.
  • Anesthetics are generally required but are not altogether satisfactory.
  • a general anesthetic has the disadvantage of requiring the presence of an anesthesiologist, thus complicating the procedure.
  • the patient When local anesthetics are used, the patient nevertheless frequently experiences a great amount of discomfort from the procedure. This is probably caused by the disproportionate amount of large longitudinal force required to achieve the relatively small amount of transverse force necessary to produce adequate dilatation. Administration of the local is itself not without discomfort.
  • a dilatation device which relatively painlessly and effortlessly produces dilatation of a body canal, especially the cervical canal, when employed by one practitioner only.
  • FIG. 1 shows a specific embodiment of the device of the invention.
  • FIGS. 2 and 3 show the position of the device in place in a cervix
  • FIG. 4 shows a modification of the present device.
  • FIG. 1 there is depicted at l a typical dilator of the present invention in inflated form but outside the body canal.
  • the device comprises an inserter tube 2 shrouded by a collapsible, relatively non-expansible envelope 3 having (in its non-collapsed form) a relatively constant cross sectional diameter.
  • Envelope 3 is attached at one of its ends to shield 4 and is engaged in fluid tight relationship with the insertion tube 2 and shield 4.
  • extension tube 5 Projecting through shield 4 and coordinating with tube 2 is extension tube 5.
  • the device is inserted in a manner described in more detail herein below, such that the shield 4 is the proximal end and enlarged portion 6 represents the distal end.
  • Tube 2 is provided with preferably a plurality of ports 7 so that gas or liquid may be transmitted through the tube into the envelope 3.
  • Tube 5 is connected to a source of fluid pressure (not shown) preferably a chemically inert, physiologically acceptable fluid such as carbon dioxide, saline solution, distilled water, and the like.
  • device I is inserted into the human cervix without prior dilatation.
  • the distance between the shield 4 and enlarged portion 6 is sufficient to permit contact along tyhe entire length of the cervix by tube 3 including the inner 0s 9 and outer 0s 8.
  • FIG. 2 shows the presence of the device of the invention in collapsed form, in place in the cervix to demonstrate that enlarged portion 6 is located beyond the inner os 9.
  • Envelope 3 is preferably 2-3 centimeters long. While the human cervical canal is approximately 2 to 2.5 cm. long, it is desirable to have envelope 3 somewhat longer to ensure adequate occlusion. For devices used to dilate other canals, appropriate changes in dimension may be made as desired.
  • the diameter of tube 3 in its collapsed state be of the order of 2 4 millimeters.
  • Tube 2 preferably provided as a rigid or semirigid member such as plastic, stainless steel and the like, being shrouded with a small diametere envelope, may then be easily inserted.
  • the end of tube 2 comes into close proximity with the end of enlarged portion 6 although in FIGS. 1 and 2 it is shown at a significant distance therefrom.
  • Envelope 3 is made of a relatively non-elastic nonexpansible material such as a polyurethane, polyvinylchloride or polyethylene vinyl acetate copolymer.
  • a relatively non-elastic nonexpansible material such as a polyurethane, polyvinylchloride or polyethylene vinyl acetate copolymer.
  • thermoplastic polyurethanes having a molecular weight of 20,000 to 80,000 and preferably 40,000 to 50,000 such as those available under the trade name of Roylar E-9 from the Uniroyal Corporation.
  • Relative non-elasticity in the device in the present invention is important for two reasons. Since both the inner and outer ora are more intractable toward dilatationn than the main part of the cervical canal, any member which is relatively elastic will tend to dilate the inner portion preferentially.
  • FIG. 3 shows the placement of the device in the cervix following inflation.
  • Both inner 0s 9 and outer 0s 8 are dilated to approximately the same degree. Following administration in the manner described, and when the patient is sufficiently dilated, the device may be removed and the patient treated in accordance with her medical indications. Oftentimes, the degree of dilatation is so satisfactory that the device may be freely moved in and removed from the cervical canal without venting the systern.
  • shield 4 should be from I 2 centimeters, and preferably 1.5 centimeters; tube 3 from 8 14 millimeters and preferably 10 l2 millimeters in diameter in filled form and from 1.5-4 millimeters and preferably 2-3 millimeters in collapsed form; and tube 2 and tube 5 of the order of l 1.5 millimeters in diameter.
  • these dimensions should be increased and a sufficient amount of flexibility will be provided within each member so as to minimize the risks of perforation.
  • port 7 need not necessarily be located on the side but may be present as the open end of tube 2.
  • the seal between shield 4 and envelope 3 may be either at a point located on the shield itself away from the entry point of tube 2, or indeed, may be located at a point on tube 2 away from shield 4. Similar modifications may be employed.
  • the device of the present invention is also uniquely suited to being used as a drug delivery system and thus dilatation and therapy can be accomplished simultaneously. Additionally, under some circumstances, it may not be necessary to dilate to any significant degree at all.
  • An illustration of the former case is represented by a device I wherein enlarged portion 6 is impregnated with a suitable medicament. Dilatation of the cervix would then be accomplished by a slow leaching of the medicament from the device itself. This could be an important adjunct to the use of abortifacients and labor inducers.
  • envelope 3 may itself be impregnated with a drug so that contact with the cervi cal canal results in high local concentrations of medicament.
  • enlarged portion 6 may be fabricated with one or more depressions 10 as is shown in FIG. 4. 'll'lis depression may be filled with medicament. When the device is inserted and fluid pressure applied, the pressure will force the depression 10 and cause the release of the medicament into the uterus.
  • a dilator of the type described in FIGS. 1 and 2 EXAMPLE I The patient was l6 years old. of zero parity and 6 weeks gestational age. No anesthesia was used because of a known allergic history. Pressurization at 4.5 psig for 3 minutes produced some cramping but less discomfort than use of the tenaculum and much less than produced by subsequent evacuation of the uterus by aspiration. After removal of the dilator, an 8 millimeter curette could be introduced with only slight resistance.
  • EXAMPLE ll The patient was 19 years old. of zero parity and 7 weeks gestational age. Pressurization at 5 psig for 2 minutes followed by 6 psig for another 2 minutes produced no discomfort. Final dilatation was somewhat more than 9 millimeters.
  • EXAMPLE Ill The patient was 24 years old, of zero parity and 8 weeks gestational age. There was some discomfort at 5 psig pressure which diminished after the first 2 minutes. After a total of 3 minutes at 5 psig, pressure was increased to 6 psig for l more minute. The final size was 9 millimeters. The unusual amount of time required for dilatation here was caused by a very firm cervix.
  • EXAMPLE IV The patient was years old, of zero parity and 7 weeks gestational age. Pressurization was 6 psig for 1 minute followed by 7 psig for 2 additional minutes. There was no discomfort noted and the final size was 9 millimeters.
  • EXAMPLE V The patient was 21 years old, of zero parity and 8 weeks gestational age. After 3 minutes at 6 psig dilatation was 9 millimeters.
  • Example I the inflated dilator could be easily moved in the cervical canal even to complete withdrawal and reinsertion with no discomfort. While this was not possible in Example l, the presence of a very firm cervix in the patient necessitated venting in order to achieve a zero discomfort level for removal.
  • a body canal dilating device comprising a relatively non-elastic, non-expansible, collapsible, inflatable envelope, having two portions, the first said portion in the inflated state having a relatively constant diameter and a length sufficient to occlude a canal having more than one 05, and the other of said portions contiguous with the first said portion and being a terminal enlarged bulbous portion having a diameter in excess of said constant diameter in the inflated state, a tubular inserter member entering the first said portion and while inside thereof extending therethrough and into the inside of the other of said portions, a shield located in proximity of the entrance to the first said portion and engaged with said tubular member, said tubular member being adapted to permit entry into said envelope of a pressurizing fluid.
  • the device of claim 4 wherein the first portion and sid terminal enlarged bulbous portion are polyurethane having a molecular weight of between 20,000 and 80,000.
  • tubular inserter member is at least semirigid.
  • the method for dilating a body canal which comprises inserting the device of claim 6 into a body canal and directing the flow ofa fluid into said device to pressurize the device thereby and to cause consequent dilatation of said body canal.

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  • Health & Medical Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • General Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Public Health (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Anesthesiology (AREA)
  • Engineering & Computer Science (AREA)
  • Vascular Medicine (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)
  • Media Introduction/Drainage Providing Device (AREA)
  • Surgical Instruments (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Materials For Medical Uses (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
US338697A 1973-03-07 1973-03-07 Dilator for cervical canal Expired - Lifetime US3900033A (en)

Priority Applications (22)

Application Number Priority Date Filing Date Title
US338697A US3900033A (en) 1973-03-07 1973-03-07 Dilator for cervical canal
CA193,585A CA1046376A (en) 1973-03-07 1974-02-27 Dilator for cervical canal
IN424/CAL/74A IN139926B (pt) 1973-03-07 1974-02-28
NL7402762A NL7402762A (pt) 1973-03-07 1974-02-28
GB932474A GB1457811A (en) 1973-03-07 1974-03-01 Medical dilator
AU66211/74A AU485609B2 (en) 1973-03-07 1974-03-01 Surgical lila tor
PH15571A PH10674A (en) 1973-03-07 1974-03-04 Dilator for cervical canal
SE7402917A SE401319B (sv) 1973-03-07 1974-03-05 Anordning for utvidgande av kroppskanaler
ZA00741466A ZA741466B (en) 1973-03-07 1974-03-06 Novel dilator
IE467/74A IE39335B1 (en) 1973-03-07 1974-03-06 Medical dilator
CH315774A CH562603A5 (pt) 1973-03-07 1974-03-06
NO740780A NO134605C (pt) 1973-03-07 1974-03-06
FR7407632A FR2220284B1 (pt) 1973-03-07 1974-03-06
IL44363A IL44363A (en) 1973-03-07 1974-03-06 Body canal dilating device
SU2009220A SU535885A3 (ru) 1973-03-07 1974-03-06 Устройство дл расширени каналов тела человека
JP49025817A JPS49126196A (pt) 1973-03-07 1974-03-07
BR1695/74A BR7401695D0 (pt) 1973-03-07 1974-03-07 Dispositivo para dilatar um canal do corpo
DE2410933A DE2410933A1 (de) 1973-03-07 1974-03-07 Dehnsonde zur erweiterung von koerperhoehlen
AR252686A AR197859A1 (es) 1973-03-07 1974-03-07 Dispositivo dilatador de un canal del cuerpo
BE141775A BE812023A (fr) 1973-03-07 1974-03-07 Dilatateur nouveau
US05/579,631 US4137922A (en) 1973-03-07 1975-05-21 Dilator for cervical canal
IN802/CAL/76A IN142198B (pt) 1973-03-07 1976-05-07

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US338697A US3900033A (en) 1973-03-07 1973-03-07 Dilator for cervical canal

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US05/579,631 Continuation-In-Part US4137922A (en) 1973-03-07 1975-05-21 Dilator for cervical canal

Publications (1)

Publication Number Publication Date
US3900033A true US3900033A (en) 1975-08-19

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US338697A Expired - Lifetime US3900033A (en) 1973-03-07 1973-03-07 Dilator for cervical canal
US05/579,631 Expired - Lifetime US4137922A (en) 1973-03-07 1975-05-21 Dilator for cervical canal

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Application Number Title Priority Date Filing Date
US05/579,631 Expired - Lifetime US4137922A (en) 1973-03-07 1975-05-21 Dilator for cervical canal

Country Status (18)

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US (2) US3900033A (pt)
JP (1) JPS49126196A (pt)
AR (1) AR197859A1 (pt)
BE (1) BE812023A (pt)
BR (1) BR7401695D0 (pt)
CH (1) CH562603A5 (pt)
DE (1) DE2410933A1 (pt)
FR (1) FR2220284B1 (pt)
GB (1) GB1457811A (pt)
IE (1) IE39335B1 (pt)
IL (1) IL44363A (pt)
IN (1) IN139926B (pt)
NL (1) NL7402762A (pt)
NO (1) NO134605C (pt)
PH (1) PH10674A (pt)
SE (1) SE401319B (pt)
SU (1) SU535885A3 (pt)
ZA (1) ZA741466B (pt)

Cited By (19)

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US4137922A (en) * 1973-03-07 1979-02-06 Ortho Pharmaceutical Corp. Dilator for cervical canal
US4261339A (en) * 1978-03-06 1981-04-14 Datascope Corp. Balloon catheter with rotatable support
US4327709A (en) * 1978-03-06 1982-05-04 Datascope Corp. Apparatus and method for the percutaneous introduction of intra-aortic balloons into the human body
US4338943A (en) * 1979-05-14 1982-07-13 Fuji Latex Co., Ltd. Instrument for induction of labor
WO1985000100A1 (en) * 1983-06-24 1985-01-17 Project U Improved endometrial cytologic sampling apparatus and method
US4762127A (en) * 1987-04-15 1988-08-09 The Montefiore Hospital Association Of Western Pennsylvania Apparatus and method for enlarging the ends of a vessel prior to anastomosis
US5312430A (en) * 1986-12-09 1994-05-17 Rosenbluth Robert F Balloon dilation catheter
US5527336A (en) * 1986-12-09 1996-06-18 Boston Scientific Corporation Flow obstruction treatment method
US5545122A (en) * 1994-10-12 1996-08-13 Spruill; Theresa Inflatable speculum
US20040127931A1 (en) * 2002-08-09 2004-07-01 Geoffrey Kincaid Cervical dilator
WO2005084745A1 (en) * 2004-03-08 2005-09-15 Medilator Catheter and method for dilating a body passageway
US20060178692A1 (en) * 2002-05-15 2006-08-10 Alexander Condrea Dilator for body passageway
US20070032814A1 (en) * 2002-11-21 2007-02-08 Hibler Timothy B Cervical Medical Device, System and Method
US20090209973A1 (en) * 2005-06-10 2009-08-20 East Michael C Surgical apparatus and the use thereof
US20100010530A1 (en) * 2006-07-14 2010-01-14 Ams Research Corporation Balloon Dilation for Implantable Prosthesis
US20100082057A1 (en) * 2008-09-30 2010-04-01 Borkon William D Variable rigidity vaginal dilator and use thereof
US20150099011A1 (en) * 2001-09-25 2015-04-09 Jenny Colleen McCloskey Inactivation of papillomavirus
US20170340868A1 (en) * 2015-09-21 2017-11-30 Beijing Unikangtong Medicine Technology Co., Ltd Prostate dilation catheter
US11648380B2 (en) 2017-12-05 2023-05-16 Jenny Colleen McCloskey Device for treatment of a body canal and adjacent surfaces

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NZ180784A (en) * 1975-05-21 1978-06-20 Ortho Pharma Corp Body canal dilating device
JPS5545353Y2 (pt) * 1976-03-02 1980-10-24
IT1088048B (it) * 1977-11-29 1985-06-04 Magnasco Dante Divaricatore per applicazioni in campo medico
DE2813215C3 (de) * 1978-03-25 1982-01-28 Rolf 3500 Kassel Thomas Mit Luftdruck aufblasbarer flexibler Formkörper zur Anpassung an auszudehnende menschliche und tierische Höhlungen
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NL7907774A (nl) * 1979-10-22 1981-04-24 Arnoldus Theodorus Maria Van D Gewapende cervixdilatatie en weerstandsmeting-ballon.
US4237893A (en) * 1979-11-28 1980-12-09 Alza Corporation Cervical dilator
US4552557A (en) * 1983-10-21 1985-11-12 Avvari Rangaswamy Inflatable uterine hemostat
US4669478A (en) * 1985-03-21 1987-06-02 Robertson Jack R Device for diagnosing and relieving female incontinence
US5133732A (en) 1987-10-19 1992-07-28 Medtronic, Inc. Intravascular stent
US4949718B1 (en) * 1988-09-09 1998-11-10 Gynelab Products Intrauterine cauterizing apparatus
US6344053B1 (en) 1993-12-22 2002-02-05 Medtronic Ave, Inc. Endovascular support device and method
US5065772A (en) * 1989-10-13 1991-11-19 Inamed Corporation Inflatable cerivical pessary
ES2020435A6 (es) * 1990-02-15 1991-08-01 Frontela Carreras Luis Procedimiento y dispositivo para la exploracion y medida del himen.
US5549559A (en) 1990-03-22 1996-08-27 Argomed Ltd. Thermal treatment apparatus
US5571153A (en) * 1991-09-20 1996-11-05 Wallst+E,Acu E+Ee N; Hans I. Device for hyperthermia treatment
US5382261A (en) * 1992-09-01 1995-01-17 Expandable Grafts Partnership Method and apparatus for occluding vessels
US6849063B1 (en) 1994-03-11 2005-02-01 Wit Ip Corporation Thermal treatment apparatus
US6187346B1 (en) 1995-06-07 2001-02-13 Ablation Products, Inc. Intrauterine chemical cauterizing method and composition
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US5891457A (en) * 1997-05-12 1999-04-06 Neuwirth; Robert S. Intrauterine chemical necrosing method, composition, and apparatus
US6893430B2 (en) * 1998-02-04 2005-05-17 Wit Ip Corporation Urethral catheter and guide
US6673008B1 (en) 1998-04-28 2004-01-06 Ronald J. Thompson Fallopian tube and method of in vitro fertilization and embryo development
US20020058674A1 (en) 1999-01-08 2002-05-16 Hedenstrom John C. Systems and methods for treating a mucosal surface
US6695859B1 (en) * 1999-04-05 2004-02-24 Coalescent Surgical, Inc. Apparatus and methods for anastomosis
US6716252B2 (en) 2000-06-30 2004-04-06 Wit Ip Corporation Prostatic stent with localized tissue engaging anchoring means and methods for inhibiting obstruction of the prostatic urethra
US20050165427A1 (en) * 2004-01-22 2005-07-28 Jahns Scott E. Vessel sealing devices
US7947207B2 (en) 2005-04-12 2011-05-24 Abbott Cardiovascular Systems Inc. Method for retaining a vascular stent on a catheter
US20070276314A1 (en) * 2006-05-26 2007-11-29 Becker Bruce B Nasolacrimal duct probing, intubating and irrigating device
ITVI20070180A1 (it) 2007-06-21 2008-12-22 Slavica Slatinac Dilatatore uterino di tipo monouso
US8123773B1 (en) * 2008-09-10 2012-02-28 Utah Medical Products Inc. Postpartum hemorrhage balloon tamponade catheter
JP2012505050A (ja) 2008-10-10 2012-03-01 インターバルブ， インコーポレイテッド 弁形成術用カテーテルおよび方法
US20230293204A1 (en) * 2021-08-18 2023-09-21 Celestial Life Sciences, Llc Cervical dilator

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US2494393A (en) * 1949-02-05 1950-01-10 Otis F Lamson Removable appliance for use as an artificial dam in cases of rectal incontinence
US2667875A (en) * 1951-03-30 1954-02-02 American Cystoscope Makers Inc Inflatable retention catheter
US3095871A (en) * 1960-01-26 1963-07-02 Edward C Mann Method for determining the condition of the uterine isthmus
US3585983A (en) * 1968-03-05 1971-06-22 Adrian Kantrowitz Cardiac assisting pump
US3626949A (en) * 1969-01-23 1971-12-14 Wallace B Shute Cervical dilator
US3799170A (en) * 1972-05-31 1974-03-26 M Walsh Therapeutic dilator, disposable or reusable

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US1735519A (en) * 1926-07-17 1929-11-12 Arlyn T Vance Physician's dilator
GB328598A (en) * 1929-01-28 1930-04-28 Electro Thermal Company Improvements in dilators
US2499045A (en) * 1948-08-16 1950-02-28 Walker Frank Ray Rectal dilator and medicator
US3046988A (en) * 1958-12-01 1962-07-31 Davol Rubber Co Esophageal nasogastric tube
US3480017A (en) * 1966-04-27 1969-11-25 Wallace B Shute Cervical dilator
US3460017A (en) * 1967-01-16 1969-08-05 Reliance Electric & Eng Co Solid state trigger for scr
US3848602A (en) * 1972-04-19 1974-11-19 Gutnick Morton Abortion facilitating device and process
US3900033A (en) * 1973-03-07 1975-08-19 Ortho Pharma Corp Dilator for cervical canal
US3882852A (en) * 1974-01-11 1975-05-13 Manfred Sinnreich Surgical dilators having insufflating means

Patent Citations (8)

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Publication number Priority date Publication date Assignee Title
US1282881A (en) * 1917-07-07 1918-10-29 John T Landis Pneumatic dilator.
US1690995A (en) * 1927-12-28 1928-11-06 Monte Lloyd Corp Anorectal dilator
US2494393A (en) * 1949-02-05 1950-01-10 Otis F Lamson Removable appliance for use as an artificial dam in cases of rectal incontinence
US2667875A (en) * 1951-03-30 1954-02-02 American Cystoscope Makers Inc Inflatable retention catheter
US3095871A (en) * 1960-01-26 1963-07-02 Edward C Mann Method for determining the condition of the uterine isthmus
US3585983A (en) * 1968-03-05 1971-06-22 Adrian Kantrowitz Cardiac assisting pump
US3626949A (en) * 1969-01-23 1971-12-14 Wallace B Shute Cervical dilator
US3799170A (en) * 1972-05-31 1974-03-26 M Walsh Therapeutic dilator, disposable or reusable

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4137922A (en) * 1973-03-07 1979-02-06 Ortho Pharmaceutical Corp. Dilator for cervical canal
US4261339A (en) * 1978-03-06 1981-04-14 Datascope Corp. Balloon catheter with rotatable support
US4327709A (en) * 1978-03-06 1982-05-04 Datascope Corp. Apparatus and method for the percutaneous introduction of intra-aortic balloons into the human body
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US4338943A (en) * 1979-05-14 1982-07-13 Fuji Latex Co., Ltd. Instrument for induction of labor
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Also Published As

Publication number Publication date
AR197859A1 (es) 1974-05-10
NL7402762A (pt) 1974-09-10
IL44363A (en) 1976-09-30
JPS49126196A (pt) 1974-12-03
FR2220284A1 (pt) 1974-10-04
US4137922A (en) 1979-02-06
NO134605B (pt) 1976-08-09
FR2220284B1 (pt) 1977-09-23
SU535885A3 (ru) 1976-11-15
BE812023A (fr) 1974-09-09
GB1457811A (en) 1976-12-08
PH10674A (en) 1977-08-05
IE39335L (en) 1974-09-07
DE2410933A1 (de) 1974-09-12
IL44363A0 (en) 1974-06-30
NO134605C (pt) 1976-11-17
IE39335B1 (en) 1978-09-13
IN139926B (pt) 1976-08-21
CH562603A5 (pt) 1975-06-13
AU6621174A (en) 1975-09-04
ZA741466B (en) 1975-10-29
SE401319B (sv) 1978-05-02
BR7401695D0 (pt) 1974-12-03

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