US3626949A - Cervical dilator - Google Patents

Cervical dilator Download PDF

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US3626949A
US3626949A US793369*A US3626949DA US3626949A US 3626949 A US3626949 A US 3626949A US 3626949D A US3626949D A US 3626949DA US 3626949 A US3626949 A US 3626949A
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bag
peripheral wall
cervix
cervical
inflation
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Wallace B Shute
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    • 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

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  • a cervical dilator comprising a fluidtight bag formed from a flexible material and insertable in a collapsed state into the cervical canal, inlet means in said bag for periodically introducing fluid under pressure to alternately inflate said bag whereby the wall of said bag radially expands to directly contact the walls of said canal and to deflate said bag so as to cause dilatation of the cervix and simulate effects of labor contraction, a portion of the wall of said bag intermediate the ends thereof being adapted to be more resistant to radial expansion whereby to form on inflation of said bag a constricted waist portion which accommodates the edges of the cervix.
  • the present invention relates to a cervical dilator which is adapted to be inserted into the cervical canal and to cause upon inflation and deflation thereof dilation of the cervix so as to simulate the effect of labor contractions and thus hasten the processes of nature.
  • the cervix uteri dilates equally in all directions from a diameter of to centimeters under the pressure of intermittent uterine contractions transmitted through the presenting part (head, breech and/or forebag of water). This dilation permits passage of the baby from the uterine cavity through the pelvis to delivery. Nature however does not produce such labor pains in any regular or standard pattern, since the anatomical and physiological characteristics of all women vary, thus labor can be remarkedly eflicient and short or with noneffective contractions extremely protracted.
  • the present invention provides a simple and relatively inexpensive device which will reproduce the effects of labor pains more efficiently and accurately regulating the dilation of the cervix from 0 to 10 centimeters with safety thus hastening the first stage of labor.
  • a cervical dilator which comprises a fluidtight container formed from a flexible material and insertable in a collapsed state into the cervical canal, inlet means in said container for intennittently introducing fluid under pressure to alternately inflate said container such that a peripheral radial wall of said container expands radially to directly contact the walls of said canal and deflate said bag so as to cause dilatation of the cervix and simulate the effects of labor contractions, the ends of the container being adapted to limit axial expansion of said container during inflation.
  • the ends of the container are adapted to substantially prevent axial expansion of the container on inflation thereof, essentially all the expansion of the container during the dilatation being in a radial direction as axial expansion of the container causes expansion of the container into the uterus of the pregnant women, thereby hindering to a substantial extent the delivery of the baby which is undesirable.
  • the container has a waist portion intermediate the ends thereof and particularly equidistant from the ends thereof which waist portion is of reduced radial dimension for the location of the edges of a cervical os. This allows for the proper positioning of the cervical dilator in the cervical canal when used in simulating the effects of labor contraction.
  • a cervical dilator comprising a fluidtight bag formed from a flexible material and insertable in a collapsed state into the cervical canal, inlet means in said bag for periodically introducing fluid under pressure to alternately inflate said bag whereby the wall of said bag radially expands to directly contact the walls of said canal and deflate said bag so as to cause dilatation of the cervix and simulate effects of labor contraction, a portion of the wall of said bag intermediate the ends thereof being adapted to be more resistant to radial expansion thereby to form on inflation of said bag a constricted waist portion which accommodates the edges of the cervix.
  • the bag which is suitable made of a relatively heavy gauge plastic material such as polyvinyl chloride suitably has embedded in the waist portion a relatively inextensible fiber such as cotton fiber which provides the necessary resistance to expansion of the waist portion which waist portion is suitably equidistant from the ends of the bag and thus on inflation of the bag the waist portion is constricted to accommodate the edges of the cervix.
  • a relatively heavy gauge plastic material such as polyvinyl chloride
  • a relatively inextensible fiber such as cotton fiber which provides the necessary resistance to expansion of the waist portion which waist portion is suitably equidistant from the ends of the bag and thus on inflation of the bag the waist portion is constricted to accommodate the edges of the cervix.
  • the ends of the bag are adapted to restrict axial expansion of the bag during inflation and desirably the ends of the bag allow substantially no axial expansion of the bag on inflation thereof.
  • Inflation and deflation of the bag may suitably be effected by periodically discharging fluid under pressure from a pressure means into said bag through the inlet means, the pressure means being suitably a hydraulic pressure means, the fluid being suitably water.
  • the present invention also provides in combination with the aforesaid cervical dilator of the present invention means for periodically discharging fluid under pressure into said bag through said inlet means to effect inflation or deflation thereof.
  • FIG. 1 is a perspective view of a deflated cervical dilator according to a preferred embodiment of the present invention
  • FIG. 2 is a similar view of the cervical dilator of FIG. 1 in the inflated state.
  • the cervical dilator comprises a bag 1 formed from a flexible plastic material such as polyvinyl chloride sealed along the top and bottom edges thereof so that there is no appreciable axial expansion of the bag on inflation thereof and having an inlet 2 for the periodic introduction of water under pressure into the bag 1 to effect radial inflation and deflation thereof.
  • the bag I has a waist portion 3 which has a continuous thread 4 embedded therein which restricts radial expansion of the waist portion 3 on inflation of the bag 1 (see HO. 2) thus providing accommodation for the edges of the cervix during expansion of the bag 1 and as such avoiding the tendency of the bag I to move axially with respect to the cervix during inflation thereof.
  • a cervical dilator comprising a flattenable, closed end, tubular fluidtight bag formed from a flexible plastic material and insertable in a collapsed state into the cervical canal, inlet and outlet means in said bag for allowing intermittent introduction of fluid under pressure to alternately inflate said bag such that the peripheral tubular sidewall of said bag radially expands to directly contact the walls of said canal and deflate said bag so as to cause dilatation of the cervix and simulate effects of labor contraction, a portion of the peripheral wall of said bag intermediate the ends thereof including relatively inextensible reinforcing means which extend circumferentially of the peripheral wall in radially restraining engagement therewith so as to cause said portion of said peripheral wall to be more resistant to radial expansion than the remainder of said peripheral wall whereby to form on inflation of said bag a constricted waist portion having substantially the same girth when said bag is inflated as when said bag is in said collapsed state and which locates and retains the edges of the cervix when said bag is inflated, the
  • the cervical dilator of claim 1 wherein the bag peripheral wall is formed from polyvinyl chloride and relatively inextensible reinforcing means is a continuous textile thread imbedded in said portion of the peripheral wall.

Abstract

A cervical dilator comprising a fluidtight bag formed from a flexible material and insertable in a collapsed state into the cervical canal, inlet means in said bag for periodically introducing fluid under pressure to alternately inflate said bag whereby the wall of said bag radially expands to directly contact the walls of said canal and to deflate said bag so as to cause dilatation of the cervix and simulate effects of labor contraction, a portion of the wall of said bag intermediate the ends thereof being adapted to be more resistant to radial expansion whereby to form on inflation of said bag a constricted waist portion which accommodates the edges of the cervix.

Description

United States Patent Inventor Wallace 8. Shute 340 McLeod St., Ottawa, Ontario, Canada Appl. No. 793,369 Filed Jan. 23, 1969 Patented Dec. 14, 1971 CERVICAL DILATOR 2 Claims, 2 Drawing Figs.
U.S. Cl 128/344, 128/361 Int. Cl ..A6lm 29/00,
A6 1 b 17/42 Field of Search 128/344, 349 B, 361; 206/D1G. 30
References Cited UNITED STATES PATENTS 9/1952 Edwards l28/349BUX Y Primary Examiner-Channing L. Pace AnorneyCushman, Darby & Cushman ABSTRACT: A cervical dilator comprising a fluidtight bag formed from a flexible material and insertable in a collapsed state into the cervical canal, inlet means in said bag for periodically introducing fluid under pressure to alternately inflate said bag whereby the wall of said bag radially expands to directly contact the walls of said canal and to deflate said bag so as to cause dilatation of the cervix and simulate effects of labor contraction, a portion of the wall of said bag intermediate the ends thereof being adapted to be more resistant to radial expansion whereby to form on inflation of said bag a constricted waist portion which accommodates the edges of the cervix.
CERVICAL DILATOR The present invention relates to a cervical dilator which is adapted to be inserted into the cervical canal and to cause upon inflation and deflation thereof dilation of the cervix so as to simulate the effect of labor contractions and thus hasten the processes of nature.
During labor, the cervix uteri dilates equally in all directions from a diameter of to centimeters under the pressure of intermittent uterine contractions transmitted through the presenting part (head, breech and/or forebag of water). This dilation permits passage of the baby from the uterine cavity through the pelvis to delivery. Nature however does not produce such labor pains in any regular or standard pattern, since the anatomical and physiological characteristics of all women vary, thus labor can be remarkedly eflicient and short or with noneffective contractions extremely protracted. The present invention provides a simple and relatively inexpensive device which will reproduce the effects of labor pains more efficiently and accurately regulating the dilation of the cervix from 0 to 10 centimeters with safety thus hastening the first stage of labor.
ln my Canadian application No. 958,955 I have disclosed and claimed such a cervical dilator which comprises a fluidtight container formed from a flexible material and insertable in a collapsed state into the cervical canal, inlet means in said container for intennittently introducing fluid under pressure to alternately inflate said container such that a peripheral radial wall of said container expands radially to directly contact the walls of said canal and deflate said bag so as to cause dilatation of the cervix and simulate the effects of labor contractions, the ends of the container being adapted to limit axial expansion of said container during inflation. in particular, in my copending Canadian application the ends of the container are adapted to substantially prevent axial expansion of the container on inflation thereof, essentially all the expansion of the container during the dilatation being in a radial direction as axial expansion of the container causes expansion of the container into the uterus of the pregnant women, thereby hindering to a substantial extent the delivery of the baby which is undesirable.
Further, the container has a waist portion intermediate the ends thereof and particularly equidistant from the ends thereof which waist portion is of reduced radial dimension for the location of the edges of a cervical os. This allows for the proper positioning of the cervical dilator in the cervical canal when used in simulating the effects of labor contraction.
It has now been found according to the present invention that by adapting the waist portion intermediate the ends of the container or bag so as to be more resistant to radial expansion than the remainder of the walls of the bag, on inflation of the bag the waist portion is constricted and thus at all times accommodates the edges of the cervical 0s and prevents the bag when under inflation from moving axially into or out of the uterus which is undesirable and thus allows only radial expansion and contraction of the walls of the bag' to take place.
According to the present invention therefore there is provided a cervical dilator comprising a fluidtight bag formed from a flexible material and insertable in a collapsed state into the cervical canal, inlet means in said bag for periodically introducing fluid under pressure to alternately inflate said bag whereby the wall of said bag radially expands to directly contact the walls of said canal and deflate said bag so as to cause dilatation of the cervix and simulate effects of labor contraction, a portion of the wall of said bag intermediate the ends thereof being adapted to be more resistant to radial expansion thereby to form on inflation of said bag a constricted waist portion which accommodates the edges of the cervix.
The bag which is suitable made of a relatively heavy gauge plastic material such as polyvinyl chloride suitably has embedded in the waist portion a relatively inextensible fiber such as cotton fiber which provides the necessary resistance to expansion of the waist portion which waist portion is suitably equidistant from the ends of the bag and thus on inflation of the bag the waist portion is constricted to accommodate the edges of the cervix.
As with the cervical dilator of my Canadian application No. 958,955 the ends of the bag are adapted to restrict axial expansion of the bag during inflation and desirably the ends of the bag allow substantially no axial expansion of the bag on inflation thereof.
Inflation and deflation of the bag may suitably be effected by periodically discharging fluid under pressure from a pressure means into said bag through the inlet means, the pressure means being suitably a hydraulic pressure means, the fluid being suitably water. Thus the present invention also provides in combination with the aforesaid cervical dilator of the present invention means for periodically discharging fluid under pressure into said bag through said inlet means to effect inflation or deflation thereof.
The present invention will be further illustrated by way of the accompanying drawings in which FIG. 1 is a perspective view of a deflated cervical dilator according to a preferred embodiment of the present invention, and
FIG. 2 is a similar view of the cervical dilator of FIG. 1 in the inflated state.
Referring to the accompanying drawings, the cervical dilator comprises a bag 1 formed from a flexible plastic material such as polyvinyl chloride sealed along the top and bottom edges thereof so that there is no appreciable axial expansion of the bag on inflation thereof and having an inlet 2 for the periodic introduction of water under pressure into the bag 1 to effect radial inflation and deflation thereof. The bag I has a waist portion 3 which has a continuous thread 4 embedded therein which restricts radial expansion of the waist portion 3 on inflation of the bag 1 (see HO. 2) thus providing accommodation for the edges of the cervix during expansion of the bag 1 and as such avoiding the tendency of the bag I to move axially with respect to the cervix during inflation thereof.
I claim:
1. A cervical dilator comprising a flattenable, closed end, tubular fluidtight bag formed from a flexible plastic material and insertable in a collapsed state into the cervical canal, inlet and outlet means in said bag for allowing intermittent introduction of fluid under pressure to alternately inflate said bag such that the peripheral tubular sidewall of said bag radially expands to directly contact the walls of said canal and deflate said bag so as to cause dilatation of the cervix and simulate effects of labor contraction, a portion of the peripheral wall of said bag intermediate the ends thereof including relatively inextensible reinforcing means which extend circumferentially of the peripheral wall in radially restraining engagement therewith so as to cause said portion of said peripheral wall to be more resistant to radial expansion than the remainder of said peripheral wall whereby to form on inflation of said bag a constricted waist portion having substantially the same girth when said bag is inflated as when said bag is in said collapsed state and which locates and retains the edges of the cervix when said bag is inflated, the ends of said bag defining substantially the extremities of said dilator and being reinforced by being folded transversely and sealed to limit axial expansion of said bag during inflation.
2. The cervical dilator of claim 1 wherein the bag peripheral wall is formed from polyvinyl chloride and relatively inextensible reinforcing means is a continuous textile thread imbedded in said portion of the peripheral wall.
i i l l

Claims (2)

1. A cervical dilator comprising a flattenable, closed end, tubular fluidtight bag formed from a flexible plastic material and insertable in a collapsed state into the cervical canal, inlet and outlet means in said bag for allowing intermittent introduction of fluid under pressure to alternately inflate said bag such that the peripheral tubular sidewall of said bag radially expands to directly contact the walls of said canal and deflate said bag so as to cause dilatation of the cervix and simulate effects of labor contraction, a portion of the peripheral wall of said bag intermediate the ends thereof including relatively inextensible reinforcing means which extend circumferentially of the peripheral wall in radially restraining engagement therewith so as to cause said portion of said peripheral wall to be more resistant to radial expansion than the remainder of said peripheral wall whereby to form on inflation of said bag a constricted waist portion having substantially the same girth when said bag is inflated as when said bag is in said collapsed state and which locates and retains the edges of the cervix when said bag is inflated, the ends of said bag defining substantially the extremities of said dilator and being reinforced by being folded transversely and sealed to limit axial expansion of said bag during inflation.
2. The cervical dilator of claim 1 wherein the bag peripheral wall is formed from polyvinyl chloride and the relatively inextensible reinforcing means is a continuous textile thread imbedded in said portion of the peripheral wall.
US793369*A 1969-01-23 1969-01-23 Cervical dilator Expired - Lifetime US3626949A (en)

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Cited By (47)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3863639A (en) * 1974-04-04 1975-02-04 Richard N Kleaveland Disposable visceral retainer
US3900033A (en) * 1973-03-07 1975-08-19 Ortho Pharma Corp Dilator for cervical canal
US4018230A (en) * 1974-04-04 1977-04-19 Kazuo Ochiai Cervical dilator
US4083369A (en) * 1976-07-02 1978-04-11 Manfred Sinnreich Surgical instruments
DE2813215A1 (en) * 1978-03-25 1979-09-27 Rolf Thomas Medical or dental body cavity examination device - is transparent plastics foil tube, folded to permit inflation by pump
US4602623A (en) * 1983-12-30 1986-07-29 Michael Cherkassky Method of delivering a fetus
US4984585A (en) * 1983-02-17 1991-01-15 Austad Eric D Tissue expander
US5309896A (en) * 1991-05-29 1994-05-10 Origin Medsystems, Inc. Retraction methods using endoscopic inflatable retraction devices
US5402772A (en) * 1991-05-29 1995-04-04 Origin Medsystems, Inc. Endoscopic expandable retraction device
US5431173A (en) * 1991-05-29 1995-07-11 Origin Medsystems, Inc. Method and apparatus for body structure manipulation and dissection
US5450843A (en) * 1991-05-29 1995-09-19 Origin Medsystems, Inc. Retraction apparatus and methods for endoscopic surgery
US5501653A (en) * 1991-05-29 1996-03-26 Origin Medsystems, Inc. Abdominal wall lifting retractor with hinged cross-member
US5527264A (en) * 1991-05-29 1996-06-18 Origin Medsystem, Inc. Methods of using endoscopic inflatable retraction devices
US5562603A (en) * 1991-05-29 1996-10-08 Origin Medsystems, Inc. Endoscopic inflatable retraction device with fluid-tight elastomeric window
US5704372A (en) * 1991-05-29 1998-01-06 Origin Medsystems, Inc. Endoscopic inflatable retraction devices for separating layers of tissue, and methods of using
US5716327A (en) * 1991-05-29 1998-02-10 Origin Medsystems, Inc. Body wall retraction system for wide cavity retraction
US5722986A (en) * 1991-05-29 1998-03-03 Origin Medsystems, Inc. Inflatable devices for separating layers of tissue, and methods of using
US5728119A (en) * 1991-05-29 1998-03-17 Origin Medsystems, Inc. Method and inflatable chamber apparatus for separating layers of tissue
US5779728A (en) * 1991-05-29 1998-07-14 Origin Medsystems, Inc. Method and inflatable chamber apparatus for separating layers of tissue
US5803901A (en) * 1991-05-29 1998-09-08 Origin Medsystems, Inc. Inflatable devices for separating layers of tissue and methods of using
WO1998046298A1 (en) * 1997-04-15 1998-10-22 Wilhelm Horkel Delivery preparation and facilitation device and preparatory gymnastics
US5865728A (en) * 1991-05-29 1999-02-02 Origin Medsystems, Inc. Method of using an endoscopic inflatable lifting apparatus to create an anatomic working space
US6277136B1 (en) 1990-03-02 2001-08-21 General Surgical Innovations, Inc. Method for developing an anatomic space
US20010041896A1 (en) * 1994-01-26 2001-11-15 Kyphon Inc. Sterile kit for holding a single use, expandable structure intended for deployment in bone
US6358266B1 (en) * 1990-03-02 2002-03-19 General Surgical Innovations, Inc. Active cannulas
US6361543B1 (en) 1991-05-29 2002-03-26 Sherwood Services Ag Inflatable devices for separating layers of tissue, and methods of using
US6423083B2 (en) 1994-01-26 2002-07-23 Kyphon Inc. Inflatable device for use in surgical protocol relating to fixation of bone
US20030233096A1 (en) * 1997-06-09 2003-12-18 Kyphon Inc. Methods and devices for treating bone after high velocity and/or trauma fracture
US20040015175A1 (en) * 2002-07-17 2004-01-22 Nguyen Bich Van Tube of air bag - design on glove, forceps and vacuum use to open the birth canal - labor delivery
US6899719B2 (en) 1994-01-26 2005-05-31 Kyphon Inc. Systems and methods for treating fractured or diseased bone using expandable bodies
US20070156067A1 (en) * 2005-12-29 2007-07-05 Dharmesh Dubey Cervimeter
US20070239197A1 (en) * 2006-04-10 2007-10-11 Intrapartum Ventures, Llc Method for cervical dilation and/or measurement
US20070255185A1 (en) * 2005-12-29 2007-11-01 Intrapartum Ventures, Llc. Cervical dilation measurement apparatus
US20080058857A1 (en) * 1994-01-26 2008-03-06 Kyphon, Inc. Systems and methods treating a vertebral body
US20100010530A1 (en) * 2006-07-14 2010-01-14 Ams Research Corporation Balloon Dilation for Implantable Prosthesis
US7695487B2 (en) 1999-10-08 2010-04-13 General Surgical Innovations, Inc. Balloon dissection apparatus
US7744617B2 (en) 1991-05-29 2010-06-29 Covidien Ag Method and inflatable chamber apparatus for separating layers of tissue
US7879038B2 (en) 1998-04-06 2011-02-01 Kyphon Sarl Apparatus, kits, and methods for creating cavities in cancellous bone using an elongated loop structure or bristles
US7967835B2 (en) 2003-05-05 2011-06-28 Tyco Healthcare Group Lp Apparatus for use in fascial cleft surgery for opening an anatomic space
US8747439B2 (en) 2000-03-13 2014-06-10 P Tech, Llc Method of using ultrasonic vibration to secure body tissue with fastening element
US8808329B2 (en) 1998-02-06 2014-08-19 Bonutti Skeletal Innovations Llc Apparatus and method for securing a portion of a body
US8814902B2 (en) 2000-05-03 2014-08-26 Bonutti Skeletal Innovations Llc Method of securing body tissue
US8845687B2 (en) 1996-08-19 2014-09-30 Bonutti Skeletal Innovations Llc Anchor for securing a suture
US8845699B2 (en) 1999-08-09 2014-09-30 Bonutti Skeletal Innovations Llc Method of securing tissue
US9492197B2 (en) 2009-10-13 2016-11-15 Materna Medical, Inc. Methods and apparatus for preventing vaginal lacerations during childbirth
US9770238B2 (en) 2001-12-03 2017-09-26 P Tech, Llc Magnetic positioning apparatus
US10828476B2 (en) 2015-07-10 2020-11-10 Materna Medical, Inc. Systems and methods for the treatment and prevention of female pelvic dysfunction

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Cited By (103)

* 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
US3900033A (en) * 1973-03-07 1975-08-19 Ortho Pharma Corp Dilator for cervical canal
US3863639A (en) * 1974-04-04 1975-02-04 Richard N Kleaveland Disposable visceral retainer
US4018230A (en) * 1974-04-04 1977-04-19 Kazuo Ochiai Cervical dilator
US4083369A (en) * 1976-07-02 1978-04-11 Manfred Sinnreich Surgical instruments
DE2813215A1 (en) * 1978-03-25 1979-09-27 Rolf Thomas Medical or dental body cavity examination device - is transparent plastics foil tube, folded to permit inflation by pump
US4984585A (en) * 1983-02-17 1991-01-15 Austad Eric D Tissue expander
US4602623A (en) * 1983-12-30 1986-07-29 Michael Cherkassky Method of delivering a fetus
US6277136B1 (en) 1990-03-02 2001-08-21 General Surgical Innovations, Inc. Method for developing an anatomic space
US6358266B1 (en) * 1990-03-02 2002-03-19 General Surgical Innovations, Inc. Active cannulas
US7311719B2 (en) 1990-03-02 2007-12-25 General Surgical Innovations, Inc. Active cannulas
US5634883A (en) * 1991-05-29 1997-06-03 Origin Medsystems, Inc. Apparatus for peritoneal retraction
US5738629A (en) * 1991-05-29 1998-04-14 Origin Medsystems, Inc. Self-retracting endoscope
US5454367A (en) * 1991-05-29 1995-10-03 Origin Medsystems, Inc. Method of using endoscopic inflatable retraction device with fluid tight elastomeric window
US5465711A (en) * 1991-05-29 1995-11-14 Origin Medsystems, Inc. Surgical procedures using endoscopic inflatable retraction devices
US5501653A (en) * 1991-05-29 1996-03-26 Origin Medsystems, Inc. Abdominal wall lifting retractor with hinged cross-member
US5520609A (en) * 1991-05-29 1996-05-28 Origin Medsystems, Inc. Apparatus and method for peritoneal retraction
US5522790A (en) * 1991-05-29 1996-06-04 Origin Medsystems, Inc. Retraction apparatus and methods for endoscopic surgery
US5527264A (en) * 1991-05-29 1996-06-18 Origin Medsystem, Inc. Methods of using endoscopic inflatable retraction devices
US5531856A (en) * 1991-05-29 1996-07-02 Origin Medsystems, Inc. Endoscopic inflatable retraction devices
US5562603A (en) * 1991-05-29 1996-10-08 Origin Medsystems, Inc. Endoscopic inflatable retraction device with fluid-tight elastomeric window
US5575759A (en) * 1991-05-29 1996-11-19 Origin Medsystems, Inc. Methods of using inflatable retraction devices in laparoscopic surgery
US20040097792A1 (en) * 1991-05-29 2004-05-20 Moll Frederic H. Endoscopic inflatable retraction device, method of using, and method of making
US5643178A (en) * 1991-05-29 1997-07-01 Origin Medsystems, Inc. Method for peritoneal retration
US5704372A (en) * 1991-05-29 1998-01-06 Origin Medsystems, Inc. Endoscopic inflatable retraction devices for separating layers of tissue, and methods of using
US5716327A (en) * 1991-05-29 1998-02-10 Origin Medsystems, Inc. Body wall retraction system for wide cavity retraction
US5722986A (en) * 1991-05-29 1998-03-03 Origin Medsystems, Inc. Inflatable devices for separating layers of tissue, and methods of using
US5728119A (en) * 1991-05-29 1998-03-17 Origin Medsystems, Inc. Method and inflatable chamber apparatus for separating layers of tissue
US5450843A (en) * 1991-05-29 1995-09-19 Origin Medsystems, Inc. Retraction apparatus and methods for endoscopic surgery
US5743850A (en) * 1991-05-29 1998-04-28 Origin Medsystems, Inc. Endoscopic inflatable retraction device with additional inflatable chamber
US5743851A (en) * 1991-05-29 1998-04-28 Origin Medsystems, Inc. Retraction apparatus and methods for endoscopic surgery
US5779728A (en) * 1991-05-29 1998-07-14 Origin Medsystems, Inc. Method and inflatable chamber apparatus for separating layers of tissue
US5803901A (en) * 1991-05-29 1998-09-08 Origin Medsystems, Inc. Inflatable devices for separating layers of tissue and methods of using
US5823945A (en) * 1991-05-29 1998-10-20 Origin Medsystems, Inc. Endoscopic inflatable retraction device with additional inflatable chamber
US5865728A (en) * 1991-05-29 1999-02-02 Origin Medsystems, Inc. Method of using an endoscopic inflatable lifting apparatus to create an anatomic working space
US5925058A (en) * 1991-05-29 1999-07-20 Origin Medsystems, Inc. Method and inflatable chamber apparatus for separating layers of tissue
US7766823B2 (en) 1991-05-29 2010-08-03 Covidien Ag Endoscopic inflatable retraction device, method of using, and method of making
US20100174149A1 (en) * 1991-05-29 2010-07-08 Covidien Ag Endoscopic inflatable retraction device, method of using, and method of making
US7744617B2 (en) 1991-05-29 2010-06-29 Covidien Ag Method and inflatable chamber apparatus for separating layers of tissue
US5431173A (en) * 1991-05-29 1995-07-11 Origin Medsystems, Inc. Method and apparatus for body structure manipulation and dissection
US5425357A (en) * 1991-05-29 1995-06-20 Origin Medsystems, Inc. Inflatable retraction devices for use in laparoscopic surgery
US5402772A (en) * 1991-05-29 1995-04-04 Origin Medsystems, Inc. Endoscopic expandable retraction device
US6361543B1 (en) 1991-05-29 2002-03-26 Sherwood Services Ag Inflatable devices for separating layers of tissue, and methods of using
US5309896A (en) * 1991-05-29 1994-05-10 Origin Medsystems, Inc. Retraction methods using endoscopic inflatable retraction devices
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