US3882852A - Surgical dilators having insufflating means - Google Patents

Surgical dilators having insufflating means Download PDF

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US3882852A
US3882852A US43266674A US3882852A US 3882852 A US3882852 A US 3882852A US 43266674 A US43266674 A US 43266674A US 3882852 A US3882852 A US 3882852A
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element
expandable
structure
accordance
expandable element
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Manfred Sinnreich
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Manfred Sinnreich
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M29/00Dilators with or without means for introducing media, e.g. remedies
    • A61M29/02Dilators made of swellable material
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M25/00Catheters; Hollow probes
    • A61M25/10Balloon catheters
    • A61M2025/1043Balloon catheters with special features or adapted for special applications
    • A61M2025/1093Balloon catheters with special features or adapted for special applications having particular tip characteristics

Abstract

Surgical instrments for obstretical use including a first device for dilating the cervical neck, and a second defice for dilating the uterus. Each device includes a relatively rigid element surrounded by a pneumatically inflatable element, the rigid element projecting through the inflatable element to permit complete dilation and the performance of surgical procedures through a longitudinally extending bore in the rigid element. The invention may be incorporated into known endoscope constructions, and permits the controlled expansion of the cavity being expanded to the degree required. One embodiment of the invention is suitable for use in creating a pneumoperitoneum, and offers added safety by confining the inflating gas to the interior of the inflatable element.

Description

United States tent 1191 Sinnreich 14 1 May 13,1975

1 1 SURGICAL DILATORS HAVING INSUFFLATING MEANS [22] Filed: Jan. 11,1974

[21] Appl. No.: 432,666

[52] US. Cl. 128/4; 128/344; 128/242; 128/246 [51] Int. Cl. A61m 3/00; A61m 29/00 [58] Field of Search 128/4, 344, 5, 6, 7, 8, 128/242, 245, 246

[56] References Cited UNITED STATES PATENTS 1,621,159 3/1927 Evans 128/6 2,548,602 4/1951 Greenburg... 128/4 2,621,651 12/1952 Wallace 128/4 3,044,461 7/1962 Murdock 1 128/4 3,154,077 10/1964 Cannon 1 128/344 X 3,448,739 6/1969 Stark et a1. 128/344 X 3,709,214 l/l973 Robertson 128/4 Primary Examiner-Channing L. Face [57] ABSTRACT Surgical instrments for obstretical use including a first device for dilating the cervical neck, and a second defice for dilating the uterus. Each device includes a relatively rigid element surrounded by a pneumatically inflatable element, the rigid element projecting through the inflatable element to permit complete dilation and the performance of surgical procedures through a longitudinally extending bore in the rigid element. The invention may be incorporated into known endoscope constructions, and permits the controlled expansion of the cavity being expanded to the degree required. One embodiment of the invention is suitable for use in creating a pneumoperitoneum, and offers added safety by confining the inflating gas to the interior of the inflatable element.

5 Claims, 6 Drawing Figures PATENTED HAY I 3i9?5 SHEET 10F 3 FIG] FIG.2

PATENTED MAY 1 18s 8', 882.852

SHEET 2 BF 3 PATEmEuim-v I ma SHEET 3 BF 3 FIG.6

BACKGROUND OF THE INVENTION This invention relates to surgical instruments, and more particularly to those for use in obstretical procedures.

The examination of the cervix and uterus, as well as the performance of surgical procedures in these areas has been greatly facilitated by the development of the endoscope, which permits not only the examination under illuminated conditions within these organs, but the performance of biopsy and cauterizing procedures as well. As a part of the obtaining of access to the uterus, it is normal to dilate the cervix by the serial insertion and withdrawal of a plurality of obturators, normally ranging in diameter from approximately 3mm. to 12mm. Once dilated, the cervix will remain in such condition sufficiently long to permit the introduction of the endoscope past the cervix and into the uterus. Dilation of the uterus is presently accomplished by the introduction of an inert gas past a seal effected at the cervical neck.

When the surgical procedure is accomplished by penetrating the abdomen, it is also known to inflate the abdominal cavity, again, employing an inert gas, this procedure being employed to gain access to the fallopian tubes to effect sterilization by electro-cauterization.

Unfortunately,the introduction of a relatively inert gas under pressure into body cavities is not without substantial danger. In some cases, injury has resulted from excess dialation as a result of excess gaseous pressure. More serious has been the formation of embolisms and resulting complications.

Another form of know surgical inflating device is the Foley catheter useful for draining the bladder, where the ducts have become blocked. This device is formed substantially of non-rigid material, and its use as a dialator is correspondingly limited.

BRIEF DESCRIPTION OF THE PRESENT INVENTION Briefly stated, the invention contemplates the provision of a set of instruments in which dilation is accomplished by the inflation of an expandable element, after insertion of the same into the body cavity, so that the inflating gas is confined within the element. The inflating element may be formed so as to permit inflation only to a predetermined degree, or expansion may be controlled solely by inflation pressure within the elastic limit of the element. The element is formed to surround a rigid shaft extending to the opposite ends of the inflatable element, so that the expansive pressure is maintained substantially uniform along the longitudinal axis of the shaft. Where the shaft is hollow, an endoscope may be positioned within a longitudinally extending bore, whereby biopsy, cauterization, and simple examination can be performed at the distal end of the cavity. When the inflatable element is employed in the uterus, it may be frustoconically shaped, with the base thereof at the distal end, to permit maximum exposure of the walls of the uterus, and the exposed ends of the fallopian tubes.

BRIEF DESCRIPTION OF THE DRAWINGS In the drawings, to which reference will be made in the specification, similar reference characters have been employed to designate corresponding parts throughout the. several views.

FIG. 1 is a perspective view of a first embodiment of the invention.

FIG. 2 is an enlarged fragmentary sectional view of the first embodiment showing the same in expanded condition.

FIG. 3 is a perspective view of a second embodiment of the invention.

FIG. 4 is a perspective view of a third embodiment of the invention, partly in section.

FIG. 5 is a view in elevation, partly in section showing a fourth embodiment of the invention.

FIG. 6 is an exploded view in elevation of the fourth embodiment.

DETAILED DESCRIPTION OF THE DISCLOSED EMBODIMENTS Referring to FIGS. 1 and 2 in the drawings, the first embodiment, generally indicated by reference character 10, comprises broadly: a rigid shaft member 11 approximately 3mm. in diameter and bounded between first and second ends 12 and 13, respectively, by an outer surface 14. A proximal portion 15 forms a handle.

Surrounding a distal portion adjacent the first end 12 is an expandable membrane formed of rubber or synthetic resinous materials such as polyurethane. The membrane is of elongated configuration, and is bonded at first and second marginal edges 17 and 18 to the surface 14, as best seen in FIG. 2. Communicating with the interior of the membrane is a supply tube 19 having a pressure guage 20, a bleeder valve 21 and inflating means 22, which may be in the form of a manually engageable bulb. It will be understood that the inflating means 22 may be substituted by a source of pressurized gas (not shown) having suitable valving means.

The first embodiment is used for dilating the cervix, and in unflated condition has a diameter approximating 3mm. It is inserted in normal manner into the cervical neck, following which the membrane 16 is inflated under pressure to exert a substantial force against the inner surface of the cervix sufficient to dilate it to approximately l2mm. The amount of internal pressure required to accomplish this will vary from patient to patient, and a suitable range of inflation pressures is established empirically. The dilation of the cervix is preferably accomplished gradually, so as not to impart any undue stresses to the patient, and normally dilation can be accomplished by gradually building pressure up to 15 to 20 lbs. per square inch. Once dilation has been obtained to a range of about 12mm. to l4mm., the bleeder valve 21 may be opened, and the device 10 easily withdrawn.

The second embodiment, generally indicated by reference character 30, is employed after the cervix has reached a dilated condition, and is projected into the uterus prior to expansion. It includes a hollow tube 31 having an outer diameter of approximately l2mm., the tube having a continuous longitudinally extending bore communicating with proximal and distal ends 33 and 34, respectively. The outer surface 35 is provided with finger engaging means 36 to permit convenient insertion and withdrawal.

The expandable member 37 is preferably a molded type, including an inner cylindrical wall 38, a planar end wall 39 and a conical wall 40 joining the end wall 39 in a curvilinear edge 41. Sealed areas 42 and 43 interconnect the member 37 with the outer surface 35 of the tube 31. An inflating tube 44 includes a pressure guage 45 communicating with inflating means 46. Because of the larger volume of the member 37, inflation is preferably done from a source of compressed inert gas rather than a hand operated bulb.

When inflated, the frustoconical shape of the member 37 exposes a wide area of the uterine wall to examination and surgical procedure performed by the insertion of an endoscope through the bore 32, and relative movement of the barrel of the endoscope permits examination and the performance of surgical procedures at the distal end of the tube 31.

FIG. 4 illustrates a third embodiment of the invention, generally indicated by reference character 50 which incorporates a conventional endoscope 51 secured in fixed relation therewith. The inflating means 52 is similar to that of the second embodiment, and may be secured to the outer surface 53 of the barrel. Where the interconnection is permanent, a degree of flexibility is lost in that the distal end of the endoscope cannot be shifted relative to the distal end of the tube, but this disadvantage may be offset by convenience in insertion during certain surgical procedures.

Turning now to the fourth embodiment of the invention, as illustrated in FIGS. and 6 in the drawings, this structure is useful where access through the cervix is not desirable. The fourth embodiment, generally indicated by reference character 60, includes a tubular member 61 having a hollow bore 62 extending between first and second ends 63 and 64, respectively. Hand engaging means 65 is mounted on the outer surface of the tubular member, as in the second embodiment.

I. See Medical World News, Sept. 21, 1973 pp. 41 et seq.

The expandable membrane 66 is of generally spherical configuration, and includes a supply tube 67, gauge 68, bleeder valve 69 and an inflation source 70. Selectively penetrating the bore 62 is a stylet 71 which permits the puncturing of the abdomen for insertion of the tubular member 61, and an obturator 72 having a rounded distal end which permits the spreading of the cavity prior to inflation. Once insuflation has been accomplished, the obturator is removed to be replaced by an endoscope.

Use of the fourth embodiment forms a pneumoperitoneum, as known in the art, but the inflating gas is confined within the expandable membrane 66, and not permitted to contact tissue.

It may thus be seen that l have invented novel and highly useful improvements in surgical instruments affording the insuflation of body cavities with a facility that has heretofore been impossible. In the case of dilation of the cervix, the entire dilation can be accomplished using a single instrument, which employes pneumatic pressure rather than the insertion of a series of dilators. Examination of the uterus, and the performance of surgical procedures therein is accomplised in a somewhat similar manner, the inflating gases being confined within an inflatable member, and not permitted to contact tissue being treated. In the case of the fourth embodiment, the treatment may be accomplished by penetrating the abdomen, and inflating the abdominal cavity, again with complete insulation of the inflating gas from the tissue of the patient.

I wish it to be understood that I do not consider the invention limited to the precise details of structure shown and set forth in this specification, for obvious modifications will occur to those skilled in the art to which the invention pertains.

I claim:

1. A combination surgical dilating and endoscopic device comprising: a rigid shaft element having proximal and distal ends bordering an outer surface, an expandable element surrounding said shaft element and secured to said outer surface, means supplying an inflating medium to said expandable element communicating therewith, and means for determining the degree of inflation of said inflatable element, said shaft element penetrating said inflatable element and defining a longitudinal bore extending substantailly the length thereof; and an endoscopic element having an elongated barrel within the bore of said rigid shaft element and capable of longitudinal movement relative thereto; whereby said device may be inserted into a body opening to a position in which said inflatable element is positioned within a body cavity, following which said expandable element is expanded to correspondingly expand said body cavity, and said endoscope is manipulated relative to said rigid shaft element to perform a required surgical function.

2. Structure in accordance with claim 1 in which said expandable element is of generally cylindrical configuration.

3. Structure in accordance with claim 1 in which said expandable element is of frusto-conical configuration with the wider portion thereof located at the distal end of said rigid shaft element.

4. Structure in accordance with claim 1 in which said expandable element is of spherical configuration.

5. Structure in accordance with claim 1, in which said means for determining the degree of inflation of said expandable element includes a pressure gauge.

Claims (5)

1. A combination surgical dilating and endoscopic device comprising: a rigid shaft element having proximal and distal ends bordering an outer surface, an expandable element surrounding said shaft element and secured to said outer surface, means supplying an inflating medium to said expandable element communicating therewith, and means for determining the degree of inflation of said inflatable element, said shaft element penetrating said inflatable element and defining a longitudinal bore extending substantailly the length thereof; and an endoscopic element having an elongated Barrel within the bore of said rigid shaft element and capable of longitudinal movement relative thereto; whereby said device may be inserted into a body opening to a position in which said inflatable element is positioned within a body cavity, following which said expandable element is expanded to correspondingly expand said body cavity, and said endoscope is manipulated relative to said rigid shaft element to perform a required surgical function.
2. Structure in accordance with claim 1 in which said expandable element is of generally cylindrical configuration.
3. Structure in accordance with claim 1 in which said expandable element is of frusto-conical configuration with the wider portion thereof located at the distal end of said rigid shaft element.
4. Structure in accordance with claim 1 in which said expandable element is of spherical configuration.
5. Structure in accordance with claim 1, in which said means for determining the degree of inflation of said expandable element includes a pressure gauge.
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