US4547187A — Inflatable cholangiocath and method for cholangio…

Claim 1

Independent Claim 181 words

An inflatable cholangiocath for use in roentgenography comprising: elongate shaft means having a proximal and a distal end and a body wall; second shaft means of substantially equal diameter to said elongate shaft means and carried at said distal end thereof having a body wall and left and right branches adapted to be inserted into an incised duct of a patient; a central drainage lumen extending from said proximal end, through said elongate shaft, and out said left and right branches; balloon means encompassing a portion of said distal end and said left and right branches, said balloon means being closed to said central drainage lumen; and means for selectively inflating and deflating said balloon means within the duct for predetermined periods of time; wherein said balloon means is generally spherical when inflated; is inflatable to a diameter of at least three times the diameter of said elongate shaft and second shaft means; conforms to the diameter of said elongate shaft and second shaft means when deflated and can be removed from the common bile duct and the patient without surgery.

Claim 2

Dependent Claim 181 words

An inflatable cholangiocath for use in roentgenography comprising: elongate shaft means having a proximal and a distal end and a body wall; second shaft means of substantially equal diameter to said elongate shaft means and carried at said distal end thereof having a body wall and left and right branches adapted to be inserted into an incised duct of a patient; a central drainage lumen extending from said proximal end, through said elongate shaft, and out said left and right branches; balloon means encompassing a portion of said distal end and said left and right branches, said balloon means being closed to said central drainage lumen; and means for selectively inflating and deflating said balloon means within the duct for predetermined periods of time; wherein said balloon means is generally spherical when inflated; is inflatable to a diameter of at least three times the diameter of said elongate shaft and second shaft means; conforms to the diameter of said elongate shaft and second shaft means when deflated and can be removed from the common bile duct and the patient without surgery.

Claim 3

Dependent Claim 77 words

An inflatable cholangiocath, as set forth in claim 1, wherein said means for selectively inflating and deflating comprises: valve means for the injection and removal of air or other fluids with respect to said balloon means; second lumen means extending from said valve means through said elongate shaft adjacent to and separate from said drainage lumen and open to said balloon means; and first chamber means carried by said elongate shaft means and carrying said valve means.

Claim 4

Dependent Claim 46 words

An inflatable cholangiocath, as set forth in claim 2, said means for selectively inflating and deflating further having second chamber means carried by said elongate shaft means, contiguous with said first chamber means and providing a communication between said valve means and said second lumen means.

Claim 5

Dependent Claim 85 words

An inflatable cholangiocath, as set forth in claim 3, further having: web means interposed between a portion of said first chamber means and said elongate shaft means thereby angularly disposing said valve means from the longitudinal axis of said elongate shaft; said valve means having an oblique exterior face forming an obtuse angle with said elongate shaft means; and the remaining portion of said first chamber means and all of said second chamber means being integrally molded into said body wall of said elongate shaft.

Claim 6

Dependent Claim 29 words

An inflatable cholangiocath, as set forth in claim 4, wherein said proximal end extends below said valve means to receive an injection from an instrument providing a contrast medium.

Claim 7

Dependent Claim 35 words

An inflatable cholangiocath, as set forth in claim 1, wherein said second shaft means is shorter than said elongate shaft means and said left and right branches are generally perpendicular to said elongate shaft means.

Claim 8

Dependent Claim 22 words

An inflatable cholangiocath, as set forth in claim 1, wherein said elongate shaft and second shaft means are of substantially equal diameter.

Claim 9

Dependent Claim 182 words

An improved method of cholangiography including the steps of: surgically incising the common bile duct of an anesthetized patient; inserting an inflatable hollow tube means into said incised bile duct; injecting a radiopaque contrast agent into said bile duct through a hollow shaft means communicating with said hollow tube means; subjecting said injected bile duct to roentgenography whereby any stones therein can be detected; deflating said hollow tube means, removing said hollow tube means from said bile duct and removing any such stones as may be detected; repeating said steps of inserting, inflating, injecting, subjecting and deflating until said bile duct is free from stones; and removing said inflatable tube means from said bile duct and the patient after all of the stones have been removed; the improvement comprising: inflating a portion of said tube means, after said step of inserting, so as to seal said incision with respect to the flow of liquid therefrom, said seal being created at the site of said incision, whereby suturing said hollow tube means into said bile duct before said step of injecting is obviated.

Claim 10

Dependent Claim 182 words

An improved method of cholangiography including the steps of: surgically incising the common bile duct of an anesthetized patient; inserting an inflatable hollow tube means into said incised bile duct; injecting a radiopaque contrast agent into said bile duct through a hollow shaft means communicating with said hollow tube means; subjecting said injected bile duct to roentgenography whereby any stones therein can be detected; deflating said hollow tube means, removing said hollow tube means from said bile duct and removing any such stones as may be detected; repeating said steps of inserting, inflating, injecting, subjecting and deflating until said bile duct is free from stones; and removing said inflatable tube means from said bile duct and the patient after all of the stones have been removed; the improvement comprising: inflating a portion of said tube means, after said step of inserting, so as to seal said incision with respect to the flow of liquid therefrom, said seal being created at the site of said incision, whereby suturing said hollow tube means into said bile duct before said step of injecting is obviated.

Claim 11

Dependent Claim 44 words

An improved method, as set forth in claim 8, including the further step of: securing said inflatable tube means within said bile duct between said last step of deflating and said step of removing to provide a drain out of the patient following surgery.

Claim 12

Dependent Claim 69 words

An improved method, as set forth in claim 8, wherein said inflatable hollow tube means comprises: left and right branches carried at one end of said hollow shaft, a central drainage lumen being common to said hollow shaft and said inflatable hollow tube means; and balloon means emcompassing a portion of said hollow shaft and said left and right branches, said balloon means being closed to said central lumen.

Claim 13

Dependent Claim 88 words

An improved method, as set forth in claim 10, wherein said hollow shaft is provided with means for selectively inflating and deflating said balloon means and said means comprises: valve means for the injection and removal of air or other fluids with respect to said balloon means; second lumen means extending from said valve means through said hollow shaft adjacent to and separate from said central lumen and open to said balloon means; and first chamber means carried by said hollow shaft means and carrying said valve means.

Claim 14

Dependent Claim 45 words

An improved method, as set forth in claim 11, said means for selectively inflating and deflating further having second chamber means carried by said hollow shaft, contiguous with said first chamber means and providing a communication between said valve means and said second lumen means.

Claim 15

Dependent Claim 32 words

An improved method, as set forth in claim 12, wherein a portion of said hollow shaft extends below said valve means to receive an injection from an instrument providing a contrast medium.

Claim 16

Dependent Claim 34 words

An improved method, as set forth in claim 10, wherein said inflatable hollow tube means is shorter than said hollow shaft and said left and right branches are generally perpendicular to said hollow shaft.

Claim 17

Dependent Claim 23 words

An improved method, as set forth in claim 10, wherein said inflatable hollow tube means and hollow shaft are of substantially equal diameter.

Claim 18

Dependent Claim 40 words

An improved method, as set forth in claim 15, wherein said balloon means is generally spherical when inflated and is inflatable to a diameter of at least three times the diameter of said inflatable hollow tube means and hollow shaft.

Claim 19

Dependent Claim 42 words

An improved method, as set forth in claim 10, wherein said balloon means conforms to the diameter of said hollow shaft and inflatable hollow tube means when deflated and can be removed from the common bile duct and the patient without surgery.

Claim 20

Dependent Claim 162 words

In combination with a hypodermic syringe having a tip for the injection of air or other fluids, an inflatable cholangiocath for use in roentgenography comprising: elongate shaft means having a proximal and a distal end and a body wall; second shaft means carried at said distal end having a body wall and left and right branches adapted to be inserted into an incised duct of a patient; a central drainage lumen extending from said proximal end, through an elongate shaft, and out said left and right branches; balloon means encompassing a portion of said distal end and said left and right branches, said balloon means being closed to said central drainage lumen; and means for selectively inflating and deflating said balloon means within the duct for predetermined periods of time; wherein said balloon means conforms to the diameter of said elongate shaft and second shaft means when deflated and can be removed from the common bile duct and the patient without surgery.

Claim 21

Dependent Claim 162 words

In combination with a hypodermic syringe having a tip for the injection of air or other fluids, an inflatable cholangiocath for use in roentgenography comprising: elongate shaft means having a proximal and a distal end and a body wall; second shaft means carried at said distal end having a body wall and left and right branches adapted to be inserted into an incised duct of a patient; a central drainage lumen extending from said proximal end, through an elongate shaft, and out said left and right branches; balloon means encompassing a portion of said distal end and said left and right branches, said balloon means being closed to said central drainage lumen; and means for selectively inflating and deflating said balloon means within the duct for predetermined periods of time; wherein said balloon means conforms to the diameter of said elongate shaft and second shaft means when deflated and can be removed from the common bile duct and the patient without surgery.

Claim 22

Dependent Claim 82 words

In combination with a hypodermic syringe, an inflatable cholangiocath as defined in claim 18, wherein said means for selectively inflating and deflating comprises: valve means for the injection and removal of air or other fluids with respect to said balloon means; second lumen means extending from said valve means through said elongate shaft adjacent to and separate from said drainage lumen and open to said balloon means; and first chamber means carried by said elongate shaft means and carrying said valve means.

Claim 23

Dependent Claim 51 words

In combination with a hypodermic syringe, an inflatable cholangiocath as defined in claim 19, said means for selectively inflating and deflating further having second chamber means carried by said elongate shaft means, contiguous with said first chamber means and providing a communication between said valve means and said second lumen means.

Claim 24

Dependent Claim 90 words

In combination with a hypodermic syringe, an inflatable cholangiocath as defined in claim 20, further having: web means interposed between a portion of said first chamber means and said elongate shaft means thereby angularly disposing said valve means from the longitudinal axis of said elongate shaft; said valve means having an oblique exterior face forming an obtuse angle with said elongate shaft means; and the remaining portion of said first chamber means and all of said second chamber means being integrally molded into said body wall of said elongate shaft.

Claim 25

Dependent Claim 34 words

In combination with a hypodermic syringe, an inflatable cholangiocath as defined in claim 21, wherein said proximal end extends below said valve means to receive an injection from an instrument providing a contrast medium.

Claim 26

Dependent Claim 27 words

In combination with a hypodermic syringe, an inflatable cholangiocath as defined in claim 20, wherein said syringe and inflatable cholangiocath are provided in a sterile disposable package.

Claim 27

Dependent Claim 36 words

In combination with a hypodermic syringe, an inflatable cholangiocath as defined in claim 23, wherein said package further carries a hollow needle engageable with said syringe tip and with said means for selectively inflating and deflating.

Claim 28

Dependent Claim 39 words

In combination with a hypodermic syringe, an inflatable cholangiocath as defined in claim 24, wherein the length of said needle is sufficient to pass through said valve and said first chamber means and extends into said second chamber means.

Claim 29

Dependent Claim 40 words

In combination with a hypodermic syringe, an inflatable cholangiocath as defined in claim 18, wherein said second shaft means is shorter than said elongate shaft means and said left and right branches are generally perpendicular to said elongate shaft means.

Claim 30

Dependent Claim 27 words

In combination with a hypodermic syringe, an inflatable cholangiocath as defined in claim 18, wherein said elongate shaft and second shaft means are of substantially equal diameter.

Claim 31

Dependent Claim 44 words

In combination with a hypodermic syringe, an inflatable cholangiocath as defined in claim 27, wherein said balloon means is generally spherical when inflated and is inflatable to a diameter of at least three times the diameter of said elongate shaft and second shaft means.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1988-10-14	1989-04-15	1989-10-15	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1992-10-14	1993-04-15	1993-10-15	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1996-10-14	1997-04-15	1997-10-15	$7700.00	Window Closed / Lapsed

Inflatable cholangiocath and method for cholangiography therewith

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