US4782834A — Dual lumen dilatation catheter and method of manu…

Claim 1

Independent Claim 219 words

A dilatation catheter for use in transluminal angioplasty having a longitudinally extending tubular member, said tubular member comprising: (a) a first tubular section formed of polymeric material having first and second longitudinally extending lumens positioned side by side with openings for each lumen at the distal end of said section; (b) a second tubular section formed of polymeric material having a longitudinally extending lumen joined to the distal end of the first tubular section with the first longitudinally extending lumen in the first tubular section in fluid communication with the longitudinally extending lumen in the second tubular section, the polymeric material of said second tubular section having a different flexibility from the polymeric material of the first tubular section to provide variable flexibility along the length of the tubular member of the catheter; and (c) an inflatable balloon mounted on the distal extremity of the tubular member and disposed concentrically about the second tubular section with the second tubular section extending along substantially the entire length of balloon, the proximal end of the balloon joined to the distal end of the first tubular section and the distal end of the balloon joined to the second tubular section and with the second longitudinally extending lumen in the first tubular section in fluid communication with the interior of the inflatable balloon.

Claim 2

Dependent Claim 219 words

A dilatation catheter for use in transluminal angioplasty having a longitudinally extending tubular member, said tubular member comprising: (a) a first tubular section formed of polymeric material having first and second longitudinally extending lumens positioned side by side with openings for each lumen at the distal end of said section; (b) a second tubular section formed of polymeric material having a longitudinally extending lumen joined to the distal end of the first tubular section with the first longitudinally extending lumen in the first tubular section in fluid communication with the longitudinally extending lumen in the second tubular section, the polymeric material of said second tubular section having a different flexibility from the polymeric material of the first tubular section to provide variable flexibility along the length of the tubular member of the catheter; and (c) an inflatable balloon mounted on the distal extremity of the tubular member and disposed concentrically about the second tubular section with the second tubular section extending along substantially the entire length of balloon, the proximal end of the balloon joined to the distal end of the first tubular section and the distal end of the balloon joined to the second tubular section and with the second longitudinally extending lumen in the first tubular section in fluid communication with the interior of the inflatable balloon.

Claim 3

Dependent Claim 47 words

The dilatation catheter of claim 1 wherein a third tubular section is joined on the proximal end thereof to the distal end of the second tubular member and is formed of polymeric material more flexible than the polymeric material from which the second tubular member is made.

Claim 4

Dependent Claim 52 words

The catheter of claim 2 wherein the tubular sections are fabricated of polyethylene tubing of differing flexibilities, the junction between the second and third tubular sections are heat melted together, and the distal end of the balloon is joined by heat sealing to the third tubular section over the entire length thereof.

Claim 5

Dependent Claim 20 words

The catheter of claim 3 wherein the first and second tubular sections have a junction therebetween formed by heat melting.

Claim 6

Dependent Claim 55 words

The catheter of claim 2 wherein the tubular sections are fabricated of polyester tubing of differing flexibilities, the junction between the second and third tubular sections are heat melted together, and the distal end of the balloon is bonded adhesively to the third tubular section in a relatively narrow band near the proximal end thereof.

Claim 7

Dependent Claim 20 words

The catheter of claim 1 wherein the first and second tubular sections are fabricated of polyethylene tubing having differing flexibilities.

Claim 8

Dependent Claim 20 words

The catheter of claim 1 wherein the first and second tubular sections are fabricated of polyester tubing having differing flexibilities.

Claim 9

Dependent Claim 41 words

The catheter of claim 1 wherein the proximal end of the balloon is joined to the tubular member directly over the junctions between the first and second tubular sections to provide smooth transitions in flexibility along the length of the catheter.

Claim 10

Dependent Claim 204 words

In a dilatation catheter for use in transluminal angioplasty: a first shaft section fabricated of a relatively flexible material having first and second longitudinally extending luminal openings positioned side by side, a second shaft section fabricated of a material stiffer than the first shaft section having a single luminal opening heat melted to the distal end of the first shaft section with the first luminal opening extending through the junction and opening through the side wall of the second shaft section and the second luminal opening communicating with the single luminal opening in the second shaft section, a third shaft section fabricated of a material more flexible than the second shaft section having a single luminal opening heat melted to the distal end of the second shaft section with the luminal openings of the second and third shaft sections communicating with each other, and a distensible tubular balloon disposed about the second shaft section and closed at its proximal and distal ends by sealing to the shaft sections over the melted junctions between the shaft sections with the interior of the balloon communicating with the first luminal opening in the first shaft section through the opening in the wall of the second shaft section.

Claim 11

Dependent Claim 204 words

In a dilatation catheter for use in transluminal angioplasty: a first shaft section fabricated of a relatively flexible material having first and second longitudinally extending luminal openings positioned side by side, a second shaft section fabricated of a material stiffer than the first shaft section having a single luminal opening heat melted to the distal end of the first shaft section with the first luminal opening extending through the junction and opening through the side wall of the second shaft section and the second luminal opening communicating with the single luminal opening in the second shaft section, a third shaft section fabricated of a material more flexible than the second shaft section having a single luminal opening heat melted to the distal end of the second shaft section with the luminal openings of the second and third shaft sections communicating with each other, and a distensible tubular balloon disposed about the second shaft section and closed at its proximal and distal ends by sealing to the shaft sections over the melted junctions between the shaft sections with the interior of the balloon communicating with the first luminal opening in the first shaft section through the opening in the wall of the second shaft section.

Claim 12

Dependent Claim 26 words

The catheter of claim 9 wherein the heat melted junction between the second and third shaft sections extends the entire length of the third shaft section.

Claim 13

Dependent Claim 38 words

The catheter of claim 10 wherein the shaft sections are fabricated of polyethylene tubing, and the distal end portion of the balloon is heat sealed to the shaft sections over the entire length of the third shaft section.

Claim 14

Dependent Claim 43 words

The catheter of claim 10 wherein the shaft sections are fabricated of polyester tubing, and the distal end portion of the balloon is adhesively bonded to the shaft sections in a relatively narrow band near the proximal end of the third shaft section.

Claim 15

Dependent Claim 194 words

In a method of manufacturing a dilatation catheter for use in transluminal angioplasty, the steps of: providing a first shaft section of relatively flexible material with first and second longitudinally extending luminal openings positioned side by side therein, joining a second shaft section of relatively stiff material with a single luminal opening to the distal end of the first shaft section with the first luminal opening extending through the junction and opening through the side wall of the second shaft section and the second luminal opening communicating with the single luminal opening in the second shaft section, joining a third shaft section of relatively flexible material with a single luminal opening to the distal end of the second shaft section with the luminal openings of the second and third shaft sections communicating with each other, positioning a distensible tubular member over the second shaft section, and bonding the end portions of the tubular member to the shaft sections over the junctions between the shaft sections to form an inflatable balloon which communicates with the first luminal opening in the first shaft section through the opening in the side wall of the second shaft section.

Claim 16

Dependent Claim 194 words

In a method of manufacturing a dilatation catheter for use in transluminal angioplasty, the steps of: providing a first shaft section of relatively flexible material with first and second longitudinally extending luminal openings positioned side by side therein, joining a second shaft section of relatively stiff material with a single luminal opening to the distal end of the first shaft section with the first luminal opening extending through the junction and opening through the side wall of the second shaft section and the second luminal opening communicating with the single luminal opening in the second shaft section, joining a third shaft section of relatively flexible material with a single luminal opening to the distal end of the second shaft section with the luminal openings of the second and third shaft sections communicating with each other, positioning a distensible tubular member over the second shaft section, and bonding the end portions of the tubular member to the shaft sections over the junctions between the shaft sections to form an inflatable balloon which communicates with the first luminal opening in the first shaft section through the opening in the side wall of the second shaft section.

Claim 17

Dependent Claim 15 words

The method of claim 13 wherein the shaft sections are joined together by heat melting.

Claim 18

Dependent Claim 25 words

The method of claim 14 wherein the proximal and distal end portions of the tubular member are bonded to the shaft sections by heat sealing.

Claim 19

Dependent Claim 39 words

The method of claim 14 wherein the proximal end portion of the tubular member is bonded to the shaft sections by heat bonding, and the distal end portion of the tubular member is adhesively bonded to the shaft sections.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1991-11-08	1992-05-09	1992-11-08	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1995-11-08	1996-05-09	1996-11-08	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1999-11-08	2000-05-09	2000-11-08	$7700.00	Window Closed / Lapsed

Dual lumen dilatation catheter and method of manufacturing the same

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