EP0213748A1 — Dual dilatation catheter assembly and miniature b…

Claim 1

Independent Claim 195 words

A dual dilatation catheter assembly for dilating a stenosis in a vessel comprising a first dilatation catheter, a first tubular element having a lumen extending therethrough, a second tubular element extending coaxially over the first tubular element and forming a lumen extending between the first and second tubular elements, a balloon carried by the second tubular element and having its interior in communication with the lumen extending between the first and second tubular elements, a second dilatation catheter extending through the lumen in the first tubular element of the first dilatation catheter, a flexible elongate tubular element having a lumen extending therethrough, an inflatable balloon carried by the flexible tubular element of the second dilatation catheter and having its interior in communication with the lumen of the flexible tubular element of the second dilatation catheter, the balloon of the second dilatation catheter being elongate and for dilating a stenosis, the balloon of the second dilatation catheter having a collapsed diameter which is less than the interior diameter of the lumen of the first tubular element of the first dilatation catheter whereby the second dilatation catheter can be inserted and removed from the first dilatation catheter.

Claim 2

Dependent Claim 195 words

A dual dilatation catheter assembly for dilating a stenosis in a vessel comprising a first dilatation catheter, a first tubular element having a lumen extending therethrough, a second tubular element extending coaxially over the first tubular element and forming a lumen extending between the first and second tubular elements, a balloon carried by the second tubular element and having its interior in communication with the lumen extending between the first and second tubular elements, a second dilatation catheter extending through the lumen in the first tubular element of the first dilatation catheter, a flexible elongate tubular element having a lumen extending therethrough, an inflatable balloon carried by the flexible tubular element of the second dilatation catheter and having its interior in communication with the lumen of the flexible tubular element of the second dilatation catheter, the balloon of the second dilatation catheter being elongate and for dilating a stenosis, the balloon of the second dilatation catheter having a collapsed diameter which is less than the interior diameter of the lumen of the first tubular element of the first dilatation catheter whereby the second dilatation catheter can be inserted and removed from the first dilatation catheter.

Claim 3

Dependent Claim 201 words

A dual dilatation catheter assembly comprising a first dilatation catheter, a first tubular element having a lumen extending therethrough, a second tubular element extending coaxially over the first tubular element and forming a lumen extending between the first and second tubular elements, a balloon carried by the second tubular element and having its interior in communication with the lumen extending between the first and second tubular elements, a second dilatation catheter extending through the lumen in the first tubular element of the first dilatation catheter, a flexible elongate tubular element having a lumen extending therethrough, an inflatable balloon carried by the flexible tubular element of the second dilatation catheter, the balloon of the second dilatation catheter having a collapsed diameter which is less than the interior diameter of the lumen of the first tubular element of the first dilatation catheter whereby the second dilatation catheter can be inserted and removed from the first dilatation catheter, the second dilatation catheter having a flexible tip and a guide wire extending through the lumen in the flexible elongate tubular element of the second dilatation catheter and being secured to the tip whereby the guide wire can be rotated to cause rotation of the tip.

Claim 4

Dependent Claim 201 words

A dual dilatation catheter assembly comprising a first dilatation catheter, a first tubular element having a lumen extending therethrough, a second tubular element extending coaxially over the first tubular element and forming a lumen extending between the first and second tubular elements, a balloon carried by the second tubular element and having its interior in communication with the lumen extending between the first and second tubular elements, a second dilatation catheter extending through the lumen in the first tubular element of the first dilatation catheter, a flexible elongate tubular element having a lumen extending therethrough, an inflatable balloon carried by the flexible tubular element of the second dilatation catheter, the balloon of the second dilatation catheter having a collapsed diameter which is less than the interior diameter of the lumen of the first tubular element of the first dilatation catheter whereby the second dilatation catheter can be inserted and removed from the first dilatation catheter, the second dilatation catheter having a flexible tip and a guide wire extending through the lumen in the flexible elongate tubular element of the second dilatation catheter and being secured to the tip whereby the guide wire can be rotated to cause rotation of the tip.

Claim 5

Dependent Claim 44 words

An assembly as claimed in claim 1 wherein said flexible elongate tubular element of the second dilatation catheter includes a flexible metal tube and a plastic tube secured tothe metal tube, the balloon of the second dilatation catheter being carried by the plastic tube.

Claim 6

Dependent Claim 232 words

A dual dilatation catheter assembly comprising a first dilatation catheter, a first tubular element having a lumen extending therethrough, a second tubular element extending coaxially over the first tubular element and forming a lumen extending between the first and second tubular elements, a balloon carried by the second tubular element and having its interior in communication with the lumen extending between the first and second tubular elements, a second dilatation catheter extending through the lumen in the first tubular element of the first dilatation catheter, a flexible elongate tubular element having a lumen extending therethrough, an inflatable balloon carried by the flexible tubular element of the second dilatation catheter, the balloon of the second dilatation catheter having a collapsed diameter which is less than the interior diameter of the lumen of the first tubular element of the first dilatation catheter whereby the second dilatation catheter can be inserted and removed from the first dilatation catheter, the second dilatation catheter having said flexible elongate tubular element of the second dilatation catheter includes a flexible metal tube and a plastic tube secured to the metal tube, the balloon of the second dilatation catheter being carried by the plastic tube, said second dilatation catheter also including a flexible tip bonded to the distal extremity of the balloon together with a guide wire secured to the flexible tip for causing limited rotation of the flexible tip.

Claim 7

Dependent Claim 232 words

A dual dilatation catheter assembly comprising a first dilatation catheter, a first tubular element having a lumen extending therethrough, a second tubular element extending coaxially over the first tubular element and forming a lumen extending between the first and second tubular elements, a balloon carried by the second tubular element and having its interior in communication with the lumen extending between the first and second tubular elements, a second dilatation catheter extending through the lumen in the first tubular element of the first dilatation catheter, a flexible elongate tubular element having a lumen extending therethrough, an inflatable balloon carried by the flexible tubular element of the second dilatation catheter, the balloon of the second dilatation catheter having a collapsed diameter which is less than the interior diameter of the lumen of the first tubular element of the first dilatation catheter whereby the second dilatation catheter can be inserted and removed from the first dilatation catheter, the second dilatation catheter having said flexible elongate tubular element of the second dilatation catheter includes a flexible metal tube and a plastic tube secured to the metal tube, the balloon of the second dilatation catheter being carried by the plastic tube, said second dilatation catheter also including a flexible tip bonded to the distal extremity of the balloon together with a guide wire secured to the flexible tip for causing limited rotation of the flexible tip.

Claim 8

Dependent Claim 94 words

A miniature balloon dilatation catheter assembly for dilating a stenosis in a vessel comprising a flexible elongate tubular element having a lumen extending therethrough, a balloon carried by the flexible elongate tubular element and being in communication with the lumen extending through the tubular element, and means for inflating the balloon with a limited predetermined quantity of carbon dioxide, optionally further comprising a flexible tip secured to the distal extremity of the balloon and a guide wire secured to the tip and extending through the balloon and the lumen of the flexible elongate element.

Claim 9

Dependent Claim 94 words

A miniature balloon dilatation catheter assembly for dilating a stenosis in a vessel comprising a flexible elongate tubular element having a lumen extending therethrough, a balloon carried by the flexible elongate tubular element and being in communication with the lumen extending through the tubular element, and means for inflating the balloon with a limited predetermined quantity of carbon dioxide, optionally further comprising a flexible tip secured to the distal extremity of the balloon and a guide wire secured to the tip and extending through the balloon and the lumen of the flexible elongate element.

Claim 10

Dependent Claim 37 words

A dilatation catheter as in claim 5 wherein the flexible elongate element is formed of a section of a metal tube and a section of plastic and wherein the balloon is formed integral with the plastic section.

Claim 11

Dependent Claim 40 words

An assembly as claimed in claim 2 which further comprises a means for introducing a radiographic contrast liquid into the balloon of the first dilatation catheter and means for introducing a gas into the balloon of the second dilatation catheter.

Claim 12

Dependent Claim 30 words

An assembly as claimed in any one of claims 2, 5 or 6 which further comprises means connected to the guide wire for providing limited rotation of the guide wire.

Claim 13

Dependent Claim 47 words

An assembly as claimed in claim 8 wherein said means for providing limited rotation of the guide wire includes means for causing rotation of the guide wire independently of the rotation of the proximal extremity of the first tubular element of the second or miniature dilatation catheter.

Claim 14

Dependent Claim 39 words

An assembly as claimed in claim 8 wherein said means for providing limited rotation of the guide wire includes means for causing rotation of the guide wire and the first tubular element of the second or miniature dilatation catheter.

Claim 15

Dependent Claim 92 words

An assembly as claimed in claim 5 or claim 6 wherein said means for introducing gas, for example carbon dioxide, into the balloon of the scecond dilatation catheter or miniature catheter includes a cylinder, a piston slidably mounted in the cylinder, and means carried by the piston and the cylinder for preventing introduction of more than a limited predetermined quantity of gas, optionally including a one-way valve means venting to the environment more than a limited predetermined quantity of carbon dioxide to be introduced into the balloon of the second dilatation catheter.

Claim 16

Dependent Claim 89 words

An assembly as claimed in claim 11 wherein the one-way valve means is carried by the cylinder and is spaced from the distal extemity of the cylinder so that a predetermined volume of the cylinder corresponding to the predetermined volume of gas extends beyond the one-way valve, whereby when the cylinder is filled with gas and the piston is advanced, the gas in the cylinder which is in excess of that of the predetermined volume proximal of the one-way valve is vented to the atmosphere through the one-way valve.

Claim 17

Dependent Claim 75 words

An assembly as claimed in claim 12 which further comprises a housing carrying the cylinder, a plunger extending into the h ousing and being secured to the piston in the cylinder, an inlet fitting connected to the cylinder at a proximal extremity of the cylinder, the piston being movable in the cylinder so that it clears the inlet fitting and the distal extremity of the cylinder so that the cylinder can be filled with gas.

Claim 18

Dependent Claim 39 words

An assembly as claimed in claim 13 which further comprises means carried by the piston rod for preventing retraction of the piston in the cylinder beyond the inlet fitting until the piston rod is rotated through a predetermined angle.

Claim 19

Dependent Claim 100 words

An assembly as claimed in claim 14 wherein said means for preventing movement of the piston beyond the inlet fitting unless the piston rod is rotated through a predetermined angle includes cooperative pin and slot means carried by the piston rod and the housing, the pin and slot means including a slot which has first, second and third portions with the first portion extending longitudinally of the piston rod, the second portion extending at a substantial angle with respect to the longitudinal axis of the piston rod and the third portion extending in a direction longitudinally of the piston rod.

Dual dilatation catheter assembly and miniature balloon dilatation catheter for use therewith

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