US 9,427,557 B2Granted

Occlusion crossing device and method

AssigneeBoston Scientific Scimed, Inc.

InventorsMichael Meyer, Michael Wayne Davis

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Abstract

A stent delivery catheter for positioning a stent across a lesion of a blood vessel is disclosed. The catheter includes an inflation balloon coupled to a distal region of the elongate shaft of the catheter and a stent loaded on the inflation balloon. The catheter may also include an occlusion balloon having a proximal waist secured to the elongate shaft and a distal waist secured to the elongate shaft. The occlusion balloon includes a first folded-over portion extending distal of the distal waist to a distalmost extent of the occlusion balloon and a second folded-over portion extending proximal of the proximal waist to a proximalmost extent of the occlusion balloon. The catheter further includes a fluid discharge port located distal of the occlusion balloon for discharging a lubricious fluid exterior of the elongate shaft toward the stent to facilitate advancing the stent across an occlusion.

Claims18

Dependent claims

A stent delivery catheter for positioning a stent across a lesion of a blood vessel, the stent delivery catheter comprising:

an elongate shaft having a proximal end, a proximal region proximate the proximal end, a distal end, and a distal region proximate the distal end;
an inflation balloon including a proximal waist, a distal waist and a central region between the proximal waist and the distal waist, the inflation balloon secured to the distal region of the elongate shaft;
a stent having a proximal end, a distal end and a length from the proximal end to the distal end, the stent disposed around the central region of the inflation balloon;
and
an occlusion balloon secured to the elongate shaft proximal of the inflation balloon, the occlusion balloon having a proximal waist secured to the elongate shaft and a distal waist secured to the elongate shaft, the occlusion balloon including a first folded-over portion extending distal of the distal waist to a distalmost extent of the occlusion balloon and a second folded-over portion extending proximal of the proximal waist to a proximalmost extent of the occlusion balloon, the occlusion balloon being inflatable from a pre-inflated state to an inflated state;
wherein when the occlusion balloon is in the pre-inflated state the first folded-over portion has a length measured from the distal waist of the occlusion balloon to the distalmost extent of the occlusion balloon and the second folded-over portion has a length measured from the proximal waist of the occlusion balloon to the proximalmost extent of the occlusion balloon, wherein the length measured from the distal waist of the occlusion balloon to the distalmost extent of the occlusion balloon is greater than the length measured from the proximal waist of the occlusion balloon to the proximalmost extent of the occlusion balloon;
wherein the sum of the lengths of the first folded-over portion and the second folded-over portion is greater than the length of the stent;
wherein the occlusion balloon is configured to roll onto itself in the inflated state as the inflation balloon and stent are advanced across the lesion;
and
wherein the distalmost extent of the occlusion balloon is proximal of the stent in the pre-inflated state.

7 more elements

A stent delivery catheter for positioning a stent across a lesion of a blood vessel, the stent delivery catheter comprising:

an elongate shaft having a proximal end, a proximal region proximate the proximal end, a distal end, and a distal region proximate the distal end;
a stent having a proximal end, a distal end and a length from the proximal end to the distal end, the stent mounted on the distal region of the elongate shaft;
an occlusion balloon secured to the elongate shaft proximal of the proximal end of the stent, the occlusion balloon having a proximal waist secured to the elongate shaft and a distal waist secured to the elongate shaft, the occlusion balloon including a first folded-over portion extending distal of the distal waist to a distalmost extent of the occlusion balloon and a second folded-over portion extending proximal of the proximal waist to a proximalmost extent of the occlusion balloon, the occlusion balloon being inflatable from a pre-inflated state to an inflated state;
and
a fluid discharge port concentrically disposed about the elongate shaft;
wherein when the occlusion balloon is in the pre-inflated state the first folded-over portion has a length measured from the distal waist of the occlusion balloon to the distalmost extent of the occlusion balloon and the second folded-over portion has a length measured from the proximal waist of the occlusion balloon to the proximalmost extent of the occlusion balloon, wherein the length measured from the distal waist of the occlusion balloon to the distalmost extent of the occlusion balloon is greater than the length measured from the proximal waist of the occlusion balloon to the proximalmost extent of the occlusion balloon;
wherein the sum of the lengths of the first folded-over portion and the second folded-over portion is greater than the length of the stent;
wherein the distalmost extent of the occlusion balloon is proximal of the stent in the pre-inflated state;
and
wherein the occlusion balloon is configured to roll onto itself in the inflated state as the stent is advanced across the lesion.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/352,739Filed 18 Jan 2012 · continuation
Priority: 23 Jul 2008
Published: US 2012/0116491 A110 May 2012
Granted: 30 Aug 2016
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

A61M 25/1002
Balloon catheters: characterised by balloon shape
A61B 17/12136
Characterised by the type of occluding device: balloons
A61B 17/12172
Having a mesh structure: having a pre-set deployed three-dimensional shape
A61F 2/958
Instruments specially adapted for placement or removal of stents or stent-grafts: inflatable balloons for placing stents or stent-grafts

Family

Application12/178,425Parent of this continuation · filed 23 Jul 2008
US 2012/0116491 A1Pre-grant publication · published 10 May 2012
US 8,109,985 B2Parent of this continuation
US 2010/0023106 A1Published application
US 9,427,557 B2This patent

From the US filing history. Foreign family members aren’t listed.