Integrated expandable access for medical device introducer

Patent metadata

Field	Value
Publication number	US-12496095-B2
Application number	US-202318368762-A
Country	US
Kind code	B2
Filing date	Sep 15, 2023
Priority date	Sep 14, 2017
Publication date	Dec 16, 2025
Grant date	Dec 16, 2025

Abstract

An integrated sheath assembly for inserting a medical device such as a percutaneous pump into a vessel can include a first sheath having a first lumen defining a first opening between proximal and distal ends of the first sheath for passage of a portion of the pump and a second sheath having a second lumen defining a second opening between proximal and distal ends of the second sheath. The second lumen is expandable to allow passage of the first sheath containing the portion of the pump. The first sheath fills a space between the second sheath and the portion of the percutaneous pump when the first sheath containing the percutaneous pump is inserted into the second lumen. The first sheath has a first hub, and the second sheath has a second hub. In some embodiments, a single sheath and a movable connector can be integrated on the medical device.

First claim

The invention claimed is:

1 . A sheath assembly comprising:
a medical device configured to be inserted into a blood vessel, a first portion of the medical device having a first width, and a second portion of the medical device having a second width that is smaller than the first width, the second portion of the medical device being proximal of the first portion of the medical device; a first sheath having a first lumen extending between proximal and distal ends of the first sheath configured to allow for passage of the second portion of the medical device, wherein the first sheath is tapered from the proximal end of the first sheath to the distal end of the first sheath; a first hub coupled to the proximal end of the first sheath; an expandable second sheath dimensioned for insertion into a femoral artery through an arteriotomy and having a second lumen extending between proximal and distal ends of the expandable second sheath, the second lumen being configured to have a first inner diameter at rest, and to be elastically expandable from the first inner diameter to a second inner diameter; and a second hub coupled to the proximal end of the expandable second sheath, wherein the second lumen is configured to expand to the second inner diameter during passage of the first portion of the medical device, and to elastically contract from the second inner diameter during the passage of the second portion of the medical device, wherein the first sheath forms a seal between an inner surface of the expandable second sheath and the second portion of the medical device when the expandable second sheath is inserted in the blood vessel through the arteriotomy and the first sheath is inserted into the second lumen over the second portion of the medical device, wherein the first sheath is advanced into the expandable second sheath such that blood from the blood vessel is substantially prevented from migrating past the seal, and wherein an outer diameter of the expandable second sheath is dimensioned to be introduced through a percutaneous access site of about 20 Fr (6.67 mm) or less.

2 . A sheath assembly comprising:
a medical device configured to be inserted into a blood vessel, a first portion of the medical device having a first width, and a second portion of the medical device having a second width that is smaller than the first width, the second portion of the medical device being proximal of the first portion of the medical device; a first sheath having a first lumen extending between proximal and distal ends of the first sheath configured to allow for passage of the second portion of the medical device, wherein the first sheath is tapered from the proximal end of the first sheath to the distal end of the first sheath; a first hub coupled to the proximal end of the first sheath; an expandable second sheath dimensioned for insertion into a femoral artery through an arteriotomy and having a second lumen extending between proximal and distal ends of the expandable second sheath, the second lumen being configured to have a first inner diameter at rest, and to be elastically expandable from the first inner diameter to a second inner diameter; and a second hub coupled to the proximal end of the expandable second sheath, wherein the second lumen is configured to expand to the second inner diameter during passage of the first portion of the medical device, and to elastically contract from the second inner diameter during the passage of the second portion of the medical device, wherein the first sheath forms a seal between an inner surface of the expandable second sheath and the second portion of the medical device when the expandable second sheath is inserted in the blood vessel through the arteriotomy and the first sheath is inserted into the second lumen over the second portion of the medical device, wherein the first sheath is advanced into the expandable second sheath such that blood from the blood vessel is substantially prevented from migrating past the seal; and wherein the expandable second sheath comprises either a porous material or a mesh material.

3 . A sheath assembly comprising:
a medical device configured to be inserted into a blood vessel, a first portion of the medical device having a first width, and a second portion of the medical device having a second width that is smaller than the first width, the second portion of the medical device being proximal of the first portion of the medical device; a first sheath having a first lumen extending between proximal and distal ends of the first sheath configured to allow for passage of the second portion of the medical device, wherein the first sheath is tapered from the proximal end of the first sheath to the distal end of the first sheath; a first hub coupled to the proximal end of the first sheath; an expandable second sheath dimensioned for insertion into a femoral artery through an arteriotomy and having a second lumen extending between proximal and distal ends of the expandable second sheath, the second lumen being configured to have a first inner diameter at rest, and to be elastically expandable from the first inner diameter to a second inner diameter; and a second hub coupled to the proximal end of the expandable second sheath, wherein the second lumen is configured to expand to the second inner diameter during passage of the first portion of the medical device, and to elastically contract from the second inner diameter during the passage of the second portion of the medical device, wherein the first sheath forms a seal between an inner surface of the expandable second sheath and the second portion of the medical device when the expandable second sheath is inserted in the blood vessel through the arteriotomy and the first sheath is inserted into the second lumen over the second portion of the medical device, wherein the first sheath is advanced into the expandable second sheath such that blood from the blood vessel is substantially prevented from migrating past the seal, and wherein the first sheath is configured to be inserted into the expandable second sheath by moving the first sheath and the expandable second sheath axially relative to one another along a longitudinal axis of the first sheath and the expandable second sheath.

4 . The sheath assembly of claim 3 , further comprising a port configured to enable delivery of a fluid between an inner surface of the first sheath and an outer surface of the second portion of the medical device when the second portion of the medical device is contained within the first lumen.

5 . The sheath assembly of claim 4 , wherein the port is located on the first hub.

6 . The sheath assembly of claim 3 , further comprising a port configured to enable delivery of a fluid between the inner surface of the expandable second sheath and an outer surface of the first sheath when the first sheath is inserted into the second lumen.

7 . The sheath assembly of claim 6 , wherein the port is located on the second hub.

8 . The sheath assembly of claim 3 , wherein the first hub further comprises a port configured to enable delivery of a fluid into the second lumen of the expandable second sheath when the first sheath is inserted into the second lumen.

9 . The sheath assembly of claim 3 , wherein the first sheath further comprises an auxiliary lumen substantially parallel to the first lumen and extending from the proximal end of the first sheath to the distal end of the first sheath, the auxiliary lumen configured to allow for passage of a guidewire.

10 . The sheath assembly of claim 3 , wherein the first sheath further comprises an expandable balloon configured to enable varying of a diameter of the second lume

Assignees

• Abiomed Inc

Inventors

• Fantuzzi Glen R
• Siess Thorsten

Classifications

• A61B17/3415 Primary

  for introducing tubes or catheters, e.g. gastrostomy tubes, drain catheters (A61B17/3417 takes precedence; body piercing catheter guide needles A61M25/06) · CPC title

• A61M2025/0004

  having two or more concentrically arranged tubes for forming a concentric catheter system · CPC title

• A61B17/3431

  being collapsible, e.g. made of thin flexible material (A61B17/3423 takes precedence) · CPC title

• A61M25/0668

  splittable, tear apart · CPC title

• A61B2017/348

  Means for supporting the trocar against the body or retaining the trocar inside the body · CPC title