US 11,439,800 B2Granted

Sheath stepwise dilation

AssigneeEvolutionmedventures LLC

InventorsSameer Gafoor, Ahmed Elmouelhi

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Abstract

A sheath assembly includes a first sheath, a second sheath, and an attachment mechanism. The first sheath includes a first sheath inner surface defining a first sheath lumen extending along a first sheath central longitudinal axis between a first sheath first end portion and a first sheath second end portion. The second sheath includes a second sheath inner surface defining a second sheath lumen extending along a second sheath longitudinal axis between a second sheath first end portion and a second sheath second end portion. The attachment mechanism couples the second sheath to the first sheath. The attachment mechanism includes an attachment mechanism step-up dilation. At least a portion of the attachment mechanism is asymmetrical, at the attachment mechanism step-up dilation, about the first sheath central longitudinal axis.

Claims19

Dependent claims

A sheath assembly comprising:

a first sheath including a first sheath first end portion, a first sheath second end portion opposite the first sheath first end portion, a first sheath inner surface, and a first sheath outer surface opposite the first sheath inner surface, the first sheath inner surface defining a first sheath lumen extending along a first sheath central longitudinal axis between the first sheath first end portion and the first sheath second end portion;
a second sheath including a second sheath first end portion, a second sheath second end portion opposite the second sheath first end portion, a second sheath inner surface, and a second sheath outer surface opposite the second sheath inner surface, the second sheath inner surface defining a second sheath lumen extending along a second sheath longitudinal axis between the second sheath first end portion and the second sheath second end portion;
and
an attachment mechanism coupling the second sheath to the first sheath, wherein the attachment mechanism includes an attachment mechanism step-up dilation, and wherein at least a portion of the attachment mechanism is asymmetrical, at the attachment mechanism step-up dilation, about the first sheath central longitudinal axis,
wherein the attachment mechanism step-up dilation includes a first attachment mechanism step-up dilation at a first attachment mechanism portion and a second attachment mechanism step-up dilation at a second attachment mechanism portion, and wherein the second attachment mechanism step-up dilation is different than the first attachment mechanism step-up dilation.

2 more elements

A method of using a sheath assembly, the method comprising the steps of:

securing a second sheath to a first sheath via an attachment mechanism such that a first portion of a second sheath outer surface interfaces with a first sheath outer surface, wherein the first sheath defines a first sheath central longitudinal axis, wherein the attachment mechanism includes an attachment mechanism step-up dilation, wherein at least a portion of the attachment mechanism is asymmetrical, at the attachment mechanism step-up dilation, about the first sheath central longitudinal axis, wherein the attachment mechanism step-up dilation includes a first attachment mechanism step-up dilation at a first attachment mechanism portion and a second attachment mechanism step-up dilation at a second attachment mechanism portion, and wherein the second attachment mechanism step-up dilation is different than the first attachment mechanism step-up dilation;
inserting a guidewire to a region of interest within a patient;
placing the first sheath over the guidewire and inserting the first sheath and the second sheath into the patient through a single access site at the patient;
contacting the single access site with the attachment mechanism step-up dilation and then with the second sheath;
transitioning the second sheath from an expanded state to a collapsed state upon inserting the second sheath into the patient, the second sheath collapsing to the collapsed state in a direction toward the first sheath;
and
inserting an instrument through the second sheath and causing the second sheath to transition from the collapsed state to the expanded state.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/524,260Filed 11 Nov 2021 · us provisional application
Priority: 15 Nov 2020
Published: US 2022/0152367 A119 May 2022
Granted: 13 Sep 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

A61M 29/00
Dilators with or without means for introducing media
A61M 25/0662
Body-piercing guide needles or the like: guide tubes
A61M 25/09
Introducing, guiding, advancing, emplacing or holding catheters: guide wires
A61M 2025/0006
Having two or more concentrically arranged tubes for forming a concentric catheter system: which can be secured against axial movement, e.g. by…

Family

Application63/113,921Us provisional application · filed 15 Nov 2020
US 2022/0152367 A1Pre-grant publication · published 19 May 2022
US 11,439,800 B2This patent

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

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