IP Library › Granted Patent US 12,635,998
Granted Patent B2
US 12,635,998 · App. 17/899,213 · Granted May 26, 2026

Tissue retractor having operative corridor formed by dilator and blades

Inventor: Loic Josse (Palm Beach Gardens, FL)
Assignee: WARSAW ORTHOPEDIC, INC.
A61B17/0206A61B17/0218A61M29/00A61B2017/00039A61M2230/08
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Quick Facts
Patent No.
US 12,635,998
App. No.
17/899,213
Granted
May 26, 2026
Kind
B2
Abstract

A system for forming an operative corridor with a dilator, a first blade, and a second blade is disclosed. The dilator may include a hollow body having an interior surface and an exterior neuromonitoring surface and the interior surface may define an interior passageway and the exterior surface may defined a first working surface and a first attachment surface. The first working surface may be configured to contact patient skin and the attachment surface may be configured to directly couple to the first blade and the second blade. The operative corridor of the system may be defined by the first working surface of the dilator, the second working surface of the first blade, and the third working surface of the second blade. Additionally, the system may be configured for use with a tissue retractor and the dilator, first blade, and second blade may be simultaneously insert within patient tissue.

Claims (44)

1 . A dilator, comprising:

a hollow elongate body extending in a longitudinal direction from a proximal end to a distal end, the elongate body having an interior surface and an exterior surface;

the interior surface defining a closed interior passageway having a central axis extending in the longitudinal direction; and

the exterior surface being defined by a first working surface and an attachment surface, wherein, in a cross-section view, the entirety of the first working surface is configured to contact patient tissue and the attachment surface is configured to directly couple to at least one blade of a retractor having a second working surface configured to contact patient tissue,

wherein, in a cross-section view, the working surface of the dilator and the working surface of the at least one blade together define an outer perimeter of a closed operative corridor configured to directly contact patient tissue,

wherein, in the cross-section view, the entirety of the outer perimeter is configured to directly contact patient tissue, and

wherein, in the cross-section view, an angular extent of the first working surface is about 150-180 degrees around the central axis.

2 . The dilator of claim 1 , wherein the first working surface includes a neuromonitoring surface.

3 . The dilator of claim 2 , wherein the attachment surface comprises at least one rail portion that is inset from an edge of the first working surface.

4 . The dilator of claim 2 , wherein the attachment surface comprises a plurality of rail portions that are each inset from an edge of the first working surface.

5 . The dilator of claim 1 , wherein the first working surface comprises a smooth curvilinear surface extending in the longitudinal direction.

6 . The dilator of claim 1 , wherein, in a cross-section view, the interior passage is cylindrical.

7 . The dilator of claim 1 , wherein:

the second working surface of the at least one blade comprises a first blade and a second blade, and

the first working surface of the dilator and the second working surface of the first blade and the second blade define a closed operative corridor.

8 . The dilator of claim 1 , wherein the dilator is a unitary instrument.

9 . A system for forming an operative corridor, comprising:

a dilator, a first blade, and a second blade;

the dilator comprising:

a hollow elongate body extending in a longitudinal direction from a proximal end to a distal end, the elongate body having an interior surface and an exterior surface;

the interior surface defining a closed interior passageway having a central axis extending in the longitudinal direction;

the exterior surface being defined by a first working surface and a first attachment surface opposite of the first working surface, the entirety of the first working surface being configured to contact patient skin and the first attachment surface being configured to directly couple to the first blade and the second blade;

the first blade comprising: a second working surface configured to contact patient skin and a second attachment surface, opposite the second working surface, configured to directly couple to the first attachment surface of the dilator;

the second blade comprising: a third working surface configured to contact patient skin and a third attachment surface, opposite the third working surface, configured to directly couple to the first attachment surface of the dilator;

wherein the first working surface of the dilator, the second working surface of the first blade, and the third working surface of the second blade define an outer perimeter of a closed operative corridor, and

wherein, in a cross-section view, the closed operative corridor spans 360 degrees around the central axis, a first angular extent of the first working surface is about 150-170 degrees around the central axis and a second angular extent of the second working surface of the second blade and the third working surface of the third blade, when combined, is about 190-210 degrees around the central axis.

10 . The system of claim 9 , wherein the first working surface of the dilator includes a neuromonitoring surface.

11 . The system of claim 9 , wherein the first working surface of the dilator comprises a smooth curvilinear surface extending in the longitudinal direction.

12 . The system of claim 9 , wherein the first attachment surface comprises at least one first rail portion and at least one second rail portion, the first rail portion being configured to directly couple to at least one first channel portion of the first blade and the second rail portion being configured to directly couple to at least one second channel portion of the second blade.

13 . The system of claim 9 , wherein the dilator is a unitary instrument.

14 . A retractor system for enabling access to a surgical site via an operative corridor, comprising:

a retractor, the retractor comprising:

a first arm and a second arm pivotally coupled together, the first arm being configured to support a first blade and the second arm being configured to support a second blade;

a first handle coupled to the first arm and a second handle coupled to the second arm;

a dilator, the dilator comprising:

a hollow elongate body extending in a longitudinal direction from a proximal end to a distal end, the elongate body having an interior surface and an exterior surface;

the interior surface defining a closed interior passageway having a central axis extending in the longitudinal direction;

the exterior surface being defined by a first working surface and a first attachment surface opposite the first working surface, the entirety of the first working surface being configured to contact patient skin and the first attachment surface being configured to directly couple to the first blade and the second blade;

the first blade comprising: a second working surface configured to contact patient skin and a second attachment surface, opposite the second working surface, configured to directly couple to the first attachment surface of the dilator;

the second blade comprising: a third working surface configured to contact patient skin and a third attachment surface, opposite the third working surface, configured to directly couple to the first attachment surface of the dilator; and

wherein the first working surface of the dilator, the second working surface of the first blade, and the third working surface of the second blade define an outer perimeter of a closed operative corridor, and

wherein, in a cross-section view, the closed operative corridor spans 360 degrees around the central axis, a first angular extent of the first working surface is about 150-170 degrees around the central axis and a second angular extent of the second working surface of the second blade and the third working surface of the third blade, when combined, is about 190-210 degrees around the central axis.

15 . The retractor system of claim 14 , wherein the first blade, second blade, and dilator defining the operative corridor are configured to be simultaneously inserted in patient tissue around an inner dilator.

16 . The retractor system of claim 14 , wherein the dilator is a unitary instrument.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 1, 2022
From: JOSSE, LOIC
To: WARSAW ORTHOPEDIC, INC.
Reel/Frame 060969/0042 →
Continuity (1)
Related Publication 20240065680A1 · Feb 29, 2024
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