IP Library › Granted Patent US 12,544,271
Granted Patent B2
US 12,544,271 · App. 17/310,319 · Granted Feb 10, 2026

Optical sensing systems and methods for sensor enabled wound dressings and systems

Inventors: Paul Gunning (Hull, GB); Edward Yerbury Hartwell (Hull, GB); Marcus Damian Phillips (Wakefield, GB); Felix Clarence Quintanar (Hull, GB); Charlotte Rose Urwin (Hull, GB)
Assignee: Smith & Nephew PLC
A61F13/00051A61B5/6802A61L15/26A61L2420/02
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Quick Facts
Patent No.
US 12,544,271
App. No.
17/310,319
Filed
Jul 27, 2021
Granted
Feb 10, 2026
Kind
B2
Art Unit
3781
USPC
604/385.01
Abstract

In some cases, a method of coating a wound dressing includes coating a wound facing side of a substantially flexible substrate of the wound dressing with a coating, the wound facing side of the substrate supporting at least one optical sensor and reducing and/or controlling surface texture of the coating to improve detection by the at least one optical sensor. In some cases, a wound dressing includes a substantially flexible substrate supporting at least one optical sensor, the at least one optical sensor including a light source and a detector configured to sense reflected light, a void in the substrate, the void positioned between the light source and the detector, and coating applied to the substrate and covering the at least one optical sensor. The void can prevent transmission of light emitted by the light source to the detector through the coating.

Claims (23)

1 . A wound dressing comprising:

a substantially flexible substrate configured to be positioned in contact with a wound, the substantially flexible substrate supporting at least one optical sensor, the at least one optical sensor comprising a light source and a detector configured to sense reflected light;

a void in the substantially flexible substrate, the void positioned between the light source and the detector and comprising a hole or a slot in a material forming the substantially flexible substrate; and

a coating applied to the substantially flexible substrate and covering the at least one optical sensor, wherein the void is configured to disrupt a light path directly connecting the light source and the detector.

2 . The wound dressing of claim 1 , wherein the void is formed through an entire thickness of the substantially flexible substrate.

3 . The wound dressing of claim 1 , wherein a distance between the light source and the detector is not greater than 10 millimeters.

4 . The wound dressing of claim 1 , wherein coating does not fill an entirety of the void in the substantially flexible substrate.

5 . A method of manufacturing a wound dressing comprising:

forming a void in a substantially flexible substrate supporting at least one optical sensor, the substantially flexible substrate configured to be positioned in contact with a wound, the at least one optical sensor comprising a light source and a detector configured to sense reflected light, the void positioned between the light source and the detector and comprising a hole or a slot in the substantially flexible substrate, wherein the void is configured to disrupt a light path directly connecting the light source and the detector.

6 . The method of claim 5 , wherein the void is formed through an entire thickness of the substantially flexible substrate.

7 . The method of claim 5 , further comprising:

subsequently to forming the void, applying coating to the substantially flexible substrate and covering the at least one optical sensor with coating.

8 . The method of claim 5 further comprising:

prior to forming the void, applying coating to the substantially flexible substrate and covering the at least one optical sensor with coating.

9 . The method of claim 8 , wherein the void is formed through an entire thickness of the substantially flexible substrate.

10 . The method of claim 7 , wherein applying the coating comprises not filling an entirety of the void in the substantially flexible substrate.

11 . The wound dressing of claim 1 , wherein the void is configured to permit fluid to pass through the substantially flexible substrate.

12 . The wound dressing of claim 11 , wherein the void is configured to permit detection of one or more optical properties of the fluid passing through the void.

13 . The method of claim 5 , wherein the void is configured to permit fluid to pass through the substantially flexible substrate.

14 . The wound dressing of claim 1 , wherein the substantially flexible substrate comprises perforations configured to allow fluid to pass through the substantially flexible substrate.

15 . The method of claim 5 , wherein the substantially flexible substrate comprises perforations configured to allow fluid to pass through the substantially flexible substrate.

16 . The wound dressing of claim 1 , wherein the light path is a first light path traveling through the coating and a second light path is configured to travel through the substantially flexible substrate.

17 . The wound dressing of claim 1 , further comprising an absorbent material.

Assignments (3)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 20, 2022
From: GUNNING, PAUL; HARTWELL, EDWARD YERBURY; PHILLIPS, MARCUS DAMIAN; URWIN, CHARLOTTE
To: T.J.SMITH AND NEPHEW,LIMITED
Reel/Frame 060570/0407 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 20, 2022
From: QUINTANAR, FELIX CLARENCE
To: T.J.SMITH AND NEPHEW,LIMITED
Reel/Frame 060570/0448 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 20, 2022
From: T.J.SMITH AND NEPHEW,LIMITED
To: SMITH & NEPHEW PLC
Reel/Frame 060570/0467 →
Priority Claims (1)
GB 1901242 · Jan 30, 2019 · national
Continuity (1)
Related Publication 20220110797A1 · Apr 14, 2022
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