Fluid collection

Patent metadata

Field	Value
Publication number	US-11141520-B2
Application number	US-201816118198-A
Country	US
Kind code	B2
Filing date	Aug 30, 2018
Priority date	Feb 27, 2008
Publication date	Oct 12, 2021
Grant date	Oct 12, 2021

Abstract

An apparatus and method for collecting fluid are disclosed. The apparatus includes a body portion comprising a fluid inlet and an outlet, an expandable container secured to the body portion, at least one wicking element extending from within the body portion into the container, and at least one super absorber element arranged inside the container.

First claim

What is claimed is:

1. Fluid collection apparatus for use in a negative pressure wound therapy procedure, comprising:
an expandable container, the container comprising:
a body portion comprising a fluid inlet and an outlet and defining a fluid flow path between the inlet and the outlet;
the expandable container in the form of a flexible bag;
wherein the flexible bag contains wicking material configured to wick fluid away from the fluid flow path and super absorber material configured to trap and store fluid removed from a wound site; and

a wound dressing configured to be in fluid communication with the fluid inlet of the body portion.

2. The apparatus of claim 1 , wherein the apparatus is configured such that, when operating under vacuum, fluid from the wound site enters the bag and comes into contact with the wicking material.

3. The apparatus of claim 1 , wherein the apparatus is configured such that liquid is trapped by the wicking material and transported via capillary action to the super absorber material.

4. The apparatus of claim 1 , wherein the wicking material and super absorber material are configured to prevent the bag completely collapsing under vacuum such that the sides of the bag are not able to wholly collapse and touch together.

5. The apparatus of claim 1 , wherein the bag is configured to expand as the super absorber material absorbs more and more liquid.

6. The apparatus of claim 1 , wherein the super absorber material is able to absorb liquid at compression pressures of up to 200 mmHg.

7. The apparatus of claim 1 , wherein the super absorber material is formed as sheets in the dry state.

8. The apparatus of claim 1 , further comprising a plurality of sheets of super absorbent material spaced apart in a substantially parallel arrangement and located between the wicking material and an inner surface of the container.

9. The apparatus of claim 1 , wherein the super absorber material is provided in a powdered or granular form.

10. The apparatus of claim 1 , wherein a screen is incorporated within the body portion to prevent migration of the super absorber material from within the flexible bag to the inlet or outlet.

11. The apparatus of claim 1 , further comprising:
a pathogen filter located at the inlet and/or outlet.

12. The apparatus of claim 1 , wherein the flexible bag is hermetically secured to a bottom region of the body portion.

13. The apparatus of claim 1 , further comprising a pump configured to apply a negative pressure at the wound site.

14. The apparatus of claim 13 , further comprising a tube or pipe to connect the fluid collection apparatus to the wound site.

15. The apparatus of claim 14 , wherein the apparatus is arranged to trap and store liquid in the super absorber material as fluid is drawn through the inlet by a negative pressure applied at the outlet.

16. The apparatus of claim 1 , wherein the wicking material comprises an elongate section extending into the canister along substantially the entire length of the canister.

17. The apparatus of claim 1 , further comprising a tube or pipe configured to provide fluid communication between the wound dressing and the inlet.

Assignees

• Smith & Nephew

Inventors

• Hartwell Edward Yerbury
• Chappel Jonathan
• Bannister Neill Philip

Classifications

• A61M1/884

  Draining devices provided with means for filtering out the harmless water content before discarding the drainage container · CPC title

• A61M1/71 Primary

  Suction drainage systems (containers therefor A61M1/60, A61M1/64; negative pressure wound therapy systems A61M1/90) · CPC title

• A61M1/88

  Draining devices having means for processing the drained fluid, e.g. an absorber (for liposuction A61M1/892) · CPC title

• A61M1/98

  Containers specifically adapted for negative pressure wound therapy · CPC title

• A61M1/604 Primary

  Bag or liner in a rigid container, with suction applied to both · CPC title