Delivery tube, system, and method for storing liquid from a tissue site

• US 8,267,908 B2
• Filed: 11/21/2008
• Issued: 09/18/2012
• Est. Priority Date: 02/09/2007
• Status: Active Grant

• Current Assignee: Solventum Intellectual Properties Company (Solventum Corp.)
• Original Assignee: KCI Licensing Incorporated (3M Company)
• Inventors: Coulthard, Richard Daniel John
• Primary Examiner(s): Zalukaeva, Tatyana
• Assistant Examiner(s): TREYGER, ILYA Y
• Application Number:
  US12/275,417
• Publication Number:
  US 20090124988A1
• Time in Patent Office: 1,397 Days
• Field of Search: 604/313, 604/315, 604/317, 604/318, 604/319
• US Class Current: 604/313
• CPC Class Codes: A61M 1/915 Constructional details of the pressure distribution manifold
• CPC Class Codes: A61M 1/94 with gas supply means
• CPC Class Codes: A61M 1/982 with means for detecting level of collected exudate
• CPC Class Codes: A61M 2025/0034 characterized by elements which are assembled, connected or fused, e.g. splittable tubes, outer sheaths creating lumina or separate cores
• CPC Class Codes: A61M 2025/0036 with more than four lumina
• CPC Class Codes: A61M 2025/0246 fixed on the skin having a cover for covering the holding means
• CPC Class Codes: A61M 25/003 characterized by features relating to least one lumen located at the distal part of the catheter, e.g. filters, plugs or valves catheter tips A61M25/0067
• CPC Class Codes: A61M 25/0032 characterized by at least one unconventionally shaped lumen, e.g. polygons, ellipsoids, wedges or shapes comprising concave and convex parts
• CPC Class Codes: A61M 25/02 Holding devices, e.g. on the body
• CPC Class Codes: A61M 27/00 Drainage appliance for wounds or the like , i.e. wound drains, implanted drains negative pressure wound therapy devices A61M1/90; implements for holding wound open A61B17/02 ; middle ear drainage A61F11/202
• CPC Class Codes: Y10T 29/49826 Assembling or joining

Abstract

An apparatus, system, and method for storing liquid from a tissue site are presented. The apparatus includes a delivery tube that may have at least one lumen. The delivery tube may be operable to transmit reduced pressure to the tissue site and to receive liquid from the tissue site. The apparatus may also include an absorbent material disposed in the at least one lumen. The absorbent material may be operable to absorb the liquid from the tissue site. The delivery tube may be formed with a number of recesses.

Claims

1. A system for storing liquid from a tissue site, the system comprising:

a reduced pressure source operable to supply reduced pressure;

a manifold adapted to distribute the reduced pressure;

a delivery tube having at least one lumen, the delivery tube operable to transmit the reduced pressure from the reduced pressure source to the manifold, the delivery tube operable to receive the liquid from the tissue site via the manifold;

wherein the at least one lumen has a plurality of ribs and recesses; and

an absorbent material disposed in the at least one lumen in at least the plurality of recesses, the absorbent material operable to absorb the liquid from the tissue site.

2. An apparatus for storing liquid from a tissue site, the apparatus comprising:

a delivery tube having at least one lumen, the delivery tube operable to transmit reduced pressure to the tissue site and to receive liquid from the tissue site;

wherein the at least one lumen has a plurality of recesses; and

an absorbent material disposed in the at least one lumen in at least the plurality of recesses, the absorbent material operable to absorb the liquid from the tissue site.

3. The apparatus of claim 2, wherein the absorbent material at least partially covers an inner surface of the at least one lumen.

4. The apparatus of claim 2, wherein the at least one lumen includes a plurality of ribs, and wherein the plurality of recesses are separated from one another by a rib in the plurality of ribs.

5. The apparatus of claim 4, wherein the absorbent material is disposed in all of the plurality of recesses.

6. The apparatus of claim 4, wherein the at least one lumen includes a central reduced pressure passage when the absorbent material is saturated with the liquid from the tissue site.

7. The apparatus of claim 2, wherein at least one wall of each of the plurality of recesses has a substantially semi-circular cross-sectional shape.

8. The apparatus of claim 7, wherein each of the plurality of recesses is an elongated recess that extends along at least a portion of the length of the delivery tube.

9. The apparatus of claim 8, wherein each of the plurality of recesses extends along an entire length of the delivery tube.

10. The apparatus of claim 3, wherein the absorbent material covers an entire inner surface of the at least one lumen.

11. The apparatus of claim 2, wherein the absorbent material is an absorbent core disposed in the at least one lumen.

12. The apparatus of claim 11, wherein the absorbent core expands as the absorbent core absorbs liquid from the tissue site.

13. The apparatus of claim 11, wherein the absorbent core is a cylindrical absorbent core, and wherein the cylindrical absorbent core is flexible.

14. The apparatus of claim 13, wherein the absorbent core has a substantially circular cross-sectional shape.

15. The apparatus of claim 11, wherein at least one of the plurality of recesses is a reduced pressure delivery recess for delivering the reduced pressure, and wherein the liquid from the tissue site is unable to enter the reduced pressure delivery recess.

16. The apparatus of claim 15, wherein at least one of the plurality of recesses is a collection recess for storing liquid from the tissue site.

17. The apparatus of claim 2, wherein the liquid is exudate from a wound.

18. The apparatus of claim 2, wherein the absorbent material includes at least one of super absorbent fiber, super absorbent particulates, hydrofiber, sodium carboxymethyl cellulose, and alginates.

19. A system for storing liquid from a tissue site, the system comprising:

a reduced pressure source operable to supply reduced pressure;

a manifold adapted to distribute the reduced pressure;

a delivery tube having at least one lumen, the delivery tube operable to transmit the reduced pressure from the reduced pressure source to the manifold, the delivery tube operable to receive the liquid from the tissue site via the manifold; and

wherein the at least one lumen is formed with a plurality of recesses; and

an absorbent material covering the plurality of recesses.