Reduced pressure delivery system having a manually-activated pump for providing treatment to low-severity wounds

• US 8,007,257 B2
• Filed: 10/15/2007
• Issued: 08/30/2011
• Est. Priority Date: 10/13/2006
• Status: Active Grant

• Current Assignee: KCI Licensing Incorporated (3M Company)
• Original Assignee: KCI Licensing Incorporated (3M Company)
• Inventors: Hardman, Ian, Heaton, Keith Patrick
• Primary Examiner(s): Hand; Melanie J
• Application Number:
  US11/974,534
• Publication Number:
  US 20080108977A1
• Time in Patent Office: 1,415 Days
• Field of Search: 417/472, 116/306, 116/311, 116/315, 604/6.11, 604/319
• US Class Current: 417/472
• CPC Class Codes: A61M 1/684 bellows-type
• CPC Class Codes: A61M 1/73 comprising sensors or indicators for physical values
• CPC Class Codes: A61M 1/732 Visual indicating means for vacuum pressure
• CPC Class Codes: A61M 1/743 by changing the cross-section of the line, e.g. flow regulating valves A61M1/7413 takes precedence
• CPC Class Codes: A61M 1/78 Means for preventing overflow or contamination of the pumping systems combined with drainage containers A61M1/60
• CPC Class Codes: A61M 1/80 Suction pumps A61M1/64, A61M1/71, A61M60/00 take precedence
• CPC Class Codes: A61M 1/82 Membrane pumps, e.g. bulbs
• CPC Class Codes: A61M 1/84 Drainage tubes; Aspiration tips for negative pressure wound therapy A61M1/90; for surgical cutting instruments A61B17/32
• CPC Class Codes: A61M 1/912 Connectors between dressing and drainage tube
• CPC Class Codes: A61M 1/962 having pumping means on the suction site, e.g. miniature pump on dressing or dressing capable of exerting suction
• CPC Class Codes: A61M 1/98 Containers specifically adapted for negative pressure wound therapy
• CPC Class Codes: A61M 2205/581 by audible feedback
• CPC Class Codes: A61M 2205/7536 allowing gas passage, but preventing liquid passage, e.g. liquophobic, hydrophobic, water-repellent membranes
• 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: A61M 39/24 Check- or non-return valves

Abstract

A manually-activated reduced pressure treatment system includes a substantially rigid housing, and an end cap slidingly received by the housing. An inner chamber is disposed between the end cap and housing, and a volume of the inner chamber is variable in amount depending on the position of the end cap within the housing. The end cap is slidingly movable between an uncompressed position at which the volume of the inner chamber is at a maximum value and a compressed position at which the volume of the inner chamber is at a minimum value. A position indicating member is associated with the end cap and housing to indicate the position of the end cap relative to the housing at predetermined positions between the uncompressed position and the compressed position.

Claims

1. A manually-activated reduced pressure treatment system comprising:

a substantially rigid housing;

an end cap slidingly received by the housing;

an inner chamber disposed between the end cap and housing, a volume of the inner chamber being variable in amount depending on the position of the end cap within the housing, the end cap slidingly movable between an uncompressed position at which the volume of the inner chamber is at a maximum value and a compressed position at which the volume of the inner chamber is at a minimum value;

a position indicating member associated with the end cap and housing to indicate the position of the end cap relative to the housing at predetermined positions between the uncompressed position and the compressed position, wherein the position indicating member further comprises;

one of a plurality of teeth and a pawl disposed on the housing; and

another of the plurality of teeth and the pawl disposed on the end cap, the plurality of teeth and the pawl being configured to mate with one another to indicate the position of the end cap relative to the housing at predetermined positions between the uncompressed position and the compressed position.

2. The system of claim 1, wherein the position indicating member provides audible indication of the end cap being moved from the uncompressed position toward the compressed position.

3. The system of claim 1 further comprising:

a flexible bladder disposed within the housing and constrained by the end cap to form the inner chamber.

4. The system of claim 1 further comprising:

a biasing member positioned between the end cap and the housing to bias the end cap toward the uncompressed position.

5. The system of claim 4 further comprising:

a flexible bladder disposed within the housing and constrained by the end cap to form the inner chamber;

wherein the flexible bladder includes a flexible side wall having a plurality of corrugations; and

wherein the corrugations, when compressed, serve as the biasing member to bias the end cap toward the uncompressed position.