Injection patch

• US 5,728,071 A
• Filed: 09/09/1996
• Issued: 03/17/1998
• Est. Priority Date: 09/09/1996
• Status: Expired due to Fees

• Current Assignee: Robert L. Watson, William R. Knepshield
• Original Assignee: Robert L. Watson, William R. Knepshield
• Inventors: Knepshield, William R., Watson, Robert L.
• Primary Examiner(s): Rimell, Sam
• Assistant Examiner(s): Racunas, Robert V.
• Application Number:
  US08/708,833
• Time in Patent Office: 554 Days
• Field of Search: 604/174, 604/180, 604/304, 604/305, 604/307
• US Class Current: 604/180
• CPC Class Codes: A61F 13/0206 with absorbent fibrous layers, e.g. woven or non-woven absorbent pads or island dressings
• CPC Class Codes: A61F 13/0226 characterised by the support layer
• CPC Class Codes: A61F 2013/00438 blood tests

Abstract

An injection patch for facilitating injection into a patient and for confining blood from the injection wound has an absorbent pad against the skin of a patient around an intended injection site and a second surface. An elastomeric, self-sealing membrane through which an injection needle can penetrate lies against the second surface of the pad and closes the central opening. A cover layer with a central opening overlies the membrane and exposing a central portion of it to identify the injection site. The patch is adhesively held to the patient'"'"'s skin. An injection can be made with a needle passed through the membrane and the patient'"'"'s skin, after which the needle is extracted while the membrane wipes the needle, reseals and forms a cavity with the pad and the patient'"'"'s skin to contain blood from the injection site until after hemostasis.

Claims

1. An injection patch for facilitating injection into a patient and for confining blood from the injection wound comprising

a generally annular absorbent pad having a first surface to be placed against the skin of a patient around an intended injection site, a second surface opposite said first surface and a central opening;

an elastomeric, self-sealing membrane through which an injection needle can penetrate, said membrane lying against said second surface and closing said central opening, said membrane, in use, being spaced from the patient'"'"'s skin and forming a cavity between said membrane and said skin surrounded by said absorbent pad;

a cover layer having a central opening substantially aligned with said central opening of said pad and exposing a central portion of said membrane to identify the injection site; and

means for adhesively holding said patch on the patient'"'"'s skin, whereby an injection can be made with a needle passed through said membrane and the patient'"'"'s skin, after which injection said membrane wipes said needle as said needle is withdrawn and said cavity between said pad and the patient'"'"'s skin contains blood from the injection site until after hemostasis.

2. A patch according to claim 1 wherein said cover layer is generally circular and has a larger diameter than said pad.

3. A patch according to claim 2 wherein said membrane is generally circular and has a larger diameter than said central opening of said cover layer and a smaller diameter than said pad.

4. A patch according to claim 3 wherein said membrane and said pad are adhesively attached to said cover layer.