Blood withdrawal patch

摘要

A blood withdrawal patch for facilitating withdrawal from a patient and for confining blood from the needle wound has an absorbent pad with a first surface to be placed against the skin of a patient around an intended injection site, a second surface opposite the first surface and a central opening. A transparent, elastomeric, self-sealing membrane through which an injection needle can penetrate lies in the pad central opening. A transparent cover layer has a central opening substantially aligned with the central opening of the pad to expose a central portion of the membrane to identify the withdrawal site, the cover layer being adhered to the membrane and the pad. The patch is adhesively held on the patient's skin. A blood vessel is visually located through the membrane and cover and a needle is passed through the membrane and the patient's skin into the vessel for blood withdrawal. After withdrawal, the needle is extracted, and the membrane wipes the needle and forms a cavity with the pad and the patient's skin to contain blood from the withdrawal site until after hemostasis. The patch is also useful for installation of a catheter.