Hemostatic transdermal injection appliance
First Claim
1. An hemostatic appliance for application to the skin of a patient comprising the combination ofa first layer of foam material having a proximal surface and a distal surface relative to the patient;
- an annular layer of foam material having a distal surface adhered to said proximal surface of said first layer, a proximal surface and a central cavity extending entirely through said annular layer;
adhesive means on said proximal surface of said annular layer for adhering said annular layer to skin of a patient;
a continuous elastomeric membrane extending across said central cavity adjacent said first layer and closing a distal side of said cavity; and
a layer of hemostatic material in said cavity adjacent to said membrane, said hemostatic layer having a distal surface against said membrane and a proximal surface exposed through a proximal side of said cavity whereby, when said appliance is placed on the skin of a patient with said proximal side of said cavity toward a wound or puncture site, said annular layer of foam forms an adherent seal with the skin of the patient and inhibits flow of body fluids along the patient'"'"'s skin, thereby encouraging flow of said fluids to said hemostatic layer so that said hemostatic layer encourages hemostasis.
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Accused Products
Abstract
An elastic, hemostatic appliance for application to the skin of a patient has a first layer of foam material having a proximal surface and a distal surface relative to the patient and an annular layer of foam material having a distal surface adhered to the proximal surface of the first layer, a proximal surface and a central cavity extending entirely through the annular layer. The proximal surface of the annular layer has adhesive for adhering to the skin of the patient. A continuous elastomeric membrane extends across the central cavity adjacent the first layer and closing the distal side of the cavity. A layer of hemostatic material is in the cavity adjacent the membrane, the hemostatic layer having a distal surface against the membrane and a proximal surface exposed through the cavity to a fenestrated membrane so that when the appliance is placed on the skin of a patient with the proximal side of the cavity toward a wound, the annular body inhibits flow of body fluids along the patient'"'"'s skin and the hemostatic layer encourages hemostasis when contacted by body fluids from the wound. The fenestrated membrane closes the proximal opening of the cavity adjacent the hemostatic layer to promote passage of body fluids to the hemostatic layer. A needle guide with a coupling part at its distal end can be provided for attachment to a mating coupling part of a self-sheathing, retractable needle assembly for closed system injections.
37 Citations
18 Claims
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1. An hemostatic appliance for application to the skin of a patient comprising the combination of
a first layer of foam material having a proximal surface and a distal surface relative to the patient; -
an annular layer of foam material having a distal surface adhered to said proximal surface of said first layer, a proximal surface and a central cavity extending entirely through said annular layer; adhesive means on said proximal surface of said annular layer for adhering said annular layer to skin of a patient; a continuous elastomeric membrane extending across said central cavity adjacent said first layer and closing a distal side of said cavity; and a layer of hemostatic material in said cavity adjacent to said membrane, said hemostatic layer having a distal surface against said membrane and a proximal surface exposed through a proximal side of said cavity whereby, when said appliance is placed on the skin of a patient with said proximal side of said cavity toward a wound or puncture site, said annular layer of foam forms an adherent seal with the skin of the patient and inhibits flow of body fluids along the patient'"'"'s skin, thereby encouraging flow of said fluids to said hemostatic layer so that said hemostatic layer encourages hemostasis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of performing a blood withdrawal procedure on a patient comprising the steps of
providing an appliance having a body of foam material having a proximal surface and a distal surface relative to the patient, a central recess extending inwardly from the proximal surface to a back wall, an adhesive on the proximal surface of the body for adhering the appliance to the skin of a patient, a continuous elastomeric membrane extending across the central recess adjacent the back wall and closing a distal side of the cavity, a layer of hemostatic material in the cavity adjacent the membrane, and a needle guide passage extending from the distal surface to the elastic membrane and having a distal end and a proximal end relative to the patient, in sequence, passing a needle into the guide passage from the distal end and through the elastomeric membrane and hemostatic material until the needle protrudes beyond the proximal surface of the foam body, visually positioning the needle at a vein or artery to be penetrated, penetrating the vein or artery, withdrawing blood therefrom, sliding the appliance along the needle until the proximal surface of the annular layer is against and adhered to the patient'"'"'s skin, and extracting the needle from the appliance, leaving the appliance adhered to the patient'"'"'s skin to contain fluids and promote hemostasis.
Specification