Method for controlling the pain from injections or minor surgical procedures and apparatus for use therewith
The pain associated with an injection or minor surgical procedure at a site on the skin of a patient is reduced by urging a skin engaging surface of a pressure member against the skin proximate the site, thereby stimulating the large diameter afferent sensory nerve fibers in the skin proximate the site and at least partially blocking pain signals from the small diameter afferent pain nerve fibers in the skin proximate the site. An apparatus for use in this method comprises a pressure member having a skin engaging surface adapted to be pressed against the skin of a patient proximate the site to stimulate the large diameter afferent sensory nerve fibers in the skin proximate the site. In certain embodiments, the skin engaging surface is comprised of a plurality of projections extending from the pressure member. Various embodiments include a syringe retainer adapted to be secured to a syringe, and a least one resilient member, such as a spring, resiliently securing the pressure member to the syringe retainer.
1. A method for reducing the pain associated with penetration of the skin of a patient at a site with a needle or surgical instrument, comprising providing a pressure member having a generally flat disk shape and being relatively broad in relation to the thickness of the pressure member, the pressure member having a skin engaging surface comprised of a plurality of projections extending from said pressure member, wherein the disc completely encircles the penetration site and urging the skin engaging surface of the pressure member against the skin of a patient proximate the site, to thereby depress the skin with sufficient force to stimulate the large diameter afferent sensory nerve fibers in the skin proximate the site and at least partially block pain signals from the small diameter afferent pain nerve fibers in the skin proximate the site.
2. The method of claim 1 , wherein the skin engaging surface of the pressure member is urged against the skin proximate the site shortly prior to or at the same time as that the needle or surgical instrument contacts the skin at the site.
3. The method of claim 1 , wherein the pressure member is comprised of a material that is flexible enough to substantially conform to the contours of the skin in the vicinity of the site as the pressure member is urged against the skin.
4. The method of claim 1 , wherein the pressure member is comprised of a flexible, polymeric material.
5. The method of claim 1 , wherein the pressure member is comprised of a rigid material.
6. The method of claim 5 , wherein the pressure member is comprised of metal.
7. The method of claim 1 , wherein the skin engaging surface of the pressure member extends about an aperture formed in the pressure member, and the needle or surgical instrument is introduced through the aperture to contact the skin at the site.
8. The method of claim 1 , wherein the ends of the projections are blunt relative to the end of the needle or surgical instrument being employed.
9. The method of claim 1 , wherein the perimeter of the pressure member is formed with at least one noncircular section to facilitate handling of the pressure member.
10. The method of claim 9 , wherein the perimeter of the pressure member defines a generally cloverleaf shape.
11. The method of claim 1 , wherein when the skin engaging surface of the pressure member is urged against the skin proximate the site, the skin engaging surface substantially conforms to the contours of the skin proximate the site.
12. The method of claim 1 , wherein the perimeter of the pressure member defines a circular shape.
13. The method of claim 1 , wherein the perimeter of the pressure member defines a generally oval shape.