US 12,484,913 B2
Joint revision surgery apparatus
Mark B. Wright, Jackson, ID (US)
Assigned to MAP Medical Solutions, LLC, Twin Falls, ID (US)
Filed by MAP Medical Solutions, LLC, Rupert, ID (US)
Filed on Dec. 6, 2021, as Appl. No. 17/542,636.
Application 17/542,636 is a continuation in part of application No. 17/218,000, filed on Mar. 30, 2021, granted, now 11,992,422.
Prior Publication US 2022/0313282 A1, Oct. 6, 2022
Int. Cl. A61B 17/16 (2006.01); A61B 17/17 (2006.01)
CPC A61B 17/1668 (2013.01) [A61B 17/1637 (2013.01); A61B 17/1717 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A system for joint revision surgery comprising:
(a) a surgical knife blade guide block having two half sections which when assembled form an assembled surgical knife blade guide block having a centrally located cavity and a forwardly located surgical knife blade guide slot, wherein each half section has a front portion and a rear portion, and each half section has a top surface and a bottom surface;
(b) a stem trunnion securing member mountable within said central cavity and secured to said assembled surgical knife blade guide block using a nut;
(c) an adjustable guide pressure plate located within said forwardly located surgical knife blade guide slot having an upper portion and a lower portion, and further wherein said upper portion of said adjustable guide pressure plate is secured to said assembled knife blade guide block, and said lower portion of said adjustable guide pressure plate is configured to be movable within said forwardly located surgical knife blade guide slot;
(d) a knurled threaded knob threaded through said assembled surgical knife blade guide block configured to adjust the adjustable guide pressure plate inwardly and outwardly when rotated clockwise and counterclockwise;
(e) one or more surgical knife blade guide slots for accepting surgical knife blades, located in the rear portion of said assembled surgical knife blade guide block; and
(f) a plurality of rigid and flexible, curved and straight surgical knife blades;
wherein said assembled surgical knife blade guide block is affixed to an implanted femoral stem for extraction by attaching said stem trunnion securing member to the trunnion of said stem, and then extending said flexible surgical knife blades down through said forwardly located surgical knife blade guide slot and extending said rigid surgical knife blades down through said rearward slots and further extending said flexible and rigid surgical knife blades down through said forwardly located surgical knife blade guide and rearward slots to reach the femoral stem and thereby cut the femoral stem free from the femur bone.