Straight and curved femoral broach impactor adapters

Abstract

An orthopedic instrument can include an elongated body (12) having a broach end (16) and a striker end (14). The body can be straight or curved. A latch lever (44) can be pivotally coupled to the elongated body. The latch lever is movable between an open position and a latched position in which the latch lever is retained within the body. A surgical broach can be rigidly attached to the broach end of the elongated body. An automated surgical striker can be attached to the striker end.

Description

Technical Field

[0001] This disclosure relates in general to orthopedic surgical instruments for performing orthopedic joint replacement surgery, and more specifically to orthopedic surgical instruments for performing hip replacement surgery. Background Technology

[0002] Arthroplasty is a well-known surgical procedure that replaces a diseased and / or damaged natural joint with a prosthetic joint. For example, in hip arthroplasty, the patient's natural ball-and-socket joint is partially or completely replaced by a prosthetic hip joint. A typical prosthetic hip joint consists of an acetabular prosthesis component and a femoral head prosthesis component. The acetabular prosthesis component typically comprises an outer shell and an inner support or liner. The outer shell is configured to engage the patient's acetabulum, and the inner support or liner is attached to the shell and configured to engage the femoral head. The femoral head prosthesis component and the acetabular component's liner form a ball-and-socket joint close to the natural hip joint.

[0003] Typical arthroplasty surgery involves impacting surgical instruments (e.g., broaches, chisels, or other cutting tools) and / or prosthetic implants into the patient's bone. Historically, impacts were performed by orthopedic surgeons manually striking the surgical instruments with a surgical mallet or hammer. This manual impact can be unpredictable and imprecise. Additionally, typical manual impact instruments may require the surgeon to hold the instrument with one hand and strike it with a mallet held by the surgeon's other hand.

[0004] Some automated surgical impactors are capable of performing a series of percussion impacts, each delivering a controlled amount of impact energy. Automated surgical impactors can be used with one or more adapters to connect to a variety of surgical instruments and / or implants. Typical adapters use a rigid drive system to connect to the surgical instruments and / or implants, which includes one or more drive shafts, gear trains, or other rigid mechanical connections. Summary of the Invention

[0005] According to one aspect, an orthopedic surgical instrument includes an elongated body, a first rod and a second rod, a leaf spring, and a push-button latch coupled to the elongated body. The elongated body extends from a first end to a second end. The first end is configured to be received by an automated surgical impactor. The first rod extends from a pivot end to a latching end. The pivoting end is pivotally coupled to the elongated body. The second rod is pivotally coupled to the elongated body and includes a hook extending toward a top surface of the elongated body. The leaf spring has a first end pivotally coupled to the first rod and a second end pivotally coupled to the second rod, such that movement of the first rod causes movement of the second rod. The first rod is movable between a first position, in which the latching end is spaced apart from the elongated body, and in the second position, in which the latching end is captured by the push-button latch. When the first rod is in the second position, the leaf spring pushes the second rod to pivot the hook toward the top surface. In one embodiment, the elongated body includes a curved section located between the pivoting end of the first rod and the second end of the elongated body.

[0006] In one embodiment, the elongated body includes: a top surface having an elongated opening defined therein; a bottom surface opposite the top surface and having an elongated opening defined therein; one or more inner walls extending between the elongated opening defined in the top surface and the elongated opening defined in the bottom surface; and a first cavity defined by the one or more inner walls. A second rod is positioned within the first cavity, and a pivotal end of the first rod is pivotally coupled to the elongated body within the first cavity. A latching end of the elongated rod extends out of the first cavity through the elongated opening defined in the top surface. A leaf spring is positioned within the first cavity.

[0007] In one embodiment, the elongated body includes a flat front surface positioned on a second end of the elongated body, and a circular opening is defined in the flat front surface. The circular opening leads to a first cavity. In one embodiment, the circular opening defines a channel into an internal cavity, the channel being sized to receive a mounting post of a surgical retractor. When the first rod is in a second position, a hook of a second rod is positioned in the channel. In one embodiment, a guide pin extends outward from the flat front surface of the elongated body. The guide pin is positioned between the circular opening and a bottom surface.

[0008] In one embodiment, the orthopedic instrument further includes a first stop pin coupled to an elongated body and positioned within a first cavity. When the first rod is in a first position, the bottom surface of the pivot end of the first rod contacts the first stop pin.

[0009] In one embodiment, the elongated body includes: a first sidewall and a second sidewall opposite to the first sidewall; an opening defined in the first sidewall; one or more inner walls extending inwardly from the opening in the first sidewall, wherein the one or more inner walls define a second cavity; and a second opening defined in a top surface between a first end and the elongated opening, wherein the second opening leads to the second cavity. A push-button latch is positioned in the second cavity. When the first lever is in a second position, a latch extending downward from the latch end is positioned in the second cavity and held by the push-button latch. In one embodiment, the push-button latch is movable between a first position in which the push-button latch engages the latch positioned in the second cavity, and in a second position in which the push-button latch does not engage the latch. In one embodiment, the orthopedic instrument further includes a second spring positioned in the second cavity. The second spring is configured to bias the push-button latch in the first position.

[0010] In one embodiment, the button latch includes: a button surface positioned toward a first sidewall of an elongated body; a pair of sidewalls extending from the button surface into a second cavity; a rear wall connecting the pair of sidewalls; and a latching member extending from the rear wall into the second cavity. In one embodiment, the latch of the elongated rod includes a first cam surface, and the latching member of the button latch includes a second cam surface. When the first rod moves from a first position to a second position, the first cam surface engages the second cam surface, and when the first cam surface engages the second cam surface, the button latch is pushed from the first position to the second position.

[0011] According to another aspect, a method for performing orthopedic surgery includes: inserting a mounting post of a surgical retractor into a circular opening defined in a flat surface positioned at a first end of an orthopedic instrument; moving a first rod of the orthopedic instrument from a first position to a second position in response to inserting the mounting post into the circular opening, wherein moving the first rod from the first position to the second position includes: latching the first rod in the second position, applying compression to a second rod of the orthopedic instrument using a compliant member of the orthopedic instrument, and clamping a hook of the second rod onto the mounting post of the surgical retractor; and engaging a second end of the orthopedic instrument to an automated surgical impactor in response to moving the rod.

[0012] In one embodiment, clamping the hook of the second rod onto the mounting post includes engaging a notch defined in the mounting post with a first side of the hook's curved outer surface. In one embodiment, inserting the mounting post includes engaging a second side of the hook's curved outer surface with a bevel defined in the tip of the mounting post, wherein engaging the second side includes pivoting the hook away from the centerline of the circular opening.

[0013] In one embodiment, the method further includes: impacting a surgical retractor into the surgically prepared bone of a patient using an automated surgical impactor in response to engaging a second end to the automated surgical impactor; depressing a button latch of an orthopedic instrument in response to impacting the retractor, wherein depressing the button latch includes unlocking a second lever from a second position and releasing compression using a compliant member; and releasing the surgical retractor from a first end of the orthopedic instrument in response to depressing the button latch.

[0014] In one embodiment, the method further includes: removing a surgical retractor from surgically prepared bone using an automated surgical impactor in response to impacting the surgical retractor; wherein a button latch is pressed in response to removing the surgical retractor. In one embodiment, the method further includes inserting a mounting post of a second surgical retractor into a circular opening defined in a flat surface located at a first end of an orthopedic instrument in response to releasing the surgical retractor.

[0015] According to another aspect, a surgical instrument assembly includes an orthopedic instrument and a surgical retractor. The orthopedic instrument includes: an elongated body, a first rod and a second rod, a leaf spring, and a push-button latch connected to the elongated body. The elongated body extends from a first end to a second end. The first end is configured to be received by an automated surgical impactor. The first rod extends from a pivot end to a latching end. The pivoting end is pivotally connected to the elongated body, and the second rod is also pivotally connected to the elongated body. The second rod includes a hook extending toward a top surface of the elongated body. The leaf spring has a first end pivotally connected to the first rod and a second end pivotally connected to the second rod, such that movement of the first rod causes movement of the second rod. The surgical retractor includes a mounting post extending from the first end of the surgical retractor and is connected to the second end of the orthopedic instrument. The first rod of the orthopedic instrument is movable between a first position in which the latching end is spaced apart from the elongated body, and in the second position in which the latching end is captured by the push-button latch. When the first lever is in the second position, the leaf spring pushes the second lever to cause the hook pivot to engage with the mounting post of the surgical retractor.

[0016] In one embodiment, the elongated body includes: a top surface having an elongated opening defined therein; a bottom surface opposite the top surface and having an elongated opening defined therein; one or more inner walls extending between the elongated opening defined in the top surface and an elongated opening defined in the bottom surface; and a first cavity defined by the one or more inner walls. A second rod is positioned within the first cavity. A pivotal end of the first rod is pivotally coupled to the elongated body within the first cavity. A latching end of the elongated rod extends out of the first cavity through the elongated opening defined in the top surface. A leaf spring is positioned within the first cavity. Attached Figure Description

[0017] The specific implementation method refers to the following figures, in which: Figure 1 This is a perspective view of a straight broach impactor adapter in its open configuration; Figure 2 yes Figure 1 Cross-sectional elevation view of a straight broach impactor adapter; Figure 3 It is in a latch configuration. Figure 1 Perspective view of a straight broach impactor adapter; Figure 4 yes Figure 3 Cross-sectional elevation view of a straight broach impactor adapter; Figure 5 yes Figure 3 Rear cross-sectional view of a straight broach adapter; Figure 6 yes Figures 1 to 5 An elevation view of a straight retractor impactor adapter, which is connected to a femoral retractor and is in an open configuration; Figure 7 yes Figure 6 A partial cross-sectional elevation view of the straight baffle impactor adapter and the femoral baffle. Figure 8 yes Figures 1 to 5 An elevation view of a straight puller impactor adapter, which is attached to the femoral puller and is in a latching configuration; Figure 9 yes Figure 8 A partial cross-sectional elevation view of a straight broach impactor and a femoral broach; Figure 10 During orthopedic surgery using an automated surgical impactor Figures 8 to 9 Perspective view of the straight baffle impactor adapter and femoral baffle; Figure 11 This is a perspective view of a bent broach impactor adapter in an open configuration; Figure 12 yes Figure 11 Cross-sectional elevation view of a curved broach impactor adapter; Figure 13 It is in a latch configuration. Figure 11 Perspective view of a curved broach impactor adapter; Figure 14 yes Figure 13 Cross-sectional elevation view of a curved broach impactor adapter; Figure 15 yes Figure 13 Rear cross-sectional view of a curved broach adapter; Figure 16 yes Figures 11 to 15 An elevation view of a curved retractor impactor adapter, which is connected to a femoral retractor and is in an open configuration; Figure 17 yes Figure 16 A partial cross-sectional elevation view of a curved baffle impactor adapter and a femoral baffle. Figure 18 yes Figures 11 to 15 An elevation view of a curved baffle impactor adapter, which is attached to a femoral baffle and is in a latching configuration; Figure 19 yes Figure 18 A partial cross-sectional elevation view of a curved broach impactor and a femoral broach; and Figure 20 During orthopedic surgery using an automated surgical impactor Figures 18 to 19 Perspective view of the curved broach impactor adapter and the femoral broach. Detailed Implementation

[0018] While the concepts of this disclosure are readily available in various modifications and alternatives, specific exemplary embodiments thereof have been shown by way of example in the accompanying drawings and will be described in detail herein. However, it should be understood that the concepts of this disclosure are not intended to be limited to the specific forms disclosed, but rather are intended to cover all modifications, equivalents, and alternatives within the spirit and scope of the invention as defined by the appended claims.

[0019] Throughout this specification, when referring to orthopedic implants and orthopedic instruments described herein, as well as the natural anatomy of a patient, terms indicating anatomical reference, such as anterior, posterior, medial, lateral, superior, inferior, etc., may be used. These terms have well-known meanings in anatomical studies and orthopedic surgery. Unless otherwise stated, these anatomical reference terms used in the written details and claims are intended to be consistent with their well-known meanings. Furthermore, it should be understood that terms such as “top,” “bottom,” “anterior,” “posterior,” “side,” “height,” “length,” “width,” “superior,” “inferior,” etc., that may be used herein merely describe reference points and do not necessarily limit the embodiments of this disclosure to any particular orientation or configuration.

[0020] Now for reference Figures 1 to 5A straight femoral retractor impactor adapter 10 (hereinafter referred to as impactor adapter 10) is shown. Impactor adapter 10 is an orthopedic instrument; that is, a surgical tool used by a surgeon when performing orthopedic surgery. Again, it should be understood that, as used herein, the term "orthopedic instrument" is different from orthopedic implants or prostheses surgically inserted into a patient's body. As further described below, impactor adapter 10 can be used with an automated surgical impactor to drive a femoral retractor into the surgically prepared bone of the patient.

[0021] like Figures 1 to 4 As shown, the impactor adapter 10 includes an elongated body 12 extending from an angled impactor attachment end 14 to a puller end 16. In an exemplary embodiment, the body 12 is formed of a metallic material, such as, for example, stainless steel or cobalt-chromium. The body 12 is generally linear and defines a longitudinal tool axis 18. As further described below, in use, the impactor end 14 (also referred to as the rear end or proximal end) can be attached to an automated surgical impactor tool. Similarly, in use, the puller end 16 (also referred to as the tip, front end, or distal end) can be attached to a surgical puller, chisel, or other surgical cutting tool.

[0022] The elongated body 12 is generally rectangular in cross-section, and thus has a top surface 20 and a bottom surface 22 opposite to the top surface 20, as well as a pair of side surfaces 24, 26. A pair of elongated openings 28, 30 are defined in each of the top surface 20 and the bottom surface 22, respectively. One or more inner walls 32 extend through the body 12 between the openings 28, 30 and define a cavity 34 within the body 12.

[0023] The retractor end 16 includes a flat surface 36 defining a circular opening 38 thereon. A channel 40 extends inwardly from the circular opening 38 into a cavity 34. A guide pin 42, positioned on the flat surface 36 between the circular opening 38 and a bottom surface 32, extends outwardly from the flat surface 36. As further described below, when the impactor adapter 10 is coupled to the femoral surgical retractor, the opening 38 receives a mounting post of the retractor.

[0024] The impactor adapter 10 also includes an elongated latching bar 44 that extends outward from the cavity 34 through an opening 28 defined in the top surface 20. The latching bar 44 includes a pivoting end 46 that is pivotally mounted to the body 12 within the cavity 34. Exemplarily, an orifice 48 is defined through the pivoting end 46, and a pair of circular openings 50 are defined through the side surfaces 24, 26 of the body 12. The orifice 48 surrounds the pivot point of the latching bar 44. A pin 52 is positioned in the orifice 48 and the openings 50 such that the latching bar 44 engages with the body 12 and is allowed to rotate about the pin 52. In an exemplary embodiment, the pin 52 is press-fitted into the opening 50; however, any suitable method can be used to secure the pin 52.

[0025] Another pair of circular openings 54 are defined to extend through the side surfaces 24, 26 of the body 12. A first stop pin 56 is positioned within the opening 54. In an exemplary embodiment, the first stop pin 56 is press-fitted into the opening 54; however, any suitable method can be used to secure the first stop pin 56. Figure 2 As shown, when the lever 44 reaches the open position, the lower surface 58 of the pivot end 46 engages the first stop pin 56. Therefore, the first stop pin 56 serves as a stop to limit the range of motion of the lever 44.

[0026] The body 60 of the latch lever 44 extends outwardly from a pivot end 46 through an opening 28 defined in the top surface 20. A wing 62 extends laterally from the body 60. The body 60 further extends toward the latch end 64. The latch end 64 includes a latch 66 extending downward from the lever body 60. Figure 5 As shown in the cross-sectional view, latch 66 includes a lower cam surface 68 and an upper surface 70 extending inwardly toward the interior of body 12. As further described below, when lever 44 is in the position... Figures 3 to 5 When in the latched position shown, the latch 66 of the latch lever 44 can be captured within the body 12 by the snap-fit ​​mechanism.

[0027] In the latched position, the body 60 of the lever 44 can contact the top surface 20 of the body 12, acting as a stop to limit the range of motion of the lever 44. In the latched position, the wing 62 of the lever 44 extends outward beyond the side surface 24, thereby allowing a surgeon or other user to grip the lever 44. As described above, the latch lever 44 is capable of... Figures 1 to 2 The opening position shown is the same as Figures 3 to 5 The lever 44 moves between the indicated latch positions. The travel of lever 44 (i.e., the angle between the body 60 and the body 12 of lever 44 when lever 44 is in the fully open position) can be limited to less than about 40-45 degrees.

[0028] The impactor adapter 10 also includes a clamping rod 72 positioned within a cavity 34. The clamping rod 72 includes a body 74 having a generally triangular, non-linear shape. The clamping rod 72 is pivotally mounted to the body 12 within the cavity 34. Exemplarily, an orifice 76 is defined through the rod body 74, and a pair of circular openings 78 are defined through the side surfaces 24, 26 of the body 12. The orifice 76 surrounds the pivot point of the clamping rod 72. A pin 80 is positioned in the orifice 76 and the openings 78 such that the clamping rod 72 engages with the body 12 and is allowed to rotate about the pin 80. In an exemplary embodiment, the pin 80 is press-fitted into the opening 78; however, any suitable method can be used to secure the pin 80.

[0029] The clamping rod 72 extends to a bullnose hook 82 with a convex circular outer surface 84. As the clamping rod 72 rotates about the pin 80, the hook 82 pivots within the cavity 34 toward and away from the top surface 20. As further described below, the hook 82 of the clamping rod 72 is operable to securely attach the surgical retractor to the impactor adapter 10.

[0030] The impactor adapter 10 also includes a leaf spring 86 or other compliant connecting member that connects the latch bar 44 and the clamping bar 72. The leaf spring 86 includes a flexible body 88 extending between ends 90, 92. End 90 is pivotally coupled to a pivot end 46 of the latch bar 44, and end 92 is pivotally coupled to the body 74 of the clamping bar 72. Exemplarily, each end 90, 92 includes a fork 94 extending to a pair of mounting plates 96. A circular opening 98 is defined through each mounting plate 96. The mounting plate 96 of the end 90 surrounds an aperture 100 defined through the pivot end 46 of the bar 44. A pin 102 is positioned in the opening 98 and the aperture 100 to pivotally couple the end 90 to the bar 44. Similarly, the mounting plate 96 of end 92 surrounds the orifice 104 defined through the clamping rod 72, and the pin 106 is positioned in the opening 98 and the orifice 104 to pivotally connect end 92 to the clamping rod 72.

[0031] When lever 44 is in the open position (in) Figures 1 to 2 When (as shown in the diagram), the leaf spring 86 has a relaxed arc shape. When the lever 44 moves to the latch position (in...), Figures 3 to 5When (as shown in the diagram), the leaf spring 86 has a relatively shortened and compressed shape, thus placing the leaf spring 86 in a compressed state. In the compressed state, the leaf spring 86 pushes the clamping rod 72 to pivot about the pin 80, thereby causing the hook 82 to rotate toward the top surface 20 of the body 12. The compression on the leaf spring 86 can be released by moving the rod 44 from the latched position to the open position, as further described below. As described above, the wing 62 extending from the rod body 60 assists the surgeon or other user in moving the rod 44 from the latched position to the open position.

[0032] like Figure 1 and Figure 3 As shown, each of the side surfaces 24, 26 has a waist 108 positioned between the cavity 34 and the impactor end 14. At the waist 108, the distance between the side surfaces 24, 26 increases toward the impactor end 14. Figure 3 As shown, in the closed position, the wing 62 is positioned between the waist 108 and the puller end 14 and extends beyond the side surface 24, thereby allowing the surgeon to grip the wing 62.

[0033] like Figures 1 to 5 As shown, an opening 110 is defined in the side surface 24 of the body 12, between the waist 108 of the body 12 and the impactor end 14. One or more inner walls 112 extend inwardly from the opening 110, thereby defining a cavity 114. An additional opening 116 is defined in the top surface 20. A channel 118 extends through the opening 116 into the cavity 114.

[0034] A push-button latch 120 (also referred to as push-button 120) is positioned within the cavity 114. As further described below, push-button latch 120 can be used to selectively retain the latch lever 44. Figures 3 to 5 The latching position is shown. The button latch 120 includes a button surface 122 positioned toward the side surface 24 of the body 12. The button surface 122 is configured to be pressed by a surgeon and therefore may be textured or otherwise configured to provide additional grip. Additionally, as... Figure 5 As shown, during normal operation, the button surface 122 may be flush with the side surface 24 and / or recessed into the cavity 114 to prevent accidental operation.

[0035] The button latch 120 also includes a pair of sidewalls 124 extending inwardly from the button surface 122 into the cavity 114. The sidewalls are connected by a rear wall 126. The button surface 122, sidewalls 124, and rear wall 126 together surround the button cavity 128. The latch 130 extends upwardly from the rear wall 126. The latch 130 includes an upper cam surface 132 and a lower surface 134 extending inwardly into the button cavity 128. A guide pin 136 extends from the rear surface 138 of the latch 130 toward the other side surface 26. A coil spring 140 is held between the body 12 and the rear surface 138 of the latch 130, and the guide pin 136 is captured within the spring 140. The spring 140 presses against the body 12 and the rear surface 138 to bias the button latch 120 toward an opening 110 in the side surface 24. A second stop pin 142, positioned in a hole defined through the bottom surface 22 of the body 12, extends into the latch cavity 114. When the button latch 120 is positioned in the cavity 114, the second stop pin 142 also extends into the button cavity 128. The second stop pin 142 engages the rear wall 126 of the button latch 120 and thus retains the button latch 120 within the cavity 114 of the body 12.

[0036] like Figure 5 As shown, when lever 44 is in the latched position, latch 66 extends into cavity 114 and button cavity 128. The upper surface 70 of latch 66 engages the lower surface 134 of latch 130, thereby holding latch 66 within button cavity 128. When a surgeon or other user presses button surface 162, button latch 120 slides toward side surface 26, and the lower surface 134 of latch 130 slides away from upper surface 70, thereby releasing latch 66. When latch 66 is released, leaf spring 86 causes the latched end 64 of lever 44 to swing toward the open position out of cavity 114, releasing compression of leaf spring 86.

[0037] When a surgeon or other user moves lever 44 from the open position to the latched position without depressing the button latch 120, the lower cam surface 68 of the latch 66 engages the upper cam surface 132 of the latch 130. This engagement of the cam surfaces 68 and 132 forces the button latch 120 to slide toward the side surface 26, thereby allowing the latch 66 to enter the button cavity 128. As the latch 66 passes the latch 120 and the cam surfaces 68 and 132 disengage, the spring 140 forces the button latch 120 to slide back toward the side surface 24, which causes the lower surface 134 of the latch 130 to hold the upper surface 70 of the latch 66. Therefore, the latch lever 44 can be operated with one hand.

[0038] like Figures 1 to 4 As shown, the impactor end 14 includes a handle 144 configured to be received by an automated surgical impactor. Figure 1 and Figure 3 As shown, the handle 144 extends away from the tool axis 18 at a non-zero angle. This non-zero angle improves the surgeon's ergonomics when used with an automated surgical impactor. The exemplary handle 144 includes a pin 146 and a flange 148. The handle 144 is configured to be impacted by the automated surgical impactor in a forward direction (i.e., advancing the impactor adapter 10 toward the patient's bone) or in the opposite direction (i.e., withdrawing the impactor adapter 10 from the patient's bone). In other embodiments, it should be understood that the handle 144 may include any other configuration of pin, flange, flat portion, and / or other features configured to be captured and / or impacted by the automated surgical impactor. The exemplary handle 144 also includes a groove 150 that marks the depth to which the handle 144 is fully positioned within the automated surgical impactor.

[0039] Can be executed and Figures 6 to 10 The type of orthopedic surgery illustrated utilizes an impactor adapter 10. First, the surgeon prepares the patient's bone surgically to receive a surgical retractor. For this purpose, the surgeon or other members of the surgical team may remove the patient's femur to remove the natural femoral head and create a substantially flat proximal surface on the patient's femur. The surgeon may use a bone chisel to create an opening in the femoral canal.

[0040] After preparing the patient's bones, and as Figures 6 to 7 As shown, the surgeon attaches the femoral retractor 152 to the impactor adapter 10. The surgeon can select a retractor 152 from a set of retractors 152, each of different sizes. As further described below, the surgeon can sequentially retract the patient's femur using a series of enlarged retractors 152.

[0041] An exemplary femoral retractor 152 includes an elongated body 154 extending from a proximal end 156 to a distal tip 158. In an exemplary embodiment, the femoral retractor 152 is formed as a single, integral component from a metallic material such as stainless steel. A tapered outer surface 160 extends from the proximal end 156 to the distal tip 158 and, in some embodiments, is covered with a plurality of cutting teeth 162. The shape and size of each tooth 162 may be configured to surgically prepare the femoral canal of a patient's femur to receive femoral components and / or another surgical instrument (e.g., another femoral retractor and / or a femoral experimental component).

[0042] The femoral retractor 152 includes a flat proximal surface 164 located at the proximal end 156 of the elongated body 154. (As...) Figure 7As shown, a slot 166 is defined in a proximal surface 164, sized to receive a guide pin 42 extending from the puller end 16 of the impactor adapter 10. The puller 152 also includes a proximal mounting post 168 extending outward from the surface 164 to the tip 170. The post 168 further defines a bevel 172 positioned on the tip 170. The inner wall 174 defines a recess 176 for securing the femoral puller 152 to the impactor adapter 10, as discussed further below.

[0043] like Figure 6 As shown, the lever 44 of the impactor adapter 10 is initially in the open position. The surgeon or other user attaches the proximal end 156 of the femoral retractor 152 to the retractor end 16 of the impactor adapter 10. As... Figure 7 As shown, when the puller 152 and the impactor adapter 10 are attached, the mounting post 168 of the puller 152 passes through the opening 38 of the impactor adapter 10 into the channel 40, and the guide pin 42 of the impactor adapter 10 passes through the slot 166 of the puller 152. As the mounting post 168 enters the channel 40, depending on the position of the clamping rod 72, the mounting post 168 may contact the rounded hook 82 of the clamping rod 72. If so, the bevel 172 on the tip 170 of the mounting post 168 engages the convex outer surface 84 of the hook 82. When the bevel 172 and the outer surface 84 engage, the hook 82 is pushed away from the channel 40 and rotated downwards, thereby allowing the mounting post 168 to continue into the channel. When the puller 152 is fully inserted into the impactor adapter 10, the proximal surface 164 of the puller 152 contacts the flat surface 36 of the impactor adapter. When fully inserted, the notch 176 in the mounting post 168 faces the round hook 82 of the clamping rod 72.

[0044] After securing the femoral retractor 152 to the impactor adapter 10, the surgeon moves the latch lever 44 from the open position to the latched position, as follows: Figures 8 to 9As shown. When the latch lever 44 moves to the latched position, the leaf spring 86 is compressed. When the leaf spring 86 is compressed, it applies a force to the clamping lever 72, causing the hook 82 of the clamping lever 72 to pivot toward the mounting post 168. The clamping lever 72 pivots until the outer surface 84 of the hook 82 engages with the inner wall 174 within the recess 176. When engaged, the leaf spring 86 and the clamping lever 72 apply a clamping force to the mounting post 168, which holds the femoral retractor 152 on the surface 36 of the impactor adapter 10. The femoral retractor 152 thus remains rigid and stationary relative to the implant adapter 10. As described above, when the latch lever 44 is in the latched position, the push-button latch 120 holds the latch 66, thereby ensuring that the latch lever 44 remains in the latched position and the femoral retractor 152 remains rigidly attached to the impactor adapter 10. Furthermore, since the latch lever 44 is held by the push-button latch 120, the leaf spring 86 does not extend beyond the center position to retain the latch lever 44. Therefore, compared to impact tools using the over-center clamping function, the impactor adapter 10 can have reduced wear and increased lifespan.

[0045] After latching the shock adapter 10, the surgeon attaches the shock adapter end 14 of the shock adapter 10 to the automated surgical shock device 178, as follows. Figure 10 As shown. Alternatively, in some embodiments, the impactor adapter 10 may be attached to the automated surgical impactor 178 prior to attachment to the femoral retractor 152.

[0046] The automated surgical impactor 178 can be embodied as a Kincise commercially available from DePuy Synthes (Warsaw, Indiana). ™ Surgical automation system components. In an exemplary embodiment, the automated surgical impactor 178 includes an impactor body 180 having a torsion lock collar 182 and a battery pack 184. An electrical drive component 186 is housed within the impactor body 180. The impactor body 180 also includes a main handle 188, a secondary handle 190, and a trigger 192.

[0047] In use, the surgeon inserts the handle 144 of the impactor adapter 10 into the twist-lock collar 182 and then locks the collar 182 onto the handle 144. Holding the main handle 188 and / or the secondary handle 190, the surgeon inserts the femoral retractor 152 into the surgically prepared femur 194 of the patient, as... Figure 10As shown. After positioning the femoral retractor 152, the surgeon depresses trigger 192, which causes the electrical drive unit 186 to generate a series of controlled percussive impacts on the impactor adapter 10 using electrical energy supplied by the battery pack 184. The impactor adapter 10 transmits the impact force from the percussive impacts to the femoral retractor 152, thereby driving the femoral retractor 152 into the medullary duct of the patient's femur 194. During impact, the surgeon's hand can remain on the automated surgical impactor 178, and the latch lever 44 remains in the latched position. In addition, the leaf spring 86 rigidly holds the femoral retractor 152 on the impactor adapter 10 during impact. Unlike adapters that use typical rigid drive attachment mechanisms, the compliant flexible leaf spring 86 of the impactor adapter 10 does not disengage or otherwise release during impact, even when subjected to frequent low-amplitude impacts generated by the automated surgical impactor 178.

[0048] After the femoral retractor 152 has been retracted to the desired depth or otherwise fully impacted into the patient's femur 194, the surgeon may remove the femoral retractor 152 from the femur 194. For example, the surgeon may remove the femoral retractor 152 to continue retracting the femur 194 using successive larger retractors 152. Alternatively or concurrently, the surgeon may remove the femoral retractor 152 to insert a prosthesis component, experimental component, or other femoral component into the femur 194. To remove the femoral retractor 152, the surgeon operates the trigger 192 in a reverse mode, which generates a series of controlled percussive impacts in the reverse direction on the impactor adapter 10, causing the retractor 152 to withdraw from the femur 194.

[0049] After removing the puller 152 from the femur 194, the surgeon removes the impactor adapter 10 from the femoral puller 152. To do this, the surgeon presses down the button surface 122 of the button latch 120, causing the button latch 120 to slide into the cavity 114 in the body 12. As the button latch 120 slides into the cavity 114, the lower surface 134 disengages from the upper surface 70 of the latch 66, releasing the latch end 64 of the latch lever 44. With the latch 66 released, the leaf spring 86 can push the latch lever 44 to swing toward the open position. The surgeon can manually open the latch lever 44 as needed, for example, using the wing 62 as a gripping surface. As described above, in the fully open position, the latch lever 44 is limited to an angle of approximately 40 degrees. This limited opening angle may have a lower risk of jamming, tearing, or otherwise interfering with the patient's tissues. After the latch lever 44 is moved to the open position, the clamping lever 72 is released from the mounting post 168, and the puller 152 can be removed from the impactor adapter 10. After the puller 152 is removed, another femoral puller 152 (e.g., a larger femoral puller) can be attached to the impactor adapter 10, as described above.

[0050] Although the femoral retractor 152 is described as being removed from the femur 194 prior to removal from the impactor adapter 10, it should be understood that in some embodiments, the impactor adapter 10 may be removed from the retractor 152 while the retractor 152 remains positioned within the femur 194. For example, in some embodiments, the final, maximum retractor 152 used by the surgeon may remain in the femur 194 for use as a femoral experimental component.

[0051] As described above, the elongated body 12 of the impactor adapter 10 has a generally linear shape defining a longitudinal tool axis 18. This linear shape of the impactor adapter 10 can be selected by surgeons performing hip replacement surgery using the direct anterior approach (DAA) surgical technique. Impactor adapters with other shapes can be used for other surgical methods.

[0052] Now for reference Figures 11 to 15 Exemplary embodiments of the curved tractor impactor adapter 200 can be used in posterior approach surgical techniques and / or anterolateral approach surgical techniques for performing hip replacement surgery. The exemplary curved tractor impactor adapter 200 shares components similar to those of the straight tractor adapter 10. Those similar components are... Figures 11 to 15 China and Israel Figures 1 to 5 The same reference numerals are shown in the accompanying drawings, and the descriptions of those components are not repeated here so as not to obscure this disclosure.

[0053] and Figures 1 to 5 The impactor adapter 10 shown is different. Figures 11 to 15 The illustrated curved adapter 200 includes an elongated body 12 having a straight segment 202 and a curved segment 204. The straight segment 202 extends coherently with the tool axis 18. The curved segment 204 defines a broach axis 206 extending outwardly from the broach end 16. A non-zero angle is defined between the tool axis 18 and the broach axis 206. As an additional difference from the impactor adapter 10, the shank 144 of the curved adapter 202 extends coherently with the tool axis 18.

[0054] Can be executed as Figures 16 to 20 The bending adapter 200 is used during the plastic surgery procedure shown. Figures 16 to 20 The procedure shown is similar to Figures 6 to 10 The procedure is shown and described above. As mentioned above, firstly, the surgeon prepares the patient's bones to receive a surgical scalpel. Figures 16 to 17 As shown, a surgeon or other user attaches the femoral retractor 152 to the retractor end 16 of the curved adapter 200. Figures 18 to 19As shown, once the femoral retractor 152 is attached, the surgeon or other user moves the latch lever 44 from the open position to the latched position, in which the femoral retractor 152 is rigidly held on the surface 36 of the curved adapter 200. Figure 20 As shown, the surgeon attaches the impactor end 14 of the curved adapter 200 to the automated surgical impactor 178, and then uses the automated surgical impactor 178 to impact the retractor 152 into the patient's femur 194. As described above, the surgeon can use a posterior approach or an anterolateral approach to impact the retractor 152. After completing the retraction, the surgeon can remove the retractor 152 from the curved adapter 200, for example, to continue retraction using successive larger retractors 152, or to implant a femoral component or other prosthetic component.

[0055] Although the present disclosure has been illustrated and described in detail in the accompanying drawings and the foregoing description, such illustrations and descriptions should be regarded as exemplary rather than limiting in nature. It should be understood that only exemplary embodiments have been shown and described, and all changes and modifications made within the substance of the present disclosure should be protected.

[0056] The methods, apparatus, and systems described herein possess numerous advantages due to their various features. It should be noted that alternative embodiments of the methods, apparatus, and systems of this disclosure may exclude all described features, but may still benefit from at least some of the advantages of such features. Those skilled in the art will readily conceive of their own implementations of the methods, apparatus, and systems described above, which may incorporate one or more features of the invention and fall within the spirit and scope of this disclosure as defined by the appended claims.

Claims

1. A plastic surgery instrument for use with a surgical retractor, the plastic surgery instrument comprising: An elongated body extending from a first end to a second end, wherein the first end is configured to be received by an automated surgical impactor; A first rod extends from a pivot end to a latch end, wherein the pivot end is pivotally connected to the elongated body; A second rod, pivotally connected to the elongated body, includes a hook extending toward the top surface of the elongated body; A leaf spring having a first end pivotally connected to a first rod and a second end pivotally connected to a second rod, such that movement of the first rod causes movement of the second rod, wherein the leaf spring includes a flexible body extending between the first end and the second end of the leaf spring; A first stop pin is connected to the elongated body; and A button latch is attached to the elongated body, wherein the button latch includes a button surface positioned toward a first sidewall of the elongated body; The first rod is pivotally connected to the elongated body at a first pivot point defined on the first rod, and the leaf spring is pivotally connected to the first rod at a second pivot point defined on the first rod, wherein the second pivot point is located between the first pivot point and the pivot end of the first rod; The first lever is movable between a first position and a second position. In the first position, the latch end is spaced apart from the elongated body. In the second position, the latch end is captured by the button latch. When the first lever is in the second position, the compressed leaf spring pushes the second lever to pivot the hook toward the top surface. When the first lever is in the second position, the force applied by the leaf spring pushes the first lever to pivot about the first pivot point. The latch end of the first lever is pushed against the button latch toward the first position. When the first rod is in the first position, the bottom surface of the pivot end of the first rod contacts the first stop pin; and The button latch is movable between a first position and a second position, wherein in the first position the button latch engages the latch end of the first rod, and in the second position the button latch does not engage the latch end, wherein when the button latch moves from the first position to the second position, the button surface moves within the elongated body in a direction transverse to the longitudinal tool axis defined by the elongated body.

2. The orthopedic surgical instrument of claim 1, wherein the elongated body includes a curved section located between the pivot end of the first rod and the second end of the elongated body.

3. The orthopedic surgical instrument according to claim 1, wherein: The elongated body includes: (i) a top surface having an elongated opening defined therein; (ii) a bottom surface opposite to the top surface and having an elongated opening defined therein; (iii) one or more inner walls extending between the elongated opening defined in the top surface and the elongated opening defined in the bottom surface; and (iv) a first cavity defined by the one or more inner walls. The second rod is positioned within the first cavity; the first rod The pivoting end of the first rod is pivotally connected to the elongated body within the first cavity, and the latching end of the first rod extends out of the first cavity through the elongated opening defined in the top surface; and The leaf spring is located within the first cavity.

4. The orthopedic surgical instrument according to claim 3, wherein: The elongated body includes a flat front surface positioned at the second end of the elongated body; and A circular opening is defined in the flat front surface, wherein the circular opening leads to the first cavity.

5. The orthopedic surgical instrument according to claim 4, wherein: The circular opening defines a channel for entry into the first cavity, and the channel is sized to receive the mounting post of the surgical retractor. and When the first rod is in the second position, the hook of the second rod is positioned in the channel.

6. The orthopedic surgical instrument of claim 5, wherein the guide pin extends outward from the flat front surface of the elongated body, wherein the guide pin is positioned between the circular opening and the bottom surface.

7. The orthopedic surgical instrument according to claim 3, wherein the first stop pin is positioned within the first cavity.

8. The orthopedic surgical instrument according to claim 3, wherein: The elongated body includes: (i) a first sidewall and a second sidewall opposite to the first sidewall; (ii) an opening defined in the first sidewall; (iii) one or more inner walls extending inwardly from the opening in the first sidewall, wherein the one or more inner walls define a second cavity; and (iv) a second opening defined in the top surface between the first end and the elongated opening, wherein the second opening leads to the second cavity; The button latch is positioned in the second cavity; and When the first lever is in the second position, the latch extending downward from the latch end is locked in the second cavity and held by the button latch.

9. The orthopedic surgical instrument according to claim 8, wherein in the first position of the button latch, the button latch engages with the latch positioned in the second cavity.

10. The orthopedic surgical instrument of claim 9, further comprising a second spring positioned in the second cavity, wherein the second spring is configured to bias the button catch in a first position of the button catch.

11. The orthopedic surgical instrument according to claim 10, wherein the button latch comprises: A button surface, the button surface being positioned toward the first sidewall of the elongated body; A pair of sidewalls extending from the button surface into the second cavity; A rear wall, which connects to the pair of side walls; and a snap fastener, which extends from the rear wall into the second cavity.

12. The orthopedic instrument of claim 11, wherein the latch of the first lever includes a first cam surface, wherein the latch of the button latch includes a second cam surface, wherein the first cam surface engages the second cam surface when the first lever moves from a first position to a second position, and wherein the button latch is pushed from the first position to the second position when the first cam surface engages the second cam surface.

13. A surgical instrument assembly, the surgical instrument assembly comprising: Orthopedic surgical instruments according to any one of claims 1 to 12; and A surgical retractor, the surgical retractor being coupled to a second end of the orthopedic surgical instrument, the surgical retractor including a mounting post extending from a first end of the surgical retractor; When the first rod is in the second position, the leaf spring pushes the second rod to cause the hook pivot to engage with the mounting post of the surgical retractor.

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