SYSTEMS AND METHODS FOR LEG STABILIZATION DURING KNEE ARTHROPLASTY SURGERY

Abstract

Systems and methods include stabilizing a leg and providing femoral distraction during a knee arthroplasty surgery. The disclosed systems include a leg holder to receive a foot of a patient and a femoral distractor received in the leg holder and disposed underneath a knee of the patient. The femoral distractor is actuated to increase or decrease in length to distract the femur such that a surgeon may cut to resection the femur without also simultaneously providing distraction of the femur.

Claims

1. A leg stabilization device for fixating a leg during knee arthroplasty surgery, the device comprising: a floor stand including: a base; a first column extending upwardly from the base; a stand arm movably coupled to the first column and adapted to be positioned on a posterior side of a knee of a patient; and a boot configured to be adjustably fixed to an operating table.

2. The device of claim 1, further comprising an intermediate arm adjustably coupled between the stand arm and the first column.

3. The device of claim 1, further comprising a second column telescopically coupled to the first column and configured to be vertically adjustable relative to the first column.

4. The device of claim 1, further comprising: an intermediate arm adjustably coupled between the stand arm and the first column; and a second column telescopically coupled to the first column and configured to be vertically adjustable relative to the first column.

5. The device of claim 2, wherein the stand arm is pivotally coupled to the intermediate arm.

6. The device of claim 1, further comprising: a rail mounted to the operating table; and a leg holder including: a boot carriage configured to be slidably coupled to the rail; and the boot attached to the boot carriage.

7. The device of claim 6, wherein the boot includes a ball end adapted to be received in the boot carriage.

8. A leg stabilization device for fixating a leg during knee arthroplasty surgery, the device comprising: a floor stand including: a base; a first column extending upwardly from the base; a second column extending upwardly from and telescopically coupled to the first column and configured to be vertically adjustable relative to the first column; a stand arm movably coupled to the second column and adapted to be positioned on a posterior side of a knee of a patient; and a boot configured to be adjustably fixed to an operating table.

9. The device of claim 8, further comprising an intermediate arm adjustably coupled between the stand arm and the second column.

10. The device of claim 8, wherein the stand arm is pivotally coupled to the intermediate arm.

11. The device of claim 10, wherein the intermediate arm is pivotally coupled to the second column.

12. The device of claim 8, further comprising: a rail mounted to the operating table; and a leg holder including: a boot carriage configured to be slidably coupled to the rail; and the boot attached to the boot carriage.

13. The device of claim 12, wherein the boot includes a ball end adapted to be received in the boot carriage.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0008] FIG. 1 illustrates a conventional leg holder.

[0009] FIG. 2 illustrates an exemplary embodiment of an auxiliary leg stabilization device consistent with the principles of the present disclosure.

[0010] FIG. 3 illustrates a rail of an exemplary embodiment of an auxiliary leg stabilization device consistent with the principles of the present disclosure.

[0011] FIG. 4 illustrates a rail and carriages of an exemplary embodiment of an auxiliary leg stabilization device consistent with the principles of the present disclosure.

[0012] FIG. 5 illustrates a foot being secured to portions of an exemplary embodiment of an auxiliary leg stabilization device consistent with the principles of the present disclosure.

[0013] FIG. 6 illustrates an exemplary embodiment of an auxiliary leg stabilization device consistent with the principles of the present disclosure.

[0014] FIG. 7 illustrates an exemplary embodiment of an auxiliary leg stabilization device consistent with the principles of the present disclosure.

[0015] FIG. 8 illustrates an exemplary embodiment of an auxiliary leg stabilization device consistent with the principles of the present disclosure.

[0016] FIG. 9 illustrates an exemplary embodiment of an auxiliary leg stabilization device consistent with the principles of the present disclosure.

[0017] Corresponding reference characters indicate corresponding parts throughout the drawings.

DETAILED DESCRIPTION OF THE DISCLOSURE

[0018] Various different systems and methods for providing auxiliary leg stabilization to carry out and perform knee arthroplasty are disclosed here.

[0019] FIG. 1 illustrates a conventional leg holder which includes a bed mounted rail that attaches to a boot. A patient's foot rests in the boot as the surgery is conducted. While in this case, the tibia is stabilized, the femur is not and may move during the surgery. This may be problematic during resection and distraction of the femur. FIG. 1 also shows navigation arrays attached to femur and tibia to facilitate navigation of the tool during robot assisted surgery.

[0020] Consistent with the principles of the current disclosure, and as illustrated in FIG. 2, a leg holder 200 may include a femoral distractor 202 that attaches to a bed mounted rail 204 that also supports a boot 206. Femoral distractor 202 may be actuated via a hand pumped ratchet 208 and other actuations methods are also feasible. Femoral distractor may contain a spring 209 that is manipulated by actuator 208 to extend the length of femoral distractor 202. Femoral distractor may also have a release mechanism 211 to release tension of spring 209 and return femoral distractor 202 to a default length. A ball end 210 of femoral distractor 202 is placed in a carriage 212 that is secured to rail 204. A pillow block end 214 is placed under the posterior femur. In operation, the patient's foot is placed in boot 206 and femoral distractor 202 is actuated by ratchet 208 to distract the femur. The surgeon may then resection the femur according to the surgical plan.

[0021] The femoral distractor of the present disclosure achieves objectives that are not supported by a conventional leg holder. This includes but is not limited to supporting the femur during resection, providing for the ability to distract the femur, and providing an attachment point for retractors to facilitate hands free retraction. As shown in FIGS. 8 and 9, femoral distractor 202 may serve as an attachment point for retractors 802. This allows hands free retraction to perform the femoral resection.

[0022] In an exemplary embodiment, the resection process and exemplary auxiliary leg stabilization device may be described as follows. Rail 204 may be placed on a bed or table 302 as shown in FIG. 3. Carriages 212 may be installed on rail 204 as shown in FIG. 4. Carriages may include a receiving hole 402 configured to receive boot 206 and a receiving hole 404 configured to receive ball end 210 of femoral distractor 202. A patient's foot may be placed in boot 206 and secured to rail 204 as shown in FIG. 5. At this point the surgeon makes an incision in the knee to facilitate the knee arthroplasty surgery. Femoral distractor 202 is placed in bed rail 204 and the femur is distracted as previously shown in FIG. 2. Retractors are placed and coupled to femoral distractor 202 so that the femoral resection can be performed by the surgeon.

[0023] As an alternative system and method of leg stabilization, the leg may be coupled to a floor mounted stand 602 as shown in FIG. 6. Here, the leg may be fixated as follows. Stand 602 is positioned contralaterally to the leg. The leg is placed in flexion and the tibia secured in a bed mounted leg holder 604. A stand arm 606 is placed on the posterior femur and the femur is secured to the stand as shown in FIG. 7. At this point, a stand column 608 can be raised to provide femoral distraction for the resection process as noted above.

[0024] As various changes could be made in the above constructions, products, and methods without departing from the scope of the disclosure, it is intended that all matter contained in the above description and shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.