CN119233799A - Mount for holding a reference frame during a surgical procedure - Google Patents

Abstract

A mounting member for holding a reference frame during a surgical procedure. The mounting member includes a reference frame connector located at a first end of the mounting member. A handle connector is located at a second end of the mounting member. The handle connector is configured to receive a head of a handle within the handle connector. The handle connector includes a set screw that is movable to contact the head to lock the handle connector to the head of the handle. A support rod extends between the reference frame connector and the handle connector.

Description

Mount for holding a reference frame during a surgical procedure

Cross Reference to Related Applications

The present application claims the benefit of U.S. provisional application No. 63/342,325, filed 5/16 at 2022. The entire disclosures of the above applications are incorporated herein by reference.

Technical Field

The present disclosure relates to a mount for holding a reference frame during a surgical procedure.

Background

This section provides background information related to the present disclosure, which is not necessarily prior art.

When applied to pediatric patients with deformities, such as scoliosis, it is often the case that the pedicles of the vertebral bodies are small, non-existent, or poor in bone quality. Such patients are often treated using surgical navigation techniques that rely on placement of the reference frame in the surgical field by mounting the reference frame to the pedicle with a clamp. If the surgeon is not able to use the spinal jig due to insufficient bone structure, the frame of reference must be attached in a different manner. The present disclosure advantageously includes a mount for holding a reference frame during surgery that addresses various needs in the art as explained herein and as will be appreciated by those of skill in the art.

Disclosure of Invention

This section provides a general summary of the disclosure, and is not a comprehensive disclosure of its full scope or all of its features.

The present disclosure provides a mount for holding a reference frame during a surgical procedure. The mount includes a reference frame connector at a first end of the mount. The handle connector is located at the second end of the mount. The handle connector is configured to receive a head of the handle within the handle connector. The handle connector includes a set screw movable to contact the head to lock the handle connector to the head of the handle. The support bar extends between the reference frame connector and the handle connector.

The present disclosure further provides a mount for holding a reference frame during a surgical procedure. The mount includes a reference frame connector at a first end of the mount. The handle connector is located at the second end of the mount. The handle connector has a body defining a receptacle, a distal opening, and a side window adjacent the distal opening configured to receive a head of a handle. The support bar extends between the reference frame connector and the handle connector.

The present disclosure also provides a method for performing a navigated surgical procedure. The method includes securing a handle to a bone, connecting a mount holding a reference frame to the handle by sliding a handle connector of the mount onto a head of the handle such that the head passes through a side window defined by a body of the handle connector into a receptacle defined by the body, tightening a set screw of the handle connector such that the set screw contacts the head of the handle to apply pressure to the head and secure the head within the receptacle, using the reference frame during a navigational surgical procedure, removing the mount from the handle after use of the reference frame has ended, and attaching a bracket to the handle after the mount has been removed from the handle, the bracket configured to couple with an implant.

Further areas of applicability will become apparent from the description provided herein. The description and specific examples in this summary are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure.

Drawings

The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present disclosure.

FIG. 1 is a perspective view of a mount for holding a frame of reference during a surgical procedure according to the present disclosure;

FIG. 2 is another perspective view of the mount of FIG. 1;

FIG. 3 is an exploded view of the mount of FIG. 1;

FIG. 4 is a cross-sectional view of the shank connector of the mount of FIG. 1;

FIG. 5 is a perspective view of an alternative set screw for mating with the shank connector of the mount of FIG. 1;

FIG. 6 is a perspective view of an exemplary handle with which the handle connector of the mount of FIG. 1 is configured to mate;

FIG. 7 is a perspective view of a stem connector of a stem engaged with bone and a mount engaged with a head of the stem;

FIG. 8 is a perspective view of a mount having a reference frame mounted thereto, the mount being connected to a stem that mates with the bone of the spinal column;

FIG. 9 shows a handle with a bracket disposed thereon and a fastener configured to mate with the bracket, and

Fig. 10 is a plan view of the spine and a pair of support rods and cross connectors mounted thereto with a plurality of shanks and brackets.

Corresponding reference characters indicate corresponding parts throughout the several views of the drawings.

Detailed Description

Exemplary embodiments will now be described more fully with reference to the accompanying drawings.

Referring initially to fig. 1-3, a mount 10 according to the present disclosure is shown. The mount 10 is configured to mount any suitable frame of reference relative to the anatomy during a surgical procedure using surgical navigation techniques. Fig. 8 illustrates an exemplary reference frame 210. The mount 10 may also be used to mount any other suitable frame of reference or other tracking device. For example, the mount 10 may be used with any of the surgical navigation devices and systems described in U.S. patent nos. RE44,305, 7,697,972, 8,644,907, and 8,842,893, and U.S. patent application publication No. 2004/0199072, each of which is incorporated by reference herein in its entirety.

The mount 10 generally includes a reference frame connector 12, a handle connector 14, and a support rod 16 extending between the reference frame connector 12 and the handle connector 14. The support bar 16 may have any suitable shape to support the frame of reference 210 at a desired position relative to the anatomy to which the handle connector 14 and mount 10 are mounted.

The reference frame connector 12 may have any suitable configuration for connecting the mount 10 to the reference frame 210 or any other suitable reference frame or tracking device. In the example shown, the reference frame connector 12 includes a knob 20 having a shaft 22 extending therefrom. The shaft 22 includes a plurality of threads 24 configured to mate with threads of a reference frame 210 or associated bracket. The plurality of teeth 26 are configured to mate with corresponding teeth of the reference frame 210 (or associated brackets) to allow the reference frame 210 to be supported at various different rotational positions relative to the reference frame connector 12. Referring specifically to fig. 3, the reference frame connector 12 includes a housing 28 defining a first aperture 30 and a second aperture 32. The shaft 22 extends through the first aperture 30 such that the knob 20 and threads 24 are located on opposite sides of the housing 28. Disposed on the shaft 22 are a first washer 34 and a second washer 36. The support bar 16 is secured within the second aperture 32. Alternatively, the support bar 16 and the housing 28 may be integral, such as in the form of a single unitary structure.

In the illustrated example, the support bar 16 includes a first portion 40, a second portion 42, and an elbow 44 between the first portion 40 and the second portion 42. The first portion 40 extends from the housing 28 of the reference frame connector 12. The second portion 42 extends from the handle connector 14, as described in further detail herein. The elbow 44 may be curved or angled to arrange the first portion 40 and the second portion 42 at any suitable angle relative to each other. The elbow 44 is optional and thus in some applications the support bar 16 may be linear.

With continued reference to fig. 1-3 and with additional reference to fig. 4, the handle connector 14 will now be described in more detail. The handle connector 14 includes a body 50 having a proximal end 52 and a distal end 54 opposite the proximal end 52. The longitudinal axis a extends through the body 50 and through the center of the proximal end 52 and the center of the distal end 54.

At the distal end 54 is a distal opening 60. The distal opening 60 provides access to a receptacle 62 defined by the body 50. Distal opening 60 is defined by a flange 64 that is generally c-shaped and extends around less than the entire distal opening 60. The body 50 also defines a window 66 located at a side of the body 50 adjacent the flange 64 and the distal opening 60. The window 66 provides access to the receptacle 62 from a direction perpendicular to the longitudinal axis a. At window 66 is a recess 68 adjacent flange 64.

The body 50 further defines a pin bore 70. The pin bore 70 extends perpendicular to and is offset from the longitudinal axis a of the body 50. The pin bore 70 is configured to receive a pin 72 (see fig. 3) for retaining a set screw 90 within the body 50, as further described herein.

Adjacent to the body 50 is a side body 80 of the handle connector 14. The side body 80 extends along a longitudinal axis B that is parallel to the longitudinal axis a of the body 50. The side body 80 is engaged with the support bar 16 in any suitable manner. For example, the side body 80 may define a receptacle that receives the second portion 42 of the support rod 16. Alternatively, the second portion 42 may be integral with and integral with the side body 80.

Set screw 90 includes a head 92 and a base end 94 opposite head 92. Distal threads 96 are adjacent head 92 and proximal threads 98 are adjacent base end 94. Between the distal threads 96 and the proximal threads 98 is an unthreaded outer surface 110. Set screw 90 is retained within body 50 by pin 72 which seats against an outer surface 110 between distal threads 96 and proximal threads 98 when set screw 90 is seated within body 50. Set screw 90 may be threaded into body 50 until pin 72 contacts proximal threads 98, and set screw 90 may be rotated in the opposite direction to move head 92 away from distal end 54 until the pin contacts distal threads 96.

Distal threads 96 and proximal threads 98 mate with internal threads of body 50. Thus, rotation of the set screw 90 in the first direction moves the set screw 90 along the longitudinal axis a toward the distal end 54 of the body 50. Rotation of set screw 90 in the opposite direction moves set screw 90 along longitudinal axis a toward proximal end 52 of body 50. The base end 94 may include a plurality of flat surfaces to facilitate engagement between the base end 94 and any suitable tool for rotating the set screw 90. The flat surface may also facilitate manual rotation of set screw 90.

Fig. 5 shows another set screw according to the present disclosure at reference numeral 90'. Set screw 90 'is similar to set screw 90, so similar features are identified in fig. 5 using the same reference numerals, but also including an angular symbol ('). The description of set screw 90 also applies to set screw 90 'except that head 92' is flat, as opposed to rounded head 92.

Fig. 6 illustrates an exemplary shank (or screw) 120 configured to mate with the shank connector 14. The shank 120 may be any shank, screw or fastener suitable for attachment to bone. In the illustrated example, the handle 120 includes a head 122 and a tip 124. Between the head 122 and the tip 124 are a plurality of threads 126. The head 122 defines a receptacle 128 for mating with a fastener, as further explained herein. The head 122 is configured to mate with the body 50 of the handle connector 14 in any suitable manner.

Fig. 7 shows the stem 120 screwed into bone 150. Bone 150 may be any suitable bone of a patient, such as a vertebral body of a spinal column 152. The mount 10 is connected to the handle 120 by coupling the handle connector 14 to the head 122 of the handle 120. Specifically, after the stem 120 is secured to the bone 150, the body 50 of the stem connector 14 is slid over the head 122 in a direction perpendicular to the longitudinal axis a of the body 50 such that the head 122 enters the receptacle 62 through the side window 66. The window 66 allows the body 50 to slide laterally onto the head 122 of the handle 120, which advantageously gives the surgeon more room to work along the midline of the spine 152. The flange 64 is disposed on the underside of the head 122 to limit movement of the body 50 vertically away from the head 122. With the head 122 seated in the receptacle 62, the set screw 90/90' is rotated and tightened to move the head 92 (or the head 92' into engagement with the head 122 of the handle 120 when the set screw 90' is used), which further enhances engagement between the handle connector 14 and the handle 120.

Fig. 8 shows a mount 10 for supporting a reference frame 210 during a spinal procedure. The mount 10 is connected to a handle 120 that has been inserted into a bone 150 (such as a vertebral body) of a spinal column 152. The mount 10 may be oriented in any suitable position to optimally arrange the frame of reference 210 for the navigation procedure.

Once the reference frame 210 is no longer needed, the mount 10 is disconnected from the handle 120. With additional reference to fig. 9 and 10, a bracket 160 (such as a tulip head bracket) is connected to the head 122 of the handle 120 by sliding the bracket 160 laterally onto the head 122. Fig. 10 shows a plurality of handles 120 secured to different bones of a spine 152. Each of the handles 120 has a tulip head holder 160 attached thereto. The tulip head holder 160 is configured to receive the alignment/stiffening rod 180 within its U-shaped portion 162. The rod 180 is secured in place by screwing the fastener 170 onto the rod 180. Fastener 170 includes a head 172 and threads 174. The threads 174 are configured to mate with the internal threads of the tulip head holder 160 to lock the rod 180 in place. As shown in fig. 10, connectors 182 may be coupled to and extend between adjacent bars 180 to further enhance assembly.

The mount 10 is suitable for any relevant surgical procedure, such as, but not limited to, pediatric patients suffering from scoliosis or other spinal problems. The mount 10 is particularly configured for patients with sinus node degeneration or loss. The mount 10 is equally applicable to an initial procedure or a revision surgical procedure.

The foregoing description of the embodiments has been presented for purposes of illustration and description. The foregoing description is not intended to be exhaustive or to limit the disclosure. Individual elements or features of a particular embodiment are generally not limited to that particular embodiment, but, where applicable, are interchangeable and can also be used in selected embodiments, even if not specifically shown or described. The same element or feature may be varied in many ways. Such variations are not to be regarded as a departure from the disclosure, and all such modifications are intended to be included within the scope of the disclosure.

The exemplary embodiments are provided so that this disclosure will be thorough, and will fully convey the scope of the disclosure to those skilled in the art. Numerous specific details are set forth, such as examples of specific components, devices, and methods, in order to provide a thorough understanding of embodiments of the present disclosure. It will be apparent to one skilled in the art that the exemplary embodiments may be embodied in many different forms without the use of specific details and should not be construed as limiting the scope of the disclosure. In some exemplary embodiments, well known processes, well known device structures, and well known techniques have not been described in detail.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," and "having" are inclusive and therefore specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein should not be construed as necessarily requiring their performance in the particular order discussed or illustrated, unless specifically identified as an order of performance. It should also be appreciated that additional or alternative steps may be employed.

When an element or layer is referred to as being "on," "engaged to" or "connected to" or "coupled to" another element or layer, it can be directly on, engaged, connected or coupled to the other element or layer or intervening elements or layers may be present. In contrast, when an element is referred to as being "directly on," "directly engaged to," "directly connected to," or "directly coupled to" another element or layer, there may be no intervening elements or layers present. Other words used to describe the relationship between elements (e.g., "between" and "directly between", "adjacent" and "directly adjacent", etc.) should be interpreted in a similar manner. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may only be used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

Spatially relative terms, such as "inner," "outer," "lower," "upper," and the like, may be used herein for ease of description to describe one element or feature's relationship to another element or feature's illustrated in the figures. Spatially relative terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the example term "below" may encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Claims (20)

1. A mount for holding a frame of reference during a surgical procedure, the mount comprising:

A reference frame connector located at a first end of the mount;

A handle connector at the second end of the mount, the handle connector configured to receive a head of a handle within the handle connector, the handle connector including a set screw movable to contact the head to lock the handle connector to the head of the handle, and

A support rod extending between the reference frame connector and the handle connector.

2. The mount of claim 1, wherein the reference frame connector comprises a knob, a threaded shaft extending from the knob, and a plurality of teeth extending about the threaded shaft.

3. The mount of claim 1, wherein the support bar comprises a first portion extending from the reference frame connector, a second portion extending from the handle connector, and an elbow portion between the first portion and the second portion.

4. A mount according to claim 3, wherein the first portion is angled relative to the second portion.

5. The mount of claim 1, wherein the handle connector comprises a body having a proximal end and a distal end, the body defining a distal opening at the distal end, the set screw extending through the proximal end into the body.

6. The mount of claim 5, wherein the body further defines a side window adjacent the distal end, at which is a recess adjacent a flange at the distal end.

7. The mount of claim 6, wherein the side window is configured to receive the head of the handle by sliding the body over the head in a direction perpendicular to a longitudinal axis extending through the body.

8. The mount of claim 1, wherein the handle connector comprises:

a body defining a receptacle configured to receive the head of the handle, and

And a side body connected to the support bar, the side body being offset from the main body.

9. The mount of claim 1, wherein the set screw extends along a longitudinal axis of a body of the handle connector.

10. The mount of claim 9, wherein the longitudinal axis extends parallel to a portion of the support rod connected to the handle connector.

11. The mount of claim 1, wherein the set screw comprises a rounded head.

12. The mount of claim 1, wherein the set screw comprises a flat head.

13. The mount of claim 1, wherein the shank connector comprises a body defining a pin bore extending perpendicular to and offset from a longitudinal axis of the body, the pin bore configured to receive a pin, the pin bore positioned to guide the pin into engagement with the set screw to retain the set screw within the body.

14. A mount for holding a frame of reference during a surgical procedure, the mount comprising:

A reference frame connector located at a first end of the mount;

a handle connector at the second end of the mount, the handle connector comprising a body defining a receptacle, a distal opening, and a side window adjacent the distal opening configured to receive a head of a handle, and

A support rod extending between the reference frame connector and the handle connector.

15. The mount of claim 14, further comprising a set screw disposed in the body, the set screw movable along a longitudinal axis of the body to contact the head of the handle to lock the head within the receptacle of the handle connector.

16. The mount of claim 15, wherein the body includes a proximal end and a distal end at the distal opening, the longitudinal axis of the body extending through a radial center of the set screw between the proximal end and the distal end.

17. The mount of claim 16, wherein at least a portion of the support bar extends parallel to the longitudinal axis.

18. A method for performing a navigated surgical procedure, the method comprising:

securing the handle to the bone;

Connecting a mount holding a reference frame to the handle by sliding a handle connector of the mount onto a head of the handle such that the head passes through a side window defined by a body of the handle connector into a receptacle defined by the body;

Tightening a set screw of the handle connector such that the set screw contacts the head of the handle to apply pressure to the head and secure the head within the receptacle;

using the frame of reference during the navigated surgical procedure;

Detaching the mount from the handle after use of the frame of reference has ended, and

After the mount has been detached from the handle, a bracket is attached to the handle, the bracket configured to couple with an implant.

19. The method of claim 18, further comprising securing the implant to the scaffold, wherein the implant is a spinal rod.

20. The method of claim 18, wherein removing the mount from the handle comprises loosening the set screw from the head of the handle.