External fixation support

Abstract

An external fixation strut for use with a bone alignment device and corresponding systems and methods are disclosed. The external fixation strut can provide an enhanced adjustable length range and can be connected to a bone alignment device, thereby enabling the bone alignment device to be used within a larger workable range. As a result, patient comfort can be improved because the need to swap out the external fixation strut can be prevented. The external fixation strut can also include a single measurement scale that can be easily viewed and used to adjust the length of the external fixation strut, thereby ensuring more accurate length adjustment.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is a non-provisional application of and claims the benefit of the filing date of pending U.S. Provisional Patent Application No. 62 / 823,844, filed on March 26, 2019, entitled “External Fixation Strut,” which is incorporated herein by reference in its entirety. Technical Field

[0003] The present disclosure relates generally to orthopedic devices, systems, and methods for facilitating alignment of fractures, and particularly to struts for use with external fixation systems that are arranged and configured to provide an increased range of adjustment while maintaining a single measurement scale. Background Art

[0004] Every year, people experience bone fractures. In many cases, people who experience bone fractures require the use of a bone alignment device (e.g., such as an external fixator) to align two or more bones or bone fragments. Bone alignment devices typically have a plurality of struts with adjustable lengths that are adjusted periodically (e.g., daily) according to a treatment plan or prescription (used interchangeably herein without intent to be limiting). The prescription specifies strut length adjustments to be made over time to ensure successful bone alignment.

[0005] Generally, each strut of the bone aligner is attached to two displacement rings or bases of the bone aligner. When the length of the strut is adjusted, the rings of the bone aligner can be moved closer together or further apart. The treatment plan or prescription typically requires that the spacing of the rings of the bone aligner have a large workable range, including a very small minimum spacing distance and a very large maximum spacing distance. Many struts cannot meet the entire workable range specified by the treatment plan or prescription. As a result, the struts of the bone aligner are typically replaced one or more times with new struts to accommodate the full workable range of the bone aligner specified by the treatment plan or prescription. Replacing the struts of the bone aligner requires a clinician visit and may be uncomfortable for the patient.

[0006] To avoid replacement of the brace, some commercially available braces have an extended telescopic body that allows for a large workable range. However, these braces have significant disadvantages, including, for example, the need for multiple measurement scales, complex patient prescriptions, and the need for a clinical visit to controllably reconfigure the telescopic components, presenting challenges to both the surgeon and the patient.

[0007] Therefore, it would be beneficial to provide a strut for a bone alignment device that has a large workable range of adjustable length to accommodate a treatment plan or prescription, while maintaining a single measurement scale to ensure that length adjustments are easily accomplished without the need for additional clinical visits for strut size changes or reconfigurations. Summary of the invention

[0008] This Summary is provided to introduce a selection of concepts in a simplified form that are further described below in the Detailed Description. This Summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be an aid in determining the scope of the claimed subject matter.

[0009] The present disclosure provides an external fixation strut. The external fixation strut may be attached to or form part of a bone alignment device. The external fixation strut may provide an enhanced adjustable length range, thereby preventing or minimizing any need to replace the external fixation strut during use of the bone alignment device to accommodate a minimum working range and a maximum working range of the bone alignment device specified by a prescription or treatment plan. The external fixation strut may maintain a single measurement scale so that a user can make length adjustments to the external fixation strut in a more reliable manner.

[0010] In one embodiment, the external fixed strut may include a body, a threaded rod, an actuator, a first or fixed arm, a coupler, a component, etc. (used interchangeably herein without limitation intended), and a second or moving arm, a coupler, a component, etc. (used interchangeably herein without limitation intended). The threaded rod may be non-threadedly coupled to the fixed arm and threadedly coupled to the moving arm such that rotation of the threaded rod moves the moving arm relative to the fixed arm.

[0011] For example, in one embodiment, a threaded rod can be positioned within an opening of the body. The threaded rod can be positioned through an unthreaded hole of the fixed arm. The fixed arm can be immovably fixed to the first end of the body. The threaded rod can be positioned through a threaded hole of the movable arm. The end of the threaded rod can be fixed within a hole in the actuator. In one embodiment, the hole formed in the actuator can be threaded to threadably engage the threaded rod. Alternatively, it is contemplated that the threaded rod can be fixed to the actuator by any now known or later developed mechanism, as long as rotation of the actuator causes the threaded rod to rotate, such as via a pin or the like.

[0012] The actuator can be positioned at the second end of the body. The fixed arm and the movable arm can be positioned around the body. The fixed arm and the movable arm can be connected to the first ring or base and the second ring or base of the bone alignment device, respectively. The actuator can be rotated to rotate the threaded rod, thereby causing the movable arm to move along the length of the body. In this way, as the distance between the fixed arm and the movable arm is adjusted, the spacing between the rings or bases of the bone alignment device can be adjusted.

[0013] In one embodiment, the body may include a single measuring scale to measure the distance between the fixed arm and the movable arm.

[0014] In one embodiment, the actuator may include a locking mechanism that prevents the actuator and the threaded rod from rotating, thereby preventing the moving arm from moving along the body.

[0015] In one embodiment, the present disclosure is directed to an external fixation strut for use with an external fixation system. In one embodiment, the external fixation strut includes a body including an inner cavity, a threaded rod positioned at least partially within the inner cavity of the body, an actuator operably coupled to the threaded rod such that, in use, rotation of the actuator rotates the threaded rod, a first fixed arm immovably coupled to the body, and a second movable arm threadably coupled to the threaded rod such that, in use, rotation of the threaded rod moves the second movable arm relative to the first fixed arm.

[0016] In one embodiment, the first fixed arm is non-movably coupled to the first end of the body adjacent the first end of the body, and the actuator is positioned adjacent the second end of the body.

[0017] In one embodiment, the first fixed arm includes a non-threaded opening formed therein, the non-threaded opening being arranged and configured to enable the threaded rod to pass therethrough, such that in use, rotation of the threaded rod does not cause the first fixed arm to move. The second movable arm includes a threaded opening formed therein, the threaded opening being arranged and configured to be threadably coupled to the threaded rod, such that rotation of the threaded rod causes the second movable arm to move relative to the threaded rod and relative to the first fixed arm.

[0018] In one embodiment, the actuator is coupled to the first end of the threaded rod.

[0019] In one embodiment, the strut further includes a pin for coupling the actuator to the threaded rod, the pin being arranged and configured to pass through openings formed in the actuator and the threaded rod.

[0020] In one embodiment, the threaded rod includes a base portion formed at a second end thereof, the base portion being positioned adjacent to the first end of the body when the threaded rod is positioned within the interior cavity of the body.

[0021] In one embodiment, a first end of the threaded rod opposite the base portion is arranged and configured to extend beyond a second end of the body when the base portion is adjacent the first end of the body, and the actuator is arranged and configured to threadably engage the first end of the threaded rod extending beyond the second end of the body.

[0022] In one embodiment, the first fixed arm and the second movable arm are each arranged and configured to be positioned about the body.

[0023] In one embodiment, the first fixed arm and the second movable arm each include an opening formed therein for receiving a portion of the body and enabling the portion of the body to pass therethrough.

[0024] In one embodiment, the external fixation strut comprises a single measuring scale for measuring the distance between the first fixed arm and the second movable arm.

[0025] In one embodiment, the measurement scale is located on an outer surface of the body along the length of the body.

[0026] In one embodiment, the measurement scale is laser etched into the outer surface of the body.

[0027] In one embodiment, the second moveable arm comprises a window arranged and configured to display the measurement scale so that, in use, a user can view the measurement scale when the second moveable arm is positioned over the measurement scale.

[0028] In one embodiment, the second movable arm is arranged and configured to move relative to the first fixed arm between a maximum length position and a minimum length position, in which the second movable arm is arranged and configured to contact the first fixed arm.

[0029] In one embodiment, each of the first fixed arm and the second movable arm includes relatively planar surfaces such that in the minimum length position, the planar surface of the second movable arm directly contacts the planar surface of the first fixed arm.

[0030] In one embodiment, the body includes first and second elongated slots extending along a longitudinal length thereof, the first and second elongated slots being arranged and configured to enable portions of the first fixed arm and the second movable arm to pass through the body.

[0031] In one embodiment, the body includes an end component, a first body component, and a second body component, wherein the first body component and the second body component are connected to the end component and extend from the end component, the first body component occupies a first portion of the inner periphery of the end component, the second body component occupies a second non-overlapping portion of the inner periphery of the end component, and the first body component and the second body component are spaced apart so that a gap is formed on either side of the second body component adjacent to the first body component.

[0032] In one embodiment, the second movable arm includes a first connecting part, a second connecting part, a first gap positioned between the first connecting part and the second connecting part, and a second gap; wherein the first gap is arranged and configured to enable the first body part to pass therethrough, and the second gap is arranged and configured to enable the second body part to pass therethrough, so that when the second movable arm is connected to the body, the first connecting part is arranged and configured to be positioned around the outer surface of the body, and the second connecting part is arranged and configured to be positioned within the inner cavity of the body.

[0033] In one embodiment, the second coupling member comprises a threaded hole for threaded coupling to the threaded rod.

[0034] In one embodiment, the first fixed arm includes a first connecting part, a second connecting part, a first gap positioned between the first connecting part and the second connecting part, and a second gap; wherein the first gap is arranged and configured to enable the first body part to pass therethrough, and the second gap is arranged and configured to enable the second body part to pass therethrough, so that when the first fixed arm is connected to the body, the first connecting part is arranged and configured to be positioned around the outer surface of the body, and the second connecting part is arranged and configured to be positioned within the inner cavity of the body.

[0035] In one embodiment, the second coupling member of the first fixed arm comprises a non-threaded hole for enabling the threaded rod to freely pass therethrough.

[0036] In one embodiment, the actuator includes a threaded hole for receiving an end of a threaded rod to threadably couple the threaded rod to the actuator such that rotation of the actuator rotates the threaded rod and thereby moves the second movable arm relative to the first fixed arm.

[0037] In one embodiment, the strut further comprises a locking mechanism operably associated with the actuator, the locking mechanism being arranged and configured to prevent the actuator and thus the threaded rod from rotating, thereby preventing movement of the second movable arm relative to the first fixed arm.

[0038] In one embodiment, the locking mechanism is movably positioned between a first locked position in which the actuator is prohibited from rotating relative to the body and a second unlocked position in which the actuator is free to rotate relative to the body.

[0039] In one embodiment, the locking mechanism includes a pivotable lever arm, which is arranged and configured to be positioned in a cavity formed in the actuator. In use, in the first locked position, the lever arm is arranged and configured to prevent the actuator from rotating relative to the body, and in the second unlocked position, the lever arm is arranged and configured to enable the actuator to rotate freely.

[0040] In one embodiment, the locking mechanism is biased to a first locked position.

[0041] In one embodiment, each of the first fixed arm and the second movable arm comprises a connector for coupling to a first ring or base and a second ring or base, respectively, of an external fixation system.

[0042] In one embodiment, the connectors are ball joints at the ends of the first fixed arm and the second movable arm, respectively.

[0043] In one embodiment, the connectors are universal joints at the ends of the first fixed arm and the second movable arm, respectively.

[0044] In one embodiment, the connector is an opening for receiving a fastener that is coupled to the first ring or base and the second ring or base, respectively, each opening being surrounded by a plurality of raised pegs to fix axial rotation of the first arm and the second arm relative to the first ring or base and the second ring or base, respectively.

[0045] Additional features and advantages of at least some of the embodiments of the present invention, as well as the structure and operation of various embodiments of the present invention are described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Specific embodiments of the apparatus of the present disclosure will now be described, by way of example only, with reference to the accompanying drawings, in which:

[0047] Figure 1 An embodiment of a bone alignment device is shown;

[0048] Figure 2 shows a perspective view of an embodiment of an external fixation strut according to one aspect of the present disclosure;

[0049] Figure 3 Shows Figure 2 A side view of the external fixation strut depicted in ;

[0050] Figure 4 Shows Figure 2 A posterior view of the external fixation strut depicted in ;

[0051] Figure 5 Shows Figure 2 A first exploded view of the external fixation strut depicted in;

[0052] Figure 6 Shows Figure 2 a second exploded view of the external fixation strut depicted in;

[0053] Figure 7 Shows Figure 2 A perspective view of the external fixation strut depicted in , the external fixation strut is shown in an intermediate adjustable length position;

[0054] Figure 8 Shows Figure 2 A side view of the external fixation strut depicted in , the external fixation strut is shown in an intermediate adjustable length position;

[0055] Fig. 9 Shows Figure 2 A rear view of the external fixation strut depicted in , the external fixation strut is shown in an intermediate adjustable length position;

[0056] Fig.10 Shows Figure 2 A front view of the external fixation strut depicted in , the external fixation strut is shown in an intermediate adjustable length position;

[0057] Fig.11 Shows Figure 2 A perspective view of the external fixation strut depicted in , the external fixation strut being shown in a minimum adjustable length position;

[0058] Fig.12 Shows Figure 2 A side view of the external fixation strut depicted in , the external fixation strut being shown in a minimum adjustable length position;

[0059] Fig.13 Shows Figure 2 A rear view of the external fixation strut depicted in , the external fixation strut is shown in a minimum adjustable length position;

[0060] Fig.14 According to one aspect of the present disclosure Figure 2 An embodiment of a threaded rod of an external fixation strut as depicted in;

[0061] Fig.15 According to one aspect of the present disclosure Figure 2A perspective view of an embodiment of a body of an external fixation strut as depicted in FIG.

[0062] Fig.16 Shows Fig.15 Alternative perspectives of the subject depicted in;

[0063] Fig.17 According to one aspect of the present disclosure Figure 2 A perspective view of an embodiment of a moving arm of an external fixed strut depicted in;

[0064] Fig.18 Shows Fig.17 Alternative perspective view of the moving arm depicted in ;

[0065] Fig.19 Shows Fig.17 A side view of the mobile arm depicted in;

[0066] Fig. 20 According to one aspect of the present disclosure Figure 2 A perspective view of an embodiment of a fixation arm of an external fixation strut as depicted in FIG.

[0067] Fig.21 Shows Fig. 20 A side view of the fixed arm depicted in;

[0068] Fig. 22 According to one aspect of the present disclosure Figure 2 An alternative embodiment of the mobile arm of the external fixed strut depicted in;

[0069] Fig.23 According to one aspect of the present disclosure Figure 2 An alternative embodiment of the fixation arm of the external fixation strut depicted in;

[0070] Fig.24 According to one aspect of the present disclosure Figure 2 A perspective view of an embodiment of an actuator for an external fixed strut as depicted in FIG.

[0071] Fig.25 Shows Fig.24 An alternative perspective view of the actuator depicted in ;

[0072] Fig.26 A locking mechanism according to one aspect of the present disclosure is shown. Figure 2 An exploded view of an embodiment of an actuator for an external fixed strut as depicted in;

[0073] Fig. 27 Shows Fig.26 An alternative view of the actuator of , with the locking mechanism in a locked configuration;

[0074] Fig.28 Shows Fig.26 an actuator, the locking mechanism being in an unlocked configuration;

[0075] Fig.29 shows a perspective view of an embodiment of a bone alignment device according to one aspect of the present disclosure;

[0076] Fig.30 A perspective view showing an alternative embodiment of a bone alignment device according to one aspect of the present disclosure; and

[0077] Fig.31 A perspective view of an alternative embodiment of an external fixation strut according to one aspect of the present disclosure is shown.

[0078] The drawings are not necessarily drawn to scale. The drawings are merely representations and are not intended to depict specific parameters of the present disclosure. The drawings are intended to depict various embodiments of the present disclosure and are therefore not to be considered limiting of scope. In the drawings, the same reference numerals represent the same elements. DETAILED DESCRIPTION

[0079] An external fixation strut is provided along with a system that may include the external fixation strut and corresponding methods of use. The external fixation strut may provide an increased or enhanced adjustable length range, thereby enabling the bone alignment device to which it is connected to be used over a larger workable range. As a result, treatment is simplified for the patient and surgeon because the need to swap out the external fixation strut may be prevented. The external fixation strut may also include a single measurement scale that may be easily viewed and used to adjust the length of the external fixation strut, thereby ensuring more accurate length adjustment.

[0080] Figure 1 An embodiment of a bone alignment device 100 is shown. The bone alignment device 100 may be an external fixator. Figure 1 As shown in FIG. 1 , the bone alignment device 100 may be formed as a hexapod having a circular metal frame having six telescopic struts 106 (in Figure 1 The first and second rings 102, 104 are connected by struts 106-1 to 106-6 (labeled in the figure). Each strut 106 can be independently extended or shortened relative to the rest of the frame, thereby allowing six different axes of movement.

[0081] In one embodiment, each strut 106 may include an outer body and an inner rod (e.g., a threaded rod). The outer body may be coupled to one of the rings (e.g., coupled to the second ring 104 via a joint). The inner rod may be coupled to another ring (e.g., coupled to the first ring 102 via a joint). To lengthen or shorten one of the struts 106, the outer body and the inner rod may be moved or translated relative to each other.

[0082] The bone alignment device 100 can be used to treat various bone fractures in a patient. Typically, the bone alignment device 100 is positioned around the patient and used to align two or more bones or bone fragments. To this end, the length of each strut 106 can be incrementally adjusted (e.g., shortened or lengthened) according to a prescription that specifies that each strut 106 should be adjusted over time to ensure successful bone alignment. In many cases, the length of each strut 106 should be adjusted daily to meet the prescription provided. Adjusting the length of each strut 106 adjusts the distance between the first ring 102 and the second ring 104. Therefore, the maximum distance and the minimum distance between the first ring 102 and the second ring 104 are determined by the maximum length and the minimum length of the strut 106, respectively.

[0083] Typically, a prescription may require that the first ring 102 and the second ring 104 be spaced very closely and spaced very far apart at different time periods. That is, for example, a typical prescription may require that the first ring 102 and the second ring 104 be initially spaced very closely, and then over time, by extending the struts, the first ring 102 and the second ring 104 may be spaced farther apart. Alternatively, for example, a prescription may require that the first ring 102 and the second ring 104 be initially spaced very far apart, and then over time, by shortening the struts, the first ring 102 and the second ring 104 may be spaced closer together. In either case, a number of struts 106 may not be adjustable to meet the minimum distance requirement and the maximum distance requirement between the first ring 102 and the second ring 104. As a result, the struts 106 may need to be replaced or replaced during the period of time that the patient uses the bone alignment device 100. For example, a first set of struts 106 having first maximum and minimum adjustable lengths may be attached to the first ring 102 and the second ring 104 during a first time period, and a second set of struts 106 having second maximum and minimum adjustable lengths may be attached to the first ring 102 and the second ring 104 during a second subsequent time period. Replacing the struts 106 while the bone alignment device 100 is coupled to the patient may be complicated and uncomfortable for the patient.

[0084] In order to avoid replacing the support 106, many different support designs have been proposed. However, many alternative support designs have one or more disadvantages. For example, one known support design requires multiple measurement scales to accommodate the telescopic components on the support, which introduces usability challenges when making length adjustments. Another known support design includes a threaded rod that extends beyond the ring, which may cause patient discomfort. Other known support designs are also plagued by one or more disadvantages.

[0085] As will be described herein, features according to the present disclosure may be used with any suitable bone alignment device now known or later developed. In this regard, the present disclosure should not be limited to the details of the bone alignment device disclosed and shown herein, unless explicitly required, and any suitable bone alignment device may be used in conjunction with the principles of the present disclosure.

[0086] Figure 2 An example of an embodiment of an external fixation post 200 is shown. The external fixation post 200 may be referred to herein as an external fixation post without intent to be limiting. The external fixation post 200 may have a length that is adjustable to provide an increased range of motion or length compared to known fixation posts. The external fixation post 200 may be used with or may form a part of any suitable bone alignment device now known or later developed. In an embodiment, the external fixation post 200 may be coupled to a first ring and a second ring of a bone alignment device. The external fixation post 200 may provide a range of adjustable lengths that enable a smaller minimum working distance and a larger maximum working distance to be achieved between the first ring and the second ring of a suitable bone alignment device to which the external fixation post 200 is coupled or forms a part. The external fixation post 200 may further provide a single measurement scale, thereby improving the ease of use and reliability of the external fixation post 200 when making length adjustments.

[0087] Figure 2 A perspective view of the external fixation strut 200 is shown. Figure 3 A side view of external fixation strut 200 is shown. Figure 4 A rear view of the external fixation strut 200 is shown. Figure 5 A first exploded view of external fixation post 200 is shown. Figure 6 A second exploded view of external fixation post 200 is shown.

[0088] refer to Figure 2-6 , the external fixation strut 200 may include a body 202, a threaded rod 204, an actuator 206, a fixed arm 208, and a movable arm 210. The fixed arm 208 may be coupled to a first base or a first ring of the bone alignment device. The movable arm 210 may be coupled to a second base or a second ring of the bone alignment device. The fixed arm 208 may be immovably fixed or mounted to the body 202. The movable arm 210 may be positioned in and around the body 202. The movable arm 210 may be constrained not to rotate around the body 202, but may be movable along the length of the body 202, such that the movable arm 210 may be movable relative to the fixed arm 208.

[0089] The threaded rod 204 may have an extended threaded portion 205 and a base 212. The threaded rod 204 may be positioned within an opening, hole, lumen, etc. of the body 202 such that the base 212 is positioned adjacent to the first end 203 of the body 202. The fixed arm 208 may include a hole or opening 2012 (see Fig. 20 ), the hole or opening allows the threaded rod 204 to pass therethrough unimpeded. The moving arm 210 and the actuator 206 may each have a threaded opening or hole 1712 and 2502, respectively (see Fig.17 and 18 ) for threadedly receiving the threaded rod 204.

[0090] The threaded portion 205 of the threaded rod 204 may be inserted through a hole formed in the fixed arm 208 and into the inner cavity of the body 202. The threaded rod portion of the threaded rod 204 may be threaded through a hole formed in the moving arm 210. When the base 212 is adjacent to the fixed arm 208, a portion of the threaded rod 204 may extend outside the body 202. The actuator 206 may be fixedly screwed to the threaded portion 205 of the threaded rod 204 at the second end 201 of the body 202 opposite the location of the fixed arm 208.

[0091] The actuator 206 can be rotated relative to the body 202, thereby rotating the threaded rod 204, which engages the threads of the moving arm 210 and the non-threaded engagement with the fixed arm 208 so that the moving arm 210 moves along the length of the body 202. For example, rotating the actuator 206 in a first direction (e.g., clockwise) can move the moving arm 210 toward the fixed arm 208, thereby reducing the working length of the external fixation strut 200. Rotating the actuator in a second direction (e.g., counterclockwise) can move the moving arm 210 toward the actuator 208, thereby increasing the working length of the external fixation strut 200.

[0092] refer to Figure 3-6 , the body 202 may include a measuring scale 302. The measuring scale 302 may be located on the outer surface 207 of the body 302 along the length of the body 202. In one embodiment, the measuring scale 302 may be laser etched into the outer surface of the body 202. The measuring scale 302 may be used to measure the adjustable length of the external fixation strut 200—for example, the distance between the fixed arm 208 and the movable arm 210. As described herein, the external fixation strut 200 may enhance usability by providing a single measuring scale 302 compared to known struts that require two or more measuring scales that may be challenging and confusing to use.

[0093] refer to Figure 4In one embodiment, the moving arm 210 may include an opening or window 402 that is aligned with the measurement scale 302. The opening or window 402 in the moving arm 210 may allow an individual to view the measurement scale 302 when the moving arm 210 is positioned over the measurement scale 302.

[0094] In use and as previously mentioned, the external fixation strut 200 and, more specifically, the mobile arm 210 and the fixed arm 208 may be coupled to a ring or base of a bone alignment device. The fixed arm 208 and the mobile arm 210 may each include any type of suitable connector or joint now known or later developed to facilitate coupling to a ring or base of a bone alignment device. The connector of the fixed arm 208 may allow the fixed arm 208 to be coupled to a first ring of a bone alignment device. The connector of the mobile arm 210 may allow the mobile arm 210 to be coupled to a second ring of a bone alignment device.

[0095] refer to Figure 2-6 In one embodiment, the mobile arm 210 may include or be coupled to a universal joint 214, and the fixed arm 208 may include or be coupled to a universal joint 216. The universal joint 214 may be attached or coupled to a first ring of a bone alignment device, such as the ring 102 of the bone alignment device 100. The universal joint 216 may be attached or coupled to a second ring of a bone alignment device, such as the second ring 104 of the bone alignment device 100, for example.

[0096] refer to Figure 5 and Figure 6 In one embodiment, the external fixation post 200 may include a washer 502. The washer 502 may be a low friction washer. The washer 502 may be positioned between the actuator 206 and the body 202. The washer 502 may enable the actuator 206 to rotate around the body 202 more easily.

[0097] Figure 5 and Figure 6 As further shown, in one embodiment, the external fixation strut 200 can include a pin 504. The pin 504 can couple the actuator 206 to the threaded rod portion of the threaded rod 204 and / or can couple together one or more components of the actuator 206. For example, the pin 504 can be positioned within one or more holes or openings formed in the actuator 206 and pass through corresponding and aligned holes or openings formed in the threaded rod portion of the threaded rod 204.

[0098] Figure 2-4 The external fixation strut 200 is shown in a first position. Specifically, Figure 2-4 The external fixed strut 200 is shown with the mobile arm 210 positioned at a maximum distance from the fixed arm 210. Figure 2-4 The external fixation strut 200 is shown having a maximum adjustable length.

[0099] Figure 7 The external fixation strut 200 is shown in a second position. Specifically, Figure 7 An external fixed strut 200 is shown with the mobile arm 210 positioned at an intermediate distance from the fixed arm 210. Thus, Figure 7 An external fixation strut 200 is shown having an intermediate adjustable length. Figure 7 A perspective view of an external fixation strut 200 having an intermediate adjustable length is shown.

[0100] Figure 8-10 Various views showing the external fixation strut in intermediate adjustable length positions, corresponding to Figure 7 Specifically, Figure 8 Shows the corresponding Figure 7 FIG. 2 is a side view of an external fixation post 200 depicting an external fixation post 200 . Fig. 9 Shows the corresponding Figure 7 FIG. 2 is a rear view of the external fixation post 200 depicting the external fixation post 200 . Fig.10 Shows the corresponding Figure 7 FIG. 2 is a front view of the external fixation support 200 depicted in FIG. Figure 7-10 , the moving arm 210 is positioned on the body 202 between the fixed arm 208 and the actuator 206 .

[0101] Fig.11 The external fixation strut 200 is shown in a third position. Specifically, Fig.11 The external fixed support 200 is shown with the mobile arm 210 positioned at a minimum distance from the fixed arm 210. Fig.11 The external fixation strut 200 is shown having a minimum adjustable length. Fig.11 A first view of an external fixation strut 200 having an intermediate adjustable length is shown. As shown, the movable arm 210 is adjacent to the fixed arm 208 and can touch the fixed arm.

[0102] Figure 12-13 Various views of the external fixation strut 200 are shown in the minimum adjustable length position, corresponding to Fig.11 Specifically, Fig.12 Shows the corresponding Fig.11 FIG. 2 is a side view of an external fixation post 200 depicting an external fixation post 200 . Fig.13 Shows the corresponding Fig.11 FIG. 2 is a rear view of the external fixation support 200 depicted in FIG. Figure 11-13, the movable arm 210 is positioned on the main body 202 close to the fixed arm 208 .

[0103] refer to Figure 2-13 , the external fixation post 200 provides a number of advantages. The external fixation post 200 provides an increased or greater range of adjustable lengths compared to other known posts, thereby preventing or minimizing any need to replace the external fixation post 200 when used with a bone alignment device. In various embodiments, the external fixation post 200 can provide a greater working range by increasing and / or maximizing the amount of threaded rod 204 and threaded rod portions of the body 202 that can be used. The external fixation post 200 can also allow the movable arm 210 to move along the entire length of the threaded rod 204 and can allow it to contact the fixed arm 208. In an embodiment, the fixed arm 208 and the movable arm 210 can have relatively planar corresponding surfaces such that the fixed arm 208 and the movable arm 210 can directly contact each other, such as Figure 11-13 As a result, the external fixation post 200 can be optimized for confined spaces, thereby allowing the rings or bases of the bone alignment device to be spaced closer together. As described herein, the external fixation post 200 can be connected to the rings or bases of the bone alignment device using any suitable connector and is not limited to Figure 2-13 Although not shown, the external fixation strut 200 can also be configured so that the connectors (e.g., ring connector components, such as 214 and 216) on the fixed arm 208 and the moving arm 210 are oriented between the fixed arm 208 and the moving arm 210, rather than outside the arms. In addition, as will be described in more detail below, the external fixation strut 200 can include any type of locking mechanism to prevent rotation of the actuator 206 and, therefore, movement of the moving arm 210.

[0104] Fig.14 An embodiment of a threaded rod 204 is shown. Fig.14 As shown in FIG. 1 , the threaded rod 204 may include a threaded portion 205 and a base 212. In one embodiment, the threaded rod 204 may include a hole or opening 1402. The hole or opening 1402 may be connected to Figure 5 and Figure 6 5 and 6 to couple or connect the threaded rod 204 to the actuator 206 .

[0105] Fig.15 and Fig.16 An embodiment of the main body 202 is shown. Specifically, Fig.15 A perspective view of the body 202 is shown, and Fig.16 An alternative perspective view of the body 202 is shown. Fig.15 and Fig.16, the body 202 may include a top or end member 1502, a first body member 1504, and a second body member 1506. In use, the top member 1502 may be coupled to or connected to the actuator 206. The first body member 1504 and the second body member 1506 may be connected to the top member 1502 and may extend from the top member 1502. Fig.15 and Fig.16 As shown in , the body 202 may have a generally cylindrical or tubular shape, although any other suitable shape may be used. Alternatively, it should be understood that the first body member and the second body member may be formed as a unitary component having a slot formed therein.

[0106] The first body member 1504 can be shaped to occupy a first portion of the interior perimeter of the top member 1502, and the second body member 1506 can be shaped to occupy a second non-overlapping portion of the interior perimeter of the top member 1502. The first body member 1504 and the second body member 1506 can be spaced apart such that a gap, opening, elongated slot, or the like 1508 (used interchangeably herein without intent to be limiting) is formed on either side of the second body member 1506 adjacent to the first body member 1504. That is, as shown, the body 202 can be arranged and configured to include a first elongated slot and a second elongated slot 1508 extending along a longitudinal length thereof. As further described herein, the arrangement of the first body member 1504 and the second body member 1506 (e.g., incorporating the elongated slot 1508) facilitates coupling of the fixed arm 208 and the movable arm 210 to the threaded rod 204 positioned within the body 202. That is, as will be described in more detail below, the slot, gap, or opening enables portions of the movable arm 210 and the fixed arm 208 to pass through the body 202. Fig.16 It is shown that the measurement scale 302 can be set on the first body member 1504.

[0107] Fig.17 A perspective view of an embodiment of a moving arm 210 is shown. As shown, the moving arm 210 may include a first member, portion, or coupling component 1702 and a second member, portion, or coupling component 1704 (used interchangeably herein without intent to be limiting). The first coupling component 1702 and the second coupling component 1704 may be separated by a first gap or opening 1706. The first coupling component 1702 and the second coupling component 1704 may be connected to an arm component 1708. The moving arm 210 may further include a second gap or opening 1710. It should be understood that the moving arm 210 may be formed in any suitable manner, for example, as a unitary member having one or more openings formed therein.

[0108] In one embodiment, the first opening 1706 can be shaped and configured to receive the first body member 1504 of the main body 202, and the second opening 1710 can be shaped and configured to receive the second body member 1506 of the main body 202. Therefore, when the mobile arm 210 is connected to the main body 202, the first coupling member 1702 can be positioned on the exterior of the main body 202, and the second coupling member 1704 can be positioned within the interior of the main body 202.

[0109] like Fig.17 As further shown in FIG. 1 , the second coupling member 1704 may include a threaded hole or opening 1712 for threaded coupling to the threaded portion 205 of the threaded rod 204. Thus, when the threaded rod 204 is rotated (eg, by rotation of the actuator 206), the movable arm 210 may move along the body 202.

[0110] As shown, the arm member 1708 can extend away from the first coupling member 1702 and the second coupling member 1704. The arm member 1708 may include one or more components for connecting the mobile arm 210 to a ring or other component of the bone alignment device. The arm member 1708 may include one or more components of any suitable type for connecting the mobile arm 210 to a ring or other component of the bone alignment device. For example, the arm member 1708 may include any combination of hinges, ball joints, universal joints, and fixed joints for connecting to a ring or other component of the bone alignment device. In one embodiment, the mobile arm 210 may include a connector member 214. The connector member 214 can be connected to a joint, such as a universal joint 214, a ball joint, etc.

[0111] Fig.18 An alternative perspective view of the moving arm 210 is shown. As shown, the window 402 can be positioned through the first coupling member 1702 to allow viewing of the measurement scale 302 when the moving arm 210 is attached to the body 202.

[0112] Fig.19 A side view of the moving arm 210 is shown. Fig.19 The relative arrangement of the first coupling member 1702, the arm member 1708, the connector member 1714, and the window 402 are shown.

[0113] Fig. 20A perspective view of an embodiment of a stationary arm 208 is shown. As shown, the stationary arm 208 may include a first member, portion, or coupling component 2002 and a second member, portion, or coupling component 2004. The first coupling component 2002 and the second coupling component 2004 may be separated by a first gap or opening 2006. The first coupling component 2002 and the second coupling component 2004 may be connected to the arm component 2008. The stationary arm 208 may further include a second gap or opening 2010. It should be understood that the stationary arm 208 may be formed in any suitable manner, for example, as a unitary member having one or more openings formed therein.

[0114] In one embodiment, the first opening 2006 can be shaped and configured to receive the first body member 1504 of the main body 202, and the second opening 2010 can be shaped and configured to receive the second body member 1506 of the main body 202. Thus, when the fixed arm 208 is connected to the main body 202, the first coupling member 2002 can be positioned on the exterior of the main body 202, and the second coupling member 2004 can be positioned within the interior of the main body 202.

[0115] like Fig. 20 As further shown in FIG. 2 , the second coupling member 2004 may include a hole or opening 2012. The threaded portion 205 of the threaded rod 204 may be positioned within the hole 2012. The hole 2012 may be unthreaded such that the threaded rod 204 may rotate and / or move unimpeded within the hole 2012, such that rotation of the threaded rod 204 does not affect the position of the fixed arm 208. Thus, when the threaded rod 204 is rotated (e.g., by rotation of the actuator 206), the fixed arm 208 may remain in a fixed position attached to the body 202.

[0116] As shown, the arm component 2008 can extend away from the first coupling component 2002 and the second coupling component 2004. The arm component 2008 may include one or more components for connecting the fixed arm 208 to the ring or other component of the bone alignment device. The arm component 2008 may include one or more components of any suitable type for connecting the fixed arm 208 to the ring or other component of the bone alignment device. For example, the arm component 2008 may include any combination of hinges, ball joints, universal joints, and fixed joints for connecting to the ring or other component of the bone alignment device. In an embodiment, the fixed arm 208 may include a connector component 2014. The connector component 2014 can be connected to a joint, such as a universal joint 216. For example, referring to Fig.31, the first arm 208' and the second arm 210' (e.g., the fixed arm and the moving arm) of the pillar 200' may include ball joints 2002', 2004' at their ends. In use, the ball joints 2002', 2004' and thus the moving arm 208' and the fixed arm 210' may be directly coupled to the first ring 102 and the second ring 104. That is, in one embodiment, the first ring 102 and the second ring 104 may include holes formed in their side surfaces for receiving protrusions 2003', 2005' extending from the ball joints 2002', 2004', which are incorporated into the fixed arm 208' and the moving arm 210' of the pillar 200'.

[0117] Fig.21 A side view of the stationary arm 208 is shown. Fig.21 The relative arrangement of the first coupling member 2002, the arm member 2008 and the connector member 2014 are shown.

[0118] Fig. 22 An alternative embodiment of a moving arm 2200 is shown. The moving arm 2200 may represent an alternative arrangement, form factor, and / or design to the moving arm 210. In various embodiments, the moving arm 2200 may include the same or similar components and may provide the same or similar functionality as the moving arm 210. Furthermore, in various embodiments, the moving arm 2200 may be attached to the body 202 and may operate in a similar manner as the moving arm 210. Thus, the external fixation strut 200 may alternatively be implemented with the moving arm 2200 or may alternatively include the moving arm.

[0119] like Fig. 22 As shown in , the mobile arm 2200 may include a threaded hole 2202 and a raised peg 2204. The raised peg 2204 may be positioned around the threaded hole 2202. The threaded hole 2202 allows the mobile arm 2200 to be bolted to a ring or base of a bone alignment device. The raised peg 2204 may fix the axial rotation of the mobile arm 2200 relative to the ring or base of the bone alignment device to which the mobile arm 2200 may be attached.

[0120] Fig.23 An alternative embodiment of a fixation arm 2300 is shown. The fixation arm 2300 may represent an alternative arrangement, form factor, or design to the fixation arm 208. In various embodiments, the fixation arm 2300 may include the same or similar components and may provide the same or similar functionality as the fixation arm 208. Furthermore, in various embodiments, the fixation arm 2300 may be attached to the body 202 and may operate in a similar manner as the fixation arm 208. Thus, the external fixation strut 200 may alternatively be implemented with the fixation arm 2300 or may alternatively include the fixation arm.

[0121] like Fig.23 As shown in , the fixation arm 2300 may include a threaded hole 2302 and a raised peg 2304. The raised peg 2304 may be positioned around the threaded hole 2302. The threaded hole 2302 allows the fixation arm 2300 to be bolted to a ring or base of a bone alignment device. The raised peg 2304 may fix the axial rotation of the fixation arm 2300 relative to the ring or base of the bone alignment device to which the fixation arm 2300 may be attached. Fig. 22 and Fig.23 The orientation of the raised stubs 2204 and 2304 shown in FIG. 2 is not limiting, as any roughened or stubbed surface can help prevent rotation of the fixed arm 2200 and the mobile arm 2300 relative to the ring or external fixator base.

[0122] Fig.24 24 shows a perspective view of an embodiment of the actuator 206. As shown, the actuator 206 may include a base 2402. Figure 2-6 As shown, the base 2402 can be positioned above the body 202 and the threaded rod 204. The actuator 206 is not limited to Fig.24 The shapes, sizes, and form factors depicted in FIG.

[0123] Fig.25 An alternative perspective view of the actuator 206 is shown. Specifically, Fig.25 A lower side view of the actuator 206 is shown. As shown, the actuator 206 may include a threaded hole 2502 for receiving the end of the threaded rod 204. After the threaded rod 204 is threaded into the threaded hole 2502, rotating the actuator 206 can cause the threaded rod 204 to rotate, which in turn causes the moving arm 210 to move relative to the body 202 and the fixed arm 208. The direction of movement of the moving arm 210 can be determined by the direction of rotation of the actuator 206 and thus the threaded rod 204. The actuator 206 can be fixed to the threaded rod 204 by any suitable mechanism now known or later developed. For example, as shown and described herein, the actuator 206 may include a threaded hole for threadedly engaging the threaded rod 204. Alternatively, it is contemplated that the actuator 206 can be coupled to the threaded rod by other mechanisms (e.g., such as a pin, etc.) so that rotation of the actuator 206 causes the threaded rod 204 to rotate.

[0124] The actuator 206 may include any suitable locking component or mechanism now known or later developed. The locking mechanism may prevent the actuator 206 from accidentally rotating. The locking mechanism may include any type of locking mechanism, including, for example, any combination of a ball detent, a spring plunger, and a poker chip.

[0125] For example, refer to Figure 26-28 , an example of an embodiment of an actuator 206 having an exemplary locking mechanism is disclosed. Fig.26An exploded view of an actuator 206 having an exemplary locking mechanism is shown. As shown, the locking mechanism may include a pin 2602, a spring 2604, and a lever arm 2606. The lever arm 2606 may be positioned within an opening or cavity 2608 formed in the actuator 206. When the lever arm 2606 is positioned in the cavity 2608, the pin 2602 may pass through an opening or hole 2610 of the lever arm 2604 through a slot to allow the lever arm 2604 to pivot.

[0126] Fig. 27 The actuator 206 is shown with the exemplary locking mechanism in a locked configuration. Fig. 27 As shown in , lever arm 2606 is positioned within cavity 2608. Fig.28 The actuator 206 is shown with the exemplary locking mechanism in an unlocked configuration. Fig.28 2608. As shown in FIG. 2609 , the lever arm 2606 is rotated or translated out of the cavity 2608. A user of the external fixation post 200 can manipulate the position of the lever arm 2606 to lock and unlock the actuator 206. In use, in the locked configuration, the lever arm 2606 is arranged and configured to prevent the actuator 206 from rotating. For example, in one embodiment, the lever arm 2606 is arranged and configured to interact with the body 202 or any other component of the post to prevent the actuator 206, and therefore the threaded rod 204, from rotating relative to the body 202. In the unlocked position, the lever arm 2606 is arranged and configured to enable the actuator 206, and therefore the threaded rod 204, to rotate freely. In one embodiment, the lever arm 2606 is biased to the locked position.

[0127] As described herein, the external fixation post 200, including any variations described herein, can be used with any bone alignment device now known or later developed. In general, any number of external fixation posts 200, including any variations described herein, can be used to connect two rings or bases of any type of bone alignment device described herein.

[0128] Fig.29 An embodiment of a first bone alignment device 2900 is shown. The bone alignment device may include one or more of the external fixation struts 200. Fig.29 As shown in , the bone alignment device 2900 can be formed as a hexapod having a circular metal frame having a first ring 2902 and a second ring 2904 connected by six external fixation struts 200 (for simplicity, only one external fixation strut 200 is labeled). The external fixation struts 200 can be connected to the first ring 2902 by a first universal joint 2906 connected to the mobile arm 210. The external fixation struts 200 can be connected to the second ring 2904 by a second universal joint 2908 connected to the fixed arm 208. Fig.29As shown in FIG. 2 , the outer fixation struts 200 may be positioned outside of the first ring 2902 and the second ring 2904 , thereby ensuring that the first ring 2902 and the second ring 2904 may be spaced very closely.

[0129] As described herein, the external fixation post 200 of the bone alignment device 2900 can extend the minimum and maximum working range of the bone alignment device 2900 while providing a single measurement scale 302 on each external fixation post 200 for the user to adjust the spacing between the first ring 2902 and the second ring 2904 to improve usability and reliability.

[0130] Fig.30 An embodiment of a second bone alignment device 3000 is shown. The bone alignment device 3000 may include one or more of the external fixation struts 200. Fig.30 As shown in , the bone alignment device 3000 may have a circular metal frame having a first ring 3002 and a second ring 3004 connected by four external fixation struts 200 (for simplicity, only one external fixation strut 200 is labeled). The external fixation struts 200 may include an alternative moving arm 2200 and an alternative fixed arm 2300. The external fixation struts 200 may be connected to the first ring 3002 by a first bolt 3006 connected to the alternative moving arm 2200. The external fixation struts 200 may be connected to the second ring 3004 by a second bolt 3008 connected to the alternative fixed arm 2300. As shown in FIG. Fig.30 As shown in FIG. 1 , the outer fixation struts 200 may be positioned outside of the first ring 3002 and the second ring 3004 , thereby ensuring that the first ring 3002 and the second ring 3004 may be spaced very closely.

[0131] As described herein, the external fixation post 200 of the bone alignment device 3000 can extend the minimum and maximum working range of the bone alignment device 3000 while providing a single measurement scale 302 on each external fixation post 200 for the user to adjust the spacing between the first ring 3002 and the second ring 3004 to improve usability and reliability.

[0132] In an embodiment, the external fixation post 200 may include an identification (ID) so that each external fixation post 200 attached to or forming part of a bone alignment device (e.g., bone alignment devices 2900 and 3000) can be distinguished. In one embodiment, the ID can be a bar code or other scannable code. In one embodiment, the ID can include text and / or graphic indicia. In general, any suitable ID now known or later developed that can be used to distinguish external fixation posts 200 can be used.

[0133] Although the present disclosure sets forth certain embodiments, many modifications, changes, and variations of the described embodiments are possible without departing from the field and scope of the present disclosure as defined in the appended claims. Therefore, it is intended that the present disclosure is not limited to the described embodiments, but rather that it has a full scope defined by the language of the following claims and their equivalents. The discussion of any embodiment is intended to be illustrative only and is not intended to imply that the scope of the present disclosure (including the claims) is limited to these embodiments. In other words, although illustrative embodiments of the present disclosure have been described in detail herein, it should be understood that the concepts of the present invention may be implemented and used in other ways, and the appended claims are intended to be interpreted as including such variations unless limited by the prior art.

[0134] The foregoing discussion has been presented for the purpose of illustration and description, and is not intended to limit the present disclosure to one or several forms disclosed herein. For example, for the purpose of simplifying the present disclosure, various features of the present disclosure are grouped together in one or more embodiments or configurations. However, it should be understood that various features of certain embodiments or configurations of the present disclosure may be combined in alternative embodiments or configurations. In addition, the following claims are hereby incorporated by reference into this detailed description, with each claim independently serving as a separate embodiment of the present disclosure.

[0135] As used herein, an element or step recited in the singular and preceded by the word "a" or "an" should be understood as not excluding plural elements or steps, unless such exclusion is explicitly stated. In addition, reference to "one embodiment" of the present disclosure is not intended to be interpreted as excluding the existence of additional embodiments that also include the recited features.

[0136] As used herein, the phrases "at least one", "one or more", and "and / or" are open expressions that are combined and separated in operation. The terms "one" (or "a kind"), "one or more", and "at least one" are used interchangeably herein. All directional references (e.g., near, far, upper, lower, upward, downward, left, right, lateral, longitudinal, front, rear, top, bottom, upper, lower, vertical, horizontal, radial, axial, clockwise, and counterclockwise) are used only for identification purposes to help the reader understand the present disclosure and do not create limitations, especially with respect to the position, direction, or use of the present disclosure. Unless otherwise specified, connection references (e.g., meshing, attachment, coupling, connection, and engagement) should be interpreted broadly and may include intermediate members between sets of elements and intermediate members that move relative to the elements. Thus, connection mentions do not necessarily infer that two elements are directly connected and have a fixed relationship to each other. All rotational mentions describe relative movement between various elements. Identification mentions (e.g., once, twice, first, second, third, fourth, etc.) are not intended to imply importance or priority, but are used to distinguish one feature from another. The drawings are for illustration purposes only and the dimensions, positions, orders, and relative sizes reflected in the drawings attached herein may vary.

Claims

1. An external fixation post for use with an external fixation system, the external fixation post comprising: a body, the body comprising an inner cavity; a threaded rod positioned at least partially within the interior cavity of the body; an actuator operably coupled to the threaded rod such that, in use, rotation of the actuator causes rotation of the threaded rod; a first fixed arm, the first fixed arm being non-movably coupled to the body; as well as a second movable arm threadably coupled to the threaded rod such that, in use, rotation of the threaded rod causes the second movable arm to move relative to the first fixed arm, The main body includes an end member, a first body member and a second body member, the first body member and the second body member are connected to the end member and extend from the end member, and the first body member and the second body member are spaced apart so that a gap is formed on either side of the second body member adjacent to the first body member.

2. The external fixation strut of claim 1, wherein the first fixation arm is non-movably coupled to the first end of the body adjacent the first end of the body, and the actuator is positioned adjacent the second end of the body.

3. The external fixation strut of claim 1 , wherein the threaded rod includes a first end and a second end, the actuator is coupled to the first end of the threaded rod, the threaded rod includes a base portion formed at the second end of the threaded rod, and when the threaded rod is positioned within the inner cavity of the body, the base portion is positioned adjacent to the first end of the body.

4. The external fixation strut of claim 3, wherein a first end of the threaded rod opposite the base portion is arranged and configured to extend beyond a second end of the body when the base portion is adjacent the first end of the body, and wherein the actuator is arranged and configured to threadably engage the first end of the threaded rod extending beyond the second end of the body.

5. The external fixation strut of claim 1, wherein the first fixed arm and the second movable arm are each arranged and configured to be positioned about the body.

6. The external fixation strut of claim 1 , wherein the first fixed arm and the second movable arm each include an opening formed therein for receiving a portion of the body and enabling the portion of the body to pass through the opening.

7. The external fixation strut of claim 1 , wherein the external fixation strut comprises a single measuring scale positioned on an outer surface of the body along a length of the body, the measuring scale being arranged and configured to measure a distance between the first fixed arm and the second movable arm.

8. An external fixation strut according to claim 7, wherein the second movable arm includes a window arranged and configured to display the measurement scale so that in use, when the second movable arm is positioned over the measurement scale, a user can view the measurement scale.

9. The external fixation strut of claim 1 , wherein the second movable arm is arranged and configured to move relative to the first fixed arm between a maximum length position and a minimum length position, in which the second movable arm is arranged and configured to contact the first fixed arm.

10. The external fixation strut of claim 9, wherein each of the first fixed arm and the second movable arm includes relatively planar surfaces such that in the minimum length position, the planar surface of the second movable arm directly contacts the planar surface of the first fixed arm.

11. The external fixation strut of claim 1 , wherein the body includes first and second elongated slots extending along a longitudinal length of the body, the first and second elongated slots being arranged and configured to allow portions of the first fixed arm and the second movable arm to pass through the body.

12. The external fixation strut of claim 1, wherein each of the first fixed arm and the second movable arm comprises a first coupling member, a second coupling member, a first gap positioned between the first coupling member and the second coupling member, and a second gap; The first gap is arranged and configured to enable the first body component to pass through the first gap, and the second gap is arranged and configured to enable the second body component to pass through the second gap, so that when the first fixed arm and the second movable arm are connected to the main body, the first connecting component is arranged and configured to be positioned around the outer surface of the main body, and the second connecting component is arranged and configured to be positioned within the inner cavity of the main body.

13. The external fixation strut of claim 1, further comprising a locking mechanism operably associated with the actuator, the locking mechanism arranged and configured to prevent the actuator and, therefore, the threaded rod from rotating, thereby preventing movement of the second movable arm relative to the first fixed arm.

14. The external fixation strut of claim 13, wherein the locking mechanism is movably positioned between a first locked position in which the actuator is prohibited from rotating relative to the body and a second unlocked position in which the actuator is free to rotate relative to the body.

15. An external fixation strut according to claim 14, wherein the locking mechanism includes a pivotable lever arm, the pivotable lever arm is arranged and configured to be positioned in a cavity formed in the actuator, and in use, in the first locked position, the lever arm is arranged and configured to prevent the actuator from rotating relative to the body, and in the second unlocked position, the lever arm is arranged and configured to enable the actuator to rotate freely.

Images