Minimally invasive calcaneal distraction device

Abstract

The present invention specifically discloses a minimally invasive calcaneal distraction device, including a distractor, wherein the distractor includes an outer sleeve and an inner sleeve rod, the outer sleeve is provided with a sleeve, the inner sleeve rod passes through the sleeve, and the inner sleeve rod moves along the length direction of the sleeve, the outer sleeve is used to hold the calcaneal tuberosity fracture fragment, and the tail end of the inner sleeve rod is used to support the truncal process fracture fragment; the minimally invasive calcaneal distraction device of the present invention achieves the purpose of distracting the fracture line between the calcaneal tuberosity fracture fragment and the truncal process fracture fragment, and restores the connection height between the calcaneal tuberosity fracture fragment and the truncal process fracture fragment to the original height, has a simple structure, is convenient for single-person operation, and reduces the operating space.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and in particular to a minimally invasive calcaneal distraction device. Background Art

[0002] The calcaneal distractor is a commonly used auxiliary instrument for minimally invasive calcaneal surgery. Existing distractor instruments are mostly indirect traction calcaneal restoration techniques, which have the following problems: complex structure, time-consuming and labor-intensive operation, extreme occupation of the surgeon's operating space, and reduced surgical efficiency. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a minimally invasive calcaneal distraction device to achieve the purpose of distracting the fracture line between the calcaneal tuberosity fracture fragment and the truncal process fracture fragment, and restore the connection height between the calcaneal tuberosity fracture fragment and the truncal process fracture fragment to the original height. The structure is simple, easy to operate by one person and reduces the operating space.

[0004] The above-mentioned problem to be solved by the present invention is achieved through the following technical solutions:

[0005] A minimally invasive calcaneal distraction device comprises a distractor, wherein the distractor comprises an outer sleeve and an inner rod, wherein the outer sleeve is provided with a sleeve, the inner rod passes through the sleeve, and the inner rod moves along the length direction of the sleeve, the outer sleeve is used to hold the calcaneal tuberosity fracture fragment, and the tail end of the inner rod is used to support the calcaneal process fracture fragment.

[0006] Furthermore, the inner wall of the sleeve is provided with an internal thread, the outer wall of the inner sleeve rod is provided with an external thread, and the inner sleeve rod is threadedly matched with the sleeve.

[0007] Furthermore, the outer sleeve is also provided with a first handle, the first handle intersects with the sleeve, the first handle is also provided with a through hole for passing the inner sleeve rod, and the top end of the inner sleeve rod is provided with a second handle.

[0008] Furthermore, the structure of the outer sleeve is a "T"-shaped structure, and the structure of the inner sleeve rod is a "T"-shaped structure.

[0009] Furthermore, the first handle and the second handle are provided with anti-slip textures.

[0010] Furthermore, the minimally invasive calcaneal distraction device also includes a guide needle, which is used to support the calcaneal tuberosity fracture fragment and to open a slit in the outer sleeve, and the diameter of the guide needle is 2.0 mm.

[0011] Furthermore, the inner sleeve rod is a solid rod.

[0012] Furthermore, an outer wall of the bottom end of the sleeve is provided with an outer spiral pattern.

[0013] Furthermore, the internal thread is arranged on the upper inner wall of the sleeve, and the external spiral pattern is arranged on the lower outer wall of the sleeve.

[0014] Furthermore, the lower end of the sleeve is a tapered conical structure, the lower end of the conical structure is a sawtooth structure along the circumferential direction of the inner diameter of the conical structure, and the outer wall of the conical structure is provided with an external spiral pattern.

[0015] Beneficial effects: After adopting the minimally invasive calcaneal distraction device described in the present invention, due to the outer sleeve and inner sleeve rod structure, the outer sleeve is first used to hold the calcaneal tubercle fracture fragment, and then the inner sleeve rod is used to support the truncal process fracture fragment and make the truncal process fracture fragment move away from the calcaneal tubercle fracture fragment, thereby achieving the purpose of distracting the fracture line between the calcaneal tubercle fracture fragment and the truncal process fracture fragment, and the connection height between the calcaneal tubercle fracture fragment and the truncal process fracture fragment is restored to the original height. The structure is simple, easy to operate by one person, reduces the operating space, and improves the surgical efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a device diagram of a minimally invasive calcaneal distraction device of the present invention;

[0017] Figure 2 This is a diagram of a minimally invasive calcaneal distraction device of the present invention for fracture implementation;

[0018] Figure 3 This is a diagram of a minimally invasive calcaneal distraction device of the present invention during recovery;

[0019] The figure includes: a distractor 1, an outer sleeve 11, a sleeve 111, a first handle 112, an inner sleeve rod 12, a second handle 121, a calcaneal tuberosity fracture fragment 2, a calcaneal process fracture fragment 3, a fracture line 4, a fracture height L1, and an original height L2. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments, but the embodiments do not limit the present invention in any form.

[0021] Embodiment 1:

[0022] See also Figure 1-3A minimally invasive calcaneal distraction device comprises a distractor 1, wherein the distractor 1 comprises an outer sleeve 11 and an inner sleeve rod 12, wherein the outer sleeve 11 is provided with a sleeve 111, wherein the inner sleeve rod 12 passes through the sleeve 111, and wherein the inner sleeve rod 12 moves along the length direction of the sleeve 111, wherein the outer sleeve 11 is used to hold a calcaneal tuberosity fracture fragment 2, and wherein the tail end of the inner sleeve rod 12 is used to support a truncal process fracture fragment 3, thereby achieving the purpose of distracting a fracture line 4 between the calcaneal tuberosity fracture fragment 2 and the truncal process fracture fragment 3, and restoring the connection height between the calcaneal tuberosity fracture fragment 2 and the truncal process fracture fragment 3 to the original height L2, wherein the distractor 1 comprises a simple structure, is convenient for single-person operation, reduces the operation space, and improves the operation efficiency.

[0023] See also Figure 1 The inner wall of the sleeve 111 is provided with an internal thread, and the outer wall of the inner sleeve rod 12 is provided with an external thread. The inner sleeve rod 12 is threadedly matched with the sleeve 111 to achieve controllable and adjustable advancement of the inner sleeve rod 12 and the outer sleeve 11, thereby preventing the inner sleeve rod 12 from advancing uncontrollably and advancing with excessive force and speed, and preventing the soft tissue contacted by the inner sleeve rod 12 from being cut and pulled, thereby ensuring the effect of the operation.

[0024] See also Figure 1-3 The outer sleeve 11 is also provided with a first handle 112, which intersects with the sleeve 111. The first handle 112 is also provided with a through hole for passing the inner sleeve rod 12. The top of the inner sleeve rod 12 is provided with a second handle 121 for easy picking and operation.

[0025] See also Figure 1-3 The structure of the outer sleeve 11 is a "T"-shaped structure, and the structure of the inner sleeve rod 12 is a "T"-shaped structure, which is convenient for taking and operating and reduces the operating space.

[0026] See also Figure 1-3 The first handle 112 and the second handle 121 are provided with anti-slip textures to prevent excessive and rapid operation caused by unstable holding, further avoid cutting and pulling of soft tissue, and ensure the surgical effect.

[0027] The minimally invasive calcaneal distraction device also includes a guide needle, which is used to support the calcaneal tuberosity fracture fragment 2 and open a slit in the outer sleeve 11. The diameter of the guide needle is 2.0 mm. The guide needle first opens a slit and a path at the fracture line 4 between the calcaneal tuberosity fracture fragment 2 and the calcaneal process fracture fragment 3 to avoid failure of insertion of the outer sleeve 11 and to avoid cutting and pulling damage to the soft tissue caused by brute force insertion of the outer sleeve 11.

[0028] See also Figure 1-3 The inner sleeve rod 12 is a solid rod to prevent the inner sleeve rod 12 from being damaged due to uneven force.

[0029] See also Figure 1-3 The outer wall of the bottom end of the sleeve 111 is provided with an outer spiral pattern, so that the sleeve 111 can be easily screwed into the calcaneal tuberosity fracture fragment 2.

[0030] See also Figure 1-3 The internal thread is arranged on the upper inner wall of the sleeve 111, and the external thread is arranged on the lower outer wall of the sleeve 111, so as to ensure the screw connection between the inner sleeve rod 12 and the sleeve 111, and at the same time reduce the processing steps of the internal thread, reduce the processing difficulty, and reduce the processing time; ensure that the sleeve 111 is conveniently screwed into the calcaneal tuberosity fracture block 2, and at the same time reduce the processing steps and reduce the processing time.

[0031] See also Figure 1-3 The lower end of the sleeve 111 is a tapered conical structure, and the lower end of the conical structure is a serrated structure along the circumferential direction of the inner diameter of the conical structure. The outer wall of the conical structure is provided with an external spiral pattern, which makes it easy for the sleeve 111 to be screwed into the calcaneal tuberosity fracture fragment 2.

[0032] Working principle:

[0033] See also Figure 1-3 The fractured calcaneus includes a calcaneal tuberosity fracture fragment 2 and a truncal process fracture fragment 3 that collapses toward the calcaneal tuberosity fracture fragment 2. First, a guide needle is inserted into the calcaneal tuberosity fracture fragment 2, and a slit is made in the tuberosity fracture fragment 2 using the guide needle. Then, an outer sleeve 11 is screwed into the slit made by the guide needle, and the outer sleeve 11 is made to hold the calcaneal tuberosity fracture fragment 2. Then, the guide needle is withdrawn, and the inner sleeve rod 12 is screwed into the sleeve 111 of the outer sleeve 11, and the inner sleeve rod 12 is pushed into the outer sleeve 11 to bite and advance, so that the tail end of the inner sleeve rod 12 is against the truncal process fracture fragment 3 and the truncal process fracture fragment 3 is moved away from the calcaneal tuberosity fracture fragment 2. The operation is performed to achieve the effect of distracting the fracture line 4 between the calcaneal tuberosity fracture fragment 2 and the truncal process fracture fragment 3, thereby connecting the calcaneal tuberosity fracture fragment 2 and the truncal process fracture fragment 3, and restoring the connection height of the calcaneal tuberosity fracture fragment 2 and the truncal process fracture fragment 3 from the fracture height L1 to the original height L2. Even if the calcaneus is restored to the original height L2, the distraction is more direct and efficient. The outer sleeve 11 and the inner sleeve rod 12 directly act on the calcaneal tuberosity fracture fragment 2 and the truncal process fracture fragment 3, and will not cause the soft tissue of the calcaneus to be cut or pulled. The instrument is simple in design and can be easily operated by one person. It maintains stability after distraction, facilitates subsequent internal fixation operations, and improves surgical efficiency.

[0034] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0035] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A minimally invasive calcaneal distraction device, comprising a distractor, characterized in that: The spreader comprises an outer sleeve and an inner sleeve rod, the structure of the outer sleeve is a "T"-shaped structure, and the structure of the inner sleeve rod is a "T"-shaped structure; the outer sleeve is provided with a sleeve, the inner sleeve rod passes through the sleeve, and the inner sleeve rod moves along the length direction of the sleeve, wherein the upper inner wall of the sleeve is provided with an internal thread, the outer wall of the inner sleeve rod is provided with an external thread, the inner sleeve rod is threadedly matched with the sleeve, the lower end of the sleeve is a gradually tapered conical structure, the lower end of the conical structure is a serrated structure along the circumferential direction of the inner diameter of the conical structure, and the outer wall of the conical structure is provided with an external spiral pattern; the outer sleeve is also provided with a first holding handle, the first holding handle intersects with the sleeve, the first holding handle is also provided with a through hole for passing the inner sleeve rod, and the top end of the inner sleeve rod is provided with a second holding handle; the outer sleeve is used to hold the calcaneal tuberosity fracture fragment, and the tail end of the inner sleeve rod is used to support the intercept process fracture fragment.

2. A minimally invasive calcaneal distraction device according to claim 1, characterized in that: The first handle and the second handle are provided with anti-slip patterns.

3. The minimally invasive calcaneal distraction device according to claim 1, characterized in that: The minimally invasive calcaneal distraction device also includes a guide needle, which is used to support the calcaneal tuberosity fracture fragment and open a slit in the outer sleeve. The diameter of the guide needle is 2.0 mm.

4. The minimally invasive calcaneal distraction device according to claim 1, characterized in that: The inner sleeve rod is a solid rod.

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