CN111568518B

CN111568518B - External fixation support for minimally invasive percutaneous wrist scaphoid fixation

Info

Publication number: CN111568518B
Application number: CN202010300936.1A
Authority: CN
Inventors: 洪磊
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-16
Filing date: 2020-04-16
Publication date: 2021-06-25
Anticipated expiration: 2040-04-16
Also published as: CN111568518A

Abstract

The invention discloses an external fixing support for minimally invasive percutaneous fixation of scaphoid bones of a wrist, which relates to the field of medical instruments and comprises a connecting frame, two limb fixing frames, two fixing frame position adjusting mechanisms, a sighting sleeve and a sighting sleeve fixing frame, wherein the two limb fixing frames are arranged at intervals and correspond to the two fixing frame position adjusting mechanisms one by one; the limb fixing frame comprises a screw rod, two sliding rods, two sliding blocks and two fixed bone calipers, the screw rod is parallel to the two sliding rods and arranged at intervals, threads in opposite directions are arranged at two ends of the screw rod respectively, and the two sliding blocks are in one-to-one correspondence with the threads at two ends of the screw rod and are in sliding fit with the two sliding rods; the two fixed bone calipers are connected with the two sliding blocks in a one-to-one correspondence mode, and one end of the screw rod is rotatably connected with the fixed frame position adjusting mechanism. The external fixation bracket for minimally invasive percutaneous scaphoid fixation has the advantages of convenience in operation, high operation efficiency, high accuracy and high safety.

Description

External fixation support for minimally invasive percutaneous wrist scaphoid fixation

Technical Field

The invention relates to the field of medical instruments, in particular to an external fixing bracket for minimally invasive percutaneous wrist scaphoid fixation.

Background

The percutaneous internal fixation technology effectively avoids the defects of large wound, periosteum soft tissue injury, easy occurrence of bone nonunion and the like of the incision reduction internal fixation operation. However, in the practical application process, risks such as prolonged operation time, unstable internal fixation, penetration of an internal fixation implant and the like can occur due to insufficient experience of an operator, the anatomical structure of a fracture part cannot be known thoroughly, and the anatomical characteristics of a fracture area cannot be completely reflected by fluoroscopy in a 2D operation.

Disclosure of Invention

Therefore, the invention provides an external fixing bracket for minimally invasive percutaneous scaphoid fixation, which aims to solve the problems of inconvenient operation, long operation time and high operation risk of the existing percutaneous internal fixing technology.

In order to achieve the purpose, the invention provides an external fixation support for minimally invasive percutaneous fixation of a wrist navicular bone, which comprises a connecting frame, two limb fixing frames, two fixing frame position adjusting mechanisms, a sighting sleeve and a sighting sleeve fixing frame, wherein the two limb fixing frames are arranged at intervals and correspond to the two fixing frame position adjusting mechanisms one by one; the limb fixing frame comprises a screw rod, two sliding rods, two sliding blocks and two fixed bone calipers, the screw rod is parallel to the two sliding rods and arranged at intervals, threads in opposite directions are arranged at two ends of the screw rod respectively, and the two sliding blocks are in one-to-one correspondence with the threads at two ends of the screw rod and are in sliding fit with the two sliding rods; the two fixed bone calipers are connected with the two sliding blocks in a one-to-one correspondence mode, one end of the screw rod is rotatably connected with the fixing frame position adjusting mechanism, one end of the two sliding rods is connected with the fixing frame position adjusting machine, and the aiming sleeve is connected with one fixing frame position adjusting mechanism through the aiming sleeve fixing frame.

Furthermore, the connecting frame comprises two connecting rods and a connecting shaft, wherein one ends of the two connecting rods are in one-to-one correspondence to be rotationally connected with two ends of the connecting shaft and are fastened through screws; two all be provided with the bar through-hole that extends along the length direction of connecting rod on the connecting rod.

Furthermore, the edge of the strip-shaped through hole is a plane.

Further, mount position adjustment mechanism includes first bolt, grip block and lead screw fixed block, first bolt is located the below of connecting rod, the grip block is located the top of connecting rod, the lead screw fixed block is located the top of grip block, the upper end of first bolt pass in proper order behind bar through-hole, the grip block with lead screw fixed block screw-thread fit, the one end and the lead screw fixed block of lead screw rotate to be connected, the one end centre gripping of slide bar is between grip block and lead screw fixed block.

Furthermore, one end of the screw rod penetrates through the screw rod fixing block, and a hexagonal hole is formed in the end portion of one end of the screw rod.

Furthermore, grooves are formed in the lower surface of the clamping block and the upper surface of the lead screw fixing block, and the size of each groove is matched with that of the corresponding sliding rod.

Further, aim sleeve mount and include bracing piece, holder, first regulating arm and second regulating arm, the lower extreme and one of them lead screw fixed block of bracing piece are connected, the one end centre gripping of holder is in the periphery of bracing piece to through the second bolt-up, the other end of holder passes through the third bolt and is connected with the one end of first regulating arm, the other end of first regulating arm passes through the fourth bolt and is connected with the one end of second regulating arm, the other end of second regulating arm passes through the fifth bolt and aims muffjoint.

Further, the first bolt, the second bolt, the third bolt, the fourth bolt and the fifth bolt are all hand-screwed bolts.

The invention has the following advantages: the external fixation bracket for minimally invasive percutaneous scaphoid fixation has the advantages of convenience in operation, high operation efficiency, high accuracy and high safety.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.

FIG. 1 is a schematic top view of an external fixation frame for minimally invasive percutaneous fixation of scaphoid in accordance with the present invention;

FIG. 2 is a schematic side view of an external fixation frame for minimally invasive percutaneous fixation of scaphoid in accordance with the present invention;

fig. 3 is a schematic perspective view of an external fixation bracket for minimally invasive percutaneous fixation of scaphoid in the wrist according to the present invention.

Description of reference numerals: 10. a connecting frame; 11. a connecting rod; 12. a connecting shaft; 13. a screw; 20. a limb fixing frame; 21. a screw rod; 22. a slide bar; 23. a slider; 24. fixing the bone calipers; 30. a fixing frame position adjusting mechanism; 31. a first bolt; 32. a clamping block; 33. a lead screw fixing block; 40. an aiming sleeve; 50. aiming sleeve fixing frame; 51. a support bar; 52. a clamping member; 53. a first adjustment arm; 54. a second adjustment arm; 55. a second bolt; 56. a third bolt; 57. a fourth bolt; 58. and a fifth bolt.

Detailed Description

The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, the external fixation bracket for minimally invasive percutaneous scaphoid fixation comprises a connecting frame 10, two limb fixing frames 20, two fixing frame position adjusting mechanisms 30, a sighting sleeve 40 and a sighting sleeve fixing frame 51, wherein the connecting frame 10 comprises two connecting rods 11 and a connecting shaft 12, the connecting shaft 12 is positioned between the two connecting rods 11, the connecting shaft 12 and the two connecting rods 11 are positioned on the same straight line, and one ends of the two connecting rods 11 are rotationally connected with two ends of the connecting shaft 12 in a one-to-one correspondence manner and are fastened through screws 13; the two connecting rods 11 are respectively provided with a strip-shaped through hole extending along the length direction of the connecting rods 11, and the strip-shaped through holes are used for guiding the fixing frame position adjusting mechanism 30. The edge of the strip-shaped through hole is a plane, so that the contact surface between the clamping block 32 and the connecting rod 11 can be increased, and the clamping block 32 is convenient to fix.

As shown in fig. 2, the fixing frame position adjusting mechanism 30 includes a first bolt 31, a clamping block 32 and a screw rod fixing block 33, the clamping block 32 is located above the connecting rod 11, the screw rod fixing block 33 is located above the clamping block 32, grooves are provided on the lower surface of the clamping block 32 and the upper surface of the screw rod fixing block 33, the grooves are used for clamping the sliding rod 22, and the size of the grooves matches with the size of the sliding rod 22. The first bolt 31 is located below the connecting rod 11, the first bolt 31 is a hand-screwed bolt, and the upper end of the first bolt 31 sequentially penetrates through the strip-shaped through hole and the clamping block 32 and then is in threaded fit with the screw rod fixing block 33. When the first bolt 31 is loosened, the clamping block 32 and the screw rod fixing block 33 can move along the length direction of the strip-shaped through hole, so that the distance between the two limb fixing frames 20 is changed; when the first bolt 31 is tightened, the clamping block 32 and the screw rod fixing block 33 are fixed, and one end of the screw rod 21 is clamped in the grooves of the clamping block 32 and the screw rod fixing block 33.

As shown in fig. 3, the two limb fixing frames 20 are arranged at intervals and correspond to the two fixing frame position adjusting mechanisms 30 one by one; the limb fixing frame 20 comprises a screw rod 21, two slide bars 22, two slide blocks 23 and two fixed bone calipers 24, the screw rod 21 and the two slide bars 22 are arranged in parallel at intervals, one end of the screw rod 21 is rotatably connected with a screw rod fixing block 33, one end of the screw rod 21 penetrates through the screw rod fixing block 33, a hexagonal hole is formed in the end part of one end of the screw rod 21, and threads in opposite directions are respectively arranged at two ends of the screw rod 21. One end of each of the two slide bars 22 is clamped in the grooves of the clamping block 32 and the screw rod fixing block 33, the two slide blocks 23 are in one-to-one correspondence to be in threaded fit with two ends of the screw rod 21, and meanwhile, the two slide blocks 23 are in sliding fit with the two slide bars 22. The two fixed bone calipers 24 are connected with the two sliding blocks 23 in a one-to-one correspondence manner, and the fixed bone calipers 24 are used for clamping the hands of a patient, so that the fixation of the fixator is completed. When using the hexagonal spanner to rotate lead screw 21 towards a direction, two fixed sclerotin callipers 24 are close to each other and finally block patient's hand under the drive of slider 23, and when using hexagonal spanner counter-rotation lead screw 21, two fixed sclerotin callipers 24 keep away from each other under the drive of slider 23 to loosen patient's hand.

The aiming sleeve fixing frame 51 is used for adjusting the direction of the aiming sleeve 40, the aiming sleeve fixing frame 51 comprises a supporting rod 51, a clamping piece 52, a first adjusting arm 53 and a second adjusting arm 54, the supporting rod 51 is of a vertically arranged rod-shaped structure, the lower end of the supporting rod 51 is rotatably connected with one of the lead screw fixing blocks 33, the supporting rod 51 can rotate along the axis of the supporting rod 51, one end of the clamping piece 52 is provided with a clamping part, one end of the clamping piece 52 is clamped on the periphery of the supporting rod 51 and fastened through a second bolt 55, through twisting the height that the adjustable holder 52 of second bolt 55 was held in bracing piece 51, the other end of holder 52 sets up the bar hole, is provided with third bolt 56 in the bar hole, and the other end of holder 52 passes through third bolt 56 and is connected with the one end of first regulating arm 53, through twisting the fixed position and the direction of the adjustable first regulating arm 53 of third bolt 56. First regulating arm 53 is the L type, the other end of first regulating arm 53 is connected with the one end of second regulating arm 54 through fourth bolt 57, can rotate second regulating arm 54 through twisting fourth bolt 57, be provided with the through-hole on the screw rod of fifth bolt 58, the periphery of aiming sleeve 40 is located to the screw rod cover of fifth bolt 58, the other end and the fifth bolt 58 of second regulating arm 54 are connected, through twisting the adjustable direction of aiming sleeve 40 of fifth bolt 58 during the use, aiming sleeve 40 is used for playing the guide effect to the screw. In the present embodiment, the second bolt 55, the third bolt 56, the fourth bolt 57, and the fifth bolt 58 are all hand bolts, and the angle of each joint can be conveniently adjusted by using the hand bolts.

Firstly, 2D to 3D conversion is carried out on scaphoid bone of a wrist joint through digital orthopedics, the penetration angle and distance of a guide pin and the ideal position of an internal fixture are measured, so that a theoretical and practical basis is established and reference is provided for treating fracture through intracutaneous fixation in clinic, then a fixator is adjusted according to calculated position, angle, distance and other parameters, so that the parameters of the aiming sleeve 40 are consistent with the pre-calculated parameters, and finally, a screw is accurately implanted into a body through the aiming sleeve 40. The computer aided design of individual percutaneous hollow screw is adopted to be placed into the internal fixation to repair scaphoid and pubic upper limb fractures of the wrist joints, individual schemes can be formulated according to different conditions of patients, and the individual percutaneous hollow screw is convenient and easy to operate, small in damage, reliable in fracture fixation, high in fracture healing rate, quick in recovery after treatment, few in complications and satisfactory in curative effect, and is most suitable for patients who strongly require recovery work as soon as possible and cannot accept plaster or brace fixation for a long time.

Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims

1. The external fixing support for minimally invasive percutaneous wrist scaphoid fixation is characterized by comprising a connecting frame, two limb fixing frames, two fixing frame position adjusting mechanisms, a sighting sleeve and a sighting sleeve fixing frame, wherein the two limb fixing frames are arranged at intervals and correspond to the two fixing frame position adjusting mechanisms one by one; the limb fixing frame comprises a screw rod, two sliding rods, two sliding blocks and two fixed bone calipers, the screw rod is parallel to the two sliding rods and arranged at intervals, threads in opposite directions are arranged at two ends of the screw rod respectively, and the two sliding blocks are in one-to-one correspondence with the threads at two ends of the screw rod and are in sliding fit with the two sliding rods; the two fixed bone calipers are connected with the two sliding blocks in a one-to-one correspondence manner, one end of the screw rod is rotatably connected with the fixing frame position adjusting mechanism, one end of the two sliding rods is connected with the fixing frame position adjusting machine, and the aiming sleeve is connected with one fixing frame position adjusting mechanism through the aiming sleeve fixing frame;

the connecting frame comprises two connecting rods and a connecting shaft, and one ends of the two connecting rods are rotationally connected with the two ends of the connecting shaft in a one-to-one correspondence manner and are fastened through screws; strip-shaped through holes extending along the length direction of the connecting rods are formed in the two connecting rods;

the fixing frame position adjusting mechanism comprises a first bolt, a clamping block and a lead screw fixing block, the first bolt is located below the connecting rod, the clamping block is located above the connecting rod, the lead screw fixing block is located above the clamping block, the upper end of the first bolt sequentially penetrates through the strip-shaped through hole and the clamping block and then is in threaded fit with the lead screw fixing block, one end of the lead screw is rotatably connected with the lead screw fixing block, and one end of the sliding rod is clamped between the clamping block and the lead screw fixing block;

aiming sleeve mount includes bracing piece, holder, first regulating arm and second regulating arm, the lower extreme and one of them lead screw fixed block of bracing piece are connected, the one end centre gripping of holder is in the periphery of bracing piece to through the second bolt-up, the other end of holder passes through the third bolt and is connected with the one end of first regulating arm, the other end of first regulating arm passes through the fourth bolt and is connected with the one end of second regulating arm, the other end of second regulating arm passes through the fifth bolt and aims muffjoint.

2. The external fixation frame for minimally invasive percutaneous fixation of the scaphoid of the wrist of claim 1, wherein the edge of the strip-shaped through hole is a plane.

3. The external fixation bracket for minimally invasive percutaneous fixation of the scaphoid according to claim 2, wherein one end of the screw rod penetrates through the screw rod fixation block, and a hexagonal hole is formed at an end of one end of the screw rod.

4. The external fixation bracket for minimally invasive percutaneous fixation of a scaphoid of a wrist and scaphoid as claimed in claim 3, wherein the lower surface of the clamping block and the upper surface of the lead screw fixing block are provided with grooves, and the size of the groove is matched with that of the sliding rod.

5. The external fixation brace for minimally invasive percutaneous fixation of a scaphoid of a wrist according to claim 4, wherein the first bolt, the second bolt, the third bolt, the fourth bolt and the fifth bolt are hand-screwed bolts.