CN219782701U - External fixing rack for spinal column correction - Google Patents

Abstract

The utility model discloses a spine orthopedic external fixation frame, which belongs to the technical field of medical appliances, and comprises a head fixation device and a pelvis fixation device, wherein the head fixation device comprises a head ring for being fixed to the head of a patient; the pelvis fixing device comprises straight connecting pipes positioned at two sides of the patient and used for being fixed to the pelvis of the patient, and arc-shaped connecting pipes positioned in front of the patient and connected with the straight connecting pipes; an adjustable rod with adjustable length is arranged between the head ring and the arc-shaped connecting pipe, the upper end of the adjustable rod is connected with the head ring, and the lower end of the adjustable rod is connected with the arc-shaped connecting pipe through an angle-adjustable rod-rod clamp. The external fixation frame for spinal column correction has the advantages of minimally invasive operation, small incision, capability of adjusting correction angle, direction and distance, and good correction effect.

Description

External fixing rack for spinal column correction

Technical Field

The utility model relates to the technical field of medical appliances, in particular to an external fixing frame for spinal column correction.

Background

There are three general categories of spinal deformities: idiopathic scoliosis, congenital scoliosis, and neuromuscular scoliosis. In recent years, as students in the middle and primary schools with scoliosis visit have a trend to increase, the children with scoliosis can have the symptoms of neck distortion, uneven shoulders, uneven back, and the like, and women can also have the symptoms of asymmetric breast sizes, and the like, so that the appearance is influenced; when the deformity is serious, the chest is extruded to cause the chest to deform, thereby affecting the heart and lung functions, causing the lung functions to be reduced, reducing the vital capacity, seriously affecting the development of important viscera and even affecting the spinal cord.

In order to solve the problems, a spinal orthopedic device is often used clinically for orthopedic treatment of the spine of a patient, the traditional spinal orthopedic device is usually treated by adopting a lumbar-dorsal orthosis, a brace or internal fixation of the spine, the lumbar-dorsal orthosis and the brace have a long correction period when facing serious spinal deformity in actual use, the correction angle, direction and distance cannot be adjusted at any time, and the correction effect is not ideal; the internal fixation of the spine has large correction incision, needs to be adjusted by multiple operations, and has long recovery period.

Disclosure of Invention

The technical problem to be solved by the utility model is to provide the external fixing frame for spinal column correction, which has the advantages of minimally invasive operation, small incision, capability of adjusting correction angle, direction and distance and good correction effect.

In order to solve the technical problems, the utility model provides the following technical scheme:

an orthopedic external fixation frame for the spine, comprising a head fixation device and a pelvis fixation device, wherein:

the head fixation device includes a headband for fixation to a patient's head;

the pelvis fixing device comprises straight connecting pipes which are positioned at two sides of the patient and used for being fixed to the pelvis of the patient, and arc-shaped connecting pipes which are positioned in front of the patient and connected with the straight connecting pipes;

an adjustable rod with adjustable length is arranged between the head ring and the arc-shaped connecting pipe, the upper end of the adjustable rod is connected with the head ring, and the lower end of the adjustable rod is connected with the arc-shaped connecting pipe through an angle-adjustable rod-rod clamp.

Further, evenly be equipped with horizontal through-hole in the circumferencial direction of head ring, be equipped with the head bone needle in the through-hole, wherein:

the through hole is a threaded hole, and the head bone needle is provided with external threads matched with the threaded hole;

and/or the front end of the head bone needle is provided with a taper ejector rod;

and/or the rear end of the head bone needle is provided with a prismatic driving part.

Further, be equipped with the drag hook of Z shape on the head ring, the one end of drag hook is equipped with vertical string and establishes hook groove on the lateral wall of head ring, the other end of drag hook is equipped with lateral extension portion, the upper end of adjusting the pole is connected lateral extension portion, wherein:

the outer side wall of the hook groove is provided with a fixing piece for fixing the draw hook on the head ring;

and/or the transverse extension part is provided with a through hole extending along the length direction of the transverse extension part, and the upper end of the adjusting rod is slidably and lockably connected in the through hole;

and/or, the upper surface of the transverse extension part is provided with reticulate knurling.

Further, adjust pole from last to including last extension sleeve, threaded rod and lower extension sleeve down in proper order, wherein:

the upper end of the upper extension sleeve is connected with the head ring, the lower end of the upper extension sleeve is axially fixed and circumferentially rotatable and is provided with an adjusting knob for adjusting the insertion depth of the threaded rod in the upper extension sleeve, the inner side of the adjusting knob is provided with internal threads, and the upper end of the threaded rod is in threaded connection with the adjusting knob;

and/or the upper end of the lower extension sleeve is provided with an internal thread, the lower end of the threaded rod is in threaded connection with the lower extension sleeve, and the lower end of the lower extension sleeve is connected with the arc-shaped connecting pipe through the rod-rod clamp;

and/or at least one adjusting rod is respectively arranged between the head ring and the arc-shaped connecting pipe and positioned at the two sides in front of the patient and the middle part in front of the patient.

Further, the arc-shaped connecting pipe is connected with the straight connecting pipe through an angle-adjustable rod-rod clamp.

Further, the pelvic fixation device further comprises bone pins for being fixed to the ilium bones of both sides of the patient, respectively, the straight connecting tube connecting the bone pins by means of angularly adjustable needle-rod clamps, wherein:

the bone needle is a hollow bone needle;

and/or the front end of the bone needle is provided with a self-tapping and self-drilling blade opening;

and/or the front part of the bone needle is provided with external threads;

and/or each straight connecting tube is fixed to ilium on two sides of the patient through at least two bone spicules.

Further, the rod-rod clamp and/or the needle-rod clamp comprise an upper clamping block, a lower clamping block and a locking piece for axially locking and fixing the upper clamping block and the lower clamping block;

the side of going up the grip block is equipped with the grip groove, the side of lower grip block is equipped with down the grip groove, the middle part of going up grip block and lower grip block all is equipped with the elasticity decompression groove of lateral extension.

Further, the upper side wall and the lower side wall of the upper clamping groove and the lower clamping groove of the rod-rod clamp are arc-shaped;

and/or, the upper clamping groove and the lower clamping groove of the needle-rod clamp, wherein the upper side wall and the lower side wall of one clamping groove are arc-shaped, the upper side wall of the other clamping groove is arc-shaped, and the lower side wall is V-shaped;

and/or the upper clamping groove and the lower clamping groove are respectively internally provided with an anti-slip convex rib extending along the axial direction of the groove.

Further, the elastic decompression groove is a bidirectional parallel decompression groove or a unidirectional decompression groove.

Further, the retaining member includes passing in proper order go up grip block and lower grip block and threaded connection the lock bolt of grip block lower part down, wherein:

the opposite end surfaces of the upper clamping block and the lower clamping block are provided with meshing teeth;

and/or the rod part of the locking bolt is sleeved with a spring, one end of the spring abuts against the lower part of the upper clamping block, and the other end of the spring abuts against the upper part of the lower clamping block.

The utility model has the following beneficial effects:

the utility model relates to an external spinal column orthopedic fixing frame, which comprises a head fixing device and a pelvis fixing device, wherein the head fixing device comprises a head ring used for being fixed on the head of a patient, the pelvis fixing device comprises straight connecting pipes positioned at two sides of the patient and used for being fixed on the pelvis of the patient and arc-shaped connecting pipes positioned in front of the patient and connected with the straight connecting pipes, the connection between the straight connecting pipes and the pelvis is minimally invasive operation, the incision is small, the arc-shaped structure of the arc-shaped connecting pipes is prevented from being contacted with the skin of the patient, and the design of the straight connecting pipes and the arc-shaped connecting pipes ensures that the integral frame is good in firmness and the weight is reduced for a hollow structure; the adjustable adjusting rod of length is equipped with between head ring and the arc connecting pipe, and the upper end of adjusting the pole connects the head ring, and the arc connecting pipe is connected through the pole-pole clamp of angularly adjustable, can adjust correction angle and direction through the pole-pole clamp of angularly adjustable, can adjust correction distance through the adjustable adjusting rod of length, easy operation can adjust correction angle, direction and distance at will to realize adjusting patient's scoliosis angle and high purpose, can in time adjust in the face of serious deformity, avoid causing the influence to patient's cardiopulmonary function.

Drawings

FIG. 1 is a schematic elevational view of an external fixation frame for spinal column orthotics according to the utility model;

FIG. 2 is a schematic side elevational view of the spinal orthopaedic external fixation frame of FIG. 1;

FIG. 3 is a schematic view of the spinal orthopaedic external fixation frame of FIG. 1 in use;

FIG. 4 is a schematic view of the structure of the headband of FIG. 1 wherein (a) is a top view and (b) is a side view of (a);

FIG. 5 is a schematic view of the structure of the head pin of FIG. 1, wherein (a) is a front view and (b) is a right side view of (a);

FIG. 6 is a schematic view of the retractor of FIG. 1;

FIG. 7 is a schematic structural view of the upper extension sleeve of the adjustment lever of FIG. 1, wherein (a) is a perspective view, (b) is a front view of (a), and (c) is a front sectional view of (a);

FIG. 8 is a schematic view of the threaded rod of the adjustment rod of FIG. 1;

FIG. 9 is a schematic structural view of the lower extension sleeve of the adjustment lever of FIG. 1, wherein (a) is a front view and (b) is a cross-sectional view of (a);

FIG. 10 is a schematic view of the bone needle of FIG. 1, wherein (a) is a front view and (b) is a cross-sectional view of (a);

FIG. 11 is a schematic view of the straight connecting tube of FIG. 1, wherein (a) is a front view and (b) is a left side view;

FIG. 12 is a schematic view of the arc-shaped connection pipe of FIG. 1, wherein (a) is a front view and (b) is a side sectional view of (a);

FIG. 13 is a schematic view of the construction of the bolt of FIG. 1;

FIG. 14 is a schematic view of a nut on the upper end of the adjustment rod of FIG. 1 and mated with the bolt of FIG. 13;

FIG. 15 is a schematic view of an embodiment of the rod-rod clamp of FIG. 1;

FIG. 16 is an elevation view of the rod-rod clamp of FIG. 15;

FIG. 17 is a bottom view of the rod-rod clamp of FIG. 15;

FIG. 18 is a schematic view of the rod-rod clamp of FIG. 15 with the upper clamping block omitted, with additional enlarged views at the engagement teeth;

FIG. 19 is a schematic view of the construction of the locking bolt of FIG. 15, with additional illustration of a spring;

FIG. 20 is a schematic view of another embodiment of the rod-rod clamp of FIG. 1;

FIG. 21 is a schematic view of an embodiment of the needle-shaft clip of FIG. 1, wherein (a) is a perspective view and (b) is a front view of (a);

fig. 22 is a schematic view of another embodiment of the needle-shaft clip of fig. 1.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved more apparent, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.

The present utility model provides an orthopedic spinal external fixation frame, as shown in fig. 1-22, comprising a head fixation device and a pelvic fixation device, wherein:

the head fixation device comprises a headband 1 for fixation to the head of a patient;

the pelvis fixing device comprises a straight connecting pipe 2 positioned at two sides of a patient and used for fixing to the pelvis of the patient and an arc connecting pipe 3 positioned in front of the patient and connected with the straight connecting pipe 2;

a length-adjustable adjusting rod 4 is arranged between the head ring 1 and the arc-shaped connecting pipe 3, the upper end of the adjusting rod 4 is connected with the head ring 1, and the lower end of the adjusting rod is connected with the arc-shaped connecting pipe 3 through an angle-adjustable rod-rod clamp 5.

During operation, the patient is anesthetized firstly, the head ring 1 matched with the head circumference of the patient is selected, then the head ring 1 is fixed on the head of the patient, then the straight connecting pipes 2 of the pelvis fixing device are respectively fixed on two sides of the pelvis of the patient, the arc connecting pipes 3 of the pelvis fixing device are connected on the straight connecting pipes 2, the adjusting rods 4 are connected between the head ring 1 and the arc connecting pipes 3, finally the correction angle and the correction direction are adjusted according to the preoperative planning through the angle-adjustable rod-rod clamps 5, and the correction distance is adjusted through the length-adjustable adjusting rods 4, so as to correct the spine deformity of the patient (see fig. 3).

The utility model relates to an external spinal column orthopedic fixing frame, which comprises a head fixing device and a pelvis fixing device, wherein the head fixing device comprises a head ring used for being fixed on the head of a patient, the pelvis fixing device comprises straight connecting pipes positioned at two sides of the patient and used for being fixed on the pelvis of the patient and arc-shaped connecting pipes positioned in front of the patient and connected with the straight connecting pipes, the connection between the straight connecting pipes and the pelvis is minimally invasive operation, the incision is small, the arc-shaped structure of the arc-shaped connecting pipes is prevented from being contacted with the skin of the patient, and the design of the straight connecting pipes and the arc-shaped connecting pipes ensures that the integral frame is good in firmness and the weight is reduced for a hollow structure; the adjustable adjusting rod of length is equipped with between head ring and the arc connecting pipe, and the upper end of adjusting the pole connects the head ring, and the arc connecting pipe is connected through the pole-pole clamp of angularly adjustable, can adjust correction angle and direction through the pole-pole clamp of angularly adjustable, can adjust correction distance through the adjustable adjusting rod of length, easy operation can adjust correction angle, direction and distance at will to realize adjusting patient's scoliosis angle and high purpose, can in time adjust in the face of serious deformity, avoid causing the influence to patient's cardiopulmonary function. The utility model is suitable for spinal column orthopedic surgery, and particularly relates to a minimally invasive spinal column orthopedic external fixing frame.

As shown in fig. 4 to 5, a plurality of transverse through holes 11 may be uniformly provided in the circumferential direction of the head ring 1, and the head pins 6 are provided in the through holes 11 to firmly fix the head ring 1 to the head of the patient. The through hole 11 can be a threaded hole, the skull needle 6 is provided with an external thread 61 matched with the threaded hole, the firmness of connection between the skull needle 6 and the head ring 1 can be improved by adopting a threaded matching mode, the driving depth of the skull needle 6 can be conveniently adjusted, and the skull of a patient is prevented from being damaged due to over-deep driving.

The front end of the head bone needle 6 can be provided with a taper ejector rod 62, and the design of the taper ejector rod 62 can firmly support the skull of a patient, so that the firmness of the head ring 1 is improved. The rear end of the head bone pin 6 may be provided with a prismatic driving part (may be specifically a triangular prism shape) 63 to facilitate connection of the adjusting wrench. At this time, the head ring 1 should be first sleeved on the head of the patient, then the skull needle 6 is held, and the prismatic driving part 63 of the skull needle 6 is driven by using the adjusting wrench, the skull needle 6 is screwed along the through hole 11 of the head ring 1, so that the taper ejector rod 62 of the skull needle 6 is abutted against the skull of the patient, and the head ring 1 and the skull of the patient are connected into a whole.

As shown in fig. 1-2 and fig. 6, a Z-shaped drag hook 7 may be provided on the headband 1, one end of the drag hook 7 is provided with a hook groove 71 vertically hung on the side wall of the headband 1, the other end of the drag hook 7 is provided with a transverse extension 72, and the upper end of the adjusting rod 4 is connected with the transverse extension 72, so as to realize connection between the upper end of the adjusting rod 4 and the headband 1. The outer wall of the hook groove 71 may be provided with a fixing member 73 for fixing the hook 7 to the headband 1 to improve the firmness between the hook 7 and the headband 1. The fixing member 73 may be of conventional design in the art, for example, the fixing member 73 may be a (hexagonal) screw penetrating the outer side wall of the hooking recess 71 and screwed to the side wall of the headband 1.

The transverse extension portion 72 may be provided with a through hole 74 extending along the length direction thereof, the upper end of the adjusting rod 4 is slidably and lockably connected in the through hole 74, and the upper end of the adjusting rod 4 is locked after sliding in the through hole 74 to a proper position in operation, so as to prolong the adjusting range, and more conveniently adjust the correcting angle, direction and distance. To achieve a slidable and lockable connection of the upper end of the adjustment rod 4 in the through hole 74, conventional designs in the art can be used, for example, as shown in fig. 7 and 13-14, the upper end of the adjustment rod 4 can be provided with a (hexagonal) nut 40, and a (hexagonal) bolt 75 threaded into the through hole 74 with the nut 40. The upper surface of the lateral extension 72 may be provided with knurled knurling 76 to increase friction and make the locking of the bolt 75 more secure.

The adjusting rod 4 can take various structural forms which are easy to think of the person skilled in the art, for example, the adjusting rod can comprise a core rod and a sleeve which is sleeved on the core rod in a sliding way, one of the core rod and the sleeve is connected with the head ring, and the other is connected with the arc-shaped connecting pipe; however, to achieve precise adjustment, the present utility model preferably adopts the following structural form:

as shown in fig. 1-2 and fig. 7-9, the adjusting rod 4 may include an upper extension sleeve 41, a threaded rod 42 and a lower extension sleeve 43 sequentially from top to bottom, the upper end of the upper extension sleeve 41 is connected with the head ring 1, the lower end of the upper extension sleeve 41 is axially fixed and circumferentially rotatably equipped with an adjusting knob 44 for adjusting the insertion depth of the threaded rod 42 into the upper extension sleeve 41, the inner side of the adjusting knob 44 is provided with an internal thread 441, and the upper end of the threaded rod 42 is in threaded connection with the adjusting knob 44.

When the device is used, the adjusting knob 44 is driven to rotate in a handheld manner, the adjusting knob 44 is in threaded fit with the threaded rod 42, so that the threaded rod 42 moves in the inner hole of the upper extension sleeve 41, the length of the adjusting rod 4 is changed, and the correction distance is adjusted.

Further, the upper end of the lower extension sleeve 43 may be provided with an internal thread 431, the lower end of the threaded rod 42 is screwed in the lower extension sleeve 43 (i.e. the split adjustable structure), the lower end of the lower extension sleeve 43 is connected with the arc-shaped connecting pipe 3 through the rod-rod clamp 5, and the lower extension sleeve 43 can be driven to rotate as required before operation, so that the threaded rod 42 moves in the inner hole of the lower extension sleeve 43, and the adjusting rod 4 can reach the desired length quickly, thereby being convenient to use. It is conceivable that the threaded rod 42 and the lower extension sleeve 43 could also be of one-piece construction, in which case the length of the adjustment rod 4 could be adjusted solely by means of the upper extension sleeve 41 and the adjustment knob 44.

At least one adjusting rod 4 can be arranged between the head ring 1 and the arc-shaped connecting pipe 3 and positioned at the two sides and the middle of the front of the patient, and in the embodiment shown in the figure, the number of the adjusting rods 4 is 4, wherein two adjusting rods are respectively positioned at the two sides of the front of the patient, and the other two adjusting rods are positioned at the middle of the front of the patient.

As shown in fig. 1-2 and 12, the arc-shaped connection pipe 3 may be connected to the straight connection pipe 2 by an angle-adjustable rod-rod clamp 5 to facilitate adjustment of the relative positions of both the straight connection pipe 2 and the arc-shaped connection pipe 3.

As shown in fig. 1-2 and 10, the pelvic fixation device may further include spicules 8 for being fixed to the ilium of the patient on both sides, respectively, the straight connecting tube 2 is connected to the spicules 8 by an angle-adjustable needle-bar clip 9 to improve the firmness of the pelvic fixation device, and the needle-bar clip 9 is designed to facilitate the connection and fixation of the straight connecting tube 2 to the spicules 8 of the ilium of the patient. The bone needle 8 can be a hollow bone needle (hollow structure) which is convenient to be matched with the Kirschner wire, so that the Kirschner wire can be firstly implanted through the skin when the bone needle 8 is driven in, and then the bone needle 8 is implanted through a small incision minimally invasive mode matched with the Kirschner wire. The front end of the bone needle 8 can be provided with a self-tapping and self-drilling cutting edge 81, so that the bone needle 8 can be conveniently implanted once. The front part of the bone needle 8 can be provided with external threads 82, so that the holding force of the front part of the bone needle 8 in the bone is increased, and the firmness of the bone needle 8 is improved. Each straight connecting tube 2 is preferably fixed to the patient's both ilium by at least two spicules 8, with good security.

The rod-rod clamp 5 and the needle-rod clamp 9 can take various structural forms which can be easily conceived by those skilled in the art, and the present utility model preferably takes the following structural forms for convenience of implementation;

as shown in fig. 15-22, the rod-rod clamp 5 and/or the needle-rod clamp 9 includes an upper clamp block 51, a lower clamp block 52, and a locking member for axially locking and fixing the upper clamp block 51 and the lower clamp block 52;

the side of the upper clamping block 51 is provided with an upper clamping groove 511, the side of the lower clamping block 52 is provided with a lower clamping groove 521, and the middle parts of the upper clamping block 51 and the lower clamping block 52 are respectively provided with a transversely extending elastic decompression groove, so that the rod and the rod or the needle and the rod can be clamped and fixed quickly.

Depending on the upper clamping groove 511, the lower clamping groove 521, and the elastic decompression groove, the present utility model may have the following embodiments:

example 1 (rod-rod clip)

As shown in fig. 15 to 19, the upper and lower sidewalls of the upper clamping groove 511 and the lower clamping groove 521 of the rod-rod clamp 5 may be arc-shaped, that is, the upper clamping groove 511 and the lower clamping groove 521 are arc-shaped clamping grooves, so as to facilitate connection and fixation between rods. The elastic relief grooves may be bi-directional parallel relief grooves 53.

Example 2 (rod-rod clamp)

This embodiment is substantially the same as embodiment 1 except that: as shown in fig. 20, the elastic relief groove may be a one-way relief groove 54.

Example 3 (needle-rod clip)

As shown in fig. 21, the upper clamping groove 911 and the lower clamping groove 921 of the needle-rod clamp 9 may have an arc shape on the upper and lower side walls of one clamping groove 911, and the upper side wall of the other clamping groove 921 has a V-shape on the lower side wall, that is, the clamping groove 921 is a V-shaped pressurizing groove, so that the holding force on the bone needle 8 can be increased to facilitate the connection and fixation between the needle and the rod. The elastic relief grooves may be bi-directional parallel relief grooves 93.

Example 4 (needle-rod clip)

This embodiment is substantially the same as embodiment 3 except that: as shown in fig. 22, the elastic relief groove may be a one-way relief groove 94.

In the above embodiment, the upper clamping groove 511 and the lower clamping groove 521 may each be provided therein with a non-slip rib (tooth) 55 extending in the groove axis direction, which applies stress to the rod/needle in the clamping groove, increasing the rod/needle holding force and the fixing stability.

The locking member can take various structural forms which are easy to think of the person skilled in the art, for example, the locking member is a fixing clamp which is positioned on the side surfaces of the upper clamping block and the lower clamping block and is used for clamping and fixing the upper clamping block and the lower clamping block; however, for convenience of implementation and improved fixation, the present utility model preferably adopts the following structural form:

as shown in fig. 15-19, the locking member may include a locking bolt 56 that passes through the upper and lower clamping blocks 51 and 52 in sequence and is threadedly coupled to the lower portion of the lower clamping block 52. The head of the locking bolt 56 may be square in structure 561 to facilitate mating with a square sleeve. The shank end of the lock bolt 56 may be provided with a threaded section 562 and the shank middle of the lock bolt 56 may be a polished rod.

When the locking device is used, two rods or rods and needles to be connected are placed in two clamping grooves respectively, then the locking bolt 56 is driven, the head of the locking bolt 56 gradually approaches to and presses the upper clamping block 51, the upper clamping block 51 moves close to and presses the lower clamping block 52 at the rod part of the locking bolt 56, the locking bolt 56 is continuously driven, and the upper clamping block 51 and the lower clamping block 52 are elastically deformed at the elastic decompression groove so as to clamp and fix the rods/needles in the clamping groove.

The opposite end surfaces of the upper and lower clamping blocks 51 and 52 may be provided with engagement teeth (mouse teeth) 57 such that the engagement teeth 57 are designed to prevent the upper and lower clamping blocks 51 and 52 from rotating relative to each other after the locking bolts 56 are tightened to lock the upper and lower clamping blocks 51 and 52.

The rod portion of the locking bolt 56 may be sleeved with a (spreading) spring 58, one end of the spring 58 abuts against the lower portion of the upper clamping block 51, and the other end abuts against the upper portion of the lower clamping block 52, so that when the locking bolt 56 is loosened to adjust the relative angle between the upper clamping block 51 and the lower clamping block 52, the upper clamping block 51 and the lower clamping block 52 can be spread by the spring 58, and interference of the engaging teeth 57 is avoided. In particular, the through hole of the upper clamping block 51 for accommodating the rod portion of the locking bolt 56 may be a light hole, a first annular boss (not shown) is disposed at the lower portion of the inner side of the light hole, the through hole of the lower clamping block 52 for accommodating the rod portion of the locking bolt 56 includes a light hole section located at the upper portion and a screw hole section located at the lower portion, a second annular boss (not shown) is disposed at the inner side of the light hole section, and two ends of the spring 58 respectively abut against the first annular boss and the second annular boss.

While the foregoing is directed to the preferred embodiments of the present utility model, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present utility model, and such modifications and adaptations are intended to be comprehended within the scope of the present utility model.

Claims (10)

1. An orthopedic external fixation frame for the spine, comprising a head fixation device and a pelvis fixation device, wherein:

the head fixation device includes a headband for fixation to a patient's head;

the pelvis fixing device comprises straight connecting pipes which are positioned at two sides of the patient and used for being fixed to the pelvis of the patient, and arc-shaped connecting pipes which are positioned in front of the patient and connected with the straight connecting pipes;

an adjustable rod with adjustable length is arranged between the head ring and the arc-shaped connecting pipe, the upper end of the adjustable rod is connected with the head ring, and the lower end of the adjustable rod is connected with the arc-shaped connecting pipe through an angle-adjustable rod-rod clamp.

2. The external fixation frame for spinal column orthopedics according to claim 1, wherein transverse through holes are uniformly arranged in the circumferential direction of the head ring, head spicules are arranged in the through holes, and wherein:

the through hole is a threaded hole, and the head bone needle is provided with external threads matched with the threaded hole;

and/or the front end of the head bone needle is provided with a taper ejector rod;

and/or the rear end of the head bone needle is provided with a prismatic driving part.

3. The external fixator for spine correction according to claim 1, wherein a Z-shaped drag hook is provided on the headband, one end of the drag hook is provided with a hook groove vertically hung on the side wall of the headband, the other end of the drag hook is provided with a lateral extension part, and the upper end of the adjusting rod is connected with the lateral extension part, wherein:

the outer side wall of the hook groove is provided with a fixing piece for fixing the draw hook on the head ring;

and/or the transverse extension part is provided with a through hole extending along the length direction of the transverse extension part, and the upper end of the adjusting rod is slidably and lockably connected in the through hole;

and/or, the upper surface of the transverse extension part is provided with reticulate knurling.

4. The external fixation frame for spinal column orthopaedics according to claim 1, wherein said adjustment rod comprises, in order from top to bottom, an upper extension sleeve, a threaded rod and a lower extension sleeve, wherein:

the upper end of the upper extension sleeve is connected with the head ring, the lower end of the upper extension sleeve is axially fixed and circumferentially rotatable and is provided with an adjusting knob for adjusting the insertion depth of the threaded rod in the upper extension sleeve, the inner side of the adjusting knob is provided with internal threads, and the upper end of the threaded rod is in threaded connection with the adjusting knob;

and/or the upper end of the lower extension sleeve is provided with an internal thread, the lower end of the threaded rod is in threaded connection with the lower extension sleeve, and the lower end of the lower extension sleeve is connected with the arc-shaped connecting pipe through the rod-rod clamp;

and/or at least one adjusting rod is respectively arranged between the head ring and the arc-shaped connecting pipe and positioned at the two sides in front of the patient and the middle part in front of the patient.

5. The external spinal orthopedic fixation bracket of claim 1 wherein the arcuate connecting tube connects to the straight connecting tube via an angularly adjustable rod-rod clamp.

6. The external spinal orthopedic fixation frame of any of claims 1-5 wherein the pelvic fixation device further comprises spicules for fixation to ilium bones on both sides of a patient, respectively, the straight connecting tube connecting the spicules by an angularly adjustable needle-rod clip, wherein:

the bone needle is a hollow bone needle;

and/or the front end of the bone needle is provided with a self-tapping and self-drilling blade opening;

and/or the front part of the bone needle is provided with external threads;

and/or each straight connecting tube is fixed to ilium on two sides of the patient through at least two bone spicules.

7. The external spinal orthopedic fixation bracket of claim 6 wherein the rod-rod clamp and/or needle-rod clamp comprises an upper clamp block, a lower clamp block, and a locking member for axially locking the upper clamp block and lower clamp block together;

the side of going up the grip block is equipped with the grip groove, the side of lower grip block is equipped with down the grip groove, the middle part of going up grip block and lower grip block all is equipped with the elasticity decompression groove of lateral extension.

8. The external fixation frame for spinal column orthotics of claim 7 wherein the upper and lower sidewalls of the upper and lower clamping grooves of the rod-rod clamp are each arcuate;

and/or, the upper clamping groove and the lower clamping groove of the needle-rod clamp, wherein the upper side wall and the lower side wall of one clamping groove are arc-shaped, the upper side wall of the other clamping groove is arc-shaped, and the lower side wall is V-shaped;

and/or the upper clamping groove and the lower clamping groove are respectively internally provided with an anti-slip convex rib extending along the axial direction of the groove.

9. The external fixation frame for spinal column orthotics of claim 7 wherein the elastic relief groove is a bi-directional parallel relief groove or a unidirectional relief groove.

10. The external spinal orthopedic fixation bracket of claim 7 wherein the locking member comprises a locking bolt threaded through the upper and lower clamp blocks in sequence and threaded to the lower portion of the lower clamp block, wherein:

the opposite end surfaces of the upper clamping block and the lower clamping block are provided with meshing teeth;

and/or the rod part of the locking bolt is sleeved with a spring, one end of the spring abuts against the lower part of the upper clamping block, and the other end of the spring abuts against the upper part of the lower clamping block.