阅读说明：本技术 用于胫骨开放骨折的急救复位装置 (First-aid reduction device for open fracture of tibia ) 是由 刁硕 陈伟 张奇 周君琳 侯志勇 张英泽 于 2021-08-02 设计创作，主要内容包括：本发明公开了用于胫骨开放骨折的急救复位装置,包括支撑体和可拆卸的固定在支撑体上的牵引复位机构。患者平躺,将患者的脚固定于下支撑段上,通过控制下支撑段远离或靠近中支撑段移动,可缩小断口,恢复下肢长度。下支撑段能够相对主体左右旋转,旋转调节使患者脚尖朝上,以此纠正骨折线远端断骨的内旋或外翻畸；然后驱动下支撑段的近端升高,使患者处于屈膝状态,使患者髌骨朝上,在屈膝的过程中可纠正骨折线近端断骨的内旋或外翻畸。三维牵引架作用于牵引钉上,通过牵拉牵引钉上下及左右移动,可对骨折线近端和远端进行侧向成角畸形和前后成角畸形牵拉复位。(The invention discloses an emergency reduction device for open fracture of tibia, which comprises a support body and a traction reduction mechanism detachably fixed on the support body. The patient lies down, is fixed in the lower support section with patient's foot on, keeps away from or is close to well support section through controlling the lower support section and removes, can reduce the fracture, resumes low limbs length. The lower supporting section can rotate left and right relative to the main body, and the rotating adjustment enables the tiptoes of the patients to be upward, so that the internal rotation or the external rotation of the broken bones at the far ends of the fracture lines can be corrected; then the proximal end of the lower supporting section is driven to rise, so that the patient is in a knee bending state, the patella of the patient faces upwards, and the pronation or the valgus deformity of the broken bone at the proximal end of the fracture line can be corrected in the knee bending process. The three-dimensional traction frame acts on the traction nail, and the proximal end and the distal end of the fracture line can be subjected to lateral angulation deformity and anterior-posterior angulation deformity traction reduction by pulling the traction nail up, down, left and right.)

1. A first aid resetting means for open fracture of tibia, comprising:

the middle support section (20) is placed on the bed body and used for supporting knee joints and shin bones of a patient, the far end of the middle support section (20) is rotatably connected with a movable leg (21), the near end of the middle support section (20) is slidably connected with the movable leg (21), and the movable leg (21) at the near end can stretch out and draw back to lift the near end of the middle support section (20);

the lower support section (30) is used for supporting the foot of a patient, the upper end face of the lower support section is flush with the upper end face of the middle support section (20), a fixing part (310) for fixing the foot of the patient is arranged on the upper surface of the support section, a gap for exposing the calcaneus and the tiptoe and enabling the calcaneus to be lapped on the lower support section (30) is formed in the fixing part (310), the proximal end of the lower support section (30) is connected with the distal end of the middle support section (20), and the lower support section can move close to or far away from the middle support section (20) and is locked, and can rotate left and right and is locked;

the device also comprises a traction resetting mechanism which is detachably fixed on the middle support section (20), wherein the traction resetting mechanism comprises two three-dimensional traction frames (40) which are respectively acted on the traction nails (100) which are driven into the far end and the near end of the broken bone and can pull the traction nails (100) to move up and down, left and right and be locked.

2. The emergency reposition device of claim 1, wherein the proximal end of the middle support segment (20) has a flexible support portion (210) for supporting the knee joint of the patient.

3. The emergency reposition device of claim 1, wherein the left and right sides of the middle support section (20) are provided with waste liquid guide grooves (220) along the length direction, and the distal ends of the waste liquid guide grooves (220) are provided with liquid discharge ports (221) connected with liquid discharge pipes.

4. The emergency reposition device of claim 1, wherein the fixing part (310) comprises a movable plate (311) which is located on the upper end surface of the lower support section (30), is flush with the upper end surface of the upper support section (10), can move left and right along the lower support section (30) and is locked, two semi-boot bodies (312) are arranged on the movable plate (311), the two semi-boot bodies (312) can be close to and tightly held on the ankle bone and the far end of the tibia of the patient, and the semi-boot bodies (312) comprise semi-boot shells and detachable elastic cushion layers fixed in the semi-boot shells.

5. The emergency return device according to claim 4, wherein a transverse traction screw (313) is fixed on the outer side of at least one half of the shoe body (312), the traction screw (313) axially movably penetrates through a first fixing block (314) fixed on the movable plate (311) and is rotationally limited, and a first adjusting nut (315) is in threaded connection with the inner side of the traction screw (313) positioned on the first fixing block (314).

6. The emergency repositioning device of claim 1, wherein the distal end of the middle support segment (20) has a slide cavity (230), and the connection structure between the lower support segment (30) and the middle support segment (20) comprises;

a sliding plate (321) which is arranged in the sliding cavity (230) in a sliding way and can be locked;

the connecting sleeve (322) is fixed at the far end of the sliding plate (321), and a first tooth surface is arranged on the end surface of the far end of the connecting sleeve (322);

one end of the rotating shaft (323) can rotatably extend into the connecting sleeve (322), the other end of the rotating shaft is fixed with the lower support section (30), the rotating shaft (323) is provided with external threads, and the cross section of the rotating shaft is non-circular;

the clamping ring (324) is sleeved on the rotating shaft (323) and provided with a through hole matched with the cross section of the rotating shaft (323), and one end, facing the connecting sleeve (322), of the clamping ring (324) is provided with a tooth surface II capable of being meshed with the tooth surface I; and

and the first lock nut (325) is in threaded connection with the rotating shaft (323) and can press the snap ring (324) on the connecting sleeve (322).

7. The emergency return device according to claim 6, wherein a rack plate (326) capable of floating up and down and locking is embedded in the upper end surface of the sliding plate (321), the rack plate (326) is arranged along the length direction of the bed body, a driving gear (327) is meshed above the rack plate (326), the driving gear (327) is connected with a driving shaft (328) rotatably connected with the middle supporting section (20), and the driving shaft (328) extends out of the sliding cavity (230) and is positioned on one side outside the middle supporting section (20).

8. The emergency reduction device according to claim 7, wherein the cross section of the end of the drive shaft (328) extending out of the middle support section (20) is polygonal, and is sleeved with a lock sleeve (329), the inner hole of the lock sleeve (329) is matched with the cross section of the drive shaft (328), the outer wall of the lock sleeve (329) is also polygonal, and the outer wall of the middle support section (20) is provided with a polygonal lock groove for accommodating the inner end of the lock sleeve (329).

9. The emergency reposition device of claim 1, wherein the left and right sides of the middle support section (20) are provided with side baffles (240) capable of folding downwards by 180 degrees, and the top of the side baffles (240) is provided with a structure for clamping and fixing with the three-dimensional traction frame (40).

10. The emergency return device of claim 9, wherein the top of the side guards (240) has a T-shaped slide, and the three-dimensional traction frame (40) has a slide (410) slidably engaged with the slide, and the slide (410) can be locked by a locking member.

11. The emergency repositioning device according to claim 1, wherein the three-dimensional traction frame (40) comprises:

the inserting rod (420) is vertically arranged and can be lifted and locked;

a cross bar (430) which is arranged on the top of the inserted bar (420) in a manner of sliding and locking along the transverse direction;

the positioning mechanism (440) is arranged at the inner end of the cross rod (430) and used for simulating the track of the traction nail (100) driven into the fractured bone and radially positioning the traction nail (100); and

and the driving mechanism (450) is used for driving the traction nail (100) to move up and down along the driving track.

12. The emergency repositioning device according to claim 11, wherein the three-dimensional traction frame (40) further comprises:

the fixed cylinder (421) is detachably fixed on the middle support section and is provided with a sliding chute which is arranged along the width direction of the bed body, and the opening of the sliding chute faces outwards;

the fast adjusting block (422) is of a ladder structure, the fast adjusting block (422) is slidably arranged in the sliding groove and is limited by the ladder to be separated from the sliding groove, the outer end of the fast adjusting block extends out of the sliding groove, a vertical insertion hole is formed in the fast adjusting block (422), two ends of the fixed cylinder (421) corresponding to the insertion hole are provided with polygonal notches, and a clamping block protrudes from the inner wall of the insertion hole; and

the spring (423) is pressed between the bottom of the sliding chute and the quick adjusting block (422) and applies outward thrust to the quick adjusting block (422);

the interval is equipped with many rings of sunken draw-in grooves on the outer wall of inserted bar (420), inserted bar (420) insert in the jack, and with the shape phase-match of breach on fixed cylinder (421), under the effect of spring (423), inserted bar (420) and jack eccentric settings for in the draw-in groove is gone into to the fixture block card, realize the lift and the locking of inserted bar (420).

13. The emergency reposition device of claim 11, wherein a second fixing block (431) is fixed on the top of the insertion rod (420), the cross-bar (430) has external threads and a non-circular cross-section, the second fixing block (431) has a hole for the cross-bar (430) to slide through and is matched with the cross-section of the cross-bar (430), and a second adjusting nut (432) is screwed on the cross-bar (430) at the inner side of the second fixing block (431).

14. The emergency return device of claim 11, wherein said positioning mechanism (440) comprises:

the fixing rod (441) is vertically fixed at the inner end of the cross rod (430); and

at least three first telescopic rods (442) are arranged in parallel from top to bottom, each first telescopic rod (442) is transversely arranged, one end of each first telescopic rod is fixed with the fixing rod (441), and the other end of each first telescopic rod is fixed with the positioning ring (443).

15. The emergency return device according to claim 11, wherein said drive mechanism (450) comprises:

the spiral teeth are distributed on the traction nail (100) to form a worm structure;

a second telescopic rod (444) which is transversely arranged, and one end of the second telescopic rod is fixed with the inner end of the cross rod (430); and

and the worm wheel (445) is rotatably connected to the other end of the second telescopic rod (444), the worm wheel (445) is assembled on the driving handle, and the worm wheel (445) can be meshed with the worm structure on the traction nail (100) for transmission.

Technical Field

The invention relates to the technical field of orthopedic medical instruments, in particular to an emergency reduction device for open fracture of tibia.

Background

Femur fracture is a common clinical fracture, and due to strong muscle strength of legs, the tibia of a patient is often shortened and deformed under the traction of muscles after being fractured, and the reduction, the length recovery and the effective maintenance in the operation are difficult. If the patient can not be anatomically reduced during the operation, complications such as malformation healing and poor lower limb force line can occur after the operation, thereby causing traumatic arthritis or osteoarthritis and seriously affecting the limb function and the life quality of the patient.

Intramedullary nail fixation or percutaneous minimally invasive implantation of a bone fracture plate is a common treatment method for tibial fracture, and intraoperative traction is an important means for reducing tibial fracture and recovering the length of lower limbs. At present, two assistants are generally needed to help to pull a patient when an intramedullary nail or percutaneous minimally invasive bone plate is implanted for operation, the two assistants respectively hold the near end and the far end of a broken bone to restore the tibia, however, the method cannot stably maintain fracture restoration and lower limb length, the restoration effect is not ideal, and the treatment effect is affected; moreover, the two assistants can crowd the space of the operator and influence the operation of the operator.

Therefore, the development of an emergency reduction device for open fracture of tibia is urgently needed, the clinical work needs are met, and the smooth recovery of the fracture part of a patient is facilitated.

Disclosure of Invention

The invention aims to solve the technical problem of providing an emergency reduction device for open fracture of tibia, so as to solve the problems in the background technology.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

a first aid resetting means for open fracture of tibia, comprising:

the middle support section is placed on the bed body and used for supporting knee joints and shin bones of a patient, the far end of the middle support section is rotatably connected with movable support legs, the near end of the middle support section is slidably connected with the movable support legs, and the movable support legs at the near end can stretch out and draw back to lift the near end of the middle support section;

the upper end surface of the lower supporting section is flush with the upper end surface of the middle supporting section, a fixing part for fixing the foot of the patient is arranged on the upper surface of the supporting section, a notch for exposing the calcaneus and the tiptoe out of the fixing part and enabling the calcaneus to be lapped on the lower supporting section is formed in the fixing part, and the near end of the lower supporting section is connected with the far end of the middle supporting section and can move close to or far away from the middle supporting section and be locked, and can rotate left and right and be locked;

the device also comprises a traction resetting mechanism which is detachably fixed on the middle support section, wherein the traction resetting mechanism comprises two three-dimensional traction frames which are respectively acted on the traction nails driven into the far end and the near end of the broken bone and can draw the traction nails to move up and down, left and right and be locked.

A further solution consists in that the proximal end of the middle support section has an elastic support part for supporting the knee joint of the patient.

A further technical scheme is that the left side and the right side of the middle support section are provided with a waste liquid guide groove along the length direction, and the far end of the waste liquid guide groove is provided with a liquid discharge port connected with a liquid discharge pipe.

The technical scheme is that the fixing part comprises a movable plate which is located on the upper end face of the lower supporting section, is flush with the upper end face of the upper supporting section, can move left and right along the lower supporting section and is locked, two half boot bodies are arranged on the movable plate, the two half boot bodies can be close to the closed ankle bones and the tibia far ends of the patient and tightly held in the ankle bones and the tibia far ends of the patient, and each half boot body comprises a half boot shell and an elastic cushion layer which is detachably fixed in the half boot shell.

The technical scheme is that a transverse traction screw rod is fixed on the outer side of at least one half of the shoe body, the traction screw rod axially movably penetrates through a first fixing block fixed on a movable plate and is limited by rotation, and an adjusting nut I is connected to the inner side of the traction screw rod, located on the first fixing block, through threads.

The further technical proposal is that the far end of the middle support section is provided with a sliding cavity, and the connecting structure between the lower support section and the middle support section comprises;

the sliding plate is slidably arranged in the sliding cavity and can be locked;

the connecting sleeve is fixed at the far end of the sliding plate, and a first tooth surface is arranged on the end surface of the far end of the connecting sleeve;

one end of the rotating shaft can rotatably extend into the connecting sleeve, the other end of the rotating shaft is fixed with the lower supporting section, the rotating shaft is provided with external threads, and the cross section of the rotating shaft is non-circular;

the clamping ring is sleeved on the rotating shaft and provided with a through hole matched with the section of the rotating shaft, and one end, facing the connecting sleeve, of the clamping ring is provided with a tooth surface II capable of being meshed with the tooth surface I; and

the first lock nut is in threaded connection with the rotating shaft and can compress the clamping ring on the connecting sleeve.

A rack plate capable of floating up and down and locking is embedded in the upper end face of the sliding plate, the rack plate is arranged along the length direction of the bed body, a driving gear is meshed above the rack plate, the driving gear is connected with a driving shaft which is rotatably connected with the middle supporting section, and the driving shaft extends out of the sliding cavity and is positioned on one side of the middle supporting section.

The technical scheme is that the cross section of one end of the driving shaft extending out of the middle support section is polygonal, the driving shaft is sleeved with a lock sleeve, an inner hole of the lock sleeve is matched with the cross section of the driving shaft, the outer wall of the lock sleeve is also polygonal, and a polygonal lock groove for accommodating the inner end of the lock sleeve is formed in the outer wall of the middle support section.

The further technical scheme is that the left side and the right side of the middle support section are provided with side baffles capable of being folded downwards by 180 degrees, and the tops of the side baffles are provided with structures clamped and fixed with the three-dimensional traction frame.

The technical scheme is that a T-shaped slide way is arranged at the top of the side baffle, the three-dimensional traction frame clamp is provided with a slide block in sliding connection and matching with the slide way, and the slide way and the slide block can be locked through a locking piece.

The further technical scheme is that the three-dimensional traction frame comprises:

the inserting rod is vertically arranged and can be lifted and locked;

the cross rod is arranged on the top of the inserted rod in a manner of being capable of sliding and locked transversely;

the positioning mechanism is arranged at the inner end of the cross rod and used for simulating the track of the traction nail which is driven into the fractured bone and radially positioning the traction nail; and

and the driving mechanism is used for driving the traction nail to move up and down along the driving track.

The further technical scheme is that the three-dimensional traction frame further comprises:

the fixed cylinder is detachably fixed on the middle support section and is provided with a sliding chute which is arranged along the width direction of the bed body, and the opening of the sliding chute faces outwards;

the quick adjusting block is of a stepped structure, is slidably arranged in the sliding groove and is limited by the step to be separated from the sliding groove, the outer end of the quick adjusting block extends out of the sliding groove, a vertical insertion hole is formed in the quick adjusting block, two ends of the fixed cylinder, corresponding to the insertion hole, are provided with polygonal notches, and a clamping block protrudes from the inner wall of the insertion hole; and

the spring is pressed between the bottom of the sliding chute and the quick adjusting block and applies outward thrust to the quick adjusting block;

the interval is equipped with many rings of sunken draw-in grooves on the outer wall of inserted bar, the inserted bar inserts in the jack, and with the shape phase-match of breach on the solid fixed cylinder, under the effect of spring, inserted bar and jack eccentric settings for in the draw-in groove is gone into to the fixture block card, realize the lift and the locking of inserted bar.

The technical scheme is that a second fixing block is fixed at the top of the inserting rod, external threads are arranged on the cross rod, the cross section of the second fixing block is non-circular, a hole for the cross rod to slide through is formed in the second fixing block and is matched with the cross section of the cross rod, and a second adjusting nut is connected to the cross rod on the inner side of the second fixing block through threads.

A further technical solution is that the positioning mechanism comprises:

the fixing rod is vertically fixed at the inner end of the cross rod; and

at least three first telescopic links are arranged in parallel from top to bottom, each first telescopic link is transversely arranged, one end of each first telescopic link is fixed to the fixed rod, and the other end of each first telescopic link is fixed to the positioning ring.

A further technical solution is that the drive mechanism comprises:

the spiral teeth are distributed on the traction nail to form a worm structure;

the second telescopic rod is transversely arranged, and one end of the second telescopic rod is fixed with the inner end of the cross rod; and

the worm wheel is rotatably connected to the other end of the second telescopic rod and assembled on the driving handle, and the worm wheel can be meshed with a worm structure on the traction nail for transmission.

Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:

the patient lies on the bed body, is fixed in the lower support section with patient's foot on, keeps away from or is close to well support section through control lower support section and removes, but the reduction fracture resumes low limbs length, and the device set up moreover and guaranteed that the heel flushes with the shank trailing edge, accords with the human form, makes length reset accurate, can not cause the secondary dislocation deformity.

When the tibia is subjected to pronation or valgus deformity reduction, the tibia is reduced according to the standard that the tiptoe of a human body is upward after the human body lies flat and the patella is upward in a knee bending state under a normal state. In the device, the lower support section can rotate left and right relative to the main body, and the rotating adjustment enables the tiptoe of the foot of the patient to be upward, so as to correct the internal rotation or the external rotation deformity of the broken bone at the far end of the fracture line; then the proximal end of the lower supporting section is driven to rise, so that the patient is in a knee bending state, the patella of the patient faces upwards, and the pronation or the valgus deformity of the broken bone at the proximal end of the fracture line can be corrected in the knee bending process.

In the device, three-dimensional traction frame can be dismantled with well support section and be connected, does not influence the debridement of first aid earlier stage to the affected part and handles. The three-dimensional traction frame acts on the traction nail, and the proximal end and the distal end of the fracture line can be subjected to lateral angulation deformity and anterior-posterior angulation deformity traction reduction by pulling the traction nail up, down, left and right.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a schematic structural view of a first-aid reduction device of the present disclosure;

fig. 2 is a schematic structural diagram (lying state) of the bed body in the emergency reduction device of the present disclosure;

fig. 3 is a schematic structural diagram of a bed body in the emergency reduction device of the present disclosure (knee bending state);

fig. 4 is a schematic structural diagram of a connecting part of a middle supporting section and a lower supporting section in the emergency resetting device of the disclosure;

fig. 5 is a schematic structural view of a three-dimensional traction frame in the emergency reduction apparatus of the present disclosure;

fig. 6 is a schematic structural view of a locking portion of a rotating shaft in the emergency reset device of the present disclosure.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. 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.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

As shown in fig. 1 to 6, the first-aid reduction device for open fracture of tibia comprises a support body and a traction reduction mechanism detachably fixed on a middle support section.

The middle support section 20 is placed on the bed body. The middle support section 20 is used for supporting knee joints and shin bone parts of patients, the far end of the middle support section 20 is rotatably connected with a movable supporting leg 21, the near end of the middle support section 20 is slidably connected with the movable supporting leg 21, and the movable supporting leg 21 can be fixed with a bed body in order to enable the middle support section 20 to be more stable during traction reduction. The top of the movable supporting leg 21 at the near end of the middle supporting section 20 is fixed with a universal ball bearing, the bottom surface of the middle supporting section 20 is provided with a guide sliding groove arranged along the length direction, and the universal ball bearing is arranged in the guide sliding groove in a sliding manner. The movable leg 21 at the proximal end of the medial support section 20 is capable of telescoping to raise the proximal end of the medial support section 20, typically to a height of 10-15mm, to place the patient in flexion. The movable supporting leg 21 at the near end of the middle supporting section 20 can be extended and retracted in various specific implementation forms, and an electric push rod and other existing extension structures can be arranged to fulfill the using purpose.

The proximal end of the middle support section 20 is provided with an elastic support part 210 for supporting the knee joint of the patient, and the support part 210 can slightly protrude out of the middle support section 20, so that the compression force on the popliteal fossa of the patient when the distal end of the tibia is pulled in the knee bending state is reduced.

In addition, an inflatable air bag sleeve is sleeved outside the supporting part 210, and the air bag is inflated to expand, so that the angle between the proximal end of the tibia and the middle supporting section 20 is increased, and the comfort level of the operation of the patient is further improved.

The left and right sides of the middle support section 20 are provided with waste liquid guide grooves 220 along the length direction, and the far ends of the waste liquid guide grooves 220 are provided with liquid discharge ports 221 connected with liquid discharge pipes. Because open fracture has the traumatism, at first need carry out debridement elimination to the affected part when first aid, can produce a large amount of waste liquids, the setting of waste liquid guide slot 220 can be collected the waste liquid and discharge from leakage fluid dram 221, has avoided patient's removal to the cleaness of bed has been guaranteed. The bottom surface of the waste liquid guide groove 220 is preferably arc-shaped, so that waste liquid can be effectively and thoroughly discharged from the liquid discharge port 221.

The lower support section 30 is used to support the patient's foot, and the proximal end of the lower support section 30 is connected to the distal end of the middle support section 20 so as to be movable toward and locked to the middle support section 20 and to be rotatable left and right and locked thereto.

As shown in fig. 4 and 6, the distal end of the middle support section 20 has a slide cavity 230, and the connection structure between the lower support section 30 and the middle support section 20 includes a slide plate 321, a connection sleeve 322, a rotation shaft 323, a snap ring 324 and a first locking nut 325.

The sliding plate 321 is arranged in the sliding cavity 230 in a sliding and locking manner, a rack plate 326 capable of floating up and down and locking by an electric push rod is embedded on the upper end surface of the sliding plate 321, the rack plate 326 is arranged along the length direction of the bed body, a driving gear 327 is meshed above the rack plate 326, a driving shaft 328 rotatably connected with the middle supporting section 20 through a bearing seat is connected onto the driving gear 327, and the other end of the driving shaft 328 extends out of the sliding cavity 230 and is positioned on one side outside the middle supporting section 20 to form a handle end.

The connecting sleeve 322 is fixed at the far end of the sliding plate 321, and a first tooth surface is arranged on the end surface of the far end of the connecting sleeve 322. One end of the rotating shaft 323 rotatably extends into the connecting sleeve 322 through a bearing, and the other end is fixed with the lower support section 30, so that the sliding plate 321 and the lower support section 30 are connected into a whole.

The outer wall of the rotating shaft 323 of the present disclosure has external threads, and the cross section of the rotating shaft 323 is non-circular. The snap ring 324 is sleeved on the rotating shaft 323 and has a through hole matching with the cross section of the rotating shaft 323, and the snap ring 324 and the rotating shaft 323 cannot rotate relatively. At the end of the snap ring 324 facing the connecting sleeve 322, a second tooth flank is provided, which can engage with the first tooth flank. The first lock nut 325 is screwed on the rotating shaft 323 and can press the snap ring 324 onto the connecting sleeve 322.

When the lower support section 30 needs to be adjusted in a left-right rotating mode, the first rotary locking nut 325 is loosened, the clamping ring 324 is separated from the connecting sleeve 322, the rotating shaft 323 drives the lower support section 30 to rotate freely, after the lower support section 30 rotates to a position, the first rotary locking nut 325 is screwed, the clamping ring 324 abuts against the connecting sleeve 322, the tooth surface one is meshed with the tooth surface two, the clamping ring 324 cannot rotate, and therefore the lower support section 30 is locked in a rotating mode.

When the lower support section 30 needs to move closer to or away from the middle support section 20, the rack plate 326 is in an upper state and is meshed with the driving gear 327, and the handle end of the driving shaft 328 is rotated forward or backward, so that the sliding plate 321 can be driven forward and backward, that is, the lower support section 30 is driven closer to or away from the middle support section 20. And the driving gear 327 maintains the engaged state with the rack plate 326, that is, the position of the slide plate 321 is locked. When the position of the lower support section 30 in the length direction needs to be adjusted greatly, the rack plate 326 is in the lower position state, the rack plate 326 is separated from the driving gear 327, the sliding plate 321 can slide freely in the sliding cavity 230, the position of the lower support section 30 can be adjusted quickly, the applicable requirements of patients with different heights can be met, the emergency time can be saved, after the lower support section 30 is adjusted in place, the rack plate 326 is adjusted to be in the upper position state, and the rack plate 326 is meshed with the driving gear 327 again, so that the position of the sliding plate 321 is locked.

Furthermore, the cross section of the end of the driving shaft 328 extending out of the middle support section 20 is polygonal, and is sleeved with a locking sleeve 329, the inner hole of the locking sleeve 329 is matched with the cross section of the driving shaft 328, the outer wall of the locking sleeve 329 is also polygonal, and the outer wall of the middle support section 20 is provided with a polygonal locking groove for accommodating the inner end of the locking sleeve 329. When the driving shaft 328 needs to be rotated, the lock sleeve 329 is pulled out of the lock groove, the driving shaft 328 rotates freely, and after the driving shaft 328 rotates in place, the lock sleeve 329 is pushed into the lock groove, so that the rotation of the driving shaft 328 is limited, and the reliability of the sliding plate 321 after being locked is further ensured.

The up end of lower support section 30 flushes with the up end of well support section 20, is equipped with the fixed part 310 that carries out the fixing to the patient foot in the upper surface of support section, having on the fixed part 310 and making the calcaneum dew and tiptoe go out and make the breach of taking on lower support section 30 with the bone, fixed part 310 with the fixed back of foot of patient's affected limb, the heel spills from the breach, makes the patient lie flat on the bed body after, and the patient's heel flushes with the shank trailing edge, satisfies ergonomic.

In the first-aid reposition device of the present disclosure, as shown in fig. 4, the fixing part 310 includes a movable plate 311 which is located on the upper end surface of the lower support section 30, is flush with the upper end surface of the upper support section 10, can move left and right along the lower support section 30, and is locked, and the movable plate 311 and the upper end surface of the lower support section 30 are in sliding fit through a concave-convex structure, and are tightly locked through screwing bolts. Two half-boots 312 are provided on the movable plate 311, and the two half-boots 312 can be closed to hug the distal ends of the ankle and tibia of the patient closely and expose the heel and toe. The half boot body 312 includes a half boot shell and an elastic cushion layer detachably fixed in the half boot shell. By adjusting the position of the movable plate 311, the half boot body 312 can be fixed to the left or right foot of the patient, thereby fixing the patient's limb or foot.

The setting of elastic cushion can not press against the wounded patient's foot, improves the travelling comfort of using, and elastic cushion can dismantle in addition, can avoid the cross infection of bacterium for disposable article uses, does benefit to the holistic disinfection of device simultaneously.

The elastic cushion layer can also comprise a bag made of medical latex materials, and the bag is filled with ice sand formed by freezing 15% sodium chloride solution. The ice bag is formed, so that congestion and bleeding of local tissues can be relieved, capillary vessel contraction and blood flow slowing are realized, tissue temperature and cell metabolism are reduced, and the effects of diminishing swelling, stopping bleeding, relieving pain and inhibiting inflammation diffusion are achieved.

The holding cavity formed by the two half boot bodies 312 is adjustable, and can be suitable for patients with different fat and thin. And a transverse traction screw 313 is fixed on the outer side of at least one half of the shoe body 312, the traction screw 313 axially movably penetrates through a first fixing block 314 fixed on the movable plate 311 and is rotationally limited, and an adjusting nut first 315 is in threaded connection with the inner side of the traction screw 313, which is positioned on the first fixing block 314. One of the two half boot bodies 312 is fixed in position, one of the two half boot bodies is adjustable in position, the traction screw 313 moves inwards by rotating the first adjusting nut 315, the distance between the two half boot bodies 312 is shortened, and the first adjusting nut 315 is limited outwards by the first fixing block 314, so that the two half boot bodies 312 can tightly hold the foot, the holding force of the two half boot bodies 312 is adjusted, the far ends of the foot and the tibia of a patient can follow the half boot bodies 312, and the foot of the patient can be fixed.

The device also comprises a detachable traction resetting mechanism fixed on the middle support section 20, the traction resetting mechanism can be detached and installed when in traction resetting, and other examinations and operations of medical staff on patients are not influenced. The traction reduction mechanism comprises two three-dimensional traction frames 40 which respectively act on the traction nail 100 which is driven into the far end and the near end of the broken bone and can draw the traction nail 100 to move up and down, left and right and lock.

The left and right sides of the middle support section 20 are provided with side guards 240 capable of being folded downwards by 180 degrees, and the top of the side guards 240 is provided with a structure for clamping and fixing the three-dimensional traction frame 40. The side baffles 240 can be installed on two sides of the middle support section 20 through hinges which can be opened and closed by 180 degrees, and can be vertically opened upwards when in use and folded downwards when not in use, so that the operation and treatment of debridement, examination and the like of a patient by a doctor are not influenced. The top of the side baffle 240 is provided with a T-shaped slide way, the three-dimensional traction frame 40 is clamped with a slide block 410 which is in slide fit with the slide way, and the slide way and the slide block 410 can be locked by a locking piece such as a tightening bolt, so as to adjust the position of the three-dimensional traction frame 40 on the middle support section 20.

As shown in fig. 5, the three-dimensional traction frame 40 includes a plunger 420, a cross bar 430, a positioning mechanism 440, and a driving mechanism 450, wherein the plunger 420 is vertically disposed and can be lifted and locked with respect to the slider 410. The cross bar 430 is provided on the top of the insert rod 420 in a manner capable of sliding and locking in a lateral direction. A positioning mechanism 440 is provided at the inner end of the cross-bar 430 for simulating the trajectory of the distraction nail 100 driven into the fractured bone and radially positioning the distraction nail 100. The driving mechanism 450 is used to drive the draw nail 100 up and down along the driving trajectory.

The three-dimensional traction frame 40 further comprises a fixed cylinder 421, a quick adjusting block 422 and a spring 423. The fixed cylinder 421 and the sliding block 410 are fixed to realize detachable fixation with the bed body, a sliding groove formed in the width direction of the bed body is formed in the fixed cylinder 421, and an opening of the sliding groove faces outwards. Fast accent piece 422 is stair structure, fast accent piece 422 is gliding arrange in the spout in and by the restriction of ladder department break away from in the spout, outside the outer end of fast accent piece stretched out the spout, seted up vertical jack on fast accent piece 422, the both ends that fixed section of thick bamboo 421 corresponds the jack have and are polygonal breach, the protrusion has a fixture block on the inner wall of jack. The spring 423 is pressed between the bottom of the chute and the quick adjustment block 422, and applies an outward pushing force to the quick adjustment block 422.

The interval is equipped with many rings of sunken draw-in grooves on the outer wall of inserted bar 420, inserted bar 420 inserts in the jack, and with the shape phase-match of breach on the fixed cylinder 421, under the effect of spring 423, inserted bar 420 and jack eccentric settings for in the draw-in groove is gone into to the fixture block card, realize the lift and the locking of inserted bar 420. When the height of the three-dimensional traction frame 40 needs to be adjusted, the quick adjusting block 422 is pressed inwards to extrude the spring 423, the inserting rod 420 and the inserting hole are arranged concentrically, the clamping block is separated from the clamping groove, the inserting rod 420 can move up and down freely, after the inserting rod 420 moves in place, the quick adjusting block 422 is loosened, under the action of the spring 423, the quick adjusting block 422 moves outwards to reset, the inserting rod 420 and the inserting hole are arranged eccentrically again, and the clamping block is clamped into the clamping groove.

A second fixing block 431 is fixed at the top of the inserting rod 420, the cross bar 430 is provided with external threads, the cross section of the cross bar 430 is non-circular, the second fixing block 431 is provided with a hole for the cross bar 430 to slide through and is matched with the cross section of the cross bar 430, and a second adjusting nut 432 is connected to the cross bar 430 on the inner side of the second fixing block 431 in a threaded manner. The transverse rod 430 can be moved laterally inward or outward by rotating the adjusting nut two 432 in a forward or reverse direction.

The positioning mechanism 440 comprises a fixed rod 441 and at least three telescopic rods 442. The fixing rod 441 is vertically fixed to the inner end of the cross bar 430. The three first telescopic rods 442 are arranged in parallel up and down, each first telescopic rod 442 is transversely arranged, one end of each first telescopic rod is fixed to the fixing rod 441, and the other end of each first telescopic rod is fixed to the positioning ring 443. The aperture of the positioning ring 443 is much larger than the diameter of the traction nail 100, and the doctor puts the traction nail 100 through the three positioning rings 443 and into the fractured bone, and then extends (or shortens) one middle telescopic rod 442, and shortens (or extends) the other two telescopic rods 442, and the three positioning rings 443 are in triangular contact with the traction nail 100, so that the radial and rotational limiting of the traction nail 100 is realized, and the trajectory of the traction nail 100 driven into the channel is simulated.

The driving mechanism 450 includes a helical gear, a second telescoping rod 444, and a worm gear 445. The helical teeth are distributed on the traction nail 100 to form a worm structure. The second telescopic rod 444 is transversely arranged, and one end of the second telescopic rod is fixed with the inner end of the cross rod 430. The worm wheel 445 is rotatably connected to the other end of the second telescopic rod 444, the worm wheel 445 is assembled on the driving handle, and the worm wheel 445 can be meshed with the worm structure on the traction nail 100 for transmission. By controlling the length of the second telescopic rod 444, the worm gear 445 can be meshed with a worm structure on the traction nail 100, and then the handle is driven by rotating to drive the traction nail 100 upwards or downwards.

In order to ensure the stability of the engagement between the worm gear 445 and the traction nail 100, a shell can be covered outside the worm gear 445 and the traction nail 100, the shell is provided with an upper plate, a lower plate and a side plate for connecting the upper plate and the lower plate, the shell is detachably connected with the fixed rod 441, the traction nail 100 needs to penetrate through the upper plate and the lower plate of the shell when being driven into a broken bone, the traction nail 100 is further positioned through the shell, the expansion of the second telescopic rod 444 is not influenced by the arrangement of the shell, and the driving handle is exposed, so that the effective engagement between the worm gear 445 and the traction nail 100 is ensured.

The patient lies flat on the bed body, utilizes fixed part 310 to be fixed in the lower support section 30 with patient's foot on, keeps away from or is close to well support section 20 through controlling lower support section 30 and removes, but the reduction fracture resumes low limbs length, and the device sets up moreover and has guaranteed that heel and shank trailing edge flush, accord with the human form, make length reset accurate, can not cause the secondary dislocation deformity.

When the tibia is subjected to pronation or valgus deformity reduction, the tibia is reduced according to the standard that the tiptoe of a human body is upward after the human body lies flat and the patella is upward in a knee bending state under a normal state. In the device, the lower support section 30 can rotate left and right relative to the main body, and the rotating adjustment enables the tiptoe of the patient to be upward, so as to correct the internal rotation or the external rotation deformity of the broken bone at the far end of the fracture line; then the proximal end of the lower support section 30 is driven to rise, so that the patient is in a knee bending state, the patella of the patient faces upwards, and the pronation or the valgus of the broken bone at the proximal end of the fracture line can be corrected in the knee bending process.

In the device, three-dimensional traction frame 40 can be dismantled with well support section and be connected, does not influence the debridement of first aid earlier stage to the affected part and handles. The three-dimensional traction frame 40 acts on the traction nail 100, the proximal end and the distal end of the fracture line can be subjected to anterior-posterior angular deformity traction reduction by traction of the traction nail 100 to move up and down, and the proximal end and the distal end of the fracture line can be subjected to lateral angular deformity traction reduction by traction of the traction nail 100 to move left and right.

The above is only a preferred embodiment of the invention, and any simple modifications, variations and equivalents of the invention may be made by anyone in light of the above teachings and fall within the scope of the invention.