CN212235188U - Leg fixing device in knee joint operation - Google Patents

Abstract

The embodiment of the application discloses a leg fixing device in knee joint surgery, which comprises a bottom plate, a lifting rod, a clamping arm, a needle holder and a foot rest; considering the length of leg bones, the size of soft tissues, the front and back and height positions and angles of knee joints during operation and the front and back positions of feet, and also considering the reduction of the labor intensity of medical personnel, a bottom plate, a linear guide rail, a roller, a lifting rod, a clamping arm and a needle clamping device are adopted, thereby solving the problem that the thighbone and the shinbone need to be raised and then bent in the traditional knee joint replacement operation at home and abroad. In the operation process, at least 2 medical staff are required to firmly hold the legs for a long time to cooperate with doctors to carry out the operation. The legs shake due to the dead weight of the legs and the cutting force of the human body, so that the physical power of medical care personnel is consumed in a large amount, and the labor intensity is high. Meanwhile, the problems of low operation precision, low safety and low efficiency are caused.

Description

Leg fixing device in knee joint operation

Technical Field

The embodiment of the application relates to the field of medical instruments, in particular to a leg fixing device in knee joint surgery.

Background

Medical treatment technical development is rapid nowadays, some bone surgeries get up and become easier, but need the operation assistor to help going on smoothly of operation when doing bone surgeries, the removal that the bone surgery assistor can not realize going on all around while fixing the patient, it is inconvenient to use, and do not consider human body difference, press from both sides tight arm opening size and can not adjust, can not ensure to press from both sides firmly in the operation in-process. At present, in the conventional knee joint replacement operation at home and abroad, the femur and the tibia need to be stooped up and then the knee is bent. In the operation process, at least 2 medical staff are required to firmly hold the legs for a long time to cooperate with doctors to carry out the operation. The legs shake due to the dead weight of the legs and the cutting force of the human body, so that the physical power of medical care personnel is consumed in a large amount, and the labor intensity is high. Meanwhile, the operation precision is not high, the safety is low, and the efficiency is low. When knee joint operation is carried out, a patient lies on the operating table, the table surface is usually made of hard materials, and the rigidity of the whole operating table is very high. The length of the leg bone, the size of soft tissue, the front-back and height position and angle of the knee joint during operation and the front-back position of the foot are considered, and the labor intensity of medical staff is also considered to be reduced. Therefore, the method is realized by adopting a bottom plate, a linear guide rail, a roller, a lifting rod, a clamping arm and a needle holder.

SUMMERY OF THE UTILITY MODEL

The application provides a leg fixing device in knee joint operation, in domestic and foreign traditional knee joint replacement operation, need bend the knee after rise thighbone and shin bone. In the operation process, at least 2 medical staff are required to firmly hold the legs for a long time to cooperate with doctors to carry out the operation. The legs shake due to the dead weight of the legs and the cutting force of the human body, so that the physical power of medical care personnel is consumed in a large amount, and the labor intensity is high. Meanwhile, the problems of low operation precision, low safety and low efficiency are caused.

The application provides a leg fixing device in knee joint surgery, which comprises a bottom plate, a lifting rod, a clamping arm, a needle holder and a foot rest device;

the bottom plate consists of a plate body and a guide rail, the bottom plate consists of the plate body and the guide rail, the plate body is of a 'common' structure and is in short taper fit with the guide rail, a screw is connected with the guide rail from the bottom surface of the plate body, and the guide rail is of a double-V-shaped cross section;

the lifting rod comprises a lifting rod base body, a roller set I, a lifting rod fixing base, a locking nut, a lifting shaft and a locking handle I, wherein the fixing base is installed on the upper surface of the base body, the roller set is installed on the lower layer of the lifting rod base body, and the roller set I consists of 2 positioning roller sets and 2 aligning roller sets and is respectively positioned on two sides of the guide rail; the lifting rod fixing seat is provided with a lock nut, a tensioning sleeve and a lifting shaft; the lock nut is in threaded connection with the lifting rod fixing seat, the tensioning sleeve is divided into an inner ring and an outer ring, the inner ring and the outer ring are in taper fit, and a through groove is axially formed in the inner ring; the outer ring is fixedly connected with the fixed seat, and the inner ring is connected with the lifting shaft in a sliding manner;

the locking handle consists of an adjustable handle, a screw rod, a copper nut and a jackscrew, the adjustable handle is connected to the top end of the screw rod, the bottom end of the screw rod is in threaded connection with the lower layer of the seat body, grooves for placing the adjustable handle are formed in two sides of the seat body, and the copper nut is fastened on the end face of the screw rod through a fixed screw;

the clamping arm is of a U-shaped structure, the uppermost ends of two sides of the U shape are provided with long round holes, and through grooves are formed in the vertical direction of two side walls of the U shape;

the needle holder consists of a needle holder fixing seat, a rotating shaft, a tensioning wheel, a universal shaft, a needle locking wheel, a positioning wheel and a limiting screw; the needle holder fixing seat is a hinge structure consisting of a needle holder fixing seat, a rotary seat body and a rotary shaft; the rotating shaft is arranged in the long round hole on the clamping arm and is connected with the rotating shaft through a tensioning wheel, and the rotating shaft is fixed on the fixed base body; the universal shaft is arranged at the joint of the fixed seat body and the rotary seat body, is of a hollow structure, and the shaft end is provided with a cross groove; the lock pin wheel is in threaded connection with the universal shaft and is matched with the universal shaft in a long taper way; the positioning wheel is arranged on the rotary seat body, the rotary seat body is extruded by utilizing the lever principle so as to clamp the universal shaft, and the limiting screw is arranged on the rotary seat body;

the foot holds in the palm the device by foot support pedestal, foot rest, roller train II, locking handle II, steel ball locking seat are constituteed, wherein locking handle II with locking handle I's structure is the same, and the foot holds in the palm the pedestal and passes through steel ball locking seat and connect the foot rest, steel ball locking seat set up at the side top of foot support pedestal, and foot support pedestal lower surface is equipped with roller train II, and on the guide rail on the bottom plate was connected to the roller train.

Furthermore, the steel ball locking seat consists of a steel ball locking seat body, an adjustable handle, a left locking block, a right locking block, a nut seat, a spring and a screw rod; a ball socket is arranged right above the steel ball locking seat body, a convex chute is processed on the side surface and used for positioning a left locking block and a right locking block, the matching part of the left locking block and the right locking block with the steel ball is of a crescent structure, and acting force is simultaneously applied to the steel ball in the axial direction of the screw rod and the sinking direction of the ball socket; the inner hole of the nut seat is of a double-thread structure; the spring is arranged between the left locking block and the right locking block.

Furthermore, the needle holder is provided with two sets which are respectively fixedly connected in the slotted hole at the uppermost end of the U-shaped structure of the clamping arm.

Furthermore, the roller group II is the same as the roller group I in structure, and consists of 2 positioning roller groups and 2 aligning roller groups which are respectively positioned at two sides of the guide rail; the roller set II and the roller set I are respectively composed of a roller with a V-shaped groove, a bearing, an installation shaft, a limiting nut and a locknut; wherein, the bearing is in interference fit with the mounting shaft and is fixed by a locknut.

Furthermore, the needle holder is fixed on the top end of the clamping arm, the bottom of the clamping arm is connected to a lifting shaft of the lifting rod, the lifting shaft penetrates through the locking nut and is connected to the upper surface of the lifting rod seat body through the lifting fixing seat, and the lower surface of the lifting rod seat body is connected to a guide rail of the bottom plate through the roller set I.

Furthermore, the foot support is connected to the foot support seat body through the steel ball locking seat, and the lower surface of the foot support seat body is connected with the guide rail on the bottom plate in a sliding mode through the roller train II.

Further, the foot supports are integrally processed by aluminum alloy; the cotton pad can be laid inside in the operation, with not unidimensional foot with the foot holds in the palm the laminating, and the side is in the same place with the parcel of restraint area with foot and foot support.

According to the technical scheme, the leg fixing device in the knee joint operation is provided, the plate body is of the 'common' structure, the contact area of the plate body with an operating bed is increased, the stability of the leg fixing support is improved, and the plate body is convenient to fix the leg outside and the foot inside. Moreover, if the patient needs to replace the left and right knee joints, the position of the patient is not changed in the operation, and the patient can translate to the lower part of the leg after turning the horizontal plane of the bottom plate for 180 degrees, so that the flexibility and the convenience are improved. The bottom plate is of an inverted V-shaped cross section, so that the guide rail is stable and reliable in positioning. The double-V-shaped guide rail ensures smooth guide of the roller and convenient disassembly and assembly of the sliding seat, and meets the requirement of resisting the transverse cutting force generated by the saw blade. The cardan shaft can rotate in a large taper range, quickly align a fastening position and effectively fasten. The upright posts on two sides of the clamping arm are of hollow structures, so that the weight is reduced, the rigidity is improved, and the three absorb vibration. The manual labor is liberated, the fixation is firm, and the visual field of a doctor is widened. Is beneficial to the operation.

Drawings

In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without any creative effort.

FIG. 1 is a schematic view of a leg immobilization device for use in knee joint surgery according to the present application;

FIG. 2 is a block diagram of a base plate of a leg immobilization device in knee joint surgery according to the present application;

FIG. 3 is a cross-sectional view of a base plate of a leg immobilization device in knee joint surgery according to the present application;

FIG. 4 is a block diagram of a lifter bar of a leg rest for knee joint surgery according to the present application;

FIG. 5 is a structural view of the seat of the lift pin of FIG. 4 of the present application;

FIG. 6 is a structural diagram of a roller set II and a roller set I in a leg fixing device in knee joint surgery according to the present application;

FIG. 7 is a structural diagram of the tensioning sleeve of the lifting rod fixing seat in FIG. 4;

FIG. 8 is a structural view of a locking handle II and a locking handle I in a leg fixing device in knee joint surgery according to the present application;

FIG. 9 is a block diagram of a clamp arm in a leg rest for knee surgery according to the present application;

FIG. 10 is a view showing the configuration of a needle holder of a leg fixing device in knee joint surgery according to the present application;

FIG. 11 is a block diagram of a footrest apparatus in a leg fixing apparatus in knee joint surgery according to the present application;

FIG. 12 is a view showing the structure of a stand body of a leg fixing device in knee joint surgery according to the present application;

FIG. 13 is a block diagram of a foot rest of a leg immobilization device in knee joint surgery according to the present application;

FIG. 14 is a block diagram of a steel ball locking socket in a leg immobilization device in knee joint surgery according to the present application.

Detailed Description

The application provides a leg fixing device in knee joint surgery, which comprises a bottom plate 1, a lifting rod 2, a clamping arm 3, a needle holder 4 and a foot rest device 5 as shown in figure 1;

as shown in fig. 2 and 3, the bottom plate 1 is composed of a plate body 11 and a guide rail 12, the bottom plate is composed of a plate body and a guide rail, the plate body is of a 'common' structure, the plate body is matched with the guide rail by adopting short taper 15, a screw 13 is connected with the guide rail from the bottom surface of the plate body, and the guide rail is of a double-V-shaped cross section 14;

as shown in fig. 4, the lifting rod includes a lifting rod seat body 25, a roller group i 26, a lifting rod fixing seat 24, a locking nut 22, a lifting shaft 21, and a locking handle i 23, as shown in fig. 5, the lifting rod fixing seat 24 is installed on an upper layer 251 of the lifting rod seat body, the roller group i 26 is installed on a lower layer 252 of the lifting rod seat body, as shown in fig. 6, the roller group i is composed of 2 sets of positioning roller groups and 2 sets of aligning roller groups, and is respectively located on two sides of the guide rail; the lifting rod fixing seat is provided with a lock nut 22, a tensioning sleeve and a lifting shaft 21; the lock nut 22 is in threaded connection with the lifting rod fixing seat 24, as shown in fig. 7, the tensioning sleeve is divided into an inner ring and an outer ring, the inner ring and the outer ring are in taper fit, and a through groove is axially formed in the inner ring 242; the outer ring 241 is fixedly connected with the lifting rod fixing seat 24, and the inner ring 242 is connected with the lifting shaft 21 in a sliding manner;

as shown in fig. 8, the locking handle 23 is composed of an adjustable handle 231, a screw 232, a copper nut 233 and a jackscrew 234, the adjustable handle 231 is connected to the top end of the screw 232, the bottom end of the screw 232 is in threaded connection with the lower layer 252 of the lifting rod seat body, grooves for placing the adjustable handle are arranged on two sides of the lifting rod seat body 25, and the copper nut 233 is fastened to the end surface of the screw 232 by the fixed screw 234;

as shown in fig. 9, the clamping arm 3 is of a U-shaped structure, the uppermost ends of two sides of the U-shape are provided with long round holes 31, and the side walls of two sides of the U-shape are provided with through grooves 32 in the vertical direction;

as shown in fig. 10, the needle holder 4 is composed of a needle holder fixing seat 42, a rotating shaft 41, a tightening wheel 47, a universal shaft 45, a needle locking wheel 46, a positioning wheel 43 and a limit screw 44; the needle holder fixing seat is of a hinge structure consisting of a needle holder fixing seat body 42, a rotary seat body 48 and a rotary shaft 41; the rotating shaft is arranged in the long round hole 31 on the clamping arm and is connected with the rotating shaft 41 through a tensioning wheel 47, and the rotating shaft 41 is fixed on the needle holder fixing seat body 42; the universal shaft 45 is arranged at the joint of the needle holder fixing seat 42 and the rotary seat body 48, is of a hollow structure, and is provided with a cross groove at the shaft end; the needle locking wheel 46 is in threaded connection with the universal shaft 45 and is matched with the universal shaft in a long taper way; the positioning wheel 43 is arranged on the rotary seat body 48, the rotary seat body 48 is extruded by utilizing the lever principle so as to clamp the universal shaft 45, and the limit screw 44 is arranged on the rotary seat body 48;

as shown in fig. 11 and 12, the foot rest device 5 is composed of a foot rest base body 52, a foot rest 51, a roller set ii 54, a locking handle ii 55, and a steel ball locking base 53, wherein the locking handle ii 55 and the locking handle i 23 have the same structure, the foot rest base body 52 is connected to the foot rest 51 through the steel ball locking base 53, the steel ball locking base 53 is disposed at the top of the side surface of the foot rest base body 52, the foot rest base body is divided into a foot rest base body upper layer 521 and a foot rest base body lower layer 522, the foot rest base body upper layer 521 is connected to the foot rest base body 522 through a screw 253, the foot rest base body lower layer 522 is provided with the roller set ii 54, and the roller set ii 54 is connected to the guide rail 12 on the base plate 1.

As shown in fig. 13 and 14, the steel ball locking seat 53 is further composed of a steel ball locking seat body 534, an adjustable handle 241, a left locking block 531, a right locking block 531, a nut seat 533, a spring 532 and a screw 232; a ball socket 535 is arranged on the right side of the steel ball locking seat body, a convex chute is processed on the side surface of the steel ball locking seat body and is used for positioning a left locking block and a right locking block, the matching part of the left locking block and the right locking block with the steel ball is of a crescent structure, acting force is simultaneously applied to the steel ball 511 in the axial direction of a screw rod and the sinking direction of the ball socket, and the steel ball 511 is arranged at the rear position of a foot of the foot rest; the inner hole of the nut seat is of a double-thread structure; the spring is arranged between the left locking block and the right locking block.

Furthermore, the needle holder is provided with two sets which are respectively and fixedly connected with the uppermost end of the U-shaped structure of the clamping arm.

Furthermore, the roller group II is the same as the roller group I in structure, and consists of 2 positioning roller groups and 2 aligning roller groups which are respectively positioned at two sides of the guide rail; the roller set II and the roller set I are respectively composed of a roller with a V-shaped groove, a bearing, an installation shaft, a limiting nut and a locknut; the roller is fixedly connected with the bearing through a limiting nut, and the mounting shaft penetrates through the bearing and is fixed through a check nut.

Furthermore, the needle holder is fixed at the top end of the clamping arm, the bottom of the clamping arm is connected to a lifting shaft of the lifting rod, the lifting shaft penetrates through the locking nut and is connected to the upper surface of the lifting rod seat body through a lifting fixing seat, and the lower surface of the lifting rod seat body is connected to a guide rail of the bottom plate through a roller set I.

Furthermore, the foot support is connected to the foot support seat body through the steel ball locking seat, and the lower surface of the foot support seat body is connected with the guide rail on the bottom plate in a sliding mode through the roller train II.

Further, the foot supports are integrally processed by aluminum alloy; the cotton pad can be laid inside in the operation, with not unidimensional foot with the foot holds in the palm the laminating, and the side is in the same place with the parcel of restraint area with foot and foot support.

According to the technical scheme, the leg fixing device in the knee joint operation is provided, the plate body is of the 'common' structure, the contact area of the plate body with an operating bed is increased, the stability of the leg fixing support is improved, and the plate body is convenient to fix the leg outside and the foot inside. Moreover, if the patient needs to replace the left and right knee joints, the position of the patient is not changed in the operation, and the patient can translate to the lower part of the leg after turning the horizontal plane of the bottom plate for 180 degrees, so that the flexibility and the convenience are improved. The bottom plate is of an inverted V-shaped cross section, so that the guide rail is stable and reliable in positioning. The double-V-shaped guide rail ensures smooth guide of the roller and convenient disassembly and assembly of the sliding seat, and meets the requirement of resisting the transverse cutting force generated by the saw blade. The cardan shaft can rotate in a large taper range, quickly align a fastening position and effectively fasten. The upright posts on two sides of the clamping arm are of hollow structures, so that the weight is reduced, the rigidity is improved, and the three absorb vibration. The manual labor is liberated, the fixation is firm, and the visual field of a doctor is widened. Is beneficial to the operation.

Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.

Claims (7)

1. A leg fixation device in knee joint surgery, comprising: the device comprises a bottom plate, a lifting rod, a clamping arm, a needle holder and a foot rest device, wherein the bottom plate is provided with a groove;

the bottom plate consists of a plate body and a guide rail, the plate body is of a 'common' structure and is in short taper fit with the guide rail, the screw is connected with the guide rail from the bottom surface of the plate body, and the guide rail is of a double-V-shaped cross section;

the lifting rod comprises a lifting rod base body, a roller set I, a lifting rod fixing base, a locking nut, a lifting shaft and a locking handle I, wherein the lifting rod fixing base is installed on the upper surface of the base body, the roller set is installed on the lower surface of the lifting rod base body, and the roller set I consists of 2 positioning roller sets and 2 aligning roller sets and is respectively positioned on two sides of the guide rail; the lifting rod fixing seat is provided with a lock nut, a tensioning sleeve and a lifting shaft; the lock nut is in threaded connection with the lifting rod fixing seat, the tensioning sleeve is divided into an inner ring and an outer ring, the inner ring and the outer ring are in taper fit, and a through groove is axially formed in the inner ring; the outer ring is fixedly connected with the lifting rod fixing seat, and the inner ring is connected with the lifting shaft in a sliding manner;

the locking handle consists of an adjustable handle, a screw rod, a copper nut and a jackscrew, the adjustable handle is connected to the top end of the screw rod, the bottom end of the screw rod is in threaded connection with the lower layer of the lifting rod seat body, grooves for placing the adjustable handle are formed in two sides of the lifting rod seat body, and the copper nut is fastened on the end face of the screw rod through a fixed screw;

the clamping arm is of a U-shaped structure, the uppermost ends of two sides of the U shape are provided with long round holes, and through grooves are formed in the vertical direction of two side walls of the U shape;

the needle holder consists of a needle holder fixing seat, a rotating shaft, a tensioning wheel, a universal shaft, a needle locking wheel, a positioning wheel and a limiting screw; the needle holder fixing seat is of a hinge structure consisting of a needle holder fixing seat, a rotary seat body and a rotary shaft; the rotating shaft is arranged in a long round hole on the clamping arm and is connected with the rotating shaft through a tensioning wheel, and the rotating shaft is fixed on the needle holder fixing seat body; the universal shaft is arranged at the joint of the needle holder fixing seat body and the rotary seat body, is of a hollow structure, and the shaft end is provided with a cross groove; the lock pin wheel is in threaded connection with the universal shaft and is matched with the universal shaft in a long taper way; the positioning wheel is arranged on the rotary seat body, the rotary seat body is extruded by utilizing the lever principle so as to clamp the universal shaft, and the limiting screw is arranged on the rotary seat body;

the foot holds in the palm the device by foot support pedestal, foot rest, roller train II, locking handle II, steel ball locking seat are constituteed, wherein locking handle II with locking handle I's structure is the same, and the foot support pedestal passes through steel ball locking seat and connects the foot rest, steel ball locking seat set up at the side top of foot support pedestal, and foot support pedestal lower surface is equipped with roller train II, and the roller train is connected on the guide rail on the bottom plate.

2. The leg fixing device in knee joint surgery according to claim 1, wherein the steel ball locking seat is composed of a steel ball locking seat body, an adjustable handle, a left locking block, a right locking block, a nut seat, a spring and a screw rod; a ball socket is arranged right above the steel ball locking seat body, a convex chute is processed on the side surface and used for positioning a left locking block and a right locking block, the matching part of the left locking block and the right locking block with the steel ball is of a crescent structure, and acting force is simultaneously applied to the steel ball in the axial direction of the screw rod and the sinking direction of the ball socket; the inner hole of the nut seat is of a double-thread structure; the spring is arranged between the left locking block and the right locking block.

3. The leg fixing device in knee joint surgery according to claim 1, wherein the needle holder is provided with two sets, and the two sets are respectively fixedly connected in the long round hole at the uppermost end of the U-shaped clamping arm.

4. The leg fixing device in knee joint surgery according to claim 1, wherein the roller group II is the same in structure as the roller group I, and is composed of 2 sets of positioning roller groups and 2 sets of aligning roller groups, which are respectively located at two sides of the guide rail; the roller set II and the roller set I are respectively composed of a roller with a V-shaped groove, a bearing, an installation shaft, a limiting nut and a locknut; wherein, the gyro wheel passes through stop nut and bearing fixed connection, bearing and installation axle interference fit to it is fixed through locknut.

5. The leg fixing device in knee joint surgery as claimed in claim 1, wherein the needle holder is fixed on the top end of the clamping arm, the bottom of the clamping arm is connected with the lifting shaft of the lifting rod, the lifting shaft passes through the locking nut and is connected on the upper surface of the lifting rod seat body through the lifting fixing seat, and the lower surface of the lifting rod seat body is connected on the guide rail of the bottom plate through the roller set I.

6. The leg fixing device for knee joint operation as claimed in claim 1, wherein the foot rest is connected to the foot rest base body through the steel ball locking base, and the lower surface of the foot rest base body is slidably connected to the guide rail on the base plate through a roller set ii.

7. The leg fixing device in knee joint surgery according to claim 1, wherein the foot rest is integrally machined from an aluminum alloy; the cotton pad can be laid inside in the operation, with not unidimensional foot with the foot holds in the palm the laminating, and the side is in the same place with the parcel of restraint area with foot and foot support.

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