CN216495595U

CN216495595U - Distractor for old fracture

Info

Publication number: CN216495595U
Application number: CN202120984735.8U
Authority: CN
Inventors: 岳柏林; 苏踊跃; 吴雪君; 韩公斌
Original assignee: 920th Hospital of the Joint Logistics Support Force of PLA
Current assignee: 920th Hospital of the Joint Logistics Support Force of PLA
Priority date: 2021-05-10
Filing date: 2021-05-10
Publication date: 2022-05-13
Anticipated expiration: 2031-05-10

Abstract

The utility model discloses a distractor used in old fracture, which is characterized by comprising the following components: the screw rod, the first fixed end and the second fixed end; the first fixed end and the second fixed end are respectively and movably connected to two ends of the screw rod; the left end of the screw rod is provided with left-handed threads, and the right end of the screw rod is provided with right-handed threads; the first fixed end and the second fixed end are respectively and movably connected to two ends of the screw rod through thread matching; the first fixed end is divided into a cylindrical sleeve and a middle fixed block; the threaded hole at the inner part of the cylindrical sleeve is integrally rectangular and blocky, the middle fixing block is provided with a through hole, and the two sides of the through hole are provided with semi-arc grooves. The distractor can replace hands to draw and distract two bones of an old fracture, and can continuously apply even force, so that the work load of medical workers is reduced, the drawing and distraction quality of the whole bones is ensured, and the stable operation is ensured.

Description

Distractor for old fracture

Technical Field

The utility model belongs to the technical field of medical instruments, and particularly relates to a distractor for old fracture.

Background

Old fracture is generally determined according to fracture healing, the fracture within three weeks is generally fresh fracture, the fracture after three weeks is called old fracture, and the old fracture mainly refers to the aspects of abnormal healing, delayed healing and nonhealing of the fracture. The abnormal healing mainly refers to the poor alignment of the proximal and distal ends of the fracture healing part, or the abnormal connection of angulation, rotation and overlapping, which mostly causes poor restitution, or inaccurate fixation, or premature inferior movement of the patient, thus causing the displacement of the fracture. Delayed healing means that although the fracture is treated and fixed for a certain period of time, the formed callus can not firmly connect the broken ends together, or the callus growth at the fracture end is delayed. Nonunion is called fracture nonunion, which is called nonunion, mainly because the fracture line is clear after eight months at the fracture end and no obvious callus grows.

If the cases occur in childhood (not more than 12-13 years old), the deformity can be corrected by self in the later development process without treatment for the mild cases. But if the deformity is serious and affects the function of the limbs, it is suitable for early treatment regardless of the age of the patient. Generally, in the case of about three months after injury, the fractured ends of the fracture are healed but not firm, the operation can be performed under anesthesia, the fractured ends which are deformed and healed are re-broken, the old fracture is changed into fresh fracture, and then the operation can be performed again according to the fresh fracture. If the time of injury exceeds half a year, the fracture healing is very strong and cannot be broken by manipulations, so it is better to consider surgical treatment.

At present, the following defects exist in the operation for treating old fracture:

in the operation, the traction, the lifting, the recombination and the locking of the bone at the fracture part are all completed by the bare hands of medical personnel, the whole process is time-consuming and labor-consuming, the effect is not good, and no matter the patient or the medical personnel are all burdened greatly.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems, the utility model designs the distracter for old fracture, which can replace hands to draw and distract two bones at the old fracture and can continuously apply uniform force, thereby reducing the work load of medical workers, avoiding the need of bare-handed drawing in the operation process, ensuring the quality of drawing and distraction of the whole bones, improving the operation quality, reducing the operation risk and relieving the pain of patients in the operation on the premise of ensuring the stable operation; meanwhile, the device adopts the positive and negative thread fit, the traction and the distraction of the whole device can be realized by rotating the screw rods in different directions, the operation is simple and convenient, the device is used in the operation, the operation efficiency is improved, the workload of medical staff is reduced, and the medical staff can distribute more energy and concentrate on important matters; in addition, the mode that the device and skeleton relatively fixed is steel nail screw in skeleton, and device tractive steel nail is in order to realize the tractive to the skeleton, and fixed mode is simple, easy operation, and the hand of going up the degree of difficulty is low, and is little to the human damage, has promoted the quality and the efficiency of operation.

In order to achieve the technical effects, the utility model is realized by the following technical scheme: a distractor for use in old fractures, comprising: the screw rod, the first fixed end and the second fixed end;

the first fixed end and the second fixed end are respectively and movably connected to two ends of the screw rod;

furthermore, the screw rod is divided into a left screw rod, a right screw rod and a middle rotating shaft, and the left screw rod and the right screw rod are respectively and fixedly connected to two ends of the middle rotating shaft;

further, the middle rotating shaft is in a hexagonal cylinder shape;

furthermore, the left screw thread is a left-hand screw thread, and the right screw thread is a right-hand screw thread; the first fixed end and the second fixed end are respectively and movably connected to the left screw rod and the right screw rod through thread matching;

furthermore, the first fixed end is divided into a cylindrical sleeve and a middle fixed block; the inner part of the cylindrical sleeve is provided with a threaded hole, the middle fixing block is integrally rectangular and blocky, the middle part of the cylindrical sleeve is provided with a through hole, and two sides of the cylindrical sleeve are provided with semi-arc grooves;

furthermore, the second fixed end is the same as the first fixed end in structural shape, and the difference is that the thread of the threaded hole of the first fixed end is left-handed, the thread of the threaded hole of the second fixed end is right-handed, and through the matching of the threaded hole, the left screw rod and the right screw rod, the first fixed end is movably connected to the left screw rod, and the second fixed end is movably connected to the right screw rod;

the utility model has the beneficial effects that:

1. the distracter can replace hands to draw and distract two bones at an old fracture part, and can continuously apply uniform force, so that on one hand, the work load of medical personnel is reduced, the drawing by bare hands is not needed in the operation process, on the other hand, the drawing and distraction quality of the whole bones is ensured, the operation quality is improved on the premise of ensuring the stable operation, the operation risk is reduced, and the pain of a patient in the operation is also reduced;

2. the device adopts the positive and negative thread fit, can realize the traction and the distraction of the whole device by rotating the screw rods in different directions, has simple and convenient operation, is used in the operation, improves the efficiency of the operation, reduces the workload of medical personnel, and ensures that the medical personnel can distribute more energy to concentrate on important matters;

3. the mode that the device and skeleton relatively fixed is steel nail screw in skeleton, and device tractive steel nail is in order to realize the tractive to the skeleton, and fixed mode is simple, easy operation, and the hand of the expert degree of difficulty is low, and is little to the human damage, has promoted the quality and the efficiency of operation.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view showing the overall construction of a distractor for use in old fractures;

FIG. 2 is a schematic view of the screw rod and its attachment structure of a distractor used in old fracture;

FIG. 3 is a schematic view of a first fixation end of a distractor and its attachment structure for use in old fractures;

FIG. 4 is a cross-sectional view of the first fixation end A-A of the distractor used in old fracture;

in the drawings, the components represented by the respective reference numerals are listed below:

1-screw rod, 101-left screw rod, 102-right screw rod, 103-middle rotating shaft, 2-first fixing end, 201-cylindrical sleeve, 2011-threaded hole, 202-middle fixing block, 2021-semi-circular arc groove, 2022-through hole and 3-second fixing end.

Detailed Description

The technical solutions in the embodiments of the present invention will be 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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.

Examples

Referring to fig. 1 to 4, a distractor for old fracture, comprising: the screw rod comprises a screw rod 1, a first fixed end 2 and a second fixed end 3;

the first fixed end 2 and the second fixed end 3 are respectively and movably connected to two ends of the screw rod 1; the distracter can replace hands to draw and distract two bones at an old fracture part, and can continuously apply uniform force, so that on one hand, the work load of medical personnel is reduced, the drawing by bare hands is not needed in the operation process, on the other hand, the drawing and distraction quality of the whole bones is ensured, the operation quality is improved on the premise of ensuring the stable operation, the operation risk is reduced, and the pain of a patient in the operation is also reduced;

further, the screw rod 1 is divided into a left screw 101, a right screw 102 and a middle rotating shaft 103, the left screw 101 and the right screw 102 are respectively and fixedly connected to two ends of the middle rotating shaft 103, and the middle rotating shaft 103 drives the left screw 101 and the right screw 102 to rotate;

furthermore, the whole middle rotating shaft 103 is hexagonal cylinder-shaped, so that a hexagonal wrench can be conveniently and directly used for rotating the middle rotating shaft, and a force application foundation is provided for the opening and tightening of the whole device;

further, the thread of the left screw 101 is a left-hand thread, and the thread of the right screw 102 is a right-hand thread; the first fixed end 2 and the second fixed end 3 are respectively and movably connected to the left screw 101 and the right screw 102 through thread matching; the device adopts the positive and negative thread matching, can realize the traction and the distraction of the whole device by rotating the screw rod 1 to different directions, has simple and convenient operation, is used in the operation, improves the efficiency of the operation, reduces the workload of medical personnel, and ensures that the medical personnel can distribute more energy to concentrate on important matters;

further, the first fixed end 2 is divided into a cylindrical sleeve 201 and a middle fixed block 202; the inner part of the cylindrical sleeve 201 is provided with a threaded hole, the middle fixing block 202 is integrally rectangular and blocky, the middle part is provided with a through hole 2022, and the two sides of the through hole are provided with semi-circular arc grooves 2021; the through hole 2022 is arranged for the steel needle to pass through, and can apply force to the steel needle horizontally and oppositely, and the semi-circular arc groove 2021 applies force unidirectionally; because the steel needle is driven into the bones at two ends of the old fracture, the steel needle can be pulled to realize the traction, expansion, contraction and compaction of the bones by applying force to the steel needle; namely, the through hole 2022 of the first fixing end 2 can realize the traction and the extrusion of the old fracture, and the semi-circular arc groove 2021 can only singly realize the traction or the extrusion of the old fracture; the two modes are practical, and the solution to complex conditions in clinic is enriched;

further, the second fixed end 3 has the same structural shape as the first fixed end 2, and the difference is that the thread of the threaded hole 2011 of the first fixed end 2 is left-handed, the thread of the threaded hole of the second fixed end 3 is right-handed, and through the matching of the threaded hole 2011 with the left screw 101 and the right screw 102, the first fixed end 2 is movably connected to the left screw 101, and the second fixed end 3 is movably connected to the right screw 102;

the specific using method of the device comprises the following steps:

1. the whole device is sterilized first.

2. And (4) driving steel nails to proper positions on bones at two ends of the old fracture.

3. The positions of the first fixed end 2 and the second fixed end 3 are adjusted, and the steel nails are inserted into through holes of the middle fixed blocks or are clamped into semi-arc grooves on two sides of the middle fixed blocks.

4. The screw rod 1 is rotated by clamping the middle rotating shaft 103 of the main screw rod 1 by a hexagonal wrench.

5. The rotating direction of the screw rod 1 is changed to realize the traction and the expansion of the whole device.

In conclusion, the distractor can replace hands to draw and distract two bones at an old fracture part, and can continuously apply uniform force, so that the work load of medical workers is reduced, the drawing by hands is not needed in the operation process, the drawing and distraction quality of the whole bones is ensured, the operation quality is improved on the premise of ensuring the stable operation, the operation risk is reduced, and the pain of a patient in the operation is relieved;

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the utility model disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the utility model to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best utilize the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A distractor for use in old fractures, comprising: the screw rod, the first fixed end and the second fixed end;

the left end of the screw rod is provided with left-handed threads, and the right end of the screw rod is provided with right-handed threads; the first fixed end and the second fixed end are respectively and movably connected to two ends of the screw rod through thread matching;

the first fixed end is divided into a cylindrical sleeve and a middle fixed block; the middle fixing block is integrally rectangular and blocky, a through hole is formed in the middle of the middle fixing block, and semicircular arc grooves are formed in two sides of the middle fixing block;

the screw rod is divided into a left screw rod, a right screw rod and a middle rotating shaft, and the left screw rod and the right screw rod are respectively and fixedly connected to two ends of the middle rotating shaft.

2. The distractor of claim 1, wherein the central shaft is generally hexagonal.

3. The distractor of claim 1, wherein the second fixation end is of the same shape as the first fixation end except that the first fixation end has a left-handed threaded hole and the second fixation end has a right-handed threaded hole, and the first fixation end is movably connected to the left screw and the second fixation end is movably connected to the right screw by the engagement of the threaded holes with the left screw and the right screw.