Distal femoral osteotomy device and method

Abstract

The present invention discloses a distal femoral osteotomy device and method, belonging to the technical field of medical devices. A distal femoral osteotomy device includes an oscillating saw for cutting, and a fixed seat for guiding the oscillating saw, and also includes: at least one set of guide seats, which are detachably arranged on the fixed seat, and a guide groove is provided on the guide seat, and the output end of the oscillating saw is swingably arranged in the guide groove; a nozzle for flushing the incision is arranged on one end of the guide seat facing the incision, and the output end of the liquid supply part is connected to the nozzle; the present invention is provided with a guide seat on the fixed seat, and a nozzle is swingably arranged on the guide seat, which can not only flush and cool the incision, but also flush and cool the surface of the cutting saw blade, which can effectively reduce the temperature of the incision and the saw blade, reduce thermal damage, improve bone healing and reduce the risk of infection, and can also appropriately flush the bone tissue produced by cutting during the flushing process, reduce the subsequent cleaning time, and improve the efficiency of the operation.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a distal femoral osteotomy device and method. Background Art

[0002] Distal femoral osteotomy is a procedure used to correct knee malalignment or treat certain types of knee disease. This procedure is often performed on young, active patients to delay or avoid the need for total knee replacement. During surgery, an electric oscillating saw (also called an oscillating saw or reciprocating saw) is generally used to cut the osteotomy line. In order to ensure the accuracy and consistency of the cutting position, a guide device is usually used to limit and guide the electric oscillating saw to reduce surgical errors.

[0003] In the prior art, the oscillating saw will inevitably generate heat during the cutting process. The heat will not only cause thermal damage to the cut surface, affect bone healing and increase the risk of infection, but also the high temperature will make part of the bone tissue dry and easily break into powder, producing more bone chips and bone powder. These fine particles will affect the clarity of the surgical field, causing the progress of the operation to slow down and affecting the use effect. Summary of the invention

[0004] The purpose of the present invention is to solve the problems in the prior art that the heat generated by the saw blade during the cutting process will have an adverse effect on the cut surface and the bone chips and bone powder generated during the cutting process will affect the surgical field of view, and to propose a distal femoral osteotomy device and method.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A distal femoral osteotomy device includes an oscillating saw for cutting and a fixed seat for guiding the oscillating saw, and also includes: at least one set of guide seats, which are detachably arranged on the fixed seat, and the guide seat is provided with a guide groove, and the output end of the oscillating saw is swung and arranged in the guide groove; a nozzle for flushing the incision is arranged on one end of the guide seat facing the incision, and the guide seat is provided with a liquid supply part, and the output end of the liquid supply part is connected to the nozzle.

[0007] In order to facilitate the provision of physiological saline to the nozzle, preferably, the liquid supply part includes a liquid inlet pipe, a storage cavity is opened in the guide seat, one end of the liquid inlet pipe is connected to the storage cavity, and a liquid discharge pipe is fixedly provided at the other end of the storage cavity, and the liquid discharge pipe is connected to the nozzle input end.

[0008] In order to reduce the friction between the saw blade and the inner wall of the guide groove, further, multiple groups of rotating rollers are arranged in the storage cavity, and rotating shafts are fixedly arranged at both ends of the multiple groups of rotating rollers. The rotating shafts are rotatably arranged in the guide seat, and the side walls of the rotating rollers extend into the guide groove, and the two ends of the swing saw cutting blade are respectively against the rotating rollers.

[0009] In order to further reduce friction and appropriately cool the saw blade, two groups of oil drain grooves are further provided on the side wall of the rotating roller. Both groups of oil drain grooves are spiral structures, and the two groups of oil drain grooves rotate in opposite directions.

[0010] Furthermore, a rotating plate is fixedly provided at one end of the guide seat, a rotating shaft is fixedly provided on the outer wall of the nozzle, the rotating shaft is rotatably provided on the rotating plate, and a driving part for driving the nozzle to rotate is provided in the guide seat.

[0011] Further, the driving part includes a connecting plate fixedly arranged on the outer wall of the nozzle, a piston cavity is opened in the guide seat, a piston plate is slidably arranged in the piston cavity, a screw rod is fixedly arranged at one end of the piston plate, one group of the inner walls of the rotating shaft are fixedly arranged with a threaded sleeve, the screw rod is threadedly connected with the threaded sleeve, and a sliding plate is fixedly arranged at the other end of the piston plate, an arc groove is opened on the sliding plate, and a light rod is fixedly arranged on the connecting plate, and the light rod is slidably arranged in the arc groove.

[0012] Furthermore, it also includes a storage ball for storing coagulant, which is arranged in the storage cavity, and a flexible tube is fixedly arranged on the storage ball, and the end of the flexible tube away from the storage ball is fixedly connected to the inner wall of the storage cavity, and a first pipe and a second pipe are fixedly arranged on the piston cavity, the first pipe is connected to the flexible pipe, and the second pipe is connected to the drain pipe, and both the first pipe and the second pipe are fixedly provided with a one-way valve, and the guide seat is provided with a liquid adding pipe connected to the flexible pipe.

[0013] Preferably, two groups of guide seats are provided, and limiting grooves are provided on the fixed seats. Limiting seats are fixedly provided on the two groups of guide seats, and the limiting seats are slidably provided in the limiting grooves. Positioning holes are provided at both ends of the fixed seats.

[0014] Furthermore, the fixed seat is an arc-shaped structure, and an angle scale line is fixedly set on the fixed seat. A threaded hole is opened on the guide seat, and a first screw is threadedly connected to the fixed seat. One group of the guide seats is threadedly connected to the first screw, and an adjustment groove is opened on the fixed seat, and a second screw is slidably set in the adjustment groove, and another group of the guide seats is threadedly connected to the second screw.

[0015] A method for a distal femoral osteotomy device further comprises the following steps:

[0016] Step 1: Select a suitable guide seat and fix it on the fixed seat according to the cutting angle;

[0017] Step 2: insert a Kirschner wire into the femur, and then install and fix the fixing seat on the Kirschner wire so that it is located in the positioning hole respectively;

[0018] Step 3: Use an oscillating saw to cut with the saw blade located in the guide groove, and spray physiological saline on the incision position and the saw blade through a nozzle.

[0019] Compared with the prior art, the present invention provides a distal femoral osteotomy device and method, which have the following beneficial effects:

[0020] 1. The distal femoral osteotomy device is provided with a guide seat on the fixed seat, and a nozzle is swingably provided on the guide seat, which can not only flush and cool the incision, but also flush and cool the surface of the cutting saw blade. On the one hand, it can effectively reduce the temperature of the incision and the saw blade, reduce thermal damage, improve bone healing and reduce the risk of infection. On the other hand, during the flushing process, the bone tissue produced by the cutting can be properly flushed, which reduces the subsequent cleaning time and improves the efficiency of the operation.

[0021] 2. The distal femoral osteotomy device has a storage cavity in the guide seat, and a rotating roller is rotatably arranged in the storage cavity, which can reduce the friction between the saw blade and the inner walls of both sides of the guide groove during the swinging process, which helps to reduce wear. In addition, an oil drain groove connected to the storage cavity is provided on the rotating roller, and a small part of physiological saline will enter the guide groove through the oil drain groove, which can not only cool the surface of the saw blade, but also has a certain lubrication effect, thereby improving the use effect.

[0022] 3. The distal femoral osteotomy device has a storage ball in the storage chamber, in which a coagulant is stored. When the piston plate slides back and forth in the piston chamber, the coagulant in the storage ball can be drawn out through the first pipe and the flexible tube, and then transported to the drainage pipe through the second pipe to mix with the physiological saline entering the nozzle, and then sprayed toward the incision position, so that the physiological saline has a certain hemostatic effect. In addition, the rotating roller will cause irregular shaking of the liquid in the storage chamber during the reciprocating rotation, thereby shaking the storage ball, and properly shaking the coagulant in the storage ball, reducing the occurrence of precipitation and improving the use effect.

[0023] The parts not involved in the device are the same as the prior art or can be implemented by the prior art. The present invention provides a guide seat on the fixed seat, and a nozzle is swingably provided on the guide seat, which can not only flush and cool the incision, but also flush and cool the surface of the cutting saw blade. On the one hand, it can effectively reduce the temperature of the incision and the saw blade, reduce thermal damage, improve bone healing and reduce the risk of infection. On the other hand, during the flushing process, the bone tissue produced by the cutting can be properly flushed, which can reduce the subsequent cleaning time and improve the efficiency of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the structure of a distal femoral osteotomy device proposed by the present invention Figure 1 ;

[0025] Figure 2 A schematic diagram of the structure of a distal femoral osteotomy device proposed by the present invention Figure 2 ;

[0026] Figure 3 A side view of a distal femoral osteotomy device proposed by the present invention;

[0027] Figure 4 A schematic structural diagram of a guide seat for a distal femoral osteotomy device proposed by the present invention;

[0028] Figure 5 A cross-sectional view of a guide seat of a distal femoral osteotomy device proposed by the present invention;

[0029] Figure 6 A distal femoral osteotomy device proposed by the present invention Figure 5 Enlarged view of part A.

[0030] In the figure: 1. fixing seat; 101. positioning hole; 102. limiting groove; 103. adjusting groove; 2. guide seat; 201. guide groove; 202. storage chamber; 203. liquid inlet pipe; 204. liquid discharge pipe; 205. rotating plate; 206. limiting seat; 3. nozzle; 301. connecting plate; 302. light rod; 4. piston chamber; 401. first pipeline; 402. second pipeline; 5. storage ball; 501. flexible pipe; 502. liquid adding pipe; 6. piston plate; 601. screw rod; 602. sliding plate; 603. arc groove; 7. rotating roller; 701. oil drain groove; 702. rotating shaft; 703. threaded sleeve; 8. first screw; 801. second screw. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0032] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. Example

[0033] Reference Figure 1-Figure 6 A distal femoral osteotomy device and method, comprising an oscillating saw for cutting, and a fixed seat 1 for guiding the oscillating saw, and also comprising: at least one set of guide seats 2, which are detachably arranged on the fixed seat 1, and a guide groove 201 is provided on the guide seat 2, and the output end of the oscillating saw is oscillated and arranged in the guide groove 201, that is, when in use, the cutting blade of the oscillating saw is located in the guide groove 201, and the inner walls on both sides of the guide groove 201 can limit the two end surfaces of the cutting blade of the oscillating saw, so that it cuts along the drawn osteotomy line, thereby improving the cutting accuracy; a spray for flushing the incision The nozzle 3 is arranged on one end of the guide seat 2 facing the incision. A liquid supply part is arranged on the guide seat 2. The output end of the liquid supply part is connected to the nozzle 3. When in use, the connecting tube liquid supply part supplies liquid to the nozzle 3. The liquid is preferably saline. Then the nozzle 3 can be sprayed toward the incision. On the one hand, the incision and the saw blade in the incision can be flushed, which can effectively reduce the temperature, reduce thermal damage, improve bone healing and reduce the risk of infection. On the other hand, during the flushing process, the bone tissue produced by the cutting can be properly flushed, which can reduce the subsequent cleaning time and improve the efficiency of the operation.

[0034] During use, by providing a guide seat 2 on the fixed seat 1 and a nozzle 3 swingingly provided on the guide seat 2, not only the incision can be rinsed and cooled, but also the surface of the cutting saw blade can be rinsed and cooled. On the one hand, the temperature of the incision and the saw blade can be effectively reduced, thermal damage can be reduced, bone healing can be improved and the risk of infection can be reduced. On the other hand, during the rinsing process, the bone tissue produced by the cutting can be properly rinsed, the subsequent cleaning time can be reduced, and the surgical efficiency can be improved. By providing a storage chamber 202 in the guide seat 2 and rotatably provided with a rotating roller 7 in the storage chamber 202, the friction between the saw blade and the inner walls on both sides of the guide groove 201 during the swinging process can be reduced, which helps to reduce wear. In addition, an oil drain groove 701 connected to the storage chamber 202 is provided on the rotating roller 7. A small amount of physiological saline will pass through the oil drain groove 701 into the guide groove 201, which can not only cool the surface of the saw blade, but also has a certain lubrication effect, thereby improving the use effect.

[0035] Reference Figure 1 , Figure 3-Figure 6Here, we design the liquid supply part to include a liquid inlet pipe 203, and the other end of the liquid inlet pipe 203 is connected to a liquid supply pump, preferably a peristaltic pump, which can reliably and continuously transport physiological saline to the liquid inlet pipe 203. A storage chamber 202 is opened in the guide seat 2, and one end of the liquid inlet pipe 203 is connected to the storage chamber 202. A discharge pipe 204 is fixedly arranged at the other end of the storage chamber 202, and the discharge pipe 204 is connected to the input end of the nozzle 3 through a hose. When in use, by opening the storage chamber 202 in the guide seat 2, the physiological saline enters the storage chamber 202 through the liquid inlet pipe 203 and then enters the nozzle 3 through the discharge pipe 204, and finally is sprayed to the incision position through the nozzle 3 to achieve flushing and cooling effects.

[0036] Reference Figure 2 , Figure 4-Figure 6 A plurality of groups of rotating rollers 7 are arranged in the storage cavity 202, and the number of the rotating rollers 7 is from two to ten groups, preferably five groups. A rotating shaft 702 is fixedly arranged at both ends of the plurality of groups of rotating rollers 7. The rotating shaft 702 is rotatably arranged in the guide seat 2, and the side wall of the rotating roller 7 is extended into the guide groove 201. That is to say, rotating rollers 7 are arranged on the inner walls on both sides of the guide groove 201, and the two end surfaces of the swing saw cutting blade are respectively abutted against the rotating rollers 7. When in use, the rotating rollers 7 are rotatably arranged in the guide groove 201, so that the friction between the saw blade and the inner walls on both sides of the guide groove 201 during the swinging process can be reduced, which helps to reduce wear and increase the service life.

[0037] Reference Figure 4-Figure 6 Two groups of oil drain grooves 701 are opened on the side wall of the rotating roller 7, and the two groups of oil drain grooves 701 are both spiral structures, and the two groups of oil drain grooves 701 are set in opposite directions. When in use, by opening two groups of oil drain grooves 701 with spiral structures and opposite directions on the side wall of the rotating roller 7, during the swinging process of the saw blade, the rotating roller 7 briefly rotates forwards and reverses, and then the physiological saline in the storage chamber 202 can continue to flow into the guide groove 201, thereby improving the cooling effect during use.

[0038] Reference Figure 3-Figure 6 A rotating plate 205 is fixedly provided at one end of the guide seat 2, and a rotating shaft is fixedly provided on the outer wall of the nozzle 3. The rotating shaft is rotatably provided on the rotating plate 205. The nozzle 3 is provided with multiple groups, preferably ten groups, which are respectively located on the end faces of the mouths of the guide grooves 201, and a driving part for driving the nozzle 3 to rotate is provided in the guide seat 2. When in use, the nozzle 3 is driven by the driving part to swing around the rotating shaft, which can not only flush and cool the incision position, but also flush and cool the end face of the saw blade, thereby improving the use effect.

[0039] Reference Figure 3-Figure 6The driving part can use a motor, a cylinder or other driving parts to drive the nozzle 3 to rotate around the rotating shaft. Here, we design the driving part as follows: a connecting plate 301 is fixedly arranged on the outer wall of the nozzle 3, a piston chamber 4 is opened in the guide seat 2, a piston plate 6 is slidably arranged in the piston chamber 4, a screw rod 601 is fixedly arranged at one end of the piston plate 6, a threaded sleeve 703 is fixedly arranged on the inner wall of one group of rotating shafts 702, the screw rod 601 is extended into the threaded sleeve 703 and is threadedly connected to the threaded sleeve 703, and a screw rod 601 is fixedly arranged at the other end of the piston plate 6. A sliding plate 602 is provided, an arc groove 603 is opened on the sliding plate 602, and a light rod 302 is fixedly provided on the connecting plate 301, and the light rod 302 is slidably set in the arc groove 603. When in use, the screw rod 601 and the piston plate 6 can be driven to slide back and forth in the piston chamber 4 through the threaded sleeve 703 by rotating the roller 7 during the reciprocating rotation. In the process of the piston plate 6 sliding with the sliding plate 602, the nozzle 3 can be driven to swing back and forth around the rotating axis through the cooperation of the arc groove 603 and the light rod 302, thereby increasing the spraying range of the nozzle 3.

[0040] Reference Figure 5 and Figure 6 A distal femoral osteotomy device also includes a storage ball 5 for storing a coagulant, which is arranged in a storage cavity 202. The coagulant can be fibrin glue or a thrombin mixture or adrenaline in suspension form. Here, we prefer adrenaline in suspension form. A flexible tube 501 is fixedly arranged on the storage ball 5, and one end of the flexible tube 501 away from the storage ball 5 is fixedly connected to the inner wall of the storage cavity 202. A first pipeline 401 and a second pipeline 402 are fixedly arranged on the piston cavity 4, and the first pipeline 401 is connected to the flexible tube 501. That is to say, the two ends of the flexible tube 501 are respectively connected to the storage ball 5 and the first pipeline 401, and the second pipeline 402 is connected to the drain pipe 204, and a one-way valve is fixedly arranged on the first pipeline 401 and the second pipeline 402. 2 is provided with a liquid adding tube 502 connected with the flexible tube 501, and a rubber plug is fixedly provided on the liquid adding tube 502. When in use, a storage ball 5 is provided in the storage chamber 202, and a blood coagulant is stored in the storage ball 5. When the piston plate 6 slides back and forth in the piston chamber 4, the blood coagulant in the storage ball 5 can be drawn out through the first pipeline 401 and the flexible tube 501, and then transported to the discharge pipe 204 through the second pipeline 402, mixed with the physiological saline entering the nozzle 3, and sprayed toward the incision position together, so that the physiological saline has a certain hemostatic effect, and the rotating roller 7 can cause irregular shaking of the liquid in the storage chamber 202 during the reciprocating rotation process, so that the storage ball 5 can be shaken, and the blood coagulant in the storage ball 5 can be properly shaken, the occurrence of precipitation is reduced, and the use effect is improved.

[0041] Reference Figure 1-Figure 4Here, we preferably provide two groups of guide seats 2, and open a limiting groove 102 on the fixed seat 1, and fixedly set a limiting seat 206 on the two groups of guide seats 2, and slide the limiting seats 206 in the limiting groove 102, and open positioning holes 101 at both ends of the fixed seat 1. When in use, the fixed seat 1 can be positioned and fixed by opening the positioning holes 101 on the fixed seat 1 to prevent movement during use and affect normal work. In addition, the limiting groove 102 is opened on the fixed seat 1, and the limiting seat 206 is fixedly set on the guide seat 2. The limiting seat 206 is slidably set in the limiting groove 102, which can ensure the reliable position of the guide seat 2, and the guide seat 2 with guide grooves 201 of different widths can be replaced as needed to improve the use effect.

[0042] Reference Figure 1-Figure 3 The fixed seat 1 is set in an arc-shaped structure, and angle scale lines are fixedly set on the fixed seat 1. A threaded hole is opened on the guide seat 2, and a first screw rod 8 is threadedly connected to the fixed seat 1. One group of guide seats 2 is threadedly connected to the first screw rod 8 to fix it on the fixed seat 1, and an adjustment groove 103 is opened on the fixed seat 1. A second screw rod 801 is slidably set in the adjustment groove 103, and another group of guide seats 2 is threadedly connected to the second screw rod 801 to fix the other group of guide seats 2 on the fixed seat 1. When in use, the fixed seat 1 is designed to be an arc-shaped structure, and angle scale lines are fixedly set on the fixed seat 1. After one group of guide seats 2 is fixed, it is convenient to adjust the position of the other group of guide seats 2, thereby increasing the accuracy and stability during cutting and improving the use.

[0043] A method for a distal femoral osteotomy device further comprises the following steps:

[0044] Step 1: Select a suitable guide seat 2 and fix it on the fixing seat 1 according to the cutting angle;

[0045] First, according to the thickness of the saw blade of the swing saw used, the guide seats 2 with corresponding guide grooves 201 are selected, and then they are fixed on the fixed seats 1 respectively. During the fixing process, the other set of guide seats 2 is adjusted accordingly according to the cutting angle, and then fixed after the adjustment is completed;

[0046] Step 2: insert a Kirschner wire into the femur, and then install and fix the fixing seat 1 on the Kirschner wire so that it is located in the positioning hole 101 respectively;

[0047] A Kirschner wire is driven into the femur to pass through the positioning hole 101 on the fixing seat 1, and nuts are provided at both ends of the positioning hole 101 to fix the fixing seat 1 at a suitable height of the Kirschner wire;

[0048] Step 3: Use an oscillating saw to cut, with the saw blade of the oscillating saw located in the guide groove 201, and spray physiological saline on the incision position and the saw blade through the nozzle 3;

[0049] During the cutting process, the nozzle 3 can spray physiological saline on the incision position and the end face of the saw blade during the swinging process, so as to flush and cool the incision position and the surface of the saw blade and improve the use effect.

[0050] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A distal femoral osteotomy device, comprising an oscillating saw for cutting, and a fixing seat (1) for guiding the oscillating saw, characterized in that: Also includes: At least one set of guide seats (2) which are detachably mounted on the fixed seat (1), wherein a guide groove (201) is provided on the guide seat (2), and the output end of the swing saw is swingably mounted in the guide groove (201); A nozzle (3) for flushing the incision, arranged on one end of the guide seat (2) facing the incision, a liquid supply portion being arranged on the guide seat (2), and an output end of the liquid supply portion being in communication with the nozzle (3); The liquid supply portion comprises a liquid inlet pipe (203), a storage chamber (202) is provided in the guide seat (2), one end of the liquid inlet pipe (203) is connected to the storage chamber (202), a liquid discharge pipe (204) is fixedly provided at the other end of the storage chamber (202), and the liquid discharge pipe (204) is connected to the input end of the nozzle (3); A plurality of groups of rotating rollers (7) are arranged in the storage cavity (202), and rotating shafts (702) are fixedly arranged at both ends of the plurality of groups of rotating rollers (7). The rotating shafts (702) are rotatably arranged in the guide seat (2), and the side walls of the rotating rollers (7) extend into the guide groove (201), and the two ends of the oscillating saw cutting blade respectively abut against the rotating rollers (7); Two groups of oil drain grooves (701) are provided on the side wall of the rotating roller (7); both groups of oil drain grooves (701) are in a spiral structure, and the two groups of oil drain grooves (701) rotate in opposite directions.

2. A distal femoral osteotomy device according to claim 1, characterized in that: A rotating plate (205) is fixedly provided at one end of the guide seat (2), a rotating shaft is fixedly provided on the outer wall of the nozzle (3), the rotating shaft is rotatably provided on the rotating plate (205), and a driving unit for driving the nozzle (3) to rotate is provided inside the guide seat (2).

3. A distal femoral osteotomy device according to claim 2, characterized in that: The driving part comprises a connecting plate (301) fixedly arranged on the outer wall of the nozzle (3), a piston chamber (4) is provided in the guide seat (2), a piston plate (6) is slidably provided in the piston chamber (4), a screw rod (601) is fixedly arranged at one end of the piston plate (6), a threaded sleeve (703) is fixedly arranged on the inner wall of one group of the rotating shafts (702), the screw rod (601) is threadedly connected to the threaded sleeve (703), and a sliding plate (602) is fixedly arranged at the other end of the piston plate (6), an arc groove (603) is provided on the sliding plate (602), and a polished rod (302) is fixedly arranged on the connecting plate (301), and the polished rod (302) is slidably provided in the arc groove (603).

4. A distal femoral osteotomy device according to claim 3, characterized in that: The invention also comprises a storage ball (5) for storing a coagulant, which is arranged in the storage cavity (202); a flexible tube (501) is fixedly arranged on the storage ball (5); one end of the flexible tube (501) away from the storage ball (5) is fixedly connected to the inner wall of the storage cavity (202); a first pipeline (401) and a second pipeline (402) are fixedly arranged on the piston cavity (4); the first pipeline (401) is connected to the flexible tube (501); the second pipeline (402) is connected to the liquid discharge pipe (204); and one-way valves are fixedly arranged on the first pipeline (401) and the second pipeline (402); and a liquid adding pipe (502) connected to the flexible tube (501) is provided on the guide seat (2).

5. The distal femoral osteotomy device according to claim 1, characterized in that: The guide seats (2) are provided in two groups, the fixed seats (1) are provided with limit slots (102), the two groups of guide seats (2) are both fixedly provided with limit seats (206), the limit seats (206) are both slidably arranged in the limit slots (102), and positioning holes (101) are provided at both ends of the fixed seats (1).

6. A distal femoral osteotomy device according to claim 5, characterized in that: The fixing seat (1) is in an arc-shaped structure, an angle scale line is fixedly arranged on the fixing seat (1), a threaded hole is provided on the guide seat (2), a first screw rod (8) is threadedly connected to the fixing seat (1), one group of the guide seats (2) is threadedly connected to the first screw rod (8), and an adjustment groove (103) is provided on the fixing seat (1), a second screw rod (801) is slidably arranged in the adjustment groove (103), and another group of the guide seats (2) is threadedly connected to the second screw rod (801).

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