Pressure relief type bone cement injector

Abstract

The invention relates to the technical field of medical equipment, in particular to a pressure relief type bone cement injector which comprises a mounting frame and a folding base rotationally connected to the mounting frame through damping, a barrel is fixedly connected to the mounting frame, a piston rod is slidably connected to the inner side of the barrel, a feeding hopper is connected to the barrel, and a cover plate is clamped to the feeding hopper. Firstly, the injection head is inserted into a channel established at the fracture part of a patient, air in the insertion process is exhausted through the exhaust hole and the through hole to complete pressure relief, and every time the piston rod moves downwards to push bone cement into the hose, air in the hose is exhausted into the disposable catheter through the connector and the connecting shell; and then the bone cement continuously flows and is injected into the fracture part of the patient through the injection head, so that air can be exhausted in advance to complete pressure relief every time before the bone cement is injected, discomfort caused by injection of the air into the body of the patient is prevented, and the experience feeling of the patient and the operation safety are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and in particular to a pressure-releasing bone cement injector. Background Art

[0002] In the field of orthopedic medicine, bone cement, as an important medical material, is widely used in various surgeries such as fracture treatment, bone defect repair and vertebroplasty. The injection of bone cement requires the use of a pusher, which can push the bone cement to the fracture site.

[0003] A Chinese patent with publication number CN112741677B discloses a bone cement injection device, comprising: a bracket; a bone cement injection actuator, which is arranged on the bracket and is used for bone cement injection; and a remote handheld control mechanism, which is connected to the bone cement injection actuator via a flexible connection mechanism; the remote handheld control mechanism includes an action component, and the action component drives the bone cement injection actuator to move through the flexible connection mechanism to perform a bone cement injection operation. Although the above patent can inject bone cement into the patient's fracture site, it is necessary to insert the bone cement injection head into the channel before pushing the bone cement. During this period, an almost closed cavity is formed, and the pressure rises sharply. In addition, during the process of bone cement pushing, the compressed air will also be injected into the patient's body at the same time, and the internal gas cannot be effectively discharged to the outside, causing great distension and pain to most patients, resulting in a very poor patient experience and affecting the safety of the operation.

[0004] The present invention aims to solve the problems existing in the above-mentioned patents. To this end, a pressure-releasing bone cement injector is proposed, which can discharge air in advance, prevent air from being injected into the patient's body and causing discomfort, and improve the patient experience and surgical safety. Summary of the Invention

[0005] In order to overcome the problem that the bone cement injection head needs to be inserted into the channel before pushing the bone cement, during which an almost closed cavity is formed, the pressure rises sharply, and during the bone cement injection process, the compressed air is also injected into the patient's body simultaneously, and the internal gas cannot be effectively discharged to the outside, causing great distension and pain to most patients, resulting in extremely poor patient experience and affecting the safety of the operation. The present invention provides a pressure-releasing bone cement injector that can discharge air in advance, prevent air from being injected into the patient's body and causing discomfort, and improve the patient experience and the safety of the operation.

[0006] The present invention is achieved through the following technical solutions: A pressure-releasing bone cement pusher comprises a mounting frame and a folding base connected to the mounting frame by damping rotation, a cylinder body is fixedly connected to the mounting frame, a piston rod is slidably connected to the inner side of the cylinder body, a feed hopper is connected to the cylinder body, a cover plate is clamped on the feed hopper, an electric control valve is installed on the cylinder body, a hose is connected to the discharge end of the electric control valve, a connector is connected to the tail end of the hose, an injection head is connected to the connector, and a driving assembly is also included on the mounting frame for driving the piston rod to move, a connecting shell is fixedly connected to the connector, a disposable catheter is threaded on the connecting shell, and the connecting shell is used to The air in the bone cement injection process is discharged into the disposable catheter so that the disposable catheter can discharge the air. A connecting component is provided between the disposable catheter and the cylinder body, which is used to discharge the air in the disposable catheter into the cylinder body. Exhaust ports are symmetrically opened along the circumference of the injection head to discharge the air generated during the insertion of the injection head. A rotary valve is rotatably mounted on the injection head along the circumference, and through holes corresponding to the exhaust ports are symmetrically opened on the rotary valve. A fixing ring is fixed to the connecting head, and the rotary valve rotatably penetrates the fixing ring. A closing component is provided between the connecting head and the connecting shell to close the connecting shell.

[0007] To further illustrate, the blocking assembly includes a rubber plate fixed to the inner side of the connector, the rubber plate is located below the connector shell, and an elastic sheet is symmetrically connected between the rubber plate and the connector shell.

[0008] Further explanation, the drive assembly includes a fixed frame fixed to the mounting frame, a movable plate is slidably connected to the inside of the fixed frame, the movable plate is fixedly connected to the piston rod, and is used to drive the piston rod to move, an electric screw threadedly connected to the movable plate is installed on the fixed frame, a wireless button is clamped on the mounting frame, and the wireless button and the electric screw are electrically connected through a control module.

[0009] Further explanation, the connecting assembly includes an external threaded ring fixedly connected to the top of the cylinder, the tail end of the disposable catheter passes through the inner side of the external threaded ring, a threaded joint is threaded on the external threaded ring, a corrugated tube is circumferentially fixed to the threaded joint, a film is fixed to the inside of the corrugated tube, the film is rotatably connected to the tail end of the disposable catheter, and an annular cutter located below the film is circumferentially fixed to the top of the external threaded ring for cutting the film.

[0010] Further explanation, the pressure-releasing bone cement injector also includes a stirring assembly, which includes a fixed shell fixed to the cylinder, a spiral stirring head rotatably connected to the inside of the fixed shell, and the spiral stirring head rotatably passes through the middle of the bottom of the cylinder to stir the bone cement in the cylinder. Scrapers are fixed to the upper circumferential edge of the spiral stirring head at evenly spaced intervals, and the scrapers are in contact with the inner wall of the cylinder to scrape off the bone cement attached to the inner wall of the cylinder. A rotating frame is fixed to the upper circumferential edge of the spiral stirring head, and a lifting ring located directly below the piston rod is slidably connected between the rotating frame and the scraper. A reset spring is connected between the lifting ring and the rotating frame. A viscosity sensor is fixedly connected to the spiral stirring head, and the upper part of the viscosity sensor is located in the cylinder. A rotating assembly is provided between the spiral stirring head and the fixed shell to drive the spiral stirring head to rotate.

[0011] To further illustrate, the rotating assembly includes a gear ring fixed to the circumference of the spiral stirring head, a stepper motor is mounted on the fixed housing, and a spur gear meshing with the gear ring is fixedly mounted on the end of the output shaft of the stepper motor.

[0012] Further explanation, the pressure-releasing bone cement injector also includes a cooling component, which includes a fixed tube fixedly mounted on the hose, a spiral plate circumferentially fixed to the inner side of the fixed tube in contact with the outer side of the hose for spirally guiding water, a mounting shell fixed between the connecting head and the fixed tube, a temperature sensor in contact with the connecting head installed on the inner side of the mounting shell, a circulating refrigerator installed on the folding base, the liquid outlet end of the circulating refrigerator connected to a drain pipe, the tail end of the drain pipe connected to the fixed tube, the liquid inlet end of the circulating refrigerator connected to the liquid inlet pipe, the tail end of the liquid inlet pipe connected to the fixed tube.

[0013] To further illustrate, the pressure-releasing bone cement injector further includes a transparent scale fixedly connected to the barrel.

[0014] The beneficial effects of the present invention are: 1. First, insert the injection head into the channel established at the patient's fracture site. The air in the insertion process is discharged through the exhaust hole and the through hole to complete the pressure relief. Whenever the piston rod moves downward to push the bone cement into the hose, the air in the hose is discharged into the connecting shell through the connector, and the air in the connecting shell is discharged into the disposable catheter. This is repeated to continuously discharge the air in the hose, thereby completing the pressure release in the closed cavity. Then the bone cement continues to flow through the injection head and is injected into the patient's fracture site. In this way, before injecting bone cement, the air can be discharged in advance to complete the pressure relief, preventing air from being injected into the patient's body and causing discomfort, thereby improving the patient experience and surgical safety.

[0015] 2. Under the action of the spiral stirring head, rotating frame and viscosity sensor, the spiral stirring head and rotating frame can stir the bone cement, and the viscosity sensor can detect the viscosity of the bone cement. Whenever the viscosity of the bone cement reaches the viscous stage, the bone cement can be pushed and used. In this way, the viscosity of the bone cement can be accurately identified, so that the bone cement can be used accurately at the best injection time.

[0016] 3. Under the action of the cooling component, whenever the temperature of the bone cement in the hose exceeds the maximum value, the cooling component can cool the bone cement in the hose so that the temperature of the bone cement drops to the standard value. In this way, it can prevent the bone cement from solidifying due to excessive temperature and affecting subsequent use, thereby ensuring the normal use of the bone cement. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0018] Figure 2 It is a schematic diagram of the three-dimensional structure of the connecting head and the injection head of the present invention.

[0019] Figure 3 It is a schematic diagram of the three-dimensional structure of the connecting shell and the disposable catheter of the present invention.

[0020] Figure 4 It is a schematic diagram of the three-dimensional structure of the rubber plate and the elastic sheet of the present invention.

[0021] Figure 5 It is a schematic diagram of the three-dimensional structure of the fixing ring and the rotary valve of the present invention.

[0022] Figure 6 This is a structural separation diagram of the fixed ring and the rotary valve of the present invention.

[0023] Figure 7 It is a schematic diagram of the three-dimensional structure of the connection component of the present invention.

[0024] Figure 8 It is a schematic diagram of the three-dimensional structure of the stirring assembly of the present invention.

[0025] Figure 9 It is a schematic cross-sectional structural diagram of the fixed shell of the present invention.

[0026] Figure 10 It is a schematic diagram of the three-dimensional structure of the cooling component of the present invention.

[0027] Figure 11 It is a schematic diagram of the three-dimensional structure of the spiral plate and the temperature sensor of the present invention.

[0028] In the accompanying drawings: 1-mounting frame, 2-folding base, 3-cylinder, 4-hose, 5-electric control valve, 6-piston rod, 7-feed hopper, 8-cover plate, 9-connector, 10-injection head, 11-fixed frame, 111-movable plate, 112-electric screw rod, 113-wireless button, 12-connecting shell, 121-rubber plate, 122-elastic sheet, 13-disposable catheter, 14-fixing ring, 141-rotary valve, 142-through hole, 143-exhaust port, 15-film, 151-bellows, 15 2-threaded connector, 153-external threaded ring, 154-annular cutter, 16-fixed shell, 161-spiral stirring head, 162-rotating frame, 163-lifting ring, 164-reset spring, 165-scraper, 166-viscosity sensor, 167-ring gear, 168-spur gear, 169-stepping motor, 17-fixed tube, 171-mounting shell, 172-drain pipe, 173-circulating refrigerator, 174-liquid inlet pipe, 175-spiral plate, 176-temperature sensor, 18-transparent scale. DETAILED DESCRIPTION

[0029] Example: A pressure-releasing bone cement injector, see Figure 1-Figure 7As shown, it includes a mounting frame 1 and a folding base 2 connected to the bottom of the mounting frame 1 by damping rotation, a cylinder 3 is fixedly connected to the right side of the mounting frame 1, a piston rod 6 is vertically slidably connected to the inner side of the cylinder 3, a feed hopper 7 is connected to the upper right side of the cylinder 3, a cover plate 8 is clamped on the top of the feed hopper 7, a pressure relief valve is provided on the cover plate 8, an electric control valve 5 is installed at the bottom of the cylinder 3, the discharge end of the electric control valve 5 is connected to a hose 4, the tail end of the hose 4 is connected to a connector 9, and an injection head 10 for spraying bone cement is connected to the right side of the connector 9, and also includes a drive assembly, a connecting shell 12, a closing assembly, a disposable catheter 13, a fixing ring 14, a rotary valve 141 and a connecting assembly. A drive assembly is provided on the mounting frame 1, and when the drive assembly is in operation, the drive assembly can drive the piston rod 6 to move up and down, a connecting shell 12 is fixedly penetrated on the right side of the top of the connector 9, and a disposable catheter 1 is threadedly connected to the connecting shell 12 3. The connecting shell 12 is used to discharge the air in the process of bone cement injection into the disposable catheter 13, so that the disposable catheter 13 can discharge the air. A connecting assembly is provided between the tail end of the disposable catheter 13 and the cylinder 3. The connecting assembly is used to discharge the air in the disposable catheter 13 into the cylinder 3. An exhaust port 143 is symmetrically opened along the circumference of the left side of the injection head 10. The exhaust port 143 is used to discharge the air generated during the insertion of the injection head 10. A rotary valve 141 is rotatably mounted on the left side of the outer side of the injection head 10. Through holes 142 are symmetrically opened on the rotary valve 141. The through holes 142 correspond to the exhaust port 143. A fixing ring 14 is fixed to the outer right side of the connector 9. The rotary valve 141 rotatably penetrates the fixing ring 14. A blocking assembly is provided between the connector 9 and the connecting shell 12. When the blocking assembly is in operation, the blocking assembly can close the connecting shell 12.

[0030] See also Figure 4 As shown, the sealing component includes a rubber plate 121 and an elastic sheet 122. The rubber plate 121 is fixed to the left side of the top of the connecting head 9. The rubber plate 121 is located below the connecting shell 12. The rubber plate 121 can seal the connecting shell 12. The elastic sheet 122 is symmetrically connected between the right side of the top of the rubber plate 121 and the top of the connecting shell 12.

[0031] See also Figure 2 As shown, the driving assembly includes a fixed frame 11, a movable plate 111, an electric screw 112 and a wireless button 113. The fixed frame 11 is fixedly connected to the upper right side of the mounting frame 1, and the movable plate 111 is vertically slidably connected to the inner side of the fixed frame 11. The right side of the movable plate 111 is fixedly connected to the upper part of the piston rod 6. The movable plate 111 can drive the piston rod 6 to move up and down. An electric screw 112 is vertically installed on the fixed frame 11, and the electric screw 112 is threadedly connected to the left side of the movable plate 111. A wireless button 113 is clamped on the upper left side of the mounting frame 1, and the wireless button 113 and the electric screw 112 are electrically connected through the control module.

[0032] See also Figure 3 and Figure 7 As shown, the connecting assembly includes a film 15, a bellows 151, a threaded joint 152, an external threaded ring 153 and an annular cutter 154. The external threaded ring 153 is fixedly connected to the rear side of the top of the cylinder 3, and the tail end of the disposable catheter 13 passes through the inner side of the external threaded ring 153. The threaded joint 152 is threadedly connected to the external threaded ring 153. The top of the threaded joint 152 is fixedly connected to the bellows 151 along the circumferential direction. The upper part of the inner side of the bellows 151 is fixedly connected to the film 15. The middle part of the film 15 is rotatably connected to the tail end of the disposable catheter 13. The top of the external threaded ring 153 is fixedly connected to the annular cutter 154 along the circumferential direction. The annular cutter 154 is located below the film 15. When the film 15 contacts the annular cutter 154, the annular cutter 154 can cut the film 15.

[0033] See also Figure 8 and Figure 9 As shown, the pressure-releasing bone cement pusher also includes a stirring assembly installed on the barrel 3, the stirring assembly includes a fixed shell 16, a spiral stirring head 161, a rotating frame 162, a lifting ring 163, a reset spring 164, a scraper 165, a viscosity sensor 166 and a rotating assembly. The outer bottom of the barrel 3 is fixedly connected to the fixed shell 16, and the inner bottom of the fixed shell 16 is rotatably connected to the spiral stirring head 161. The spiral stirring head 161 rotates through the middle of the bottom of the barrel 3. When the spiral stirring head 161 rotates, the spiral stirring head 161 can stir the bone cement in the barrel 3. Six scrapers 165 are fixedly connected to the upper part of the spiral stirring head 161 at evenly spaced intervals along the circumferential direction. The six scrapers 165 are in contact with the inner wall of the barrel 3. When the scrapers 165 rotate, the scrapers 165 can scrape off the bone cement attached to the inner wall of the barrel 3. The upper part of the spiral stirring head 161 is fixedly connected to the rotating frame 162 along the circumferential direction. A lifting ring 163 is vertically slidably connected between the frame 162 and the scraper 165. The lifting ring 163 is located directly below the piston rod 6. A return spring 164 is connected between the bottom of the lifting ring 163 and the lower part of the rotating frame 162. A viscosity sensor 166 is fixedly connected to the middle of the spiral stirring head 161. The upper part of the viscosity sensor 166 is located in the cylinder 3. A rotating assembly is provided between the spiral stirring head 161 and the fixed shell 16. When the rotating assembly is in operation, the rotating assembly can drive the spiral stirring head 161 to rotate so that the spiral stirring head 161 stirs the bone cement; the rotating assembly includes a ring gear 167, a spur gear 168 and a stepping motor 169. The lower part of the spiral stirring head 161 is fixedly connected with the ring gear 167 along the circumferential direction. The stepping motor 169 is installed on the right side of the fixed shell 16. The output shaft end of the stepping motor 169 is fixedly sleeved with a spur gear 168, and the spur gear 168 is meshed with the ring gear 167.

[0034] First, the medical staff removes the cover plate 8 from the feed hopper 7 and pours an appropriate amount of bone cement into the barrel 3 through the feed hopper 7. The bone cement contacts the spiral stirring head 161 and the rotating frame 162. When the barrel 3 is filled with an appropriate amount of bone cement, the bone cement is stopped from being discharged into the barrel 3, and the cover plate 8 is snapped back onto the feed hopper 7. The cover plate 8 closes the feed hopper 7, and then the connecting head 9 is held to drive the injection head 10 to move, so that the injection head 10 is inserted into the channel established at the patient's fracture site. The air in the process of inserting the injection head 10 is discharged through the exhaust port 143 and the through hole 142 to prevent the air from entering the patient's body during the insertion process and causing discomfort to the patient, thereby ensuring the patient's comfort during the insertion of the injection head 10. When the injection head 10 is inserted, twist the rotary valve 141 The forward rotation drives the through hole 142 to rotate forward, and the through hole 142 is not connected to the exhaust port 143 when rotating forward. The rotary valve 141 blocks the exhaust port 143, and then starts the stepper motor 169. The stepper motor 169 drives the spur gear 168 to reverse, and the reverse rotation of the spur gear 168 drives the ring gear 167 to reverse, and the reverse rotation of the ring gear 167 drives the spiral stirring head 161 to reverse, and the reverse rotation of the spiral stirring head 161 stirs the bone cement in the cylinder 3. At the same time, the rotation of the spiral stirring head 161 also drives the rotating frame 162 and the scraper 165 to reverse, and the lifting ring 163 can make the rotating frame 162 and the scraper 165 reverse steadily and synchronously. The reverse rotation of the rotating frame 162 further stirs the bone cement, so that the components of the bone cement are evenly mixed together, and the scraper 165 stirs the cylinder 3 The bone cement attached to the inner wall is scraped off, and the scraped bone cement continues to be stirred to prevent the bone cement from adhering to the inner wall of the cylinder 3 and affecting subsequent use, thereby ensuring that the bone cement is fully used. The bone cement will generate heat during the stirring process, which will increase the pressure in the cylinder 3. The medical staff can relieve the pressure in the cylinder 3 by pulling the pressure relief valve on the cover 8. The viscosity sensor 166 detects the viscosity of the bone cement. When the viscosity of the bone cement is stirred to the viscous stage, the viscosity sensor 166 controls the stepping motor 169 to turn off through the control module, the spur gear 168 stops driving the ring gear 167 to reverse, and the spiral stirring head 161, the rotating frame 162 and the scraper 165 stop reversing. In this way, the viscosity of the bone cement can be accurately identified, so that the bone cement can be accurately When the injection timing is optimal, the electric control valve 5 can be started, and the electric control valve 5 stops blocking the bone cement in the cylinder 3. The medical staff can remove the wireless button 113 from the mounting bracket 1 and press the wireless button 113 behind the lead plate. The wireless button 113 controls the electric screw 112 to rotate forward through the control module. The electric screw 112 rotates forward to drive the movable plate 111 to move downward. The movable plate 111 moves downward to drive the piston rod 6 to move downward. The piston rod 6 moves downward to push the bone cement in the cylinder 3 evenly into the hose 4. At the same time, the piston rod 6 moves downward to contact the lifting ring 163. The piston rod 6 pushes the lifting ring 163 to move downward, and the reset spring 164 is compressed. As the bone cement is pushed in, the bone cement pushes the air in the hose 4 into the connector 9.The air in the connecting head 9 is discharged into the disposable catheter 13 through the connecting shell 12, and the air in the disposable catheter 13 is discharged into the cylinder 3. This is repeated, and the air in the hose 4 can be continuously discharged, thereby completing the pressure release in the closed cavity to prevent the pressure increase in the hose 4 from causing air to be discharged into the patient's body and causing great distension and pain to the patient, thereby ensuring the patient's comfort. As the bone cement is continuously pushed, the bone cement flows into the connecting head 9 and contacts the rubber plate 121. The bone cement pushes the rubber plate 121 to swing upward, the elastic sheet 122 is compressed, and the rubber plate 121 swings upward to close the connecting shell 12, so that the bone cement will not be discharged into the connecting shell 12 to cause waste. The bone cement continues to flow and is discharged into the injection head 10, and the injection head 10 discharges the bone cement into The patient's fracture site, at the same time, the piston rod 6 moves downward so that the upper part of the cylinder 3 is in a negative pressure state, and the piston rod 6 moves downward to evacuate the bellows 151 through the external threaded ring 153 and the annular cutter 154, which also makes the bellows 151 compressed by the negative pressure, and the bellows 151 is compressed to drive the film 15 to move downward, and the film 15 moves downward and contacts the annular cutter 154, and the annular cutter 154 cuts the downward-moving film 15. After the film 15 is cut, the outside air can be discharged into the cylinder 3 through the bellows 151 and the external threaded ring 153. At this time, the piston rod 6 can continue to move downward without being affected to push the bone cement. When the bone cement in the cylinder 3 is completely discharged into the patient's fracture site, the rubber plate 121 does not come into contact with the bone cement. The rubber plate 121 swings downward and resets due to the action of the elastic sheet 122 to close the connecting shell 12. The wireless button 113 is pressed again. The wireless button 113 controls the electric screw 112 to be closed through the control module. The electric screw 112 stops driving the movable plate 111 to move downward, and the movable plate 111 stops driving the piston rod 6 to move downward. Then the medical staff takes the injection head 10 out of the channel established at the patient's fracture site, and then starts the electric screw 112 to reverse and drive the piston rod 6 to move upward and reset through the movable plate 111. The piston rod 6 is reset and disengaged from the lifting ring 163. Due to the action of the reset spring 164, the lifting ring 163 moves upward and resets, and the cover plate 8 is removed. An appropriate amount of water is poured into the cylinder 3 through the feed hopper 7. Press The above operation causes the piston rod 6 to move downward to push the water in the cylinder 3 into the hose 4, and the water in the hose 4 is discharged into the connector 9, and the water in the connector 9 is sprayed out through the injection head 10. The flow of water can clean the hose 4, the connector 9 and the injection head 10 to prevent the residual bone cement from causing blockage, thereby ensuring the normal use of the hose 4, the connector 9 and the injection head 10. When the hose 4, the connector 9 and the injection head 10 are clean, the piston rod 6 is reset, and the threaded joint 152 is twisted to reverse and disengage from the external threaded ring 153. The threaded joint 152 drives the bellows 151 to be removed, and then the disposable catheter 13 is twisted to rotate and move upward through the thread to separate from the connecting shell 12, and a new disposable catheter 13 is connected to the connecting shell 12.The threaded connector 152 on the disposable catheter 13 is connected to the external threaded ring 153. At this point, the end of the disposable catheter 13 is placed inside the barrel 3. The foldable base 2 is then pulled to the left to fold and the device can be stored. This allows the air to be expelled and pressure relieved before injecting bone cement, preventing air from being injected into the patient and causing discomfort, thereby improving the patient experience and surgical safety.

[0035] See also Figure 10 and Figure 11 As shown, the pressure-releasing bone cement injector also includes a cooling component installed between the folding base 2 and the hose 4. The cooling component includes a fixed tube 17, a mounting shell 171, a drain pipe 172, a circulating refrigerator 173, a liquid inlet pipe 174, a spiral plate 175 and a temperature sensor 176. The outer side of the hose 4 is fixedly sleeved with a fixed tube 17, and the inner side of the fixed tube 17 is fixedly connected with a spiral plate 175 along the circumferential direction. The spiral plate 175 contacts the outer side of the hose 4. When water is discharged into the fixed tube 17, the spiral plate 175 can realize spiral guidance of the water to make the water more fully The hose 4 contacts the bone cement to cool it down, and a mounting shell 171 is fixedly connected between the outer side of the connector 9 and the right side of the outer side of the fixed tube 17. A temperature sensor 176 is installed at the bottom of the mounting shell 171, and the temperature sensor 176 is in contact with the connector 9. A circulating refrigerator 173 is installed on the top of the folding base 2, and the liquid outlet end of the circulating refrigerator 173 is connected to the drain pipe 172, and the tail end of the drain pipe 172 is connected to the right side of the bottom of the fixed tube 17, and the liquid inlet end of the circulating refrigerator 173 is connected to the liquid inlet pipe 174, and the tail end of the liquid inlet pipe 174 is connected to the left side of the bottom of the fixed tube 17.

[0036] When the bone cement is pushed into the hose 4 and the connector 9, the temperature sensor 176 can detect the temperature of the bone cement through the connector 9. When the temperature sensor 176 detects that the temperature of the bone cement exceeds the set maximum value, the temperature sensor 176 controls the circulating refrigerator 173 to start through the control module. The circulating refrigerator 173 discharges cold water into the drain pipe 172. The cold water in the drain pipe 172 is discharged into the fixed pipe 17. The cold water in the fixed ring 14 contacts the spiral plate 175. The spiral plate 175 can spirally guide the cold water in the fixed pipe 17, so that the cold water continuously flows around the hose 4. The cold water flows in the direction of the flow, fully cooling the bone cement in the hose 4. When the cold water reaches the leftmost side of the fixed tube 17, it is discharged into the liquid inlet pipe 174. The cold water in the liquid inlet pipe 174 is then discharged back into the circulating refrigeration machine 173 for reuse. This process is repeated, continuously circulating the cold water to cool the bone cement in the hose 4. The cooled bone cement is then discharged into the injection head 10 through the connector 9 for reuse. When the temperature sensor 176 detects that the temperature of the bone cement has dropped to the specified value, the temperature sensor 176 controls the circulating refrigeration machine 173 through the control module to shut down, stopping the flow of cold water. This prevents the bone cement from overheating and solidifying, which affects subsequent use, thereby ensuring normal use of the bone cement.

[0037] See also Figure 1 As shown, the pressure-releasing bone cement injector further includes a transparent scale 18 , and the transparent scale 18 is fixedly connected to the lower front portion of the barrel 3 .

[0038] When bone cement is pushed for use by piston rod 6, medical staff can check the usage of bone cement in barrel 3 through transparent graduated scale 18. Like this, can make corresponding treatment according to the usage of bone cement in time, thereby guarantee the smooth pushing injection of bone cement.

Claims

1. A pressure-releasing bone cement injector, comprising a mounting frame (1) and a folding base (2) connected to the mounting frame (1) by damping rotation, a barrel (3) fixedly connected to the mounting frame (1), a piston rod (6) slidably connected to the inner side of the barrel (3), a feed hopper (7) connected to the barrel (3), a cover plate (8) clamped on the feed hopper (7), an electric control valve (5) installed on the barrel (3), a hose (4) connected to the discharge end of the electric control valve (5), a connector (9) connected to the tail end of the hose (4), an injection head (10) connected to the connector (9), and the characteristic of the invention is that: The invention also includes a driving assembly arranged on the mounting frame (1) for driving the piston rod (6) to move, a connecting shell (12) is fixedly connected to the connecting head (9), and a disposable catheter (13) is threadedly connected to the connecting shell (12), and the connecting shell (12) is used to discharge air during the bone cement injection process into the disposable catheter (13), so that the disposable catheter (13) discharges the air, and a connecting assembly is provided between the disposable catheter (13) and the cylinder (3) for discharging the air in the disposable catheter (13) into the cylinder (3), injecting The injection head (10) is provided with exhaust ports (143) symmetrically along the circumference to discharge air generated during the insertion of the injection head (10). The injection head (10) is provided with a rotary valve (141) rotatably mounted along the circumference. The rotary valve (141) is symmetrically provided with through holes (142) corresponding to the exhaust ports (143). A fixing ring (14) is fixed to the connector (9). The rotary valve (141) rotatably penetrates the fixing ring (14). A sealing component is provided between the connector (9) and the connecting shell (12) to seal the connecting shell (12).

2. A pressure-releasing bone cement injector as claimed in claim 1, characterized in that: The blocking component includes a rubber plate (121) fixed to the inner side of the connecting head (9), the rubber plate (121) is located below the connecting shell (12), and an elastic sheet (122) is symmetrically connected between the rubber plate (121) and the connecting shell (12).

3. A pressure-releasing bone cement injector as claimed in claim 2, characterized in that: The driving assembly includes a fixed frame (11) fixedly connected to the mounting frame (1), a movable plate (111) is slidably connected to the inner side of the fixed frame (11), the movable plate (111) is fixedly connected to the piston rod (6) and is used to drive the piston rod (6) to move, an electric screw rod (112) is installed on the fixed frame (11) and is threadedly connected to the movable plate (111), a wireless button (113) is clamped on the mounting frame (1), and the wireless button (113) and the electric screw rod (112) are electrically connected through a control module.

4. A pressure-releasing bone cement injector as claimed in claim 3, characterized in that: The connecting assembly includes an external threaded ring (153) fixedly connected to the top of the barrel (3), the tail end of the disposable catheter (13) passes through the inner side of the external threaded ring (153), a threaded joint (152) is threadedly connected to the external threaded ring (153), a bellows (151) is fixedly connected to the threaded joint (152) along the circumferential direction, a film (15) is fixedly connected to the inner side of the bellows (151), the film (15) is rotatably connected to the tail end of the disposable catheter (13), and an annular cutter (154) located below the film (15) is fixedly connected to the top of the external threaded ring (153) along the circumferential direction for cutting the film (15).

5. A pressure-releasing bone cement injector as claimed in claim 4, characterized in that: The pressure-releasing bone cement injector further comprises a stirring assembly, the stirring assembly comprising a fixed shell (16) fixedly connected to the barrel (3), a spiral stirring head (161) rotatably connected to the inner side of the fixed shell (16), the spiral stirring head (161) rotatably passes through the middle of the bottom of the barrel (3) and is used to stir the bone cement in the barrel (3), a scraper (165) is fixedly connected to the spiral stirring head (161) at uniform intervals along the circumference, the scraper (165) contacts the inner wall of the barrel (3) and is used to scrape off the bone cement attached to the inner wall of the barrel (3), and the spiral stirring head (161) is rotated to pass through the middle of the bottom of the barrel (3) and is used to stir the bone cement in the barrel (3). 1) A rotating frame (162) is fixedly connected to the upper edge in the circumferential direction, a lifting ring (163) located directly below the piston rod (6) is slidably connected between the rotating frame (162) and the scraper (165), a return spring (164) is connected between the lifting ring (163) and the rotating frame (162), a viscosity sensor (166) is fixedly connected to the spiral stirring head (161), and the upper part of the viscosity sensor (166) is located in the cylinder (3), and a rotating assembly is provided between the spiral stirring head (161) and the fixed shell (16) for driving the spiral stirring head (161) to rotate.

6. A pressure-releasing bone cement injector as claimed in claim 5, characterized in that: The rotating assembly includes a gear ring (167) fixed to the circumference of the spiral stirring head (161), a stepping motor (169) is installed on the fixed shell (16), and a spur gear (168) meshing with the gear ring (167) is fixedly sleeved on the end of the output shaft of the stepping motor (169).

7. A pressure-releasing bone cement injector as claimed in claim 6, characterized in that: The pressure-releasing bone cement injector further includes a cooling component, which includes a fixed tube (17) fixedly sleeved on the hose (4), a spiral plate (175) fixedly connected to the inner side of the fixed tube (17) along the circumferential direction and in contact with the outer side of the hose (4) for spirally guiding water, a mounting shell (171) fixedly connected between the connector (9) and the fixed tube (17), a temperature sensor (176) in contact with the connector (9) installed on the inner side of the mounting shell (171), a circulating refrigerator (173) installed on the folding base (2), a liquid outlet end of the circulating refrigerator (173) connected to a drain pipe (172), a tail end of the drain pipe (172) connected to the fixed tube (17), a liquid inlet end of the circulating refrigerator (173) connected to a liquid inlet pipe (174), and a tail end of the liquid inlet pipe (174) connected to the fixed tube (17).

8. The pressure-releasing bone cement injector according to claim 7, wherein: The pressure-releasing bone cement injector further comprises a transparent scale (18) fixedly connected to the barrel (3).

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