Thoracocentesis device

Abstract

The invention provides a thoracocentesis device, and relates to the technical field of medical instruments, the thoracocentesis device comprises a fixing support, the fixing support comprises a positioning side plate, a movable positioning plate is transversely and slidably mounted at the front end of the positioning side plate, an adjusting positioning frame is longitudinally and rotatably mounted at the front end of the movable positioning plate, and the adjusting positioning frame comprises a rotating base; a pair of clamping discs is transversely and rotationally installed on the two sides of the top of the rotating base, a puncture liquid extraction needle is clamped between balls on the inner sides of the two clamping discs and comprises a puncture needle tube, a sliding supporting tube is slidably installed in the puncture needle tube along the axis, and a puncture needle head is fixedly installed at the front end of the sliding supporting tube; a sliding transmission tube is slidably mounted in the sliding supporting tube along the axis. According to the thoracic cavity hydrops cleaning device, hydrops in the thoracic cavity of a patient can be more comprehensively and effectively cleaned through the telescopic puncture needle head; liquid drainage and medicine delivery are performed through the two channels in the sliding delivery tube respectively, and the situation that liquid drainage and medicine delivery share the same needle tube, and consequently residual medicine liquid flows back can be avoided.

Description

Technical Field

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

[0002] Thoracentesis is a commonly used diagnostic and treatment method in clinical pulmonary medicine. Thoracentesis is usually an operation in which a sterilized puncture needle penetrates the skin tissue, intercostal tissue, parietal pleura and then enters the pleural cavity to extract the effusion in the pleural cavity for testing or to extract excess effusion for treatment of the patient, or the puncture needle is inserted into the pleural cavity to deliver drugs for treatment.

[0003] However, the existing puncture needle can only be used for single execution in extracting effusion or delivering drugs, which makes the treatment process longer. At the same time, the puncture needle cannot move in the chest cavity, so the local effusion cannot be extracted smoothly.

[0004] Based on this, the present invention provides a thoracentesis device. Summary of the invention

[0005] In view of the above technical problems, the present invention provides a thoracentesis device, including a fixed bracket, the fixed bracket includes a positioning side plate, a movable positioning plate is installed with a transverse sliding front end of the positioning side plate, an adjustment positioning bracket is installed with a longitudinal rotation front end of the movable positioning plate, the adjustment positioning bracket includes a rotating base, a pair of clamping disks are installed with a transverse rotation on both sides of the top of the rotating base, a plurality of supporting balls are installed with a rolling manner on the inner side of the clamping disk, a puncture and liquid extraction needle is clamped between the balls on the inner sides of the two clamping disks, the puncture and liquid extraction needle includes a puncture needle tube, a sliding support tube is installed with a sliding axis in the puncture needle tube, a puncture needle is fixedly installed at the front end of the sliding support tube, a transmission hole is provided on the puncture needle, and the front end of the inner wall of the transmission hole of the puncture needle is fixed An annular support frame is installed, and the annular support frame is shaped like a beveled ring, and the inclination angle is the same as that of the top of the puncture needle. A thread is provided at the rear end of the sliding support tube, and a sliding transmission tube is slidably installed inside the sliding support tube along the axis. A transmission warehouse is provided on the top of the sliding transmission tube, and a transmission port is provided on the back of the transmission warehouse at the top of the sliding transmission tube. A baffle is provided inside the sliding transmission tube, and a pinhole baffle is fixedly installed on the top of the sliding transmission tube. The pinhole baffle is an inclined elliptical baffle, and the inclination angle is the same as that of the top of the puncture needle. The bottom of the pinhole baffle is in contact with the annular support frame, and a flow limiting valve core is rotatably installed in the transmission warehouse at the top of the sliding transmission tube along the axis, and a torsion spring is fixedly installed between the flow limiting valve core and the sliding transmission tube.

[0006] Furthermore, a lever is fixedly installed on the outer wall of the flow limiting valve core, and the lever is installed at the symmetrical center line position of the flow limiting valve core. An adjustment plate is fixedly installed on the inner wall of the pinhole baffle. The lever on the outer wall of the flow limiting valve core contacts and cooperates with the adjustment plate on the inner wall of the pinhole baffle.

[0007] Furthermore, the baffle in the sliding transmission tube divides the inner wall of the sliding transmission tube into two channels, the two channels inside the sliding transmission tube are connected to the transmission chamber at the top of the sliding transmission tube, and the flow limiting valve core contacts and cooperates with the top of the channel inside the sliding transmission tube.

[0008] Furthermore, a first adjusting handle is rotatably installed on the rear end of the transmission gear rod along the axis, and a second adjusting handle is rotatably installed on the rear end of the first adjusting handle. The first adjusting handle cooperates with the threaded screw on the sliding support tube, and the rear end of the sliding transmission tube is provided with a gear pattern. A transmission gear rod is rotatably installed on the outer ring of the rear end of the puncture needle tube, and the transmission gear rod is meshed with the gear pattern at the rear end of the sliding transmission tube. The inner ring of the second adjusting handle is provided with a gear pattern, and the gear pattern of the inner ring of the second adjusting handle is meshed with the transmission gear rod.

[0009] Furthermore, an outer tube connector is fixedly installed at the bottom of the puncture needle tube, a supporting hard tube is fixedly installed at the bottom of the puncture needle tube, an outer transmission tube is fixedly installed on the inner wall of the rear end of the supporting hard tube, and a soft connecting tube is fixedly installed between the outer transmission tube and the outer tube connector.

[0010] Furthermore, an adjusting rod is installed on the top of the positioning side plate for transverse rotation, a screw is fixedly installed on the adjusting rod, a rack plate is fixedly installed on the rear end of the movable positioning plate, the rack plate is installed in the positioning side plate for transverse sliding, and the rack plate cooperates with the screw and worm on the adjusting rod.

[0011] Furthermore, a plurality of first fixed suction cups are fixedly installed on the bottom of the positioning side plate, a first air suction rod is fixedly installed on the top of the positioning side plate, the first air suction rod is connected to the first fixed suction cup, a second fixed suction cup is fixedly installed on the bottom of the movable positioning plate, a second air suction rod is fixedly installed on the top of the movable positioning plate, the second air suction rod is connected to the second fixed suction cup.

[0012] Furthermore, positioning teeth are fixedly installed on both sides of the top of the rotating base, a U-shaped clamp is installed on the top of the rotating base for transverse rotation, adjusting pressure rods are fixedly installed on the inner walls of both sides of the U-shaped clamp, the adjusting pressure rod is rotatably installed on the outside of the clamping disk, a pair of positioning rods are slidably installed along the radial direction on the outside of the clamping disk, a compression spring is fixedly installed between the bottom of the positioning rod and the clamping disk, the positioning rod is in contact with the positioning teeth, a trapezoidal key is fixedly installed on the outside of the clamping disk, the inner wall of the adjusting pressure rod is a conical surface, and the inclined surface of the trapezoidal key on the outside of the positioning rod is in contact with the inner wall of the adjusting pressure rod.

[0013] Furthermore, partitions are fixedly installed inside the soft connecting pipe and inside the front half of the outer transmission pipe and are fixedly connected, and the partition inside the soft connecting pipe is fixedly connected to the baffle inside the sliding transmission pipe.

[0014] Compared with the prior art, the present invention has the following advantages: (1) The present invention uses a retractable puncture needle to allow the needle tube to swing when piercing the patient's chest cavity without piercing the patient's body tissue, which can more comprehensively and effectively clear the effusion in the patient's chest cavity; (2) The present invention can control the opening or closing of the transmission hole at the top of the puncture needle by sliding the transmission tube and the needle hole baffle, which can prevent the residual human tissue in the transmission hole from blocking the exhaust channel when the puncture needle is inserted into the patient's body, and the exhaust process is smoother; (3) The present invention uses two channels inside the sliding transmission tube to perform drainage and drug transmission respectively, which can avoid drainage and drug delivery sharing the same needle tube, resulting in residual drug liquid reflux, and at the same time avoid frequent replacement of needle tubes to reduce patient discomfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the top structure of the present invention.

[0016] Figure 2 It is a schematic diagram of the side structure of the present invention.

[0017] Figure 3 It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 4 It is a schematic diagram of the overall bottom structure of the present invention.

[0019] Figure 5 It is a schematic diagram of the half-section structure of the puncture and liquid extraction needle of the present invention.

[0020] Figure 6 It is a schematic diagram of the overall structure of the sliding support tube of the present invention.

[0021] Figure 7 It is a schematic diagram of the half-section structure of the sliding support rod of the present invention.

[0022] Figure 8 It is a schematic diagram of the overall structure of the sliding transmission tube of the present invention.

[0023] Fig. 9 It is a schematic diagram of the assembly structure of the sliding support tube of the present invention.

[0024] Fig.10 This is a schematic diagram of the assembly structure of the adjustable positioning frame of the present invention.

[0025] Fig.11 for Figure 4 A1 is an enlarged schematic diagram of the structure.

[0026] Fig.12 for Figure 7 Enlarged structural diagram at B1 in the middle.

[0027] Fig.13 for Figure 8 Enlarged structural diagram of C1 in the middle.

[0028] Fig.14 for Fig.10 Enlarged structural diagram of D1 in the middle.

[0029] Reference numerals: 1-fixed bracket; 2-puncture and liquid extraction needle; 3-adjustment and positioning bracket; 101-positioning side plate; 102-first fixed suction cup; 103-first air extraction rod; 104-adjustment rotating rod; 105-movable positioning plate; 106-second air extraction rod; 107-second fixed suction cup; 108-rack plate; 201-puncture needle tube; 202-first adjustment handle; 203-second adjustment handle; 204-support hard tube; 2 05-external transmission tube; 206-soft connecting tube; 207-puncture needle; 208-sliding support tube; 209-sliding transmission tube; 210-transmission gear rod; 211-annular support frame; 212-flow limiting valve core; 213-needle hole baffle; 214-external tube connector; 301-rotating base; 302-U-shaped clamping plate; 303-adjusting pressure rod; 304-positioning tooth; 305-clamping disk; 306-positioning rod. DETAILED DESCRIPTION

[0030] The technical solution provided by the present invention is further described below in conjunction with the accompanying drawings and according to specific implementation methods.

[0031] like Figure 1 to Figure 14As shown, a thoracentesis device comprises a fixed bracket 1, the fixed bracket 1 comprises a positioning side plate 101, a movable positioning plate 105 is installed with a transverse sliding movement at the front end of the positioning side plate 101, an adjustment positioning frame 3 is installed with a longitudinal rotation at the front end of the movable positioning plate 105, the adjustment positioning frame 3 comprises a rotating base 301, a pair of clamping plates 305 are installed with a transverse rotation movement at both sides of the top of the rotating base 301, a plurality of supporting balls are installed with a rolling movement inside the clamping plates 305, a puncture and liquid extraction needle 2 is clamped between the balls inside the two clamping plates 305, an adjustment rotating rod 104 is installed with a transverse rotation movement at the top of the positioning side plate 101, a screw is fixedly installed on the adjusting rotating rod 104, a rack plate 108 is fixedly installed at the rear end of the movable positioning plate 105, the rack plate 108 is installed with a transverse sliding movement inside the positioning side plate 101, and the rack plate 108 and the screw on the adjusting rotating rod 104 are connected The screw and worm are used to adjust the sliding position of the movable positioning plate 105 on the positioning side plate 101, which is convenient for adjustment and fixation. A plurality of first fixed suction cups 102 are fixedly installed on the bottom of the positioning side plate 101, and a first suction rod 103 is fixedly installed on the top of the positioning side plate 101. The first suction rod 103 is connected to the first fixed suction cup 102 and is used to extract the air between the first fixed suction cup 102 and the patient's skin. A second fixed suction cup 107 is fixedly installed on the bottom of the movable positioning plate 105, and a second suction rod 106 is fixedly installed on the top of the movable positioning plate 105. The second suction rod 106 is connected to the second fixed suction cup 107 and is used to extract the air between the second fixed suction cup 107 and the patient's skin. The first fixed suction cup 102 and the second fixed suction cup 107 are used to adsorb the patient's skin to fix the device on the patient's chest.

[0032] like Figure 1 to Figure 14 As shown, positioning teeth 304 are fixedly installed on both sides of the top of the rotating base 301, a U-shaped clamping plate 302 is installed on the top of the rotating base 301 for transverse rotation, and adjusting pressure rods 303 are fixedly installed on the inner walls of both sides of the U-shaped clamping plate 302. The adjusting pressure rod 303 is rotatably installed on the outside of the clamping plate 305, and a pair of positioning rods 306 are slidably installed along the radial direction on the outside of the clamping plate 305. A compression spring is fixedly installed between the bottom of the positioning rod 306 and the clamping plate 305, and the positioning rod 306 contacts and cooperates with the positioning teeth 304. A trapezoidal key is fixedly installed on the outside of the clamping plate 305. The inner wall of 303 is a conical surface, and the inclined surface of the trapezoidal key on the outside of the positioning rod 306 contacts and cooperates with the inner wall of the adjusting pressure rod 303. By pressing the two sides of the U-shaped clamping plate 302, the adjusting pressure rod 303 is pushed to slide in the clamping plate 305. Through the cooperation of the conical surface on the inner side of the clamping plate 305 and the trapezoidal key on the clamping plate 305, the positioning rod 306 is driven to slide in the clamping plate 305 and no longer cooperates with the positioning tooth 304, so that the clamping plate 305 can rotate on the top of the rotating base 301, which is used to adjust the rotation angle of the puncture and liquid extraction needle 2, so as to fix and adjust the angle of the puncture and liquid extraction needle 2 when it is inserted.

[0033] like Figure 1 to Figure 14As shown, the puncture and fluid extraction needle 2 includes a puncture needle tube 201, in which a sliding support tube 208 is slidably installed along the axis, and a puncture needle head 207 is fixedly installed at the front end of the sliding support tube 208, and a transmission hole is provided on the puncture needle head 207. The sliding support tube 208 is used to pierce the patient's skin, and at the same time, it retracts into the puncture needle tube 201 after piercing into the patient's chest cavity, so that the puncture and fluid extraction needle 2 can swing in the patient's chest cavity without scratching the tissue in the patient's body, which is convenient for the puncture and fluid extraction needle 2 to remove the accumulated fluid or air in the dead corner of the patient's chest cavity. The rear end of the sliding support tube 208 is provided with a thread, and the rear end of the transmission gear rod 210 is rotatably installed with a first adjusting handle 202 along the axis. The first adjusting handle 202 cooperates with the threaded screw on the sliding support tube 208, and the telescopic position of the sliding support tube 208 in the puncture needle tube 201 can be adjusted by rotating the first adjusting handle 202.

[0034] like Figure 1 to Figure 14 As shown, an annular support frame 211 is fixedly installed at the front end of the inner wall of the transmission hole of the puncture needle 207. The annular support frame 211 is in the shape of an oblique ring, and the inclination angle is the same as that of the top of the puncture needle 207. A sliding transmission tube 209 is slidably installed along the axis inside the sliding support tube 208. The sliding transmission tube 209 is used to discharge air or effusion in the patient's chest cavity and to transmit drugs to the patient's chest cavity. A transmission chamber is provided at the top of the sliding transmission tube 209, and a transmission port is provided on the back of the transmission chamber at the top of the sliding transmission tube 209. The transmission port As a common entrance and exit for exhausting gas and transmitting liquid medicine, a baffle is provided inside the sliding transmission tube 209 for dividing the interior of the sliding transmission tube 209 into two pipes for transmitting liquid medicine and exhausting gas. A pinhole baffle 213 is fixedly installed on the top of the sliding transmission tube 209. The pinhole baffle 213 is an inclined elliptical baffle with the same inclination angle as the top of the puncture needle 207. It is used to block the transmission hole in the puncture needle 207 to prevent foreign matter from adhering to the exhaust channel when the puncture needle 207 is inserted into the patient's chest cavity, thereby blocking the discharge of accumulated fluid or gas.

[0035] like Figure 1 to Figure 14As shown, the bottom of the pinhole baffle 213 is in contact with the annular support frame 211, and a flow limiting valve core 212 is rotatably installed along the axis in the transmission chamber at the top of the sliding transmission tube 209. A torsion spring is fixedly installed between the flow limiting valve core 212 and the sliding transmission tube 209. The flow limiting valve core 212 is in contact with the top of the internal channel of the sliding transmission tube 209 to adjust the opening or closing of the two channels. A lever is fixedly installed on the outer wall of the flow limiting valve core 212, and the lever is installed at the symmetrical center line position of the flow limiting valve core 212. An adjusting plate is fixedly installed on the inner wall of the baffle 213, and the lever on the outer wall of the flow limiting valve core 212 contacts and cooperates with the adjusting plate on the inner wall of the pinhole baffle 213 to control the flow limiting valve core 212 to rotate in the transmission bin at the top of the sliding transmission tube 209. The rear end of the first adjusting handle 202 is rotatably installed with the second adjusting handle 203, the rear end of the sliding transmission tube 209 is provided with a gear pattern, and the outer ring of the rear end of the puncture needle tube 201 is transversely rotatably installed with a transmission gear rod 210, and the transmission gear rod 210 is meshed with the gear pattern at the rear end of the sliding transmission tube 209 The inner ring of the second adjustment handle 203 is provided with a gear pattern, and the gear pattern of the inner ring of the second adjustment handle 203 is meshed with the transmission gear rod 210. By rotating the second adjustment handle 203, the transmission gear rod 210 is driven to rotate on the puncture needle tube 201. The rotation of the transmission gear rod 210 drives the sliding transmission tube 209 to rotate in the sliding support tube 208. At the same time, through the contact and cooperation between the bottom of the needle hole baffle 213 and the top of the annular support frame 211, the needle hole baffle 213 is driven along the top inclined surface of the annular support frame 211 toward the puncture needle 20 7, so that the sliding transmission tube 209 slides out of the outside of the puncture needle 207 by a certain distance, and leaks out of the transmission port at the rear end of the transmission bin at the top of the sliding transmission tube 209. At the same time, when the sliding transmission tube 209 rotates, the adjustment plate on the inner wall of the annular support frame 211 contacts the lever on the outer wall of the flow limiting valve core 212, driving the flow limiting valve core 212 to rotate in the opposite direction in the transmission bin at the top of the sliding transmission tube 209, so as to close the corresponding channel inside the sliding transmission tube 209, so as to control the device to exhaust or transmit drugs.

[0036] like Figure 1 to Figure 14 As shown, an outer tube connector 214 is fixedly installed at the bottom of the puncture needle tube 201, a supporting hard tube 204 is fixedly installed at the bottom of the puncture needle tube 201, an outer transmission tube 205 is fixedly installed on the inner wall of the rear end of the supporting hard tube 204, a soft connecting tube 206 is fixedly installed between the outer transmission tube 205 and the outer tube connector 214, partitions are fixedly installed inside the soft connecting tube 206 and the inside of the front half of the outer transmission tube 205 and fixedly connected, the partition inside the soft connecting tube 206 is fixedly connected to the baffle inside the sliding transmission tube 209, and the soft connecting tube 206 is used to offset the torsional stress generated between the sliding transmission tube 209 and the outer transmission tube 205 when the sliding transmission tube 209 rotates in the transmission gear rod 210, so as to prevent the sliding transmission tube 209 from being damaged.

[0037] Working principle: When performing thoracic puncture and drainage treatment on a patient, firstly, the positioning side plate 101 is attached to the side of the patient's chest, and the first air pumping rod 103 is pulled to make the first fixed suction cup 102 adsorbed on the patient's body surface, and then the adjusting rod 104 is rotated to adjust the sliding position of the movable positioning plate 105 on the positioning side plate 101, and the insertion position of the puncture and liquid extraction needle 2 is adjusted, and then the second air pumping rod 106 is pulled to make the second fixed suction cup 107 adsorbed on the patient's chest surface to fix the insertion position; After that, the insertion angle of the puncture and liquid extraction needle 2 is adjusted by pressing the two sides of the U-shaped clamping plate 302 as needed. After the angle is fixed, the first adjusting handle 202 is rotated to drive the sliding support tube 208 to slide in the puncture needle tube 201, so that the puncture needle 207 is extended to the outside of the puncture needle tube 201, so that the puncture needle tube 201 can be smoothly inserted into the patient's chest cavity. After reaching the required position, the first adjusting handle 202 is pulled on the puncture needle tube 201 for unidirectional rotation, so that the puncture needle 207 is retracted into the puncture needle tube 201 to prevent the puncture needle 207 from damaging the tissue in the patient's body. Then, the second adjusting handle 203 is rotated to drive the sliding transmission tube 209 to rotate in the sliding support tube 208, so that the sliding transmission tube 209 extends out of the top of the puncture needle 207, and the waste gas or effusion in the patient is extracted through the transmission port at the top of the sliding transmission tube 209. At the same time, the angle of the puncture needle tube 201 can be adjusted at any time to treat the effusion in the dead corner of the patient's chest cavity; After the accumulated fluid is discharged, the second adjusting handle 203 is rotated in the opposite direction to make the flow limiting valve core 212 rotate in the opposite direction in the sliding transmission tube 209, thereby opening the drug discharge channel in the sliding transmission tube 209, and delivering the drug solution to the patient's chest cavity through the puncture needle tube 201 for treatment.

Claims

1. A thoracentesis device, comprising a fixing bracket (1), characterized in that: The fixed support (1) comprises a positioning side plate (101), a movable positioning plate (105) is installed on the front end of the positioning side plate (101) in a transversely slidable manner, an adjustment positioning frame (3) is installed on the front end of the movable positioning plate (105) in a longitudinally rotatable manner, the adjustment positioning frame (3) comprises a rotating base (301), a pair of clamping plates (305) are installed on both sides of the top of the rotating base (301) in a transversely rotatable manner, a plurality of supporting balls are installed in a rolling manner on the inner side of the clamping plates (305), a puncture liquid extraction needle (2) is clamped between the balls on the inner sides of the two clamping plates (305), the puncture liquid extraction needle (2) comprises a puncture needle tube (201), a sliding support tube (208) is installed in the puncture needle tube (201) in a slidable manner along the axis, a puncture needle (207) is fixedly installed on the front end of the sliding support tube (208), a transmission hole is provided on the puncture needle (207), an annular support frame (211) is fixedly installed on the front end of the inner wall of the transmission hole of the puncture needle (207), The annular support frame (211) is in the shape of an oblique circular ring, and its inclination angle is the same as that of the top of the puncture needle (207). The rear end of the sliding support tube (208) is provided with a thread. A sliding transmission tube (209) is slidably installed inside the sliding support tube (208) along the axis. A transmission chamber is provided at the top of the sliding transmission tube (209). A transmission port is provided on the back of the transmission chamber at the top of the sliding transmission tube (209). A baffle is provided inside the sliding transmission tube (209). A pinhole baffle (213) is fixedly installed on the top of the sliding transmission tube (209). The pinhole baffle (213) is an inclined elliptical baffle, and its inclination angle is the same as that of the top of the puncture needle (207). The bottom of the pinhole baffle (213) contacts and cooperates with the annular support frame (211). A flow limiting valve core (212) is rotatably installed inside the transmission chamber at the top of the sliding transmission tube (209) along the axis. A torsion spring is fixedly installed between the flow limiting valve core (212) and the sliding transmission tube (209). The outer wall of the flow limiting valve core (212) is fixedly mounted with a lever, which is mounted at a symmetrical centerline position of the flow limiting valve core (212); the inner wall of the pinhole baffle (213) is fixedly mounted with an adjustment plate, and the lever on the outer wall of the flow limiting valve core (212) is in contact with and fits with the adjustment plate on the inner wall of the pinhole baffle (213).

2. A thoracentesis device according to claim 1, characterized in that: The baffle plate inside the sliding transmission tube (209) divides the inner wall of the sliding transmission tube (209) into two channels, the two channels inside the sliding transmission tube (209) are connected to the transmission chamber at the top of the sliding transmission tube (209), and the flow limiting valve core (212) contacts and cooperates with the top of the channel inside the sliding transmission tube (209).

3. A thoracentesis device according to claim 1, characterized in that: A first adjusting handle (202) is rotatably mounted on the rear end of the transmission gear rod (210) along the axis, and a second adjusting handle (203) is rotatably mounted on the rear end of the first adjusting handle (202). The first adjusting handle (202) cooperates with a threaded screw on a sliding support tube (208). A gear pattern is provided on the rear end of the sliding transmission tube (209). A transmission gear rod (210) is rotatably mounted on the outer ring of the rear end of the puncture needle tube (201). The transmission gear rod (210) meshes with the gear pattern on the rear end of the sliding transmission tube (209). The inner ring of the second adjusting handle (203) is provided with a gear pattern, and the gear pattern on the inner ring of the second adjusting handle (203) meshes with the transmission gear rod (210).

4. A thoracentesis device according to claim 1, characterized in that: An outer tube connector (214) is fixedly mounted on the bottom of the puncture needle tube (201), a supporting hard tube (204) is fixedly mounted on the bottom of the puncture needle tube (201), an outer transmission tube (205) is fixedly mounted on the inner wall of the rear end of the supporting hard tube (204), and a soft connection tube (206) is fixedly mounted between the outer transmission tube (205) and the outer tube connector (214).

5. A thoracentesis device according to claim 1, characterized in that: An adjusting rod (104) is installed on the top of the positioning side plate (101) for transverse rotation, and a screw is fixedly installed on the adjusting rod (104). A rack plate (108) is fixedly installed on the rear end of the movable positioning plate (105). The rack plate (108) is installed in the positioning side plate (101) for transverse sliding. The rack plate (108) cooperates with the screw and worm on the adjusting rod (104).

6. A thoracentesis device according to claim 1, characterized in that: A plurality of first fixed suction cups (102) are fixedly mounted on the bottom of the positioning side plate (101), a first air suction rod (103) is fixedly mounted on the top of the positioning side plate (101), the first air suction rod (103) is connected to the first fixed suction cup (102), a second fixed suction cup (107) is fixedly mounted on the bottom of the movable positioning plate (105), a second air suction rod (106) is fixedly mounted on the top of the movable positioning plate (105), the second air suction rod (106) is connected to the second fixed suction cup (107).

7. A thoracentesis device according to claim 1, characterized in that: Positioning teeth (304) are fixedly mounted on both sides of the top of the rotating base (301); a U-shaped clamping plate (302) is rotatably mounted on the top of the rotating base (301); adjusting pressure rods (303) are fixedly mounted on the inner walls of both sides of the U-shaped clamping plate (302); the adjusting pressure rods (303) are rotatably mounted on the outside of the clamping plate (305); a pair of positioning rods (306) are slidably mounted along the radial direction on the outside of the clamping plate (305); a compression spring is fixedly mounted between the bottom of the positioning rods (306) and the clamping plate (305); the positioning rods (306) are in contact with the positioning teeth (304); a trapezoidal key is fixedly mounted on the outside of the clamping plate (305); the inner wall of the adjusting pressure rod (303) is a conical surface; the inclined surface of the trapezoidal key on the outside of the positioning rod (306) is in contact with the inner wall of the adjusting pressure rod (303).

8. A thoracentesis device according to claim 4, characterized in that: The interior of the soft connecting tube (206) and the interior of the front half of the external transmission tube (205) are both fixedly installed with partitions and are fixedly connected. The partition inside the soft connecting tube (206) is fixedly connected to the baffle inside the sliding transmission tube (209).

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