CN108175484A - A kind of Therapeutic paracentesis device - Google Patents

Abstract

The invention discloses a peritoneal puncture drainer, which is equipped with a suction device, so that the fluid in the peritoneal cavity can be absorbed by the suction effect. Compared with the existing natural flow out through pressure, this solution can further provide The power can make the outflow of effusion more effective, and a fixing device is set, so that when the doctor inserts the puncture needle, the puncture needle can be fixed on the surface of the patient's abdominal cavity through the fixing device, and an assistant can not be used to clamp the puncture needle, which can avoid The assistant's mistake also reduces the labor force. The pressure sensor is set so that the instantaneous pressure change when the puncture needle penetrates the abdominal cavity can be detected, and then the pressure signal is sent to the external device through the set wireless transmitter, which can be better. It provides doctors with observation, and better reminds doctors to prevent internal organs from being injured by excessive puncture.

Description

A kind of peritoneal puncture liquid discharger

technical field

The invention relates to the field of medical instruments, in particular to a peritoneal puncture drainer.

Background technique

At present, it is a very common operation for patients to perform peritoneal puncture, chemotherapy or fluid release in clinical practice, especially for a large amount of intraperitoneal fluid, which is critical to the patient's life. Performing puncture and draining is an effective treatment method, but most of the puncture needles used by people when performing peritoneal puncture and draining treatment are single puncture needles, so the doctor needs an assistant to come after inserting the puncture needle into the abdominal cavity. Clamp the puncture needle with a medical clip to prevent the puncture needle from going deep in the body or scratching and injuring internal organs, which will increase labor costs, and unskilled assistants are also prone to accidents due to improper operation.

Because above-mentioned problem exists, just need a kind of can one-person operation, do not need the puncture drainer of assistant to solve the above-mentioned problem.

Contents of the invention

Aiming at the deficiencies in the prior art, the purpose of the present invention is to provide a puncture drainer that can be operated by a single person and does not require an assistant to solve the problems mentioned in the background art.

In order to achieve the above object, the present invention provides the following technical solutions including a puncture needle and a drainage tube, and also includes a suction device, and the puncture needle and the suction device are respectively connected to two ends of the drainage tube;

The puncture needle is provided with a fixing device for fastening the puncture needle on the patient's skin surface, and the other end of the puncture needle opposite to the needle is provided with a fixing seat,

The side of the fixed seat adjacent to the puncture needle is also provided with an adjustment mechanism to adjust the discharge flow rate of the needle, and the other end of the fixed seat opposite to the puncture needle is provided with a soft pressing block. The side adjacent to the adjustment mechanism is also fixedly connected with a hollow connecting column, and a connecting channel is opened in the fixed seat, one end of the connecting column communicates with the drainage tube, and the other end of the connecting column communicates with the drainage tube through the connecting channel. The puncture needles are connected to each other;

A pressure sensor is also arranged between the pressing block and the fixed seat, and a wireless transmitter is also arranged between the pressure sensor and the fixed seat. The pressure sensor includes a base and a detection surface arranged on the base, and the detection surface Fitted with the pressing block, the base is coupled to the wireless transmitter to send the pressure signal to the wireless transmitter, and the wireless transmitter forwards the pressure signal to an external device.

As a further improvement of the present invention, a vibration motor is provided inside the wireless transmitter, the vibration motor is coupled to a pressure sensor, and the pressure sensor is set with a pressure fluctuation threshold. When the pressure signal detected by the pressure sensor When the fluctuation exceeds the pressure fluctuation threshold, the pressure sensor sends a vibration signal to the vibration motor, and the vibration motor starts vibration.

As a further improvement of the present invention, the pressing block is made of rubber material, and the side of the pressing block facing away from the pressure sensor is also provided with a first anti-slip pattern, and the first anti-slip pattern consists of a plurality of concentrically arranged convex composed of rings.

As a further improvement of the present invention, two sets of second anti-slip lines are provided on the end of the fixing seat opposite to the needle, and the two sets of second anti-slip lines are respectively arranged on both sides of the puncture needle, and the second anti-slip lines are arranged concentrically. It is composed of a plurality of sequentially increasing convex rings.

As a further improvement of the present invention, the fixing device includes a fastener, a fixing layer and an adhesive layer for sticking to the skin, the adhesive layer is attached to one side of the fixing layer, and the fastener is arranged on the fixing layer On the opposite side of the viscous layer, the puncture needle penetrates the fixed layer and the viscous layer, and the fastener includes a lock and a fastener, the lock is fixedly connected to the fixed layer, and the fastener is hinged on the On one side of the lock piece, a first clamping portion is fixedly connected to the lock piece, a second clamping portion is fixedly connected to the fastener, and the first clamping portion and the second clamping portion are connected to each other. fit to secure the needle.

As a further improvement of the present invention, rubber blocks are provided on one side of the first clamping part and the second clamping part for clamping the puncture needle, when the first clamping part and the second clamping part fix the puncture needle At the same time, the two rubber blocks clamp the puncture needle.

As a further improvement of the present invention, the suction device includes a one-way liquid inlet valve, a one-way liquid outlet valve and a syringe barrel, and the one-way liquid inlet valve and one-way liquid outlet valve are both arranged on the end surface of the syringe barrel , the one-way liquid inlet valve is connected to the connecting column through the drainage tube to guide the effusion from the connecting column into the syringe barrel, and the one-way liquid outlet valve is connected to the external liquid storage device to guide the effusion from the syringe barrel Export to external liquid storage device.

As a further improvement of the present invention, the one-way liquid inlet valve includes a valve seat and a rubber disc, the valve seat is provided with an inlet and an outlet, the inlet is connected and communicated with the drainage tube, and the outlet is connected with the interior of the syringe barrel And connected, the rubber valve flap is a rubber bump with a gap in the middle, the rubber bump is arranged between the inlet and the outlet, and the part close to the gap protrudes toward the syringe barrel, and the inlet is provided with an inner A baffle, the outlet is provided with an outer baffle, and the outer baffle protrudes outward along the raised part of the rubber bump, when the liquid flows from the inlet to the outlet, the rubber bump is in conflict with the outer baffle, The slit is opened, and when the liquid flows from the outlet to the inlet, the rubber bump is against the inner baffle, and the slit is closed.

As a further improvement of the present invention, the adjustment mechanism includes a screw rod, a cuboid block and a rotary head with teeth on the side. Rotatingly connected to the fixed seat, the stopper is set in the connecting channel, one end of the screw rod is fixedly connected to the swivel head, and the other end penetrates the fixed seat into the connecting channel and is threadedly connected with the stopper

The beneficial effect of the present invention is that a suction device is provided, so that the fluid in the peritoneal cavity can be absorbed by the suction effect. Compared with the existing natural flow out through pressure, this scheme can further provide power and make the fluid flow The outflow is more effective, and a fixing device is set, so that when the doctor inserts the puncture needle, the puncture needle can be fixed on the surface of the patient's abdominal cavity through the fixing device, and the puncture needle can be clamped without the assistant, which can avoid the assistant's mistakes and reduce The labor force is reduced, and the pressure sensor is set up, so that the instantaneous pressure change when the puncture needle penetrates the abdominal cavity can be detected, and then the pressure signal is sent to the external device through the set wireless transmitter, which can better provide doctors with observation, and also It is better to remind the doctor to prevent the internal organs from being injured by excessive puncture.

Description of drawings

Figure 1 is a schematic diagram of a front view of a puncture needle;

Figure 2 is a schematic side view of the puncture needle;

Fig. 3 is a top view diagram of the puncture needle;

Figure 4 is a schematic view of the puncture needle looking up;

Fig. 5 is a schematic diagram of the overall structure of the present invention;

Fig. 6 is a partial block diagram of the circuit of the present invention;

Fig. 7 is a schematic diagram of the structure of the fixing device;

Fig. 8 is a structural schematic diagram of the adjustment mechanism.

Detailed ways

The present invention will be described in further detail below in conjunction with the embodiments given in the accompanying drawings.

Referring to Fig. 1 to Fig. 8, a kind of peritoneal puncture drain device of the present embodiment includes a puncture needle 1 and a drainage tube 2, and also includes a suction device 3, and the puncture needle 1 and the suction device 3 are respectively connected to the drainage tube both ends of 2;

The puncture needle 1 is provided with a fixing device 11 for fastening the puncture needle 1 on the patient's skin surface, and the other end of the puncture needle 1 opposite to the needle is provided with a fixing seat 12,

The side of the fixed seat 12 adjacent to the puncture needle 1 is also provided with an adjustment mechanism 121 to adjust the discharge flow rate of the needle, and the other end of the fixed seat 12 opposite to the puncture needle 1 is provided with a soft pressing block 122 A hollow connecting column 123 is fixedly connected to the side of the fixing seat 12 adjacent to the adjusting mechanism 121, and a connecting channel 124 is opened in the fixing seat 12, and one end of the connecting column 123 is connected to the drainage tube 2. The other end of the connecting column 123 communicates with the puncture needle 1 through the connecting channel 124;

A pressure sensor 125 is also provided between the pressing block 122 and the fixed seat 12, and a wireless transmitter 126 is also provided between the pressure sensor 125 and the fixed seat 12. The pressure sensor 125 includes a base and a The detection surface is attached to the pressing block 122, and the base is coupled to the wireless transmitter 126 to send a pressure signal to the wireless transmitter 126, and the wireless transmitter 126 forwards the pressure signal to an external device.

Through the above-mentioned technical solution, the pressure sensor 125 can be an existing circuit based on strain gauges, and its structure and principle are simple and low in cost. 1 At the moment of penetrating the abdominal cavity, the pressure sensor 125 will detect a large fluctuation in the pressure moment, so that the pressure sensor 125 will send a pressure signal to the wireless transmitter 126, and then the wireless transmitter 126 will send the pressure signal to an external device, Here the wireless transmitter 126 can be a wireless communication device based on bluetooth, etc., and the external device can be a display and a mobile phone, etc., and then the doctor can fix the puncture needle 1 on the patient's abdominal skin surface by using the fixing device 11, so that it can be saved. The assistant clamps the puncture needle 1 with a tool, which avoids improper operation of the assistant, and unskilled operation of the puncture needle 1 and damage to the internal organs. At the same time, it can also reduce labor and save labor costs. Then the abdominal cavity can be removed through the suction device 3. The effusion in the patient's body is sucked from the needle of the puncture needle 1 and then enters the connecting channel 124, then passes through the connecting column 123, enters the drainage tube 2, and then enters the suction device 3. Compared with natural flow through pressure To put it bluntly, the suction device 3 can provide a better suction effect, and the adjustment mechanism 121 can also be adjusted to adjust the discharge flow rate of the needle when suctioning the effusion, so that the speed of suction can be better controlled, and excessive decompression of the abdominal cavity can be avoided. quickly and cause harm to the patient.

As an improved specific implementation, the wireless transmitter 126 is also provided with a vibration motor inside, the vibration motor is coupled to the pressure sensor 125, the pressure sensor 125 is set with a pressure fluctuation threshold, when the pressure sensor 125 When the detected fluctuation of the pressure signal exceeds the pressure fluctuation threshold, the pressure sensor 125 sends a vibration signal to the vibration motor, and the vibration motor starts vibration.

Through the above-mentioned technical scheme, the vibrating motor here is the same as the micromotor used in the mobile phone. When the pressure sensor 125 detects the change of pressure, there will be a momentary feeling of falling when the puncture needle 1 penetrates the abdominal cavity. At this time, the pressure sensor 125 Instantaneous pressure fluctuations will be detected, and the pressure fluctuations of this sense of loss will exceed the set pressure fluctuation threshold, so that the pressure sensor 125 will send a vibration signal to the vibration motor, so that the vibration motor will start to vibrate, and this can be amplified. The sense of emptiness reminds the doctor to prevent the doctor from inserting the puncture needle 1 too deeply and hurting the viscera inside the abdominal cavity, so as to better instruct inexperienced doctors and improve safety.

As an improved specific embodiment, the pressing block 122 is made of rubber material, and the side of the pressing block 122 facing away from the pressure sensor 125 is also provided with a first anti-slip pattern 127, and the first anti-slip pattern 127 is formed by concentrically arranged It is composed of a plurality of sequentially increasing convex rings.

Through the above technical solution, when the doctor needs to insert the puncture needle 1 into the patient's abdominal cavity, he can press the pressing block 122 with his thumb, and press the puncture needle 1 smoothly by pressing the thumb on the first anti-skid pattern 127. The pressing block 122 can provide a certain cushioning and friction function, so that the doctor's discomfort can be reduced, and the fingers can be prevented from slipping out of the pressing block 122 when pressing, which may hurt the patient. The first setting The anti-slip pattern 127 can further increase the friction and further increase the safety. At the same time, the first anti-slip pattern is composed of a plurality of circles of different sizes, so that the friction can be increased in all directions, and the anti-slip ability improved in all directions, compared with ordinary vertical The first anti-skid pattern has a better effect.

As an improved specific embodiment, the end of the fixing seat 12 opposite to the needle head is also provided with two sets of second anti-slip lines 128, and the two sets of second anti-slip lines 128 are respectively arranged on both sides of the puncture needle 1. The anti-skid pattern 128 is composed of a plurality of concentrically arranged protruding rings which increase in size.

Through the above technical solution, the two sets of second anti-skid lines 128 provided on the fixed seat 12 can be used for the fit of the index finger and the middle finger, and a better force application point can be provided by pressing the pressing block 122 with the thumb, and the anti-skid function is further increased at the same time. The flexibility in handling the puncture needle 1 is also increased.

As an improved specific embodiment, the fixing device 11 includes a fastener 111, a fixing layer 112 and an adhesive layer 113 for sticking to the skin, and the adhesive layer 113 is attached to one side of the fixing layer 112, so The fastener 111 is arranged on the fixing layer 112 on the opposite side of the viscous layer 113, the puncture needle 1 penetrates the fixing layer 112 and the viscous layer 113, and the fastener 111 includes a lock 1111 and a fastener 1112, The lock 1111 is fixedly connected to the fixed layer 112, the fastener 1112 is hinged on one side of the lock 1111, the lock 1111 is fixedly connected with a first clamping part 1113, the fastener 1112 A second clamping part 1114 is fixedly connected to the upper part, and the first clamping part 1113 and the second clamping part 1114 cooperate to fix the puncture needle 1 .

Through the above technical solution, when the doctor needs to fix the puncture needle 1 on the skin surface of the patient's abdomen, the lock piece 1111 is separated from the fastener piece 1112, and then the fixing layer 112 is slid, and the adhesive layer 113 is pasted on the skin surface of the patient's abdomen. In this way, the fixing member 112 can be fixed on the skin surface of the patient's abdomen, and then the locking member 1111 and the fastener 1112 are fastened together. At this time, the first clamping part 1113 and the second clamping part 1114 will cooperate with each other to fix the puncture. needle 1, so that the puncture needle 1 can be prevented from sliding, further improving safety, and it is also convenient for doctors to carry out follow-up operations with both hands.

As an improved specific implementation, the first clamping part 1113 and the second clamping part 1114 are provided with a rubber block 1115 on one side for clamping the puncture needle, when the first clamping part 1113 and the second clamping part 1113 When the clamping part 1114 fixes the puncture needle 1 , the two rubber blocks 1115 clamp the puncture needle 1 together.

Through the above technical solution, by setting the rubber block 1115 on the first clamping part 1113 and the second clamping part 1114, and then clamping the puncture needle 1 through the rubber block 1115, it can be used as the first clamping part 11 1 3 When clamping the puncture needle 1 with the second clamping part 1114, there is a rubber block 1115 for buffering, which can prevent the clamping force from being too large, causing the puncture needle 1 to bend or break, which will cause a safety hazard. At the same time, the rubber block 1115 can Increase the friction to further secure the puncture needle 1115.

As an improved specific embodiment, the suction device 3 includes a one-way liquid inlet valve 31 and a one-way liquid outlet valve 32 and a syringe barrel, and the one-way liquid inlet valve 31 and the one-way liquid outlet valve 32 are both provided with On the end face of the syringe barrel, the one-way liquid inlet valve 31 is connected to the connecting column 123 through the drainage tube 2, so as to guide the accumulated liquid from the connecting column 123 into the syringe barrel, and the one-way liquid outlet valve 32 is connected to the external reservoir. Fluid device connection to guide fluid from the syringe barrel to an external reservoir.

Through the above-mentioned technical scheme, when the doctor needs to absorb the effusion in the patient's abdominal cavity, he only needs to pull the syringe needle, and then, the same as the existing syringe, the effusion in the patient's abdominal cavity can be passed through the puncture needle through the action of the piston. 1 and then pass through the connecting channel 124, the connecting column 123, the drainage tube 2 and the one-way liquid inlet valve 31, so that the effusion can be sucked into the syringe, and then the syringe barrel can be squeezed, which can also be achieved under the action of the piston. Squeeze the effusion and introduce it to the external liquid storage device through the one-way liquid outlet valve 32 for connection. The external liquid storage device can be a liquid storage bag with a measuring range, etc. 32 and the syringe barrel can achieve better speed control, and can also better provide suction power, which is convenient for doctors to operate.

As an improved specific embodiment, the one-way liquid inlet valve 31 includes a valve seat 311 and a rubber disc 312, the valve seat 311 is provided with an inlet and an outlet, and the inlet is connected and communicated with the drainage tube 2, The outlet is connected and communicated with the inside of the syringe barrel, and the rubber valve flap 312 is a rubber bump with a gap in the middle, the rubber bump is arranged between the inlet and the outlet, and the part close to the gap protrudes toward the syringe barrel , the inlet is provided with an inner baffle 314, the outlet is provided with an outer baffle 313, and the outer baffle 313 protrudes outward along the raised part of the rubber bump, when the liquid flows from the inlet to the outlet , the rubber bumps collide with the outer baffle 313, and the gap opens; when the liquid flows from the outlet to the inlet, the rubber bumps collide with the inner baffle 314, and the gap closes.

Through the above technical scheme, the rubber disc 312 provided has good elasticity and recovery effect, so that the sealing performance is good, and the inlet and outlet of the valve seat 311 can be well isolated. The outer baffle 313 provided It can better protect the rubber valve disc 312, and at the same time prevent the gap on the rubber valve disc 312 from opening too large, and can better fix the rubber valve disc 312. The structure of the inner retainer 314 can be used to support the rubber valve disc 312, so that the barrier effect of the rubber valve disc 312 can be enhanced, and the gap of the rubber valve disc 312 can be prevented from opening reversely under greater pressure. The structure of the one-way liquid outlet valve 32 and the one-way liquid inlet valve 31 is the same , the same effect can be achieved.

As an improved specific implementation, the adjustment mechanism 121 includes a screw rod 1211, a cuboid block 1212 and a rotary head 1213 with teeth on the side, and the section of the connecting channel 124 is adapted to the block 1212 The swivel head 1213 is rotatably connected to the fixed seat 12, the stopper 1212 is set in the connecting channel 124, one end of the screw rod 1211 is fixedly connected to the swivel head 1213, and the other end is fixed through the The seat 12 is threadedly connected with the stopper 1212 after entering the connecting channel 124 .

Through the above technical solution, when the doctor needs to further regulate the flow rate of the effusion, he can turn the rotary head 1213, and then the rotary head 1213 drives the screw rod 1211 to rotate, because the connecting channel 124 and the stopper 1212 are compatible, so The stopper 1212 will be moved along the screw rod 1211 in the connecting passage 124 under mutual cooperation, and when the stopper 1212 moves to the position of the connecting post 123, the connecting post 123 can be blocked so that the connecting post 123 can be carried out. Occlusion can prevent the effusion from flowing out from the connecting column 123, and the maximum flow rate can be controlled by adjusting the block 1212 to block the area of the connecting column 123, so that the flow rate of the effusion can be regulated to prevent the patient from decompressing the peritoneal cavity If it is too fast to cause discomfort, the teeth on the swivel head 1213 can increase the friction, making it more convenient to turn the swivel head 1213.

The above descriptions are only preferred implementations of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions under the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principles of the present invention should also be regarded as the protection scope of the present invention.

Claims (9)

1. a kind of Therapeutic paracentesis device, including puncture needle (1) and drainage tube (2), which is characterized in that further include suction means (3), the puncture needle (1) and suction means (3) are connected to the both ends of drainage tube (2)；

The puncture needle (1) is equipped with the fixing device (11) for puncture needle (1) to be fastened on to patient skin surface, described to wear Fixed seat (12) is set with respect to the other end of syringe needle on pricker (1),

The side adjacent with puncture needle (1) of the fixed seat (12) is additionally provided with regulating mechanism (121), to adjust putting for syringe needle Flow velocity, the fixed seat (12) are provided with soft briquetting (122), the fixed seat with respect to the other end of puncture needle (1) (12) the one side adjacent with regulating mechanism (121) is also fixedly connected with hollow connecting pole (123), the fixed seat (12) Interface channel (124) is inside offered, one end and the drainage tube (2) of the connecting pole (123) are interconnected, the connecting pole (123) the other end is interconnected by interface channel (124) and puncture needle (1)；

Pressure sensor (125), the pressure sensor are additionally provided between the briquetting (122) and fixed seat (12) (125) wireless transmitter (126) is additionally provided between fixed seat (12), the pressure sensor (125) is including pedestal and sets The detection faces on pedestal are put, the detection faces fit with briquetting (122), and the pedestal is coupled to wireless transmitter (126), wireless transmitter (126) is given to send pressure signal, pressure signal is forwarded to outside by the wireless transmitter (126) Equipment.

2. Therapeutic paracentesis device according to claim 1, it is characterised in that：Inside the wireless transmitter (126) also Vibration motor is provided with, the vibration motor is coupled to pressure sensor (125), and the pressure sensor (125) is provided with pressure Fluctuation threshold value, it is described when the fluctuation of pressure signal that the pressure sensor (125) detects is more than pressure oscillation threshold value Pressure sensor (125) sends vibration signal to vibration motor, and the vibration motor opens vibrations.

3. Therapeutic paracentesis device according to claim 2, it is characterised in that：The briquetting (122) is rubber material, The briquetting (122) is additionally provided with the first anti-skid chequer (127), first anti-skid chequer on one side backwards to pressure sensor (125) (127) it is composed of the multiple bulge loops being sequentially increased being arranged concentrically.

4. Therapeutic paracentesis device according to claim 3, it is characterised in that：The fixed seat (12) is with respect to the one of syringe needle End is additionally provided with two group of second anti-skid chequer (128), and two group of second anti-skid chequer (128) is separately positioned on the both sides of puncture needle (1), described Second anti-skid chequer (128) is composed of the multiple bulge loops being sequentially increased being arranged concentrically.

5. Therapeutic paracentesis device according to claim 4, it is characterised in that：The fixing device (11) is including fastener (111), fixed bed (112) and for being bonded the viscous layer of skin (113), the viscous layer (113) is fitted in fixed bed (112) Side, the fastener (111) is arranged on the opposite side of relative tack layer (113) on fixed bed (112), the puncture needle (1) fixed bed (112) and viscous layer (113) are penetrated, the fastener (111) includes latch fitting (1111) and fastener (1112), institute Latch fitting (1111) to be stated to be fixedly connected on fixed bed (112), the fastener (1112) is hinged in a side of latch fitting (1111), The first sandwich part (1113) is fixedly connected on the latch fitting (1111), the second clamping is fixedly connected on the fastener (1112) Portion (1114), first sandwich part (1113) and the second sandwich part (1114) match, to fix puncture needle (1).

6. Therapeutic paracentesis device according to claim 5, it is characterised in that：First sandwich part (1113) and second Sandwich part (1114) is equipped with rubber block (1115) for the side of clamping puncture needle, when the first sandwich part (1113) and second press from both sides When puncture needle (1) is fixed in conjunction portion (1114), puncture needle (1) is lived in two rubber block (1115) clampings.

7. Therapeutic paracentesis device according to claim 1, it is characterised in that：The suction means (3) is including unidirectionally entering Liquid valve (31) and unidirectional liquid valve (32) and injector syringe, the unidirectional liquid-inlet valve (31) and unidirectional liquid valve (32) are all provided with It puts on the end face of injector syringe, the unidirectional liquid-inlet valve (31) is connect by drainage tube (2) with connecting pole (123), will Hydrops imports injector syringe from connecting pole (123), and the unidirectional liquid valve (32) connect with external device for storing liquid, by hydrops External device for storing liquid is exported to from injector syringe.

8. Therapeutic paracentesis device according to claim 7, it is characterised in that：The unidirectional liquid-inlet valve (31) is including valve seat (311) and rubber flap (312), the valve seat (311) are equipped with entrance and exit, and the entrance is connect simultaneously with drainage tube (2) Connection is exported with being connected to and in communication with inside injector syringe, and the rubber flap (312) opens apertured rubber convex for centre Block, the rubber convex block are arranged between entrance and exit, and close to gap be partially toward injector syringe protrusion, it is described Entrance is equipped with interior catch (314), and the outlet is equipped with outer catch (313), and the outer catch (313) is along rubber convex block Projection portion outwardly convex, when liquid is flowed to from entrance to be exported, rubber convex block and outer catch (313) are inconsistent, and gap is opened, When liquid flows to entrance from outlet, rubber convex block offsets with interior catch (314), and gap is closed.

9. Therapeutic paracentesis device according to claim 1, it is characterised in that：The regulating mechanism (121) is including screw (1211), the block (1212) of cuboid and side are provided with the rotation head (1213) of tooth, and the section of the interface channel (124) is in The rectangle being adapted with block (1212), the rotation head (1213) are rotatably attached in fixed seat (12), the block (1212) it is arranged in interface channel (124), one end of the screw (1211) is fixedly connected on rotation head (1213), the other end It penetrates after fixed seat (12) is entered in interface channel (124) and is threadedly coupled with block (1212).