CN112472882B

CN112472882B - Thoracocentesis drainage device

Info

Publication number: CN112472882B
Application number: CN202011350182.7A
Authority: CN
Inventors: 戴威; 舒丹妮; 戴元荣
Original assignee: Second Affiliated Hospital and Yuying Childrens Hospital of Wenzhou Medical University
Current assignee: Second Affiliated Hospital and Yuying Childrens Hospital of Wenzhou Medical University
Priority date: 2020-11-26
Filing date: 2020-11-26
Publication date: 2023-03-14
Anticipated expiration: 2040-11-26
Also published as: CN112472882A

Abstract

The invention relates to a thoracic cavity puncture drainage device which comprises a puncture catheter, a drainage catheter and a drainage bag, wherein the tail end of the puncture catheter is connected with the drainage catheter, the drainage catheter is connected with the drainage bag, the drainage catheter comprises a rear catheter section connected with the drainage bag, a front catheter section connected with the puncture catheter and a connecting device for connecting the rear catheter section and the front catheter section, the connecting device comprises a three-way connecting pipe, the three-way connecting pipe comprises a first end pipe, a second end pipe and a third end pipe, the first end pipe and the second end pipe of the three-way connecting pipe are respectively connected with the front catheter section and the rear catheter section, a liquid pumping connecting pipe head is arranged at the third end pipe of the three-way connecting pipe, a sealing cover is matched with the liquid pumping connecting pipe head, an injector is connected with the liquid pumping connecting pipe head, a first one-way valve allowing the front catheter section to be in one-way communicated with an inner cavity of the three-way connecting pipe is arranged in the first end pipe, and a second one-way valve allowing the inner cavity of the three-way communicated with the rear catheter section is arranged in the second end pipe. Has the advantages of reliable structure and simple and convenient operation.

Description

Thoracentesis drainage device

Technical Field

The invention relates to the technical field of medical instruments, in particular to a thoracocentesis drainage device.

Background

In clinic, the thoracoabdominal cavity puncture drainage operation is often carried out, the effusion is drained out for the patient with the thoracoabdominal cavity filled with the thoracoabdominal cavity so as to relieve the pain of the patient, and part of the patients need to puncture repeatedly. The puncture drainage device adopted clinically at present consists of a puncture needle, an injector and a rubber tube connecting the puncture needle and the injector. When the operation is performed, after the syringe is fully pumped with effusion, the rubber tube is clamped by the hemostatic forceps, the syringe is separated from the rubber tube, the effusion in the syringe is discharged, and then the rubber tube is connected again.

In order to solve the above problems, as disclosed in the document with chinese patent No. cn201622192. X, entitled pleuroperitoneal cavity puncture drainage device (No. CN 205796117U), the main structure thereof is as follows: including puncture catheter, 2cc cylinder, drainage tube and drainage bag, the drainage tube includes three branch pipes of branch pipe A, branch pipe B and branch pipe C that communicate each other, branch pipe A's mouth of pipe is equipped with pagoda joint, set up the through-hole with the inside intercommunication of branch pipe A on the pagoda joint, be equipped with murphy's burette and speed governing switch on the branch pipe B, the drainage bag is connected to branch pipe B's lower extreme, be equipped with the leakage fluid dram on the drainage bag, the inside check valve that is equipped with of branch pipe C, branch pipe C's mouth of pipe is equipped with the heparin cap, 2cc cylinder injection end with puncture catheter cooperation, the injection end of 2cc cylinder is inserted and is established in the puncture catheter, the barrel cooperation of pagoda joint and 2cc cylinder on the drainage tube, pagoda joint on the drainage tube inserts the inside of the barrel of establishing at 2cc cylinder. However, for some patients with much effusion, the effusion still needs to be extracted manually and quickly in the early stage, and drainage operation is adopted in the later stage; above-mentioned structure utilizes the barrel of cylinder as the connecting piece, and the drainage needs later stage equipment operation, still is conventional drawing liquid operation earlier stage, uses inconveniently, and the smooth wall of cylinder inner wall for supplying the piston action, and when its equipment that is used for the later stage, the firm reliability of equipment can not obtain the abundant guarantee.

Disclosure of Invention

The invention aims to: in order to overcome the defects in the prior art, the invention provides the thoracocentesis drainage device which is reliable in structure and simple and convenient to operate.

In order to realize the purpose, the invention provides the following technical scheme:

the utility model provides a thoracentesis drainage device, includes puncture catheter, drainage catheter and drainage bag, puncture catheter's trailing end connection drainage catheter, drainage bag, its characterized in that are connected to drainage catheter: the drainage catheter comprises a rear catheter section, a front catheter section and a connecting device, wherein the rear catheter section is connected with the drainage bag, the front catheter section is connected with the puncture catheter, the connecting device is connected with the rear catheter section and the front catheter section and comprises a three-way connecting pipe, the three-way connecting pipe comprises a first end pipe, a second end pipe and a third end pipe, the first end pipe and the second end pipe of the three-way connecting pipe are respectively connected with the front catheter section and the rear catheter section, the third end pipe of the three-way connecting pipe is provided with a liquid pumping connecting pipe head, the liquid pumping connecting pipe head is provided with a sealing cover, the liquid pumping connecting pipe head is connected with an injector, a first one-way valve allowing the front catheter section to conduct towards the inner cavity of the three-way connecting pipe in one way is arranged in the first end pipe, and a second one-way valve allowing the inner cavity of the three-way connecting pipe to conduct towards the rear catheter section in one way is arranged in the second end pipe.

By adopting the technical scheme, when liquid is required to be pumped, the sealing cover on the liquid pumping connector head is uncovered, the syringe is connected to the liquid pumping connector head, the accumulated liquid is pushed into the drainage bag after being pumped, the syringe is repeatedly operated to realize rapid pumping of the accumulated liquid, and the sealing cover is used for sealing the liquid pumping connector head after the pumping of the accumulated liquid is finished, so that normal drainage operation is realized; the drainage tube has the advantages of convenient effusion suction operation, no need of middle assembly operation, convenient operation and capability of ensuring the reliability of integral connection of the drainage tube.

Preferably, a valve core mechanism for opening and closing the third end pipe is arranged in the three-way connecting pipe, the second one-way valve has a one-way conduction state and a normally open state, the valve core mechanism synchronously drives the second one-way valve to be in the normally-open state when the third end pipe is closed, and the second one-way valve is in the one-way conduction state when the third end pipe is opened. Under this structural design, adopt case mechanism to carry out on-off control with third end pipe, convenient operation avoids when pulling out the syringe operation, and the unexpected outflow of hydrops in the tee bend coupling pipe simultaneously when pulling out the drawing liquid operation, can realize the hydrops drainage time through first check valve realization protection against the current, reduces hydrops drainage resistance, guarantees that the drainage operation is reliable with the control at normal open state with the second check valve control.

Preferably, the first end pipe and the second end pipe are located on the same axis, the third end pipe is located in the radial direction of the axis where the first end pipe and the second end pipe are distributed, the valve core mechanism comprises a cylindrical valve core main body, the cylindrical valve core main body is axially and slidably matched in a pipe cavity of the three-way connecting pipe, flow guide holes which are used for communicating the pipe orifice of the third end pipe with the inner cavity of the cylindrical valve core main body and a port sealing part which closes the pipe orifice of the third end pipe are axially distributed in the cylindrical valve core main body, the flow guide holes are correspondingly matched with the pipe orifice of the third end pipe, a pushing part which is used for driving the second one-way valve to be in a normally open state is arranged on one axial direction of the cylindrical valve core main body towards one port of the second one-way valve, and the cylindrical valve core main body is matched with an operating assembly which is used for driving the cylindrical valve core main body to axially move. Under this structural design, the tube-shape case main part relies on circumference lateral wall and axial position, realizes same tube-shape case main part synchro control third end pipe and second check valve, has simple structure compactness, the reliable operation's advantage.

Preferably, the second one-way valve comprises an opening and closing ball, a valve seat opening is formed in the second end pipe, the opening and closing ball is correspondingly matched with the valve seat opening, the opening and closing ball is abutted to a valve core spring which drives the opening and closing ball to tend to close the valve seat opening, and the pushing part is in pushing fit with the opening and closing ball. Under the structural design, the one-way conduction is realized by adopting the spherical opening and closing ball matched with the valve core spring, so that the second one-way valve is driven to be normally controlled; and the operation of sucking and injecting hydrops by the injector can be better adapted, and the operation process is reliable.

Preferably, the pushing part comprises a thimble, a positioning concave hole is formed in the opening and closing bead, and the thimble is movably matched in the positioning concave hole in a positioning mode. With the structural design, the cylindrical valve core body is reliably matched with the opening and closing bead.

Preferably, first check valve includes the rubber support leather cup of diaphragm and bowl form, is equipped with in the first terminal pipe and corresponds complex sealed seat mouth with the diaphragm, and bellied end orientation sealed seat mouth on the rubber support leather cup, the bottom elasticity of rubber support leather cup is contradicted on the diaphragm to the elasticity reset force of diaphragm seal fit on sealed seat mouth is provided, is equipped with the fretwork hole that supplies the fluid to pass through on the rubber support leather cup. Under this structural design, first check valve adopts diaphragm formula structure, and rubber supports the leather cup and provides the elasticity holding power, and it is little to have automatic opening power, and the fluid of being convenient for passes through, and rubber supports the leather cup and is the bowl form, has the prevention that can be better against current.

Preferably, the operating component comprises a knob, a sector gear is arranged on the knob, a strip-shaped tooth surface is arranged on the cylindrical valve core main body, and the strip-shaped tooth surface is meshed with the sector gear. Under this structural design, rotate the knob, reach drive tube-shape case main part axial displacement through sector gear and bar flank of tooth to accomplish corresponding action, have simple structure, easy operation convenient advantage.

Preferably, the opening end position of the inner part of the puncture catheter, which is placed into the human body, is provided with a drainage port position adjusting saccule into which [ small 2] filler can be injected, the drainage port position adjusting saccule is made of a flexible membrane and can be flat without the filler, a thin catheter which is connected with the drainage port position adjusting saccule and is used for injecting and extracting the filler in the drainage port position adjusting saccule into and out of the drainage port position adjusting saccule is embedded in the puncture catheter, and the thin catheter is provided with a catheter connector. Under the structural design, the puncture end position of the puncture catheter is provided with the drainage port position adjusting saccule, the drainage port position adjusting saccule is empty and is flatly attached to the puncture catheter in the initial puncture stage and during tube drawing operation, so that the puncture and tube drawing operation are convenient, after the puncture catheter is placed in a human body, fillers are injected into the drainage port position adjusting saccule, different position states of the drainage port are realized according to different densities of the injected fillers [ small 3], if high-density liquid is filled, the inner port of the drainage tube body is always positioned at the bottom of pleural effusion due to the action of gravity, and the effect of draining the effusion to the maximum degree is achieved; injecting air and other objects with lighter density to float upwards, so that pneumatosis in the hydropneumothorax is preferentially discharged; the position of the drainage port is adjusted to adjust the saccule to inject fillers with different densities, so that the drainage port is guided to move up and down, and drainage tube retention at a specific anatomical position can be performed under ultrasonic guidance.

Preferably, the opening end of the inner part of the puncture catheter, which is placed into the human body, is provided with a plurality of liquid inlet branch pipes. Under this structural design, stretch out after the drainage tube main part is inserted, increase the coverage area at drainage position, because of there often being entity foreign matters such as the tissue that drops in the pleural effusion, block inside opening simultaneously, need change the whole strip drainage tube, this design can prevent the frequent change drainage tube that this condition leads to.

Preferably, be equipped with injection branch pipe and speed governing switch on the preceding leader section, be equipped with the heparin cap on the injection branch pipe, the speed governing switch is located between injection branch pipe and the tee junction pipe. Under this structural design, realize carrying out the medicine injection operation through the drainage tube, when the medicine is injected, can realize closing the pipeline UNICOM of honeycomb duct in injection branch pipe rear through the speed governing switch, realize the reliable thorax of infusing of medicine.

The invention is further described below with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic view of a thoracocentesis drainage device according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a connection device according to an embodiment of the present invention;

FIG. 3 isbase:Sub>A cross-sectional view taken along A-A of FIG. 2;

FIG. 4 is a one-way valve state diagram of a second one-way valve of a coupling device according to an embodiment of the present invention;

fig. 5 is a schematic structural view of a thoracocentesis drainage device according to an embodiment of the present invention.

Detailed Description

Referring to fig. 1 to 4, the thoracic cavity puncture drainage device disclosed by the invention comprises a puncture catheter 1, a drainage catheter 2 and a drainage bag 3, wherein the tail end of the puncture catheter 1 is connected with the drainage catheter 2, the drainage catheter 2 is connected with the drainage bag 3, the drainage catheter 2 comprises a rear catheter section 21 connected with the drainage bag 3, a front catheter section 22 connected with the puncture catheter 1 and a connecting device connected with the rear catheter section 21 and the front catheter section 22, the connecting device comprises a three-way connecting pipe 4, the three-way connecting pipe 4 comprises a first end pipe 41, a second end pipe 42 and a third end pipe 43, the first end pipe 41 and the second end pipe 42 of the three-way connecting pipe 4 are respectively connected with the front catheter section 22 and the rear catheter section 21, the third end pipe 43 of the three-way connecting pipe 4 is provided with a liquid-pumping connecting pipe head, the liquid-pumping pipe head is provided with a sealing cover (not shown in the figure), the liquid-pumping pipe head is connected with an injector 5, a first one-way valve 7 allowing the front catheter section 22 to be communicated with a one-way cavity of the three-way connecting pipe 4 is arranged in the first end pipe 41, and a one-way valve 8 allowing the second one-way connecting pipe 4 to be communicated with the rear catheter section 21 is arranged in the second end pipe 42. When liquid is required to be pumped, the sealing cover on the liquid pumping connector head is uncovered, the syringe 5 is connected to the liquid pumping connector head, the accumulated liquid is pushed into the drainage bag 3 after the accumulated liquid is pumped, the syringe 5 is repeatedly operated to realize rapid pumping of the accumulated liquid, and the sealing cover is used for sealing the liquid pumping connector head after the pumping of the accumulated liquid is finished, so that normal drainage operation is realized; the drainage tube has the advantages of convenient effusion suction operation, no need of middle assembly operation, convenient operation and capability of ensuring the reliability of integral connection of the drainage tube.

Further, in order to better adapt to the operation of liquid loading extraction and the operation of drainage, a valve core mechanism for opening and closing the third end pipe 43 is arranged in the three-way connecting pipe 4, the second check valve 8 has a one-way conduction state and a normally open state, the valve core mechanism synchronously drives the second check valve 8 to be in the normally-open state when the third end pipe 43 is closed, and the second check valve 8 is in the one-way conduction state when the third end pipe 43 is opened. Adopt case mechanism to carry out on-off control with third end pipe 43, convenient operation avoids when pulling out the operation of syringe 5, and the unexpected outflow of long-pending liquid in three way connection pipe 4, simultaneously when pulling out the drawing liquid operation, can control second check valve 8 at the normal open state, when realizing the hydrops drainage, realizes protection against the current through first check valve 7, avoids under the design of two check valves, the drainage resistance is too big, reduces hydrops drainage resistance, guarantees that the drainage operation is reliable.

Meanwhile, the first end pipe 41 and the second end pipe 42 are located on the same axis, the third end pipe 43 is located in the radial direction of the axis where the first end pipe 41 and the second end pipe 42 are distributed, the valve core mechanism includes a cylindrical valve core main body 61, the cylindrical valve core main body 61 is axially and slidably matched in the pipe cavity of the three-way connecting pipe 4, flow guide holes 611 which are used for communicating the pipe orifice of the third end pipe 43 with the inner cavity of the cylindrical valve core main body 61 and a port closing part 612 which closes the pipe orifice of the third end pipe 43 are axially distributed on the cylindrical valve core main body 61, the flow guide holes 611 are correspondingly matched with the pipe orifice of the third end pipe 43, a pushing part which is used for pushing and driving the second check valve 8 to be in a normally open state is arranged in the axial direction of the cylindrical valve core main body 61 facing to one port of the second check valve 8, and the cylindrical valve core main body 61 is matched with an operating assembly used for driving the cylindrical valve core main body 61 to axially move. The cylindrical valve core main body 61 realizes that the same cylindrical valve core main body 61 synchronously controls the third end pipe 43 and the second check valve 8 by means of the circumferential side wall and the axial position, and has the advantages of simple and compact structure and reliable operation. The cylindrical valve core main body is convenient for the circulation of accumulated liquid. The operating assembly comprises a knob 621, a sector gear 622 is arranged on the knob 621, a strip-shaped tooth surface 623 is arranged on the cylindrical valve core main body 61, and the strip-shaped tooth surface 623 is meshed with the sector gear 622. The knob 621 is rotated to drive the cylindrical valve core main body 61 to move axially through the sector gear 622 and the strip-shaped tooth surface 623, so that corresponding action is completed. Of course, as a possible solution of the present invention, the operating assembly may also employ a push button or the like.

In this embodiment, the second check valve 8 includes an opening and closing bead 81, a valve seat opening 82 is formed in the second end pipe 42, the opening and closing bead 81 is correspondingly matched with the valve seat opening 82, the opening and closing bead 81 abuts against a valve core spring 83 which drives the opening and closing bead 81 to tend to close the valve seat opening 82, and a pushing portion is in pushing fit with the opening and closing bead 81. A Y-shaped seat 421 supporting the valve core spring 83 is arranged in the second end pipe 42, and a spherical opening and closing ball 81 is matched with the valve core spring 83 to realize one-way conduction, so that the second one-way valve 8 can be driven to be normally controlled; but also can better adapt to the operations of sucking and injecting the effusion by the injector 5, and the operation process is reliable. The pushing part comprises a thimble 613, a positioning concave hole 811 is arranged on the opening and closing bead 81, and the thimble 613 is movably matched in the positioning concave hole 811 in a positioning way. So that the cylindrical valve core body and the opening and closing bead 81 are reliably matched.

First check valve 7 includes the rubber support leather cup 72 of diaphragm 71 and bowl form, is equipped with in the first end pipe 41 and corresponds the sealed seat mouth 73 of complex with diaphragm 71, and the bellied end is towards sealed seat mouth 73 on the rubber support leather cup 72, and the bottom elasticity of rubber support leather cup 72 is contradicted on diaphragm 71 to provide the elasticity reset force of sealed cooperation on sealed seat mouth 73 with diaphragm 71, be equipped with the fretwork hole 721 that supplies the fluid to pass through on the rubber support leather cup 72. Under this structural design, first check valve 7 adopts diaphragm 71 formula structure, and rubber supports leather cup 72 and provides the elasticity holding power, and it is little to have automatic opening power, and the fluid of being convenient for passes through, and rubber supports leather cup 72 and is the bowl form, has the prevention that can be better against current.

Because pleural effusion has the suspending power, the puncture tube is the hose, float above the effusion easily, influence the normal drainage, and there may exist pneumatosis in the pleural cavity too, a large amount of pneumatosis can make the lung compress apparently, the diastole is obstructed, in order to solve this problem, the position of the internal opening end of the human body where the puncture catheter 1 is placed into the human body is equipped with the drainage port position adjustment sacculus 1-1 that can inject [ small 4] filler, the filler can be water, air or other density liquid, the drainage port position adjustment sacculus 1-1 is made into the shriveled flat shape without filler by the flexible membrane, the puncture catheter 1 is embedded with the thin catheter 1-11 that is connected with the drainage port position adjustment sacculus 1-1 and is used for injecting and extracting the filler in the drainage port position adjustment sacculus 1-1, the thin catheter 1-11 is equipped with the pipe connector 1-12. The puncture position of the puncture catheter 1 is provided with a drainage port position adjusting saccule 1-1, the drainage port position adjusting saccule 1-1 is empty and is flatly attached to the puncture catheter 1 during the initial puncture period and the catheter drawing operation, so that the puncture and the catheter drawing operation are convenient, after the puncture catheter 1 is arranged in a human body, fillers are injected into the drainage port position adjusting saccule 1-1, and different positions of a drainage port can be realized according to different densities of the injected fillers, such as high-density liquid filling, so that the internal port of the drainage catheter body is always positioned at the bottom of pleural effusion due to the gravity action, and the effect of draining the effusion to the maximum degree is achieved; air and other objects with lighter density can be injected to float upwards, so that pneumatosis in the hydropneumothorax is preferentially discharged; the position of the drainage port is adjusted by adjusting the position of the drainage port, the balloon is injected with fillers with different densities, the drainage port is guided to be adjusted in the up-and-down position, and the drainage tube at a specific anatomical position can be retained under the guidance of ultrasound.

In order to facilitate the operation, a medicine injection branch pipe 221 and a speed regulating switch 222 are arranged on the front catheter section 22, a heparin cap is arranged on the medicine injection branch pipe 221, and the speed regulating switch 222 is located between the medicine injection branch pipe 221 and the three-way connecting pipe 4. The medicine injection branch pipe 221 can be internally provided with a one-way conduction valve to prevent liquid in the guide pipe from flowing back to the main branch pipe 221, and when medicine is injected, the pipeline communication of the guide pipe behind the medicine injection branch pipe can be closed through a speed regulation switch, so that the medicine can be reliably injected into the thoracic cavity.

As solid foreign matters such as cast-off tissues and the like often exist in the pleural effusion, the internal opening of the puncture catheter 1 is blocked, and the whole drainage tube needs to be replaced, as shown in fig. 5, another embodiment of the invention has the difference that a plurality of liquid inlet branch tubes 11 are arranged at the internal opening end of the puncture catheter 1 which is placed into the human body. The drainage tube body extends out after being inserted, the coverage area of a drainage part is increased, and meanwhile, the drainage tube can be prevented from being frequently replaced due to the design.

Claims

1. The utility model provides a thorax puncture drainage device, includes puncture catheter, drainage catheter and drainage bag, puncture catheter's trailing end connection drainage catheter, drainage bag, its characterized in that are connected to drainage catheter: the drainage catheter comprises a rear catheter section connected with the drainage bag, a front catheter section connected with the puncture catheter and a connecting device connected with the rear catheter section and the front catheter section, the connecting device comprises a three-way connecting pipe, the three-way connecting pipe comprises a first end pipe, a second end pipe and a third end pipe, the first end pipe and the second end pipe of the three-way connecting pipe are respectively connected with the front catheter section and the rear catheter section, the third end pipe of the three-way connecting pipe is provided with a liquid pumping connecting pipe head, the liquid pumping connecting pipe head is provided with a sealing cover and is connected with an injector, a first one-way valve allowing the front catheter section to be conducted to the inner cavity of the three-way connecting pipe in a one-way mode is arranged in the first end pipe, a second one-way valve allowing the inner cavity of the three-way connecting pipe to be conducted to the rear catheter section in a one-way mode is arranged in the second end pipe, a valve core mechanism opening and closing the third end pipe is arranged in the three-way connecting pipe, the second one-way valve is in a one-way conduction state and a normally open state, the valve core mechanism synchronously drives the second one-way valve in a normally open state when the third end pipe is opened;

the valve core mechanism comprises a cylindrical valve core main body, the cylindrical valve core main body is axially and slidably matched in a pipe cavity of the three-way connecting pipe, flow guide holes communicated with a pipe orifice of the third end pipe and an inner cavity of the cylindrical valve core main body and a port closing part for closing the pipe orifice of the third end pipe are axially distributed in the cylindrical valve core main body, the flow guide holes are correspondingly matched with the pipe orifice of the third end pipe, a pushing part used for pushing and driving the second one-way valve to be in a normally open state is arranged towards one port of the second one-way valve in the axial direction of the cylindrical valve core main body, and the cylindrical valve core main body is matched with an operating assembly used for driving the cylindrical valve core main body to axially move.

2. The thoracentesis drainage device of claim 1, wherein: the second one-way valve comprises an opening and closing bead, a valve seat opening is formed in the second end pipe, the opening and closing bead is correspondingly matched with the valve seat opening, a valve core spring for driving the opening and closing bead to tend to close the valve seat opening is abutted to the opening and closing bead, and the pushing part is in pushing fit with the opening and closing bead.

3. The thoracentesis drainage device of claim 2, wherein: the pushing portion comprises a thimble, a positioning concave hole is formed in the opening and closing bead, and the thimble is movably matched in the positioning concave hole in a positioning mode.

4. The thoracentesis drainage device of claim 1, wherein: the operating assembly comprises a knob, a sector gear is arranged on the knob, a strip-shaped tooth surface is arranged on the cylindrical valve core main body, and the strip-shaped tooth surface is meshed and matched with the sector gear.

5. The thoracocentesis drainage device of claim 1, wherein: first check valve includes the rubber support leather cup of diaphragm and bowl form, is equipped with in the first terminal pipe and corresponds complex sealed seat mouth with the diaphragm, and the bellied end is towards sealed seat mouth on the rubber support leather cup, and the bottom elasticity that the rubber supported the leather cup is contradicted on the diaphragm to provide the elasticity reset force of cooperating the diaphragm seal on sealed seat mouth, be equipped with the fretwork hole that supplies the fluid to pass through on the rubber support leather cup.

6. The thoracentesis drainage device of claim 1, wherein: the utility model discloses a puncture catheter, including puncture catheter, drainage mouth position adjustment sacculus, puncture catheter, flexible membrane, the inside open end position of putting into the human body that puncture catheter put into the human body is equipped with the drainage mouth position adjustment sacculus that can pour into the filler into, and drainage mouth position adjustment sacculus is made for the flexible membrane and can becomes flat form flat at no filler, buries underground in the puncture catheter with drainage mouth position adjustment sacculus be connected, be used for to pour into in the drainage mouth position adjustment sacculus and take out the thin pipe of drainage mouth position adjustment sacculus filler, be equipped with the union coupling head on the thin pipe.

7. The thoracocentesis drainage device of claim 1, wherein: the inner opening end of the puncture catheter which is put into the human body is provided with a plurality of liquid inlet branch pipes.

8. The thoracentesis drainage device of claim 1, wherein: and a medicine injection branch pipe and a speed regulating switch are arranged on the front guide pipe section, a heparin cap is arranged on the medicine injection branch pipe, and the speed regulating switch is positioned between the medicine injection branch pipe and the three-way connecting pipe.