Valve assembly and tissue biopsy device

Abstract

The valve assembly comprises a connecting mechanism, a negative pressure source, a liquid source, a first valve and a second valve, the first valve and the second valve are arranged on the two sides of the connecting mechanism, the first valve is provided with a first inlet, a first outlet, a second inlet and a second outlet, and the second valve is provided with a second inlet and a second outlet. The second valve is provided with a third inlet and a third outlet, the negative pressure source is communicated with the first inlet and the second inlet, the liquid source is communicated with the third inlet, and the first outlet, the second outlet and the third outlet are suitable for being communicated with a catheter assembly of the tissue biopsy device. The first valve is arranged to selectively provide vacuum for the guide pipe assembly through the first outlet or the second outlet, the second valve is arranged to selectively provide liquid for the guide pipe assembly through the third outlet, and negative pressure of the first outlet and the second outlet and liquid control of the third outlet are achieved by controlling the first valve and the second valve. And the tissue biopsy device can be conveniently and accurately operated by personnel.

Description

TECHNICAL FIELD

[0001] The utility model relates to the biopsy technical field especially a valve assembly and tissue biopsy device. BACKGROUND

[0002] The entity or cystic solid mass of organism is the common disease. So far, in the clinical medical treatment, in addition to the auxiliary diagnosis such as ultrasonic blood examination, tomography and nuclear magnetic resonance imaging, the most important thing is that a small amount of mass tissue can be obtained through the microtrauma means to carry out pathological examination, and it is the most important examination means before the thorough treatment. The current tissue biopsy method is to puncture into the mass by the puncture knife of tissue biopsy device, and the principle of negative pressure suction of syringe is used to obtain a little mass tissue for diagnosis or directly cut the mass tissue for treatment, which has the advantages of small surgical trauma, good healing, small residual scar, small damage and quick recovery, and therefore is loved by medical staff.

[0003] The tissue biopsy device needs to adjust the negative pressure suction lesion tissue through the valve assembly during work, and also needs to provide physiological saline and other liquids to the lesion tissue through the valve assembly, but the existing valve assembly structure is relatively complex and inconvenient to operate.

[0004] Therefore, the utility model is committed to providing a valve assembly and tissue biopsy device to solve the above problems. UTILITY MODEL CONTENT

[0005] The utility model discloses a valve assembly and tissue biopsy device, realize the first outlet and the second outlet for the catheter assembly to provide vacuum through the first valve, realize the third outlet for the catheter assembly to provide liquid through the second valve, and then the accurate control of tissue biopsy device is convenient, has simple structure, convenient operation and other characteristics.

[0006] The utility model provides the technical scheme as follows:

[0007] A valve assembly, comprising a connecting mechanism, a first valve, a second valve, a negative pressure source and a liquid source, the first valve and the second valve are arranged on both sides of the connecting mechanism, the first valve is provided with a first inlet, a first outlet, a second inlet and a second outlet, the second valve is provided with a third inlet and a third outlet.

[0008] The negative pressure source is communicated with the first inlet and the second inlet, the liquid source is communicated with the third inlet, and the first outlet, the second outlet and the third outlet are adapted to be communicated with the catheter assembly of the tissue biopsy device.

[0009] The first valve is configured to selectively provide vacuum to the conduit assembly through the first outlet or the second outlet, and the second valve is configured to selectively provide liquid to the conduit assembly through the third outlet.

[0010] In some embodiments, a first conduit, a second conduit and a third conduit are further included, one end of the first conduit is in communication with the first outlet, and the other end of the first conduit is adapted to be in communication with the conduit assembly.

[0011] One end of the second conduit is in communication with the second outlet, and the other end of the second conduit is adapted to be in communication with the conduit assembly.

[0012] One end of the third conduit is in communication with the third outlet, and the other end of the third conduit is in communication with the second conduit.

[0013] In some embodiments, the first valve includes a first valve core and a first valve body having a receiving cavity, the first inlet, the first outlet, the second inlet and the second outlet are formed on the first valve body, and the first valve core is rotatably arranged in the receiving cavity for controlling the first inlet to be in communication with the first outlet and controlling the second inlet to be in communication with the second outlet.

[0014] When the first inlet is in communication with the first outlet, the second inlet is in communication with or disconnected from the second outlet, and when the first inlet is disconnected from the first outlet, the second inlet is disconnected from the second outlet.

[0015] In some embodiments, the second valve includes a second valve core and a second valve body having a receiving space, the third inlet and the third outlet are formed on the second valve body, and the second valve core is rotatably arranged in the receiving space for controlling the third inlet to be in communication with the third outlet.

[0016] In some embodiments, the first valve body is provided with a first vent structure and a second vent structure in communication with the outside environment, and the first valve core is rotated for controlling the first vent structure to be in communication with the first outlet and controlling the second vent structure to be in communication with the second outlet.

[0017] In some embodiments, the first valve core is provided with a first inner tube for the first vent structure and the first inlet to be in communication with the first outlet respectively, and a second inner tube for the second inlet and the second vent structure to be in communication with the second outlet respectively.

[0018] The second valve core is provided with a third inner tube for the third outlet and the third outlet to be in communication.

[0019] In some embodiments, the first valve body and the second valve body each have oppositely arranged first and second ends, the first outlet is arranged at the second end of the first valve body, and one end of the first valve core extends from the first end, the second inlet and the first inlet are arranged in sequence on the lower end surface of the first valve body in the direction close to the first outlet, and the second outlet is arranged on the side wall of the first valve body.

[0020] and / or

[0021] The third outlet is arranged at the second end of the second valve body, one end of the second valve core extends from the first end, and the third inlet is arranged on the lower end surface of the second valve body.

[0022] In some embodiments, a first seal and a second seal are arranged at the connection between the first valve core and the first valve body, the first seal is located between the second inner tube and the first inner tube, and the second seal is located between the second inner tube and the first end.

[0023] and / or

[0024] A third seal is arranged between the second valve core and the second valve body, and the third seal is located between the third inner tube and the first end.

[0025] In some embodiments, the connection mechanism includes a connecting piece and a clamping piece, the connecting piece includes a connecting portion and two parallelly arranged support arms, the connecting portion is arranged at one end of the support arms, one end of the clamping piece is connected to the other end of the support arms, and the other end of the clamping piece extends out of the connecting piece.

[0026] The first valve and the second valve are arranged on both sides of the connecting piece.

[0027] A tissue biopsy device including the valve assembly described above and a catheter assembly, the valve assembly of the tissue biopsy device is provided with a first catheter, a second catheter and a third catheter, one end of the first catheter is in communication with the first outlet, one end of the second catheter is in communication with the second outlet, and the third catheter is in communication with the third outlet and the second catheter.

[0028] The catheter assembly includes an inner catheter and a lower housing, the lower housing is in airtight connection with the lower end surface of the inner catheter to form an air guide channel between the inner catheter and the lower housing, the inner catheter is provided with a sampling groove and an air permeable hole in communication with the air guide channel, the other end of the first catheter is in communication with the inner catheter, and the other end of the second catheter is in communication with the air guide channel.

[0029] The utility model provides a valve assembly and biopsy device, has the following beneficial effects:

[0030] 1. The utility model provides a valve assembly and biopsy device, it is through being provided with first valve and second valve at the both sides of connecting mechanism, realizes control valve assembly's first export and second export place to produce negative pressure suction force through first valve, and then produces negative pressure suction force at the pipe component of biopsy device, realizes the third export of valve assembly to discharge liquid through second valve, and then provides liquid at the pipe component of biopsy tissue, and then realizes the accurate control of control negative pressure suction force and liquid discharge, simple structure, convenient operation, high working efficiency.

[0031] 2. The utility model provides a valve assembly and biopsy device, through first pipe one end with first export intercommunication, second pipe one end with second export intercommunication, third pipe one end with third export intercommunication, third pipe other end with second pipe intercommunication, can realize third pipe to pipe component provides liquid and second pipe to pipe component provides negative pressure simultaneously, liquid realizes focus organization cleaning simultaneously, can also recycle liquid through second pipe and first inlet. BRIEF DESCRIPTION OF DRAWINGS

[0032] Below will be in the clear and easy to understand way, combined with the preferred embodiment of the drawings, the above-mentioned characteristics, technical features, advantages and implementation mode of the present scheme are further explained.

[0033] Figure 1 It is the structure schematic diagram of the utility model provides a valve assembly;

[0034] Figure 2 It is the sectional view of one embodiment of the first valve provided by the utility model;

[0035] Figure 3 It is the structure schematic diagram of one embodiment of the first valve core provided by the utility model;

[0036] Figure 4 It is the sectional view of another embodiment of the first valve provided by the utility model;

[0037] Figure 5 It is the structure schematic diagram of another embodiment of the first valve core provided by the utility model;

[0038] Figure 6 It is the sectional view of the second valve provided by the utility model;

[0039] Figure 7 It is the sectional view of still another embodiment of the first valve provided by the utility model;

[0040] Figure 8is another embodiment of the first valve core provided by the utility model structure schematic diagram of the first valve core of the utility model provides.

[0041] Figure 9 is the structure schematic diagram of the second inner tube of the first valve core provided by the utility model.

[0042] Explanation of reference numerals:

[0043] Connecting mechanism 1, connecting piece 11, connecting part 111, support arm 112, clamping piece 12, first valve 2, first conduit 21, first valve body 22, first inlet 221, first outlet 222, second inlet 223, second outlet 224, first vent structure 225, second vent structure 226, first valve core 23, first inner tube 231, second inner tube 232, first sealing element 233, second sealing element 234, second conduit 24, second valve 3, third conduit 31, second valve body 32, third inlet 321, third outlet 322, second valve core 33, third inner tube 331, third sealing element 332. Specific implementation

[0044] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, specific implementation manners of the utility model will be described below with reference to the drawings. Obviously, the drawings in the following description only some embodiments of the utility model, for those skilled in the art, without creating labor, other drawings can also be obtained according to these drawings, and other implementation manners can be obtained.

[0045] In order to make the drawing simple, only the part related to the utility model is shown in each drawing, which does not represent the actual structure of the product. In addition, in order to make the drawing simple and easy to understand, the same structure or function in some drawings is only schematically shown, or only one is marked. In this paper, "one" not only means "only one", but also means "more than one".

[0046] In this paper, it is necessary to point out that, unless otherwise specified and limited, the terms "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or indirectly connected through an intermediate medium, it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the invention can be understood according to the specific circumstances.

[0047] In addition, in the description of the present application, the terms "first", "second" and the like are only used for differentiation and description, and cannot be understood as indicating or implying relative importance.

[0048] In one embodiment, a valve assembly is described, which realizes accurate control of negative pressure and liquid at the catheter assembly by setting a first valve 2 and a second valve 3, with the characteristics of simple structure, easy operation, etc.

[0049] Specifically, referring to the drawings Figures 1 to 6 A valve assembly includes a connecting mechanism 1, a negative pressure source, a liquid source, a first valve 2 and a second valve 3, wherein the first valve 2 is provided with a first inlet 221, a first outlet 222, a second inlet 223 and a second outlet 224, and the second valve 3 is provided with a third inlet 321 and a third outlet 322.

[0050] In addition, the negative pressure source is in communication with the first inlet 221 and the second inlet 223, and the first outlet 222 and the second outlet 224 are adapted to be in communication with the catheter assembly of the tissue biopsy device, the liquid source is in communication with the third inlet 321, and the third outlet 322 is adapted to be in communication with the catheter assembly of the tissue biopsy device. Correspondingly, the first valve 2 is configured to selectively provide vacuum for the catheter assembly of the tissue biopsy device through the first outlet 222 or the second outlet 224, i.e. to control the communication or disconnection between the first inlet 221 and the first outlet 222, and to control the communication or disconnection between the second inlet 223 and the second outlet 224, so that the negative pressure source can provide vacuum for the catheter assembly through the first inlet 221 and the first outlet 222, and the negative pressure source can also provide vacuum for the catheter assembly through the second inlet 223 and the second outlet 224. The second valve 3 is configured to selectively provide liquid for the catheter assembly through the third outlet 322, i.e. the second valve 3 can control the communication or disconnection between the third inlet 321 and the third outlet 322, i.e. the liquid source can provide liquid for the negative pressure catheter through the third inlet 321 and the third outlet 322. The first valve 2 and the second valve 3 are arranged on both sides of the connecting mechanism 1.

[0051] It can be understood that when the tissue biopsy device is working, the opening or closing of the negative pressure and the injection of the liquid need to be controlled according to the progress of the tissue biopsy device inserted into the lesion tissue of the patient. In the prior art, this purpose is achieved by setting multiple pipelines and valves, resulting in a complex structure and difficult use training. In the present embodiment, the first valve 2 can freely switch the communication state of the first inlet 221 and the first outlet 222, and can also freely switch the communication state of the second inlet 223 and the second outlet 224. The second valve 3 can freely switch the communication state of the third inlet 321 and the third outlet 322. In this way, the negative pressure and the communication state of the liquid of the catheter assembly can be accurately adjusted, the number of pipelines and valves is effectively reduced, the structure is simple, and the operation is convenient.

[0052] In one embodiment, referring to the drawings Figure 1The embodiment further illustrates the valve assembly, wherein the valve assembly is further provided with a first conduit 21, a second conduit 24 and a third conduit 31, one end of the first conduit 21 is communicated with the first outlet 222, one end of the second conduit 24 is communicated with the second outlet 224, one end of the third conduit 31 is communicated with the third outlet 322, and the other end of the third conduit 31 is communicated with the second conduit 24.

[0053] Further, referring to the drawings Figures 2 to 6 The embodiment further illustrates the first valve 2. The first valve 2 comprises a first valve core 23 and a first valve body 22, the first valve core 23 is arranged in a receiving cavity in the first valve body 22 and can rotate relative to the first valve body 22, in addition, the first inlet 221, the first outlet 222, the second inlet 223 and the second outlet 224 are all arranged on the first valve body 22, the first valve core 23 rotates relative to the first valve body 22 to a specific node angle to control the first inlet 221 and the first outlet 222 to be communicated or disconnected, and to control the second inlet 223 and the second outlet 224 to be communicated or disconnected.

[0054] It should be noted that the first valve core 23 rotates in the first valve body 22, when the first inlet 221 and the first outlet 222 are communicated, at this time, the second inlet 223 and the second outlet 224 are communicated or disconnected, when the first inlet 221 and the first outlet 222 are disconnected, the second inlet 223 and the second outlet 224 are disconnected.

[0055] Specifically, when the first valve core 23 rotates to the first inlet 221 and the first outlet 222, the negative pressure of the negative pressure source can be transmitted to the conduit assembly through the first inlet 221, the first outlet 222 and the first conduit 21, at this time, the second inlet 223 and the second outlet 224 are communicated or disconnected, when they are communicated, the negative pressure of the negative pressure source can also be transmitted to the conduit assembly through the second inlet 223, the second outlet 224 and the second conduit 24, when they are disconnected, the negative pressure of the negative pressure source cannot be transmitted to the conduit assembly through the second inlet 223, the second outlet 224 and the second conduit 24. In addition, when the first inlet 221 and the first outlet 222 are disconnected, the second inlet 223 and the second outlet 224 are also in a disconnected state, so that the negative pressure of the negative pressure cannot be transmitted to the conduit assembly through the first outlet 222 and the second outlet 224.

[0056] In addition, the second valve 3 comprises a second valve body 32 and a second valve core 33, the third inlet 321 and the third outlet 322 are both arranged on the second valve body 32, and the second valve core 33 is arranged in a containing space of the second valve body 32 and can rotate relative to the second valve body 32. The third inlet 321 and the third outlet 322 are connected or disconnected by rotating the second valve core 33 relative to the second valve body 32.

[0057] Further, referring to the drawings of the specification Figure 1 and Figure 2 , the first valve body 22 is further described in this embodiment, wherein the first valve body 22 is further provided with a first vent structure 225 and a second vent structure 226, and the first vent structure 225 and the second vent structure 226 are both connected with the external environment. The first valve core 23 rotates relative to the first valve body 22, and the first valve core 23 is rotated to a specific node angle to control the first vent structure 225 to be connected with the first outlet 222, so that the first outlet 222, the first vent structure 225 and the external environment are connected with each other, and in the state that the first vent structure 225 is connected with the first outlet 222, the first inlet 221 and the first outlet 222 are not connected. In addition, the first valve core 23 rotates relative to the first valve body 22, and the first valve core 23 is rotated to a specific node angle to control the second vent structure 226 to be connected with the second outlet 224, so that the second outlet 224, the second vent structure 226 and the external environment are connected with each other, and when the second vent structure 226 is connected with the second outlet 224, the second inlet 223 and the second outlet 224 are not connected.

[0058] The first vent structure 225 and the second vent structure 226 are arranged, so that the medical staff can rotate the first valve core 23 to timely discharge the negative pressure in the first conduit 21 and the second conduit 24, and reduce the possibility of blockage in the first conduit 21 and the second conduit 24 caused by air resistance.

[0059] In one embodiment, referring to the drawings of the specification Figure 1 , the first valve body 22 and the second valve body 32 both have oppositely arranged first ends and second ends, wherein the first outlet 222 is arranged at the second end of the first valve body 22, the first inlet 221 and the second inlet 223 are both arranged on the lower end face of the first valve body 22 and are arranged in sequence in the direction away from the first outlet 222 of the first valve body 22. Correspondingly, the first valve core 23 is arranged in the containing cavity of the first valve body 22, one end of the first valve core 23 extends from the first end, and the second outlet 224 is arranged on the side wall of the first valve body 22. Similarly, the third outlet 322 is arranged at the second end of the second valve body 32, one end of the second valve core 33 extends from the first end of the second valve body 32, and the third inlet 321 is arranged on the lower end face of the second valve body 32.

[0060] It can be understood that the one end of the first valve core 23 extends from the first end, and the one end of the second valve core 33 also extends from the first end. The rotation of the first valve core 23 and the second valve core 33 can be driven by the driving member, so as to adjust the negative pressure and the connection or disconnection of the liquid.

[0061] Further, the first valve core 23 is provided with a first inner pipe 231 for connecting the first vent structure 225 and the first inlet 221 with the first outlet 222, respectively. The first valve core 23 is also provided with a second inner pipe 232 for connecting the second inlet 223 and the second vent structure 226 with the second outlet 224, respectively. Correspondingly, the second valve core 33 is provided with a third inner pipe 331 for connecting the third outlet 322 with the third outlet 322.

[0062] Referring to the drawings attached to the specification Figure 9 , the second inner pipe 232 is a V-shaped bent pipe, which is arranged in the first valve core 23. The two ends of the second inner pipe 232 are arranged on the side wall of the first valve core 23, respectively. By rotating the first valve core 23, the corresponding relationship between the two ends of the second inner pipe 232 and the second inlet and the second vent structure is adjusted. Correspondingly, referring to the drawings attached to the specification Figure 2 , Figure 5 and Figure 8 , the specific structure of the second inner pipe is provided, respectively. The structure of the second inner pipe is arranged according to the position of the two ends of the first inner pipe on the first valve core 23, which is not limited here, so as to achieve the effect of adjusting the connection of the first outlet, the first inlet and the first vent structure by rotating the first valve core 23.

[0063] Further, the first sealing member 233 and the second sealing member 234 are arranged at the connection between the first valve core 23 and the first valve body 22. The first sealing member 233 is arranged between the second inner pipe 232 and the first inner pipe 231, so that the negative pressure transmitted to the first valve body 22 through the first inlet 221 can be fully transmitted to the catheter assembly through the first outlet 222. In addition, the second sealing member 234 is located between the second inner pipe 232 and the first end, so that the negative pressure transmitted to the first valve body 22 through the second inlet 223 can be fully transmitted to the catheter assembly through the second outlet 224.

[0064] Correspondingly, the third sealing member 332 is arranged between the second valve core 33 and the second valve body 32. The third sealing member 332 is located between the third inner pipe 331 and the first end, so that the liquid provided by the liquid source can fully flow into the third catheter through the third outlet 322.

[0065] Generally, the first seal 233, the second seal 234 and the third seal 332 can be provided as elastic sealing rings, and mounting grooves are provided on the first valve core 23 and the second valve core 33 to allow the sealing rings to be sleeved on the outer sides of the first valve core 23 and the second valve core 33.

[0066] In one embodiment, referring to the drawings Figure 1 The connecting mechanism 1 is further described in the embodiment. The connecting mechanism includes a connecting piece 11 and a clamping piece 12. The connecting piece 11 includes a connecting portion 111 and two parallel support arms 112. The connecting portion 111 is arranged at one end of the support arms 112. One end of the clamping piece 12 is connected to the other end of the support arms 112, and the other end of the clamping piece 12 extends out of the connecting piece. Correspondingly, the first valve 2 and the second valve 3 are arranged on the two sides of the connecting piece 11.

[0067] In one embodiment, the embodiment provides a tissue biopsy device including the valve assembly described in any of the above embodiments and further including a catheter assembly. The valve assembly of the tissue biopsy device is provided with a first catheter 21, a second catheter 24 and a third catheter 31. One end of the first catheter 21 is connected to the first outlet 222. One end of the second catheter 24 is connected to the second outlet 224. One end of the third catheter 31 is connected to the third outlet 322. The other end of the third catheter 31 is connected to the second catheter 24.

[0068] Further, the catheter assembly includes an inner catheter and a lower housing. The lower housing is arranged on the lower end surface of the inner catheter and is in airtight connection with the lower end surface of the inner catheter to form an air guide channel between the inner catheter and the lower housing. In addition, a sampling groove is arranged on the inner catheter, and an air permeable hole is arranged on the lower end surface of the inner catheter and is in communication with the air guide channel. Correspondingly, the other end of the first catheter 21 is connected to the inner catheter, and the other end of the second catheter is connected to the air guide channel.

[0069] Specifically, in one embodiment, referring to the drawings Figures 1 to 3 The first catheter 21 and the second catheter 24 of the valve assembly are in communication with the catheter assembly of the tissue biopsy device.

[0070] In the preparation stage, the second valve core 33 is rotated to disconnect the third inlet 321 and the third outlet 322, so that the liquid source does not inject liquid into the air guide channel, and then the first valve core 23 is rotated to rotate the first valve body 22 by a certain angle, so that the first inlet 221 and the first outlet 222 are connected, the first vent structure 225 is disconnected from the first outlet 222, the second inlet 223 is connected to the second outlet 224 at this time, and the second vent structure 226 is disconnected from the second outlet 224, so that the first conduit 21 and the second conduit 24 both have negative pressure. Then the conduit assembly of the biopsy device in the preparation stage is inserted into the patient's body, so that the negative pressure source provides negative pressure through the inner conduit, the air guide channel and the sampling groove to adsorb the lesion tissue in the sampling groove.

[0071] When the conduit assembly moves to a certain distance, the second valve core 33 remains unchanged, the first valve core 23 is rotated by a certain angle, so that the first inlet 221 and the first outlet 222 are connected, the first vent structure 225 is disconnected from the first outlet 222, the second vent structure 226 is connected to the second outlet 224 at this time, and the second inlet 223 is disconnected from the second outlet, so that the negative pressure source only provides negative pressure through the first outlet 222 and the inner conduit, and the air guide channel is vented through the second vent structure 226.

[0072] Then, the second valve core 33 is rotated by a certain angle, so that the third inlet 321 and the third outlet 322 are connected, and the liquid moves through the third outlet 322, the third conduit 31, the second conduit 24, the air guide channel and the inner conduit to clean the lesion tissue in the sampling groove.

[0073] Then, when the conduit assembly completely enters the lesion tissue, the second valve core 33 is rotated to close the second valve 3, and the first valve core 23 remains unchanged, so that the negative pressure source provides negative pressure to the inner conduit through the first outlet 222 to suck the cut lesion tissue into the inner conduit. Then control the second valve 3 to open, and the first valve core 23 remains unchanged, so that the liquid cleans the lesion tissue. In the tool withdrawal stage, the lesion tissue is already in the inner conduit, the second valve 3 is closed, and the first valve core 23 is rotated, so that the first inlet 221 and the first outlet 222 are disconnected, the first vent structure 225 is connected to the first outlet 222, and then the inner conduit is vented through the first vent structure 225, the second vent structure 226 is disconnected from the second outlet 224 at this time, and the second inlet 223 is disconnected from the second outlet.

[0074] In one embodiment, referring to the drawings Figures 4 to 6In the preparation stage, the second valve 3 is closed, and then the first valve body 22 is rotated so that the first inlet 221 and the first outlet 222 are connected, the first vent structure 225 is disconnected from the first outlet 222, and the negative pressure of the negative pressure source is transmitted to the sampling groove through the first outlet 222 and the inner conduit. At this time, the second inlet 223 and the second outlet 224 are connected, and the second vent structure 226 is disconnected from the second outlet 224. The negative pressure of the negative pressure source can also be transmitted to the sampling groove through the second outlet 224 and the air guide channel.

[0075] Then the catheter assembly in the preparation stage is inserted into the patient's body, so that the negative pressure source absorbs the lesion tissue in the sampling groove through the inner conduit, the air guide channel and the sampling groove. After the catheter assembly moves a certain distance, the second valve 3 remains unchanged, and the first valve body 22 is continuously rotated by a certain angle so that the first inlet 221 and the first outlet 222 are connected, and the first vent structure 225 is disconnected from the first outlet 222, so that the negative pressure source only provides negative pressure through the inner conduit. At this time, the second vent structure 226 is connected to the second outlet 224, so that the air guide channel is vented through the second vent structure 226, and the second inlet 223 is disconnected from the second outlet 224. Then the catheter assembly continues to move, the second valve 3 is opened, the first valve body 22 is continuously rotated by a certain angle so that the first inlet 221 and the first outlet 222 are connected, and the first vent structure 225 is disconnected from the first outlet 222. At this time, the second inlet 223 is disconnected from the second outlet 224, and the second vent structure 226 is disconnected from the second outlet 224, so that the liquid moves in the third outlet 322, the third conduit 31, the second conduit 24, the air guide channel and the inner conduit to clean the lesion tissue in the sampling groove.

[0076] When the catheter assembly is fully inserted into the patient, the second valve 3 is closed, the first valve body 22 is further rotated by a certain angle so that the first inlet 221 and the first outlet 222 are communicated, the first vent structure 225 is disconnected from the first outlet 222, and the second vent structure 226 is communicated with the second outlet 224 while the second inlet 223 is disconnected from the second outlet 224. Then the second valve 3 is opened so that the liquid can clean the lesion tissue in the inner catheter, the first valve body 22 is further rotated by a certain angle so that the first inlet 221 and the first outlet 222 are communicated, the first vent structure 225 is disconnected from the first outlet 222, and the second inlet 223 is disconnected from the second outlet 224 while the second vent structure 226 is disconnected from the second outlet 224. Then the second valve 3 is closed, the first valve body 22 is further rotated by a certain angle so that the first inlet 221 and the first outlet 222 are communicated, the first vent structure 225 is disconnected from the first outlet 222, and the second vent structure 226 is communicated with the second outlet 224 while the second inlet 223 is disconnected from the second outlet 224. The second valve 3 remains closed, the first valve body 22 is further rotated by a certain angle so that the first inlet 221 and the first outlet 222 are disconnected, the first vent structure 225 is communicated with the first outlet 222, and the second vent structure 226 is disconnected from the second outlet 224 while the second inlet 223 is disconnected from the second outlet 224.

[0077] Then in the tool withdrawal stage, the first valve body 22 is further rotated by a certain angle so that the first inlet 221 and the first outlet 222 are disconnected, the first vent structure 225 is disconnected from the first outlet 222, the second inlet 223 is disconnected from the second outlet 224, and the second vent structure 226 is disconnected from the second outlet 224, and the second valve 3 remains closed.

[0078] In one embodiment, referring to the drawings attached hereto Figure 7 and Figure 8In the tissue biopsy device provided by the embodiment, in the preparation stage, the second valve core 33 is rotated to disconnect the third inlet 321 and the third outlet 322, so that the liquid source does not inject liquid into the air guide channel, then the first valve core 23 is rotated to rotate the first valve body 22 by a certain angle, so that the first inlet 221 and the first outlet 222 are connected, the first vent structure 225 is disconnected from the first outlet 222, the second inlet 223 is connected to the second outlet 224 at this time, the second vent structure 226 is disconnected from the second outlet 224, so that the first conduit 21 and the second conduit 24 both have negative pressure. Then the conduit assembly is inserted into the patient's body, so that the negative pressure is passed through the inner conduit and the air guide channel to adsorb the lesion tissue in the sampling groove. The second valve core 33 remains unchanged, the conduit assembly continues to move forward, the first valve core 23 is rotated by a certain angle, so that the first inlet 221 and the first outlet 222 are connected, the first vent structure 225 is disconnected from the first outlet 222, the second vent structure 226 is connected to the second outlet 224, the second inlet 223 is disconnected from the second outlet, and the air in the air guide channel is discharged through the second vent structure 226, so that the negative pressure source only provides negative pressure through the first outlet 222 and the inner conduit. Then, the second valve core 33 is rotated by a certain angle, so that the third inlet 321 and the third outlet 322 are connected, and the liquid is moved through the third outlet 322, the third conduit 31, the second conduit 24, the air guide channel and the inner conduit to clean the lesion tissue in the sampling groove. After the tool is retracted, the second valve core 33 is rotated to stop the water supply, and the first valve core 23 remains unchanged. Then, the second valve core 33 is rotated to supply water through the third outlet.

[0079] In the retraction stage, the second valve 3 remains closed, the first valve body 22 continues to rotate by a certain angle, so that the first inlet 221 and the first outlet 222 are disconnected, the first vent structure 225 is disconnected from the first outlet 222, the second inlet 223 is disconnected from the second outlet 224 at this time, and the second vent structure 226 is disconnected from the second outlet 224.

[0080] It should be noted that the above embodiments can be freely combined as needed. The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which should be considered as the protection scope of the present application.

Claims

1. A valve assembly comprising: The device comprises a connecting mechanism, a first valve, a second valve, a negative pressure source and a liquid source, the first valve and the second valve are arranged on both sides of the connecting mechanism, the first valve is provided with a first inlet, a first outlet, a second inlet and a second outlet, the second valve is provided with a third inlet and a third outlet; The negative pressure source is in communication with the first inlet and the second inlet, the liquid source is in communication with the third inlet, the first outlet, the second outlet and the third outlet are adapted to communicate with the catheter assembly of the tissue biopsy device; The first valve is arranged to selectively provide vacuum for the catheter assembly through the first outlet or the second outlet, and the second valve is arranged to selectively provide liquid for the catheter assembly through the third outlet.

2. A valve assembly according to claim 1, wherein It also comprises a first catheter, a second catheter and a third catheter, one end of the first catheter is in communication with the first outlet, the other end of the first catheter is adapted to communicate with the catheter assembly; One end of the second catheter is in communication with the second outlet, the other end of the second catheter is adapted to communicate with the catheter assembly; One end of the third catheter is in communication with the third outlet, the other end of the third catheter is in communication with the second catheter.

3. A valve assembly according to claim 2, wherein The first valve comprises a first valve core and a first valve body with a containing cavity, the first inlet, the first outlet, the second inlet and the second outlet are all arranged on the first valve body, the first valve core is rotatably arranged in the containing cavity, for controlling the first inlet to communicate with the first outlet, and controlling the second inlet to communicate with the second outlet; When the first inlet communicates with the first outlet, the second inlet communicates with or disconnects from the second outlet, when the first inlet disconnects from the first outlet, the second inlet disconnects from the second outlet.

4. A valve assembly according to claim 3, wherein The second valve comprises a second valve core and a second valve body with a containing space, the third inlet and the third outlet are all arranged on the second valve body, the second valve core is rotatably arranged in the containing space, for controlling the third inlet to communicate with the third outlet.

5. A valve assembly according to claim 4, wherein The first valve body is provided with a first vent structure and a second vent structure in communication with the external environment, the first valve core rotates to control the first vent structure to communicate with the first outlet, and control the second vent structure to communicate with the second outlet.

6. A valve assembly according to claim 5, wherein The first valve core is provided with a first inner tube for the first vent structure and the first inlet to communicate with the first outlet respectively, and a second inner tube for the second inlet and the second vent structure to communicate with the second outlet respectively; The second valve core is provided with a third inner tube for the third outlet to communicate with the third outlet.

7. A valve assembly according to claim 6, wherein The first valve body and the second valve body both have oppositely arranged first end and second end, the first outlet is arranged at the second end of the first valve body, and one end of the first valve core extends from the first end, the second inlet and the first inlet are arranged in sequence on the lower end surface of the first valve body in the direction close to the first outlet, and the second outlet is arranged on the side wall of the first valve body; and / or The third inlet is arranged on the lower end surface of the second valve body.

8. A valve assembly according to claim 7, wherein The first sealing member is arranged between the second inner tube and the first inner tube, and the second sealing member is arranged between the second inner tube and the first end. and / or The third sealing member is arranged between the second valve core and the second valve body.

9. A valve assembly according to any one of claims 1 to 8, wherein, The connecting mechanism comprises a connecting member and a clamping member, the connecting member comprises a connecting portion and two parallel arranged supporting arms, the connecting portion is arranged on one end of the supporting arms, one end of the clamping member is connected with the other end of the supporting arms, and the other end of the clamping member extends out of the connecting member. The first valve and the second valve are arranged on both sides of the connecting member.

10. A tissue biopsy device characterized by, The valve assembly comprises a catheter assembly, the valve assembly of the tissue biopsy device is provided with a first catheter, a second catheter and a third catheter, one end of the first catheter is communicated with the first outlet, one end of the second catheter is communicated with the second outlet, and the third catheter is communicated with the third outlet and the second catheter. The catheter assembly comprises an inner catheter and a lower housing, the lower housing is hermetically connected with the lower end surface of the inner catheter to form an air guiding channel between the inner catheter and the lower housing, the inner catheter is provided with a sampling groove and an air permeable hole communicated with the air guiding channel, the other end of the first catheter is communicated with the inner catheter, and the other end of the second catheter is communicated with the air guiding channel.

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