Self-venting biopsy rotary cutting apparatus

Abstract

A self-venting biopsy rotary cutting apparatus, comprising a tip (1000), a cutting tube (2000), a vent tube (3000), a base structure (4000), a pushing structure (5000), a first combined cavity, a second combined cavity, and an elastic sealing member (6000). The tip (1000) is disposed at the front end of the biopsy rotary cutting apparatus, and a tail boss of the tip (1000) is coaxially assembled with the vent tube (3000). The cutting tube (2000) is sleeved in the vent tube (3000) and coaxially fitted with the vent tube (3000), and performs an axial cutting motion in the vent tube (3000). The vent tube (3000) is assembled inside the base structure (4000). The first combined cavity is disposed in front of the elastic sealing member (6000), the second combined cavity is disposed behind the elastic sealing member (6000), and the elastic sealing member (6000) is used to control sealing and opening of the first combined cavity. The self-venting biopsy rotary cutting apparatus has the functions of pressurizing and venting tissue during a puncture process, solving the problem of negative pressure adhesion formed by tissue wrapping on a cutter tube, and greatly decreasing resistance for a doctor during the puncture process.

Description

A self-exhausting biopsy rotary cutting device Technical Field

[0001] The present invention relates to the technical field of biopsy rotary cutting, and in particular to a self-exhausting biopsy rotary cutting device. Background Art

[0002] Biopsy excision devices are usually used to remove breast tissue that is diagnosed as abnormal by imaging under ultrasound guidance. This type of breast surgery requires a small incision in the breast skin, and then the blade of the excision device is punctured into the lesion. The negative pressure provided by the main unit of the biopsy excision device is used to suck the tissue into the blade groove, and then the power provided by the main unit is used to drive the cutting tube of the excision device to excise the tissue. The excised tissue is transported to the sample collector at the tail of the excision device through the negative pressure provided by the main unit of the biopsy excision device, thus completing the operation.

[0003] Before performing the abnormal breast tissue removal surgery, the blade tube needs to be punctured into the lesion site. The puncture process is usually the longest step. The main reason is that breast tissue is very elastic, and it is easy for the tissue to wrap around the blade tube during the puncture process. Secondly, the diameter of the blade tube of the live biopsy device is much larger than that of a conventional biopsy needle, and the blade tube of the live biopsy device is mostly made of stainless steel with a smooth surface. During the puncture process, the tissue can easily completely wrap around the blade tube. Once wrapped to a certain extent, negative pressure will be formed between the tissue and the surface of the blade tube, causing the tissue to adhere to the blade tube, resulting in obstructed puncture.

[0004] If the doctor encounters resistance during the puncture process, in order to continue to puncture forward, the doctor will inevitably increase the puncture force. When the knife tube breaks free from the negative pressure of the tissue, it will suddenly leap forward. If the tip of the knife is near the patient's vital organs at this time, it will cause irreversible damage to the patient, thereby causing a medical accident.

[0005] Summary of the Invention

[0006] In response to the above problems, the purpose of the present invention is to provide a self-exhausting biopsy excision device that has the function of pressurizing and exhausting the tissue during the puncture process, solving the problem of negative pressure adhesion caused by tissue wrapping on the blade, greatly reducing the resistance of the doctor during the puncture process, providing a safe and reliable environment for the doctor during the puncture process, saving time for breast excision surgery, and protecting the health and interests of patients. At the same time, the device of the present invention uses air from the natural environment to achieve the pressurized exhaust effect on the tissue, without introducing energy of other properties, and has certain safety and economy. It can save costs for enterprises, thereby reducing the equipment costs of patients and seeking benefits for patients.

[0007] The above-mentioned object of the present invention is achieved through the following technical solutions:

[0008] A self-exhausting biopsy rotary cutting device comprises: a blade tip, a cutting tube, an exhaust pipe, a base structure, a pushing structure, a first combined cavity, a second combined cavity, and an elastic sealing member;

[0009] The blade tip is arranged at the front end of the biopsy peeling device, and the exhaust pipe is coaxially mounted on the tail boss of the blade tip;

[0010] The cutting tube is sleeved in the exhaust pipe and is coaxially matched with the exhaust pipe, and performs axial cutting movement in the exhaust pipe. The exhaust pipe is assembled inside the base structure;

[0011] The first combined cavity is arranged in front of the elastic sealing member, and the second combined cavity is arranged behind the elastic sealing member. The elastic sealing member is used to control the sealing and opening of the first combined cavity.

[0012] When the pushing structure is held and punctured toward the location of the diseased tissue, the first combined cavity is in a sealed state, the pushing structure moves toward the blade tip, the volume of the first combined cavity in front of the elastic sealing member decreases, and the air in the first combined cavity is compressed and pressurized, and the pressurized air is discharged outward from the exhaust pipe into the diseased tissue;

[0013] When the air is discharged from the exhaust pipe, the pressure in the first combined cavity decreases, and the external air pushes the elastic seal forward from the second combined cavity located behind the elastic seal, and the first combined cavity is transformed into an open state. The external air backfills the first combined cavity, and the air pressure in the first combined cavity increases. The air with increased pressure pushes the pushing structure in the reverse direction away from the knife tip, and at the same time pushes the elastic seal backward until the first combined cavity is in a sealed state. The air pressure in the first combined cavity is the same as the external air pressure.

[0014] Furthermore, the exhaust pipe includes a notch provided at the head portion for absorbing the diseased tissue and an exhaust portion provided at the tail portion;

[0015] The maximum displacement of the cutting tube in the backward movement is that the front end of the cutting tube is flush with the rear end surface of the notch;

[0016] An annular gap is provided between the cutting tube and the exhaust pipe, and an annular seal is provided at the rear end surface of the notch in the annular gap, and the annular seal blocks the notch from the space where the exhaust portion is located behind the notch;

[0017] The exhaust portion is evenly distributed with a number of micro holes along its entire body.

[0018] Furthermore, the base structure includes a base and a base extension cylinder, and the pushing structure includes a push cylinder cover, a push cylinder, a valve cylinder, a valve cylinder cover and a push plate;

[0019] The base is located at the tail end of the exhaust pipe, and the base extension tube is coaxially arranged at the tail end of the base;

[0020] The push cylinder is coaxially assembled on the rear outer ring of the base extension cylinder, the push cylinder cover is coaxially arranged in front of the push cylinder, the rear end surface of the push cylinder cover is fixed to the front end surface of the push cylinder, and the push cylinder is outer-mounted on the base extension cylinder and performs axial translation movement along the base extension cylinder;

[0021] The valve cylinder is arranged at the rear of the base, nested on the outside of the cutting tube, and coaxially arranged with the cutting tube. The valve cylinder cover is coaxially assembled at the rear of the valve cylinder.

[0022] The push plate is coaxially arranged behind the valve cylinder cover, and the front end surface of the push plate is fixed to the rear end surface of the valve cylinder cover.

[0023] Furthermore, the base includes a first base boss, a second base boss, a third base boss, a first base countersunk hole and a second base countersunk hole;

[0024] The first base boss is provided on the head of the base;

[0025] The second base boss and the third base boss are coaxially arranged at the tail of the base, the second base boss is located at the outer layer, and the third base boss is located at the inner layer;

[0026] The first base counterbore is formed between the second base boss and the third base boss;

[0027] The first base boss and the third base boss are connected, and the second base countersunk hole is formed at the connection between the first base boss and the third base boss;

[0028] A base recess is provided on the outer side of the tail portion of the third base boss, and the first sealing member is assembled in the base recess. The front end surface and the rear end surface of the base recess axially fix the first sealing member.

[0029] The tail of the exhaust pipe is assembled in the inner hole of the first base boss, the rear end surface of the exhaust pipe is flush with the bottom surface of the second base countersunk hole, and the connection between the exhaust pipe and the first base boss is sealed.

[0030] Furthermore, the valve cylinder is arranged behind the third base boss, nested on the outside of the cutting tube, and coaxially matched with the cutting tube;

[0031] The valve cylinder includes a first valve cylinder boss, a second valve cylinder boss, a third valve cylinder boss and a valve cylinder countersunk hole, the first valve cylinder boss is arranged at the head of the valve cylinder, the second valve cylinder boss and the third valve cylinder boss are arranged at the tail of the valve cylinder, and the second valve cylinder boss is located on the outer layer of the third valve cylinder boss;

[0032] The second valve cylinder boss and the third valve cylinder boss are coaxially arranged and form the valve cylinder counterbore;

[0033] The head of the first valve cylinder boss is nested in the outer ring of the first sealing member, and the front end surface of the first valve cylinder boss is located at a first preset distance in front of the front end surface of the base recess and a second preset distance from the bottom surface of the first base countersunk hole;

[0034] A first annular gap is defined between the third valve cylinder boss and the cutting tube, and air can flow freely in the first annular gap;

[0035] The third valve cylinder boss is uniformly distributed with a plurality of valve cylinder boss through grooves along the circumference, and air flows through the valve cylinder boss through grooves. The rear end surface of the third valve cylinder boss has a valve cylinder boss rounded corner.

[0036] The first sealing member seals the inner side of the first valve cylinder boss and the outer side of the third seat boss, a second annular gap is defined between the first valve cylinder boss and the third seat boss, and the first valve cylinder boss is capable of axial translational movement relative to the third seat boss;

[0037] A first annular cavity is formed between the first valve cylinder boss and the cutting tube.

[0038] Furthermore, the valve cylinder cover includes a cylinder cover inner hole and a cylinder cover boss;

[0039] The cutting tube passes through the inner hole of the cylinder cover, and a third annular gap is formed between the cutting tube and the inner hole of the cylinder cover, and air can flow freely in the third annular gap;

[0040] The cylinder cover boss is arranged on the front end surface of the valve cylinder cover, and the cylinder cover boss is sleeved inside the second valve cylinder boss, and the connection surface between the cylinder cover boss and the second valve cylinder boss is sealed;

[0041] The outer diameter of the valve cylinder cover is equal to the outer diameter of the second valve cylinder boss.

[0042] Furthermore, there is a gap between the front end surface of the valve cylinder cover and the rear end surface of the third valve cylinder boss, and the elastic sealing member is assembled in the gap and is coaxially arranged with the cutting tube;

[0043] The elastic seal has an inner hole, the diameter of which is smaller than the outer diameter of the cutting tube, and the inner ring of the elastic seal is sealed with the outer ring of the cutting tube;

[0044] The thickness of the elastic seal in the axial direction is smaller than the gap between the front end surface of the valve cylinder cover and the rear end surface of the third valve cylinder boss, and the elastic seal translates axially in the gap;

[0045] When the elastic seal translates forward until the front end face of the elastic seal contacts the rear end face of the third valve cylinder boss, a fourth annular gap is formed between the rear end face of the elastic seal and the front end face of the valve cylinder cover, and a fifth annular gap is formed between the outer ring of the elastic seal and the inner ring of the cylinder cover boss, and air can flow freely between the fourth annular gap and the fifth annular gap;

[0046] When the elastic seal moves backward in translation until the rear end surface of the elastic seal contacts the front end surface of the valve cylinder cover, the elastic seal is converted into a sealing state.

[0047] Furthermore, the push plate is provided with a push plate inner hole and a plurality of push plate ears;

[0048] The cutting tube passes through the inner hole of the push plate, and a sixth annular gap is provided between the inner hole of the push plate and the cutting tube. The diameter of the sixth annular gap is equal to that of the third annular gap, and the air in the third annular gap and the sixth annular gap is in communication with the outside world.

[0049] The outer ring of the push plate is evenly distributed with a plurality of push plate ears, and the front end surface of the push plate is fixed to the rear end surface of the valve cylinder cover.

[0050] Furthermore, the base extension tube is assembled at the rear of the third base boss, and the front end surface of the base extension tube is fixed to the rear end surface of the third base boss;

[0051] The tail of the base extension tube is uniformly distributed with a plurality of extension tube slots along the circumferential direction. The push plate ear piece translates in the extension tube slot and translates forward until the front end surface of the push plate ear piece contacts the front end surface of the extension tube slot.

[0052] The rear end surface of the base extension tube is provided with an extension tube countersunk hole, and a third preset distance exists between the bottom surface of the extension tube countersunk hole and the front end surface of the extension tube through groove.

[0053] Furthermore, a plurality of push-cylinder half grooves are uniformly distributed on the inner side of the head of the push-cylinder, and the push-plate lugs extend into the push-cylinder half grooves and translate in the push-cylinder half grooves;

[0054] The rear end surface of the push plate ear is fixed to the rear end surface of the half groove of the push cylinder half groove, and the push cylinder is outermostly fitted on the base extension cylinder and moves along the axial direction of the base extension cylinder.

[0055] Furthermore, a coaxial gripping tube is mounted on the rear of the base extension tube, the head of the gripping tube is provided with a first gripping boss, and the tail of the gripping tube is provided with a second gripping boss;

[0056] The front end surface of the first gripping boss is provided with a gripping annular recessed groove, and the gripping annular recessed groove and the extension tube recessed hole of the base extension tube are nested and fixed to each other;

[0057] The push cylinder is externally mounted on the first gripping boss and is axially translated along the first gripping boss, and is translated backward until the rear end surface of the push cylinder contacts the front end surface of the second gripping boss;

[0058] The sample collector of the biopsy excision device is arranged at the rear of the holding tube and is used for collecting the excised diseased tissue.

[0059] Furthermore, the push cylinder cover, the push cylinder, the valve cylinder, the valve cylinder cover and the push plate are connected to each other to form a whole and can translate together along the axial direction of the cutting tube, the maximum forward translation position is when the front end surface of the push plate ear contacts the front end surface of the extension cylinder through groove of the base extension cylinder, and the maximum backward translation position is when the rear end surface of the push cylinder contacts the front end surface of the second gripping boss;

[0060] The first combined cavity includes the second base counterbore, the first annular cavity, the valve cylinder counterbore, the annular gap, the first annular gap, and the fifth annular gap;

[0061] The second combined cavity includes the sixth annular gap and the third annular gap.

[0062] Compared with the prior art, the present invention has at least one of the following beneficial effects:

[0063] (1) By providing a self-exhausting biopsy excision device that has the function of pressurizing and exhausting the tissue during the puncture process, the problem of negative pressure adhesion formed by the tissue wrapping on the knife tube is solved, the doctor's resistance during the puncture process is greatly reduced, and a safe and reliable environment is provided for the doctor during the puncture process, saving time for breast excision surgery and protecting the health and interests of patients.

[0064] (2) The present invention uses the air in the natural environment as a medium without introducing other energy, and continuously exhausts air into the tissue during the puncture process of the rotary cutting operation, thereby solving the problem of negative pressure adhesion formed by the tissue wrapping the knife tube. It has certain economic efficiency, can save costs for biopsy rotary cutting devices, and brings benefits to patients. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] FIG1 is a schematic diagram of the overall structure of the self-exhausting biopsy rotary cutting device of the present invention;

[0066] FIG2 is a cross-sectional view of the self-venting biopsy device of FIG1 of the present invention;

[0067] FIG3 is an enlarged schematic diagram of position A of the elastic sealing member in FIG2 of the present invention when the elastic sealing member is in the initial rearward maximum position;

[0068] FIG4 is an enlarged schematic diagram of position A in FIG2 of the present invention, where the elastic sealing member is pushed forward to form a fourth annular gap;

[0069] FIG5 is an enlarged schematic diagram of the elastic sealing member in FIG2 of the present invention being pushed forward to position A in a flipped state;

[0070] FIG6 is a partial schematic diagram of the base extension tube of the present invention;

[0071] FIG7 is a partial schematic diagram of the push cylinder of the present invention;

[0072] FIG8 is a partial schematic diagram of the valve cylinder, elastic sealing member and valve cylinder cover of the present invention;

[0073] FIG9 is a partial schematic diagram of the push plate of the present invention.

[0074] Reference numerals

[0075] 1000: Knife tip; 2000: Cutting tube; 3000: Exhaust pipe; 4000: Base structure; 5000: Pushing structure; 6000: Elastic sealing element; 7000: First sealing element; 8000: Grip tube;

[0076] 2100: annular gap; 2200: annular seal;

[0077] 3100: notch; 3200: micro hole;

[0078] 4100: Base; 4200: Base extension tube;

[0079] 4110: first base boss; 4120: second base boss; 4130: third base boss; 4140: first base countersunk hole; 4150: second base countersunk hole;

[0080] 4131: Base sink;

[0081] 4210: Extension tube through groove; 4220: Extension tube countersunk hole;

[0082] 4211: Front end surface of the extension tube slot;

[0083] 5100: Push cylinder cover; 5200: Push cylinder; 5300: Valve cylinder; 5400: Valve cylinder cover; 5500: Push plate;

[0084] 5210: push cylinder half groove;

[0085] 5211: half-groove rear end face;

[0086] 5310: first valve cylinder boss; 5320: second valve cylinder boss; 5330: third valve cylinder boss; 5340: valve cylinder counterbore;

[0087] 5311: second annular gap; 5112: first annular cavity;

[0088] 5331: first annular gap; 5332: valve cylinder boss groove; 5333: valve cylinder boss fillet;

[0089] 5410: inner hole of cylinder cover; 5420: cylinder cover boss; 5430: fourth annular gap;

[0090] 5411: third annular gap;

[0091] 5421: fifth annular gap;

[0092] 5510: Push plate inner hole; 5520: Push plate ear;

[0093] 5511: sixth annular gap;

[0094] 6100: inner hole of seal;

[0095] 8100: first gripping boss; 8200: second gripping boss;

[0096] 8110: Holding the annular sink. DETAILED DESCRIPTION

[0097] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0098] Those skilled in the art will appreciate that, unless otherwise stated, the singular forms "a," "an," "said," and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present invention refers to the presence of the stated features, integers, steps, operations, elements, and / or components, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0099] First embodiment

[0100] As shown in Figures 1-9, this embodiment provides a self-exhausting biopsy peeling device, including: a blade tip 1000, a cutting tube 2000, an exhaust pipe 3000, a base structure 4000, a pushing structure 5000, a first combined cavity, a second combined cavity, and an elastic seal 6000.

[0101] The present invention is illustrated in the following manner: The illustrations are from left to right, representing the front and back (head and tail). The present invention is illustrated in the following manner: The fixing method is not limited to gluing, fusion, tight fitting, etc. The specific structure of the present invention is described in detail below.

[0102] The blade tip 1000 is arranged at the front end of the biopsy peeling device, and the exhaust pipe 3000 is coaxially assembled on the tail boss of the blade tip 1000. The connection between the blade tip 1000 and the exhaust pipe 3000 is sealed. The cutting tube 2000 is sleeved in the exhaust pipe 3000 and is coaxially matched with the exhaust pipe 3000, and performs axial cutting movement in the exhaust pipe 3000. The exhaust pipe 3000 is assembled inside the base structure 4000. The first combined cavity is arranged in front of the elastic seal 6000, and the second combined cavity is arranged behind the elastic seal 6000. The elastic seal 6000 is used to control the sealing and opening of the first combined cavity.

[0103] When the pushing structure 5000 is held and punctured toward the location of the diseased tissue, the first combined cavity is in a sealed state, the pushing structure 5000 moves toward the direction approaching the knife tip 1000, the volume of the first combined cavity located in front of the elastic seal 6000 decreases, the air in the first combined cavity is compressed and pressurized, and the pressurized air is discharged outward from the exhaust pipe 3000 into the diseased tissue; when the air is discharged from the exhaust pipe 3000, the pressure in the first combined cavity decreases, and the external air pushes the elastic seal 6000 forward from the second combined cavity located behind the elastic seal 6000, and the first combined cavity is transformed into an open state. The external air backfills the first combined cavity, and the air pressure in the first combined cavity increases. The air with increased pressure pushes the pushing structure 5000 in the reverse direction away from the knife tip 1000, and at the same time pushes the elastic seal 6000 backward until the first combined cavity is in a sealed state, and the air pressure in the first combined cavity is the same as the external air pressure.

[0104] Furthermore, the exhaust pipe 3000 includes a notch 3100 provided at the head for adsorbing diseased tissue and an exhaust portion provided at the tail; the maximum displacement of the cutting tube 2000 moving backward is that the front end of the cutting tube 2000 is flush with the rear end face of the notch 3100; an annular gap 2100 is provided between the cutting tube 2000 and the exhaust pipe 3000, and the annular gap 2100 is provided with an annular seal 2200 at the rear end face of the notch 3100, and the annular seal 2200 blocks the notch 3100 from the space where the exhaust portion is located behind the notch 3100; the exhaust portion is evenly distributed with a number of micropores 3200 along the circumference, and the micropores are scattered in the area rearward of the annular seal 2200.

[0105] Furthermore, the base structure 4000 includes a base 4100 and a base extension tube 4200, and the pushing structure 5000 includes a push tube cover 5100, a push tube 5200, a valve tube 5300, a valve tube cover 5400 and a push plate 5500; the base 4100 is located at the tail of the exhaust pipe 3000, and the base extension tube 4200 is coaxially arranged at the tail of the base 4100; the push tube 5200 is coaxially assembled on the tail outer ring of the base extension tube 4200, and the push tube cover 5100 is coaxially arranged in front of the push tube 5200, and the push tube cover 5100 is coaxially arranged at the front of the push tube 5200. The rear end face is fixed to the front end face of the push cylinder 5200, and the push cylinder 5200 is externally mounted on the base extension cylinder 4200, and performs axial translational movement along the base extension cylinder 4200; the valve cylinder 5300 is arranged at the rear of the base 4100, nested on the outside of the cutting tube 2000, and coaxially arranged with the cutting tube 2000, and the valve cylinder cover 5400 is coaxially assembled at the rear of the valve cylinder 5300; the push plate 5500 is coaxially arranged at the rear of the valve cylinder cover 5400, and the front end face of the push plate 5500 is fixed to the rear end face of the valve cylinder cover 5400.

[0106] Furthermore, the base 4100 includes a first base boss 4110 , a second base boss 4120 , a third base boss 4130 , a first base countersunk hole 4140 and a second base countersunk hole 4150 ;

[0107] The first base boss 4110 is provided on the head of the base 4100;

[0108] The second base boss 4120 and the third base boss 4130 are coaxially arranged at the tail of the base 4100 , with the second base boss 4120 being located at the outer layer and the third base boss 4130 being located at the inner layer;

[0109] The first base counterbore 4140 is formed between the second base boss 4120 and the third base boss 4130;

[0110] The first base boss 4110 is connected to the third base boss 4130 , and a second base counterbore 4150 is formed at the connection between the first base boss 4110 and the third base boss 4130 ;

[0111] A base recess 4131 is provided on the outer side of the rear portion of the third base boss 4130 . The first sealing member 7000 is assembled in the base recess 4131 . The front and rear surfaces of the base recess 4131 axially fix the first sealing member 7000 .

[0112] The tail of the exhaust pipe 3000 is assembled in the inner hole of the first base boss 4110, the rear end face of the exhaust pipe 3000 is flush with the bottom surface of the second base countersunk hole 4150, and the connection between the exhaust pipe 300 and the first base boss 4110 is sealed.

[0113] Furthermore, the valve cylinder 5300 is arranged behind the third base boss 4130, nested on the outside of the cutting tube 2000, and coaxially matched with the cutting tube 2000;

[0114] The valve cylinder 5300 includes a first valve cylinder boss 5310, a second valve cylinder boss 5320, a third valve cylinder boss 5330, and a valve cylinder counterbore 5340. The first valve cylinder boss 5310 is provided at the head of the valve cylinder 5300, the second valve cylinder boss 5320 and the third valve cylinder boss 5330 are provided at the tail of the valve cylinder 5300, and the second valve cylinder boss 5320 is located on the outer layer of the third valve cylinder boss 5330.

[0115] The second valve cylinder boss 5320 and the third valve cylinder boss 5330 are coaxially arranged and form the valve cylinder counterbore 5340;

[0116] The head of the first valve cylinder boss 5310 is nested in the outer ring of the first sealing member 7000. The front end surface of the first valve cylinder boss 5310 is located at a first preset distance in front of the front end surface of the base recess 4131 and a second preset distance from the bottom surface of the first base counterbore 4140.

[0117] There is a first annular gap 5331 between the third valve cylinder boss 5330 and the cutting tube 2000, and air can flow freely in the first annular gap 5331;

[0118] The third valve cylinder boss 5330 has a plurality of valve cylinder boss grooves 5332 evenly distributed along the circumference, through which air circulates. The rear end surface of the third valve cylinder boss 5330 has a valve cylinder boss rounded corner 5333.

[0119] The first sealing member 7000 seals the inner side of the first valve cylinder boss 5310 and the outer side of the third seat boss 4130. A second annular gap 5311 is defined between the first valve cylinder boss 5310 and the third seat boss 4130. The first valve cylinder boss 5310 is capable of axial translation relative to the third seat boss 4130.

[0120] A first annular cavity 5112 is formed between the first valve cylinder boss 5310 and the cutting tube 2000. The first annular cavity 5112 has a certain volume and can store a certain amount of air.

[0121] Furthermore, the valve cylinder cover 5400 includes a cylinder cover inner hole 5410 and a cylinder cover boss 5420;

[0122] The cutting tube 2000 passes through the inner hole 5410 of the cylinder cover, and a third annular gap 5411 is formed between the cutting tube 2000 and the inner hole 5410 of the cylinder cover. Air can flow freely in the third annular gap 5411.

[0123] The cylinder cover boss 5420 is provided on the front end surface of the valve cylinder cover 5400 , and the cylinder cover boss 5420 is sleeved inside the second valve cylinder boss 5320 , and the connection surface between the cylinder cover boss 5420 and the second valve cylinder boss 5320 is sealed;

[0124] The outer diameter of the valve cylinder cover 5400 is equal to the outer diameter of the second valve cylinder boss 5320 .

[0125] Furthermore, there is a gap between the front end surface of the valve cylinder cover 5400 and the rear end surface of the third valve cylinder boss 5330, and the elastic seal 6000 is assembled in the gap and is coaxially arranged with the cutting tube 2000;

[0126] The elastic seal 6000 has a seal inner hole 6100 , the diameter of which is smaller than the outer diameter of the cutting tube 2000 , and the inner ring of the elastic seal 6000 is sealed with the outer ring of the cutting tube 2000 ;

[0127] The thickness of the elastic seal 6000 in the axial direction is smaller than the gap between the front end surface of the valve cylinder cover 5400 and the rear end surface of the third valve cylinder boss 5330 , and the elastic seal 6000 translates axially in the gap;

[0128] When the elastic seal 6000 translates forward until the front end face of the elastic seal 6000 contacts the rear end face of the third valve cylinder boss 5330 (as shown in FIG4 ), a fourth annular gap 5430 is formed between the rear end face of the elastic seal 6000 and the front end face of the valve cylinder cover 5400, and a fifth annular gap 5421 is formed between the outer ring of the elastic seal 6000 and the inner ring of the cylinder cover boss 5420, and air can flow freely between the fourth annular gap 5430 and the fifth annular gap 5421.

[0129] When the elastic seal 6000 translates backward until the rear end surface of the elastic seal 6000 contacts the front end surface of the valve cylinder cover 5400 (as shown in FIG. 3 ), the elastic seal 6000 is converted into a sealing state.

[0130] Furthermore, the push plate 5500 is provided with a push plate inner hole 5510 and a plurality of push plate ears 5520;

[0131] The cutting tube 2000 passes through the inner hole 5510 of the push plate, and a sixth annular gap 5511 is provided between the inner hole 5510 of the push plate and the cutting tube 2000. The diameter of the sixth annular gap 5511 is equal to that of the third annular gap 5411, and the air in the third annular gap 5411 and the sixth annular gap 5511 is connected to the outside world; the outer ring of the push plate 5500 is evenly distributed with a plurality of push plate ears 5520, and the front end face of the push plate 5500 is fixed to the rear end face of the valve cylinder cover 5400.

[0132] Furthermore, the base extension tube 4200 is assembled behind the third base boss 4130 , and the front end surface of the base extension tube 4200 is fixed to the rear end surface of the third base boss 4130 ;

[0133] The tail of the base extension tube 4200 is uniformly distributed with a plurality of extension tube slots 4210 along the circumference. The push plate ear piece 5520 translates in the extension tube slots 4210 until the front end surface of the push plate ear piece 5520 contacts the front end surface of the extension tube slot 4210.

[0134] The rear end surface of the base extension tube 4200 is provided with an extension tube countersunk hole 4220 , and a third preset distance is provided between the bottom surface of the extension tube countersunk hole 4220 and the front end surface 4211 of the extension tube through groove.

[0135] Furthermore, a plurality of push-cylinder half grooves 5210 are evenly distributed on the inner side of the head of the push-cylinder 5200 , and the push-plate lugs 5520 extend into the push-cylinder half grooves 5210 and translate in the push-cylinder half grooves 5210 ;

[0136] The rear end surface of the push plate ear 5520 is fixed to the rear end surface 5211 of the half groove of the push cylinder half groove 5210 . The push cylinder 5200 is externally mounted on the base extension cylinder 4200 and moves along the axial direction of the base extension cylinder 4200 .

[0137] Furthermore, a coaxial gripping tube 8000 is mounted on the rear of the base extension tube 4200 . The head of the gripping tube 8000 is provided with a first gripping boss 8100 , and the tail is provided with a second gripping boss 8200 .

[0138] The front end surface of the first gripping boss 8100 has a gripping annular recess 8110 , and the gripping annular recess 8110 and the extension tube recess 4220 of the base extension tube 4200 are nested and fixed to each other;

[0139] The push cylinder 5200 is externally mounted on the first gripping boss 8100 and moves axially along the first gripping boss 8100 until the rear end surface of the push cylinder 5200 contacts the front end surface of the second gripping boss 8200.

[0140] The sample collector of the biopsy excision device is arranged at the rear of the holding tube 8000 and is used to collect the excised diseased tissue.

[0141] Furthermore, it can be seen from the above that the push cylinder cover 5100, the push cylinder 5200, the valve cylinder 5300, the valve cylinder cover 5400 and the push plate 5500 are interconnected to form a whole and can translate together along the axial direction of the cutting tube 2000. The maximum position of the forward translation is that the front end face of the push plate ear 5520 contacts the front end face of the extension cylinder groove 4210 of the base extension cylinder 4200, and the maximum position of the backward translation is that the rear end face of the push cylinder 5200 contacts the front end face of the second gripping boss 8200.

[0142] The first combined cavity includes the second base countersunk hole 4150, the first annular cavity 5112, the valve tube countersunk hole 5340, the annular gap 2100, the first annular gap 5331, and the fifth annular gap 5421; the second combined cavity includes the sixth annular gap 5511 and the third annular gap 5411.

[0143] When the doctor performs the rotary evacuation surgery, the specific working process of the present invention is as follows:

[0144] Hold the push cylinder 5200 and puncture the notch 3100 toward the location of the diseased tissue. The push cylinder 5200 moves forward relative to the knife tip 1000. At this time, the elastic seal 6000 is in the initial maximum backward position. The volume of the first combined cavity composed of the second base countersunk hole 4150, the first annular cavity 5112, the valve cylinder countersunk hole 5340, the annular gap 2100, the first annular gap 5331, and the fifth annular gap 5421 is reduced, and the air stored in these areas is compressed. The pressurized air flows toward the unsealed area. From the above description, it can be seen that the air can only be discharged outward from the micropores 3200 of the exhaust pipe 3000 into the tissue. After the air is discharged, the above-mentioned combined cavity The pressure in the cavity decreases, and the external air pushes the elastic seal 6000 forward through the sixth annular gap 5511 and the third annular gap 5411, and the fourth annular gap 5430 appears. The external air continues to flow forward through the fourth annular gap 5430, pushing the elastic seal 6000 to the forward flipped state with the valve cylinder boss fillet 5333 as the fulcrum as shown in Figure 5, and then backfilling into the above-mentioned first combined cavity through the valve cylinder boss groove 5332. The pressure in the first combined cavity increases, and the push cylinder 5200 is pushed backward to the maximum position by the gas with increased pressure, and at the same time, the elastic seal 6000 is pushed backward to the maximum position until the gas pressure in the first combined cavity is equal to that of the outside world. The doctor's puncture process is usually an intermittent step-by-step puncture method, and the interval between each step is also the process of the above-mentioned external gas backfilling into the combined cavity. This cycle repeats, and gas is discharged from the micropore 3200 into the tissue during the entire puncture process. The exhaust tube 3000 will not be wrapped by tissue and form negative pressure on its surface, which effectively reduces the resistance during the entire puncture process.

[0145] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

[0146] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A self-venting biopsy peeling device, characterized in that: include: Knife tip, cutting tube, exhaust pipe, base structure, pushing structure, first combined cavity, second combined cavity, elastic sealing element; The knife tip is arranged at the front end of the biopsy peeling device, and the exhaust pipe is coaxially mounted on the rear boss of the knife tip; The cutting tube is sleeved in the exhaust pipe and is coaxially arranged with the exhaust pipe, and performs axial cutting movement in the exhaust pipe. The exhaust pipe is assembled inside the base structure; The first combined cavity is arranged in front of the elastic sealing member, and the second combined cavity is arranged behind the elastic sealing member, and the elastic sealing member is used to control the sealing and opening of the first combined cavity; When the pushing structure is held to puncture the diseased tissue, the first combined cavity is in a sealed state, the pushing structure moves toward the knife tip, the volume of the first combined cavity in front of the elastic sealing member decreases, the air in the first combined cavity is compressed and pressurized, and the pressurized air is discharged from the exhaust pipe to the diseased tissue; When the air is discharged from the exhaust pipe, the pressure in the first combined cavity decreases, and the external air pushes the elastic seal forward from the second combined cavity located behind the elastic seal, and the first combined cavity is transformed into an open state. The external air backfills the first combined cavity, and the air pressure in the first combined cavity increases. The air with increased pressure pushes the pushing structure in the reverse direction away from the knife tip, and at the same time pushes the elastic seal backward until the first combined cavity is in a sealed state. The air pressure in the first combined cavity is the same as the external air pressure.

2. The self-exhausting biopsy peeling device according to claim 1, characterized in that: The exhaust pipe includes a notch provided at the head for absorbing the diseased tissue and an exhaust portion provided at the tail; The maximum displacement of the cutting tube moving backward is that the front end of the cutting tube is flush with the rear end surface of the notch; An annular gap is provided between the cutting pipe and the exhaust pipe, and an annular seal is provided at the rear end surface of the notch in the annular gap, and the annular seal blocks the notch from the space where the exhaust part is located behind the notch; The exhaust part is evenly distributed with a plurality of micro holes along the whole body.

3. The self-exhausting biopsy peeling device according to claim 1, characterized in that: The base structure includes a base and a base extension cylinder, and the push structure includes a push cylinder cover, a push cylinder, a valve cylinder, a valve cylinder cover and a push plate; The base is located at the rear of the exhaust pipe, and the base extension tube is coaxially arranged at the rear of the base; The push cylinder is coaxially assembled on the rear outer ring of the base extension cylinder, the push cylinder cover is coaxially arranged in front of the push cylinder, the rear end face of the push cylinder cover is fixed to the front end face of the push cylinder, the push cylinder is outer-mounted on the base extension cylinder, and performs axial translational movement along the base extension cylinder; The valve cylinder is arranged at the rear of the base, nested at the outer side of the cutting tube, and coaxially arranged with the cutting tube, and the valve cylinder cover is coaxially assembled at the rear of the valve cylinder; The push plate is coaxially arranged behind the valve cylinder cover, and the front end surface of the push plate is fixed to the rear end surface of the valve cylinder cover.

4. The self-exhausting biopsy peeling device according to claim 3, characterized in that: The base comprises a first base boss, a second base boss, a third base boss, a first base countersunk hole and a second base countersunk hole; The first base boss is arranged on the head of the base; The second base boss and the third base boss are coaxially arranged at the tail of the base, the second base boss is located at the outer layer, and the third base boss is located at the inner layer; The first base counterbore is formed between the second base boss and the third base boss; The first base boss is connected to the third base boss, and the second base countersunk hole is formed at the connection between the first base boss and the third base boss; A base recess is provided on the outer side of the tail portion of the third base boss, the first sealing member is assembled in the base recess, and the front end face and the rear end face of the base recess axially fix the first sealing member; The tail of the exhaust pipe is assembled in the inner hole of the first base boss, the rear end surface of the exhaust pipe is flush with the bottom surface of the second base countersunk hole, and the connection between the exhaust pipe and the first base boss is sealed.

5. The self-exhausting biopsy peeling device according to claim 4, characterized in that: The valve cylinder is arranged behind the third base boss, nested on the outside of the cutting tube, and coaxially matched with the cutting tube; The valve cylinder comprises a first valve cylinder boss, a second valve cylinder boss, a third valve cylinder boss and a valve cylinder counterbore, the first valve cylinder boss is arranged at the head of the valve cylinder, the second valve cylinder boss and the third valve cylinder boss are arranged at the tail of the valve cylinder, and the second valve cylinder boss is located at the outer layer of the third valve cylinder boss; The second valve cylinder boss and the third valve cylinder boss are coaxially arranged and form the valve cylinder counterbore; The head of the first valve cylinder boss is nested in the outer ring of the first sealing member, and the front end surface of the first valve cylinder boss is located at a first preset distance in front of the front end surface of the base recess and a second preset distance from the bottom surface of the first base recess; A first annular gap is provided between the third valve cylinder boss and the cutting tube, and air can flow freely in the first annular gap; The third valve cylinder boss is uniformly provided with a plurality of valve cylinder boss through grooves along the circumferential direction, and air flows through the valve cylinder boss through grooves. The rear end surface of the third valve cylinder boss has a valve cylinder boss rounded corner; The first sealing member seals the inner side of the first valve cylinder boss and the outer side of the third base boss, a second annular gap is provided between the first valve cylinder boss and the third base boss, and the first valve cylinder boss moves axially and translationally relative to the third base boss; A first annular cavity is formed between the first valve cylinder boss and the cutting tube.

6. The self-exhausting biopsy peeling device according to claim 5, characterized in that: The valve cylinder cover comprises a cylinder cover inner hole and a cylinder cover boss; The cutting tube passes through the inner hole of the cylinder cover, and a third annular gap is formed between the cutting tube and the inner hole of the cylinder cover, and air flows freely in the third annular gap; The cylinder cover boss is arranged on the front end surface of the valve cylinder cover, the cylinder cover boss is sleeved inside the second valve cylinder boss, and the connection surface between the cylinder cover boss and the second valve cylinder boss is sealed; The outer diameter of the valve cylinder cover is equal to the outer diameter of the second valve cylinder boss.

7. The self-exhausting biopsy peeling device according to claim 6, characterized in that: There is a gap between the front end surface of the valve cylinder cover and the rear end surface of the third valve cylinder boss, and the elastic sealing member is assembled in the gap and is coaxially arranged with the cutting tube; The elastic seal has an inner hole of the seal, the diameter of the inner hole of the seal is smaller than the outer diameter of the cutting tube, and the inner ring of the elastic seal is sealed with the outer ring of the cutting tube; The thickness of the elastic seal in the axial direction is smaller than the gap between the front end surface of the valve cylinder cover and the rear end surface of the third valve cylinder boss, and the elastic seal translates axially in the gap; When the elastic seal moves forward until the front end face of the elastic seal contacts the rear end face of the third valve cylinder boss, a fourth annular gap exists between the rear end face of the elastic seal and the front end face of the valve cylinder cover, and a fifth annular gap exists between the outer ring of the elastic seal and the inner ring of the cylinder cover boss, and air flows freely between the fourth annular gap and the fifth annular gap; When the elastic seal moves backwards in translation until the rear end surface of the elastic seal contacts the front end surface of the valve cylinder cover, the elastic seal is converted into a sealing state.

8. The self-exhausting biopsy peeling device according to claim 7, characterized in that: The push plate is provided with a push plate inner hole and a plurality of push plate ears; The cutting tube passes through the inner hole of the push plate, a sixth annular gap is provided between the inner hole of the push plate and the cutting tube, the sixth annular gap has the same diameter as the third annular gap, and the air in the third annular gap and the sixth annular gap is in communication with the outside; The outer ring of the push plate is evenly distributed with a plurality of push plate ears, and the front end surface of the push plate is fixed to the rear end surface of the valve cylinder cover.

9. The self-exhausting biopsy peeling device according to claim 8, characterized in that: The base extension tube is assembled at the rear of the third base boss, and the front end surface of the base extension tube is fixed to the rear end surface of the third base boss; The tail of the base extension tube is uniformly provided with a plurality of extension tube through grooves along the circumferential direction, and the push plate ear piece translates in the extension tube through groove and translates forward until the front end surface of the push plate ear piece contacts the front end surface of the extension tube through groove; The rear end surface of the base extension tube is provided with an extension tube countersunk hole, and a third preset distance exists between the bottom surface of the extension tube countersunk hole and the front end surface of the extension tube through groove.

10. The self-exhausting biopsy peeling device according to claim 9, characterized in that: A plurality of push-tube half grooves are evenly distributed on the inner side of the push-tube head, and the push-plate ear pieces extend into the push-tube half grooves and translate in the push-tube half grooves; The rear end surface of the push plate ear is fixed to the rear end surface of the half groove of the push tube half groove, and the push tube is sleeved on the base extension tube and translates along the axial direction of the base extension tube.

11. The self-exhausting biopsy peeling device according to claim 10, characterized in that: A coaxial holding tube is mounted at the rear of the base extension tube, a first holding boss is disposed at the head of the holding tube, and a second holding boss is disposed at the tail; The front end surface of the first gripping boss is provided with a gripping annular recessed groove, and the gripping annular recessed groove and the extension tube recessed hole of the base extension tube are mutually nested and fixed; The push tube is sleeved on the first holding boss, and is axially translated along the first holding boss, and is translated backward until the rear end surface of the push tube contacts the front end surface of the second holding boss; The sample collector of the biopsy excision device is arranged at the rear of the holding tube and is used for collecting the excised diseased tissue.

12. The self-exhausting biopsy peeling device according to claim 11, characterized in that: Also includes: The push tube cover, the push tube, the valve tube, the valve tube cover and the push plate are connected to each other to form a whole and can translate together along the axial direction of the cutting tube, the maximum forward translation position is when the front end surface of the push plate ear piece contacts the front end surface of the extension tube through groove of the base extension tube, and the maximum backward translation position is when the rear end surface of the push tube contacts the front end surface of the second holding boss; The first combined cavity includes the second base counterbore, the first annular cavity, the valve tube counterbore, the annular gap, the first annular gap, and the fifth annular gap; The second combined cavity includes the sixth annular gap and the third annular gap.

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