A self-venting biopsy excision device

Abstract

This invention relates to the field of biopsy excision technology, and provides a self-venting biopsy excision device, comprising: a blade tip disposed at the front end of the device, with an exhaust pipe coaxially mounted on the tail protrusion of the blade tip; a cutting tube sleeved inside the exhaust pipe and coaxially fitted with the exhaust pipe, performing axial cutting motion within the exhaust pipe, the exhaust pipe being assembled inside a base structure; a first combined cavity disposed in front of an elastic seal, and a second combined cavity disposed behind the elastic seal, the elastic seal being used to control the sealing and opening of the first combined cavity. It has the function of pressurizing and venting air into the tissue during puncture, solving the problem of negative pressure adhesion caused by tissue encapsulation of the blade tube, greatly reducing the resistance for doctors during puncture, and providing a safe and reliable environment for doctors during puncture. Simultaneously, this invention utilizes air from the natural environment to achieve the pressurization and venting effect on the tissue, without introducing other types of energy, possessing certain safety and economic advantages.

Description

Technical Field

[0001] This invention relates to the technical field of biopsy excision, and more particularly to a self-venting biopsy excision device. Background Technology

[0002] Biopsy excision devices are typically used to remove breast tissue with abnormalities diagnosed on imaging under ultrasound guidance. This type of breast surgery requires a small incision in the breast skin, through which the blade of the excision device is inserted into the lesion. The negative pressure provided by the main unit of the biopsy excision device draws the tissue into the blade groove, and the power provided by the main unit drives the cutting tube of the excision device to excise the tissue. The excised tissue is transported through the negative pressure provided by the main unit of the biopsy excision device to the sample collector at the tail of the device, thus completing the surgery.

[0003] Before performing a surgical excision of abnormal breast tissue, the biopsy tube must first be inserted into the lesion site. This puncture process is usually the most time-consuming step. The main reason is that breast tissue is elastic and easily forms a tissue covering the biopsy tube during the puncture process. Secondly, the diameter of the biopsy tube of the rotary biopsy device is much larger than that of a conventional biopsy needle, and the biopsy tube is mostly made of smooth stainless steel. During the puncture process, the tissue can easily completely cover the biopsy tube. Once it covers a certain extent, a negative pressure will be formed between the tissue and the surface of the biopsy tube, which will cause the tissue to adhere to the biopsy tube, thus obstructing the puncture.

[0004] If a doctor encounters resistance during a puncture, they will inevitably increase the puncture force in order to continue inserting the needle. Once the needle breaks free from the negative pressure of the tissue, it will suddenly leap forward. If the tip of the needle is near a vital organ at this time, it will cause irreversible damage to the patient, resulting in a medical accident. Summary of the Invention

[0005] To address the aforementioned problems, the present invention aims to provide a self-venting biopsy excision device that pressurizes and vents air into the tissue during puncture. This solves the problem of negative pressure adhesion caused by tissue encapsulation of the excision tube, significantly reducing resistance for the surgeon during puncture and providing a safe and reliable environment. It also saves time in breast biopsy procedures and protects the health and interests of patients. Furthermore, the device utilizes ambient air to pressurize and vent the tissue without introducing other forms of energy, offering a degree of safety and economy. This can save costs for manufacturers, thereby reducing instrument expenses for patients and ultimately benefiting them.

[0006] The above-mentioned objective of this invention is achieved through the following technical solutions:

[0007] A self-venting biopsy excision device includes: a blade tip, a cutting tube, an exhaust tube, a base structure, a pushing structure, a first combined cavity, a second combined cavity, and an elastic sealing element;

[0008] The blade tip is located at the front end of the biopsy excision device, and the exhaust pipe is coaxially mounted on the tail protrusion of the blade tip.

[0009] The cutting tube is fitted inside the exhaust pipe and is coaxially fitted with the exhaust pipe, and performs axial cutting motion in the exhaust pipe. The exhaust pipe is assembled inside the base structure.

[0010] The first combined cavity is located in front of the elastic seal, and the second combined cavity is located behind the elastic seal. The elastic seal is used to control the sealing and opening of the first combined cavity.

[0011] When the push structure is held and punctured at the lesion site, the first combined cavity is in a sealed state. The push structure moves towards the blade tip, and the volume of the first combined cavity in front of the elastic seal decreases. The air in the first combined cavity is compressed and pressurized, and the pressurized air is discharged outward from the exhaust pipe into the lesion tissue.

[0012] When air is discharged from the exhaust pipe, the pressure in the first combined cavity decreases. External air pushes the elastic seal forward from the second combined cavity located behind the elastic seal, and the first combined cavity becomes open. External air backfills the first combined cavity, and the air pressure in the first combined cavity increases. The increased air pressure pushes the pushing structure away from the blade tip and pushes the elastic seal backward until the first combined cavity is sealed. The air pressure in the first combined cavity is the same as the external air pressure.

[0013] Furthermore, the exhaust pipe includes a slot at the head for adsorbing diseased tissue and an exhaust section at the tail.

[0014] The maximum backward displacement of the cutting tube is such that the front end of the cutting tube is flush with the rear end face of the groove.

[0015] An annular gap is provided between the cutting pipe and the exhaust pipe. An annular seal is provided at the rear end face of the groove, and the annular seal isolates the groove from the space where the exhaust part is located behind the groove.

[0016] The exhaust section has several micropores evenly distributed around its perimeter.

[0017] Furthermore, the base structure includes a base and a base extension tube, and the pushing structure includes a push tube cover, a push tube, a valve tube, a valve tube cover, and a push plate;

[0018] The base is located at the tail of the exhaust pipe, and the base extension tube is coaxially disposed at the tail of the base.

[0019] The push cylinder is coaxially mounted on the outer ring of the tail of the base extension cylinder, the push cylinder cover is coaxially disposed 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 sleeved on the base extension cylinder and moves axially along the base extension cylinder;

[0020] The valve cylinder is located behind the base, nested on the outside of the cutting tube, and coaxially arranged with the cutting tube. The valve cylinder cover is coaxially assembled behind the valve cylinder.

[0021] The push plate is coaxially disposed behind the valve cylinder cover, and the front end face of the push plate is fixed to the rear end face of the valve cylinder cover.

[0022] 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;

[0023] The first base boss is disposed at the head of the base;

[0024] The second base boss and the third base boss are coaxially disposed at the tail of the base, with the second base boss located on the outer layer and the third base boss located on the inner layer.

[0025] The first base countersunk hole is formed between the second base boss and the third base boss;

[0026] The first base boss and the third base boss are connected, and a second base countersunk hole is formed at the connection between the first base boss and the third base boss;

[0027] The outer side of the tail of the third base boss is provided with a base groove, and the first seal is assembled in the base groove. The front end face and the rear end face of the base groove axially fix the first seal.

[0028] The tail end of the exhaust pipe is fitted into the inner hole of the first base boss, the rear end face of the exhaust pipe is flush with the bottom surface of the countersunk hole of the second base, and the connection between the exhaust pipe and the first base boss is sealed.

[0029] Furthermore, the valve cylinder is located behind the third base boss, nested on the outside of the cutting tube, and coaxially fitted with the cutting tube;

[0030] 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 located at the head of the valve cylinder, and the second valve cylinder boss and the third valve cylinder boss are located at the tail of the valve cylinder. The second valve cylinder boss is located on the outer layer of the third valve cylinder boss.

[0031] The second valve cylinder boss and the third valve cylinder boss are coaxially arranged and form the valve cylinder countersunk hole;

[0032] The head of the first valve cylinder boss is nested in the outer ring of the first seal, and the front end face of the first valve cylinder boss is located at a first preset distance in front of the front end face of the base groove and at a second preset distance from the bottom surface of the first base recess.

[0033] There is a first annular gap between the third valve cylinder boss and the cutting tube, in which air can flow freely.

[0034] The third valve cylinder boss has several valve cylinder boss through slots evenly distributed around its circumference, through which air flows. The rear end face of the third valve cylinder boss has valve cylinder boss rounded corners.

[0035] The first seal seals the inner side of the first valve cylinder boss and the outer side of the third base boss. There is a second annular gap between the first valve cylinder boss and the third base boss. The first valve cylinder boss moves axially relative to the third base boss.

[0036] A first annular cavity is formed between the first valve cylinder boss and the cutting tube.

[0037] Furthermore, the valve cylinder cover includes a cylinder cover inner hole and a cylinder cover boss;

[0038] 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, allowing air to flow freely within the third annular gap;

[0039] The cylinder cover boss is disposed on the front end face 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.

[0040] The outer diameter of the valve cylinder cover is equal to the outer diameter of the second valve cylinder boss.

[0041] Furthermore, there is a gap between the front end face of the valve cylinder cover and the rear end face of the third valve cylinder boss, and the elastic seal is assembled in the gap and is coaxially arranged with the cutting tube;

[0042] 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 seals with the outer ring of the cutting tube.

[0043] The axial thickness of the elastic seal is less than the gap between the front end face of the valve cylinder cover and the rear end face of the third valve cylinder boss, and the elastic seal translates axially within the gap.

[0044] When the elastic seal moves forward until its front end face contacts the rear end face of the third valve cylinder boss, there is a fourth annular gap between the rear end face of the elastic seal and the front end face of the valve cylinder cover, and a fifth annular gap between the outer ring of the elastic seal and the inner ring of the cylinder cover boss, allowing air to flow freely between the fourth annular gap and the fifth annular gap.

[0045] When the elastic seal moves backward until its rear end face contacts the front end face of the valve cylinder cover, the elastic seal switches to a sealing state.

[0046] Furthermore, the push plate is provided with an inner hole and several push plate lugs;

[0047] 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.

[0048] The outer ring of the push plate is evenly distributed with a number of push plate lugs, and the front end face of the push plate is fixed to the rear end face of the valve cylinder cover.

[0049] Furthermore, the base extension tube is assembled behind the third base boss, and the front end face of the base extension tube is fixed to the rear end face of the third base boss.

[0050] The base extension tube has several extension tube slots evenly distributed around its tail end. The push plate lug moves horizontally in the extension tube slots and moves forward until the front end face of the push plate lug contacts the front end face of the extension tube slot.

[0051] The rear end face of the base extension tube is provided with an extension tube countersunk hole, and there is a third preset distance between the bottom surface of the extension tube countersunk hole and the front end face of the extension tube through groove.

[0052] Furthermore, the inner side of the head of the push cylinder is evenly distributed with several push cylinder half-grooves, and the push plate ear extends into the push cylinder half-grooves and moves horizontally within the push cylinder half-grooves;

[0053] The rear end face of the push plate lug is fixed to the rear end face of the half groove of the push cylinder, and the push cylinder is sleeved on the base extension cylinder and moves along the axial direction of the base extension cylinder.

[0054] Furthermore, a coaxial gripping tube is fitted behind the base extension tube, and a first gripping boss is provided at the head of the gripping tube and a second gripping boss is provided at the tail.

[0055] The front end face of the first gripping boss has a gripping annular groove, and the gripping annular groove is nested and fixed to the countersunk hole of the extension tube of the base extension tube;

[0056] The push cylinder is fitted onto the first gripping boss and moves axially along the first gripping boss until the rear end face of the push cylinder contacts the front end face of the second gripping boss.

[0057] The sample collector of the biopsy excision device is located behind the holding tube and is used to collect the excised lesion tissue.

[0058] Furthermore, the push cylinder cover, the push cylinder, the valve cylinder, the valve cylinder cover, and the push plate are interconnected to form a whole and can be translated together along the axial direction of the cutting tube. The maximum forward translation position is when the front end face of the push plate lug contacts the front end face of the extension cylinder through groove of the base extension cylinder, and the maximum backward translation position is when the rear end face of the push cylinder contacts the front end face of the second gripping boss.

[0059] The first combined cavity includes the second base countersunk hole, the first annular cavity, the valve cylinder countersunk hole, the annular gap, the first annular gap, and the fifth annular gap;

[0060] The second combined cavity includes the sixth annular gap and the third annular gap.

[0061] Compared with the prior art, the present invention has at least one of the following beneficial effects:

[0062] (1) By providing a self-venting biopsy excision device, which has the function of pressurizing and venting air into the tissue during the puncture process, the problem of negative pressure adhesion formed by the tissue covering the knife tube is solved, which greatly reduces the resistance of doctors during the puncture process, provides doctors with a safe and reliable environment during the puncture process, saves time for breast excision surgery, and protects the health and interests of patients.

[0063] (2) This invention uses air from the natural environment as a medium to continuously expel air into the tissue during the puncture process of the biopsy without introducing other energy, which solves the problem of negative pressure adhesion caused by tissue wrapping the blade tube. It is economical and can save costs for biopsy biopsy devices, bringing benefits to patients. Attached Figure Description

[0064] Figure 1 This is a schematic diagram of the overall structure of the self-venting biopsy excision device of the present invention;

[0065] Figure 2 For the present invention Figure 1 A cross-sectional view of a self-venting biopsy excision device;

[0066] Figure 3 For the present invention Figure 2 An enlarged schematic diagram of position A when the elastic seal is in its initial rearward maximum position;

[0067] Figure 4 For the present invention Figure 2 An enlarged schematic diagram of position A where the elastic seal is pushed forward and backward to form the fourth annular gap;

[0068] Figure 5 For the present invention Figure 2 An enlarged schematic diagram of the flexible seal being pushed forward to position A in a flipped state;

[0069] Figure 6 This is a partial schematic diagram of the base extension tube of the present invention;

[0070] Figure 7 This is a partial schematic diagram of the pusher of the present invention;

[0071] Figure 8 This is a partial schematic diagram of the valve cylinder, elastic seal, and valve cylinder cover of the present invention;

[0072] Figure 9 This is a partial schematic diagram of the push plate of the present invention.

[0073] Figure Labels

[0074] 1000: Blade tip; 2000: Cutting tube; 3000: Exhaust pipe; 4000: Base structure; 5000: Pushing structure; 6000: Elastic seal; 7000: First seal; 8000: Grip tube;

[0075] 2100: Annular gap; 2200: Annular seal;

[0076] 3100: Groove; 3200: Micropore;

[0077] 4100: Base; 4200: Base extension tube;

[0078] 4110: First base boss; 4120: Second base boss; 4130: Third base boss; 4140: First base countersunk hole; 4150: Second base countersunk hole;

[0079] 4131: Base recess;

[0080] 4210: Extension tube through groove; 4220: Extension tube countersunk hole;

[0081] 4211: Front end face of the extension tube through groove;

[0082] 5100: Push cylinder cover; 5200: Push cylinder; 5300: Valve cylinder; 5400: Valve cylinder cover; 5500: Push plate;

[0083] 5210: Push tube half-groove;

[0084] 5211: Rear end face of the half-groove;

[0085] 5310: First valve cylinder boss; 5320: Second valve cylinder boss; 5330: Third valve cylinder boss; 5340: Valve cylinder countersunk hole;

[0086] 5311: Second annular gap; 5112: First annular cavity;

[0087] 5331: First annular gap; 5332: Valve cylinder boss through groove; 5333: Valve cylinder boss fillet;

[0088] 5410: Inner hole of cylinder cover; 5420: Boss of cylinder cover; 5430: Fourth annular gap;

[0089] 5411: Third annular gap;

[0090] 5421: Fifth annular gap;

[0091] 5510: Push plate inner hole; 5520: Push plate lug;

[0092] 5511: Sixth annular gap;

[0093] 6100: Inner bore of the seal;

[0094] 8100: First gripping boss; 8200: Second gripping boss;

[0095] 8110: Hold the annular sinker. Detailed Implementation

[0096] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0097] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the term “comprising” as used in this specification means the presence of the stated features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0098] First Embodiment

[0099] like Figure 1-9 As shown, this embodiment provides a self-venting biopsy excision 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 sealing element 6000.

[0100] Explanation of the orientation in the illustrations of this invention: The orientation from left to right represents front and back (head and tail). Explanation of the fixing method in this invention: The fixing method is not limited to gluing, fusion welding, tight fitting, etc. The specific structure of this invention will be described in detail below.

[0101] The blade tip 1000 is disposed at the front end of the biopsy excision device, and the exhaust pipe 3000 is coaxially mounted on the tail protrusion 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 inside the exhaust pipe 3000 and is coaxially fitted with the exhaust pipe 3000, and performs axial cutting motion within the exhaust pipe 3000. The exhaust pipe 3000 is assembled inside the base structure 4000. The first combined cavity is disposed in front of the elastic seal 6000, and the second combined cavity is disposed behind the elastic seal 6000. The elastic seal 6000 is used to control the sealing and opening of the first combined cavity.

[0102] When the push structure 5000 is held and punctured at the lesion site, the first combined cavity is in a sealed state. The push structure 5000 moves towards the blade tip 1000, and the volume of the first combined cavity 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 lesion tissue. After the air is discharged from the exhaust pipe 3000, the pressure of 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. The first combined cavity changes to an open state, and the external air backfills the first combined cavity. The air pressure in the first combined cavity increases, and the increased air pressure pushes the push structure 5000 away from the blade tip 1000 in the opposite direction. At the same time, it pushes the elastic seal 6000 backward until the first combined cavity is sealed. The air pressure in the first combined cavity is the same as the external air pressure.

[0103] Further, the exhaust pipe 3000 includes a slot 3100 at the head for adsorbing diseased tissue and an exhaust section at the tail; the maximum rearward displacement of the cutting pipe 2000 is such that the front end of the cutting pipe 2000 is flush with the rear end face of the slot 3100; an annular gap 2100 is provided between the cutting pipe 2000 and the exhaust pipe 3000, and an annular seal 2200 is provided at the rear end face of the slot 3100 in the annular gap 2100, the annular seal 2200 blocking the slot 3100 from the space where the exhaust section is located behind the slot 3100; the exhaust section has a plurality of micropores 3200 evenly distributed around its periphery, the micropores being scattered in the area behind the annular seal 2200.

[0104] Further, 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 disposed at the tail of the base 4100; the push tube 5200 is coaxially assembled to the outer ring of the tail of the base extension tube 4200, and the push tube cover 5100 is coaxially disposed in front of the push tube 5200, and the push tube cover 5100... The rear end face is fixed to the front end face of the push cylinder 5200. The push cylinder 5200 is sleeved on the base extension cylinder 4200 and moves axially along the base extension cylinder 4200. The valve cylinder 5300 is located behind the base 4100, nested outside the cutting tube 2000, and coaxially arranged with the cutting tube 2000. The valve cylinder cover 5400 is coaxially assembled behind the valve cylinder 5300. The push plate 5500 is coaxially arranged behind 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.

[0105] 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.

[0106] The first base boss 4110 is disposed at the head of the base 4100;

[0107] The second base boss 4120 and the third base boss 4130 are coaxially disposed at the tail of the base 4100, with the second base boss 4120 located on the outer layer and the third base boss 4130 located on the inner layer.

[0108] The first base countersunk hole 4140 is formed between the second base boss 4120 and the third base boss 4130;

[0109] The first base boss 4110 and the third base boss 4130 are connected, and the second base countersunk hole 4150 is formed at the connection between the first base boss 4110 and the third base boss 4130.

[0110] The third base boss 4130 has a base groove 4131 on the outer side of its tail. The first sealing member 7000 is assembled in the base groove 4131. The front end face and the rear end face of the base groove 4131 axially fix the first sealing member 7000.

[0111] The tail end of the exhaust pipe 3000 is fitted into 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. The connection between the exhaust pipe 300 and the first base boss 4110 is sealed.

[0112] Furthermore, the valve cylinder 5300 is located behind the third base boss 4130, nested on the outside of the cutting tube 2000, and coaxially configured with the cutting tube 2000.

[0113] 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 countersunk hole 5340. The first valve cylinder boss 5310 is disposed at the head of the valve cylinder 5300, and the second valve cylinder boss 5320 and the third valve cylinder boss 5330 are disposed at the tail of the valve cylinder 5300. The second valve cylinder boss 5320 is located on the outer layer of the third valve cylinder boss 5330.

[0114] The second valve cylinder boss 5320 and the third valve cylinder boss 5330 are coaxially arranged and form the valve cylinder countersunk hole 5340.

[0115] The head of the first valve cylinder boss 5310 is nested in the outer ring of the first sealing member 7000. The front end face of the first valve cylinder boss 5310 is located at a first preset distance in front of the front end face of the base groove 4131 and at a second preset distance from the bottom surface of the first base recess 4140.

[0116] 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.

[0117] The third valve cylinder boss 5330 has a plurality of valve cylinder boss through slots 5332 evenly distributed in the circumferential direction, and air flows in the valve cylinder boss through slots 5332. The rear end face of the third valve cylinder boss 5330 has a valve cylinder boss fillet 5333.

[0118] The first seal 7000 seals the inner side of the first valve cylinder boss 5310 and the outer side of the third base boss 4130. There is a second annular gap 5311 between the first valve cylinder boss 5310 and the third base boss 4130. The first valve cylinder boss 5310 moves axially relative to the third base boss 4130.

[0119] 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.

[0120] Furthermore, the valve cylinder cover 5400 includes a cylinder cover inner hole 5410 and a cylinder cover boss 5420;

[0121] 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, through which air can freely circulate.

[0122] The cylinder cover boss 5420 is disposed on the front end face of the valve cylinder cover 5400. The cylinder cover boss 5420 is sleeved inside the second valve cylinder boss 5320. The connection surface between the cylinder cover boss 5420 and the second valve cylinder boss 5320 is sealed.

[0123] The outer diameter of the valve cylinder cover 5400 is equal to the outer diameter of the second valve cylinder boss 5320.

[0124] Furthermore, there is a gap between the front end face of the valve cylinder cover 5400 and the rear end face 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.

[0125] The elastic seal 6000 has a sealing 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 seals with the outer ring of the cutting tube 2000.

[0126] The axial thickness of the elastic seal 6000 is less than the gap between the front end face of the valve cylinder cover 5400 and the rear end face of the third valve cylinder boss 5330, and the elastic seal 6000 translates axially within the gap.

[0127] When the elastic seal 6000 moves forward until its front end face contacts the rear end face of the third valve cylinder boss 5330 (e.g.) Figure 4 As shown), there is a fourth annular gap 5430 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 between the outer ring of the elastic seal 6000 and the inner ring of the cylinder cover boss 5420, and air can freely flow between the fourth annular gap 5430 and the fifth annular gap 5421.

[0128] When the elastic seal 6000 is moved backward until its rear end face contacts the front end face of the valve cylinder cover 5400 (e.g.) Figure 3 As shown), the elastic seal 6000 is switched to a sealed state.

[0129] Furthermore, the push plate 5500 is provided with a push plate inner hole 5510 and a plurality of push plate lugs 5520;

[0130] The cutting tube 2000 passes through the inner hole 5510 of the push plate. 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. The air in the third annular gap 5411 and the sixth annular gap 5511 is in communication with the outside. A plurality of push plate lugs 5520 are evenly distributed on the outer ring of the push plate 5500. The front end face of the push plate 5500 is fixed to the rear end face of the valve cylinder cover 5400.

[0131] Furthermore, the base extension tube 4200 is assembled behind the third base boss 4130, and the front end face of the base extension tube 4200 is fixed to the rear end face of the third base boss 4130.

[0132] The tail of the base extension tube 4200 has several extension tube slots 4210 evenly distributed around its circumference. The push plate ear 5520 moves horizontally in the extension tube slots 4210 and moves forward until the front end face of the push plate ear 5520 contacts the front end face of the extension tube slot 4210.

[0133] The rear end face of the base extension tube 4200 is provided with an extension tube countersunk hole 4220, and there is a third preset distance between the bottom surface of the extension tube countersunk hole 4220 and the front end face 4211 of the extension tube through groove.

[0134] 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 ear 5520 extends into the push cylinder half-grooves 5210 and moves in the push cylinder half-grooves 5210.

[0135] The rear end face of the push plate ear 5520 is fixed to the rear end face 5211 of the half groove of the push cylinder half groove 5210. The push cylinder 5200 is sleeved on the base extension cylinder 4200 and translates along the axial direction of the base extension cylinder 4200.

[0136] Furthermore, a coaxial gripping cylinder 8000 is fitted behind the base extension cylinder 4200. The head of the gripping cylinder 8000 is provided with a first gripping boss 8100, and the tail is provided with a second gripping boss 8200.

[0137] The front end face of the first gripping boss 8100 has a gripping annular recess 8110, and the gripping annular recess 8110 is nested and fixed with the extension tube recess 4220 of the base extension tube 4200.

[0138] The push cylinder 5200 is fitted onto the first gripping boss 8100 and is translated along the axial direction of the first gripping boss 8100, and is translated rearward until the rear end face of the push cylinder 5200 contacts the front end face of the second gripping boss 8200.

[0139] The sample collector of the biopsy excision device is located behind the holding cylinder 8000 and is used to collect the excised lesion tissue.

[0140] Furthermore, as can be seen from the above, 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 be translated together along the axial direction of the cutting tube 2000. The maximum forward translation position is when the front end face of the push plate lug 5520 contacts the front end face of the extension cylinder through groove 4210 of the base extension cylinder 4200, and the maximum backward translation position is when the rear end face of the push cylinder 5200 contacts the front end face of the second gripping boss 8200.

[0141] The first combined cavity includes 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; the second combined cavity includes the sixth annular gap 5511 and the third annular gap 5411.

[0142] During a surgical excision, the specific working process of this invention is as follows:

[0143] Holding the pusher 5200, the notch 3100 is punctured towards the lesion. The pusher 5200 moves forward relative to the blade tip 1000. At this time, the elastic seal 6000 is in its initial rearward maximum 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, decreases. The air stored in these areas is compressed, and the pressurized air flows towards the unsealed area. As described above, the air can only be discharged outward into the tissue through the micropores 3200 of the exhaust pipe 3000. After the air is discharged, the pressure in the cavity composed of the above-mentioned components decreases. External air pushes the elastic seal 6000 forward through the sixth annular gap 5511 and the third annular gap 5411. The fourth annular gap 5430 appears, and external air continues to flow forward through the fourth annular gap 5430, pushing the elastic seal 6000 to... Figure 5 The device is shown in a forward-flipped state with the valve cylinder boss rounded corner 5333 as the fulcrum. Gas is then backfilled into the first combined cavity via the valve cylinder boss through groove 5332. The pressure in the first combined cavity increases, and the pusher 5200 is pushed backward to its maximum position by the increased pressure gas. Simultaneously, the elastic seal 6000 is pushed backward to its maximum position until the gas pressure in the first combined cavity equals that of the outside. The doctor's puncture process is usually an intermittent, step-by-step puncture method. The interval between each step is also the process of the outside gas backfilling into the combined cavity. This cycle repeats, ensuring that gas is continuously discharged from the micropore 3200 into the tissue throughout the entire puncture process. The exhaust pipe 3000 is not enveloped by tissue, thus avoiding negative pressure on its surface and effectively reducing resistance throughout the puncture process.

[0144] 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 embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

[0145] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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-rotary-cutting device, characterized by, include: Blade tip, cutting tube, exhaust pipe, base structure, pushing structure, first combined cavity, second combined cavity, elastic seal; The blade tip is located at the front end of the biopsy excision device, and the exhaust pipe is coaxially mounted on the tail protrusion of the blade tip. The cutting tube is fitted inside the exhaust pipe and is coaxially fitted with the exhaust pipe, and performs axial cutting motion in the exhaust pipe. The exhaust pipe is assembled inside the base structure. The first combined cavity is located in front of the elastic seal, and the second combined cavity is located behind the elastic seal. The elastic seal is used to control the sealing and opening of the first combined cavity. When the push structure is held and punctured at the lesion site, the first combined cavity is in a sealed state. The push structure moves towards the blade tip, and the volume of the first combined cavity located in front of the elastic seal decreases. The air in the first combined cavity is compressed and pressurized, and the pressurized air is discharged outward from the exhaust pipe into the lesion tissue. When 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. The first combined cavity changes to an open state, and the external air backfills the first combined cavity. The air pressure in the first combined cavity increases, and the increased air pressure pushes the pushing structure in the opposite direction away from the blade tip. At the same time, it pushes the elastic seal backward until the first combined cavity is sealed. The air pressure in the first combined cavity is the same as the external air pressure. The exhaust pipe includes a slot at the head for adsorbing diseased tissue and an exhaust section at the tail. The maximum backward displacement of the cutting tube is such that the front end of the cutting tube is flush with the rear end face of the groove. An annular gap is provided between the cutting pipe and the exhaust pipe. An annular seal is provided at the rear end face of the groove, and the annular seal isolates the groove from the space where the exhaust part is located behind the groove. The exhaust section has several micro-holes evenly distributed around its perimeter; The base structure includes a base and a base extension tube, and the pushing structure includes a push tube cover, a push tube, a valve tube, a valve tube cover, and a push plate; The base is located at the tail of the exhaust pipe, and the base extension tube is coaxially disposed at the tail of the base. The push cylinder is coaxially mounted on the outer ring of the tail of the base extension cylinder, the push cylinder cover is coaxially disposed 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 sleeved on the base extension cylinder and moves axially along the base extension cylinder; The valve cylinder is located behind the base, nested on the outside of the cutting tube, and coaxially arranged with the cutting tube. The valve cylinder cover is coaxially assembled behind the valve cylinder. The push plate is coaxially disposed behind the valve cylinder cover, and the front end face of the push plate is fixed to the rear end face of the valve cylinder cover. The push cylinder cover, the push cylinder, the valve cylinder, the valve cylinder cover, and the push plate are interconnected to form a whole and can be translated together along the axial direction of the cutting tube. The maximum forward translation position is when the front end face of the push plate lug contacts the front end face of the extension cylinder slot of the base extension cylinder, and the maximum backward translation position is when the rear end face of the push cylinder contacts the front end face of the second gripping boss. The first combined cavity includes a second base countersunk hole, a first annular cavity, a valve cylinder countersunk hole, the annular gap, a first annular gap, and a fifth annular gap; The second combined cavity includes a sixth annular gap and a third annular gap.

2. The self-venting biopsy excision device according to claim 1, characterized in that, 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. The first base boss is disposed at the head of the base; The second base boss and the third base boss are coaxially disposed at the tail of the base, with the second base boss located on the outer layer and the third base boss located on the inner layer. The first base countersunk hole is formed between the second base boss and the third base boss; The first base boss and the third base boss are connected, and a second base countersunk hole is formed at the connection between the first base boss and the third base boss; The outer side of the tail of the third base boss is provided with a base groove, and the first seal is assembled in the base groove. The front end face and the rear end face of the base groove axially fix the first seal. The tail end of the exhaust pipe is fitted into the inner hole of the first base boss, the rear end face of the exhaust pipe is flush with the bottom surface of the countersunk hole of the second base, and the connection between the exhaust pipe and the first base boss is sealed.

3. The self-venting biopsy excision device according to claim 2, characterized in that, The valve cylinder is located behind the third base boss, nested on the outside of the cutting tube, and coaxially fitted with the cutting tube. 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 located at the head of the valve cylinder, and the second valve cylinder boss and the third valve cylinder boss are located at the tail of the valve cylinder. The second valve cylinder boss is located on 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 countersunk hole; The head of the first valve cylinder boss is nested in the outer ring of the first seal, and the front end face of the first valve cylinder boss is located at a first preset distance in front of the front end face of the base groove and at a second preset distance from the bottom surface of the first base recess. There is a first annular gap between the third valve cylinder boss and the cutting tube, in which air can flow freely. The third valve cylinder boss has several valve cylinder boss through slots evenly distributed around its circumference, through which air flows. The rear end face of the third valve cylinder boss has valve cylinder boss rounded corners. The first seal seals the inner side of the first valve cylinder boss and the outer side of the third base boss. There is a second annular gap between the first valve cylinder boss and the third base boss. The first valve cylinder boss moves axially relative to the third base boss. A first annular cavity is formed between the first valve cylinder boss and the cutting tube.

4. The self-venting biopsy excision device according to claim 3, characterized in that, The valve cylinder cover includes an 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, allowing air to flow freely within the third annular gap; The cylinder cover boss is disposed on the front end face 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.

5. The self-venting biopsy excision device according to claim 4, characterized in that, There is a gap between the front end face of the valve cylinder cover and the rear end face of the third valve cylinder boss, and the elastic seal is assembled in the gap and is coaxially arranged with the cutting tube; 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 seals with the outer ring of the cutting tube. The axial thickness of the elastic seal is less than the gap between the front end face of the valve cylinder cover and the rear end face of the third valve cylinder boss, and the elastic seal translates axially within the gap. When the elastic seal moves forward until its front end face contacts the rear end face of the third valve cylinder boss, there is a fourth annular gap between the rear end face of the elastic seal and the front end face of the valve cylinder cover, and a fifth annular gap between the outer ring of the elastic seal and the inner ring of the cylinder cover boss, allowing air to flow freely between the fourth annular gap and the fifth annular gap. When the elastic seal moves backward until its rear end face contacts the front end face of the valve cylinder cover, the elastic seal switches to a sealing state.

6. The self-venting biopsy excision device according to claim 5, characterized in that, The push plate is provided with an inner hole and several push plate lugs; 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. The outer ring of the push plate is evenly distributed with a number of push plate lugs, and the front end face of the push plate is fixed to the rear end face of the valve cylinder cover.

7. The self-venting biopsy excision device according to claim 6, characterized in that, The base extension tube is assembled behind the third base boss, and the front end face of the base extension tube is fixed to the rear end face of the third base boss. The base extension tube has several extension tube slots evenly distributed around its tail end. The push plate lug moves horizontally in the extension tube slots and moves forward until the front end face of the push plate lug contacts the front end face of the extension tube slot. The rear end face of the base extension tube is provided with an extension tube countersunk hole, and there is a third preset distance between the bottom surface of the extension tube countersunk hole and the front end face of the extension tube through groove.

8. The self-venting biopsy excision device according to claim 7, characterized in that, The inner side of the head of the push cylinder is evenly distributed with several push cylinder half-grooves, and the push plate ear extends into the push cylinder half-grooves and moves horizontally within the push cylinder half-grooves. The rear end face of the push plate lug is fixed to the rear end face of the half groove of the push cylinder, and the push cylinder is sleeved on the base extension cylinder and moves along the axial direction of the base extension cylinder.

9. The self-venting biopsy excision device according to claim 8, characterized in that, A coaxial gripping tube is fitted behind the base extension tube. The head of the gripping tube is provided with a first gripping boss, and the tail is provided with a second gripping boss. The front end face of the first gripping boss has a gripping annular groove, and the gripping annular groove is nested and fixed to the countersunk hole of the extension tube of the base extension tube; The push cylinder is fitted onto the first gripping boss and moves axially along the first gripping boss until the rear end face of the push cylinder contacts the front end face of the second gripping boss. The sample collector of the biopsy excision device is located behind the holding tube and is used to collect the excised lesion tissue.

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