An easy-to-puncture biopsy excision device

Abstract

This invention relates to the field of biopsy excision technology, providing an easy-to-puncture biopsy excision device. The exhaust pipe and intermediate tube are coaxially fitted, as are the puncture assembly and the exhaust pipe and intermediate tube. The tail protrusion of the puncture assembly is embedded in the head of the intermediate tube, and the cutting tube performs a reciprocating cutting motion along its axis inside the intermediate tube. A base assembly is located at the tail of the exhaust pipe, and an elastic element is located inside the base assembly and coaxial with the exhaust pipe. The front end of the elastic element contacts the base assembly, and the rear end of the elastic element contacts the pushing assembly. When the pushing assembly is held and the puncture assembly is used to puncture the lesion tissue, the pushing assembly moves forward relative to the exhaust pipe. The elastic seal is in a sealed state, and the gas in the inner cavity at the front end of the elastic seal is compressed, increasing the pressure. The gas in the inner cavity is then discharged outwards through the exhaust pipe. This device has the function of applying positive pressure to the tissue during puncture, solving the problem of negative pressure adhesion caused by tissue enveloping the blade.

Description

Technical Field

[0001] This invention relates to the technical field of biopsy excision, and more particularly to a biopsy excision device that is easy to puncture. Background Technology

[0002] Biopsy excision devices are used to remove breast tissue with abnormalities diagnosed by imaging. This type of surgery is usually performed under ultrasound guidance. After making a small incision in the breast skin, the blade of the biopsy device is inserted into the lesion site. The tissue is sucked into the blade groove by the negative pressure provided by the main unit. Then, the internal cutting blade is driven by the power provided by the main unit motor to excisively cut the tissue. The excised tissue is transported to the sample collection container by the negative pressure of the main unit, thus completing the surgical excision.

[0003] The most time-consuming step in the entire procedure is usually the preparation before excision, especially the process of inserting the biopsy tube through the skin to the lesion tissue. Because breast tissue is rich in fat and ligaments, it has a certain degree of elasticity. During the puncture, tissue can easily encapsulate the tube. Furthermore, the biopsy excision device has a relatively large diameter tube, often made of smooth stainless steel. Once the tissue encapsulates the tube to a certain extent, negative pressure will form between the tissue and the outer surface of the tube, causing adhesion between the tissue and the tube. This increases puncture resistance and prolongs the puncture time.

[0004] At the same time, if the doctor encounters resistance during the puncture, in order to continue puncturing forward, the doctor will inevitably increase the puncture force. When the scalpel breaks free from the negative pressure of the tissue, it will suddenly rush into the depth of the tissue. If at this time it is close to the target tissue or the puncture head is near the patient's vital organs, it will cause irreversible damage to the patient. Summary of the Invention

[0005] To address the aforementioned problems, the present invention aims to provide an easy-to-puncture biopsy excision device that applies positive pressure to the tissue during the puncture process. This solves the problem of negative pressure adhesion caused by tissue enveloping the excision tube, greatly reducing the resistance encountered by doctors during the puncture process. It 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.

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

[0007] An easy-to-puncture biopsy excision device includes: an exhaust pipe, an intermediate pipe, a puncture assembly, a cutting pipe, a base assembly, an elastic element, a pushing assembly, and an elastic seal.

[0008] The exhaust pipe is coaxially clearance-fitted with the intermediate pipe, and the exhaust pipe is disposed on the outer layer of the intermediate pipe. The puncture assembly is coaxially fitted with the exhaust pipe and the intermediate pipe. The tail boss of the puncture assembly is embedded in the head of the intermediate pipe. The cutting tube is coaxially assembled with the intermediate pipe, and the cutting tube performs axial reciprocating cutting motion inside the intermediate pipe.

[0009] The base assembly is disposed at the tail end of the exhaust pipe, the elastic element is disposed inside the base assembly and coaxial with the exhaust pipe, the front end of the elastic element is in contact with the base assembly, and the rear end of the elastic element is in contact with the pushing assembly.

[0010] When the push assembly is held and the puncture assembly is used to puncture the diseased tissue, the push assembly moves forward relative to the exhaust pipe, the elastic seal is in a sealed state, the gas in the inner cavity at the front end of the elastic seal is compressed and the pressure increases, and the gas in the inner cavity is discharged outward from the exhaust pipe;

[0011] When the puncture is paused, under the elastic action of the elastic element, the pushing component moves backward relative to the exhaust pipe, and the space of the inner cavity at the front end of the elastic seal increases to form a negative pressure. The elastic seal is in an open state, and the external positive pressure gas flows in from the gap of the elastic seal and backfills into the inner cavity, restoring the pressure of the inner cavity to positive.

[0012] Furthermore, there is a first annular gap between the exhaust pipe and the intermediate pipe, the exhaust pipe and the intermediate pipe are of equal length, and the beginning and end faces of the exhaust pipe and the intermediate pipe coincide.

[0013] A groove is provided at the head position of the exhaust pipe and the intermediate pipe. The groove is used to adsorb the diseased tissue. A first annular seal is provided at the edge of the gap between the exhaust pipe and the intermediate pipe at the groove. The first annular seal is used for sealing and fixing between the exhaust pipe and the intermediate pipe.

[0014] The front end face of the tail boss of the puncture assembly is fixed and sealed to the front end face of the exhaust pipe and the intermediate pipe.

[0015] Furthermore, a second annular seal is provided in the head gap between the exhaust pipe and the intermediate pipe, and a third annular seal is provided in the tail gap between the exhaust pipe and the intermediate pipe. The second annular seal and the third annular seal fix and seal the exhaust pipe and the intermediate pipe.

[0016] The outer wall of the exhaust pipe is evenly distributed with a number of micropores, which are scattered in the area between the second annular seal and the third annular seal. Gas in the environment can freely enter and exit the first annular gap formed by the exhaust pipe and the intermediate pipe through the micropores.

[0017] The cutting tube and the intermediate tube are coaxially assembled, and there is a second annular gap between the cutting tube and the intermediate tube. The cutting tube performs a reciprocating cutting motion along the axis in the second annular gap. A cutting tube seal is provided in the second annular gap, and the cutting tube seal is used to seal the cutting tube and the intermediate tube.

[0018] Furthermore, the base assembly includes a base and a base splicing sleeve, and the push assembly includes a valve sleeve, a sleeve cover, a push plate, a push cylinder, and a push cylinder cover;

[0019] The head of the base splicing sleeve is fixed to the tail of the base;

[0020] The front end of the valve sleeve contacts the tail end of the elastic element, the sleeve cover is coaxially mounted to the rear of the valve sleeve, the push plate is coaxially mounted to the rear of the sleeve cover, the head of the push cylinder contacts the rear end of the push plate, and the front end face of the push cylinder is fixed to the rear end face of the push cylinder cover.

[0021] Furthermore, the base is disposed at the tail end of the exhaust pipe;

[0022] The base has a first base boss and a first base inner hole at its head, and a second base boss at its tail.

[0023] The tail end of the exhaust pipe is embedded in the inner hole of the first base, and the tail end of the exhaust pipe is fixed and sealed to the inner hole of the first base.

[0024] The exhaust pipe is provided with a number of air intake slots evenly distributed around the circumference of the exhaust pipe tail.

[0025] The tail of the first base boss is provided with a base stepped hole, the front end face of the base stepped hole coincides with the front end face of the air inlet groove, and the rear end face of the air inlet groove coincides with the front end face of the third annular seal.

[0026] Furthermore, the tail end of the exhaust pipe is connected to a coaxially arranged air guide sleeve, the head of the air guide sleeve is embedded in the stepped hole of the base, and the outer surface of the head of the air guide sleeve is in contact with the inner wall of the stepped hole of the base.

[0027] The head of the air guide sleeve is provided with a countersunk hole, and the tail end face of the exhaust pipe and the intermediate pipe is fixed and sealed to the countersunk hole end face of the sleeve.

[0028] The inner wall of the countersunk hole of the sleeve is fixed to the outer surface of the tail of the exhaust pipe. The front end face of the air guide sleeve coincides with the rear end face of the air inlet groove. The outer surface of the air guide sleeve is provided with several evenly distributed sleeve through grooves along the circumference, and the gas flows freely through the sleeve through grooves.

[0029] Furthermore, an extension sleeve is fitted over the outer side of the tail end of the air guide sleeve, and the inner surface of the extension sleeve is fixed to the outer surface of the tail end of the air guide sleeve.

[0030] The front end face of the extension sleeve is fixed and sealed to the bottom surface of the countersunk hole of the base. The inner diameter of the extension sleeve is equal to the diameter of the stepped hole of the base. The rear end face of the extension sleeve coincides with the rear end face of the air guide sleeve.

[0031] The outer surface of the tail of the extension sleeve has an annular groove, a fourth annular seal is installed in the annular groove, the outer ring of the extension sleeve is equipped with the elastic element, and the head of the elastic element contacts the bottom surface of the countersunk hole of the base.

[0032] Furthermore, a coaxial valve sleeve is provided behind the extended sleeve. The valve sleeve is nested on the outside of the cutting tube. The tail of the elastic element contacts the front end face of the sleeve head boss of the valve sleeve. The elastic element is compressed by the bottom surface of the base countersunk hole of the contacting head and the front end face of the sleeve head boss of the tail.

[0033] The inner surface of the sleeve head boss contacts the outer ring of the fourth annular seal, the fourth annular seal seals the two surfaces of the contacting outer ring and inner ring, and the sleeve annular groove fixes the fourth annular seal in the axial direction.

[0034] A third annular gap is provided between the inner hole of the valve sleeve and the outer ring of the cutting tube;

[0035] The inner wall of the sleeve head boss of the valve sleeve is evenly distributed with a number of head fins, and the number of head fins is greater than 1.

[0036] The valve sleeve has a plurality of tail fins evenly distributed inside the sleeve tail boss. There is a tail fin gap between the tail fins and the inner wall of the sleeve tail boss. The number of tail fins is a multiple of 2, and they are connected in pairs on the side near the cutting tube to form a tail fin connecting boss. The inner diameter of the tail fin connecting boss is equal to the inner diameter of the hole formed by the head fin. The number of tail fin connecting bosses is twice the number of tail fins.

[0037] There is a fin adjacency gap between every two connected tail fins and the two adjacent tail fins. The number of fin adjacency gaps is equal to the number of connecting bosses of the tail fins. The height of the tail fins gradually decreases from the inside to the outside.

[0038] There is a first preset distance between the front end face of the head fin and the front end face of the sleeve head boss, that is, the length of the head fin is less than that of the sleeve head boss.

[0039] Furthermore, a coaxial sleeve cover is fitted behind the valve sleeve. The sleeve cover has an inner hole, through which the cutting tube passes. A fourth annular gap is provided between the inner hole of the sleeve cover and the cutting tube. The fourth annular gap is smaller than the third annular gap.

[0040] The head of the sleeve cover is provided with a sleeve cover boss, and the inner side of the sleeve cover boss has several evenly distributed sleeve boss slots. The tail of the sleeve cover has a sleeve cover protrusion. The front end face of the sleeve cover protrusion is fixed and sealed to the rear end face of the sleeve tail boss of the valve sleeve. The sleeve cover boss is nested inside the sleeve tail boss of the valve sleeve, and there is a gap between the sleeve cover boss and the tail fin.

[0041] Furthermore, the inner end face of the sleeve cover and the end face of the tail fin connecting boss have an elastic sealing element coaxial with the sleeve cover.

[0042] The elastic seal is provided with an inner hole, the diameter of which is smaller than the outer diameter of the cutting tube, thereby sealing the cutting tube.

[0043] The diameter of the inner hole of the elastic seal is smaller than that of the inner hole of the sleeve cover. The rear end face of the elastic seal is in contact with the inner end face of the sleeve cover. There is a gap between the front end face of the elastic seal and the end face of the tail fin connecting boss.

[0044] The elastic seal moves along the axial direction in the gap of the front end face of the seal, moves forward until the front end face of the elastic seal contacts the end face of the tail fin connecting boss, and moves backward until the rear end face of the elastic seal contacts the inner end face of the sleeve cover.

[0045] The diameter of the end face of the connecting boss of the tail fin is smaller than the diameter of the elastic seal. When the elastic seal moves forward to the maximum position, the elastic seal swings forward around the end face of the connecting boss of the tail fin as the origin. The maximum position of the forward swing is when it is in contact with the outer surface of the tail fin.

[0046] The outer diameter of the elastic seal is smaller than the inner diameter of the sleeve cover boss, and a fifth annular gap is provided between the elastic seal and the sleeve cover boss.

[0047] Furthermore, a coaxial push plate is fitted behind the sleeve cover;

[0048] The pusher plate has an inner hole, the cutting tube passes through the inner hole of the pusher plate, and a sixth annular gap is provided between the inner hole of the pusher plate and the cutting tube, the sixth annular gap being equal to the fourth annular gap;

[0049] The outer ring of the push plate is provided with a number of evenly distributed push plate lugs, and the front end face of the push plate contacts and is fixed to the rear end face of the sleeve cover.

[0050] Furthermore, the head of the base splicing sleeve is fixed to the tail of the base, the inner diameter of the base splicing sleeve is equal to the diameter of the countersunk hole at the tail of the base, and the tail of the base splicing sleeve is provided with several evenly distributed splicing sleeve grooves along the circumference, and the push plate lug of the push plate slides in the splicing sleeve grooves.

[0051] The inner side of the tail of the base splicing sleeve has a countersunk hole for the splicing sleeve, and the depth of the countersunk hole for the splicing sleeve is less than the depth of the groove for the splicing sleeve.

[0052] The tail of the base splicing sleeve is connected to a coaxial gripping sleeve. The front end face of the gripping head boss of the gripping sleeve is provided with a gripping annular step. The gripping annular step is nested in the countersunk hole of the splicing sleeve, and the gripping annular step is fixedly engaged with the countersunk hole of the splicing sleeve.

[0053] The gripping sleeve is provided with a gripping tail protrusion at its tail end, and the gripping tail protrusion is connected to the sample collection device.

[0054] Furthermore, the outer ring of the grip head boss of the grip sleeve is nested with a coaxially fitted push cylinder, the outer diameter of the push cylinder is equal to the outer diameter of the grip tail boss, the head of the push cylinder is provided with a push cylinder countersunk hole, and the rear end face of the push plate ear contacts the bottom surface of the push cylinder countersunk hole.

[0055] The pusher moves axially along the grip sleeve, moving forward until the front end face of the push plate lug contacts the front end face of the splicing sleeve groove of the base splicing sleeve, and moving backward until the rear end face of the pusher contacts the front end face of the tail boss of the grip tail boss.

[0056] The front end face of the push cylinder is fitted with a coaxial push cylinder cover, the push cylinder cover is sleeved on the outside of the base splicing sleeve, and there is a seventh annular gap between the push cylinder cover and the base splicing sleeve.

[0057] The front end face of the pusher is fixed to the rear end face of the pusher cover, and the pusher and the pusher cover move together.

[0058] Compared with the prior art, the present invention has the following beneficial effects:

[0059] By providing an easy-to-puncture biopsy excision device, which delivers the biopsy tube through natural gas flow without introducing other energy sources, the problem of negative pressure adhesion caused by tissue encapsulation of the excision tube is solved. This device is economical and can save costs for biopsy excision devices, thus bringing economic benefits to patients. Attached Figure Description

[0060] Figure 1 This is a schematic diagram of the overall structure of the biopsy excision device for easy puncture of the present invention;

[0061] Figure 2 When the pusher reaches the last end of the biopsy excision device of this invention, which is easy to puncture, Figure 1 A sectional view;

[0062] Figure 3 When the pusher cylinder of the easily puncturable biopsy excision device of the present invention moves to its foremost position... Figure 1 A sectional view;

[0063] Figure 4 For the present invention Figure 2 A magnified view of position B in the middle;

[0064] Figure 5 For the present invention Figure 2 A magnified view of position A in the middle;

[0065] Figure 6 This is a separate schematic diagram of the exhaust pipe tail section of the present invention;

[0066] Figure 7 A cross-sectional view of the groove provided at the head position of the exhaust pipe and the intermediate pipe of the present invention;

[0067] Figure 8 This is a separate schematic diagram of the elastic seal, valve sleeve, and sleeve cap of the present invention;

[0068] Figure 9 This is an independent schematic diagram of the valve sleeve of the present invention;

[0069] Figure 10 For the present invention Figure 3 A magnified view of position C in the middle;

[0070] Figure 11 This is a schematic diagram of the base splicing sleeve of the present invention;

[0071] Figure 12This is an independent front view of the resilient seal and sleeve cap of the present invention;

[0072] Figure 13 This is a separate diagram of the push plate of the present invention.

[0073] Figure Labels

[0074] 1000: Exhaust pipe; 2000: Intermediate pipe; 3000: Puncture assembly; 4000: Cutting pipe; 5000: Base assembly; 6000: Elastic element; 7000: Pushing assembly; 8000: Elastic seal; 9100: Air guide sleeve; 9200: Extension sleeve;

[0075] 1100: First annular gap; 1200: Groove; 1300: First annular seal; 1400: Second annular seal; 1500: Third annular seal; 1600: Micropore; 1700: First annular gap; 1800: Air inlet groove;

[0076] 2100: Second annular space; 2200: Cutting pipe seal;

[0077] 5100: Base; 5200: Base splicing sleeve; 5300: Grip sleeve;

[0078] 5110: First base boss; 5120: Second base boss; 5130: Inner hole of the first base; 5140: Stepped hole of the base; 5150: Countersunk hole of the base;

[0079] 5210: Sleeve groove for splicing sleeve; 5220: Countersunk hole for splicing sleeve;

[0080] 5310: Holding the head protrusion; 5320: Holding the ring-shaped step; 5330: Holding the tail protrusion;

[0081] 5331: Front face of the tail boss;

[0082] 7100: Valve sleeve; 7200: Sleeve cover; 7300: Push plate; 7400: Push cylinder; 7500: Push cylinder cover;

[0083] 7110: Sleeve head boss; 7120: Third annular gap; 7130: Head fin; 7140: Sleeve tail boss; 7150: Tail fin; 7160: Tail fin gap; 7170: Tail fin connecting boss; 7180: Fin adjacent gap.

[0084] 7131: Front end face of the head fin;

[0085] 7210: Inner hole of sleeve cap; 7220: Fourth annular gap; 7230: Boss of sleeve cap; 7240: Protrusion of sleeve cap; 7250: Inner end face of sleeve cap;

[0086] 7231: Sleeve boss groove;

[0087] 7310: Push plate inner hole; 7320: Sixth annular gap; 7330: Push plate lug;

[0088] 7410: Pusher cylinder countersunk hole;

[0089] 7510: Seventh annular gap;

[0090] 8100: Inner hole of the elastic seal; 8200: Gap at the front end face of the seal; 8300: Fifth annular gap;

[0091] 9110: Countersunk hole in sleeve; 9120: Through groove in sleeve;

[0092] 9111: Countersunk end face of sleeve;

[0093] 9121: Annular groove of sleeve; 9122: Fourth annular seal. Detailed Implementation

[0094] 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.

[0095] 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.

[0096] First Embodiment

[0097] like Figure 1-13 As shown, this embodiment provides an easy-to-puncture biopsy excision device, including: an exhaust pipe 1000, an intermediate pipe 2000, a puncture assembly 3000, a cutting pipe 4000, a base assembly 5000, an elastic element 6000, a pushing assembly 7000, and an elastic sealing element 8000.

[0098] The exhaust pipe 1000 is coaxially clearance-fitted with the intermediate pipe 2000, and the exhaust pipe 1000 is disposed on the outer layer of the intermediate pipe 2000. The puncture assembly 3000 is coaxially fitted with the exhaust pipe 1000 and the intermediate pipe 2000. The tail boss of the puncture assembly 3000 is embedded in the head of the intermediate pipe 2000. The cutting pipe 4000 is coaxially assembled with the intermediate pipe 2000, and the cutting pipe 4000 performs a reciprocating cutting motion along the axis inside the intermediate pipe 2000.

[0099] The base assembly 5000 is disposed at the tail end of the exhaust pipe 1000, the elastic member 6000 is disposed inside the base assembly 5000 and coaxial with the exhaust pipe 1000, the front end of the elastic member 6000 is in contact with the base assembly 5000, and the rear end of the elastic member 6000 is in contact with the pushing assembly 7000.

[0100] When the push component 7000 is held and the puncture component 3000 is used to puncture the diseased tissue, the push component 7000 moves forward relative to the exhaust pipe 1000, the elastic seal 8000 is in a sealed state, the gas in the inner cavity at the front end of the elastic seal 8000 is compressed and the pressure increases, and the gas in the inner cavity is discharged outward from the exhaust pipe.

[0101] When the puncture is paused, under the elastic action of the elastic element 6000, the pushing component 7000 moves backward relative to the exhaust pipe 1000, and the space of the inner cavity at the front end of the elastic seal 8000 increases to form a negative pressure. The elastic seal 8000 is in an open state, and the positive pressure gas from the outside flows in from the gap of the elastic seal 8000 and backfills into the inner cavity, restoring the pressure of the inner cavity to positive.

[0102] It should be noted that, in the illustration, the front and back (head and tail) are arranged from left to right, and the fixing method of the structure is not limited to gluing, fusion welding, tight fitting, etc. The specific structure of the present invention will be described in detail below.

[0103] The exhaust pipe 1000 and the intermediate pipe 2000 have a first annular gap 1100. The exhaust pipe 1000 and the intermediate pipe 2000 are of equal length, and the beginning and end faces of the exhaust pipe 1000 and the intermediate pipe 2000 coincide.

[0104] A groove 1200 is provided at the head position of the exhaust pipe 1000 and the intermediate pipe 2000. The groove 1200 is used to adsorb the diseased tissue. A first annular seal 1300 is provided at the edge of the gap between the exhaust pipe 1000 and the intermediate pipe 2000 at the groove 1200. The first annular seal 1300 is used for sealing and fixing between the exhaust pipe 1000 and the intermediate pipe 2000.

[0105] The front end face of the tail boss of the puncture assembly 3000 is fixed and sealed to the front end face of the exhaust pipe 1000 and the intermediate pipe 2000.

[0106] Furthermore, a second annular seal 1400 is provided in the head gap between the exhaust pipe 1000 and the intermediate pipe 2000, and a third annular seal 1500 is provided in the tail gap between the exhaust pipe 1000 and the intermediate pipe 2000. The second annular seal 1400 and the third annular seal 1500 fix and seal the exhaust pipe 1000 and the intermediate pipe 2000.

[0107] The outer wall of the exhaust pipe 1000 is evenly distributed with a number of micropores 1600. The micropores 1600 are scattered in the area between the second annular seal 1400 and the third annular seal 1500. Gas in the environment can freely enter and exit the first annular gap 1700 formed by the exhaust pipe 1000 and the intermediate pipe 2000 through the micropores 1600.

[0108] The cutting tube 4000 and the intermediate tube 2000 are coaxially assembled, and a second annular gap 2100 exists between the cutting tube 4000 and the intermediate tube 2000. The cutting tube 4000 performs a reciprocating cutting motion along its axis in the second annular gap 2100. A cutting tube seal 2200 is provided in the second annular gap 2100, and the cutting tube seal 2200 is used to seal the cutting tube 4000 and the intermediate tube 2000.

[0109] Furthermore, the base assembly 5000 includes a base 5100 and a base splicing sleeve 5200, and the push assembly 7000 includes a valve sleeve 7100, a sleeve cover 7200, a push plate 7300, a push cylinder 7400, and a push cylinder cover 7500.

[0110] The head of the base splicing sleeve 5200 is fixed to the tail of the base 5100;

[0111] The front end of the valve sleeve 7100 contacts the tail end of the elastic element 6000, the sleeve cover 7200 is coaxially mounted behind the valve sleeve 7100, the push plate 7300 is coaxially mounted behind the sleeve cover 7200, the head of the push cylinder 7400 contacts the rear end of the push plate 7300, and the front end face of the push cylinder 7400 is fixed to the rear end face of the push cylinder cover 7500.

[0112] Furthermore, the base 5100 is disposed at the tail end of the exhaust pipe 1000;

[0113] The head of the base 5100 has a first base boss 5110 and a first base inner hole 5130, and the tail of the base 5100 has a second base boss 5120.

[0114] The tail end of the exhaust pipe 1000 is embedded in the inner hole 5130 of the first base, and the tail end of the exhaust pipe 1000 is fixed and sealed to the inner hole 5130 of the first base.

[0115] The exhaust pipe 1000 is provided with a plurality of air intake slots 1800 evenly distributed along the circumference of the exhaust pipe 1000.

[0116] The tail of the first base boss 5100 is provided with a base stepped hole 5140. The front end face of the base stepped hole 5140 coincides with the front end face of the air inlet groove 1800, and the rear end face of the air inlet groove 1800 coincides with the front end face of the third annular seal 1500.

[0117] Furthermore, the tail end of the exhaust pipe 1000 is connected to a coaxially arranged air guide sleeve 9100, the head of the air guide sleeve 9100 is embedded in the stepped hole 5140 of the base, and the outer surface of the head of the air guide sleeve 9100 is in contact with the inner wall of the stepped hole 5140 of the base.

[0118] The head of the air guide sleeve 9100 is provided with a sleeve countersunk hole 9110, and the tail end face of the exhaust pipe 1000 and the intermediate pipe 2000 is fixed and sealed with the sleeve countersunk hole end face 9111 of the sleeve countersunk hole 9110.

[0119] The inner wall of the countersunk hole 9110 of the sleeve is fixed to the outer surface of the tail of the exhaust pipe 1000. The front end face of the air guide sleeve 9100 coincides with the rear end face of the air inlet groove 1800. The outer surface of the air guide sleeve 9100 is provided with a plurality of evenly distributed sleeve through grooves 9120 along the circumference. The number of sleeve through grooves 9120 is greater than 1, and the gas flows freely through the sleeve through grooves 9120.

[0120] Furthermore, an extension sleeve 9200 is sleeved on the outer side of the tail of the air guide sleeve 9100, and the inner surface of the extension sleeve 9200 is fixed to the outer surface of the tail of the air guide sleeve 9100.

[0121] The front end face of the extension sleeve 9200 is fixed and sealed to the bottom surface of the countersunk hole 5150 of the base. The inner diameter of the extension sleeve 9200 is equal to the diameter of the stepped hole 5140 of the base. The rear end face of the extension sleeve 9200 coincides with the rear end face of the air guide sleeve 9100.

[0122] The outer surface of the tail of the extension sleeve 9200 has an annular groove 9121, and a fourth annular seal 9122 is installed in the annular groove 9121. The elastic element 6000 is installed on the outer ring of the extension sleeve 9200, and the head of the elastic element 6000 contacts the bottom surface of the countersunk hole 5150 of the base.

[0123] Furthermore, a coaxial valve sleeve 7100 is provided behind the extension sleeve 9200. The valve sleeve 7100 is nested on the outside of the cutting tube 4000. The tail of the elastic member 6000 contacts the front end face of the sleeve head boss 7110 of the valve sleeve 7100. The elastic member 6000 is compressed by the bottom surface of the base countersunk hole 5150 of the contacting head and the front end face of the sleeve head boss 7110 of the tail.

[0124] The inner surface of the sleeve head boss 7110 contacts the outer ring of the fourth annular seal 9122, and the fourth annular seal 9122 seals the two surfaces of the contacting outer ring and inner ring. The sleeve annular groove 9121 fixes the fourth annular seal 9122 in the axial direction.

[0125] A third annular gap 7120 is provided between the inner hole of the valve sleeve 7100 and the outer ring of the cutting tube 4000;

[0126] The inner wall of the sleeve head boss 7110 of the valve sleeve 7100 is evenly distributed with a number of head fins 7130, and the number of head fins 7130 is greater than 1.

[0127] The valve sleeve 7100 has a plurality of tail fins 7150 evenly distributed inside the sleeve tail boss 7140. A tail fin gap 7160 is provided between the tail fins 7150 and the inner wall of the sleeve tail boss 7140. The number of tail fins 7150 is a multiple of 2, and they are connected in pairs on the side near the cutting tube 4000 to form a tail fin connecting boss 7170. The inner diameter of the tail fin connecting boss 7170 is equal to the inner diameter of the hole formed by the head fin 7130. The number of tail fin connecting bosses 7170 is twice that of the tail fins 7150.

[0128] There is a fin adjacency gap 7180 between every two connected tail fins 7150 and the two adjacent tail fins 7150. The number of fin adjacency gaps 7180 is equal to the number of tail fin connecting bosses 7170. The height of the tail fins 7150 gradually decreases from the inside to the outside.

[0129] There is a first preset distance between the front end face 7131 of the head fin 7130 and the front end face of the sleeve head boss 7110, that is, the length of the head fin 7130 is less than that of the sleeve head boss 7110.

[0130] Furthermore, a coaxial sleeve cover 7200 is fitted behind the valve sleeve 7100. The sleeve cover 7200 has an inner hole 7210. The cutting tube 4000 passes through the inner hole 7210 of the sleeve cover. A fourth annular gap 7220 is provided between the inner hole 7210 of the sleeve cover and the cutting tube 4000. The fourth annular gap 7220 is smaller than the third annular gap 7120.

[0131] The sleeve cover 7200 has a sleeve cover boss 7230 at its head, and the inner side of the sleeve cover boss 7230 has several evenly distributed sleeve boss slots 7231. The sleeve cover 7200 has a sleeve cover protrusion 7240 at its tail. The front end face of the sleeve cover protrusion 7240 is fixed and sealed to the rear end face of the sleeve tail boss 7140 of the valve sleeve 7100. The sleeve cover boss 7230 is nested inside the sleeve tail boss 7140 of the valve sleeve 7100. There is a gap between the sleeve cover boss 7230 and the tail fin 7150.

[0132] Furthermore, the sleeve cover 7200 has an elastic sealing element 8000 coaxial with the sleeve cover 7200 between the inner end face 7250 of the sleeve cover and the end face of the tail fin connecting boss 7170.

[0133] The elastic seal 8000 is provided with an elastic seal inner hole 8100, the diameter of which is smaller than the outer diameter of the cutting tube 4000, thereby sealing the cutting tube 4000.

[0134] The diameter of the inner hole 8100 of the elastic seal is smaller than the inner hole 7210 of the sleeve cover. The rear end face of the elastic seal 8000 is in contact with the inner end face 7250 of the sleeve cover. There is a front end face gap 8200 between the front end face of the elastic seal 8000 and the end face of the tail fin connecting boss 7170.

[0135] The elastic seal 8000 moves along the axial direction in the gap 8200 at the front end face of the seal, moves forward until the front end face of the elastic seal 8000 contacts the end face of the tail fin connecting boss 7170, and moves backward until the rear end face of the elastic seal 8000 contacts the inner end face 7250 of the sleeve cover.

[0136] The diameter of the end face of the tail fin connecting boss 7170 is smaller than the diameter of the elastic seal 8000. When the elastic seal 8000 moves forward to the maximum position, the elastic seal 8000 swings forward around the end face of the tail fin connecting boss 7170 as the origin. The maximum position of the forward swing is when it is in contact with the outer surface of the tail fin 7150.

[0137] The outer diameter of the elastic seal 8000 is smaller than the inner diameter of the sleeve cover boss 7230, and a fifth annular gap 8300 is provided between the elastic seal 8000 and the sleeve cover boss 7230.

[0138] Furthermore, a coaxial push plate 7300 is fitted behind the sleeve cover 7200;

[0139] The push plate 7300 has a push plate inner hole 7310, the cutting tube 4000 passes through the push plate inner hole 7310, and a sixth annular gap 7320 is provided between the push plate inner hole 7310 and the cutting tube 4000, the sixth annular gap 7320 being equal to the fourth annular gap 7220;

[0140] The outer ring of the push plate 7300 is provided with a plurality of evenly distributed push plate lugs 7330, and the front end face of the push plate 7300 contacts and is fixed to the rear end face of the sleeve cover 7200.

[0141] Furthermore, the head of the base splicing sleeve 5200 is fixed to the tail of the base 5100, the inner diameter of the base splicing sleeve 5200 is equal to the diameter of the base countersunk hole 5150 at the tail of the base 5100, and the tail of the base splicing sleeve 5200 is provided with a plurality of evenly distributed splicing sleeve grooves 5210 along the circumferential direction, and the push plate lug 7330 of the push plate 7300 slides in the splicing sleeve grooves 5210;

[0142] The base splicing sleeve 5200 has a splicing sleeve countersunk hole 5220 on the inner side of its tail, and the depth of the splicing sleeve countersunk hole 5220 is less than the depth of the splicing sleeve groove 5210.

[0143] The tail of the base splicing sleeve 5200 is connected to a coaxial gripping sleeve 5300. The front end face of the gripping head boss 5310 of the gripping sleeve 5300 is provided with a gripping annular step 5320. The gripping annular step 5320 is nested in the countersunk hole 5220 of the splicing sleeve, and the gripping annular step 5320 is fixedly engaged with the countersunk hole 5220 of the splicing sleeve.

[0144] The gripping sleeve 5300 is provided with a gripping tail protrusion 5330 at its tail end. The gripping tail protrusion 5330 is connected to the sample collection device (connected behind the gripping tail protrusion 5330, not shown in the figure).

[0145] Furthermore, the outer ring of the grip head boss 5310 of the grip sleeve 5300 is nested with a coaxially fitted push cylinder 7400. The outer diameter of the push cylinder 7400 is equal to the outer diameter of the grip tail boss 5330. The head of the push cylinder 7400 is provided with a push cylinder countersunk hole 7410, and the rear end face of the push plate ear 7330 contacts the bottom surface of the push cylinder countersunk hole 7410.

[0146] The pusher 7400 moves axially along the gripping sleeve 5300, moving forward until the front end face of the push plate lug 7330 contacts the front end face of the splicing sleeve groove 5210 of the base splicing sleeve 5200. Figure 3 (as shown in the image) moves backward until the rear end face of the push cylinder 7400 contacts the front end face 5331 of the tail boss of the gripping tail boss 5330. Figure 2 (as shown in the image);

[0147] The front end face of the push cylinder 7400 is fitted with the push cylinder cover 7500, which is coaxially fitted. The push cylinder cover 7500 is sleeved on the outside of the base splicing sleeve 5200. There is a seventh annular gap 7510 between the push cylinder cover 7500 and the base splicing sleeve 5200.

[0148] The front end face of the push cylinder 7400 is fixed to the rear end face of the push cylinder cover 7500, and the push cylinder 7400 and the push cylinder cover 7500 move together.

[0149] The overall working process of the easy-to-puncture biopsy excision device of the present invention is as follows:

[0150] Since the elastic element 6000 is always in a compressed state, the elastic force is transmitted sequentially through the valve sleeve 7100, sleeve cover 7200, and push plate 7300 to the push cylinder 7400. The push cylinder 7400 is in its maximum rearward position when no external force is applied. During surgery, the doctor holds the push cylinder 7400 and inserts the slot 1200 into the lesion. The push cylinder 7400 moves forward, and the gas in the valve sleeve 7100 is compressed, increasing in pressure and beginning to flow out in the unsealed direction. As described above, the gas can only be discharged through the micropores 1600 of the exhaust pipe 1000. Because the doctor's puncture process involves intermittent, segmented punctures to the lesion site, during the pauses in puncture, the elastic element 6000 pushes the pusher 7400 backward, increasing the internal space of the valve sleeve 7100 and creating negative pressure. Simultaneously, as the valve sleeve 7100 moves backward, the elastic seal 8000 contacts the cutting tube 4000 at its inner hole, hindering its movement to its maximum forward position. Consequently, external positive pressure gas flows in from the gap between the rear end face of the elastic seal 8000 and the inner end face 7250 of the sleeve cap, sequentially passing through the fifth annular gap 8300 and the sleeve boss groove 7231, refilling the internal cavity of the valve sleeve 7100 and restoring its internal pressure to positive. This cycle repeats, ensuring that gas is continuously discharged into the tissue through the micropore 1600 throughout the entire puncture process. The exhaust pipe 1000 is not enveloped by tissue, preventing the formation of negative pressure on its surface and effectively reducing resistance throughout the puncture process.

[0151] 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.

[0152] 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 biopsy excision device that is easy to puncture, characterized in that, include: Exhaust pipe, intermediate pipe, puncture assembly, cutting pipe, base assembly, elastic element, push assembly, elastic seal; The exhaust pipe is coaxially clearance-fitted with the intermediate pipe, and the exhaust pipe is disposed on the outer layer of the intermediate pipe. The puncture assembly is coaxially fitted with the exhaust pipe and the intermediate pipe. The tail boss of the puncture assembly is embedded in the head of the intermediate pipe. The cutting tube is coaxially assembled with the intermediate pipe, and the cutting tube performs axial reciprocating cutting motion inside the intermediate pipe. The base assembly is disposed at the tail end of the exhaust pipe, the elastic element is disposed inside the base assembly and coaxial with the exhaust pipe, the front end of the elastic element is in contact with the base assembly, and the rear end of the elastic element is in contact with the pushing assembly. When the push assembly is held and the puncture assembly is used to puncture the diseased tissue, the push assembly moves forward relative to the exhaust pipe, the elastic seal is in a sealed state, the gas in the inner cavity at the front end of the elastic seal is compressed and the pressure increases, and the gas in the inner cavity is discharged outward from the exhaust pipe; When the puncture is paused, under the elastic action of the elastic element, the pushing component moves backward relative to the exhaust pipe, and the space of the inner cavity at the front end of the elastic seal increases to form a negative pressure. The elastic seal is in an open state, and the external positive pressure gas flows in from the gap of the elastic seal and backfills into the inner cavity, restoring the pressure of the inner cavity to positive. The actuation assembly includes a valve sleeve, a sleeve cover, a push plate, a push cylinder, and a push cylinder cover; The valve sleeve has several tail fins evenly distributed inside the sleeve tail boss, and the two fins are connected in pairs on the side near the cutting tube to form a tail fin connecting boss. The valve sleeve is fitted with a coaxial sleeve cover at the rear, and the sleeve cover has an inner hole. The sleeve cover has an elastic sealing element that is coaxial with the sleeve cover between the inner end face of the sleeve cover and the end face of the tail fin connecting boss. The elastic seal is provided with an inner hole, the diameter of which is smaller than the outer diameter of the cutting tube, thereby sealing the cutting tube. The diameter of the inner hole of the elastic seal is smaller than that of the inner hole of the sleeve cover. The rear end face of the elastic seal is in contact with the inner end face of the sleeve cover. There is a gap between the front end face of the elastic seal and the end face of the tail fin connecting boss. The elastic seal moves along the axial direction in the gap of the front end face of the seal, moves forward until the front end face of the elastic seal contacts the end face of the tail fin connecting boss, and moves backward until the rear end face of the elastic seal contacts the inner end face of the sleeve cover. The diameter of the end face of the connecting boss of the tail fin is smaller than the diameter of the elastic seal. When the elastic seal moves forward to the maximum position, the elastic seal swings forward around the end face of the connecting boss of the tail fin as the origin. The maximum position of the forward swing is when it is in contact with the outer surface of the tail fin. The outer diameter of the elastic seal is smaller than the inner diameter of the sleeve cover boss, and a fifth annular gap is provided between the elastic seal and the sleeve cover boss.

2. The easily puncturable biopsy excision device according to claim 1, characterized in that, Also includes: The exhaust pipe and the intermediate pipe have a first annular gap, the exhaust pipe and the intermediate pipe are of equal length, and the beginning and end faces of the exhaust pipe and the intermediate pipe overlap. A groove is provided at the head position of the exhaust pipe and the intermediate pipe. The groove is used to adsorb the diseased tissue. A first annular seal is provided at the edge of the gap between the exhaust pipe and the intermediate pipe at the groove. The first annular seal is used for sealing and fixing between the exhaust pipe and the intermediate pipe. The front end face of the tail boss of the puncture assembly is fixed and sealed to the front end face of the exhaust pipe and the intermediate pipe.

3. The easy-to-puncture biopsy excision device according to claim 2, characterized in that, Also includes: A second annular seal is provided in the head gap between the exhaust pipe and the intermediate pipe, and a third annular seal is provided in the tail gap between the exhaust pipe and the intermediate pipe. The second annular seal and the third annular seal fix and seal the exhaust pipe and the intermediate pipe. The outer wall of the exhaust pipe is evenly distributed with a number of micropores, which are scattered in the area between the second annular seal and the third annular seal. Gas in the environment can freely enter and exit the first annular gap formed by the exhaust pipe and the intermediate pipe through the micropores. The cutting tube and the intermediate tube are coaxially assembled, and there is a second annular gap between the cutting tube and the intermediate tube. The cutting tube performs a reciprocating cutting motion along the axis in the second annular gap. A cutting tube seal is provided in the second annular gap, and the cutting tube seal is used to seal the cutting tube and the intermediate tube.

4. The easy-to-puncture biopsy excision device according to claim 3, characterized in that, The base assembly includes a base and a base splicing sleeve; The head of the base splicing sleeve is fixed to the tail of the base; The front end of the valve sleeve contacts the tail end of the elastic element, the sleeve cover is coaxially mounted to the rear of the valve sleeve, the push plate is coaxially mounted to the rear of the sleeve cover, the head of the push cylinder contacts the rear end of the push plate, and the front end face of the push cylinder is fixed to the rear end face of the push cylinder cover.

5. The easy-to-puncture biopsy excision device according to claim 4, characterized in that, The base is located at the tail end of the exhaust pipe; The base has a first base boss and a first base inner hole at its head, and a second base boss at its tail. The tail end of the exhaust pipe is embedded in the inner hole of the first base, and the tail end of the exhaust pipe is fixed and sealed to the inner hole of the first base. The exhaust pipe is provided with a number of air intake slots evenly distributed around the circumference of the exhaust pipe tail. The tail of the first base boss is provided with a base stepped hole, the front end face of the base stepped hole coincides with the front end face of the air inlet groove, and the rear end face of the air inlet groove coincides with the front end face of the third annular seal.

6. The easy-to-puncture biopsy excision device according to claim 5, characterized in that, The exhaust pipe is connected to a coaxially arranged air guide sleeve at its tail end. The head of the air guide sleeve is embedded in the stepped hole of the base, and the outer surface of the head of the air guide sleeve is in contact with the inner wall of the stepped hole of the base. The head of the air guide sleeve is provided with a countersunk hole, and the tail end face of the exhaust pipe and the intermediate pipe is fixed and sealed to the countersunk hole end face of the sleeve. The inner wall of the countersunk hole of the sleeve is fixed to the outer surface of the tail of the exhaust pipe. The front end face of the air guide sleeve coincides with the rear end face of the air inlet groove. The outer surface of the air guide sleeve is provided with several evenly distributed sleeve through grooves along the circumference, and the gas flows freely through the sleeve through grooves.

7. The easy-to-puncture biopsy excision device according to claim 6, characterized in that, An extension sleeve is fitted over the outer side of the tail end of the air guide sleeve, and the inner surface of the extension sleeve is fixed to the outer surface of the tail end of the air guide sleeve. The front end face of the extension sleeve is fixed and sealed to the bottom surface of the countersunk hole of the base. The inner diameter of the extension sleeve is equal to the diameter of the stepped hole of the base. The rear end face of the extension sleeve coincides with the rear end face of the air guide sleeve. The outer surface of the tail of the extension sleeve has an annular groove, a fourth annular seal is installed in the annular groove, the outer ring of the extension sleeve is equipped with the elastic element, and the head of the elastic element contacts the bottom surface of the countersunk hole of the base.

8. The easy-to-puncture biopsy excision device according to claim 7, characterized in that, A coaxial valve sleeve is provided behind the extended sleeve. The valve sleeve is nested on the outside of the cutting tube. The tail of the elastic element contacts the front end face of the sleeve head boss of the valve sleeve. The elastic element is compressed by the bottom surface of the base countersunk hole of the contacting head and the front end face of the sleeve head boss of the tail. The inner surface of the sleeve head boss contacts the outer ring of the fourth annular seal, the fourth annular seal seals the two surfaces of the contacting outer ring and inner ring, and the sleeve annular groove fixes the fourth annular seal in the axial direction. A third annular gap is provided between the inner hole of the valve sleeve and the outer ring of the cutting tube; The inner wall of the sleeve head boss of the valve sleeve is evenly distributed with a number of head fins, and the number of head fins is greater than 1. A tail fin gap is provided between the tail fin and the inner wall of the tail boss of the sleeve. The number of tail fins is a multiple of 2. The inner diameter of the tail fin connecting boss is equal to the inner diameter of the hole formed by the head fin. The number of tail fin connecting bosses is twice that of the tail fin. There is a fin adjacency gap between every two connected tail fins and the two adjacent tail fins. The number of fin adjacency gaps is equal to the number of connecting bosses of the tail fins. The height of the tail fins gradually decreases from the inside to the outside. There is a first preset distance between the front end face of the head fin and the front end face of the sleeve head boss, that is, the length of the head fin is less than that of the sleeve head boss.

9. The easy-to-puncture biopsy excision device according to claim 8, characterized in that, The cutting tube passes through the inner hole of the sleeve cover, and a fourth annular gap is provided between the inner hole of the sleeve cover and the cutting tube, the fourth annular gap being smaller than the third annular gap; The head of the sleeve cover is provided with a sleeve cover boss, and the inner side of the sleeve cover boss has a plurality of evenly distributed sleeve boss slots. The tail of the sleeve cover has a sleeve cover protrusion. The front end face of the sleeve cover protrusion is fixed and sealed to the rear end face of the sleeve tail boss of the valve sleeve. The sleeve cover boss is nested inside the sleeve tail boss of the valve sleeve, and there is a gap between the sleeve cover boss and the tail fin.

10. The easy-to-puncture biopsy excision device according to claim 9, characterized in that, A coaxial push plate is fitted behind the sleeve cover; The pusher plate has an inner hole, the cutting tube passes through the inner hole of the pusher plate, and a sixth annular gap is provided between the inner hole of the pusher plate and the cutting tube, the sixth annular gap being equal to the fourth annular gap; The outer ring of the push plate is provided with a number of evenly distributed push plate lugs, and the front end face of the push plate contacts and is fixed to the rear end face of the sleeve cover.

11. The easily puncturable biopsy excision device according to claim 10, characterized in that, The head of the base splicing sleeve is fixed to the tail of the base. The inner diameter of the base splicing sleeve is equal to the diameter of the countersunk hole at the tail of the base. The tail of the base splicing sleeve has several evenly distributed splicing sleeve grooves along the circumferential direction. The push plate lug of the push plate slides in the splicing sleeve grooves. The inner side of the tail of the base splicing sleeve has a countersunk hole for the splicing sleeve, and the depth of the countersunk hole for the splicing sleeve is less than the depth of the groove for the splicing sleeve. The tail of the base splicing sleeve is connected to a coaxial gripping sleeve. The front end face of the gripping head boss of the gripping sleeve is provided with a gripping annular step. The gripping annular step is nested in the countersunk hole of the splicing sleeve, and the gripping annular step is fixedly engaged with the countersunk hole of the splicing sleeve. The gripping sleeve is provided with a gripping tail protrusion at its tail end, and the gripping tail protrusion is connected to the sample collection device.

12. The easily puncturable biopsy excision device according to claim 11, characterized in that, The outer ring of the grip head boss of the grip sleeve is nested with a coaxially fitted push cylinder. The outer diameter of the push cylinder is equal to the outer diameter of the grip tail boss. The head of the push cylinder is provided with a push cylinder countersunk hole. The rear end face of the push plate lug contacts the bottom surface of the push cylinder countersunk hole. The pusher moves axially along the grip sleeve, moving forward until the front end face of the push plate lug contacts the front end face of the splicing sleeve groove of the base splicing sleeve, and moving backward until the rear end face of the pusher contacts the front end face of the tail boss of the grip tail boss. The front end face of the push cylinder is fitted with a coaxial push cylinder cover, the push cylinder cover is sleeved on the outside of the base splicing sleeve, and there is a seventh annular gap between the push cylinder cover and the base splicing sleeve. The front end face of the pusher is fixed to the rear end face of the pusher cover, and the pusher and the pusher cover move together.

Images