CN109330633B - Biopsy rotary cutting device - Google Patents
Biopsy rotary cutting device Download PDFInfo
- Publication number
- CN109330633B CN109330633B CN201811336369.4A CN201811336369A CN109330633B CN 109330633 B CN109330633 B CN 109330633B CN 201811336369 A CN201811336369 A CN 201811336369A CN 109330633 B CN109330633 B CN 109330633B
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- Prior art keywords
- tube
- cutter tube
- inner cutter
- cavity
- cutting edge
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
- A61B10/02—Instruments for taking cell samples or for biopsy
- A61B10/0233—Pointed or sharp biopsy instruments
- A61B10/0266—Pointed or sharp biopsy instruments means for severing sample
- A61B10/0275—Pointed or sharp biopsy instruments means for severing sample with sample notch, e.g. on the side of inner stylet
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
- A61B10/02—Instruments for taking cell samples or for biopsy
- A61B10/0233—Pointed or sharp biopsy instruments
- A61B10/0283—Pointed or sharp biopsy instruments with vacuum aspiration, e.g. caused by retractable plunger or by connected syringe
Abstract
The utility model provides a biopsy rotary cutting device, which comprises a dynamic sealing structure arranged on the outer side of an inner cutter tube; the dynamic sealing structure is characterized in that a cavity is formed outside the inner cutter tube, a sealing ring is arranged in the dynamic sealing structure, the cavity comprises a first cavity and a second cavity, an auxiliary tube is arranged outside the inner cutter tube, and a circulation structure is arranged on the auxiliary tube; when the inner cutter tube moves to a first position along the axial direction of the inner cutter tube, the sealing ring is positioned at the outer side of the auxiliary tube, and the first cavity is communicated with the second cavity through the circulation structure; when the inner cutter tube moves to a second position along the axial direction of the inner cutter tube, the sealing ring is positioned at the outer side of the inner cutter tube, and the sealing ring cuts off the first cavity and the second cavity. The utility model can introduce the atmosphere to form circulating air flow with better suction strength; the circulating air flow can more efficiently convey the rotary-cut tissues at the corresponding positions to the sample collector at the rear end, and the sample outlet rate is effectively improved.
Description
Technical Field
The utility model relates to the field of medical instruments, in particular to a biopsy rotary cutting device.
Background
The biopsy rotary cutting device is widely used in minimally invasive surgery puncture operation, firstly, the puncture tool bit can ensure that the operation wound is small, no needle is needed, the biopsy rotary cutting device can meet the requirements of diagnosis and treatment, and can ensure the appearance beauty, in particular to the advantages of small wound surface, healing, small left knife scar, small damage, quick recovery and the like of some breasts or faces, so that the biopsy rotary cutting device is more popular with most women. Vacuum infusion assisted breast sample biopsy and rotary cutting are one of the most effective modes currently used for breast biopsy operation, and repeated cutting is required to be carried out on a suspicious lesion of a breast so as to obtain a histological specimen of enough breast, thereby facilitating early detection and diagnosis of breast cancer and simultaneously carrying out minimally invasive excision of benign tumors of the breast.
The head of the rotary cutting device adopts a small-diameter puncture head for puncture, and the tail of the puncture head is coaxially fixed with the head of the outer cutter. The outer cutter tube is sleeved outside the coaxially assembled inner cutter tube. The outer knife tube head is provided with a knife slot, the inner knife tube head is positioned at the most distal end before the puncture is finished, the knife slot is opened after the inner knife tube rotates to retreat after the puncture is finished, and meanwhile, the negative pressure system sucks tumor tissues into the knife slot. The head of the inner cutter tube is provided with an inner chamfer cutting edge, the inner cutter tube rotates to advance after tissue adsorption is completed, rotary cutting is carried out on the tissue, and the resected tissue is sucked into a sample collection container at the tail part of the rotary cutting device by continuous negative pressure through the inner cavity of the inner cutter tube.
The atherectomy device aspirates the severed tumor tissue primarily through a negative pressure system or may be understood as utilizing the pressure differential between the knife channel and the system to transport the tissue to the sample collection container. However, when the adsorption excision work is finished once, the pressure around the cutter groove is equal to the pressure in the inner cutter tube, the whole cutter set is in an isobaric state, and the adsorbed excision tissue is not easy to flow out from the cutter groove to the sample collector, so that the problem of poor sample output effect is caused.
Disclosure of Invention
The utility model provides a biopsy rotary cutting device, which solves the problem of poor sample-out effect.
According to a first aspect of the utility model, there is provided a biopsy rotary cutting device, comprising an inner cutter tube and an outer cutter tube which are coaxially arranged, wherein the inner cutter tube is positioned on the inner side of the outer cutter tube, the head end of the outer cutter tube is provided with a puncture head, and one end of the inner cutter tube far away from the puncture head is directly or indirectly connected with a sample collector; the device also comprises a dynamic sealing structure arranged on the outer side of the inner cutter tube;
the dynamic sealing structure is provided with a cavity outside the inner cutter tube, a sealing ring is arranged in the dynamic sealing structure, the cavity comprises a first cavity body positioned at one side of the sealing ring, which is close to the puncture head, and a second cavity body positioned at one side of the sealing ring, which is far away from the puncture head, and the first cavity body is communicated with an inter-tube gap between the outer wall of the inner cutter tube and the inner wall of the outer cutter tube; one end of the inter-tube gap, which is close to the puncture head, is communicated with the inner side space of the inner cutter tube; an auxiliary pipe is arranged on the outer side of the inner cutter pipe, and a circulation structure is arranged on the auxiliary pipe;
when the inner cutter tube moves to a first position along the axial direction of the inner cutter tube, the sealing ring is positioned at the outer side of the auxiliary tube, and the first cavity is communicated with the second cavity through the circulation structure;
when the inner cutter tube moves to a second position along the axial direction of the inner cutter tube, the sealing ring is positioned at the outer side of the inner cutter tube, and the sealing ring is in sealing contact with the inner cutter tube so as to separate the first cavity from the second cavity.
Optionally, the circulation structure is a groove structure or a slit structure which is axially arranged along the inner knife tube and is arranged on the outer surface of the auxiliary tube.
Optionally, the circulation structure is a seam structure, the auxiliary tube is further formed with a circulation cavity outside the inner cutter tube, and the circulation cavity is communicated with the inner side of the seam structure.
Optionally, the auxiliary tube includes an annular middle portion and annular end portions located at both ends of the annular middle portion in an axial direction of the inner cutter tube, and an outer diameter of the annular middle portion is larger than an outer diameter of the annular end portions.
Optionally, a cutting edge structure is arranged at one end of the inner cutter tube, which is close to the puncture head, a cutter groove is arranged at the pipe wall part of the outer cutter tube, which is close to the puncture head, and one end of the inner cutter tube, which is far away from the puncture head, is directly or indirectly connected with a sample collector;
when the inner cutter tube moves to the first position along the axial direction of the inner cutter tube, the cutting edge structure is positioned in the cutter groove; when the inner cutter tube moves to the second position along the axial direction of the inner cutter tube, the cutting edge structure is not positioned at the inner side of the cutter groove.
Optionally, the device further comprises a ventilation slit axially arranged along the inner cutter tube, wherein the ventilation slit is arranged on the cutting edge structure, or the cutting edge structure is communicated with the inner cutter tube, the ventilation slit is communicated with an inner space of the cutting edge structure and a gap between the inner cutter tube, and the inner space of the cutting edge structure is communicated with an inner space of the inner cutter tube.
Optionally, the number of the ventilation slits is multiple, and the ventilation slits are uniformly distributed around the axial direction of the inner knife tube.
Optionally, the blade structure includes annular blade connecting portion and cutting tip portion, cutting tip portion locates the blade connecting portion be close to the one end of puncture head, the blade connecting portion keep away from the one end of puncture head is connected the one end of inner knife pipe be close to the puncture head.
Optionally, the diameter of the cutting edge connecting part is larger than the outer diameter of the inner cutter tube and smaller than the inner diameter of the outer cutter tube; the diameter of the end of the blade tip, which is close to the puncture head, is larger than the inner diameter of the outer cutter tube.
Optionally, the dynamic seal structure includes seal base and seal sleeve, seal base fixed connection in outside the outer sword pipe, seal sleeve with seal base fixed connection, seal sleeve with seal base is followed the axial of interior sword pipe has the installation gap, the sealing washer install in the installation gap, seal sleeve is located the interior sword outside of pipe, first cavity is located seal base, the second cavity is located in the seal sleeve.
The biopsy rotary cutting device provided by the utility model can break an isobaric state by introducing the atmosphere from the outside to ensure that tissues can be sucked out efficiently aiming at the situation that the sample outlet effect is poor, wherein the biopsy rotary cutting device provides a first cavity capable of being communicated with a gap between inner and outer pipes and a second cavity capable of being communicated with the outside atmosphere through a dynamic sealing structure and a sealing ring in the dynamic sealing structure; when the inner cutter tube moves to the first position, the first cavity and the second cavity are communicated with the circulating structure of the auxiliary tube, air can be introduced into the inner cutter tube to form circulating air flow with better suction strength, the circulating air flow sequentially passes through the second cavity, the circulating structure, the first cavity and the inter-tube gap, and enters the inner cutter tube through one end of the inter-tube gap, which is close to the puncture head, and the circulating air flow can more efficiently convey the tissue which is cut by the inner side of the cutter tube to the sample collector at the rear end in a rotating way.
Meanwhile, the first cavity and the second cavity are distributed along the axial direction of the inner cutter pipe, the circulation structure is also arranged between the first cavity and the second cavity along the axial direction of the inner cutter pipe, the generated gas flows are also along the axial direction, the conditions of bending and the like are avoided, the consistency of the flow directions is maintained, the increase of the gas flow stroke is avoided, the tissue conveying efficiency is further improved, and the sample yield is improved.
The communication and the separation of the first cavity and the second cavity are brought by the movement of the inner cutter pipe, and other manual or mechanical control is not needed to be introduced in the process, so that on one hand, the timeliness of the communication and the separation can be ensured, and on the other hand, the adverse influence of the communication and the separation on the movement of the inner cutter pipe, such as resistance, can be reduced.
In addition, because the utility model does not need to introduce other manual or mechanical control, the utility model can also avoid other control to increase the abrasion degree of the structure, namely the utility model can be beneficial to reducing abrasion, slowing down aging speed and prolonging service life, thereby being beneficial to reducing maintenance cost.
Meanwhile, as other mechanical structures such as a reset part and a driving part are not required to be introduced, the utility model can also effectively ensure the tightness between the dynamic sealing structure and the cutter tube, thereby meeting the requirement of high-speed movement in the rotary cutting process (the rotating speed of the rotary cutter is very fast, r=300 rpm can be reached per second).
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a schematic view showing a state of a biopsy rotational atherectomy device according to an embodiment of the present utility model;
FIG. 2 is a second schematic view of a rotational atherectomy device according to an embodiment of the utility model;
FIG. 3 is a schematic view showing a state of a biopsy rotational atherectomy device according to another embodiment of the present utility model;
FIG. 4 is an enlarged partial schematic view of area A of FIG. 3;
FIG. 5 is a partially enlarged schematic illustration of region B of FIG. 4;
FIG. 6 is an enlarged partial schematic view of region C of FIG. 5;
FIG. 7 is a second schematic view of a rotational atherectomy device according to another embodiment of the utility model;
FIG. 8 is a partially enlarged schematic illustration of region D of FIG. 7;
figure 9 is a schematic illustration of the distribution of ventilation slits in an embodiment of the present utility model;
FIG. 10 is a schematic view of the structure of an auxiliary pipe according to an embodiment of the present utility model;
FIG. 11 is a schematic view of section A-A of FIG. 10;
FIG. 12 is a schematic view of section B-B of FIG. 10;
FIG. 13 is a schematic view showing the structure of an auxiliary pipe according to another embodiment of the present utility model;
FIG. 14 is a schematic view of section C-C of FIG. 13;
fig. 15 is a schematic view of section D-D of fig. 13.
Reference numerals illustrate:
1-a puncture head;
2-an outer cutter tube;
21-knife slot;
3-an inner cutter tube;
31-a cutting edge structure;
311-edge connection;
312-blade tip
313-terminus;
314-outer inclined plane;
315-inner inclined plane;
32-ventilation slits;
321-a main slit portion;
322-rounded ends;
4-a dynamic sealing structure;
41-a first cavity;
42-a second cavity;
43-sealing ring;
44-sealing the base;
45-sealing the sleeve;
451-a barrel connection;
452-sleeve body;
5-inter-tube gaps;
6-an auxiliary tube;
61-an annular middle portion;
62-annular end;
63-a flow-through chamber;
7-flow-through structure;
8-a seat rear sleeve;
a 9-dial structure;
91-a dial body;
92-dial base.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The terms "first," "second," "third," "fourth" and the like in the description and in the claims and in the above drawings, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The technical scheme of the utility model is described in detail below by specific examples. The following embodiments may be combined with each other, and some embodiments may not be repeated for the same or similar concepts or processes.
FIG. 1 is a schematic view showing a state of a biopsy rotational atherectomy device according to an embodiment of the present utility model; fig. 2 is a second schematic view of a biopsy rotational atherectomy device according to an embodiment of the utility model.
Referring to fig. 1 and 2, the biopsy rotary cutting device comprises an inner cutter tube 3 and an outer cutter tube 2 which are coaxially arranged, wherein the inner cutter tube 3 is positioned on the inner side of the outer cutter tube 2, a puncture head 1 is arranged at the head end of the outer cutter tube 2, one end, far away from the puncture head 1, of the inner cutter tube 3 is directly or indirectly connected with a sample collector, and the direct or indirect connection can be understood to be capable of transmitting tissues in the inner cutter tube 3 to the sample collector.
The pipe wall part of the outer cutter pipe 2, which is close to the puncture head 1, is provided with a cutter groove 21, and correspondingly, one end of the inner cutter pipe 3, which is close to the puncture head, is provided with a cutting edge structure 31, the cutter groove 21 is used for adsorbing tumor tissues into the outer cutter pipe 2, furthermore, the tissues sucked into the cutter groove 21 can be cut off by the cutting edge structure 31, the cut tissues are equivalent due to the internal and external pressure of the cutter groove 21, and are not easy to move, and one end of the inner cutter pipe 3, which is far away from the puncture head 1, is directly or indirectly connected with a sample collector. The sample collector may be configured with an external negative pressure system. In some schemes, the internal and external pressure difference can be changed by increasing the intensity of the negative pressure system.
At the same time, the inter-tube gap formed between the outer surface of the inner cutter tube 3 and the inner surface of the outer cutter tube 2 needs to be large enough, which is understood to enable the gas to flow therein without blocking.
In this embodiment, the device further includes a dynamic sealing structure 4 disposed outside the inner cutter tube 3.
The dynamic sealing structure 4 is provided with a cavity outside the inner cutter tube 3, a sealing ring 43 is arranged in the dynamic sealing structure 4, the cavity comprises a first cavity 41 positioned at one side of the sealing ring 43 close to the puncture head 1 and a second cavity 42 positioned at one side of the sealing ring 43 far away from the puncture head 1, and the first cavity 41 is communicated with an inter-tube gap 5 between the outer wall of the inner cutter tube 3 and the inner wall of the outer cutter tube 2; one end of the inter-tube gap 5, which is close to the puncture head 1, is communicated with the inner space of the inner cutter tube 3; an auxiliary pipe 6 is arranged on the outer side of the inner cutter pipe 3, and the auxiliary pipe 6 is provided with a circulation structure 7.
The end of the inter-tube gap 5 near the puncture head 1 is also understood to be the end near the knife channel 21, and the air flow generated by this end can more effectively act on the tissue located near the knife channel 21 when the air is introduced.
When the inner cutter tube 3 moves to a first position along the axial direction, the sealing ring 43 is positioned outside the auxiliary tube 6, and the first cavity 41 and the second cavity 42 are communicated through the circulation structure 7;
when the inner cutter tube 3 moves to the second position along the axial direction, the sealing ring 43 is positioned outside the inner cutter tube 3, and the sealing ring 43 is in sealing contact with the inner cutter tube 3 so as to isolate the first cavity 41 from the second cavity 42.
The first cavity 41 and the second cavity 42 may be understood as annular cavities around the outer side of the inner cutter tube 3, which are sequentially distributed along the axial direction of the inner cutter tube 3, the first cavity 41 may be a cavity communicating with the inter-tube gap 5, and the second cavity 42 may be a cavity indirectly or directly communicating with the external atmosphere, for example, communicating with the external atmosphere through the rear end space, and further, when the first cavity 41 and the second cavity 42 communicate, the external atmosphere may be introduced.
The first position may be understood as any position where the flow structure 7 can be connected to the first cavity 41 and the second cavity 42, specifically, a position where the cutting edge structure 31 is located in the cutter groove 21 of the outer cutter tube 2, that is, when the inner cutter tube 3 moves to the first position along the axial direction thereof, the cutting edge structure 31 is located in the cutter groove 21.
The second position may be understood as any position where the first cavity 41 and the second cavity 42 are separated, specifically, a position where the cutting edge structure 31 is not located in the cutter groove 21 of the outer cutter tube 2, that is, when the inner cutter tube 3 moves to the second position along the axial direction, the cutting edge structure 31 is not located inside the cutter groove 21. At this point, the negative pressure provided by the system is sufficient to allow tissue to flow into knife channel 21.
The biopsy rotary cutting device provided by the embodiment can break an isobaric state by introducing the atmosphere from the outside to ensure that tissues can be sucked out efficiently, aiming at the situation that the sample outlet effect is poor, wherein the biopsy rotary cutting device provided by the embodiment of the utility model provides a first cavity capable of being communicated with a gap between inner and outer pipes and a second cavity capable of being communicated with the outside atmosphere through a dynamic sealing structure and a sealing ring in the dynamic sealing structure; when the inner cutter tube moves to the first position, the first cavity and the second cavity are communicated with the circulating structure of the auxiliary tube, air can be introduced into the inner cutter tube to form circulating air flow with better suction strength, the circulating air flow sequentially passes through the second cavity, the circulating structure, the first cavity and the inter-tube gap, and enters the inner cutter tube through one end of the inter-tube gap, which is close to the puncture head, and the circulating air flow can more efficiently convey the tissue which is cut by the inner side of the cutter tube to the sample collector at the rear end in a rotating way.
Meanwhile, the first cavity and the second cavity are distributed along the axial direction of the inner cutter pipe, the circulation structure is arranged between the first cavity and the second cavity along the axial direction of the inner cutter pipe, the generated gas flows are also along the axial direction, the conditions of bending and the like are avoided, the consistency of the flows is maintained, the increase of the gas flow stroke is avoided, the tissue conveying efficiency is further improved, and the sample yield is improved.
In this embodiment, the communication and the separation between the first cavity and the second cavity are brought by the movement of the inner cutter tube, and other manual or mechanical control is not required to be introduced during the movement, so that on one hand, the timeliness of the communication and the separation can be ensured, and on the other hand, the adverse influence of the communication and the separation on the movement of the inner cutter tube, such as the adverse influence of resistance, can be reduced.
In addition, since other manual or mechanical control is not required to be introduced in the embodiment, the embodiment can avoid other control to increase the abrasion degree of the structure, namely the embodiment can be beneficial to reducing abrasion, slowing down aging speed and prolonging service life, thereby being beneficial to reducing maintenance cost.
Meanwhile, since other mechanical structures such as a reset component and a driving component are not required to be introduced, the embodiment can also effectively ensure the tightness between the dynamic sealing structure and the cutter tube, thereby meeting the requirement of high-speed movement in the rotary cutting process (the rotating speed of the rotary cutter is fast, r=300 rpm can be reached every second).
FIG. 3 is a schematic view showing a state of a biopsy rotational atherectomy device according to another embodiment of the present utility model; FIG. 4 is an enlarged partial schematic view of area A of FIG. 3; FIG. 5 is a partially enlarged schematic illustration of region B of FIG. 4; FIG. 6 is an enlarged partial schematic view of region C of FIG. 5; FIG. 7 is a second schematic view of a rotational atherectomy device according to another embodiment of the utility model; fig. 8 is a partially enlarged schematic view of region D in fig. 7.
In this embodiment, please refer to fig. 1, 2, 3, 4, 7 and 8, the inner cutter tube 3 is rotated to the most distal position, i.e. the leftmost position shown in fig. 1, 2, 3 and 7, at which the cutter groove 21 of the outer cutter tube 2 is occupied by the head portion of the inner cutter tube 3, e.g. the portion containing the cutting edge structure 31, and the sealing ring 43 is located outside the auxiliary tube 6, which can be understood as the piercing stage, and can be understood as the first position, particularly referring to the positions shown in fig. 2 and 3.
When the puncturing is completed, the inner cutter tube 3 is retracted to the position shown in fig. 1, 7 and 8, which can be understood as being retracted to the second position, and at this time, for example, the head of the cutter blade structure 31 just does not block the cutter blade slot 21, which is the stage of adsorbing the tissue after the puncturing is completed, at this time, the first cavity 41 and the second cavity 42 are separated, the first cavity 41, the inter-tube gap 5, the inner space of the cutter blade structure 31 and the inner space of the inner cutter tube 3 are sequentially communicated, and are sealed and blocked with the second cavity 42, the tissue can be sucked into the cutter blade slot 21 by utilizing the negative pressure system, and when the tissue is sucked into the cutter blade slot 21, the inner cutter tube 3 repeatedly rotates and advances to the position shown in fig. 2 and 3, i.e. is screwed into the first position again, and in this process, the sucked tissue is resected by the cutter blade structure 31.
Along with the advancing of the inner cutter tube 3, the sealing ring 43 reaches the outer side of the auxiliary tube 6 again, so that the air can sequentially pass through the second cavity 42, the circulating structure 7, the first cavity 41, the inter-tube gap 5 and the inner space of the cutting edge structure 31 to form circulating air flow with better suction strength, and then the tissue is continuously negative pressure and introduced air is transmitted to the sample collector to finish the collection of the tissue.
When the external atmosphere does not flow into the knife groove 21, the whole knife set is in an isobaric state, and the tissue which is adsorbed and resected cannot flow out from the knife groove 21 to the sample collector or is difficult to flow out from the knife groove 21. Thus, the present embodiment effectively realizes the outflow of the tissue by introducing the atmosphere.
It can be seen that the above process completes a cycle of puncturing, adsorbing, rotary cutting and collecting, and then the inner cutter tube 3 can repeat part or all of the previous cycle for a plurality of times until the tissue to be resected is resected completely.
In order to realize the communication between the inner space of the cutting edge structure 31 and the inter-pipe gap 5, in this embodiment, in the alternative scheme, different modes of communicating the inter-pipe gap 5 and the inner space of the cutting edge structure 31 can be realized according to different structures of the cutting edge structure 31 at one end of the inner cutter pipe 3.
In one embodiment, a space may be formed between the outer periphery of the cutting edge structure 31 and the inner wall of the outer cutter tube 2, and the inter-tube gap 5 may be connected to a space on one side of the cutting edge structure 31, which is close to the puncture head 1, that is, a space in the outer cutter tube 2 between the cutting edge structure 31 and the puncture head 1, and may be further connected to an inner space of the cutting edge structure 31. In other alternative embodiments, the outer periphery of the edge structure 31 may be formed without a gap, or with a smaller gap, and the gap may be further formed so as not to hinder the movement of the inner cutter tube 3 within the outer cutter tube 2.
Referring to fig. 5, in combination with other figures, the inter-tube gap 5 may be communicated with the inner side of the edge structure 31 through a ventilation slit 32 provided in the edge structure 31. It can be understood that: the device may further include a ventilation slit 32 disposed along the axial direction of the inner cutter tube 3, where the ventilation slit 32 is disposed on the cutting edge structure 31, or disposed on the cutting edge structure 31 and the inner cutter tube 3, and the ventilation slit 32 is communicated with an inner space of the cutting edge structure 31 and the inter-tube gap 5, and an inner space of the cutting edge structure 31 is communicated with an inner space of the inner cutter tube 3.
The ventilation slit 32 can ensure that whether the inter-tube gap 5 can be communicated to the space of one side of the cutting edge structure 31, which is close to the puncture head 1, through the interval of the outer side of the cutting edge structure 31, the embodiment can realize that one end of the inter-tube gap 5, which is close to the puncture head 1, can be communicated with the inner space of the inner cutter tube 3, and then the requirement of tissue suction and tissue collection can be met through ventilation air flow.
In one embodiment, referring to fig. 5 and 6, the cutting edge structure 31 includes an annular cutting edge connecting portion 311 and a cutting edge portion 312, the cutting edge portion 312 is disposed at one end of the cutting edge connecting portion 311 near the puncture head 1, and one end of the cutting edge connecting portion 311 far away from the puncture head 1 is connected with one end of the inner cutter tube 3 near the puncture head 1. Further, the tip portion 312 may have an outer bevel 314, an inner bevel 315, and the outer bevel 314 and the inner bevel 315 may be joined to form the end 313 of the tip portion 312.
Wherein, the outer diameter of the cutting edge connecting part 311 may be larger than the outer diameter of the inner cutter tube 3 and smaller than the inner diameter of the outer cutter tube 2, and the diameter of the tip part 312 near the end 313 of the puncture head 1 may be larger than the inner diameter of the outer cutter tube 2. In a specific implementation process, the inner diameter of the cutting edge connecting portion 311 may be larger than the inner diameter of the inner cutter tube 3.
In one embodiment, referring to fig. 5, the ventilation slit 32 includes a main slit portion 321 disposed along the axial direction of the inner cutter tube 3, and circular end portions 322 disposed at two ends of the main slit portion 321, respectively, and further, one circular end portion 322 may be disposed at the cutting edge connecting portion 311, and the other circular end portion 322 may be disposed at the inner cutter tube 3. Which ensures that the atmosphere can flow from the circular end 322 into the space inside the edge structure 31 regardless of the rotation of the inner knife to any angle.
Wherein the diameter of the circular end portion 322 is larger than the width of the main slit portion 311.
Figure 9 is a schematic diagram of the distribution of ventilation slits in an embodiment of the present utility model.
In one embodiment, referring to fig. 9, the number of ventilation slits 32 may be plural, and the ventilation slits 32 are uniformly distributed around the axial direction of the inner cutter tube 3. Further, the circumferential spacing between two adjacent ventilation slits 32 is smaller than the circumferential dimension of the sipe 21. As shown in fig. 9, for example, 6 ventilation slits 32 may be provided uniformly along the circumference, so that the ventilation slits 32 are located in the knife groove 21 of the outer knife tube 2 regardless of any angle of rotation of the inner knife tube, and thus the generated air flow can flow near the knife groove 21.
In one embodiment, the dynamic sealing structure 4 includes a sealing base 44 and a sealing sleeve 45, where the sealing base 44 is fixedly connected to the outside of the outer cutter tube 2, and may be directly connected or indirectly connected; the sealing sleeve 45 is fixedly connected with the sealing base 44, the sealing sleeve 45 and the sealing base 44 are provided with a mounting gap along the axial direction of the inner cutter tube 3, the sealing ring 43 is mounted in the mounting gap, the sealing sleeve 45 is positioned at the outer side of the inner cutter tube 3, the first cavity 41 is positioned in the sealing base 44, and the second cavity 42 is positioned in the sealing sleeve 45.
Wherein the seal base 44 may be fixedly connected to the dial structure 9, for example: the end face of the head of the sealing base 44 may be connected with and completely sealed from the inner end face of the dial base 92 in the dial structure 9, and the connection manner is not limited to glue adhesion, laser welding, and the like. A certain gap is formed between the end face of the head of the sealing base 44 and the inner end face of the dial body 91 in the dial structure 9, so that the dial body 91 can rotate around the axis of the outer cutter tube 2.
In a further alternative embodiment, or other alternative embodiments, the outer surface of the outer cutter tube 2 may also be fixedly connected with the inner surface of the sealing base 44, and the fixing manner is not limited to glue adhesion, laser welding, and the like.
In the specific implementation process, please refer to fig. 4 and 8, the sealing sleeve 45 includes a sleeve body 452 and a barrel connecting portion 451, the sleeve connecting portion 451 is disposed on a side of the sleeve body 452 near the puncture head 1, an inner side of the sleeve connecting portion 451 is fixedly connected with an outer side of the sealing base 44, and the sleeve body 452 and the sealing base 44 are disposed at intervals along an axial direction of the inner cutter tube 3 so as to form the mounting gap. The size of the mounting gap may be matched to the size of the sealing ring 43, and may be suitable for mounting the sealing ring 43.
The connection and fixation between the outer surface of the sealing base 44 and the inner surface of the sealing sleeve 45 may be varied, and is not limited to glue adhesion, screw fitting, etc.
In other alternative embodiments, the sealing sleeve 45 and the sealing base 44 may be integrally formed, and thus, any one-piece or assembled dynamic sealing structure 4 capable of directly or indirectly connecting with the outer cutter tube 2 may be formed without departing from the scope of the present embodiment.
In addition, a seat rear sleeve 8 is connected to the side of the dial structure 9 away from the puncture head 1, the seal sleeve 45 may be located inside the seat rear sleeve 8, and the seal base 44 may be located inside the dial base 92 of the dial structure 9.
FIG. 10 is a schematic view of the structure of an auxiliary pipe according to an embodiment of the present utility model; FIG. 11 is a schematic view of section A-A of FIG. 10; FIG. 12 is a schematic view of section B-B of FIG. 10; FIG. 13 is a schematic view showing the structure of an auxiliary pipe according to another embodiment of the present utility model; FIG. 14 is a schematic view of section C-C of FIG. 13; fig. 15 is a schematic view of section D-D of fig. 13.
In one embodiment, referring to fig. 10 to 15, the flow structure 7 is a groove structure or a slit structure axially disposed along the inner cutter tube 3 and open on the outer surface of the auxiliary tube 6.
When the groove structure and the slit structure are both the structures that the sealing ring 43 contacts the outer side of the auxiliary pipe 6, the first cavity 41 and the second cavity 42 on two sides of the sealing ring 43 can be communicated, and the difference can be understood as: the slot structure may be non-penetrating the inner wall and the outer wall of the auxiliary tube 6, and the slot structure may be penetrating the inner wall and the outer wall of the auxiliary tube 6. Without departing from the scope of description of alternative implementations of the present embodiment.
In the implementation process, referring to fig. 10 to 15, the circulation structure 7 may be a slit structure, and further, in the structures shown in fig. 10 to 12, the auxiliary tube 6 further forms a circulation cavity 63 outside the inner cutter tube 3, and the circulation cavity 63 is communicated with the inner side of the slit structure. In an alternative implementation, referring to fig. 13 to 15, the auxiliary tube 6 does not form the circulation cavity 63, which is understood to mean that the diameter of the inner wall of the auxiliary tube 6 is uniform. It can be seen that the auxiliary tube 6 may be in a gap with the inner cutter tube 3 or may be in a gap-free state.
In one embodiment, the auxiliary tube 6 includes an annular middle portion 61 and annular end portions 62 located at both ends of the annular middle portion 61 in the axial direction of the inner cutter tube 3, and the annular middle portion 61 has an outer diameter larger than that of the annular end portions 62. Which enables the sealing ring 43 to be smoothly and slightly spread out to reach the auxiliary tube 6 in the rapid axial movement.
Furthermore, the flow-through chamber 63 may be located inside the annular intermediate portion 62, in particular between the annular intermediate portion 62 and the inner cutter tube 3.
In summary, according to the biopsy rotary cutting device provided by the embodiment, for the case that the sample output effect is poor, the isobaric state can be broken by introducing the atmosphere from the outside, so that the tissue can be sucked out efficiently, wherein the embodiment provides a first cavity capable of communicating with the gap between the inner tube and the outer tube and a second cavity capable of communicating with the outside atmosphere through the dynamic sealing structure and the sealing ring therein; when the inner cutter tube moves to the first position, the first cavity and the second cavity are communicated with the circulating structure of the auxiliary tube, air can be introduced into the inner cutter tube to form circulating air flow with better suction strength, the circulating air flow sequentially passes through the second cavity, the circulating structure, the first cavity and the inter-tube gap, and enters the inner cutter tube through one end of the inter-tube gap, which is close to the puncture head, and the circulating air flow can more efficiently convey the tissue which is cut by the inner side of the cutter tube to the sample collector at the rear end in a rotating way.
Meanwhile, the first cavity and the second cavity are distributed along the axial direction of the inner cutter pipe, the circulation structure is arranged between the first cavity and the second cavity along the axial direction of the inner cutter pipe, the generated gas flows are also along the axial direction, the conditions of bending and the like are avoided, the consistency of the flows is maintained, the increase of the gas flow stroke is avoided, the tissue conveying efficiency is further improved, and the sample yield is improved.
In this embodiment, the communication and the separation between the first cavity and the second cavity are brought by the movement of the inner cutter tube, and other manual or mechanical control is not required to be introduced during the movement, so that on one hand, the timeliness of the communication and the separation can be ensured, and on the other hand, the adverse influence of the communication and the separation on the movement of the inner cutter tube, such as the adverse influence of resistance, can be reduced.
In addition, since other manual or mechanical control is not required to be introduced in the embodiment, the embodiment can avoid other control to increase the abrasion degree of the structure, namely the embodiment can be beneficial to reducing abrasion, slowing down aging speed and prolonging service life, thereby being beneficial to reducing maintenance cost.
Meanwhile, since other mechanical structures such as a reset component and a driving component are not required to be introduced, the embodiment can also effectively ensure the tightness between the dynamic sealing structure and the cutter tube, thereby meeting the requirement of high-speed movement in the rotary cutting process (the rotating speed of the rotary cutter is fast, r=300 rpm can be reached every second).
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.
Claims (9)
1. The biopsy rotary cutting device comprises an inner cutter tube and an outer cutter tube which are coaxially arranged, wherein the inner cutter tube is positioned at the inner side of the outer cutter tube, a puncture head is arranged at the head end of the outer cutter tube, and one end, far away from the puncture head, of the inner cutter tube is directly or indirectly connected with a sample collector; the device is characterized by further comprising a dynamic sealing structure arranged on the outer side of the inner cutter tube;
the dynamic sealing structure is provided with a cavity outside the inner cutter tube, a sealing ring is arranged in the dynamic sealing structure, the cavity comprises a first cavity body positioned at one side of the sealing ring, which is close to the puncture head, and a second cavity body positioned at one side of the sealing ring, which is far away from the puncture head, and the first cavity body is communicated with an inter-tube gap between the outer wall of the inner cutter tube and the inner wall of the outer cutter tube; one end of the inter-tube gap, which is close to the puncture head, is communicated with the inner side space of the inner cutter tube; an auxiliary pipe is arranged on the outer side of the inner cutter pipe, and a circulation structure is arranged on the auxiliary pipe;
when the inner cutter tube moves to a first position along the axial direction of the inner cutter tube, the sealing ring is positioned at the outer side of the auxiliary tube, and the first cavity is communicated with the second cavity through the circulation structure;
when the inner cutter tube moves to a second position along the axial direction of the inner cutter tube, the sealing ring is positioned at the outer side of the inner cutter tube, and the sealing ring is in sealing contact with the inner cutter tube so as to isolate the first cavity from the second cavity;
the inner cutter pipe is provided with a cutting edge structure at one end close to the puncture head, a cutter groove is formed in the pipe wall part of the outer cutter pipe close to the puncture head, and one end, far away from the puncture head, of the inner cutter pipe is directly or indirectly connected with a sample collector; wherein the knife slot is used for adsorbing tissues into the outer knife tube; tissue sucked into the knife slot can be cut off by the cutting edge structure;
when the inner cutter tube moves to the first position along the axial direction of the inner cutter tube, the cutting edge structure is positioned in the cutter groove; when the inner cutter tube moves to the second position along the axial direction of the inner cutter tube, the cutting edge structure is not positioned at the inner side of the cutter groove.
2. The device of claim 1, wherein the flow-through structure is a groove structure or a slit structure provided along the inner knife shaft and open to the outer surface of the auxiliary tube.
3. The device of claim 2, wherein the flow-through structure is a slit structure, and the auxiliary tube is further formed with a flow-through cavity outside the inner cutter tube, and the flow-through cavity is communicated with the inner side of the slit structure.
4. The device of claim 1, wherein the auxiliary tube comprises an annular intermediate portion and annular end portions at both ends of the annular intermediate portion in an axial direction of the inner cutter tube, the annular intermediate portion having an outer diameter greater than an outer diameter of the annular end portions.
5. The device of claim 4, further comprising a vent slot disposed along an axial direction of the inner cutter tube, the vent slot being disposed in the blade structure, or the blade structure and the inner cutter tube, the vent slot communicating an interior space of the blade structure with the inter-tube gap, the interior space of the blade structure communicating an interior space of the inner cutter tube.
6. The device of claim 5, wherein the number of ventilation slits is a plurality, the plurality of ventilation slits being evenly distributed around the axial direction of the inner cutter tube.
7. The device of claim 6, wherein the cutting edge structure comprises an annular cutting edge connecting portion and a cutting edge tip portion, the cutting edge tip portion is arranged at one end of the cutting edge connecting portion, which is close to the puncture head, and one end of the cutting edge connecting portion, which is far away from the puncture head, is connected with one end of the inner cutter tube, which is close to the puncture head.
8. The device of claim 7, wherein the diameter of the cutting edge connection is greater than the outer diameter of the inner cutter tube and less than the inner diameter of the outer cutter tube; the diameter of the end of the blade tip, which is close to the puncture head, is larger than the inner diameter of the outer cutter tube.
9. The device of any one of claims 1 to 4, wherein the dynamic seal structure comprises a seal base and a seal sleeve, the seal base is fixedly connected to the outside of the outer cutter tube, the seal sleeve is fixedly connected to the seal base, the seal sleeve and the seal base are provided with a mounting gap along the axial direction of the inner cutter tube, the seal ring is mounted in the mounting gap, the seal sleeve is positioned on the outside of the inner cutter tube, the first cavity is positioned in the seal base, and the second cavity is positioned in the seal sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811336369.4A CN109330633B (en) | 2018-11-09 | 2018-11-09 | Biopsy rotary cutting device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811336369.4A CN109330633B (en) | 2018-11-09 | 2018-11-09 | Biopsy rotary cutting device |
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| CN109330633A CN109330633A (en) | 2019-02-15 |
| CN109330633B true CN109330633B (en) | 2023-10-10 |
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| CN110507405A (en) * | 2019-08-13 | 2019-11-29 | 上海导向医疗系统有限公司 | The cryoablation needle of adjustable targeting district |
| CN110604613A (en) * | 2019-08-13 | 2019-12-24 | 上海导向医疗系统有限公司 | Curved adjustable cryoablation needle |
| CN110478028A (en) * | 2019-08-13 | 2019-11-22 | 上海导向医疗系统有限公司 | A kind of curved adjustable freezing ablation needle |
| CN110559021B (en) * | 2019-09-20 | 2021-05-18 | 吉林大学 | Biopsy of oncology doctor is with biopsy protection device that takes a sample |
| CN113243941B (en) * | 2021-04-30 | 2023-06-27 | 重庆西山科技股份有限公司 | Mode-adjustable biopsy system |
| CN113243949B (en) * | 2021-06-30 | 2021-11-12 | 上海导向医疗系统有限公司 | Biopsy rotary-cut device |
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