CN213283102U - Backflow preventing device for biopsy needle - Google Patents

Abstract

The utility model relates to the technical field of medical equipment, concretely relates to backflow device is prevented to biopsy needle. The specific technical scheme is as follows: the utility model provides a backflow device is prevented to biopsy needle, includes the needle tubing and sets up in the needle tubing and stretch out the nook closing member on needle tubing top, the top of nook closing member is connected with the hose through the connecting piece, the other end of hose is connected with the sampling piece, the sampling piece includes inside hollow sampling chamber, the bottom is provided with the water conservancy diversion platform in the sampling chamber, the hose passes the water conservancy diversion platform and stretch out from its top with the inner chamber of sampling chamber communicates with each other, the top intercommunication of sampling chamber have with the symmetrical pipe of hose, be provided with in the pipe rather than interference fit's sampling tube, be connected with on the sampling tube and take out negative pressure equipment. The utility model provides a current biopsy needle tissue sample after the sample from the problem that flows in the gap of nook closing member and needle tubing.

Description

Backflow preventing device for biopsy needle

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to backflow device is prevented to biopsy needle.

Background

The biopsy needle is a medical instrument suitable for various organs such as kidney, liver, lung, mammary gland, thyroid gland, prostate, pancreas, testis, uterus, ovary, body surface and the like, and can be used for biopsy sampling and cell suction of cone tumor, unknown tumor and the like.

However, most of the conventional biopsy needles have a needle core provided in a needle tube, a sampling groove provided in a position of the needle core close to a needle tip thereof, and a body organ is sampled by inserting the needle core into the body organ to allow a tissue to enter the sampling groove and then withdrawing the needle core. However, because a certain gap is formed between the needle tube and the needle core, a part of tissue flows out from the gap in the process of taking out the needle core, and even the tissue directly flows into a human body without waiting for the needle core to be taken out of the human body, so that sampling fails or sampling quantity is not enough and sampling needs to be carried out again; furthermore, during subsequent processing of the collected tissue, the tissue in the sampling slot is exposed to air, which may risk contaminating the tissue sample.

Disclosure of Invention

The utility model provides a to prior art not enough, the utility model provides a backflow device is prevented to biopsy needle has solved the problem that current biopsy needle flows in the gap of sample tissue sample follow nook closing member and needle tubing after the sample.

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes:

the utility model discloses a backflow device is prevented to biopsy needle, including needle tubing and the nook closing member that sets up in the needle tubing and stretch out the needle tubing top, the top of nook closing member is connected with the hose through the connecting piece, the other end of hose is connected with sampling piece, sampling piece includes inside hollow sampling chamber, the bottom is provided with the water conservancy diversion platform in the sampling chamber, the hose passes water conservancy diversion platform and stretch out from its top with the inner chamber of sampling chamber communicates with each other, the top intercommunication of sampling chamber have with the symmetrical pipe of hose, be provided with the sampling tube rather than interference fit in the pipe, be connected with on the sampling tube and take out negative pressure equipment.

Preferably, the flow guide table is in a circular truncated cone shape, the hose extends out of the small-diameter end of the flow guide table, an annular clamping table is arranged on the periphery close to the end opening of the hose, and the bottom surface of the annular clamping table is attached to the top surface of the flow guide table; the sampling chamber is provided with a sampling hole, and the sampling hole is provided with a sealing plug.

Preferably, the sampling tube is divided into a straight tube section and a tapered tube section, the tapered tube section is completely positioned in the conduit, and the straight tube section partially extends into the conduit; the diameter of the conical pipe section is gradually reduced from the connection part of the conical pipe section and the straight pipe section, and the minimum diameter of the conical pipe section is smaller than the inner diameter of the hose.

Preferably, the hose is a reducer, the small-diameter section extends into the sampling chamber, the large-diameter section is fixed with the stylet through the connecting piece, and the outer diameter of the large-diameter section is the same as that of the stylet.

Preferably, divide into unthreaded hole section and internal thread section from last to down in the connecting piece, be close to its mouth of pipe department on the outer wall of nook closing member be provided with the external screw thread of internal thread section adaptation, the unthreaded hole section with hose major diameter section interference fit.

Preferably, a sealing piece is arranged at the nozzle of the needle tube, and the needle core penetrates through the sealing piece.

Preferably, the sealing element comprises a limiting table and an annular sealing table fixed on the bottom surface of the limiting table, and through holes for the needle cores to pass through are formed in the sealing table and the limiting table respectively.

Preferably, the thickness of the sealing platform is smaller than the gap between the needle core and the needle tube.

Preferably, the inner wall of the through hole is provided with a metal sheet, and the metal sheet is attached to the outer wall of the needle core.

Preferably, the total thickness of the metal sheet and the sealing platform is equal to the gap between the needle core and the needle tube.

The utility model discloses possess following beneficial effect:

the utility model discloses a detachable connected mode is set to hose and nook closing member to the connecting piece for after tissue sample collection is accomplished, can take off sample piece, directly just seal the save to tissue sample in sample piece, the effectual tissue sample who has avoided the collection exposes in the air, and then leads to tissue sample to infect. Specifically, the method comprises the following steps: the utility model discloses be provided with the water conservancy diversion platform that is the round platform form in the sampling chamber, make the tissue sample flow to the bottommost of sampling chamber along the side of water conservancy diversion platform, and accomplish the back in the sample, press the sampling tube through the direction towards the hose, make the sampling tube to the indoor motion of sample, and insert in the hose, until with the hose chucking, can't stretch into in the hose again, then will take out negative pressure equipment and take off from the sampling tube, thereby make the interior inclosed environment that forms of sampling chamber, can carry out random removal, can not make the pollution to the tissue sample yet. Meanwhile, in the sampling process, the guide table has a certain height, so that the tissue sample can not flow back to the needle core through the hose and enter the human body through the needle core.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a connector structure;

FIG. 3 is a schematic view of a hose construction;

FIG. 4 is a schematic view of a sampling member;

FIG. 5 is an enlarged view of a portion A of FIG. 4;

FIG. 6 is a schematic view of a seal configuration;

in the figure: the needle tube 1, the needle core 2, the connecting piece 3, the unthreaded hole section 31, the internal thread section 32, the hose 4, the sampling piece 5, the sampling chamber 51, the guide table 52, the conduit 53, the sampling tube 54, the annular clamping table 55, the sampling hole 56, the sealing element 6, the limiting table 61, the sealing table 62, the through hole 63 and the metal sheet 64.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Unless otherwise indicated, the technical means used in the examples are conventional means well known to those skilled in the art.

Referring to fig. 1-6, the utility model discloses a backflow device is prevented to biopsy needle, including needle tubing 1 and the nook closing member 2 that sets up in needle tubing 1 and stretch out needle tubing 1 top, nook closing member 2 is the hollow tube, and on needle tubing 1's top, it is sealed through sealing member 6 between needle tubing 1 and the nook closing member 2, and sealing member 6 is when sealing up the top of needle tubing 1, also does not influence nook closing member 2 and slide from top to bottom in needle tubing 1. The arrangement of the seal 6 is to be understood here as: the needle core 2 is limited in the needle tube 1 not for absolute sealing between the needle core 2 and the needle tube 1, so that the needle core 2 is prevented from colliding with the inner wall of the needle tube 1 back and forth, and the use of the needle core 2 is prevented from being influenced; meanwhile, the phenomenon that the external impurities such as dust enter the needle tube 1 to the greatest extent and even enter the body of a patient through the needle tube 1 to affect the body health of the patient is avoided.

The method specifically comprises the following steps: a sealing piece 6 is arranged at the nozzle of the needle tube 1, and the needle core 2 passes through the sealing piece 6. The sealing element 6 comprises a limiting table 61 and an annular sealing table 62 fixed on the bottom surface of the limiting table 61, through holes 63 with the same aperture for the needle core 2 to pass through are respectively arranged on the sealing table 62 and the limiting table 61, and the through holes 63 are used for the needle core 2 to pass through. The thickness of the sealing platform 62 is smaller than the gap between the needle core 2 and the needle tube 1, so that the needle core 2 is prevented from tightly abutting against the inner wall of the through hole 63, the needle core 2 is difficult to slide up and down in the through hole 63, and the operation is difficult and the sampling is difficult in the use process of the biopsy needle. The sealing element 6 is preferably made of rubber, has certain elasticity, can increase the friction force between the needle tube 1 and the sealing element, is not easy to fall off, and has better sealing effect; but at the same time, the frictional force between the core 2 and the through hole 63 is increased, and it is difficult to move the core 2 up and down. Therefore, the metal sheet 64 is arranged on the inner wall of the through hole 63, the total thickness of the metal sheet 64 and the sealing platform 62 is equal to the gap between the needle core 2 and the needle tube 1, and the metal sheet 64 is attached to the outer wall of the needle core 2, so that the needle core 2 can smoothly slide up and down in the through hole 63, and the use of the needle core is prevented from being influenced.

The top of nook closing member 2 is connected with hose 4 through connecting piece 3, and hose 4 is the reducing pipe, divide into major diameter section, reducing section and path section in proper order, and the external diameter of reducing section reduces towards the path section because the junction of major diameter section gradually. Namely, the large-diameter section and the small-diameter section are both straight pipes, and the variable-diameter section is a conical pipe; providing the flexible tube 4 with different diameters increases the pressure during sampling, avoiding that the tissue sample cannot be drawn into the sampling chamber 51 due to insufficient pressure. The large-diameter section of the hose 4 is fixed with the stylet 2 through the connecting piece 3, and the outer diameter of the hose is the same as that of the stylet 2; the small diameter section is connected to the sampling member 5. Divide into unthreaded hole section 31 and internal thread section 32 from last to down in the connecting piece 3, be close to its mouth of pipe department on the outer wall of nook closing member 2 and be provided with the external screw thread with internal thread section 32 looks adaptation, the length that the external screw thread set up sets up according to actual conditions. The inner diameter of the unthreaded hole section 31 is less than or equal to the outer diameter of the large-diameter section of the hose 4, namely, the inner wall of the unthreaded hole section 31 can be attached to the outer wall of the large-diameter section of the hose 4, which is equivalent to interference fit. For the connecting element 3, it is to be noted that: the purpose of the connector 3 is to removably connect the hub 2 to the hose 4. After the sample is accomplished, can directly take off sample 5, the tissue sample that furthest avoided gathering is exposed in the air for a long time and is polluted, and also is convenient for remove sample 5 wholly takes off. When the connecting piece 3 is used, the connecting piece 3 is only required to be sleeved on the hose 4, the internal thread section 32 faces downwards, then the pipe orifice of the large-diameter section of the hose 4 corresponds to the pipe orifice of the needle core 2, the connecting piece 3 is pushed downwards until the internal thread section 32 is contacted with the external thread, and then the connecting piece 3 is screwed to fix the connecting piece 3 and the needle core 2 through threads; at this moment, the unthreaded hole section 31 then moves towards the nook closing member 2 gradually, and in the removal process, the inner wall of unthreaded hole section 31 pastes closely with the major diameter section outer wall of hose 4 gradually, and it can't twist again to realize that connecting piece 3 fixes nook closing member 2 and hose 4.

The sampling member 5 comprises a hollow sampling chamber 51, a flow guide table 52 is arranged at the bottom in the sampling chamber 51, and the small-diameter section of the hose 4 passes through the flow guide table 52 and extends out from the top to be communicated with the inner cavity of the sampling chamber 51. The guide table 52 is in a circular truncated cone shape, so that liquid in the tissue sample enters the sampling chamber 51 along the side wall of the guide table 52, and the tissue sample is prevented from overflowing through a gap between the hose 4 and the guide table 52. The hose 4 stretches out from the small-diameter end of the guide table 52, in order to further avoid the collected tissue sample to flow out from the gap between the hose 4 and the guide table 52, and simultaneously avoid the hose 4 to be separated from the sampling piece 5, a circle of annular clamping table 55 is arranged on the periphery of the top end of the small-diameter section of the hose 4, the annular clamping table 55 is made of rubber, the bottom surface of the annular clamping table 55 is attached to the top surface of the guide table 52, the width of the bottom surface of the annular clamping table 55 is greater than the width of the top surface of the guide table 52 (namely the distance between the edges of the top surfaces of the hose 4 and the guide table 52), the top surface of the guide table 52 can be completely covered, and the tissue sample is. Because the side of the annular clamping table 55 is an inclined surface, the annular clamping table 55 can more easily penetrate through the guide table 52 and enter the sampling chamber 51, namely, the aperture of a hole in the guide table 52 through which the hose 4 passes is larger than the outer diameter of the hose 4, so that the hose 4 can just penetrate through the hole, and meanwhile, the annular clamping table 55 penetrates through the guide table 52 and enters the sampling chamber 51 in an extruding manner.

The top of the sampling chamber 51 is communicated with a conduit 53 symmetrical to the hose 4, a sampling tube 54 in interference fit with the conduit 53 is arranged in the conduit 53, and a negative pressure pumping device is connected to the sampling tube 54. The sampling chamber 51 is provided with a sampling hole 56, the sampling hole 56 is provided with a sealing plug, the sampled tissue sample can be taken out conveniently, or the sampling hole 56 is not arranged, and the sampling tube 54 can be directly pulled out to sample through the guide tube 53. And the negative pressure pumping device can be a negative pressure pumping machine and also can be a piston type (similar to a syringe).

Further, the sampling tube 54 is divided into a straight tube section and a tapered tube section, the tapered tube section is completely located in the guide tube 53, and the straight tube section partially extends into the guide tube 53, so that the guide tube 53 is tightly clamped with the sampling tube 54. The end part of the straight pipe section is connected with negative pressure pumping equipment, so that a human tissue sample is collected. The diameter of the tapered pipe section is gradually reduced from the connection part of the tapered pipe section and the straight pipe section, and the minimum diameter of the tapered pipe section is smaller than the inner diameter of the hose 4, so that the tapered pipe section can be completely or partially inserted into the hose 4, the sampling chamber 51 forms a closed environment, and outside air is prevented from entering the sampling chamber 51 to pollute a sample.

The utility model discloses in, hose 4, sample piece 5, spacing platform 61 and seal platform 62 all are the rubber material, have certain elasticity, consequently in the use, contact other parts with above-mentioned part and all can carry out certain degree extrusion (interference fit)/extension (propping greatly promptly, strutting) to it.

When the utility model is used, the tissue of the human body is sampled only by the negative pressure pumping device, after the sampling is completed, the negative pressure pumping device is closed, the biopsy needle is pumped out of the human body, the negative pressure pumping device is started again, the tissue left in the needle core 2 is pumped into the sampling chamber 51, then the negative pressure pumping device is closed, and the sampling tube 54 is pushed into the sampling chamber 51 until the sampling tube 54 is inserted into the hose 4 until the sampling tube is tightly pressed; the suction device is then removed, the connector 3 is removed, the hose 4 and the core 2 are separated, and the sample piece 5 with the tissue sample is then transported to the testing chamber for a corresponding test, wherein the tissue sample is in the sampling chamber 51 during the whole process, without the problems of the tissue sample overflowing and being exposed to air and coming into contact with air. Meanwhile, in the process of extracting the tissue sample, the problem that the tissue sample in the sampling chamber 51 and the stylet 2 flows back to the human body through the stylet 2 is effectively avoided.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description of the present invention, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

The above-mentioned embodiments are only intended to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and those skilled in the art should also be able to make various modifications and improvements to the technical solution of the present invention without departing from the spirit of the present invention, and all such modifications and improvements are intended to fall within the scope of the present invention as defined in the appended claims.

Claims (10)

1. The utility model provides a biopsy needle anti-backflow device, includes needle tubing (1) and sets up in needle tubing (1) and stretch out nook closing member (2) on needle tubing (1) top, its characterized in that: the top of nook closing member (2) is connected with hose (4) through connecting piece (3), the other end of hose (4) is connected with sampling piece (5), sampling piece (5) are including inside hollow sampling chamber (51), the bottom is provided with water conservancy diversion platform (52) in sampling chamber (51), hose (4) are passed water conservancy diversion platform (52) and stretch out from its top with the inner chamber of sampling chamber (51) communicates with each other, the top intercommunication of sampling chamber (51) have with the symmetrical pipe (53) of hose (4), be provided with in pipe (53) rather than interference fit's sampling tube (54), be connected with on sampling tube (54) and take out negative pressure equipment.

2. The biopsy needle anti-reflux device according to claim 1, wherein: the flow guide table (52) is in a circular truncated cone shape, the hose (4) extends out from the small-diameter end of the flow guide table (52), an annular clamping table (55) is arranged on the periphery close to the port of the hose (4), and the bottom surface of the annular clamping table (55) is attached to the top surface of the flow guide table (52); the sampling chamber (51) is provided with a sampling hole (56), and the sampling hole (56) is provided with a sealing plug.

3. The biopsy needle anti-reflux device according to claim 1, wherein: the sampling tube (54) is divided into a straight tube section and a tapered tube section, the tapered tube section is completely positioned in the guide tube (53), and the straight tube section partially extends into the guide tube (53); the diameter of the conical pipe section is gradually reduced from the connection part of the conical pipe section and the straight pipe section, and the minimum diameter of the conical pipe section is smaller than the inner diameter of the hose (4).

4. The biopsy needle anti-reflux device according to claim 1, wherein: the hose (4) is a reducer, the small-diameter section extends into the sampling chamber (51), the large-diameter section is fixed with the needle core (2) through the connecting piece (3), and the outer diameter of the large-diameter section is the same as that of the needle core (2).

5. The biopsy needle anti-reflux device according to claim 1, wherein: divide into unthreaded hole section (31) and internal thread section (32) from last down in connecting piece (3), be close to its mouth of pipe department on the outer wall of nook closing member (2) be provided with the external screw thread of internal thread section (32) looks adaptation, unthreaded hole section (31) with hose (4) major diameter section interference fit.

6. The biopsy needle anti-reflux device according to claim 1, wherein: a sealing piece (6) is arranged at the pipe orifice of the needle tube (1), and the needle core (2) penetrates through the sealing piece (6).

7. The anti-reflux device for biopsy needle of claim 6, wherein: the sealing element (6) comprises a limiting table (61) and an annular sealing table (62) fixed on the bottom surface of the limiting table (61), and through holes (63) which are used for the needle cores (2) to pass through and have the same aperture are respectively formed in the sealing table (62) and the limiting table (61).

8. The anti-reflux device for biopsy needle of claim 7, wherein: the thickness of the sealing platform (62) is smaller than the clearance between the needle core (2) and the needle tube (1).

9. The anti-reflux device for biopsy needle of claim 7, wherein: the inner wall of the through hole (63) is provided with a metal sheet (64), and the metal sheet (64) is attached to the outer wall of the needle core (2).

10. The anti-reflux device for biopsy needle of claim 9, wherein: the total thickness of the metal sheet (64) and the sealing platform (62) is equal to the clearance between the needle core (2) and the needle tube (1).

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