CN219782617U - Biopsy needle - Google Patents

Abstract

The utility model discloses a biopsy needle which comprises a shell, a needle core unit and a stroke adjusting unit, wherein the needle core unit is arranged in the shell in a sliding mode, the stroke adjusting unit is arranged at the front end of the shell, the position of the stroke adjusting unit in the front-back direction of the shell is adjustable, and the firing stroke of the needle core unit is adjusted by adjusting the position of the stroke adjusting unit. The biopsy needle is provided with the stroke adjusting unit, the position of the stroke adjusting unit along the front and back direction of the shell is adjustable, the firing stroke of the needle core unit is correspondingly adjusted, the selectivity of the firing stroke of the needle core unit is greatly increased, the sampling stroke is flexibly set during biopsy sampling, the operation is convenient, and the two requirements of sampling quantity and safety are simultaneously met.

Description

Biopsy needle

Technical Field

The utility model relates to a medical instrument, in particular to a biopsy needle.

Background

Biopsy, for short, is a method of cancer examination in which a tissue sample is taken from a suspected tumor lesion in a patient, pathological analysis is performed, and diagnosis is made. When the imaging examination result shows that the tumor lesion exists in the patient, biopsy sampling is needed to be carried out on the lesion part, and diagnosis is carried out on whether the tumor is malignant and the development degree of the tumor according to the abnormality degree of the tissue cell structure of the obtained sample. At present, biopsy is the cancer detection method with highest accuracy and reliability, and is widely applied to the judgment of the degree of deterioration of cancer lesions at various organs of a human body. Currently, needle biopsies, which use a biopsy needle to cut a sample, are the most commonly used minimally invasive biopsy methods. In needle biopsies, a physician needs to rely on a biopsy needle to complete a sample. In biopsy, according to the size of the focus and the dangerous degree near the focus, different firing strokes can help doctors to realize sampling with different lengths and reduce the damage to patients as much as possible; while at the same time doctors often want to take as many samples as possible. Semiautomatic biopsy needles often require adjustment of preset travel options prior to penetration to achieve different sample firing lengths. The existing semiautomatic biopsy needle stroke adjustment gears are few (usually only 2 strokes), cannot be set according to the size of a focus, and have high requirements on the experience of doctors.

Disclosure of Invention

The utility model aims to overcome the defect of less stroke of a biopsy needle in the prior art and provides the biopsy needle.

The utility model solves the technical problems by the following technical scheme:

the biopsy needle comprises a shell, a needle core unit and a stroke adjusting unit, wherein the needle core unit is slidably arranged in the shell, the stroke adjusting unit is mounted at the front end of the shell, the position of the stroke adjusting unit in the front-back direction of the shell is adjustable, and the firing stroke of the needle core unit is adjusted by adjusting the position of the stroke adjusting unit.

In this scheme, install stroke adjustment unit on this biopsy needle, stroke adjustment unit is along the position of the fore-and-aft direction of casing adjustable, adjusts the percussion stroke of nook closing member unit correspondingly, greatly increased the selectivity of nook closing member unit percussion stroke, when making the biopsy sample, nimble setting sampling stroke, convenient operation to satisfy two demands of sample volume and security simultaneously.

Preferably, the needle core unit comprises a needle core, a needle core seat and a connecting rod, the needle core is arranged on the needle core seat, the connecting rod extends along the extending direction of the needle core, one end of the connecting rod is connected with the needle core seat, the other end of the connecting rod is connected with an abutting part, and one side, far away from the connecting rod, of the abutting part can be abutted with the stroke adjusting unit.

In this scheme, because the one end of nook closing member is connected on the nook closing member seat, the one end of connecting rod is also connected on the nook closing member seat, nook closing member seat and connecting rod synchronous slip, when the nook closing member slip forward slides to the butt portion butt in the stroke adjustment unit of connecting rod, the stroke adjustment unit prevents the nook closing member to slide forward through butt portion, connecting rod and nook closing member seat, thereby inject the slip stroke of nook closing member, because the position of stroke adjustment unit in the fore-and-aft direction of casing can be followed is adjustable, the flexibility of the stroke adjustment of nook closing member has been increased correspondingly.

Preferably, a handle is arranged at one end of the needle core seat away from the needle core.

In the scheme, the structure is adopted, so that a doctor can push and pull the needle core through the grab handle conveniently.

Preferably, the biopsy needle further comprises a needle tube unit, the needle tube unit comprises a needle tube, the needle tube is sleeved outside the needle core and can slide relative to the needle core, a containing groove is formed in the outer peripheral surface of the front end of the needle core, and when the needle tube slides to the front end of the needle core, the needle tube covers the containing groove.

In this scheme, the holding groove on the needle core is used for holding living tissue when the needle core inserts focus department, and the needle tubing is used for cutting living tissue when sliding to the front end of needle core, makes living tissue in the holding groove and the living tissue outside the holding groove realize separating, realizes the puncture sample.

Preferably, the needle tube unit further comprises a needle tube seat and an elastic element, the needle tube is mounted on the needle tube seat, and two ends of the elastic element are respectively connected with the shell and the needle tube seat so as to apply a force for enabling the needle tube to slide towards the front end of the needle core.

In this scheme, when the needle tubing slides to the rear end and releases the lock, the elastic element provides an effort, makes the needle tubing slide to the front end of nook closing member, need not additionally to exert external force again, easy operation is convenient. Under normal conditions, the needle tube is manually operated to slide backwards, and the needle tube slides forwards under the action force of the elastic element, so that the automatic firing of the biopsy needle is realized.

Preferably, the needle tube unit further comprises a first lock catch, a second lock catch and an unlocking piece, one end of the first lock catch is connected with the shell, the other end of the first lock catch is connected with the second lock catch in a locked mode, one end, away from the first lock catch, of the second lock catch is connected with the needle tube seat, and the unlocking piece is installed in the shell and used for unlocking the locked connection of the first lock catch and the second lock catch.

In the scheme, when the first lock catch is connected with the second lock catch in a locked mode, the needle tube is in a state to be triggered. If the unlocking piece is triggered, the buckling connection of the first lock catch and the second lock catch is unlocked, the needle tube slides forwards under the acting force of the elastic element, and the automatic firing of the biopsy needle is realized.

Preferably, a first inclined surface is arranged on the second lock catch, a second inclined surface matched with the first inclined surface is arranged on the unlocking piece, when the unlocking piece slides forwards, the second inclined surface is abutted to the first inclined surface, and the unlocking piece drives the second lock catch to move in a direction away from the first lock catch.

In this scheme, when promoting the release piece to the front end of nook closing member and sliding, first inclined plane butt in the second inclined plane, the second inclined plane can slide along the extending direction of first inclined plane, makes second hasp keep away from first hasp direction and removes, realizes second hasp and first hasp unblock. Preferably, the unlocking piece has elasticity, and when the unlocking piece is loosened, the unlocking piece is automatically restored to the initial position again, or the unlocking piece is automatically restored to the initial position through the spring, so that the next unlocking operation is facilitated.

Preferably, the unlocking piece can slide along a direction close to or far away from the first lock catch, and when the unlocking piece slides along a direction close to the first lock catch, the unlocking piece abuts against and pushes the first lock catch to move along a direction far away from the second lock catch.

In the scheme, when the unlocking piece is pushed to slide along the direction close to the first lock catch, the unlocking piece pushes the first lock catch to move along the direction far away from the second lock catch, so that the unlocking of the second lock catch and the first lock catch is realized. Preferably, the unlocking piece automatically returns to the initial position through the spring, so that the next unlocking operation is facilitated.

Preferably, when the needle tube slides to the front end of the needle core, the needle tube seat is abutted against the rear side of the abutting part.

In the scheme, the structure is adopted to prevent the needle tube from sliding beyond the setting range of the needle core, and the sliding stroke of the needle tube is synchronously set when the sliding stroke of the needle core is set.

Preferably, the shell is provided with a mounting hole, and the stroke adjusting unit is slidably arranged in the mounting hole and positioned on the shell through a positioning piece;

the travel adjusting unit is provided with a toothed clamping groove, the clamping groove extends along the extending direction of the travel adjusting unit, the positioning piece is slidably arranged on the shell along the direction close to or far away from the clamping groove, and one end of the positioning piece is embedded in the clamping groove.

In this scheme, the clamping groove of profile of tooth is convenient for block in the clamping groove through the setting element, realizes the settlement of the slip stroke of nook closing member. Simultaneously, tooth-shaped clamping grooves are convenient for setting a plurality of strokes, so that the diversified requirements of the strokes are met. Preferably, the positioning piece is provided with a spring, and the spring presses the positioning piece into the clamping groove. When adjusting the stroke adjustment unit, pull out the setting element, then promote stroke adjustment unit back and forth to the position of needs, loosen the setting element, the setting element is in the draw-in groove at the effort card of spring, easy operation is convenient.

On the basis of conforming to the common knowledge in the field, the above preferred conditions can be arbitrarily combined to obtain the preferred examples of the utility model.

The utility model has the positive progress effects that: the biopsy needle is provided with the stroke adjusting unit, the position of the stroke adjusting unit along the front and back direction of the shell is adjustable, the firing stroke of the needle core unit is correspondingly adjusted, the selectivity of the firing stroke of the needle core unit is greatly increased, the sampling stroke is flexibly set during biopsy sampling, the operation is convenient, and the two requirements of sampling quantity and safety are simultaneously met.

Drawings

Fig. 1 is a schematic view showing the structure of a biopsy needle according to embodiment 1 of the present utility model.

Fig. 2 is a schematic view showing the structure of a receiving groove of a needle tube covering a core of a biopsy needle according to embodiment 1 of the present utility model.

Fig. 3 is a schematic partial structure of the first lock catch, the second lock catch and the unlocking member according to embodiment 1 of the present utility model.

Fig. 4 is a schematic structural view of a biopsy needle according to embodiment 2 of the present utility model.

Fig. 5 is a schematic partial structure of the first lock catch, the second lock catch and the unlocking member according to embodiment 2 of the present utility model.

Reference numerals illustrate:

shell 1

Needle core unit 2

Needle core 21

Accommodation groove 211

Needle core seat 22

Handle 221

Connecting rod 23

Abutment portion 24

Stroke adjusting unit 3

Clamping groove 31

Needle tube unit 4

Needle tube 41

Needle holder 42

Elastic element 43

First shackle 44

Second lock catch 45

First inclined surface 451

Unlocking piece 46

Second inclined surface 461

Positioning piece 5

Front-rear direction 100

Front end 101

Rear end 102

Detailed Description

The utility model will now be more fully described by way of example only and with reference to the accompanying drawings, but the utility model is not thereby limited to the scope of the examples described.

Example 1

As shown in fig. 1 to 3, the present embodiment discloses a biopsy needle including a housing 1, a core unit 2, and a stroke adjusting unit 3, the core unit 2 is slidably provided inside the housing 1, the stroke adjusting unit 3 is mounted at a front end 101 of the housing 1, the position of the stroke adjusting unit 3 in a front-rear direction 100 of the housing 1 is adjustable, and the firing stroke of the core unit 2 is adjusted by adjusting the position of the stroke adjusting unit 3.

In this embodiment, install stroke adjustment unit 3 on this biopsy needle, stroke adjustment unit 3 is adjustable along the position of the fore-and-aft direction 100 of casing 1, adjusts the percussion stroke of the core unit 2 correspondingly, greatly increased the selectivity of core unit 2 percussion stroke, when making the biopsy sample, nimble setting sampling stroke, convenient operation to satisfy two demands of sample volume and security simultaneously.

As shown in fig. 1, the core unit 2 includes a core 21, a core seat 22, and a connecting rod 23, the core 21 is mounted on the core seat 22, the connecting rod 23 is provided to extend in the extending direction of the core 21, one end of the connecting rod 23 is connected to the core seat 22, the other end of the connecting rod 23 is connected to an abutting portion 24, and one side of the abutting portion 24 away from the connecting rod 23 can abut against the stroke adjusting unit 3. Since one end of the needle 21 is connected to the needle seat 22 and one end of the connecting rod 23 is also connected to the needle seat 22, the needle 21, the needle seat 22 and the connecting rod 23 slide synchronously, and when the needle 21 slides forward until the abutting portion 24 of the connecting rod 23 abuts against the stroke adjusting unit 3, the stroke adjusting unit 3 prevents the needle 21 from sliding forward through the abutting portion 24, the connecting rod 23 and the needle seat 22, thereby limiting the sliding stroke of the needle 21, and correspondingly increasing the flexibility of the stroke adjustment of the needle 21 since the stroke adjusting unit 3 can be adjusted in the position of the front-rear direction 100 of the housing 1.

In order to facilitate the doctor to push and pull the needle 21, the end of the needle seat 22 away from the needle 21 is provided with a handle 221.

As shown in fig. 1 and 2, the biopsy needle further includes a needle tube unit 4, the needle tube unit 4 includes a needle tube 41, the needle tube 41 is sleeved outside the needle core 21 and can slide relative to the needle core 21, a containing groove 211 is provided on the outer circumferential surface of the front end 101 of the needle core 21, and when the needle tube 41 slides to the front end 101 of the needle core 21, the needle tube 41 covers the containing groove 211. The accommodating groove 211 on the needle core 21 is used for accommodating living tissues when the needle core 21 is inserted into a focus, the needle tube 41 is used for cutting the living tissues when sliding to the front end 101 of the needle core 21, and the living tissues in the accommodating groove 211 are separated from the living tissues outside the accommodating groove 211, so that puncture sampling is realized.

As shown in fig. 1, the needle unit 4 further includes a needle holder 42 and an elastic member 43, the needle 41 is mounted to the needle holder 42, and both ends of the elastic member 43 are connected to the housing 1 and the needle holder 42, respectively, to apply a force for sliding the needle 41 toward the front end 101 of the needle 21. When the needle tube 41 slides to the rear end 102 and is unlocked, the elastic element 43 provides an acting force to enable the needle tube 41 to slide to the front end 101 of the needle core 21, no external force is required to be applied, and the operation is simple and convenient. Typically, the needle tube 41 is manually operated to slide rearward, and the needle tube 41 slides forward under the force of the elastic member 43, achieving automatic firing of the biopsy needle. In the present embodiment, the elastic member 43 is a compression spring.

In this embodiment, a slide rail mechanism is provided between the core print seat and the housing to realize sliding of the core print seat in the housing. A sliding rail mechanism is also arranged between the needle tube seat and the shell so as to realize the sliding of the needle tube seat in the shell.

As shown in fig. 1 and 3, the needle unit 4 further includes a first latch 44, a second latch 45, and an unlocking member 46, one end of the first latch 44 is connected to the housing 1, the other end of the first latch 44 is connected to the second latch 45, one end of the second latch 45 away from the first latch 44 is connected to the needle holder 42, and the unlocking member 46 is mounted to the housing 1 and is used for unlocking the latch connection of the first latch 44 and the second latch 45. When the first lock catch 44 is connected to the second lock catch 45 in a locked mode, the needle tube 41 is in a cocked state. If the unlocking piece 46 is triggered to unlock the buckling connection of the first lock catch 44 and the second lock catch 45, the needle tube 41 slides forward under the acting force of the elastic element 43, so that the automatic firing of the biopsy needle is realized.

As shown in fig. 1 and 3, the second lock catch 45 is provided with a first inclined surface 451, the unlocking member 46 is provided with a second inclined surface 461 which is matched with the first inclined surface 451, and when the unlocking member 46 slides forwards, the second inclined surface 461 abuts against the first inclined surface 451, and the unlocking member 46 drives the second lock catch 45 to move in a direction away from the first lock catch 44. When the unlocking member 46 is pushed to slide toward the front end 101 of the needle 21, the first inclined surface 451 abuts against the second inclined surface 461, and since the upper end of the first inclined surface 451 is inclined forward, the second inclined surface 461 slides downward along the first inclined surface 451, so that the second lock catch 45 moves away from the first lock catch 44, and the second lock catch 45 is unlocked from the first lock catch 44. Preferably, the unlocking member 46 has elasticity, and when the unlocking member 46 is released, the unlocking member 46 automatically returns to the initial position, or the unlocking member 46 automatically returns to the initial position through a spring, so that the next unlocking operation is facilitated.

When the needle tube 41 slides to the tip 101 of the needle 21, the needle tube seat 42 abuts against the rear side of the abutment 24, preventing the needle tube 41 from sliding beyond the set range of the needle 21. After the position of the stroke adjusting unit 3 is set, the sliding stroke of the needle 21 is set, and meanwhile, the sliding stroke of the needle tube 41 is set, so that the sliding strokes of the needle 21 and the needle tube 41 do not need to be set one by one, and the operation is simple and convenient.

As shown in fig. 1, the housing 1 is provided with a mounting hole, and the stroke adjusting unit 3 is slidably provided in the mounting hole and positioned in the housing 1 by the positioning member 5. The travel adjusting unit 3 is provided with a tooth-shaped clamping groove 31, the clamping groove 31 extends along the extending direction of the travel adjusting unit 3, the positioning piece 5 is slidably arranged on the shell 1 along the direction close to or far away from the clamping groove 31, and one end part of the positioning piece 5 is clamped on the clamping groove 31. The setting of the sliding travel of the needle core 21 is realized by the positioning piece 5 being clamped in the tooth-shaped clamping groove 31. Meanwhile, since the tooth-shaped clamping groove 31 is provided with a plurality of teeth, a plurality of strokes can be correspondingly arranged to meet the diversified requirements of the strokes. Preferably, a spring is mounted on the positioning member 5, and the spring presses the positioning member 5 into the clamping groove 31. When the stroke adjusting unit 3 is adjusted, the positioning piece 5 is pulled out, then the stroke adjusting unit 3 is pushed to a required position along the front-back direction 100, the positioning piece 5 is loosened, and the positioning piece 5 is clamped in the clamping groove 31 under the action force of the spring, so that the operation is simple and convenient.

When the biopsy needle is in the loaded state, the accommodating groove 211 on the needle core 21 is covered by the needle tube 41 (as shown in fig. 2), and meanwhile, the second lock catch 45 at the proximal end of the needle holder 42 is in locking connection with the first lock catch 44 connected to the housing 1. At this time, the puncture can be performed to puncture the tip of the needle 21 to a position near the target point. Then, when the grip 221 at the proximal end of the core print 22 is pushed, the core 21 moves forward with the core print 22, and exposes a part of the accommodation groove 211 to the outside of the needle tube 41. At this time, the tissue at the target point enters the accommodating groove 211, and when the needle core 21 has reached the proper position, the stroke adjusting unit 3 is pushed, and the rear side of the stroke adjusting unit 3 is brought into contact with the abutting part 24 of the connecting rod 23; at this time, the retainer 5 on the housing 1 locks the stroke adjustment unit 3, so that the sliding stroke of the abutment 24 of the connecting rod 23 is set. Subsequently, by pushing the unlocking member 46 toward the front end 101 of the needle 21, the second lock catch 45 on the needle tube seat 42 is disengaged from the first lock catch 44 connected to the housing 1, and under the action of the elastic element 43, the needle tube seat 42 drives the needle tube 41 to move forward, so that the tissue is cut.

Example 2

As shown in fig. 4 and 5, this embodiment is substantially the same as embodiment 1 except that: the unlocking piece 46 can slide along the direction close to or far away from the first lock catch 44, and when the unlocking piece 46 slides along the direction close to the first lock catch 44, the unlocking piece 46 abuts against and pushes the first lock catch 44 to move along the direction far away from the second lock catch 45, so that the second lock catch 45 and the first lock catch 44 are unlocked. That is, after the firing stroke is set, the unlocking member 46 is pressed to disengage the second lock catch 45 on the needle tube seat 42 from the first lock catch 44 connected to the housing 1, and the needle tube seat 42 drives the needle tube 41 to move forward under the action of the elastic element 43, so as to cut tissue. Preferably, the unlocking piece 46 is provided with a spring, and the unlocking piece 46 automatically returns to the initial position through the spring, so that the next unlocking operation is facilitated.

In the description herein, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate describing the utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the utility model.

While specific embodiments of the utility model have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and the scope of the utility model is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the utility model, but such changes and modifications fall within the scope of the utility model.

Claims (9)

1. The biopsy needle is characterized by comprising a shell, a needle core unit and a stroke adjusting unit, wherein the needle core unit is arranged in the shell in a sliding mode, the stroke adjusting unit is arranged at the front end of the shell, the position of the stroke adjusting unit in the front-back direction of the shell is adjustable, and the firing stroke of the needle core unit is adjusted by adjusting the position of the stroke adjusting unit;

the needle core unit comprises a needle core, a needle core seat and a connecting rod, wherein the needle core is arranged on the needle core seat, the connecting rod extends along the extending direction of the needle core, one end of the connecting rod is connected with the needle core seat, the other end of the connecting rod is connected with an abutting part, and one side, far away from the connecting rod, of the abutting part can be abutted with the stroke adjusting unit.

2. The biopsy needle of claim 1, wherein an end of the cartridge remote from the needle core is provided with a grip.

3. The biopsy needle of claim 1, further comprising a needle tube unit comprising a needle tube, wherein the needle tube is sleeved outside the needle core and can slide relative to the needle core, a containing groove is formed in the outer peripheral surface of the front end of the needle core, and the needle tube covers the containing groove when the needle tube slides to the front end of the needle core.

4. A biopsy needle according to claim 3, wherein the needle cannula unit further comprises a needle hub to which the needle cannula is mounted and a resilient member having opposite ends connected to the housing and the needle hub, respectively, for exerting a force to slide the needle cannula towards the front end of the needle core.

5. The biopsy needle of claim 4, wherein the needle cannula unit further comprises a first lock, a second lock, and an unlocking member, wherein one end of the first lock is connected to the housing, the other end of the first lock is connected to the second lock, the end of the second lock remote from the first lock is connected to the needle hub, and the unlocking member is mounted to the housing and is configured to unlock the snap connection of the first lock and the second lock.

6. The biopsy needle of claim 5, wherein the second lock catch is provided with a first inclined surface, the unlocking member is provided with a second inclined surface matched with the first inclined surface, the second inclined surface is abutted against the first inclined surface when the unlocking member slides forwards, and the unlocking member drives the second lock catch to move in a direction away from the first lock catch.

7. The biopsy needle of claim 5, wherein the release member is slidable in a direction toward or away from the first lock, wherein the release member abuts and urges the first lock to move in a direction away from the second lock when the release member is slid in a direction toward the first lock.

8. The biopsy needle of claim 4, wherein the needle cannula seat abuts a rear side of the abutment when the needle cannula is slid to the forward end of the needle core.

9. The biopsy needle of any one of claims 1-8, wherein the housing has a mounting aperture disposed therein, wherein the stroke adjustment unit is slidably disposed in the mounting aperture and is positioned in the housing by a positioning member;

the travel adjusting unit is provided with a toothed clamping groove, the clamping groove extends along the extending direction of the travel adjusting unit, the positioning piece is slidably arranged on the shell along the direction close to or far away from the clamping groove, and one end part of the positioning piece is clamped in the clamping groove.