CN113907802B - Full-automatic biopsy needle capable of preventing false triggering - Google Patents
Full-automatic biopsy needle capable of preventing false triggering Download PDFInfo
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- CN113907802B CN113907802B CN202111000964.2A CN202111000964A CN113907802B CN 113907802 B CN113907802 B CN 113907802B CN 202111000964 A CN202111000964 A CN 202111000964A CN 113907802 B CN113907802 B CN 113907802B
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- 238000001574 biopsy Methods 0.000 title claims abstract description 107
- 238000005070 sampling Methods 0.000 claims abstract description 47
- 238000004804 winding Methods 0.000 claims abstract description 25
- 230000007246 mechanism Effects 0.000 claims abstract description 22
- 238000010304 firing Methods 0.000 claims description 37
- 238000003825 pressing Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 9
- 230000001960 triggered effect Effects 0.000 abstract description 16
- 238000002360 preparation method Methods 0.000 abstract description 15
- 230000009471 action Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 206010064912 Malignant transformation Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 201000011510 cancer Diseases 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000036212 malign transformation Effects 0.000 description 1
- 210000005036 nerve Anatomy 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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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
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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
- A61B2010/0208—Biopsy devices with actuators, e.g. with triggered spring mechanisms
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Medical Informatics (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Pathology (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention discloses a full-automatic biopsy needle capable of preventing false triggering, after an operator controls the full-automatic biopsy needle to enter a to-be-triggered state through a winding triggering mechanism, a safety lock tongue can be moved to a locking position first, so that the full-automatic biopsy needle enters a safety locking state, namely: the bumper is abutted against the upper end face of the side plate part by the safety lock tongue, so that the upper chord key of the inner needle, the outer needle seat and the inner needle seat are limited not to move upwards; therefore, the sampling outer needle and the sampling inner needle are ensured not to pop up due to slight vibration generated by temporary placement on an operating table or misoperation of an operator under the safe locking state, false triggering is prevented, the requirement that the operator can perform preparation work in a preparation time period before formally triggering the full-automatic biopsy needle to sample the living tissue after winding the full-automatic biopsy needle to a to-be-triggered state is met, and the situation that the full-automatic biopsy needle is accidentally injured or damaged and cannot be used due to false triggering in the preparation time period is avoided.
Description
Technical Field
The invention relates to a medical instrument for biopsy, in particular to a full-automatic biopsy needle capable of preventing false triggering.
Background
For diagnosis and treatment of malignant tumors, analyzing the biopsy condition of other tissues before malignant transformation of the tissues, and how to relieve the pain of patients to the greatest extent, safely, rapidly and at low cost, taking out target tissues from the body is a long-term research field.
Percutaneous aspiration biopsy, i.e., a single-use biopsy needle that enters human target tissue through a small incision and cuts a tissue specimen for examination and analysis, has significant advantages over other known sampling techniques: the recovery time of the patient is short, the pain is small, the operation time is short, the cost is low, the risk of adjacent infection is low, the damage to the patient is small, and the damage to adjacent body tissues such as nerves is reduced.
The biopsy sample acquisition modes of biopsy needle products commonly used in the current market can be divided into: aspiration biopsy needle, incising biopsy needle, and aspiration incising biopsy needle. The most widely applied range and the most mature performance are cut biopsy needles.
The biopsy needle can be used in the following ways: a manual biopsy needle; motorized assembly biopsy needle; motorized integrated biopsy needle.
Principle of operation of a cutting motorized integrated biopsy needle product: the two keys are used for respectively carrying out the winding action of the inner needle and the outer needle, namely, the inner needle and the outer needle are respectively locked into a state to be triggered. When in firing, the inner needle firstly performs firing and puncturing to the position to be sampled, and the sampling groove at the front end of the inner needle reaches the sampling position. Then the inner needle automatically triggers the outer needle to fire, the outer needle is a tubular front part with a cutting blade body, and the inner needle sampling groove part is axially cut for realizing automatic sampling.
The problems of the current cutting type motorized integrated biopsy needle product are that:
since biopsy needles often do not cut through the sample immediately after winding, the operator also needs to perform some preparation after winding to before sampling. However, after the biopsy needle is in a winding state, even if the firing action is not performed, the operator is accidentally fired due to slight vibration generated by the product in the taking and placing process, such as temporary placement on an operating table, so that the operator is accidentally injured, or the biopsy needle is damaged and cannot be used.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: provided is a fully automatic biopsy needle capable of preventing false triggering.
The technical scheme adopted by the invention is as follows:
the utility model provides a can prevent full-automatic biopsy needle of mistake triggering, includes biopsy needle casing, sample outer needle, sample inner needle, outer needle file, inner needle file and last string firing mechanism, outer needle file and inner needle file are in along upper and lower direction slidable mounting respectively in the biopsy needle casing, sample outer needle suit is outside the sample inner needle, the lower extreme of sample outer needle and the lower extreme of sample inner needle respectively with outer needle file and inner needle file fixed connection, the upper end of sample outer needle and the upper end of sample inner needle all stretch out outside the biopsy needle casing; referring to fig. 4, the winding firing mechanism can control the fully automatic biopsy needle to enter a to-be-fired state, so that the outer needle seat and the inner needle seat are respectively positioned at respective lower limit positions; referring to fig. 3, the upper chord firing mechanism can fire the outer needle seat and the inner needle seat to pop up under the condition of waiting for firing so as to sample the living tissue;
the method is characterized in that:
the upper chord firing mechanism comprises an inner needle upper chord key formed by sequentially connecting a pressing part, a connecting part and a side plate part, wherein the upper end of the side plate part is positioned above the outer needle seat and the inner needle seat, the lower end of the side plate part extends to a gap between the inner needle seat and the biopsy needle shell and is fixedly connected with the inner needle seat, the connecting part avoids the sampling outer needle, and the pressing part is exposed on the surface of the biopsy needle shell; such that: the operator can drive the inner needle seat to move downwards to the lower limit position by downwards pressing the pressing part of the upper chordal key of the inner needle.
Referring to fig. 7, the fully automatic biopsy needle further comprises a safety lock tongue, wherein the safety lock tongue comprises a sliding block, a bumper is arranged at the front part of the inner side surface of the sliding block, and a clearance gap is formed at the rear part of the inner side surface of the sliding block; the sliding block is in sliding fit with the biopsy needle shell, so that the safety lock tongue can move between a locking position and an unlocking position along the front-back direction; when the outer needle seat and the inner needle seat are at the respective lower limit positions and the safety lock tongue moves to the locking position, the bumper abuts against the upper end face of the side plate part to lock the side plate part of the inner needle upper chord key of the safety lock tongue, so that the inner needle upper chord key, the outer needle seat and the inner needle seat are limited not to move upwards; when the safety lock tongue moves to the unlocking position, the side plate part can move up and down through the clearance gap, so that the safety lock tongue is released to lock the side plate part.
Therefore, after the operator controls the full-automatic biopsy needle to enter the to-be-triggered state shown in fig. 4 through the winding trigger mechanism, the safety lock tongue can be moved to the locking position shown in fig. 5, so that the full-automatic biopsy needle enters the safety locking state shown in fig. 6, namely: the bumper is propped against the upper end surface of the side plate part by the safety lock tongue, so that the upper chord key of the inner needle, the outer needle seat and the inner needle seat are limited not to move upwards; therefore, the sampling outer needle and the sampling inner needle are ensured not to pop up due to slight vibration or misoperation of an operator when being temporarily placed on an operating table in a safe locking state, false triggering is prevented, the requirement that the operator can perform preparation work in a preparation time period before formally triggering the full-automatic biopsy needle to perform biopsy after winding the full-automatic biopsy needle to a to-be-triggered state is met, and the situation that the full-automatic biopsy needle is accidentally injured or damaged and cannot be used due to false triggering in the preparation time period is avoided.
Wherein the biopsy needle housing is preferably designed as a handle shape suitable for being gripped by an operator.
Preferably: referring to fig. 7, the front end of the safety lock tongue is provided with a locking end limiting block, and the rear end of the safety lock tongue is provided with an unlocking end limiting block, so that the safety lock tongue is limited not to be separated from the biopsy needle shell, and an operator is convenient to move the safety lock tongue.
As a preferred embodiment of the present invention: the upper chord firing mechanism further comprises an outer needle seat buckling and locking plate and an inner needle seat buckling and locking plate which are fixed in the biopsy needle shell, and a firing key which is arranged at the lower end part of the biopsy needle shell in an up-down sliding manner, wherein the outer needle seat, the outer needle seat buckling and locking plate, the inner needle seat buckling and locking plate and the firing key are sequentially arranged from top to bottom; the lower part of the outer needle seat is provided with an outer needle seat buckle, an outer needle seat spring is arranged between the outer needle seat and the outer needle seat buckle locking plate, and when the outer needle seat moves to the lower limit position, the outer needle seat buckle is clamped in the buckle hole of the outer needle seat buckle locking plate; the lower part of the inner needle seat is provided with an inner needle seat buckle, an inner needle seat spring is arranged between the inner needle seat and the inner needle seat buckle locking plate, and when the inner needle seat moves to the lower limit position, the inner needle seat buckle is clamped in the buckle hole of the inner needle seat buckle locking plate.
Preferably: the top surface of the firing key is provided with a first guide groove for guiding the inner needle seat buckle to shrink inwards so that: when the firing key moves upwards to the inner needle seat buckle extruded to the inner needle seat, the first guide groove can guide the inner needle seat buckle to shrink inwards to deform, so that the inner needle seat buckle can be separated from the buckling hole of the inner needle seat buckling locking plate more easily.
Preferably: the top surface of interior needle file is equipped with and is used for guiding the second guide way of outer needle file buckle inwards shrink deformation to make: when the inner needle seat moves upwards to collide with the outer needle seat buckle of the outer needle seat, the second guide groove can guide the outer needle seat buckle to shrink inwards to deform, so that the outer needle seat buckle can be separated from the buckling hole of the outer needle seat buckling locking plate more easily.
Preferably: the full-automatic biopsy needle further comprises an outer needle upper chord key, the lower end of the outer needle upper chord key is fixedly connected with the outer needle seat, and the upper end of the outer needle upper chord key is exposed out of the surface of the biopsy needle shell, so that the outer needle seat is driven to move downwards by the outer needle upper chord key, and the outer needle is sampled to be wound.
Thus, the working principle of the invention is as follows:
first, as shown in fig. 2 and 3, before using the fully automatic biopsy needle of the present invention, the safety lock tongue is moved to the unlocking position so that the safety lock tongue does not obstruct the up-and-down movement of the inner needle upper key.
Secondly, as shown in fig. 4, the fully automatic biopsy needle is wound to a cocked state by a winding firing mechanism, and the winding process has two modes:
in the first mode, the outer needle seat is driven to move downwards to the lower limit position by pressing the outer needle upper chord key, so that the outer needle seat is clamped in the buckling hole of the outer needle seat buckling and locking plate, the upper chord of the outer needle for sampling is realized, and the inner needle seat is driven to move downwards to the lower limit position by pressing the inner needle upper chord key, so that the inner needle seat is clamped in the buckling hole of the inner needle seat buckling and locking plate, and the upper chord of the inner needle for sampling is realized.
The second mode is that the upper chord key of the inner needle can be directly pressed, the inner needle seat is driven to move downwards through the side plate part, and the outer needle seat is driven to move downwards through the connecting part, so that the upper chord of the sampling outer needle and the sampling inner needle can be realized simultaneously; however, the force required for winding is relatively large in the second mode, and winding is generally performed in the first mode.
Wherein, in the state of waiting to fire, outer needle file spring and interior needle file spring are compressed.
Then, as shown in fig. 5 and 6, the safety lock tongue is moved to the locking position, so that the full-automatic biopsy needle enters the safety locking state, the sampling outer needle and the sampling inner needle are ensured not to be ejected upwards due to slight vibration or misoperation of an operator when being temporarily placed on an operating table in the safety locking state, false triggering is prevented, an operator can be relieved to prepare the biopsy needle in time, and the situation that the full-automatic biopsy needle accidentally hurts the operator or is damaged and cannot be used due to false triggering is avoided.
Finally, as shown in fig. 4, after the preparation is completed, when the biopsy sampling is performed, the safety lock tongue is firstly moved to the unlocking position again, so that the full-automatic biopsy needle is restored to a to-be-triggered state, and then the trigger key is pressed down, so that the outer needle seat and the inner needle seat can be triggered to pop up, and the biopsy sampling of the patient is realized, and the specific trigger process is as follows: the firing key upwards extrudes the inner needle seat buckle of the inner needle seat, so that the inner needle seat buckle is separated from the buckling hole of the inner needle seat buckling locking plate; under the action of the spring force of the inner needle seat spring, the inner needle seat and the sampling inner needle are driven to move upwards, and the sampling inner needle is firstly triggered to pop up; when the inner needle seat moves upwards to strike the outer needle seat buckle of the outer needle seat, the outer needle seat buckle is separated from the buckle hole of the outer needle seat buckle locking plate; under the action of the spring force of the outer needle seat spring, the outer needle seat and the sampling outer needle are driven to move upwards, and the sampling outer needle is automatically triggered to pop up.
Compared with the prior art, the invention has the following beneficial effects:
firstly, the invention is provided with the inner needle winding key and the safety lock tongue, after an operator controls the full-automatic biopsy needle to enter a to-be-triggered state through the winding trigger mechanism, the safety lock tongue can be moved to a locking position, so that the full-automatic biopsy needle enters a safety locking state, namely: the bumper is propped against the upper end surface of the side plate part by the safety lock tongue, so that the upper chord key of the inner needle, the outer needle seat and the inner needle seat are limited not to move upwards; therefore, the sampling outer needle and the sampling inner needle are ensured not to pop up due to slight vibration or misoperation of an operator when being temporarily placed on an operating table in a safe locking state, false triggering is prevented, the requirement that the operator can perform preparation work in a preparation time period before formally triggering the full-automatic biopsy needle to perform biopsy after winding the full-automatic biopsy needle to a to-be-triggered state is met, and the situation that the full-automatic biopsy needle is accidentally injured or damaged and cannot be used due to false triggering in the preparation time period is avoided.
Second, the winding firing mechanism adopted by the invention has the advantages of high structural reliability and convenient use.
Drawings
The invention is described in further detail below with reference to the attached drawings and to specific examples:
FIG. 1 is a schematic view of the structure of a fully automatic biopsy needle of the present invention;
FIG. 2 is a schematic view of the safety lock tongue in an unlocked position;
FIG. 3 is a schematic cross-sectional view of the present invention before and after use;
FIG. 4 is a schematic cross-sectional view of the present invention in a cocked state;
FIG. 5 is a schematic view of the safety tongue of the present invention in a locked position;
FIG. 6 is a schematic cross-sectional view of the present invention in a fail-safe locked state;
fig. 7 is a schematic structural view of the security bolt of the present invention.
Detailed Description
The present invention will be described in detail with reference to the following examples and the accompanying drawings to help those skilled in the art to better understand the inventive concept of the present invention, but the scope of the claims of the present invention is not limited to the following examples, and it is intended that those skilled in the art will not make any other examples of the inventive concept without departing from the scope of the inventive concept of the present invention.
In the description of the present invention, it should be clearly understood that the terms "upper, lower, front, rear" and "orientation" are merely relative terms in orientation, which are used for convenience in describing the present invention or simplifying the description, and do not indicate or imply a specific orientation that the present invention must have, and thus should not be construed as limiting the present invention.
Example 1
As shown in fig. 1 to 7, the invention discloses a full-automatic biopsy needle capable of preventing false triggering, which comprises a biopsy needle housing 1, a sampling outer needle 2, a sampling inner needle 3, an outer needle seat 4, an inner needle seat 5 and an upper chord firing mechanism, wherein the outer needle seat 4 and the inner needle seat 5 are respectively arranged in the biopsy needle housing 1 in a sliding manner along the up-down direction, the sampling outer needle 2 is sleeved outside the sampling inner needle 3, the lower end of the sampling outer needle 2 and the lower end of the sampling inner needle 3 are respectively fixedly connected with the outer needle seat 4 and the inner needle seat 5, and the upper end of the sampling outer needle 2 and the upper end of the sampling inner needle 3 are respectively extended out of the biopsy needle housing 1; referring to fig. 4, the winding firing mechanism can control the fully automatic biopsy needle to enter a to-be-fired state, so that the outer needle seat 4 and the inner needle seat 5 are respectively positioned at the lower limit positions; referring to fig. 3, the upper chord firing mechanism can fire the outer needle seat 4 and the inner needle seat 5 to pop up under the condition of waiting for firing so as to sample living tissues;
the method is characterized in that:
the upper chord firing mechanism comprises an inner needle upper chord key 6 formed by sequentially connecting a pressing part 6-1, a connecting part 6-2 and a side plate part 6-3, wherein the upper end of the side plate part 6-3 is positioned above the outer needle seat 4 and the inner needle seat 5, the lower end of the side plate part 6-3 extends to a gap between the inner needle seat 5 and the biopsy needle shell 1 and is fixedly connected with the inner needle seat 5, the connecting part 6-2 avoids the sampling outer needle 2, and the pressing part 6-1 is exposed on the surface of the biopsy needle shell 1; such that: the operator can drive the inner needle holder 5 to move down to its lower limit position by pressing down the pressing portion 6-1 of the inner needle upper chordal key 6.
Referring to fig. 7, the fully automatic biopsy needle further comprises a safety lock tongue 7, wherein the safety lock tongue 7 comprises a sliding block 7-1, a bumper 7-2 is arranged at the front part of the inner side surface of the sliding block 7-1, and a clearance gap 7-1a is formed at the rear part of the inner side surface of the sliding block 7-1; the sliding block 7-1 is in sliding fit with the biopsy needle housing 1, so that the safety lock tongue 7 can move between a locking position and an unlocking position along the front-back direction; when the outer needle seat 4 and the inner needle seat 5 are at the respective lower limit positions and the safety lock tongue 7 moves to the locking position, the bumper 7-2 is propped against the upper end surface of the side plate part 6-3, so that the safety lock tongue 7 locks the side plate part 6-3 of the inner needle upper chord key 6, and the inner needle upper chord key 6, the outer needle seat 4 and the inner needle seat 5 are limited from moving upwards; when the safety lock tongue 7 moves to the unlocking position, the side plate part 6-3 can move up and down through the clearance gap 7-1a, so that the safety lock tongue 7 releases the locking of the side plate part 6-3.
Therefore, after the operator controls the full-automatic biopsy needle of the invention to enter the to-be-cocked state shown in fig. 4 through the winding firing mechanism, the safety lock tongue 7 can be moved to the locking position shown in fig. 5, so that the full-automatic biopsy needle of the invention enters the safety locking state shown in fig. 6, namely: the bumper 7-2 is propped against the upper end surface of the side plate part 6-3 by the safety lock tongue 7, so that the upper chord key 6 of the inner needle, the outer needle seat 4 and the inner needle seat 5 are limited from moving upwards; therefore, the sampling outer needle 2 and the sampling inner needle 3 are ensured not to pop up due to slight vibration generated when temporarily placed on an operating table or misoperation of an operator in a safety locking state, false triggering is prevented, the requirement that the operator can perform preparation work at ease in a preparation time period before formally triggering the full-automatic biopsy needle to sample the living tissue after winding the full-automatic biopsy needle to a to-be-triggered state is met, and the situation that the full-automatic biopsy needle is accidentally injured or damaged and cannot be used due to false triggering in the preparation time period is avoided.
Wherein the biopsy needle housing 1 is preferably designed as a handle shape suitable for being gripped by an operator.
The foregoing is a basic implementation of the first embodiment, and further optimization, improvement and limitation may be performed based on the basic implementation:
preferably: referring to fig. 7, the front end of the safety lock tongue 7 is provided with a locking end limiting block 7-3, and the rear end of the safety lock tongue 7 is provided with an unlocking end limiting block 7-4, so as to limit the safety lock tongue 7 not to be separated from the biopsy needle casing 1, and facilitate the operator to move the safety lock tongue 7.
Example two
In addition to the first embodiment, the second embodiment also adopts the following preferred embodiments:
the upper chord firing mechanism further comprises an outer needle seat buckling and locking plate 8 and an inner needle seat buckling and locking plate 9 which are fixed in the biopsy needle shell 1, and a firing key 10 which is arranged at the lower end part of the biopsy needle shell 1 in an up-down sliding manner, wherein the outer needle seat 4, the outer needle seat buckling and locking plate 8, the inner needle seat 5, the inner needle seat buckling and locking plate 9 and the firing key 10 are sequentially arranged from top to bottom; an outer needle seat buckle 4-1 is arranged at the lower part of the outer needle seat 4, an outer needle seat spring 11 is arranged between the outer needle seat 4 and the outer needle seat buckle locking plate 8, and when the outer needle seat 4 moves to the lower limit position, the outer needle seat buckle 4-1 is clamped in a buckle hole 8a of the outer needle seat buckle locking plate 8; the lower part of the inner needle seat 5 is provided with an inner needle seat buckle 5-1, an inner needle seat spring 12 is arranged between the inner needle seat 5 and the inner needle seat buckle locking plate 9, and when the inner needle seat 5 moves to the lower limit position, the inner needle seat buckle 5-1 is clamped in a buckle hole 9a of the inner needle seat buckle locking plate 9.
The foregoing is a basic implementation manner of the second embodiment, and further optimization, improvement and limitation may be performed based on the basic implementation manner:
preferably: the top surface of the firing key 10 is provided with a first guiding groove 10a for guiding the inner needle seat buckle 5-1 to shrink and deform inwards, so that: when the firing key 10 moves upwards to the inner needle seat buckle 5-1 extruded to the inner needle seat 5, the first guide groove 10a can guide the inner needle seat buckle 5-1 to shrink inwards to deform, so that the inner needle seat buckle 5-1 can be separated from the buckling hole 9a of the inner needle seat buckling locking plate 9 more easily.
Preferably: the top surface of the inner needle seat 5 is provided with a second guiding groove 5a for guiding the outer needle seat buckle 4-1 to shrink and deform inwards, so that: when the inner needle seat 5 moves upwards to collide with the outer needle seat buckle 4-1 of the outer needle seat 4, the second guide groove 5a can guide the outer needle seat buckle 4-1 to shrink inwards to deform, so that the outer needle seat buckle 4-1 can be separated from the buckling hole 8a of the outer needle seat buckling locking plate 8 more easily.
Preferably: the full-automatic biopsy needle further comprises an outer needle upper chord key 13, the lower end of the outer needle upper chord key 13 is fixedly connected with the outer needle seat 4, and the upper end of the outer needle upper chord key 13 is exposed out of the surface of the biopsy needle shell 1, so that the outer needle upper chord key 13 is used for driving the outer needle seat 4 to move downwards, and the upper chord of the sampling outer needle 2 is realized.
Thus, the working principle of the invention is as follows:
first, as shown in fig. 2 and 3, before using the full-automatic biopsy needle of the present invention, the safety lock tongue 7 is moved to the unlocking position so that the safety lock tongue 7 does not obstruct the up-and-down movement of the inner needle up-chord key 6.
Secondly, as shown in fig. 4, the fully automatic biopsy needle is wound to a cocked state by a winding firing mechanism, and the winding process has two modes:
in the first mode, the outer needle seat 4 is driven to move downwards to the lower limit position by pressing the outer needle upper chord key 13, so that the outer needle seat buckle 4-1 is clamped in the buckling hole 8a of the outer needle seat buckling and locking plate 8, the upper chord of the outer needle 2 is realized, and then the inner needle seat 5 is driven to move downwards to the lower limit position by pressing the inner needle upper chord key 6, so that the inner needle seat buckle 5-1 is clamped in the buckling hole 9a of the inner needle seat buckling and locking plate 9, and the upper chord of the inner needle 3 is realized.
In the second mode, the upper chord key 6 of the inner needle can be directly pressed, the inner needle seat 5 is driven to move downwards through the side plate part 6-3, and the outer needle seat 4 is driven to move downwards through the connecting part 6-2, so that the upper chords of the sampling outer needle 2 and the sampling inner needle 3 are realized at the same time; however, the force required for winding is relatively large in the second mode, and winding is generally performed in the first mode.
Wherein the outer needle seat spring 11 and the inner needle seat spring 12 are compressed in the cocked state.
Then, as shown in fig. 5 and 6, the safety lock tongue 7 is moved to the locking position, so that the full-automatic biopsy needle enters the safety locking state, the sampling outer needle 2 and the sampling inner needle 3 are ensured not to be ejected upwards due to slight vibration generated by temporary placement on an operating table or misoperation of an operator in the safety locking state, false triggering is prevented, the operator can be relieved to prepare in time, and the situation that the full-automatic biopsy needle accidentally damages the operator or is damaged and cannot be used due to false triggering is avoided.
Finally, as shown in fig. 4, when sampling the living tissue after the preparation is completed, the safety lock tongue 7 is moved to the unlocking position again, so that the fully automatic biopsy needle is restored to the to-be-triggered state, and then the trigger key 10 is pressed down, so that the outer needle seat 4 and the inner needle seat 5 can be triggered to pop up, and the living tissue of the patient is sampled, and the specific trigger process is as follows: the firing key 10 extrudes the inner needle seat buckle 5-1 of the inner needle seat 5 upwards, so that the inner needle seat buckle 5-1 is separated from the buckling hole 9a of the inner needle seat buckling and locking plate 9; under the action of the spring force of the inner needle seat spring 12, the inner needle seat 5 and the sampling inner needle 3 are driven to move upwards, and the sampling inner needle 3 is firstly triggered to pop up; when the inner needle seat 5 moves upwards to strike the outer needle seat buckle 4-1 of the outer needle seat 4, the outer needle seat buckle 4-1 is separated from the buckling hole 8a of the outer needle seat buckling and locking plate 8; under the action of the spring force of the outer needle seat spring 11, the outer needle seat 4 and the sampling outer needle 2 are driven to move upwards, and the sampling outer needle 2 is automatically triggered to pop up.
The present invention is not limited to the above-described embodiments, and according to the above-described matters, the present invention may be modified, replaced or altered in various equivalent ways without departing from the basic technical spirit of the present invention, all falling within the scope of the present invention, according to the general technical knowledge and conventional means in the art.
Claims (5)
1. The utility model provides a can prevent full-automatic biopsy needle of mistake triggering, includes biopsy needle casing (1), sample outer needle (2), sample inner needle (3), outer needle file (4), interior needle file (5) and last string firing mechanism, outer needle file (4) and interior needle file (5) are in along upper and lower direction slidable mounting respectively in biopsy needle casing (1), sample outer needle (2) suit is outside sample inner needle (3), the lower extreme of sample outer needle (2) and the lower extreme of sample inner needle (3) respectively with outer needle file (4) and interior needle file (5) fixed connection, the upper end of sample outer needle (2) and the upper end of sample inner needle (3) all stretch out outside biopsy needle casing (1); the winding firing mechanism can control the full-automatic biopsy needle to enter a to-be-fired state, so that the outer needle seat (4) and the inner needle seat (5) are respectively positioned at the lower limit positions; the upper chord firing mechanism can fire the outer needle seat (4) and the inner needle seat (5) to pop up in a to-be-fired state;
the method is characterized in that:
the upper chord firing mechanism comprises an inner needle upper chord key (6) formed by sequentially connecting a pressing part (6-1), a connecting part (6-2) and a side plate part (6-3), wherein the upper end of the side plate part (6-3) is positioned above the outer needle seat (4) and the inner needle seat (5), the lower end of the side plate part (6-3) extends to a gap between the inner needle seat (5) and the biopsy needle shell (1) and is fixedly connected with the inner needle seat (5), the connecting part (6-2) avoids the sampling outer needle (2), and the pressing part (6-1) is exposed on the surface of the biopsy needle shell (1);
the full-automatic biopsy needle also comprises a safety lock tongue (7), wherein the safety lock tongue (7) comprises a sliding block (7-1), the front part of the inner side surface of the sliding block (7-1) is provided with a bumper (7-2), and the rear part of the inner side surface of the sliding block (7-1) is left to form a clearance gap (7-1 a); the sliding block (7-1) is in sliding fit with the biopsy needle shell (1) so that the safety lock tongue (7) can move between a locking position and an unlocking position along the front-back direction; when the outer needle seat (4) and the inner needle seat (5) are positioned at the respective lower limit positions and the safety lock tongue (7) moves to the locking position, the bumper (7-2) is propped against the upper end surface of the side plate part (6-3); when the safety lock tongue (7) moves to an unlocking position, the side plate part (6-3) can move up and down through the clearance gap (7-1 a);
the upper chord firing mechanism further comprises an outer needle seat buckling and locking plate (8) and an inner needle seat buckling and locking plate (9) which are fixed in the biopsy needle shell (1), and a firing key (10) which is installed at the lower end part of the biopsy needle shell (1) in an up-down sliding manner, wherein the outer needle seat (4), the outer needle seat buckling and locking plate (8), the inner needle seat (5), the inner needle seat buckling and locking plate (9) and the firing key (10) are sequentially arranged from top to bottom; an outer needle seat buckle (4-1) is arranged at the lower part of the outer needle seat (4), an outer needle seat spring (11) is arranged between the outer needle seat (4) and the outer needle seat buckle locking plate (8), and when the outer needle seat (4) moves to the lower limit position, the outer needle seat buckle (4-1) is clamped in a buckle hole (8 a) of the outer needle seat buckle locking plate (8); the lower part of the inner needle seat (5) is provided with an inner needle seat buckle (5-1), an inner needle seat spring (12) is arranged between the inner needle seat (5) and the inner needle seat buckle locking plate (9), and when the inner needle seat (5) moves to the lower limit position, the inner needle seat buckle (5-1) is clamped in a buckle hole (9 a) of the inner needle seat buckle locking plate (9).
2. The fully automatic biopsy needle capable of preventing false triggering of claim 1, wherein: the front end of the safety lock tongue (7) is provided with a locking end limiting block (7-3), and the rear end of the safety lock tongue (7) is provided with an unlocking end limiting block (7-4).
3. The fully automatic biopsy needle capable of preventing false triggering of claim 1, wherein: the top surface of the firing key (10) is provided with a first guide groove (10 a) for guiding the inner needle seat buckle (5-1) to shrink inwards and deform.
4. The fully automatic biopsy needle capable of preventing false triggering of claim 1, wherein: the top surface of the inner needle seat (5) is provided with a second guide groove (5 a) for guiding the outer needle seat buckle (4-1) to shrink inwards and deform.
5. The fully automatic biopsy needle capable of preventing false triggering of claim 1, wherein: the full-automatic biopsy needle further comprises an outer needle upper chord key (13), the lower end of the outer needle upper chord key (13) is fixedly connected with the outer needle seat (4), and the upper end of the outer needle upper chord key (13) is exposed out of the surface of the biopsy needle shell (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111000964.2A CN113907802B (en) | 2021-08-27 | 2021-08-27 | Full-automatic biopsy needle capable of preventing false triggering |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111000964.2A CN113907802B (en) | 2021-08-27 | 2021-08-27 | Full-automatic biopsy needle capable of preventing false triggering |
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| Publication Number | Publication Date |
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| CN113907802A CN113907802A (en) | 2022-01-11 |
| CN113907802B true CN113907802B (en) | 2024-03-22 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104887276A (en) * | 2015-05-11 | 2015-09-09 | 复旦大学附属肿瘤医院 | Adjustable biopsy sampling device |
| EP3300668A1 (en) * | 2016-09-30 | 2018-04-04 | Dorival Paronetto | Device for biopsy with reusable trigger for disposable needle |
| CN112790796A (en) * | 2020-06-24 | 2021-05-14 | 南京迈迪欣医疗器械有限公司 | Automatic percussion formula living tissue sampling needle |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7329227B2 (en) * | 2004-10-21 | 2008-02-12 | Inter-V-Manan | Forward-fired automatic tissue sampling apparatus with safety lock |
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2021
- 2021-08-27 CN CN202111000964.2A patent/CN113907802B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104887276A (en) * | 2015-05-11 | 2015-09-09 | 复旦大学附属肿瘤医院 | Adjustable biopsy sampling device |
| EP3300668A1 (en) * | 2016-09-30 | 2018-04-04 | Dorival Paronetto | Device for biopsy with reusable trigger for disposable needle |
| CN112790796A (en) * | 2020-06-24 | 2021-05-14 | 南京迈迪欣医疗器械有限公司 | Automatic percussion formula living tissue sampling needle |
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| CN113907802A (en) | 2022-01-11 |
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