CN113907802A - 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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- CN113907802A CN113907802A CN202111000964.2A CN202111000964A CN113907802A CN 113907802 A CN113907802 A CN 113907802A CN 202111000964 A CN202111000964 A CN 202111000964A CN 113907802 A CN113907802 A CN 113907802A
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- 238000001574 biopsy Methods 0.000 title claims abstract description 112
- 238000005070 sampling Methods 0.000 claims abstract description 67
- 230000007246 mechanism Effects 0.000 claims abstract description 22
- 238000010304 firing Methods 0.000 claims description 31
- 238000003825 pressing Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- 230000008602 contraction Effects 0.000 claims 1
- 238000004804 winding Methods 0.000 abstract description 23
- 238000002360 preparation method Methods 0.000 abstract description 17
- 230000001960 triggered effect Effects 0.000 abstract description 14
- 238000005520 cutting process Methods 0.000 description 7
- 230000009471 action Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000006378 damage Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 208000012260 Accidental injury Diseases 0.000 description 1
- 206010064912 Malignant transformation Diseases 0.000 description 1
- 230000004075 alteration Effects 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
- 208000014674 injury Diseases 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000036212 malign transformation Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000013188 needle biopsy Methods 0.000 description 1
- 210000005036 nerve Anatomy 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000006467 substitution reaction 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
Abstract
The invention discloses a full-automatic biopsy needle capable of preventing false triggering, wherein after an operator controls the full-automatic biopsy needle to enter a state to be triggered through an upper string trigger mechanism, a safety lock tongue can be moved to a locking position to enable the full-automatic biopsy needle to enter a safety locking state, namely: the inner needle upper chord key, the outer needle seat and the inner needle seat are limited from moving upwards by enabling the bumper of the safety lock tongue to abut against the upper end surface of the side plate part; therefore, the sampling outer needle and the sampling inner needle cannot pop up due to slight vibration generated when the sampling outer needle and the sampling inner needle are temporarily placed on an operating table or misoperation of an operator under the safety locking state, false triggering is prevented, the requirement that the operator can be relieved to carry out preparation work within the preparation time period before the operator formally triggers the full-automatic biopsy needle to carry out biopsy sampling after winding the full-automatic biopsy needle to the state to be triggered is met, and the situation that the full-automatic biopsy needle accidentally injures the operator or is damaged and cannot be used within the preparation time period due to false triggering 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 the diagnosis and treatment of malignant tumors, how to analyze other tissue biopsies before malignant transformation of tissues can reduce the pain of patients to the maximum extent, and how to take out target tissues from the body safely, quickly and inexpensively is a long-term research field.
Percutaneous needle biopsy, i.e. a disposable biopsy needle enters target tissue of a human body through a small incision and cuts a tissue sample for examination and analysis, has significant advantages compared with other known sampling techniques: the patient recovery time 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 less, and the damage to adjacent body tissues such as nerves is reduced.
The biopsy sample obtaining methods of biopsy needle products commonly used in the market at present can be divided into: aspiration biopsy needles, cutting biopsy needles, aspiration cutting biopsy needles. The most widely used and well-developed type of application is the cutting biopsy needle.
The biopsy needle can be divided into: a manual biopsy needle; a motorized mount biopsy needle; a motorized integrated biopsy needle.
The working principle of the cutting type motor-driven integrated biopsy needle product is as follows: the two keys are used for respectively performing the upper chord 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 the needle is triggered, the inner needle is triggered to puncture the part to be sampled, and the sampling groove at the front end of the inner needle reaches the part to be sampled. Then the inner needle triggers the outer needle to trigger automatically, the front part of the outer needle is tubular and is provided with a cutting blade body, and the sampling groove part of the inner needle is axially cut for realizing automatic sampling.
The problem that the mobile integral type biopsy needle product of present cutting formula exists lies in:
since the biopsy needle is not always ready for piercing, cutting and sampling immediately after winding, the operator also needs to perform some preparation work after winding and before sampling. However, even if the biopsy needle is not fired after being in the winding state, the operator may accidentally fire the biopsy needle due to slight vibration of the product when the biopsy needle is temporarily placed on an operating table during the taking and placing process, which may result in accidental injury to the operator or damage to the biopsy needle, which may make the biopsy needle unusable.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: provided is a fully automatic biopsy needle capable of preventing false triggering.
The technical scheme adopted by the invention is as follows:
a full-automatic biopsy needle capable of preventing false triggering comprises a biopsy needle shell, an outer sampling needle, an inner sampling needle, an outer needle seat, an inner needle seat and an upper chord firing mechanism, wherein the outer needle seat and the inner needle seat are respectively installed in the biopsy needle shell in a sliding mode along the vertical direction; referring to fig. 4, the upper-chord 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 in respective lower limit positions; referring to fig. 3, the upper string firing mechanism can fire the outer needle seat and the inner needle seat to pop up to sample living tissues in a state of waiting to be fired;
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, 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 out of the surface of the biopsy needle shell; such that: an operator can press the pressing part of the upper chord key of the inner needle downwards to drive the inner needle base to move downwards to the lower limit position.
Referring to fig. 7, the full-automatic biopsy needle further comprises a safety lock tongue, 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 slide 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 in 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, so that the side plate part of the inner needle upper chord key of the safety lock tongue is locked, and the inner needle upper chord key, the outer needle seat and the inner needle seat are limited to be incapable of moving upwards; when the safety lock tongue moves to the unlocking position, the side plate part can penetrate through the clearance gap to move up and down, and the safety lock tongue is unlocked to lock the side plate part.
Therefore, after an operator controls the full-automatic biopsy needle of the present invention to enter the to-be-fired state as shown in fig. 4 through the winding firing mechanism, the safety lock tongue may be moved to the locking position as shown in fig. 5, so that the full-automatic biopsy needle of the present invention enters the safety locking state as shown in fig. 6, that is: the inner needle upper chord key, the outer needle seat and the inner needle seat are limited from moving upwards by enabling a bumper of the bumper lock tongue to abut against the upper end face of the side plate part; therefore, the sampling outer needle and the sampling inner needle cannot pop up due to slight vibration generated when the sampling outer needle and the sampling inner needle are 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 be relieved to carry out preparation work in a preparation time period before the operator formally triggers the full-automatic biopsy needle to carry out biopsy sampling after winding the full-automatic biopsy needle to a state to be triggered is met, and the situation that the full-automatic biopsy needle accidentally injures the operator or is damaged and cannot be used in the preparation time period due to false triggering is avoided.
Wherein the biopsy needle housing is preferably designed as a handle shape adapted to be held by an operator.
Preferably: referring to fig. 7, a locking end limiting block is arranged at the front end of the safety lock tongue, and an unlocking end limiting block is arranged at the rear end of the safety lock tongue to limit the safety lock tongue from falling off the biopsy needle housing and facilitate the movement of the safety lock tongue by an operator.
As a preferred embodiment of the present invention: the upper chord firing mechanism also comprises an outer needle seat locking plate and an inner needle seat locking plate which are fixed in the biopsy needle shell, and a firing key which is installed at the lower end part of the biopsy needle shell in an up-and-down sliding manner, wherein the outer needle seat, the outer needle seat locking plate, the inner needle seat locking plate and the firing key are sequentially arranged from top to bottom; the lower part of the outer needle base is provided with an outer needle base buckle, an outer needle base spring is arranged between the outer needle base and the outer needle base buckle and lock plate, and when the outer needle base moves to the lower limit position of the outer needle base, the outer needle base buckle is clamped in the buckle hole of the outer needle base buckle and lock plate; the lower part of the inner needle base is provided with an inner needle base buckle, an inner needle base spring is arranged between the inner needle base and the inner needle base buckle and lock plate, and when the inner needle base moves to the lower limit position, the inner needle base buckle is clamped in the buckle hole of the inner needle base buckle and lock plate.
Preferably: the top surface of the trigger key is provided with a first guide groove for guiding the inner needle seat buckle to contract and deform inwards, so that: when the triggering key moves upwards to extrude the inner needle seat buckle of the inner needle seat, the first guide groove can guide the inner needle seat buckle to contract inwards to deform, so that the inner needle seat buckle can be easier to break away from the buckling hole of the inner needle seat buckle and lock plate.
Preferably: the top surface of interior needle file is equipped with and is used for guiding outer needle file buckle is to the second guide way of the inward shrinkage deformation to make: when the inner needle base moves upwards to collide the outer needle base buckle of the outer needle base, the second guide groove can guide the outer needle base buckle to contract inwards to deform, so that the outer needle base buckle can be more easily separated from the buckle hole of the outer needle base buckle and lock plate.
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 upper chord of the sampling outer needle is realized.
The working principle of the invention is thus as follows:
first, as shown in fig. 2 and 3, before the fully automatic biopsy needle of the present invention is used, the safety catch is moved to the unlocked position so that the safety catch does not obstruct the up-and-down movement of the inner needle winding 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, and the sampling outer needle is strung, and then 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 sampling inner needle is strung.
The second mode is that the internal needle winding key can be directly pressed, the internal needle seat is driven to move downwards through the side plate part, and the external needle seat is driven to move downwards through the connecting part, so that the winding on the sampling external needle and the sampling internal needle can be realized simultaneously; however, the force required for winding in the second mode is relatively large, and winding is generally performed in the first mode.
Wherein, in a cocked state, the outer and inner needle holder springs 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 a safety locking state, the sampling outer needle and the sampling inner needle are ensured not to pop up due to slight vibration or misoperation of an operator caused by temporary placement on an operating table in the safety locking state, false triggering is prevented, the operator can safely carry out preparation work at the moment, and the full-automatic biopsy needle is prevented from accidentally injuring the operator or being damaged and being incapable of being used due to false triggering.
Finally, as shown in fig. 4, after the preparation work is completed, when the biopsy is sampled, the safety lock tongue is moved to the unlocking position again, so that the full-automatic biopsy needle is restored to the state to be triggered, then the triggering key is pressed, the outer needle seat and the inner needle seat can be triggered to pop up, the biopsy of the patient is sampled, and the specific triggering process is as follows: the triggering key upwards extrudes the inner needle seat buckle of the inner needle seat to separate the inner needle seat buckle from the buckle hole of the inner needle seat buckle and lock plate; under the action of the spring force of the inner needle base spring, the inner needle base and the sampling inner needle are driven to move upwards, and the sampling inner needle is firstly triggered to pop up; until the inner needle base moves upwards to impact the outer needle base buckle of the outer needle base, the outer needle base buckle is separated from the buckle hole of the outer needle base 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 an inner needle winding key and a safety lock tongue, after an operator controls the full-automatic biopsy needle to enter a state to be fired through a winding firing mechanism, the safety lock tongue can be moved to a locking position firstly, so that the full-automatic biopsy needle enters a safety locking state, namely: the inner needle upper chord key, the outer needle seat and the inner needle seat are limited from moving upwards by enabling a bumper of the bumper lock tongue to abut against the upper end face of the side plate part; therefore, the sampling outer needle and the sampling inner needle cannot pop up due to slight vibration generated when the sampling outer needle and the sampling inner needle are 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 be relieved to carry out preparation work in a preparation time period before the operator formally triggers the full-automatic biopsy needle to carry out biopsy sampling after winding the full-automatic biopsy needle to a state to be triggered is met, and the situation that the full-automatic biopsy needle accidentally injures the operator or is damaged and cannot be used in the preparation time period due to false triggering is avoided.
Secondly, the upper string 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 following figures and specific examples:
FIG. 1 is a schematic structural view of a fully automatic biopsy needle according to the present invention;
FIG. 2 is a schematic structural view of the present invention with the safety catch in the 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 catch of the present invention in a locked position;
FIG. 6 is a schematic cross-sectional view of the present invention in a safety locked condition;
fig. 7 is a schematic structural view of the safety lock tongue of the present invention.
Detailed Description
The present invention will be described in detail with reference to the following embodiments 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 embodiments, and all other embodiments obtained without inventive efforts by those skilled in the art will fall within the scope of the present invention without departing from the inventive concept of the present invention.
In the description of the present invention, it is to be understood that the terms "upper, lower, front, and rear" are used merely for convenience of description and to simplify the description, and are not intended to limit the invention by indicating or implying any particular orientation required by the present invention.
Example one
As shown in fig. 1 to 7, the present invention discloses a full-automatic biopsy needle capable of preventing false triggering, which includes a biopsy needle housing 1, an outer sampling needle 2, an inner sampling needle 3, an outer needle holder 4, an inner needle holder 5 and an upper string firing mechanism, wherein the outer needle holder 4 and the inner needle holder 5 are respectively installed in the biopsy needle housing 1 in a sliding manner along the up-down direction, the outer sampling needle 2 is sleeved outside the inner sampling needle 3, the lower end of the outer sampling needle 2 and the lower end of the inner sampling needle 3 are respectively fixedly connected with the outer needle holder 4 and the inner needle holder 5, and the upper end of the outer sampling needle 2 and the upper end of the inner sampling needle 3 both extend out of the biopsy needle housing 1; referring to fig. 4, the upper-chord 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 at respective 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 upwards to sample living tissues 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, the upper end of the side plate part 6-3 is positioned above the outer needle base 4 and the inner needle base 5, the lower end of the side plate part 6-3 extends to the gap between the inner needle base 5 and the biopsy needle shell 1 and is fixedly connected with the inner needle base 5, the connecting part 6-2 avoids the sampling outer needle 2, and the pressing part 6-1 is exposed out of the surface of the biopsy needle shell 1; such that: the operator can press the pressing part 6-1 of the inner needle upper chord key 6 downwards to drive the inner needle base 5 to move downwards to the lower limit position.
Referring to fig. 7, the full-automatic biopsy needle further comprises a safety lock tongue 7, 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 respective lower limit positions and the safety lock tongue 7 moves to the locking position, the bumper 7-2 abuts against the upper end surface of the side plate part 6-3, so that the side plate part 6-3 of the inner needle upper chord key 6 of the safety lock tongue 7 is locked, 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 penetrate through the clearance gap 7-1a to move up and down, and the safety lock tongue 7 is unlocked to lock the side plate part 6-3.
Therefore, after the operator controls the fully automatic biopsy needle of the present invention to enter the to-be-fired state as shown in fig. 4 through the winding firing mechanism, the safety lock tongue 7 may be moved to the locking position as shown in fig. 5, so that the fully automatic biopsy needle of the present invention enters the safety locking state as shown in fig. 6, that is: the inner needle upper chord key 6, the outer needle seat 4 and the inner needle seat 5 are limited from moving upwards by enabling the bumper 7-2 of the bumper lock tongue 7 to abut against the upper end surface of the side plate part 6-3; therefore, the sampling outer needle 2 and the sampling inner needle 3 are ensured not to pop up due to slight vibration generated by temporary placement on an operating table or misoperation of an operator in a safety locking state, false triggering is prevented, the requirement that the operator can be relieved to perform preparation work in a preparation time period before formally triggering the full-automatic biopsy needle to perform biopsy sampling after winding the full-automatic biopsy needle to a state to be triggered is met, and the full-automatic biopsy needle is prevented from accidentally injuring the operator or being damaged and cannot be used due to false triggering in the preparation time period.
Wherein the biopsy needle housing 1 is preferably designed as a handle shape adapted to be held by an operator.
The above is a basic implementation manner of the first embodiment, and further optimization, improvement and limitation may be performed on the basis of the basic implementation manner:
preferably: referring to fig. 7, a locking end stopper 7-3 is disposed at the front end of the safety lock tongue 7, and an unlocking end stopper 7-4 is disposed at the rear end of the safety lock tongue 7 to prevent the safety lock tongue 7 from falling off the biopsy needle housing 1 and to facilitate the movement of the safety lock tongue 7 by an operator.
Example two
On the basis of the first embodiment, the second embodiment also adopts the following preferred embodiments:
the upper chord firing mechanism further comprises an outer needle seat locking plate 8 and an inner needle seat locking plate 9 which are fixed in the biopsy needle shell 1, and a firing key 10 which is installed at the lower end of the biopsy needle shell 1 in a vertically sliding mode, wherein the outer needle seat 4, the outer needle seat locking plate 8, the inner needle seat 5, the inner needle seat locking plate 9 and the firing key 10 are sequentially arranged from top to bottom; the lower part of the outer needle base 4 is provided with an outer needle base buckle 4-1, an outer needle base spring 11 is arranged between the outer needle base 4 and the outer needle base buckle locking plate 8, and when the outer needle base 4 moves to the lower limit position, the outer needle base buckle 4-1 is clamped in a buckle hole 8a of the outer needle base buckle locking plate 8; the lower part of the inner needle base 5 is provided with an inner needle base buckle 5-1, an inner needle base spring 12 is arranged between the inner needle base 5 and the inner needle base buckle locking plate 9, and when the inner needle base 5 moves to the lower limit position, the inner needle base buckle 5-1 is clamped in the buckle hole 9a of the inner needle base buckle locking plate 9.
The above is the basic implementation manner of the second embodiment, and further optimization, improvement and limitation can be made on the basis of the basic implementation manner:
preferably: the top surface of the firing key 10 is provided with a first guide groove 10a for guiding the inward shrinkage deformation of the inner needle seat buckle 5-1, so that: when the triggering key 10 moves upwards to press the inner needle seat buckle 5-1 of the inner needle seat 5, the first guide groove 10a can guide the inner needle seat buckle 5-1 to contract inwards and deform, so that the inner needle seat buckle 5-1 can be more easily separated from the buckling hole 9a of the inner needle seat buckle locking plate 9.
Preferably: the top surface of the inner needle seat 5 is provided with a second guide groove 5a for guiding the inward shrinkage deformation of the outer needle seat buckle 4-1, so that: when the inner needle base 5 moves upwards to collide with the outer needle base buckle 4-1 of the outer needle base 4, the second guide groove 5a can guide the outer needle base buckle 4-1 to contract inwards to deform, so that the outer needle base buckle 4-1 can be separated from the buckle hole 8a of the outer needle base buckle 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 seat 4 is driven to move downwards by the outer needle upper chord key 13, and the upper chord of the sampling outer needle 2 is realized.
The working principle of the invention is thus as follows:
first, as shown in fig. 2 and 3, before the fully automatic biopsy needle of the present invention is used, the safety catch 7 is moved to the unlocking position so that the safety catch 7 does not obstruct the up-and-down movement of the inner needle winding 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 buckle hole 8a of the outer needle seat buckle plate 8, and the upper chord of the sampling 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 buckle hole 9a of the inner needle seat buckle plate 9, and the upper chord of the sampling inner needle 3 is realized.
In the second mode, the inner needle upper chord key 6 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 chord of the sampling outer needle 2 and the upper chord of the sampling inner needle 3 are realized simultaneously; however, the force required for winding in the second mode is relatively large, and winding is generally performed in the first mode.
Wherein the outer needle carrier spring 11 and the inner needle carrier 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 a safety locking state, the sampling outer needle 2 and the sampling inner needle 3 are ensured not to pop up due to slight vibration or misoperation of an operator caused by temporary placement on an operating table in the safety locking state, false triggering is prevented, the operator can safely carry out preparation work at the moment, and the full-automatic biopsy needle is prevented from accidentally injuring the operator or being damaged and being incapable of use due to false triggering.
Finally, as shown in fig. 4, after the preparation work is completed, when the biopsy is sampled, the safety lock tongue 7 is moved to the unlocking position again, so that the fully automatic biopsy needle is restored to the state to be fired, and then the firing key 10 is pressed, so that the outer needle seat 4 and the inner needle seat 5 can be fired to pop up, so as to sample the biopsy of the patient, wherein the specific firing process is as follows: the triggering key 10 upwards presses the inner needle seat buckle 5-1 of the inner needle seat 5 to separate the inner needle seat buckle 5-1 from the buckle hole 9a of the inner needle seat buckle locking plate 9; under the action of the spring force of the inner needle base spring 12, the inner needle base 5 and the sampling inner needle 3 are driven to move upwards, and the sampling inner needle 3 is firstly triggered to pop up; until the inner needle base 5 moves upwards to impact the outer needle base buckle 4-1 of the outer needle base 4, the outer needle base buckle 4-1 is separated from the buckle hole 8a of the outer needle base buckle 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 embodiments, and various other equivalent modifications, substitutions and alterations can be made without departing from the basic technical concept of the invention as described above, according to the common technical knowledge and conventional means in the field.
Claims (6)
1. A full-automatic biopsy needle capable of preventing false triggering comprises a biopsy needle shell (1), an outer sampling needle (2), an inner sampling 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 installed in the biopsy needle shell (1) in a sliding mode along the vertical direction, the outer sampling needle (2) is sleeved outside the inner sampling needle (3), the lower end of the outer sampling needle (2) and the lower end of the inner sampling needle (3) are respectively fixedly connected with the outer needle seat (4) and the inner needle seat (5), and the upper end of the outer sampling needle (2) and the upper end of the inner sampling needle (3) extend out of the biopsy needle shell (1); the upper chord 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 state of waiting to be fired;
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), 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 out of the surface of the biopsy needle shell (1);
the full-automatic biopsy needle further comprises a safety lock tongue (7), 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 respective lower limit positions and the safety lock tongue (7) moves to a locking position, the bumper (7-2) abuts against the upper end face of the side plate part (6-3); when the safety lock tongue (7) moves to the unlocking position, the side plate part (6-3) can penetrate through the clearance gap (7-1a) to move up and down.
2. The fully automatic biopsy needle capable of preventing false triggering according to 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 according to claim 1 or 2, wherein: the upper chord firing mechanism further comprises an outer needle seat locking plate (8) and an inner needle seat 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 a vertically sliding mode, wherein the outer needle seat (4), the outer needle seat locking plate (8), the inner needle seat (5), the inner needle seat locking plate (9) and the firing key (10) are sequentially arranged from top to bottom; the lower part of the outer needle seat (4) is provided with an outer needle seat buckle (4-1), 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 base (5) is provided with an inner needle base buckle (5-1), an inner needle base spring (12) is arranged between the inner needle base (5) and the inner needle base buckle locking plate (9), and when the inner needle base (5) moves to the lower limit position, the inner needle base buckle (5-1) is clamped in a buckle hole (9a) of the inner needle base buckle locking plate (9).
4. The fully automatic biopsy needle capable of preventing false triggering according to claim 3, wherein: the top surface of the firing key (10) is provided with a first guide groove (10a) for guiding the inward contraction deformation of the inner needle seat buckle (5-1).
5. The fully automatic biopsy needle capable of preventing false triggering according to claim 3, wherein: the top surface of the inner needle seat (5) is provided with a second guide groove (5a) for guiding the inward shrinkage deformation of the outer needle seat buckle (4-1).
6. The fully automatic biopsy needle capable of preventing false triggering according to claim 3, 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 base (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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| CN202111000964.2A CN113907802B (en) | 2021-08-27 | 2021-08-27 | Full-automatic biopsy needle capable of preventing false triggering |
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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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| CN113907802B CN113907802B (en) | 2024-03-22 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060089565A1 (en) * | 2004-10-21 | 2006-04-27 | Inter-V Manan | Forward-fired automatic tissue sampling apparatus with safety lock |
| 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 |
-
2021
- 2021-08-27 CN CN202111000964.2A patent/CN113907802B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060089565A1 (en) * | 2004-10-21 | 2006-04-27 | Inter-V Manan | Forward-fired automatic tissue sampling apparatus with safety lock |
| 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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| CN113907802B (en) | 2024-03-22 |
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