CN114098838A - Directionally-bendable biopsy needle kit for extracting brain tissue lesion - Google Patents
Directionally-bendable biopsy needle kit for extracting brain tissue lesion Download PDFInfo
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- CN114098838A CN114098838A CN202111337256.8A CN202111337256A CN114098838A CN 114098838 A CN114098838 A CN 114098838A CN 202111337256 A CN202111337256 A CN 202111337256A CN 114098838 A CN114098838 A CN 114098838A
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- 238000001574 biopsy Methods 0.000 title claims abstract description 170
- 210000005013 brain tissue Anatomy 0.000 title claims abstract description 21
- 230000003902 lesion Effects 0.000 title claims abstract description 13
- 230000007246 mechanism Effects 0.000 claims abstract description 92
- 230000000149 penetrating effect Effects 0.000 claims abstract description 14
- 230000001154 acute effect Effects 0.000 claims description 5
- 239000002861 polymer material Substances 0.000 claims description 5
- 239000012781 shape memory material Substances 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 239000000017 hydrogel Substances 0.000 claims description 2
- 230000035515 penetration Effects 0.000 claims description 2
- 210000004556 brain Anatomy 0.000 abstract description 4
- 230000000712 assembly Effects 0.000 abstract 1
- 238000000429 assembly Methods 0.000 abstract 1
- 210000001519 tissue Anatomy 0.000 description 27
- 210000003811 finger Anatomy 0.000 description 10
- 210000004247 hand Anatomy 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 238000002955 isolation Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 238000011109 contamination Methods 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 230000036285 pathological change Effects 0.000 description 3
- 231100000915 pathological change Toxicity 0.000 description 3
- 210000003813 thumb Anatomy 0.000 description 3
- 206010008111 Cerebral haemorrhage Diseases 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000002490 cerebral effect Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 210000000056 organ Anatomy 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 206010051290 Central nervous system lesion Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 210000003625 skull Anatomy 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
- A61B10/0275—Pointed or sharp biopsy instruments means for severing sample with sample notch, e.g. on the side of inner stylet
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Abstract
The invention relates to the technical field of biopsy needles, in particular to a directionally-bendable biopsy needle kit for extracting brain tissue lesions, which comprises one set or two sets of penetrating mechanisms and two sets of biopsy mechanism assemblies with straight ends and bendable ends, wherein each set of penetrating mechanism comprises a working sleeve, a first handle, a sleeve inner core and a second handle, the top end of the working sleeve is fixedly provided with the first handle, and the sleeve inner core is inserted into the working sleeve. According to the invention, the working sleeve and the sleeve inner core are combined and then inserted into a specified position and depth, the sleeve inner core is taken out, the biopsy mechanism is combined and taken out, then the sleeve inner core is inserted along the top end of the working sleeve, and can be automatically bent to restore the initial angle when extending out of the working sleeve, so that the sleeve inner core is aligned to the position of lesion tissues needing to be sampled in the brain, the biopsy needle core is pulled out, the brain tissues are cut off, then the third handle is pulled out, and then the biopsy brain tissues can be taken out.
Description
Technical Field
The invention relates to the technical field of biopsy needles, belongs to the series of applications of Chinese patent ZL202122507186.8, and particularly relates to a biopsy needle kit capable of being bent in an oriented mode and used for extracting brain tissue lesions.
Background
The brain tissue lesion biopsy is an important means for determining the nature of brain lesions and determining a treatment scheme, and because the brain tissue is one of the most abundant organs for supplying blood to human bodies, how to avoid cerebral hemorrhage caused by injuring cerebral vessels in the biopsy operation is the key of the biopsy operation, wherein the puncture mode and the material taking mode of a biopsy needle are important influencing factors.
The existing brain tissue biopsy needle is generally straight and only can be used for extracting tissues at the front end in the insertion direction, so that very strict requirements are imposed on the angle, depth and position of the needle insertion, corresponding pathological change tissues cannot be taken or the quality of the taken pathological change tissues is poor once the needle is deviated, subsequent detection is influenced, and in addition, the biopsy needle which utilizes negative pressure to suck and cut is also provided, but the structure is complex, the needle is not flexible and quick to use in an operation, and cerebral hemorrhage caused by puncturing cerebral vessels is easy to occur, so that secondary harm is caused to a patient.
In addition, the contact position of the medical instrument is required to be cleaned and disinfected, and even if the medical instrument is operated by hands, the contact position also needs to be isolated by using gloves, finger sleeves and other isolation tools. And the isolation tool has the possibility of pollution in the production, transportation and use processes. Therefore, in consideration of the probability, before the medical instrument is operated, the number of times that the contacted part involved in the operation has been contacted before is reduced as much as possible, and the contact part is far away from the operation object (such as tissues and organs or insertion holes thereof) as much as possible, so as to reduce the probability that the isolation tool contacts the operation object.
Disclosure of Invention
The present invention is directed to a biopsy needle set capable of bending in an oriented manner for extracting brain tissue lesions, so as to solve the problems mentioned in the background art. In order to achieve the purpose, the invention provides the following technical scheme: a biopsy needle kit capable of being bent in an oriented mode and used for extracting brain tissue lesion comprises one set or two sets of penetrating mechanisms and a biopsy taking mechanism, wherein each penetrating mechanism comprises a working sleeve, a sleeve inner core and a first wheel, the first wheel is used for being grasped by two hands to adjust the penetrating depth of the sleeve inner core and the rotating angle of the sleeve inner core.
The top fixed mounting of working sleeve has the first in command, the inside of working sleeve has been inserted the sleeve inner core, the top fixed mounting of sleeve inner core has first wheel, it includes that first biopsy mechanism subassembly and/or the second of getting to get biopsy mechanism subassembly and second, first biopsy mechanism subassembly of getting and second all include biopsy hose, third handle, cutting hose, supply both hands to grasp with control get biopsy mechanism bottom (here the bottom is got biopsy mechanism subassembly and second to first biopsy mechanism subassembly of getting and is got biopsy mechanism subassembly and second and include respectively straight end and the curved hook end of being broken into with the fingers and thumb) and penetrate the working sleeve and adjust cutting hose bottom (here the bottom is got biopsy mechanism subassembly and second to first biopsy mechanism subassembly of getting and second and is got biopsy mechanism subassembly and include respectively straight end and resume crooked the curved second of cutting hose's curved hook wheel rotation angle, Biopsy needle core, fifth handle.
A third handle is fixedly sleeved at the top end of the biopsy hose, the second handle wheel is fixedly installed at the top end of the cutting hose, a fifth handle is fixedly installed at the top of the biopsy needle core, the cutting hose is sleeved outside the biopsy needle core, and the biopsy hose is sleeved outside the cutting hose; wherein,
the biopsy hose, the cutting hose and the biopsy needle core of the first biopsy taking mechanism assembly are composed of vertical cylinders, each vertical cylinder is respectively provided with a first straight end, a second straight end and a third straight end, the second straight end is set as a cutting hose tip, a first cutting groove is formed in the cutting hose tip, the biopsy hose is provided with a first straight end, the first straight end is provided with a first through groove which can be aligned with the first cutting groove, the biopsy needle core is provided with a third straight end, the second straight end and the first straight end are sequentially sleeved from inside to outside to form the first biopsy taking mechanism assembly, and the third straight end, the second straight end and the first straight end are rigid;
the biopsy hose, the cutting hose and the biopsy needle core of the second biopsy taking mechanism component are composed of a vertical cylinder and a first hook end, a second hook end and a third hook end which extend from one end far away from the third handle, the second handle wheel and the fifth handle on the respective vertical cylinder respectively, a turning spiral structure is arranged at the hook of the second hook end of the cutting hose of the second biopsy taking mechanism component, the end part of the second hook end is set to be a tip end of the cutting hose, a second cutting groove is arranged at the tip end of the cutting hose, a second through groove which can be aligned with the second cutting groove is arranged at the end part of the first hook end, the third hook end, the second hook end and the first hook end are sequentially sleeved from inside to outside to form the second biopsy taking mechanism component, and the hook part of the third hook end is made of a shape memory material, the first hook and the second hook are made of high polymer materials or metal materials.
It can be understood that the third hook end, the second hook end and the first hook end can be wholly or respectively bent under the action of external force to be automatically restored to the hook shape after a certain time before or after being sleeved with each other. When the kit optionally comprises two sets of penetrating mechanisms, the two sets of penetrating mechanisms can be respectively matched with the first biopsy taking mechanism assembly and the second biopsy taking mechanism assembly for use, so that different tissue sampling conditions of the same operation can be provided, and a sampling mode can be flexibly selected.
Preferably, the surfaces of the third handle and the second handle wheel of the first biopsy taking mechanism assembly are provided with first direction marking lines, and the surfaces of the third handle, the second handle wheel and the fifth handle of the second biopsy taking mechanism assembly are provided with second direction marking lines respectively for aligning the first cutting groove and the first passing groove and for sleeving the third hook end, the second hook end and the first hook end and aligning the second cutting groove and the second passing groove.
It can be understood that, for the second biopsy mechanism assembly, if there is no second direction marking line, besides it is inconvenient to align the second cutting groove and the second passing groove, it is also inconvenient to determine the orientation of the respective sections of the third hook end, the second hook end and the first hook end, so that they are not convenient to be sleeved with each other, and only when the sections are overlapped, the smooth sleeving can be performed, which is different from the sleeving of the third straight end, the second straight end and the first straight end of the first biopsy mechanism assembly. No matter how the rigid straight ends coaxially rotate with each other, the cross sections which are overlapped with each other can be found, so that the straight ends can be smoothly sleeved with each other.
The first wheel of the second biopsy taking mechanism assembly is provided with a plurality of cylindrical holes which can assist in straightening the hook end of the completely assembled second biopsy taking mechanism assembly by virtue of the cylindrical holes, and preferably, each cylindrical hole can independently assist in straightening the hook end of the completely assembled second biopsy taking mechanism assembly.
Alternatively, the first wheel of the first biopsy mechanism assembly may not have the at least one cylindrical aperture because the first biopsy mechanism assembly is rigid and straight for picking tissue at the leading end without requiring straightening.
It will be appreciated that when the cannula core is withdrawn from the working cannula, the hooked ends (including the first to third hooked ends and the hooked end formed after the second biopsy mechanism assembly is assembled) can be straightened by the cylindrical bore to effect nesting of the hooked ends.
Preferably, the first to third hook ends should be straightened directly by means of the socket holes of the respective vertical bodies of the second biopsy mechanism assembly through which the socket is to be passed.
Insert when the crotch end tip that the biopsy mechanism subassembly was got to the second that finishes of constituteing will behind the cylinder hole the tip restriction is in the cylinder hole, can break straight with the fingers and thumb hook department with the help of external force this moment, and insert the work sleeve pipe after extracting, and each vertical cylinder and crotch end are because of being unable crooked the recovery by the restriction of work sleeve pipe inner wall, can pass through the second this moment and take the axial rotation angle of each vertical cylinder of wheel overall regulation and crotch end to when the crotch end stretches out can resume the crotch shape behind the work sleeve pipe in certain time, and then make the tip of crotch end reach predetermined retrieval position when the crotch department resumes the crotch process and finishes.
It will be appreciated that if the inner wall of the working cannula is used as an auxiliary structure for straightening, although the contamination possibility caused by straightening by hand can be avoided, the formation of the second biopsy taking mechanism assembly requires several times of straightening operations for the first to third hook ends, thus increasing the contamination possibility.
However, the straight-off of the sheathing hole of each vertical body is only the straight-off of the corresponding hook end at one time, for example, the sheathing hole of the vertical body of the biopsy hose is only used for the straight-off of the second hook end of the cutting hose, while the sheathing hole of the vertical body of the cutting hose is only used for the straight-off of the hook end of the biopsy needle core, and each sheathing hole is only one time by the number of straight-off times, and the probability of contamination is low compared with the straight-off of the inner wall of the working cannula for many times. And the straight-off of the working cannula can cause high-probability damage to brain tissues due to the high-probability movement of the working cannula. And movement also causes a high probability that subsequently reached sites deviate from the intended acquisition site.
Similarly, the hook ends (formed by sleeving the first to third hook ends) of the second biopsy taking mechanism assembly which is completed are assisted to be straightened by virtue of the cylindrical holes at one time, so that the pollution probability is low.
Therefore, the probability of pollution caused by manual operation or multiple times of straightening through the same sleeving hole can be reduced through the design of the cylindrical hole on the first wheel. Meanwhile, the design of the handle wheel can stably control the depth or the depth of penetration and/or the rotating direction by using two hands, and the distance between the two hands and the tissue to be detected is far. The wheel has a radius so that the distance is in the hypotenuse direction of the right triangle deviating from the axial direction of the vertical body, namely, the holding point of the wheel is operated to be farther away from the penetrating point of the working sleeve penetrating into the brain tissue than the holding point directly at one end of the vertical body serving as an operating point, so that the probability that the isolation tool is contacted (whether accidentally contacted or not) to the tissue to be taken out is reduced.
Preferably, the first and second cutting grooves and the first and second passing grooves are square grooves. In one embodiment, the first and second cutting flutes have a cutting blade disposed in a notch, preferably the cutting blade includes an acute tip disposed at opposite side edges of the notch, more preferably the cutting blade has a longitudinal cross-section in the shape of a trapezoid having the acute tip as a base angle, most preferably a lower base edge of the trapezoid being closer to the first and second through-slots than an upper base edge.
Preferably, the outer surfaces of the working cannula and the biopsy hose are provided with scale marks.
Preferably, the biopsy hose has an inner diameter which is the same as the outer diameter of the cutting hose.
Preferably, the shape memory material is a super-elastic memory metal, a memory hydrogel or a memory polymer material.
Preferably, the first handle wheel and the second handle wheel are provided with at least two hand grasping holes for facilitating hand grasping, so that fingers can pass through the first handle wheel and the second handle wheel to grasp the first handle wheel and the second handle wheel.
Compared with the prior art, the invention has the beneficial effects that:
in the invention, a working sleeve and a sleeve inner core are combined and then inserted into a designated position and depth, then the sleeve inner core is taken out by using a first wheel, a biopsy needle core is inserted into a cutting hose until the bottom end of the biopsy needle core enters the tip end of the cutting hose, then the cutting hose is inserted into the biopsy hose, the through groove is adjusted to be aligned and superposed with the cutting groove to obtain a combined biopsy taking mechanism, the bottom end of the combined biopsy taking mechanism is straightened and then inserted along the top end of the working sleeve, when the bottom end of the combined biopsy taking mechanism extends out of the working sleeve, the combined biopsy taking mechanism can be automatically bent to restore the initial angle to align the position of lesion tissues needing to be sampled in the brain, at the moment, a fifth handle is used for pulling out the biopsy needle core to generate negative pressure so that brain tissue bulges enter the through groove and the cutting groove, the brain tissue can be cut off by rotating a second handle wheel, then the second handle is pulled out to bring out a third handle, and then the brain biopsy tissues can be taken out, the trompil of cutting hose rear end is applicable to the syringe front end standard, but adaptation syringe front end size, and it is protruding to be not enough to make the tissue when extracting the biopsy stylet negative pressure of extracting, can external syringe assist the use, and this device can gather the crooked regulation of mouth according to the position condition of needle inserting position and pathological change tissue, and the flexibility is stronger.
The external member adopts the external member of straight end and crotch end, is adapted to getting of different positions brain tissue and examines, uses can both hands steadily to deepening the degree of depth and cut the groove and carry out the accuracy regulation through the direction in groove to the wheel design, and can get the crotch end of biopsy mechanism subassembly with the help of the first cylinder hole on the wheel again under the low pollution probability condition and break straight off with the fingers and thumb to the second. With a cutting blade having a specific sharp pointed end, the underlying tissue can be cut more effectively.
Drawings
FIG. 1A is a schematic front view of a piercing mechanism of the present invention;
fig. 1B is a schematic front view of the working casing according to the present invention.
FIG. 1C is a schematic front view of the inner core of the cannula of the present invention;
FIG. 1D is a bottom view of the first wheel 2 of FIG. 1C;
fig. 1E is a schematic diagram illustrating how the hook B of the hook end of the second biopsy taking mechanism assembly in fig. 2A is straightened by the cylindrical hole 23 in fig. 1D.
FIG. 2A is a front cross-sectional structural view of a second biopsy mechanism assembly according to the present invention;
FIG. 2B is a bottom view of the second wheel 4 of FIG. 2A;
FIG. 2C is a schematic diagram of the mechanical analysis of the three types of cutting knives for cutting tissue on a vertical section perpendicular to the paper surface after the circle in FIG. 2A is partially enlarged;
FIG. 3 is a front view of the biopsy tube of the present invention;
FIG. 4 is a front view of the cutting hose of the present invention;
fig. 5 is a front view of the biopsy needle core of the invention.
Wherein the reference numbers: 1. a first handle; 10. a threading mechanism; 2. a first handle wheel; 20. a second biopsy mechanism assembly; 21. an inner core of the sleeve; 22 a hand grip hole provided in the first handle wheel 2; 23. a cylindrical bore; 3. a third handle; 31. a biopsy hose; 32. a second passage groove; 4. a second handle wheel; 41. cutting the hose; 42. cutting the tip of the hose; 43. a second cutting groove; 44. a direction-changing spiral structure; 45. a hand grip hole provided in the second handle wheel 4; 5. a fifth handle; 51. a biopsy needle core; 6. a second direction marking line; 7. a working sleeve; 11. scale lines; G. breaking the straight direction; F. cutting resultant force; s, cutting small-volume tissues D and large-volume tissues D; r, cutting direction.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Example 1
The invention provides a technical scheme that: a biopsy needle kit for extracting brain tissue lesion, which can be bent directionally, comprises a set of penetrating mechanism 10 and a biopsy taking mechanism, wherein the penetrating mechanism comprises a working sleeve 7 as shown in figure 1A, a sleeve inner core 21 and a first wheel 2 for holding by both hands to adjust the penetrating depth of the sleeve inner core and the rotating angle of the sleeve inner core.
A first handle 1 is fixedly arranged at the top end of the working sleeve 7 shown in fig. 1B, a sleeve inner core 21 is inserted into the working sleeve 7 shown in fig. 1A, a first handle wheel 2 is fixedly arranged at the top end of the sleeve inner core 21 shown in fig. 1C, two hand-holding holes 22 for fingers to pass through and hold are formed in the first handle wheel 2, and a cylindrical hole 23 (shown in fig. 1C and 1D) is formed in the side surface of the first handle wheel 2 to straighten the second biopsy taking mechanism assembly 20 in a manner shown in fig. 1E.
Specifically, the two fingers of the left hand pass through the hand grasping holes 22, the two fingers of the right hand pass through the two hand grasping holes 45 of the second biopsy mechanism assembly 20, the end portion a of the hook end of the second biopsy mechanism assembly 20 is inserted into the cylindrical hole 23 in alignment, the two fingers of the left hand control the cannula inner core 21 to rotate as little as possible (but can translate a little), and the two fingers of the right hand control the second handle wheel 4 of the second biopsy mechanism assembly 20 to break the hook portion B of the hook end in a clockwise direction with the cannula inner core 21 as an axis, as indicated by G.
As shown in fig. 2A, the biopsy taking mechanism includes a first biopsy taking mechanism assembly (not shown) and a second biopsy taking mechanism assembly 20, the second biopsy taking mechanism assembly 20 includes a biopsy needle core 51, a fifth handle 5, a cutting hose 41, a second handle wheel 4 for gripping with both hands to control the bottom end of the second biopsy taking mechanism assembly 20 to be straightened to penetrate into the working sleeve 7 and adjust the rotation angle of the bottom end of the second biopsy taking mechanism assembly 20, and a biopsy hose 31, the top of the biopsy needle core is fixedly provided with the fifth handle 5, the cutting hose 41 is sleeved on the outside of the biopsy needle core 51, the biopsy hose 31 is sleeved on the outside of the cutting hose 41, the second handle wheel 4 is fixedly arranged on the top of the cutting hose 41, and the top of the biopsy hose 31 is fixedly sleeved with the third handle 3; wherein,
referring again to fig. 2A, and 3-5, biopsy hose 31, cutting hose 41, and biopsy needle core 51 of second biopsy mechanism assembly 20 are each formed of a vertical column C and a first hooked end (fig. 3), a second hooked end (fig. 4), and a third hooked end (fig. 5) extending from respective ends of third handle 3, second handle wheel 2, and fifth handle 5 on respective vertical columns C and having respective ends a and a hooked portion B.
The biopsy hose 31 shown in fig. 3 has a first hook end, and the end of the first hook end is opened with a second through groove that can be aligned with the second cutting groove.
As shown in fig. 4, a turning spiral structure 44 is disposed at a hook B of a second hook end of the cutting hose 41 of the second biopsy taking mechanism assembly 20, and a tip C of the second hook end is a cutting hose tip 42, and a second cutting groove 43 is disposed on the cutting hose tip 42.
As shown in fig. 5, the biopsy core has a third hooked end.
As shown in fig. 1E and 2A, the second biopsy taking mechanism assembly is formed by sequentially sleeving the third hook end, the second hook end and the first hook end from inside to outside, wherein the hook of the third hook end is made of a shape memory material, and the first hook and the second hook are made of a polymer material or a metal material.
In this embodiment, as shown in fig. 1E,2A,2B, and 3-5, the side surfaces of the third handle 3, the second handle wheel 4, and the fifth handle 5 are provided with a second direction marking line 6. When the three second-direction marking lines 6 are aligned as shown in fig. 2A, it can be ensured that the second cutting grooves 43 and the second passing grooves 32 are aligned (as shown in fig. 2C).
In this embodiment, as shown in fig. 2A,2C, fig. 3 and fig. 4, the second cutting groove 43 and the second passing groove 32 are both square grooves, and the second cutting groove 43 and the second passing groove 32 are both square grooves, so that the intracerebral tissue can be conveniently cut by rotating and dislocating.
In this embodiment, as shown in fig. 1A,1B and 3, the outer surfaces of the working cannula 7 and the biopsy hose 31 are provided with scale marks 11.
In this embodiment, as shown in fig. 1A, the inner diameter of the biopsy tube 31 is the same as the outer diameter of the cutting tube 41, and the inner diameter of the biopsy tube 31 is the same as the outer diameter of the cutting tube 41, so that the intracerebral tissue can be cut off when the second through groove 32 and the second cutting groove 43 are misaligned.
Example 2
One difference of the present embodiment from embodiment 1 is that, as shown in fig. 2B, the second direction marking lines 6 are correspondingly disposed on the upper and lower surfaces of the second handle wheel 4 adjacent to the sides of the fifth handle 5 and the third handle 3, respectively, and when the second direction marking lines 6 on the upper and lower surfaces of the second handle wheel 4 are aligned with the sides of the fifth handle 5 and the third handle 3, respectively, it is also possible to ensure that the second cutting groove 43 and the second passing groove 32 are aligned.
Another difference of the present embodiment from embodiment 1 is that, as shown in fig. 2C, the second cutting groove 43 has three types of cutting blades provided in the notch. And both figures in each row represent the same type. The three figures of the S column and the D column respectively show the stress analysis of the three types of cutting knives rotating the second handle wheel 4 to form the R direction when cutting small-volume tissues and large-volume tissues on the vertical section perpendicular to the paper surface.
As can be seen, the cutters are sharp pointed ends disposed at opposite side edges of the notch, the first and third rows respectively represent first and third types of cutters having a trapezoidal longitudinal section with the sharp corner as a base angle, and the third type of cutters has a lower base edge of the trapezoidal section closer to the second through groove 32 than an upper base edge thereof. The second type of cutting knife represented by the second row is an acute-angle tip formed by splicing the bottom edges of the first type of cutting knife and the third type of cutting knife. When the tips of the three types of cutting knives contact with the tissue and move in the direction R for cutting, the sides of each acute angle form extrusion component elastic force with the surface of the tissue, and the tips form component force along the direction R of the bottom edge (because the tips can be regarded as a micro plane element perpendicular to R in a microcosmic sense instead of a point in a geometric sense, the tips contact with the surface of the tissue to generate the extrusion elastic force in the direction R), so that resultant forces F are formed, and the directions of the resultant forces F of the three types of cutting knives are approximately towards the upper left, the direction R and the lower left, respectively, and the third type of cutting knife is beneficial to cutting the lower tissue due to the inward deviation of the third type of cutting knife towards the second cutting groove 43, so that the preferred geometric shape of the tips of the cutting knives is formed.
Example 3
This embodiment gives the configuration of the first biopsy mechanism assembly described in embodiment 1, which is not otherwise illustrated because the configuration is easily understood in comparison with the first biopsy mechanism assembly. The first biopsy mechanism subassembly of getting still includes biopsy hose, cutting hose and biopsy nook closing member, and all comprises vertical cylinder and each vertical cylinder has first straight end, the straight end of second and the straight end of third respectively, the straight end of second is established to cutting hose point end, the first cutting groove has been seted up on the cutting hose point end, the biopsy hose has first straight end, first straight end is seted up and is passed through the groove with first cutting groove alignment, the biopsy nook closing member has the straight end of third, second, first straight end cup joint from inside to outside in proper order and constitute the first biopsy mechanism subassembly of getting, just the straight end of third, the straight end of second, first straight end are rigid.
The third handle, the second handle wheel and the fifth handle surface of the first biopsy taking mechanism assembly are all provided with first direction marking lines.
The first biopsy mechanism assembly differs in that the hook B and end A of example 1 are formed as a single, rigid, straight end.
The use method and the advantages of the invention are as follows: when the biopsy needle capable of directionally bending and used for extracting the brain tissue lesion is used, the working process is as follows:
referring to fig. 1A to 5, a hook B of a biopsy needle core 51 according to the present invention is a bent cylinder made of a super-elastic memory metal, and can automatically restore an initial bending angle after being straightened by hand during an operation, which is a conventional technique.
When the second biopsy mechanism component is used, the skull is drilled according to the positioned angle and position, the working cannula 7 and the cannula inner core 21 are combined and inserted into a specified position and depth, then the cannula inner core 21 is taken out by using the first handle wheel 2, the biopsy needle core 51 is straightly pulled and inserted into the cutting hose 41 by the nozzle of the cutting hose 41 in a clockwise manner until the bottom end of the biopsy needle core 51 gradually returns to be bent along with the pushing in, and finally enters the tip end 42 of the cutting hose, so that the fifth handle 5 and the second handle wheel 4 can be rotatably buckled, and then the fifth handle 5 and the second direction marking line 6 on the second handle wheel 4 are aligned.
Then, the bent biopsy needle core 51 and the cutting hose 41 are integrally straightened by the nozzle of the biopsy hose 31 and are inserted into the biopsy hose 31 from the sleeving hole, so that the second handle wheel 4 and the third handle 3 can be rotatably buckled, and the second direction marking lines 6 on the second handle wheel 4 and the third handle 3 are aligned and not aligned, thereby ensuring that the adjustment through groove 32 is aligned and overlapped with the cutting groove 43, and obtaining the combined second biopsy taking mechanism assembly.
The hook ends a and B (as shown in fig. 2A) of the assembled second biopsy taking mechanism assembly are straightened (fig. 1E) in the manner described in the embodiment, then the hook ends a and B are pulled out and inserted into the sleeving holes at the top end of the working sleeve 7, when the hook ends a and B extend out of the working sleeve 7, the hook ends a and B are bent by themselves to restore the initial angle and are aligned with the position of the lesion tissue to be sampled in the brain, at this time, the biopsy needle core 51 is pulled out by using the fifth handle 5, negative pressure is generated to make the bulge of the brain tissue enter the second through groove 32 and the second cutting groove 43, the brain tissue can be cut off relatively laborsavingly by rotating the second handle wheel 4, and then the biopsy tissue can be taken out by using the second handle wheel 4 with the biopsy hose 31 pulled out.
The rear end socket hole of the cutting hose 41 is suitable for the front end standard of an injector, can be matched with the size of the front end of the injector, and can be externally connected with the injector for auxiliary use when the negative pressure of the biopsy needle core 51 is not enough to enable tissues to be convex after being pulled out and pulled out.
The present invention relates to circuits, electronic components and control modules all of which are well within the skill of those in the art and, needless to say, the present invention is not directed to software and process improvements.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (15)
1. A directionally bendable biopsy needle kit for extracting brain tissue lesions, the kit comprising one or two sets of penetrating means, and a biopsy taking means, wherein each set of penetrating means comprises a working cannula, a cannula core, a first handle wheel for gripping by both hands to adjust the depth of penetration of the cannula core and the rotation angle of the cannula core, wherein,
a first handle is fixedly installed at the top end of the working sleeve, the sleeve inner core is inserted into the working sleeve, and the first handle wheel is fixedly installed at the top end of the sleeve inner core;
the biopsy taking mechanism comprises a first biopsy taking mechanism component and/or a second biopsy taking mechanism component, the first biopsy taking mechanism component and the second biopsy taking mechanism component both comprise biopsy hoses and third handles, a cutting hose and second handle wheels for being grasped by two hands to control the bottom ends of the biopsy taking mechanisms to penetrate into the working sleeve and adjust the rotating angle of the bottom ends of the cutting hoses, a biopsy needle core and a fifth handle, the third handle is fixedly sleeved at the top ends of the biopsy hoses, the second handle wheels are fixedly installed at the top ends of the cutting hoses, the fifth handle is fixedly installed at the top ends of the biopsy needle core, the cutting hoses are sleeved outside the biopsy needle core, and the biopsy hoses are sleeved outside the cutting hoses; wherein,
the biopsy hose, the cutting hose and the biopsy needle core of the first biopsy taking mechanism assembly are composed of vertical cylinders, each vertical cylinder is respectively provided with a first straight end, a second straight end and a third straight end, the second straight end is set as a cutting hose tip, a first cutting groove is formed in the cutting hose tip, the biopsy hose is provided with a first straight end, the first straight end is provided with a first through groove which can be aligned with the first cutting groove, the biopsy needle core is provided with a third straight end, the second straight end and the first straight end are sequentially sleeved from inside to outside to form the first biopsy taking mechanism assembly, and the third straight end, the second straight end and the first straight end are rigid;
the biopsy hose, the cutting hose and the biopsy needle core of the second biopsy taking mechanism component are composed of a vertical cylinder and a first hook end, a second hook end and a third hook end which extend from one end far away from the third handle, the second handle wheel and the fifth handle on the respective vertical cylinder respectively, a turning spiral structure is arranged at the hook of the second hook end of the cutting hose of the second biopsy taking mechanism component, the end part of the second hook end is set to be a tip end of the cutting hose, a second cutting groove is arranged at the tip end of the cutting hose, a second through groove which can be aligned with the second cutting groove is arranged at the end part of the first hook end, the third hook end, the second hook end and the first hook end are sequentially sleeved from inside to outside to form the second biopsy taking mechanism component, and the hook part of the third hook end is made of a shape memory material, the first hook and the second hook are made of high polymer materials or metal materials.
2. The kit of claim 1, wherein surfaces of said third handle and said second handle wheel of said first biopsy mechanism assembly are each provided with a first directional marking line, and surfaces of said third handle, said second handle wheel, and fifth handle of said second biopsy mechanism assembly are each provided with a second directional marking line for alignment of said first cutting slot and said first pass through slot, and for inter-nesting of said third hook end, said second hook end, said first hook end and said second pass through slot, respectively.
3. The kit of claim 1 or 2, wherein the first wheel of the second biopsy mechanism assembly has a cylindrical bore through which the hooked end of the completed second biopsy mechanism assembly can be assisted in straightening.
4. The kit of claim 3, wherein the cylindrical bore is a plurality of bores, each of which is adapted to independently assist in straightening the hooked end of the assembled second biopsy mechanism assembly.
5. The kit of claim 4, wherein the first through third barb ends are straightened directly by the socket holes of the vertical bodies of the second biopsy mechanism assembly through which the socket is received.
6. The kit of claim 4, wherein the rear end socket of the cutting hose is adapted to a standard syringe front end, and is sized to fit the syringe front end and be used as an accessory when the negative pressure is insufficient to bulge tissue when the biopsy core is withdrawn and withdrawn.
7. The kit of claim 6, wherein the first and second wheels have at least two gripping apertures for facilitating gripping by a finger passing therethrough.
8. The kit of claim 6, wherein the shape memory material is a superelastic memory metal, a memory hydrogel, or a memory polymer material.
9. The kit of claim 6, wherein the outer surfaces of the working cannula and biopsy hose are provided with graduations.
10. The kit of claim 6, wherein the biopsy hose has an inner diameter that is the same as an outer diameter of the cutting hose.
11. The kit of claim 6, wherein the first and second cutting flutes and the first and second through-channels are square channels.
12. The kit of claim 6, wherein the first and second cutting flutes have cutting blades disposed in the notches.
13. The kit of claim 12, wherein the cutting burr includes an acute pointed end disposed at opposite side edges of the notch.
14. The kit as claimed in claim 13, wherein the longitudinal section of the cutting burr is a trapezoid having the acute angle as a base angle.
15. The kit of claim 14, wherein a lower bottom edge of the trapezoid is closer to the first and second through slots than an upper bottom edge.
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