CN113116402A - Bone marrow puncture needle - Google Patents

Abstract

The invention provides a bone marrow puncture needle, which comprises a handle, an outer needle and an inner needle, wherein the handle comprises a depth adjusting mechanism, an inner needle pushing mechanism, an outer needle pushing mechanism and an outer needle pushing mechanism, the inner needle pushing mechanism is clamped with the inner needle, the outer needle pushing mechanism is clamped with the outer needle, the outer needle and the inner needle are hidden in a cavity in the handle, the inner needle is sleeved in the outer needle, the depth adjusting mechanism is arranged at one end of the extended needle point and can adjust the exposed length of the inner needle and the outer needle, the inner needle pushing mechanism can be triggered to eject the inner needle along the axial direction of the handle, the outer needle pushing mechanism can be triggered to eject the outer needle along the axial direction of the handle, the outer needle is clamped with the outer needle pushing mechanism, the outer needle pushing mechanism can retract the outer needle along the handle, the invention can conveniently adjust the sampling depth and can rapidly excite the inner needle and the outer needle, the sampling time is shortened, and the pain of the patient during sampling is relieved.

Description

Bone marrow puncture needle

Technical Field

The invention relates to the field of valve medical instruments, in particular to a marrow puncture needle.

Background

Bone marrow aspiration refers to smear-Ji staining backup after extracting bone marrow fluid with a bone marrow aspiration needle, while bone marrow biopsy refers to a method of sampling bone marrow with a bone marrow biopsy needle, and fixation of embedded sections followed by Jimsa staining backup.

The basic apparatus of the existing bone marrow biopsy is a bone marrow biopsy needle, the operation process of the bone marrow biopsy needle is basically the same as that of a puncture process, and only when sampling is carried out, a needle core needs to be pulled out and then sleeved with a connecting column, then the needle core is inserted, the needle is inserted for a certain distance and then rotated for 2-6 circles, finally the needle is withdrawn, the needle is taken down and connected, and the needle core is used for ejecting bone marrow biopsy tissues.

Sometimes when bone marrow biopsy tissue is difficult to sample, adopt biopsy rifle and marrow pjncture needle cooperation sample, the cooperation relation is complicated, and biopsy rifle quality is great, because interior needle and outer needle control arouse the non-concentric setting of structure, the volume is great, and stability is relatively poor.

Therefore, the bone marrow puncture needle with adjustable depth needs to be invented, the sampling depth can be conveniently adjusted, the inner needle and the outer needle can be quickly excited, the sampling time is shortened, and the pain of a patient during sampling is relieved.

Disclosure of Invention

In view of the above, the present invention is directed to a bone marrow puncture needle to solve the above technical problems.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

the utility model provides a bone marrow puncture needle, includes handle, outer needle and interior needle, the handle includes depth adjustment mechanism, interior needle advancing mechanism, outer needle advancing mechanism and outer needle return push mechanism, interior needle advancing mechanism with interior needle joint, outer needle advancing mechanism with outer needle joint, outer needle with interior needle hide set up in the inside appearance chamber of handle, interior needle holder is located inside the outer needle, the depth adjustment structure set up in the one end that the needle point stretches out, can be right interior needle with the length that outer needle exposes is adjusted, interior needle advancing mechanism can trigger the messenger interior needle pops out along the handle axial, outer needle advancing mechanism can trigger the messenger outer needle pops out along the handle axial, and outer needle with outer needle return push mechanism joint, outer needle return push mechanism can with outer needle is followed the handle is retracted. This setting can avoid manual pricking pathological change tissue with marrow puncture needle, arouses inside and outside needle fast, shortens the sample time, and the misery when alleviating the patient and taking a sample to degree of depth adjustment mechanism can adjust the depth of pricking according to different pathological change positions, the simple operation.

Furthermore, the depth adjusting mechanism comprises an adjusting cylinder and a plurality of adjusting grooves, the adjusting grooves are uniformly formed in one end, extending out of the needle point, of the handle, the adjusting cylinder is sleeved inside the handle, the adjusting cylinder comprises an adjusting clamp arm and a handle, the adjusting clamp arm is arranged at one end, extending into the handle, of the adjusting cylinder and clamped with one of the adjusting grooves, the handle is arranged at one end, extending out of the handle, of the adjusting cylinder, the handle is pushed and pulled, the adjusting clamp arm can be changed to be clamped with the adjusting grooves, and therefore the depth adjusting function is achieved. This setting makes degree of depth adjustment mechanism simple structure, and the joint is stable, the simple operation.

Further, interior needle advancing mechanism includes interior key hole, interior needle button, trip, third spring, fourth spring, interior key hole set up in the tip of handle, interior needle button wears to establish in the interior key hole, can follow interior key hole slides, and with interior needle contact or separation, fourth spring both ends respectively with interior needle button and handle tip butt, the trip by handle tip to the inside appearance chamber of handle extend with interior needle joint, the third spring is followed handle axial butt sets up interior needle with between the handle. The inner needle pushing mechanism plays a role in clamping the inner needle when not triggered, the inner needle is instantly popped out of one end of the handle under the action of spring tension after being triggered, and compared with a case that a person manually pricks lesion tissues, the inner needle pushing mechanism reduces the pain of sampling.

Further, interior needle includes interior needle head and interior needle point, interior needle head hoop is provided with the second draw-in groove, the second draw-in groove with the trip joint, interior needle head tip with third spring butt, interior needle point is worn to establish inside the outer needle, interior needle point department is provided with the recess, can deposit a small amount of pathological changes tissue. The clamping hook and the inner needle joint are clamped to enable the third spring to store force, so that the inner needle can be ejected instantly after being triggered, and the inner needle tip is mainly used for storing pathological tissues.

Further, outer needle advancing mechanism includes outer key hole, outer needle button, first spring, second fixture block, outer key hole sets up on the lateral wall of handle middle part, outer needle button wears to establish in the outer key hole, the second fixture block sets up in the inside appearance chamber of handle, one side with outer needle button fixed connection, the opposite side with the one end butt of first spring, the first spring other end and handle lateral wall butt, the second fixture block with outer needle joint, the second spring is followed handle axial butt sets up outer needle with between the handle. The outer needle pushing mechanism plays a clamping role when not triggering, and the outer needle is popped out of handle one end in the twinkling of an eye under the spring thrust effect after triggering, cuts the pathological change tissue of interior needle point department and gets, compares the people and pricks the pathological change tissue manually the second time and has reduced the misery when taking a sample.

Further, outer needle includes outer needle head and outer needle point, outer needle head wears to establish in the second fixture block, outer needle head hoop is provided with the third draw-in groove, the third draw-in groove with second fixture block joint, outer needle head tip with second spring butt, outer needle point wears to establish in the regulation section of thick bamboo, outer needle point is inside to be worn to be equipped with interior needle point. Should set up the third draw-in groove with second fixture block joint makes the second spring hold power to outer needle point and interior needle point wear to establish the connection and can be convenient for cooperate the sample, and the regulation section of thick bamboo plays the guide effect to inner needle point and outer needle point.

Further, outer needle return push mechanism set up in degree of depth adjustment mechanism with between the outer needle advancing mechanism, including returning the needle groove, pushing away button, first fixture block, return the needle groove and set up on the handle lateral wall, return needle groove one side and be provided with the cockscomb structure spacing groove, it sets up to push away the button the handle outside, first fixture block set up in the inside appearance chamber of handle can connect the joint with outer needle, push away the button with first fixture block is in return needle inslot joint, it can drive to push away the button first fixture block is followed the spacing groove slides, and this setting can make outer needle point back after the sample finishes, exposes the recess of interior needle point, is convenient for take out pathological change tissue and carry out analysis on next step.

Furthermore, first fixture block ring-type is provided with first draw-in groove, outer needle joint tip is provided with the jack catch, the jack catch can with first draw-in groove joint. The device can play a role in positioning when the outer needle tip penetrates into the pathological tissue, and prevent the outer needle tip from moving.

Furthermore, the handle is internally provided with a blocking wall, the blocking wall is arranged between the inner needle propelling mechanism and the outer needle propelling mechanism, one side of the blocking wall is abutted against the second spring, and the other side of the blocking wall is abutted against the third spring. The retaining wall is arranged to enable the second spring to be in a compression state when the outer needle is clamped, and enable the third spring to be in a stretching state when the inner needle is clamped, so that the springs on two sides can be accumulated.

Furthermore, the inner needle pushing mechanism further comprises a safety clamp, the safety clamp is arranged outside the inner needle key, the outer needle pushing mechanism further comprises a safety buckle, and the safety buckle is buckled outside the outer needle key. The arrangement prevents the inner needle key and the outer needle key from being triggered by mistake, and the safety performance is improved.

The marrow puncture needle has the following advantages:

(1) according to the marrow puncture needle, the inner needle and the outer needle are triggered by the inner needle pushing mechanism and the outer needle pushing mechanism, so that an operator is prevented from manually inserting the needles into a patient body, the pain of the patient in biopsy puncture can be relieved, the depth of the inner needle and the depth of the outer needle extending into pathological change tissues are adjusted by the depth adjusting mechanism, errors caused by visual adjustment of human eyes are avoided, and the marrow puncture needle is suitable for different occasions;

(2) the marrow puncture needle provided by the invention does not need to be matched with a biopsy gun for use, can be used for sampling pathological change tissues only, is convenient and quick, and has the advantages of simple structure, reduced mass and small volume compared with the biopsy gun.

(3) According to the bone marrow puncture needle, the inner needle and the outer needle are arranged in a hidden mode, and the inner needle pushing mechanism and the outer needle pushing mechanism are provided with the safety devices, so that accidental triggering is prevented, and the safety performance during biopsy puncture is greatly improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic diagram illustrating a closed state of a bone marrow puncture needle according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a closed state of a bone marrow puncture needle according to an embodiment of the present invention;

FIG. 3 is an enlarged view of the invention at B of FIG. 2;

fig. 4 is a schematic structural view of a push button and a first fixture block according to an embodiment of the present invention;

FIG. 5 is an enlarged view taken at A of FIG. 1 in accordance with the present invention;

FIG. 6 is an enlarged view of FIG. 2 at C;

FIG. 7 is an enlarged view taken at D of FIG. 2 in accordance with the present invention;

FIG. 8 is a schematic view of an inner needle ejection structure according to the present invention;

FIG. 9 is a schematic cross-sectional view of an inner needle ejecting structure according to the present invention;

FIG. 10 is an enlarged view of FIG. 9 taken at E in accordance with the present invention;

FIG. 11 is a schematic view of the inner and outer needle ejection structures of the present invention;

FIG. 12 is a schematic view of the partial cross-sectional structure of the inner and outer needle ejection of the present invention;

FIG. 13 is an enlarged view at F of FIG. 12 in accordance with the present invention;

FIG. 14 is a schematic view of the outer needle retraction arrangement of the present invention;

FIG. 15 is a schematic view of the outer needle retraction in partial cross-section according to the present invention;

FIG. 16 is a schematic view of the inner and outer needle ejection structures after depth adjustment according to the present invention;

fig. 17 is a partial sectional view showing the ejection of the inner needle and the outer needle after the depth adjustment according to the present invention.

Description of reference numerals:

1. a handle; 11. an adjustment groove; 12. a needle returning groove; 121. a push button; 1211. a connecting projection; 1212. a stopper; 122. a first clamping block; 1221. a first card slot; 1222. a fixed protrusion; 1223. clamping a pin; 1224. a clamp spring; 1225. connecting grooves; 123. a limiting groove; 13. an outer key hole; 131. a safety buckle; 132. an outer needle key; 133. a second fixture block; 134. a fixed part; 135. a first spring; 14. a retaining wall; 141. a second spring; 15. an inner needle key; 151. a safety clip; 152. a fourth spring; 153. a trigger end; 154. a key end; 16. an inner needle clamping arm; 161. a third spring; 17. an inner key hole; 171. a hook is clamped; 2. an adjusting cylinder; 20. adjusting the clamping arm; 21. a lug; 22. a handle; 23. calibration; 24. a pinhole; 25. a guide portion; 3. an inner needle; 31. an inner needle tip; 32. an inner needle joint; 321. a snap ring; 322. a second card slot; 4. an outer needle; 41. an outer needle tip; 42. an outer needle hub; 421. a third card slot; 422. a claw is provided.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

The descriptions of "first," "second," "inner," "outer," "upper," "lower," "left," "right," and the like in this disclosure are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating a number of technical features being indicated. In addition, the technical solutions in the embodiments may be combined with each other, but it is necessary that a person skilled in the art can realize the combination, and the technical solutions in the embodiments are within the protection scope of the present invention.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

In a specific embodiment, as shown in fig. 1 and 2, a bone marrow puncture needle comprises a handle 1, an outer needle 4 and an inner needle 3, wherein the handle 1 is cylindrical and comprises a depth adjusting mechanism, an inner needle pushing mechanism, an outer needle pushing mechanism and an outer needle pushing mechanism, the depth adjusting mechanism, the outer needle pushing mechanism and the inner needle pushing mechanism are sequentially arranged in a cavity in the handle 1, the inner needle pushing mechanism is clamped with the inner needle 3, the outer needle pushing mechanism is clamped with the outer needle 4, the outer needle 4 and the inner needle 3 are hidden in the cavity in the handle 1, the inner needle 3 is sleeved in the outer needle 4, the depth adjusting mechanism is arranged at one end where a needle point extends out and can adjust the length of the inner needle 3 and the outer needle 4 which are exposed out; interior needle advancing mechanism can trigger the messenger 3 needle points of interior needle are popped out to handle 1 outside along 1 axial of handle, outer needle advancing mechanism can trigger the messenger 4 needle points of outer needle are popped out handle 1 outside along 1 axial of handle, and outer needle 4 with outer needle return pushing mechanism joint, outer needle return pushing mechanism can be with outer needle 4 along 1 axial of handle retraction.

Furthermore, the depth adjusting mechanism comprises an adjusting cylinder 2 and a plurality of adjusting grooves 11, the adjusting grooves 11 are uniformly distributed at one end of the handle 1 where the needle point extends along the axial direction of the handle 1, the adjusting cylinder 2 is cylindrical, is sleeved inside the handle 1, has a closed end and an open end, is provided with a needle hole 24 at the center, the needle hole 24 is a through hole, the adjusting cylinder 2 comprises an adjusting clamp arm 20, a handle 22 and a guide part 25, the adjusting clamp arm 20 is arranged at one end of the adjusting cylinder 2 extending into the handle 1, and is in an arm shape for extending the side wall of the adjusting cylinder 2, the adjusting clamp arm 20 can deform in the clamping process, the adjusting device is clamped with or separated from the adjusting grooves 11, one end of the adjusting clamping arm 20 is an open end, a lug 21 is arranged on the adjusting clamping arm 20, the lug 21 is clamped with one of the adjusting grooves 11, the lug 21 is provided with a chamfer, the cross section is trapezoidal, and the lug can be conveniently clamped into the adjusting grooves 11 or separated from the adjusting grooves 11; the handle 22 is arranged at one end of the adjusting cylinder 2 extending out of the handle 1, the end part of the adjusting cylinder 2 extending out of the handle 1 is closed, and is contacted with the skin in the biopsy puncture process to play a positioning role, the handle 22 is a protrusion which is symmetrically arranged, so that the force is applied by hand in the depth adjustment process, the handle is pushed and pulled, the adjusting clamp arm 20 can be clamped with the adjusting groove 11 at the corresponding position, and the depth adjustment function is realized; the guide part 25 extends to the open end along the closed end of the adjusting cylinder 2, the needle hole 24 penetrates through the guide part 25, the inner needle 3 and the outer needle 4 penetrate through the needle hole 24 in the guide part 25 and can be ejected along the needle hole 24, and the guide part 25 plays a role in guiding when the inner needle 3 and the outer needle 4 are ejected, so that the needle is prevented from being inclined; preferably, a plurality of adjustment grooves 11 are provided with two, set up about handle 1 axis symmetry, and corresponding regulation card arm 20 symmetry is provided with two, can the joint more stable to the application of force is even during the regulation, and the regulation section of thick bamboo 2 lateral wall is provided with scale 23, can show the depth that the needle point will insert pathological change tissue when adjusting section of thick bamboo 2 and adjusting.

Further, as shown in fig. 1, 2 and 7, the inner needle pushing mechanism includes an inner key hole 17, an inner needle button 15, a hook 171, a third spring 161 and a fourth spring 152, the inner key hole 17 is axially disposed at an end of the handle 1, the inner needle button 15 is disposed in the inner key hole 17 in a penetrating manner, can slide along the inner key hole 17, and is in contact with or separated from the inner needle 3, the inner needle button 15 includes a trigger end 153 and a button end 154, and is disposed in an i-shaped manner, the trigger end 153 is disposed inside the handle 1 and can trigger the inner needle 3 to pop out, the button end 154 is disposed outside the handle 1, the fourth spring 152 is disposed outside a neck of the inner needle button 15 in a sleeved manner, one end of the fourth spring is abutted against the button end 154, and one end of the fourth spring is abutted against an outer side of the end of the handle 1 and plays a supporting role for the inner needle button 15 to prevent the inner needle button 15 from moving at will, the hook 171 axially extends from an end of the handle 1 to, and is clamped with the inner needle 3; the third spring 161 is disposed between the inner needle 3 and the handle 1 in an abutting manner along the axial direction of the handle 1.

Further, the inner needle 3 comprises an inner needle joint 32 and an inner needle tip 31, the inner needle joint 32 is cylindrical, a second clamping groove 322 is annularly arranged, the second clamping groove 322 is clamped with the clamping hook 171, the end of the inner needle joint 32 is abutted against the third spring 161, a groove is formed in the position of the inner needle tip 31 and can store a small amount of lesion tissues, and the inner needle tip 31 penetrates through the inner part of the outer needle 4;

in this embodiment, a blocking wall 14 is vertically and axially arranged inside the handle 1, the blocking wall 14 is arranged between the inner needle pushing mechanism and the outer needle pushing mechanism, one end of a third spring 161 is fixedly connected with the blocking wall 14, the other end of the third spring 161 is fixedly connected with the inner needle connector 32, when the second clamping groove 322 is clamped with the clamping hook 171, the third spring 161 is in a stretching state, the key end 154 is pressed, the trigger end 153 presses the inner needle 3 to separate the inner needle from the clamping hook 171, at this time, under the action of the third spring 161, the inner needle connector 32 moves towards the needle hole 24, and at the same time, the inner needle tip 31 is ejected along the needle hole 24 under the action of the third spring 161;

preferably, an inner needle clamping arm 16 is further arranged between the blocking wall 14 and the inner needle propelling mechanism, the inner needle clamping arm 16 is an extension arm which is symmetrically arranged in the inner diameter direction of the handle 1, a chamfer is arranged at the upper part of the inner needle clamping arm, a snap ring 321 is further annularly arranged on the inner needle joint 32, the cross section of the snap ring 321 is trapezoidal, the inner needle 3 can be clamped with the inner needle clamping arm 16 after being popped out, the position fixation is completed, the inner needle point 31 is prevented from moving along lesion tissues, and at the moment, the third spring 161 is in a compressed state;

preferably, interior needle advancing mechanism still includes safety clamp 151, and safety clamp 151 is for having open-ended annular structure, and safety clamp 151 joint is in interior needle button 15 neck outside, and one end supports holds handle 1 tip, and one end supports holds button end 154, prevents that interior needle button 15 from triggering by mistake, improves the security performance, during the use, takes off safety clamp 151.

Further, as shown in fig. 1, 2 and 6, the outer needle pushing mechanism includes an outer key hole 13, an outer needle key 132, a first spring 135, a second spring 141, and a second latch 133, the vertical axis of the outer key hole 13 is arranged on the side wall of the middle part of the handle 1, the outer needle key 132 is arranged in the outer key hole 13 in a penetrating way, the second fixture block 133 is arranged in the cavity inside the handle 1, one side of the second clamping block 133 is fixedly connected with the outer needle button 132, the other side of the second clamping block is abutted against one end of the first spring 135, the second clamping block 133 is cylindrical, a clamping table is arranged on the inner side wall of one side abutting against the first spring 135, the section of the clamping table is trapezoidal, used for being clamped with the outer needle 4, the other end of the first spring 135 is abutted against the side wall of the handle 1, the side wall of the handle 1 is provided with a fixed part 134 which can contain the first spring 135 and is fixedly connected with one end thereof, the second spring 141 is disposed between the outer needle 4 and the handle 1 in an abutting manner in the axial direction of the handle.

Further, outer needle 4 includes outer needle head 42 and outer needle point 41, outer needle head 42 wears to establish in second fixture block 133, and outer needle head 42 hoop is provided with third fixture groove 421, third fixture groove 421 with second fixture block 133's ka tai joint, outer needle head 42 tip with second spring 141 butt, outer needle point 41 are hollow, and the setting is run through with outer needle head 42's hole in the internal orifice for interior needle point 31 wears out to outer needle point 41 from outer needle head 42, and outer needle point 41 wears to establish in pinhole 24, can follow pinhole 24 and stretch out outside handle 1.

One end of the second spring 141 is fixedly connected with one side of the blocking wall 14 far away from the third spring 161, and the other end is fixedly connected with the inner needle joint 32, when the third clamping groove 421 is clamped with the second clamping block 133, the second spring 141 is in a compressed state, the inner needle key 132 is pressed, the clamping table of the second clamping block 133 is separated from the third clamping groove 421, the outer needle 4 is axially ejected out along the handle 1 under the elastic action of the second spring 141, and the outer needle joint 42 is further provided with a clamping jaw 422 which can be clamped with the outer needle pushing mechanism.

Preferably, outer needle advancing mechanism still includes safety buckle 131, and the outer key hole 13 outside still is provided with the boss, and safety buckle 131 lock is in outer key hole 13 department, with boss joint or spiro union, prevents outer needle button 132 spurious triggering, improves the security performance, during the use, takes off safety buckle 131.

Further, as shown in fig. 1 to 5, the outer needle pushing mechanism is disposed between the depth adjusting mechanism and the outer needle pushing mechanism, and includes a needle returning groove 12, a pushing button 121, and a first fixture block 122, the needle returning groove 12 is axially disposed on the sidewall of the handle 1, a sawtooth-shaped limiting groove 123 is disposed on one side of the needle returning groove 12, the pushing button 121 is disposed on the outer side of the handle 1, the first fixture block 122 is disposed in the cavity inside the handle 1, the pushing button 121 and the first fixture block 122 are clamped in the needle returning groove 12, the pushing button 121 can drive the first fixture block 122 to slide along the limiting groove 123, the first fixture block 122 is annular, a first clamping groove 1221 is disposed inside the first clamping groove 1221, a chamfer is disposed at an end portion close to the first clamping groove 1221, and the first clamping groove 1221 is clamped and fixed to a clamping claw 422 on the outer needle joint 42;

preferably, a fixing protrusion 1222, a clamping leg 1223, a clamping spring 1224 and a connecting groove 1225 are disposed at a connection portion of the first fixture block 122 and the push button 121, the fixing protrusion 1222 and the surface of the first fixture block 122 are integrally formed, and are disposed along a width direction of the first fixture block 122, the clamping leg 1223 and the fixing protrusion 1222 are fixedly connected at an angle, the clamping leg 1223 and the surface of the first fixture block 122 are not connected, so that the clamping leg 1223 can be deformed, the fixing protrusion 1222 and the clamping leg 1223 are disposed in two sets and are symmetrically disposed, the connecting groove 1225 is disposed between the two clamping legs 1223, the connecting groove 1225 is clamped with the push button 121, the clamping leg 1223 and the connecting groove 1225 are disposed therebetween, the two clamping legs 1224 are wrapped on the clamping leg 1223, when the push button 121 is pushed or pulled, the clamping leg 1223 is deformed and drives the clamping spring 1224 to move along the limiting groove 123, the push button 121 stops moving, the clamping leg 1223 and the clamping spring are limited by the limiting groove 123, the connecting protrusion 1211 is engaged with the connecting groove 1225, the stopper 1212 is disposed between the two locking legs 1223 for abutting against the locking spring 1224, and the arrangement can push the locking legs 1223 and the locking spring 1224 to deform when the push button 121 applies a force, so as to move along the limiting groove 123, and enable the first locking block 122 to drive the outer needle 4 to move axially along the needle returning groove 12 toward the handle 1.

The specific operation steps are as follows:

the bone marrow puncture needle is in an unused state, as shown in fig. 1-7, the inner needle 3 and the outer needle 4 are hidden in the inner cavity of the handle 1, the adjusting clamping arm 20 of the adjusting cylinder 2 is clamped with the adjusting groove 11 far away from the extending direction of the needle point through the lug 21, the depth adjusting mechanism is in an original state, the safety buckle 131 is buckled outside the outer key hole 13, the safety clamp 151 is clamped at the neck of the inner needle key 15, the clamping hook 171 in the handle 1 is clamped with the second clamping groove 322, the third spring 161 is in a stretching state, the clamping table in the second clamping block 133 is clamped with the third clamping groove 421 under the abutting action of the first spring 135, the second spring 141 is in a compressing state, and the push button 121 and the first clamping block 122 are arranged at one end of the needle returning groove 12 close to the extending direction of;

the inner needle 3 of the bone marrow puncture needle is in a popup state, as shown in fig. 8-10, the safety buckle 131 and the safety clip 151 are taken down, the closed end of the adjusting cylinder 2 is contacted with the skin, the inner needle key 15 is pressed, the triggering end 153 extrudes the inner needle joint 32 to separate the clamping hook 171 from the second clamping groove 322, the third spring 161 enables the inner needle tip 31 to be popped out of the cavity of the handle 1 under the action of elasticity to be inserted into the biopsy puncture site, and a small amount of pathological tissue is filled into the groove of the inner needle tip 31 until the clamping ring 321 is clamped and limited with the inner needle clamping arm 16;

the outer needle 4 of the bone marrow puncture needle is in an ejecting state, as shown in fig. 11-13, the outer needle button 132 is pressed, the second fixture block 133 extrudes the first spring 135, so that the clamping table in the second fixture block 133 is separated from the third clamping groove 421, the second spring 141 enables the outer needle tip 41 to eject out of the cavity of the handle 1 under the action of elastic force, the biopsy puncture site is punctured until the clamping jaw 422 is clamped with the first clamping groove 1221 in the first fixture block 122, and the lesion tissue in the groove of the inner needle tip 31 is cut and separated in the puncturing process;

the outer needle 4 of the bone marrow puncture needle is in a retraction state, as shown in fig. 14-15, the bone marrow puncture needle is taken out from the biopsy puncture site, the push button 121 is forced to move along the needle return groove 12 in the direction away from the needle point, the outer needle point 41 is retracted to expose the groove of the inner needle point 31, and at this time, the lesion tissue sample is taken out for pathological analysis;

in the above process, the adjusting cylinder 2 of the depth adjusting mechanism is in the original position, at this time, the depth of the needle point inserted into the lesion tissue is the largest after extending, in fig. 16-17, the adjusting cylinder 2 is pulled along the extending direction of the needle point, so that the lug 21 on the adjusting clamp arm 20 is replaced into the adjusting groove 11 close to the extending direction of the needle point, because the clamping position is unchanged after the inner needle joint 32 and the outer needle joint 42 are ejected, the length of the inner needle point 31 and the length of the outer needle point 41 which are ejected are reduced, the depth of the inserted lesion tissue is reduced, the depth of the lesion tissue needs to be determined by matching with image detection, the adjusting cylinder 2 is adjusted according to the scale 23, and the inner needle key 15 and the outer needle key 132 are triggered after the adjustment.

The biopsy puncture process of lesion tissues is simple, convenient and quick due to the arrangement, the sampling time can be shortened, the pain of a patient during biopsy puncture is relieved, the sampling depth can be adjusted according to different lesion tissues, the biopsy puncture device is suitable for detection of various parts, and the inner needle pushing mechanism and the outer needle pushing mechanism are approximately positioned on the same axis, so that the whole mass distribution is uniform, and the stability is good.

Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims (10)

1. The marrow puncture needle comprises a handle (1), an outer needle (4) and an inner needle (3), and is characterized in that the handle (1) comprises a depth adjusting mechanism, an inner needle advancing mechanism, an outer needle advancing mechanism and an outer needle pushing-back mechanism, the inner needle advancing mechanism is connected with the inner needle (3) in a clamping manner, the outer needle advancing mechanism is connected with the outer needle (4) in a clamping manner, the outer needle (4) and the inner needle (3) are arranged in a cavity inside the handle (1) in a hidden manner, the outer needle (4) is sleeved outside the inner needle (3), the depth adjusting mechanism is arranged at one end where a needle point extends out and can adjust the length of the inner needle (3) and the outer needle (4) exposed out, the inner needle advancing mechanism can trigger the inner needle (3) to be axially ejected out along the handle (1), and the outer needle advancing mechanism can trigger the outer needle (4) to be axially ejected out along the handle (1), pop out back outer needle (4) with outer needle pushes back the mechanism joint, outer needle push back the mechanism can with outer needle (4) are followed handle (1) are retracted.

2. The bone marrow puncture needle according to the claim 1, characterized in that the depth adjusting mechanism comprises an adjusting cylinder (2) and a plurality of adjusting grooves (11), the adjusting grooves (11) are axially and uniformly distributed at one end of the handle (1) from which the needle point extends, the adjusting cylinder (2) is sleeved inside the handle (1), the adjusting cylinder (2) comprises an adjusting clamp arm (20) and a handle (22), the adjusting clamp arm (20) is arranged at one end of the adjusting cylinder (2) extending into the handle (1) and is clamped with one of the adjusting grooves (11), the handle (22) is arranged at one end of the adjusting cylinder (2) extending out of the handle (1), and the adjusting clamp arm (20) can be clamped by replacing the adjusting groove (11) by pushing and pulling the handle (22).

3. The bone marrow puncture needle according to claim 1, wherein the inner needle advancing mechanism comprises an inner key hole (17), an inner needle key (15), a hook (171), a third spring (161) and a fourth spring (152), the inner key hole (17) is arranged at the end part of the handle (1), the inner needle key (15) is arranged in the inner key hole (17) in a penetrating way and can slide along the inner key hole (17), and is contacted with or separated from the inner needle (3), two ends of the fourth spring (152) are respectively abutted with the inner needle key (15) and the end part of the handle (1), the clamping hook (171) axially extends from the end part of the handle (1) to the cavity in the handle (1), with interior needle (3) joint, third spring (161) are followed handle (1) axial sets up and butt be in interior needle (3) with between handle (1).

4. The bone marrow puncture needle according to the claim 3, characterized in that the inner needle (3) comprises an inner needle joint (32) and an inner needle tip (31), the inner needle joint (32) is annularly provided with a second clamping groove (322), the second clamping groove (322) is clamped with the clamping hook (171), the end part of the inner needle joint (32) is abutted against the third spring (161), the inner needle tip (31) is arranged inside the outer needle (4) in a penetrating way, and a groove is arranged at the inner needle tip (31) and can store a small amount of pathological tissues.

5. The bone marrow puncture needle according to claim 4, wherein the outer needle advancing mechanism comprises an outer key hole (13), an outer needle key (132), a first spring (135), a second spring (141), a second latch (133), the outer key hole (13) is arranged on the side wall of the middle part of the handle (1), the outer needle key (132) is arranged in the outer key hole (13) in a penetrating way, the second fixture block (133) is arranged in the inner cavity of the handle (1), one side of the second fixture block is fixedly connected with the outer needle key (132), the other side of the second fixture block is abutted against one end of the first spring (135), the other end of the first spring (135) is abutted against the side wall of the handle (1), the second clamping block (133) is clamped with the outer needle (4), the second spring (141) is arranged between the outer needle (4) and the handle (1) in an axial abutting mode along the handle (1).

6. The bone marrow puncture needle according to the claim 5, characterized in that the outer needle (4) comprises an outer needle joint (42) and an outer needle point (41), the outer needle joint (42) is arranged in a second clamping block (133) in a penetrating manner, a third clamping groove (421) is annularly arranged on the outer needle joint (42), the third clamping groove (421) is clamped with the second clamping block (133), the end part of the outer needle joint (42) is abutted against the second spring (141), the outer needle point (41) is arranged in the adjusting cylinder (2) in a penetrating manner, and the inner needle point (31) is arranged in the outer needle point (41) in a penetrating manner.

7. The bone marrow puncture needle according to claim 6, wherein the outer needle pushing mechanism is arranged between the depth adjusting mechanism and the outer needle pushing mechanism and comprises a needle returning groove (12), a push button (121) and a first fixture block (122), the needle returning groove (12) is axially arranged on the side wall of the handle (1), a sawtooth-shaped limiting groove (123) is arranged on one side of the needle returning groove (12), the push button (121) is arranged on the outer side of the handle (1), the first fixture block (122) is arranged in the inner cavity of the handle (1) and can be clamped with the outer needle joint (42), the push button (121) and the first fixture block (122) are clamped in the needle returning groove (12), and the push button (121) can drive the first fixture block (122) to slide along the limiting groove (123).

8. The bone marrow puncture needle according to the claim 7, characterized in that, the first clamping block (122) is annularly provided with a first clamping groove (1221), the end part of the outer needle joint (42) is provided with a claw (422), and the claw (422) can be clamped with the first clamping groove (1221).

9. A bone marrow puncture needle according to claim 6, characterized in that a blocking wall (14) is provided inside the handle (1), the blocking wall (14) is provided between the inner needle advancing mechanism and the outer needle advancing mechanism, one side of the blocking wall (14) abuts against the second spring (141), and the other side of the blocking wall (14) abuts against the third spring (161).

10. The bone marrow puncture needle according to claim 5, characterized in that, the inner needle propulsion mechanism further comprises a safety clip (152), the safety clip (152) is sleeved outside the inner needle button (15), the outer needle propulsion mechanism further comprises a safety buckle (131), and the safety buckle (131) is buckled outside the outer needle button (132).

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