CN111358505B - A minimally invasive bone marrow biopsy needle - Google Patents

Abstract

The invention provides a minimally invasive bone marrow biopsy sampling needle, which comprises a needle tube, a first needle core and a second needle core, wherein the tail part of the needle tube is provided with a main handle, the tail parts of the first needle core and the second needle core are respectively provided with an auxiliary handle, the front end of the first needle core is provided with a triangular pyramid head, the center of the first needle core is provided with a first channel which is arranged to the end surface of the tail part of the first needle core, and three conical surfaces of the triangular pyramid head are respectively provided with a connecting channel which is communicated with the first channel; the center of the second stylet is provided with a second channel which is communicated with the second stylet, the inner cylindrical wall at the end part of the front end of the second stylet is provided with a separation cone, the cone tip of the separation cone faces the center of the second stylet, and the separation cone is in a triangular pyramid shape. The invention has the advantages of capability of simultaneously carrying out bone marrow smear examination and bone marrow biopsy in one puncture, reliable use, capability of effectively reducing the pain of patients and high success rate of taking out bone marrow.

Description

A minimally invasive bone marrow biopsy needle

technical field

The invention relates to the field of medical equipment, belongs to medical technology A61M, and specifically relates to a minimally invasive bone marrow biopsy needle.

Background technique

The minimally invasive bone marrow biopsy needle can be used to aspirate bone marrow fluid for bone marrow smear examination, and can also be used to extract bone marrow for bone marrow biopsy. When operating, first disinfect the skin surface and apply anesthetics. First, insert the needle body used for drilling into the needle tube to expose the needle head, and then insert the needle body and the needle tube into the skin until the surface of the bone, and rotate the needle body and the needle tube synchronously. The needle body drills through the bone surface and guides the front end of the needle tube into the bone. After drilling, the needle body is pulled out to extract bone marrow fluid or the needle tube is inserted into the bone marrow needle tube to further rotate the needle tube to extract bone marrow, and then the bone marrow needle tube is pulled out to take out the bone marrow...; However, after drilling During this period, the needle will squeeze the bone powder and discharge it to the bone surface from the back, which will easily cause the bone powder to enter the subcutaneous soft tissue or synovial layer, and may cause bumps after the operation; at the same time, when the bone marrow is removed, the bone marrow that has been cut out by the needle tube will be in a cylindrical shape. directly pull out the bone marrow needle tube because the cut out bone marrow column and the bone marrow inside the bone are still in a state of adhesion and cannot be taken out, so only a second needle insertion can be performed, which reduces the quality of bone marrow extraction.

Contents of the invention

Based on the above problems, the purpose of the present invention is to provide a minimally invasive bone marrow biopsy sampling needle that can perform bone marrow smear examination and bone marrow biopsy in one puncture, is reliable in use, can effectively reduce patient pain, and has a high success rate of bone marrow extraction.

In view of the above problems, the following technical solutions are provided: a minimally invasive bone marrow biopsy sampling needle, comprising a needle tube, a first needle core and a second needle core, the tail of the needle tube is provided with a main handle, the first needle core, the second needle core The tail of the needle core is provided with an auxiliary handle, the front end of the first needle core is provided with a triangular cone head, the center of the first needle core is provided with a first channel opened to the end face of its tail, and the three cone heads of the three edge The conical surface is provided with a connecting channel communicating with the first channel; the center of the second needle core is provided with a second channel opened oppositely, and the inner cylindrical wall at the front end of the second needle core is provided with a separation channel. Cone, the cone point of the separation cone faces the center of the second needle core, the separation cone is a triangular pyramid, and its three triangular faces are respectively the first face, the second face and the third face, the first face and the second face The two surfaces are butted with each other to form a first circumferential edge line, the first surface and the third surface are butted with each other to form a second circumferential edge line, and the first circumferential edge line and the second circumferential edge line are formed in a second circumferential edge line. When the center of the needle core is the center of the circle, the planes of rotation coincide with each other, and the sides of the second surface and the third surface butt each other to form an axial edge line, and the axial edge line is located on the side of the first surface facing the front end of the second needle core.

In the above structure, when piercing, the connecting channel on the triangular vertebral head is used to accommodate the bone powder generated during drilling and discharge it into the first channel, which improves chip removal efficiency, reduces drilling resistance, and makes drilling easier , to reduce the accumulation of bone powder on the surface of the bone, which is conducive to postoperative recovery and prevents bone powder from entering the subcutaneous soft tissue or synovial layer. Dip the anesthetic on the triangular vertebral head, so that part of the anesthetic is temporarily stored in the connecting channel and the first channel, or directly supply the anesthetic through the first channel when the anesthetic fails or the anesthesia is not in place, and can be directly anesthetized again; Separating vertebrae can cut the bone marrow in the second needle core by rotating the second needle core when the bone marrow is taken out, so as to reduce or completely cut off the bone marrow in the second needle core. The connection area with the bone marrow inside the bone can also play the role of covering the end face of the bone marrow inside the second needle core when pulling out the second needle core, so that the bone marrow can be taken out when the second needle core is pulled out, thereby improving the success rate of extraction , the axial edge line can be cut along the axial direction of the second needle core and located in the bone marrow when the second needle core is inserted to reduce resistance.

The present invention is further provided that, the auxiliary handle of the first needle core is provided with a first constant-pressure port communicating with the first channel, and the first constant-pressure port is provided with a first shut-off device.

In the above structure, the first constant pressure port can inject anesthetics into the first channel when the anesthesia is not in place, and at the same time, when the operation is completed and the first needle core and needle tube are pulled out, it can be blocked by the first shut-off device, which facilitates the passage of negative pressure. The bone meal tissue in the connection channel and the first channel is brought out under pressure, avoiding the possibility of bringing out the bone powder on the bone surface to the muscle tissue and synovial layer when the traditional needle and needle tube are pulled out.

The present invention is further provided that, the secondary handle of the second needle core is provided with a second constant pressure port communicated with the second channel, and the second constant pressure port is provided with a second shut-off device.

In the above structure, the second constant pressure port can generate negative pressure by blocking the second shutoff device when extracting the bone marrow, further improving the extraction success rate; at the same time, when the second needle core is inserted into the needle tube, the second shutoff device is removed to balance the pressure difference It avoids piston effect and facilitates the removal of bone marrow from the second needle core.

The present invention is further provided that the first shut-off device and the second shut-off device are respectively blocked in the first constant pressure port or the second constant pressure port, both of which are T-shaped plugs.

In the above structure, the T-shaped plug is a rubber plug, which can be disassembled as required.

The present invention is further provided that, the side of the main handle facing away from the front end of the needle tube is provided with a main stopper, and the side of the auxiliary handle facing the front end of the first needle core or the second needle core is provided with a secondary stopper; the first needle When the core or the second needle core is inserted into the needle tube, the side of the main stopper facing away from the front end of the needle tube is against the auxiliary handle, and at the same time, the side of the auxiliary stopper facing the front end of the first needle core or the second needle core is against the main stopper to control the second needle core. The axial position of the first needle core and the second needle core when inserted into the needle tube, and at the same time, the side of the main stopper and the side of the auxiliary stopper are opposed to prevent the relative rotation of the needle tube and the first needle core or the second needle core when drilling.

The present invention is further provided that the side of the main handle facing the auxiliary handle and the side of the auxiliary handle facing the main handle are both provided with magnetic pieces that attract each other.

In the above structure, the main handle and the auxiliary handle are attracted to each other through the magnetic parts, which can avoid loosening.

The present invention is further provided that, the side of the main handle facing away from the front end of the needle tube is provided with a tapered hole coaxially arranged with the needle tube, and on the side handles of the first needle core and the second needle core, the side facing the main handle is evenly It is provided with a vertebral platform coaxial with the axis of the first needle core or the second needle core and adapted to the tapered hole when the main handle and the auxiliary handle are engaged with each other.

In the above structure, when the first needle core or the second needle core is inserted into the needle tube, it can prevent blood or bone marrow fluid from entering the gap between the inner wall of the needle tube and the outer wall of the first needle core or between the inner wall of the needle tube and the second needle through the cooperation of the vertebral platform and the taper hole. The gap between the outer walls of the core seeps out.

In the present invention, it is further provided that the front section of the second needle core is provided with a material-taking notch divided 180 degrees along its circumferential direction.

In the above structure, the compression of the bone marrow when the second needle core is inserted can be reduced.

In the present invention, it is further provided that the separation cone is located at the middle position in the circumferential direction of the inner wall of the front end of the second needle core where no material retrieving groove is provided.

In the above structure, the shielding ability of the separated vertebra to the bone marrow can be improved when the second needle core is pulled out.

Beneficial effects of the present invention: when piercing, the connecting channel on the triangular vertebral head is used to accommodate the bone powder produced during drilling and discharge it into the first channel to improve chip removal efficiency, reduce drilling resistance, and make drilling It is easier to reduce the accumulation of bone powder on the bone surface, which is beneficial to postoperative recovery and prevents bone powder from entering the subcutaneous soft tissue or synovial layer. At the same time, in order to ensure the reliability of anesthesia and avoid pain due to insufficient anesthesia during puncture, it can be drilled Before dipping the anesthetic on the triangular vertebral head, part of the anesthetic is temporarily stored in the connecting channel and the first channel, or if the anesthetic fails or the anesthesia is not in place, the anesthetic is directly supplied through the first channel, and it can be directly performed again. Anesthesia; the separation vertebra can cut the bone marrow located in the second needle core by rotating the second needle core when the bone marrow is taken out, and the first circumferential edge line or the second circumferential edge line can be promoted to reduce or completely cut off the bone marrow located in the second needle core The connection area between the inner bone marrow and the inner bone marrow can also play a role in blocking the end surface of the bone marrow located in the second needle core when the second needle core is pulled out, so that the bone marrow can be taken out when the second needle core is pulled out, thus improving the extraction process. To improve the success rate, the axial edge line can be cut in the bone marrow along the axial direction of the second needle core when the second needle core is inserted to reduce resistance.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the combined state of the needle tube and the first needle core of the present invention.

Fig. 2 is a schematic structural diagram of the combined state of the needle tube and the second needle core of the present invention.

Fig. 3 is a partial cross-sectional structural schematic diagram of the combined state of the needle tube and the first needle core of the present invention.

Fig. 4 is a schematic diagram of the partial structure of the combined state of the needle tube and the second needle core of the present invention.

Fig. 5 is a schematic diagram of the structure of the needle tube of the present invention.

Fig. 6 is a schematic diagram of a full sectional structure of the needle tube of the present invention.

Fig. 7 is a schematic diagram of the structure of the first needle core of the present invention.

Fig. 8 is a schematic diagram of a full sectional structure of the first needle core of the present invention.

Fig. 9 is a schematic diagram of the structure of the second needle core of the present invention.

Fig. 10 is a schematic diagram of a full cross-sectional structure of the second needle core of the present invention.

Fig. 11 is a schematic diagram of the structure of the separated vertebra of the present invention.

Fig. 12 is a schematic diagram of the enlarged structure of part A of Fig. 3 of the present invention.

Fig. 13 is a schematic diagram of the enlarged structure of part B in Fig. 4 of the present invention.

FIG. 14 is a schematic diagram of an enlarged structure of part C in FIG. 8 of the present invention.

Meanings of symbols in the figure: 10-needle tube; 11-main handle; 12-main stopper; 13-taper hole; 20-first needle core; 21-triangular cone head; 22-first channel; 23-connecting channel; 30-second needle core; 31-second channel; 32-separation vertebra; 321-first face; 322-second face; 323-third face; 324-first circumferential edge line; 325-second week Toward edge line; 326-axial edge line; 33-feeding slot; 40-secondary handle; 41-first constant pressure port; 42-first shut-off device; 43-second constant pressure port; 44-secondary block block; 45-magnetic piece; 46-vertebral platform.

Detailed ways

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

Referring to Fig. 1 to Fig. 14, a minimally invasive bone marrow biopsy sampling needle as shown in Fig. 1 to Fig. 14 includes a needle tube 10, a first needle core 20 and a second needle core 30, and the tail of the needle tube 10 is provided with a main handle 11. Both the first needle core 20 and the second needle core 30 are provided with an auxiliary handle 40 at the tail, the front end of the first needle core 20 is provided with a triangular cone head 21, and the center of the first needle core 20 is provided with a to The first passage 22 on the end face of its tail, the three conical surfaces of the triangular pyramid head 21 are all provided with a connecting passage 23 communicating with the first passage 22; The second channel 31, the inner cylinder wall at the front end of the second needle core 30 is provided with a separation cone 32, the cone point of the separation cone 32 faces the center of the second needle core 30, and the separation cone 32 is a triangular pyramid shape, its three triangular surfaces are respectively the first surface 321, the second surface 322 and the third surface 323, the first surface 321 and the second surface 322 butt each other to form the first circumferential edge line 324, the first The surface 321 and the third surface 323 butt against each other to form a second circumferential edge line 325. When the first circumferential edge line 324 and the second circumferential edge line 325 take the center of the second needle core 30 as the center of the circle, their planes of rotation are mutually Coincidentally, the sides of the second surface 322 and the third surface 323 butt against each other to form an axial edge line 326 , and the axial edge line 326 is located on the side of the first surface 321 facing the front end of the second needle core 30 .

In the above structure, when piercing, the connecting channel 23 on the triangular vertebral head 21 is used to accommodate the bone powder generated during drilling and discharge it into the first channel 22, so as to improve chip removal efficiency, reduce drilling resistance, and make the drill It is easier to insert and reduce the accumulation of bone powder on the bone surface, which is beneficial to postoperative recovery and prevents bone powder from entering the subcutaneous soft tissue or synovial layer. Dip the anesthetic on the triangular vertebral head 21 before entering, so that part of the anesthetic is temporarily stored in the connecting channel 23 and the first channel 22, or directly supply the anesthetic through the first channel 22 when the anesthetic fails or the anesthesia is not in place , can be directly anesthetized again; when the bone marrow is taken out, the separating vertebra 32 can rotate the second needle core 30 to promote the first circumferential edge line 324 or the second circumferential edge line 325 to cut the bone marrow located in the second needle core 30 , reduce or completely cut off the connection area between the bone marrow in the second needle core 30 and the bone marrow inside the bone, and when the second needle core 30 is pulled out, it can also play a role in blocking the end surface of the bone marrow in the second needle core 30, so that it is easy to pull out The second needle core 30 will take out the bone marrow, thereby improving the success rate of extraction, and the axial blade line 326 can cut along the axial direction of the second needle core 30 and be located in the bone marrow when the second needle core 30 is inserted, reducing resistance.

In this embodiment, the auxiliary handle 40 of the first needle core 20 is provided with a first constant pressure port 41 communicating with the first channel 22 , and the first constant pressure port 41 is provided with a first intercepting device 42 .

In the above structure, the first constant pressure port 41 can inject anesthetics into the first channel 22 when the anesthesia is not in place, and at the same time, when the operation is completed and the first needle core 20 and needle tube 10 are pulled out, it can be sealed by the first shutoff device 42. It is convenient to take out the bone powder tissue in the connecting channel 23 and the first channel 22 by negative pressure, avoiding the possibility of bringing out the bone powder on the bone surface to the muscle tissue and synovial layer when the traditional needle and needle tube are pulled out.

In this embodiment, the secondary handle 40 of the second needle core 30 is provided with a second constant pressure port 43 communicating with the second channel 31, and the second constant pressure port 43 is provided with a second shut-off device (with The first shut-off device 42 is consistent, so it is not shown in the figure).

In the above structure, the second constant pressure port 43 can generate negative pressure by blocking the second shutoff device when taking out the bone marrow, further improving the extraction success rate; at the same time, the second shutoff device is removed when the second needle core 30 is inserted into the needle tube 10 The balanced pressure difference avoids the piston effect and facilitates the removal of the bone marrow from the second needle core.

In this embodiment, the first shut-off device 42 and the second shut-off device are plugged in the first constant pressure port 41 or the second constant pressure port 43 respectively, both of which are T-shaped plugs.

In the above structure, the T-shaped plug is a rubber plug, which can be disassembled as required.

In this embodiment, the side of the main handle 11 facing away from the front end of the needle tube 10 is provided with a main stopper 12, and the side of the auxiliary handle 40 facing the front end of the first needle core 20 or the second needle core 30 is provided with a secondary stopper 44 When the first needle core 20 or the second needle core 30 is inserted into the needle tube 10, the side of the main block 12 facing away from the front end of the needle tube 10 is against the auxiliary handle 40, and the auxiliary block 44 is facing the first needle core 20 or the second needle core 20 or the second needle core 30. One side of the front end of the needle core 30 is against the main stopper 12 to control the axial position when the first needle core 20 and the second needle core 30 are inserted into the needle tube 10, and the side of the main stopper 12 is against the side of the secondary stopper 44 to prevent drilling. The clock-in needle tube 10 and the first needle core 20 or the second needle core 30 are relatively rotated.

In this embodiment, the side of the main handle 12 facing the auxiliary handle 40 and the side of the auxiliary handle 40 facing the main handle 12 are both provided with magnetic pieces 45 that attract each other.

In the above structure, the main handle 12 and the auxiliary handle 40 are attracted by the magnetic piece 45 to avoid loosening, and the magnetic piece 45 is a magnet.

In this embodiment, the side of the main handle 12 facing away from the front end of the needle tube 10 is provided with a tapered hole 13 coaxially arranged with the needle tube 10, and on the auxiliary handle 40 of the first needle core 20 and the second needle core 30, the The side facing the main handle 12 is coaxial with the axis of the first needle core 20 or the second needle core 30 , and is used to fit the taper hole 13 when the main handle 12 and the auxiliary handle 40 are engaged with each other.

In the above structure, when the first needle core 20 or the second needle core 30 is inserted into the needle tube 10, the cooperation between the vertebral platform 46 and the tapered hole 13 can prevent blood or bone marrow fluid from entering the gap between the inner wall of the needle tube 10 and the outer wall of the first needle core 20. Or the gap between the inner wall of the needle tube 10 and the outer wall of the second needle core 30 seeps out.

In this embodiment, the front section of the second needle core 30 is provided with a material taking notch 33 divided 180 degrees along its circumferential direction.

In the above structure, the compression of the bone marrow when the second needle core 30 is inserted can be reduced.

In this embodiment, the separation cone 32 is located at the middle position in the circumferential direction of the inner wall of the front end of the second needle core 30 where no material extraction groove 33 is provided.

In the above structure, the shielding ability of the separating vertebra 32 to the bone marrow can be improved when the second needle core 30 is pulled out.

Beneficial effects of the present invention: when piercing, use the connecting channel 23 on the triangular vertebral head 21 to accommodate the bone powder generated during drilling and discharge it into the first channel 22, improve chip removal efficiency, reduce drilling resistance, It makes drilling easier, reduces the accumulation of bone powder on the bone surface, is beneficial to postoperative recovery, and prevents bone powder from entering the subcutaneous soft tissue or synovial layer. At the same time, in order to ensure the reliability of anesthesia and avoid pain due to inadequate anesthesia during puncture, you can Dip the anesthetic on the triangular vertebral head 21 before drilling, so that part of the anesthetic is temporarily stored in the connecting channel 23 and the first channel 22, or it can be supplied directly through the first channel 22 when the anesthetic fails or the anesthesia is not in place. Anesthesia can be applied directly for re-anesthesia; the separation vertebra 32 can be rotated by rotating the second needle core 30 when taking out the bone marrow, so as to impel the first circumferential edge line 324 or the second circumferential edge line 325 to cut the bone located in the second needle core 30 reduce or completely cut off the connection area between the bone marrow in the second needle core 30 and the bone marrow inside the bone, and when the second needle core 30 is pulled out, it can also block the end surface of the bone marrow in the second needle core 30, which is convenient When the second needle core 30 is pulled out, the bone marrow is taken out, thereby improving the success rate of extraction, and the axial edge line 326 can be cut along the axial direction of the second needle core 30 when the second needle core 30 is inserted and located in the bone marrow, reducing resistance .

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, some improvements and modifications can also be made. Improvements and variations should also be regarded as the protection scope of the present invention.

Claims (10)

1. The utility model provides a needle of drawing materials of wicresoft's marrow biopsy, includes needle tubing, first nook closing member and second nook closing member, the needle tubing afterbody is equipped with the main handle, first nook closing member, second nook closing member afterbody all are equipped with vice handle, its characterized in that: the front end of the first needle core is provided with a triangular pyramid head, the center of the first needle core is provided with a first channel which is opened to the end surface of the tail part of the first needle core, and three conical surfaces of the triangular pyramid head are provided with connecting channels communicated with the first channel; the center of the second stylet is provided with a second channel which is communicated with the second stylet, the inner cylindrical wall at the end part of the front end of the second stylet is provided with a separation cone, the cone tip of the separation cone faces the center of the second stylet, the separation cone is in a triangular cone shape, three triangular surfaces of the separation cone are respectively a first surface, a second surface and a third surface, the first surface and the second surface are mutually butted to form a first circumferential edge line, the first surface and the third surface are mutually butted to form a second circumferential edge line, the rotation planes of the first circumferential edge line and the second circumferential edge line are mutually superposed when the center of the second stylet is taken as the circle center, the second surface and the third surface are mutually butted to form an axial edge line, and the axial edge line is positioned at one side of the first surface facing the front end of the second stylet.

2. The minimally invasive bone marrow biopsy sampling needle according to claim 1, characterized in that: and a first constant pressure port communicated with the first channel is arranged on the auxiliary handle of the first needle core, and a first cutoff device is arranged on the first constant pressure port.

3. The minimally invasive bone marrow biopsy sampling needle according to claim 2, characterized in that: the first flow interception device is blocked at the first constant pressure port and is a T-shaped plug.

4. The minimally invasive bone marrow biopsy sampling needle according to claim 1, characterized in that: and a second constant pressure port communicated with the second channel is arranged on the auxiliary handle of the second needle core, and a second cut-off device is arranged on the second constant pressure port.

5. The minimally invasive bone marrow biopsy sampling needle according to claim 4, characterized in that: the second cut-off equipment is blocked at the second constant pressure port and is a T-shaped plug.

6. The minimally invasive bone marrow biopsy sampling needle according to claim 1, characterized in that: one side of the main handle, which is back to the front end of the needle tube, is provided with a main stop block, and one side of the auxiliary handle, which is towards the front end of the first needle core or the second needle core, is provided with an auxiliary stop block; when the first needle core or the second needle core is inserted into the needle tube, one surface of the main stop block back to the front end of the needle tube is abutted against the auxiliary handle, one surface of the auxiliary stop block facing to the front end of the first needle core or the second needle core is abutted against the main stop block so as to control the axial positions of the first needle core and the second needle core when the first needle core and the second needle core are inserted into the needle tube, and meanwhile, the side surface of the main stop block is abutted against the side surface of the auxiliary stop block so as to prevent the needle tube and the first needle core or the second needle core from rotating relatively when the needle tube is drilled.

7. The minimally invasive bone marrow biopsy sampling needle according to claim 1 or 6, characterized in that: and one surface of the main handle facing the auxiliary handle and one surface of the auxiliary handle facing the main handle are respectively provided with magnetic parts which are mutually attracted.

8. The minimally invasive bone marrow biopsy sampling needle according to claim 1, characterized in that: the one side of main handle back of the body needle tubing front end is equipped with the taper hole with the coaxial setting of needle tubing, on the vice handle of first nook closing member and second nook closing member, its one side towards the main handle all is equipped with coaxial with first nook closing member or second nook closing member axis, be used for the vertebra platform with the taper hole adaptation when main handle and the mutual block of vice handle.

9. The minimally invasive bone marrow biopsy sampling needle according to claim 1, characterized in that: and a material taking notch which is split by 180 degrees along the circumferential direction of the second stylet is arranged at the front section of the second stylet.

10. The minimally invasive bone marrow biopsy sampling needle according to claim 9, characterized in that: the separating cone is positioned at the central position of the front end of the second stylet in the circumferential direction of the inner wall where the material taking groove is not arranged.

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