CN111358505A - Minimally invasive bone marrow biopsy sampling needle - Google Patents

Abstract

The invention provides a minimally invasive bone marrow biopsy needle, comprising a needle tube, a first needle core and a second needle core. 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 opened to the end face of its tail, and the three conical surfaces of the triangular pyramid head are provided with the first channel. The center of the second needle core is provided with a second channel that is opened to the other side, the inner cylindrical wall at the end of the front end of the second needle core is provided with a separation cone, and the cone tip of the separation cone faces the first In the center of the second needle core, the separating cone is a triangular pyramid. The invention has the advantages that the bone marrow smear examination and the bone marrow biopsy can be performed simultaneously in one puncture, the use is reliable, the pain of the patient can be effectively reduced, and the success rate of bone marrow extraction is high.

Description

A minimally invasive bone marrow biopsy needle

technical field

The invention relates to the field of medical equipment, belongs to the medical technology A61M, and particularly 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. During the operation, the skin surface is first disinfected and anesthetized. First, the needle body used for drilling is inserted into the needle tube to expose the needle, and then the needle body and the needle tube are inserted into the skin until the surface of the bone, and the needle body and the needle tube are rotated synchronously. The needle body drills through the surface of the bone and guides the front end of the needle tube into the bone. After drilling, the needle body is pulled out to extract the bone marrow fluid or the bone marrow needle tube is inserted, and the needle tube is further rotated to extract the bone marrow, and then the bone marrow needle tube is pulled out to take out the bone marrow...; During this period, the needle will squeeze the bone powder and discharge it from the back to the surface of the bone, which is easy to cause the bone powder to enter the subcutaneous soft tissue or synovial layer, and it is easy to produce pimples after surgery. It is easy to directly pull out the bone marrow needle tube because the bone marrow column that is cut out and the bone marrow inside the bone are still in a state of adhesion and cannot be taken out.

SUMMARY OF THE INVENTION

Based on the above problems, the purpose of the present invention is to provide a minimally invasive bone marrow biopsy needle that can simultaneously 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 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 pyramid head, the center of the first needle core is provided with a first channel opened to the end face of the tail, and the three pyramid heads of the first needle core are provided. The conical surface is provided with a connecting channel which communicates with the first channel; the center of the second needle core is provided with a second channel which is opened in the opposite direction, and the inner cylindrical wall at the end of the front end of the second needle core is provided with a separation channel. vertebra, the tip of the split vertebra faces the center of the second needle core, the split vertebra is a triangular pyramid, and its three triangular faces are the first face, the second face and the third face respectively, the first face and the third face The two sides butt against each other form a first circumferential edge line, the first and third surfaces butt against each other to form a second circumferential edge line, the first circumferential edge line and the second circumferential edge line are in the second circumferential direction When the center of the needle core is the center of the circle, the rotation planes coincide with each other, the second surface and the third surface are butted with 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 pyramid head is used to accommodate the bone powder generated during drilling and discharge into the first channel, so as to improve chip removal efficiency, reduce drilling resistance, and make drilling easier. , reduce the accumulation of bone powder on the surface of the bone, which is beneficial to postoperative recovery, avoids bone powder entering the subcutaneous soft tissue or synovial layer, and at the same time, in order to ensure the reliability of anesthesia and avoid pain due to insufficient anesthesia during the puncture process. Dip the anesthetic on the head of the triangular vertebra, so that part of the anesthetic is temporarily stored in the connecting channel and the first channel, or when the anesthetic fails or the anesthesia is not in place, the anesthetic is directly supplied through the first channel, and the anesthesia can be directly performed again; Separating the vertebra can cut the bone marrow in the second needle core by rotating the second needle core when the bone marrow is taken out, prompting the first circumferential edge line or the second circumferential edge line to cut the bone marrow located in the second needle core, reducing or completely severing the bone marrow located in the second needle core. The connection area with the bone marrow inside the bone can also play the role of shielding the end face of the bone marrow in the second needle core when the second needle core is pulled out, so that the bone marrow can be brought out when the second needle core is pulled out, thereby improving the success rate of extraction. , the axial edge line can cut the bone marrow along the axial direction of the second needle core when the second needle core is inserted to reduce resistance.

According to the present invention, the auxiliary handle of the first needle core is provided with a first constant pressure port which communicates 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 anesthesia into the first channel when the anesthesia is not in place, and at the same time, when the first needle core and the needle tube are pulled out after the operation is completed, it can be blocked by the first shutoff device, which is convenient for passing the negative pressure. The bone powder tissue in the connecting channel and the first channel is squeezed out, avoiding the possibility of taking out the bone powder on the bone surface to the muscle tissue and the synovial layer when the traditional needle and needle tube are pulled out.

According to the present invention, the secondary handle of the second needle core is provided with a second constant pressure port communicating with the second channel, and a second shutoff device is provided on the second constant pressure port.

In the above structure, the second constant pressure port can generate negative pressure by blocking the second shut-off device when the bone marrow is taken out, further improving the success rate of extraction; at the same time, when the second needle core is inserted into the needle tube, the second shut-off device is removed to balance the pressure difference. To avoid the piston effect, it is also convenient for the bone marrow to be poked out from the second needle core after taking out the bone marrow.

The present invention further provides that the first shut-off device and the second shut-off device are respectively blocked at 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 and assembled as required.

In the present invention, a main stop is provided on the side of the main handle facing away from the front end of the needle tube, and a secondary block is provided on the side of the auxiliary handle facing the front end of the first needle core or the second needle core; the first needle When the core or the second needle core is inserted into the needle tube, the side of the main block facing away from the front end of the needle tube abuts against the auxiliary handle, and the side of the auxiliary block facing the front end of the first needle core or the second needle core abuts against the main stopper to control the first needle core. The axial position of the first needle core and the second needle core when they are inserted into the needle tube, and at the same time, the side of the main stop and the side of the auxiliary stop are abutted to prevent the needle tube and the first needle core or the second needle core from rotating relative to each other when they are drilled.

According to the present invention, the side of the main handle facing the auxiliary handle and the side of the auxiliary handle facing the main handle are 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 element, which can avoid loosening.

The present invention further provides 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 the sides of the auxiliary handles of the first needle core and the second needle core facing the main handle are both A vertebral abutment is provided which is coaxial with the axis of the first needle core or the second needle core and is used for fitting with 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, the vertebral disc and the cone hole can be matched to prevent blood or bone marrow fluid from passing through the gap between the inner wall of the needle tube and the outer wall of the first needle core or the inner wall of the needle tube and the second needle. The gaps between the outer walls of the core ooze.

According to the present invention, the front section of the second needle core is provided with a reclaiming notch which is divided by 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.

According to the present invention, the separation cone is located at a central position in the circumferential direction of the inner wall of the front end of the second needle core where the reclaiming groove is not provided.

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

The beneficial effects of the present invention are as follows: when piercing, the connecting channel on the triangular pyramid head is used to accommodate the bone powder generated during drilling and discharge into the first channel, so as to improve chip removal efficiency, reduce drilling resistance, and make drilling It is 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. Before dipping anesthesia on the triangular vertebral head, part of the anesthetic is temporarily stored in the connecting channel and the first channel, or when the anesthetic fails or the anesthesia is not in place, the anesthetic is directly supplied through the first channel, which can be directly carried out again. Anesthesia; Separating the vertebra can cut the bone marrow located in the second core by rotating the second core when removing the bone marrow, prompting the first circumferential edge line or the second circumferential edge line to cut the bone marrow located in the second core, reducing or completely severing the second core. The connection area between the inner marrow and the inner marrow of the bone can also play the role of shielding the end face of the marrow located in the second needle core when the second needle core is pulled out, so that the marrow can be brought out when the second needle core is pulled out, thereby improving the removal rate. For the success rate, the axial blade line can cut the bone marrow along the axial direction of the second needle core when the second needle core is inserted, reducing the resistance.

Description of drawings

FIG. 1 is a schematic structural diagram 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 partial structural schematic diagram 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 the full cross-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 cross-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 the full cross-sectional structure of the second needle core of the present invention.

Figure 11 is a schematic diagram of the structure of the split 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 an enlarged schematic structural diagram of the B part of FIG. 4 of the present invention.

FIG. 14 is an enlarged schematic structural diagram of the C part of FIG. 8 of the present invention.

The meaning of the symbols in the figure: 10-needle tube; 11-main handle; 12-main stopper; 13-cone hole; 20-first needle core; 21-triangular pyramid head; 22-first channel; 23-connection channel; 30-second needle core; 31-second channel; 32-separation cone; 321-first face; 322-second face; 323-third face; 324-first circumferential edge line; 325-second circumference Toward edge line; 326 - axial edge line; 33 - reclaiming slot; 40 - auxiliary handle; 41 - first constant pressure port; 42 - first shutoff device; 43 - second constant pressure port; 44 - auxiliary block block; 45 - magnetic piece; 46 - vertebral table.

Detailed ways

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

Referring to FIGS. 1 to 14 , a minimally invasive bone marrow biopsy needle as shown in FIGS. 1 to 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. A secondary handle 40 is provided at the tail of the first needle core 20 and the second needle core 30. The front end of the first needle core 20 is provided with a triangular pyramid head 21, and the center of the first needle core 20 is provided with a The first channel 22 on the end face of its tail, the three conical surfaces of the triangular pyramid head 21 are provided with connecting channels 23 communicating with the first channel 22; the center of the second needle core 30 is provided with a pair of open In the second channel 31, the inner cylindrical wall at the front end of the second needle core 30 is provided with a separation cone 32, the cone tip of the separation cone 32 faces the center of the second needle core 30, and the separation cone 32 is a triangular pyramid The three triangular faces are the first face 321, the second face 322 and the third face 323 respectively. The surface 321 and the third surface 323 are butted against each other to form a second circumferential edge line 325. The first circumferential edge line 324 and the second circumferential edge line 325 have their rotation planes with each other when the center of the second needle core 30 is the center of the circle. Coincidentally, the edges of the second surface 322 and the third surface 323 are butted to 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 pyramid head 21 is used to accommodate the bone powder generated during drilling and discharge into the first channel 22, so as to improve the chip removal efficiency, reduce the drilling resistance, and make the drilling It is easier to enter and reduce the accumulation of bone powder on the surface of the bone, which is beneficial to postoperative recovery and avoids bone powder 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; the separation vertebra 32 can cut the bone marrow located in the second needle core 30 by rotating the second needle core 30 when the bone marrow is taken out, so as to promote the first circumferential edge line 324 or the second circumferential edge line 325 , reduce or completely cut off the connection area between the bone marrow located 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 the role of blocking the end face of the bone marrow located in the second needle core 30, which is convenient for pulling out When the second needle core 30 is inserted, the bone marrow can be taken out, thereby improving the success rate of extraction, and the axial edge line 326 can cut the bone marrow along the axial direction of the second needle core 30 when the second needle core 30 is inserted to reduce 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 a first shutoff device 42 is provided on the first constant pressure port 41 .

In the above structure, the first constant pressure port 41 can inject anesthesia into the first channel 22 when the anesthesia is not in place, and can be sealed by the first shut-off device 42 when the first needle core 20 and the needle tube 10 are pulled out after the operation is completed. It is convenient to take out the bone powder tissue in the connecting channel 23 and the first channel 22 by negative pressure, and avoids the possibility of taking out the bone powder from the bone surface to the muscle tissue and the 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 that communicates with the second channel 31 , and the second constant pressure port 43 is provided with a second shutoff device (with the The first shut-off device 42 is identical and therefore not shown in the figure).

In the above structure, the second constant pressure port 43 can generate negative pressure by blocking the second shut-off device when the bone marrow is taken out, thereby further improving the success rate of extraction; at the same time, when the second needle core 30 is inserted into the needle tube 10, the second shut-off device is removed. Balance the pressure difference to avoid the piston effect, and also facilitate the extraction 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 respectively blocked at the first constant pressure port 41 or the second constant pressure port 43 , which are T-shaped plugs.

In the above structure, the T-shaped plug is a rubber plug, which can be disassembled and assembled 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 stopper 12 facing away from the front end of the needle tube 10 abuts against the auxiliary handle 40, while the auxiliary stopper 44 faces the first needle core 20 or the second needle core 40. One side of the front end of the needle core 30 is in contact with the main stopper 12 to control the axial position of the first needle core 20 and the second needle core 30 when they are inserted into the needle tube 10. The needle tube 10 and the first needle core 20 or the second needle core 30 rotate relative to each other.

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

In the above structure, the main handle 12 and the auxiliary handle 40 attract each other through the magnetic member 45, which can avoid loosening, and the magnetic member 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 . The side facing the main handle 12 is provided with a cone 46 which 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 vertebral platform 46 can cooperate with the tapered hole 13 to prevent blood or bone marrow fluid from passing through 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 reclaiming slot 33 which is divided by 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 a central position in the circumferential direction of the inner wall where the front end of the second needle core 30 is not provided with the reclaiming groove 33 .

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

The beneficial effects of the present invention are as follows: when piercing, the connecting channel 23 on the triangular pyramid head 21 is used to accommodate the bone powder generated during drilling and discharge it into the first channel 22, so as to improve the chip removal efficiency and reduce the drilling resistance. It makes drilling easier, reduces the accumulation of bone powder on the bone surface, is conducive to postoperative recovery, and prevents bone powder from entering the subcutaneous soft tissue or synovial layer. Dip the anesthetic on the triangular pyramid head 21 before drilling, so that part of the anesthetic is temporarily stored in the connecting channel 23 and the first channel 22, or directly through the first channel 22 when the anesthetic fails or the anesthesia is not in place. Anesthesia can be applied directly, and re-anesthesia can be performed directly; the separation vertebra 32 can be cut and located in the second needle core 30 by rotating the second needle core 30 when the bone marrow is taken out, so as to prompt the first circumferential edge line 324 or the second circumferential edge line 325 to cut It reduces or completely cuts off the connection area between the bone marrow located in the second needle core 30 and the bone marrow inside the bone. 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 cut the bone marrow along the axial direction of the second needle core 30 when the second needle core 30 is inserted, reducing resistance .

The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, some improvements and modifications can be made without departing from the technical principles of the present invention. Improvements and modifications should also be regarded as the protection scope of the present invention.

Claims (9)

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 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.

4. The minimally invasive bone marrow biopsy sampling needle according to claim 2 or 3, characterized in that: the first cut-off device and the second cut-off device are respectively blocked at the first constant pressure port or the second constant pressure port and are both T-shaped plugs.

5. The minimally invasive bone marrow biopsy sampling needle according to claim 1, characterized in that: a main stop block is arranged on one side of the main handle back to the front end of the needle tube, and an auxiliary stop block is arranged on one side of the auxiliary handle facing the front end of the first needle core or the second needle core; 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.

6. The minimally invasive bone marrow biopsy sampling needle according to claim 1 or 5, 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.

7. The minimally invasive bone marrow biopsy sampling needle according to claim 1, characterized in that: the one side of main handle back to 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.

8. 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.

9. The minimally invasive bone marrow biopsy sampling needle according to claim 8, 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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