CN218979129U - Bone marrow puncture needle - Google Patents

Abstract

The utility model provides a bone marrow puncture needle, which comprises a needle core, a needle tube, a needle core seat and a needle tube seat, wherein a through hole is formed in the needle tube seat, the needle tube is inserted into the through hole and connected with the needle tube seat, the bottom of the needle tube seat is detachably connected with the needle core seat, a needle core mounting groove coaxial with the through hole is formed in the needle core seat, one end of the needle core is inserted into the needle core mounting groove, the other end of the needle core penetrates out through the needle tube in the through hole, positioning rings for positioning the needle tube or the needle core are respectively arranged on the inner wall of the through hole or the needle core mounting groove, and a glue injecting through groove communicated with the through hole or the needle core mounting groove is formed in the positioning rings. The utility model has good installation stability and good anti-falling performance.

Description

Bone marrow puncture needle

Technical Field

The utility model relates to the technical field of medical appliances, in particular to a bone marrow puncture needle.

Background

The bone marrow puncture needle is applied to the bone marrow cavity transfusion operation, namely, the bone marrow puncture needle is drilled into the bone marrow cavity of long bones or the bone marrow cavity of breastbone through the bone drill, the needle core part of the bone marrow puncture needle is detached and taken out, the needle tube part is left at the puncture part and is connected with the transfusion device, the venous transfusion channel is quickly established, and the rescuing time can be effectively shortened.

When the existing bone marrow puncture needle is produced and processed, the needle core and the needle tube are required to be inserted into the installation grooves of the needle core seat and the needle tube seat, the needle core, the needle tube, the needle core seat and the needle tube seat are glued together by injecting UV glue into the installation grooves, and then the needle tube seat is detachably arranged on the needle core seat, so that the needle tube is sleeved on the needle core to complete the assembly of the bone marrow puncture needle; because the gap for injecting glue is needed between the needle core/needle tube and the installation groove of the needle core seat/needle tube seat, the stability of the needle core/needle tube is poor, and the needle core/needle tube is easy to deviate or shake in the gap during injecting glue, so that the final needle core/needle tube is eccentric on the needle core seat/needle tube seat, and the needle core/needle tube seat is driven to rotate by a bone drill during use, the needle core/needle tube can shake due to the eccentric, and further the positioning deviation even the needle core/needle tube is separated due to the eccentric shaking; and because the needle core/needle tube is connected with the needle core seat/needle tube seat only through simple adhesive, the adhesive force is limited, and when the torque force applied by the bone drill to the bone marrow puncture needle exceeds the adhesive force, the bottom of the needle core/needle tube easily falls off, so that the bone marrow puncture needle is left in a human body, and the transfusion operation in the bone marrow cavity is failed.

Disclosure of Invention

In order to solve the defects in the prior art, the utility model provides the bone marrow puncture needle with good stability and anti-drop property.

The technical scheme of the utility model is as follows: the utility model provides a marrow pjncture needle, includes needle core, needle tubing, needle core seat and needle tube seat, is equipped with the through-hole on the needle tube seat, and the needle tubing inserts in the through-hole and is connected with the needle tubing seat, and needle core seat bottom is equipped with the needle core mounting groove with the through-hole coaxial line on the needle core seat, and the one end of needle core is inserted in the needle core mounting groove, and the needle tube inside of the other end through the through-hole of needle core wears out its characterized in that: the inner wall of the through hole or the needle core mounting groove is respectively provided with a positioning ring for positioning the needle tube or the needle core, and the positioning ring is provided with a glue injection through groove communicated with the through hole or the needle core mounting groove. The needle tube or the needle core is positioned through the positioning ring, the stability of the needle tube/the needle core during installation is good, the needle tube/the needle core is guaranteed to be coaxial with the through hole/the needle core installation groove all the time, the needle tube/the needle core is stable and does not deviate during use, after the viscose is formed, the colloid from top to bottom is connected through the glue injection through groove and forms limit fit with the annular end face of the positioning ring, the needle tube and the needle core are effectively prevented from moving up and down or left and right, and the anti-drop performance of the bone marrow puncture needle is improved.

The positioning rings on the through holes are needle tube positioning rings, at least two groups of needle tube positioning rings are respectively axially arranged on the inner walls of the through holes in parallel, at least two glue injection through grooves on each needle tube positioning ring are arranged, and the glue injection through grooves on the needle tube positioning rings axially arranged between the inner walls of the through holes in parallel are distributed in a staggered mode.

The positioning rings on the needle core mounting grooves are at least two groups of needle core positioning rings, the needle core positioning rings are respectively axially arranged on the inner walls of the needle core mounting grooves in parallel, the number of glue injection through grooves on each needle core positioning ring is at least two, and the glue injection through grooves on the needle core positioning rings which are axially arranged between the inner walls of the needle core mounting grooves in parallel are distributed in a staggered mode. The design of multiunit holding ring and crisscross injecting glue logical groove that distributes further improves the area of contact of colloid and holding ring terminal surface after the shaping, and then increases the fastness of sticky department, has improved the anticreep nature of bone marrow pjncture needle.

The locating rings are distributed on the inner wall of the through hole or the needle core mounting groove in a threaded mode. Through the screw thread form distribution design of holding ring, when bone drill applys torsion to bone marrow pjncture needle, the area of contact between colloid and the holding ring terminal surface on its torsion direction increases, and then increases the fastness of gluing department, has improved the anticreep nature of bone marrow pjncture needle.

The through hole comprises a needle tube installation part and a needle core guide part, the needle tube positioning ring is arranged on the inner wall of the needle tube installation part of the through hole, the cross section of the needle core guide part of the through hole is funnel-shaped, the small opening end of the needle core guide part is communicated with the needle tube installation part, and the inner diameter of the small opening end of the needle core guide part is smaller than the inner diameter of the needle tube positioning ring. Through the design funnel-shaped needle core guiding part, the stability and the transition when the needle core penetrates into the needle tube seat are ensured, the small opening inner diameter of the needle core guiding part is smaller than the inner diameter of the needle tube positioning ring, and the small opening end of the needle core guiding part can be used as a limiting part at the bottom of the needle tube to prevent the bottom of the needle tube from penetrating out from the bottom of the needle tube seat due to overlarge force application.

The needle tube seat comprises a needle tube seat body, and is characterized in that an annular groove is formed in the top end of the needle tube seat, an elastic foam pad is arranged on the surface of the needle tube seat outside the annular groove, and the elastic foam pad is adhered to the surface of the needle tube seat. The surface of the tube seat contacts the skin through the elastic foam pad when drilling the bone, thereby better protecting the skin around the needle tube.

The needle is characterized in that a pyramid-shaped needle point is arranged at the top of the needle core, knurling or side cutting surfaces are arranged at the bottom of the needle core, needle tube tips with multi-surface inclined cutting edges are arranged at the top of the needle tube, and the inclined cutting surfaces of the needle tube tips and the conical surface of the needle point form coplanar assembly. The shape of the needle point is in a pyramid structure, the edge of the needle point is used for assisting in cutting when drilling bones, the puncture needle can be promoted to puncture bones rapidly, the bottom of the needle core is provided with knurls or side cutting surfaces, so that the colloid after glue injection is in plane contact with the side cutting surfaces at the bottom of the needle core, when the bone drill applies torsion to the bone marrow puncture needle, the torsion direction of the bone drill is blocked by the knurls or the side cutting surfaces at the bottom of the needle core, the firmness of gluing positions is further improved, and the anti-drop performance of the bone marrow puncture needle is improved.

The bottom of the needle core seat is provided with an inner hexagonal groove or an outer hexagonal lug which is used for being matched with a bone drill, and a neodymium magnetic sheet is arranged in the inner hexagonal groove or on the outer hexagonal lug. The neodymium magnetic sheet is designed to facilitate the bone marrow puncture needle to be adsorbed on the bone drill, and is convenient for operation during operation.

The beneficial effects of the utility model are as follows: the positioning ring is arranged in the through hole or the needle core mounting groove to pre-position the installation of the needle tube or the needle core, so that the stability of the needle tube or the needle core during installation is ensured, and the needle tube/the needle core is always coaxial with the through hole/the needle core mounting groove, and is stable and does not deviate during use; simultaneously through the injecting glue logical groove of design on the holding ring, conveniently carry out injecting glue through injecting glue logical groove to the clearance between needle tubing and needle core and the mounting groove, after the colloid shaping, colloid about the holding ring links to each other and forms spacing cooperation with the annular terminal surface of location through injecting glue logical groove, when bone drill applys torsion to the bone marrow pjncture needle, can effectually prevent needle tubing and needle core to take place relative displacement, improves stability after the bonding, reinforcing bone marrow pjncture needle's anticreep nature.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of the structure of the utility model with the needle protective sheath removed;

FIG. 3 is a cross-sectional view of a needle hub of an embodiment;

FIG. 4 is a cross-sectional view of a needle mount of an embodiment;

FIG. 5 is a schematic view of the structure of a needle cannula of the present utility model;

FIG. 6 is a schematic view of the structure of the inventive needle;

FIG. 7 is a cross-sectional view of a two-needle hub of an embodiment;

FIG. 8 is a cross-sectional view of a second needle mount of an embodiment;

fig. 9 is a schematic view of a needle core print seat with an outer hexagonal bump at the bottom.

Reference numerals: 1. a needle holder; 11. a through hole; 12. a needle tube positioning ring; 13. injecting glue into the through groove; 14; a needle core guiding part; 15. an annular groove; 16. luer male; 17. reinforcing ribs; 2. a needle core seat; 21. a needle core mounting groove; 22. a needle core positioning ring; 23. an inner hexagonal groove; 24. luer mother head; 25. an anti-slip vertical bar; 26. an outer hexagonal bump; 3. a needle body protecting sleeve; 4. a needle tube; 41. needle tube tip; 5, a step of; a needle core; 51. a needle tip; 52. side cutting; 7. an elastic foam pad; 8. neodymium magnetic sheet.

Detailed Description

In order to make the technical solution of the present utility model better understood by those skilled in the art, the following description is made in detail with reference to the accompanying drawings, and other embodiments obtained by those skilled in the art without making any inventive effort are all within the scope of the present utility model.

As shown in fig. 2 to 4, a first embodiment provides a bone marrow puncture needle, which comprises a needle core 5, a needle tube 4, a needle core seat 2 and a needle tube seat 1, wherein a through hole 11 is arranged at the top of the needle tube seat 1, the bottom of the needle tube 4 is inserted into the through hole 11 and is communicated with the bottom of the needle tube seat 1, the bottom of the needle tube seat 1 is detachably connected with the needle core seat 2, a needle core mounting groove 21 coaxial with the through hole 11 is arranged on the needle core seat 2, one end of the needle core 5 is inserted into the needle core mounting groove 21, the other end of the needle core 5 penetrates out through the needle tube 4 in the through hole 11, a positioning ring for positioning the needle tube 4 or the needle core 5 is respectively arranged on the inner wall of the through hole 11 or the needle core mounting groove 21, and a glue injecting through groove 13 communicated with the through hole 11 or the needle core mounting groove 21 is arranged on the positioning ring; the technician can optionally install a positioning ring on one of the needle tube seat 1 and the needle core seat 2 for positioning according to the requirement, and the other one is corrected by the matching of the needle tube and the needle core after assembling; the positioning ring is arranged in the through hole 11 or the needle core mounting groove 21, so that the needle tube 4 or the needle core 5 is mounted in advance, the stability of the needle tube 4 and the needle core 5 during mounting is ensured, and the needle tube/the needle core are always coaxial with the through hole/the needle core mounting groove, and the needle tube/the needle core is stable and does not deviate during use; preferably, positioning rings are arranged on the inner walls of the through hole 11 and the needle core mounting groove 21, namely a needle tube positioning ring 12 and a needle core positioning ring 22 respectively, and the needle tube 4 and the needle core 5 are positioned through the positioning rings, so that the needle tube 4 and the needle core 5 are always on the same axis during assembly, and further the assembly consistency and the assembly coordination are better; simultaneously, through the design injecting glue through groove 13, the gap between needle tube 4 and needle core 5 and the mounting groove is conveniently injected with glue, after the colloid is formed, the colloid on the upper and lower parts of the positioning ring is connected through the injecting glue through groove 13 and forms limit fit with the annular end face of the positioning ring, the needle tube 4 and the needle core 5 are effectively prevented from moving up and down or left and right, and the anti-drop property of the bone marrow puncture needle is improved.

A luer female head 24 is arranged above the needle core seat 2, a luer male head 16 is arranged below the needle tube seat 1, and the needle core seat 2 is detachably mounted on the needle tube seat 1 through the cooperation between the luer female head 24 and the luer male head 16; the connection mode ensures the stability after the needle tube seat 1 and the needle core seat 2 are installed, and the convenience of disassembly and separation, and meanwhile, the luer male head 16 below the needle tube seat 1 is internally provided with a liquid injection port and the interface of the infusion device has suitability. The structure and connection of the luer male head 16 and the luer female head 24 are conventional, and will not be described in detail.

The through hole 11 comprises a needle tube mounting part and a needle core guiding part 14, the needle tube positioning ring 12 is arranged on the inner wall of the needle tube mounting part of the through hole 11, the cross section of the needle core guiding part 14 of the through hole is funnel-shaped, the small opening end of the needle core guiding part 14 is communicated with the needle tube mounting part, and the inner diameter of the small opening end of the needle core guiding part 14 is smaller than the inner diameter of the needle tube positioning ring 12; through designing funnel-shaped needle core guide part 14, the stability and the transition when the needle core 5 penetrates into the needle tube seat 1 are ensured, the small opening inner diameter of the needle core guide part 14 is smaller than the inner diameter of the needle tube positioning ring 12, and the small opening end of the needle core guide part 14 can be used as a limiting part at the bottom of the needle tube 4 to prevent the needle tube 4 in the through hole 11 from penetrating out from the bottom of the needle tube seat 1 due to overlarge force application.

The needle tube positioning rings 12 and the needle core positioning rings 22 are at least two groups, are vertically arranged on the inner walls of the through holes 11 and the needle core mounting grooves 21 in parallel respectively, the number of the glue injection through grooves 13 on each needle tube positioning ring 12 and each needle core positioning ring 22 is at least two, and the glue injection through grooves 13 on adjacent needle tube positioning rings 12 or needle core positioning rings 22 are distributed in a staggered manner; the design of the plurality of groups of positioning rings and the staggered glue injection through grooves 13 further improves the contact area between the colloid and the end face of the positioning rings after molding, further increases the firmness of the gluing position and improves the anti-drop performance of the bone marrow puncture needle.

As shown in fig. 1 and 2, an annular groove 15 is formed in the top end of the needle tube seat 1, an elastic foam pad is arranged on the surface of the needle tube seat 1 outside the annular groove 15, and the elastic foam pad is adhered to the surface of the needle tube seat; the surface of the tube seat contacts the skin through the elastic foam pad when drilling the bone, thereby better protecting the skin around the needle tube. The needle tube seat 1 is provided with a needle body protecting sleeve 3, the needle body protecting sleeve 3 is sleeved outside the needle tube 4, and the lower end of the needle body protecting sleeve 3 is clamped in an annular groove 15 arranged at the top end of the needle tube seat 1; the needle body protecting sleeve 3 is clamped in the annular groove 15, so that the needle body protecting sleeve is convenient to insert and pull out and the puncture needle is protected.

As shown in fig. 5 and 6, the top of the needle core 5 is provided with a pyramid-shaped needle tip 51, the bottom of the needle core 5 is provided with a knurled or side-cut surface 52, the top of the needle tube 4 is provided with a needle tube tip 41 with a multi-surface inclined cutting edge, and the inclined cutting edge surface of the needle tube tip 41 and the conical surface of the needle tip 51 form a coplanar assembly; preferably, the needle tip 51 is triangular pyramid, the needle tube tip 41 is three-sided inclined cutting edge, and the number of the side cutting surfaces 52 at the bottom of the needle core 5 is two; the needle tip 51 is in a pyramid structure, and the edge of the needle tip is used for auxiliary cutting during bone drilling, so that a puncture needle can be promoted to puncture bones rapidly; the side cutting surface 51 is arranged at the bottom of the needle core 5, so that the glue body is in plane contact with the side cutting surface 51 at the bottom of the needle core after glue injection, and when the bone drill applies torsion to the bone marrow puncture needle, the torsion direction of the bone marrow puncture needle is blocked by the side cutting surface 51 at the bottom of the needle core, so that the firmness of the glued part is improved, and the anti-drop performance of the bone marrow puncture needle is improved.

As shown in fig. 4 and 9, the bottom of the needle core seat 2 is provided with an inner hexagonal groove 23 or an outer hexagonal convex block 26 for adapting to a bone drill, and a neodymium magnetic sheet 8 is arranged in the inner hexagonal groove 23 or on the outer hexagonal convex block 26; the neodymium magnetic sheet 8 is designed to facilitate the bone marrow puncture needle to be adsorbed on the bone drill and the operation during the operation.

A plurality of anti-slip vertical bars 25 are uniformly distributed on the outer side of the needle core seat 2, and a plurality of reinforcing ribs 17 are uniformly distributed on the outer side of the needle core seat 1; the anti-slip vertical bar 25 can be used as a handle part when the needle core seat 2 is disassembled, and the design of the reinforcing ribs 17 increases the overall strength of the needle tube seat 1.

As shown in fig. 7 and 8, the second embodiment is different from the first embodiment in that the needle tube positioning ring 12 and the needle core positioning ring 22 are distributed on the inner walls of the through hole 11 and the needle core mounting groove 21 in a thread shape; through the screw thread form distribution design of holding ring, when bone drill applys torsion to bone marrow pjncture needle, the area of contact between colloid and the holding ring terminal surface on its torsion direction increases, and then increases the fastness of gluing department, improves bone marrow pjncture needle's anticreep nature.

When the technical scheme is implemented, the needle core 5 is inserted into the needle core positioning ring 22, UV glue is injected into the needle core mounting groove 21 from the glue injection through groove 13, the needle base 1 is matched and screwed with the luer female head 24 of the needle core base 2 through the luer male head 16, then the needle tube 4 is penetrated from the upper side of the needle core 5 and inserted into the needle tube positioning ring 12, the needle tube 4 is rotated to enable the inclined edge surface of the needle tube tip 41 and the conical surface of the needle tip 51 to form a coplanar, the UV glue is injected into the needle tube mounting part of the through hole 11 from the glue injection through groove 13 of the needle tube positioning ring 12, and after the glue is formed, the assembly of the bone marrow puncture needle is completed; when the needle core seat is used in operation, the inner hexagonal groove 23 or the outer hexagonal lug 26 at the bottom of the needle core seat 2 is connected with a bone drill in an adapting way, the bone drill is carried out at the position where a patient needs to operate, the surface of the needle core seat 1 is contacted with skin through the elastic foam pad 7, after the bone drill is finished, the anti-slip vertical bar 25 at the outer side of the needle core seat 2 is held by hands, the needle core seat 2 is disassembled and taken out, and the luer male head 16 of the needle core seat 1 is connected with an infusion device interface, so that the establishment of an intravenous infusion path is completed.

Claims (10)

1. The utility model provides a marrow pjncture needle, includes needle core, needle tubing, needle core seat and needle tube seat, is equipped with the through-hole on the needle tube seat, and the needle tubing inserts in the through-hole and is connected with the needle tube seat, and needle tube seat bottom is connected with the needle core seat can be dismantled, is equipped with on the needle core seat with the needle core mounting groove of through-hole coaxial line, in the needle core mounting groove was inserted to the one end of needle core, the needle tube inside of the other end through the through-hole of needle core wears out, its characterized in that: the inner wall of the through hole or the needle core mounting groove is respectively provided with a positioning ring for positioning the needle tube or the needle core, and the positioning ring is provided with a glue injection through groove communicated with the through hole or the needle core mounting groove.

2. A bone marrow puncture needle according to claim 1, characterized in that: the locating rings on the through holes are needle tube locating rings, at least two groups of needle tube locating rings are respectively axially arranged on the inner wall of the through holes in parallel, and at least two glue injection through grooves are formed in each needle tube locating ring.

3. A bone marrow puncture needle according to claim 2, characterized in that: the glue injection through grooves on the needle tube positioning ring which are axially and parallelly arranged between the inner walls of the through holes are distributed in a staggered manner.

4. A bone marrow puncture needle according to claim 1, characterized in that: the positioning rings on the needle core mounting grooves are at least two groups of needle core positioning rings, the needle core positioning rings are respectively axially arranged on the inner wall of the needle core mounting grooves in parallel, and the number of glue injection through grooves on each needle core positioning ring is at least two.

5. A bone marrow puncture needle according to claim 4, characterized in that: the glue injection through grooves on the needle core positioning ring which are axially arranged in parallel between the inner walls of the needle core mounting grooves are distributed in a staggered manner.

6. A bone marrow puncture needle according to claim 1, characterized in that: the locating rings are distributed on the inner wall of the through hole or the needle core mounting groove in a threaded mode.

7. A bone marrow puncture needle according to claim 2, characterized in that: the through hole comprises a needle tube installation part and a needle core guide part, the needle tube positioning ring is arranged on the inner wall of the needle tube installation part of the through hole, the cross section of the needle core guide part of the through hole is funnel-shaped, the small opening end of the needle core guide part is communicated with the needle tube installation part, and the inner diameter of the small opening end of the needle core guide part is smaller than the inner diameter of the needle tube positioning ring.

8. A bone marrow puncture needle according to claim 1, characterized in that: the needle tube seat comprises a needle tube seat body, and is characterized in that an annular groove is formed in the top end of the needle tube seat, an elastic foam pad is arranged on the surface of the needle tube seat outside the annular groove, and the elastic foam pad is adhered to the surface of the needle tube seat.

9. A bone marrow puncture needle according to any one of claims 1-8, wherein: the needle core is characterized in that a pyramid-shaped needle point is arranged at the top of the needle core, knurling or side cutting surfaces are arranged at the bottom of the needle core, needle tube tips with multi-surface inclined cutting edges are arranged at the top of the needle tube, and the inclined cutting surfaces of the needle tube tips and the conical surface of the needle point form coplanar assembly.

10. A bone marrow puncture needle according to claim 9, characterized in that: the bottom of the needle core seat is provided with an inner hexagonal groove or an outer hexagonal lug which is used for being matched with a bone drill, and a neodymium magnetic sheet is arranged in the inner hexagonal groove or on the outer hexagonal lug.

Images