CN206621376U - A kind of marrow puncture device - Google Patents

Abstract

A kind of marrow puncture device, is related to medicine equipment, solve existing marrow puncture needle is inconvenient for operation, nook closing member locking loosely, can not accurate adjustment depth of needle, without the technical problem for specifying ear-lobe hemospast tool.The utility model includes hollow puncture needle and nook closing member, and the inner chamber of nook closing member and hollow puncture needle coordinates, and external screw thread is provided with the middle part of hollow puncture needle outer wall, is equipped with adjustable fixture with external screw thread and reinforces pipe fitting；Hollow puncture needle one end is provided with hollow cutting edge, and the other end, which is provided with, holds pin handle, holds pin handle end and is provided with rectangular channel, rectangular channel is provided with annular nook closing member embeded slot holding pin handle base, hollow puncture needle outer wall is provided with scale；Nook closing member is fitted together to handle, core tail handle and ear-lobe by cylindrical core bar, nook closing member and takes blood pin to form；Adjustable fixture is made up of annular disc and sleeve pipe, and annular disc and sleeve pipe are structure as a whole, and sleeve lining is provided with the internal thread engaged with the external screw thread.The utility model is used for medical diagnosis inspection, has the advantages of rational in infrastructure, easy to operate, puncture is safe.

Description

A bone marrow puncture device

technical field

The utility model belongs to the technical field of medical instruments, in particular to a bone marrow puncture device improved on a bone marrow puncture needle.

Background technique

Bone marrow aspiration is a more commonly used diagnostic technique in which bone marrow fluid is aspirated through a needle. It can be used for diagnostic examinations in cytology, bacteriology and parasitology.

At present, there are many disadvantages in the actual operation of bone marrow puncture needles commonly used in clinical practice: 1. The bone marrow puncture needle is relatively thick, and it needs to be rotated left and right with the pressure of the wrist during the puncture process to insert the needle into the medullary cavity. Uncomfortable grip, weak lock of the needle core, etc., make the needle core pushed out by the bone, resulting in failure of bone penetration; The needle can only roughly adjust the depth of the needle, and cannot accurately adjust the depth of the needle according to the different needs of each person; 3. During bone marrow puncture, it is often necessary to collect earlobe blood for comparison between peripheral blood smears and bone marrow smears to improve Diagnostic accuracy, but there is no designated earlobe puncture needle in the bone puncture kit commonly used in clinical practice, and it is easy to cause cross infection when other puncture needles are used instead.

Contents of the invention

The purpose of this utility model is to overcome the shortcomings of the prior art, provide a bone marrow puncture device, solve the problems of the existing bone marrow puncture needles, such as uncomfortable hand feeling, weak lock of the needle core, inability to adjust the depth of the needle more accurately, and no Designated earlobe blood-taking equipment and technical problems of inconvenient operation.

The utility model is achieved through the following technical solutions:

A bone marrow puncture device, comprising a hollow puncture needle and a needle core, the needle core cooperates with the inner cavity of the hollow puncture needle, wherein:

The middle part of the outer wall of the hollow puncture needle is provided with an external thread, and an adjustable fixing piece and a reinforcing pipe are provided to match the external thread;

One end of the hollow puncture needle is provided with a hollow cutting edge, the other end is provided with a needle-holding handle, the end of the needle-holding handle is provided with a rectangular groove, and the bottom of the needle-holding handle is provided with a ring-shaped needle core for fitting perpendicular to the rectangular groove. groove, the outer wall of the hollow puncture needle near the hollow cutting edge is provided with a scale;

The needle core is composed of a cylindrical core rod, a needle core fitting handle, a core tail handle and an earlobe blood-taking needle. The end of the cylindrical core rod is a solid cutting edge, and the solid cutting edge and the hollow cutting edge The angle of inclination is the same and on the same plane, the other end of the cylindrical mandrel is perpendicular to the axis of the mandrel, and the mandrel handle is arranged, and at the place where the cylindrical mandrel is close to the mandrel handle, a The needle core fitting handle matched with the annular needle core fitting groove, and the earlobe blood taking needle is detachably arranged at the end of the core tail handle;

The adjustable fixing part is composed of an annular disc and a sleeve, the annular disc and the sleeve are integrally structured, the center line of the sleeve is perpendicular to the annular disc, and the inner wall of the sleeve is provided with a an internal thread to which said external thread engages;

The inner wall of the reinforcing tube is provided with a reinforcing tube internal thread engaged with the external thread, the reinforcing tube is arranged between the adjustable fixing part and the needle-holding handle, and passes through the internal thread of the reinforcing tube and the hollow The needle engages the connection.

Compared with the prior art, the utility model is equipped with a needle-holding handle on the hollow puncture needle, which can improve the comfort of the palm of the medical staff during the puncture process, facilitate grasping, and conform to the design of human body mechanics; the hollow puncture needle has a rectangular groove and an annular The setting of the needle core fitting groove and the design of the needle core fitting handle matched with the annular needle core fitting groove can securely lock the needle core and the hollow puncture needle to prevent the needle core from being ejected by the bone, which may cause Bone puncture failed; there is a scale on the outer wall of the end of the hollow puncture needle near the hollow cutting edge, and the depth of the needle can be adjusted accurately according to the different needs of each person. The position of the needle insertion depth is fixed; the earlobe blood-taking needle is detachably set at the end of the core tail handle, which can effectively avoid cross-infection caused by using other puncture needles.

The utility model can be used for diagnostic examinations in cytology, bacteriology and parasitology, etc., can improve the operating comfort of medical workers, improve needle core locking is not firm, can not adjust the depth of needle insertion more accurately, and has no designated earlobe The blood-taking instrument is easy to cause cross-infection and cumbersome to operate. The utility model has the advantages of reasonable structure, convenient operation and safe puncture.

Description of drawings

Fig. 1 is the internal structure schematic diagram of the present utility model;

Fig. 2 is a structural schematic diagram of a hollow puncture needle of the present invention;

Fig. 3 is the schematic diagram of needle core structure of the present utility model;

Fig. 4 is a structural schematic diagram of the adjustable fixing member of the present invention;

Fig. 5 is the overall structure schematic diagram of the utility model;

Fig. 6 is a structural schematic diagram of a reinforced pipe fitting of the present invention;

Fig. 7 is the left view of Fig. 2;

FIG. 8 is a schematic cross-sectional view of A-A in FIG. 2 .

detailed description

The technical solutions of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings and embodiments.

As shown in Figures 1 to 8, a bone marrow puncture device includes a hollow puncture needle 1 and a needle core 3, the needle core 3 cooperates with the inner cavity of the hollow puncture needle 1, wherein:

The middle part of the outer wall of the hollow puncture needle 1 is provided with an external thread 1-2, and an adjustable fixing part 2 and a reinforcing pipe part 4 are provided to cooperate with the external thread 1-2;

One end of the hollow puncture needle 1 is provided with a hollow cutting edge 1-1, and the other end is provided with a needle-holding handle 1-3. The end of the needle-holding handle 1-3 is provided with a rectangular groove 1-5. The bottom of the handle 1-3 is perpendicular to the rectangular groove 1-5 and is provided with an annular needle core fitting groove 1-4, and the outer wall of the hollow puncture needle 1 close to the hollow cutting edge 1-1 is provided with a scale 1-6;

The needle core 3 is composed of a cylindrical core rod 3-1, a needle core fitting handle 3-2, a core tail handle 3-3 and an earlobe blood collection needle 3-4, and the end of the cylindrical core rod 3-1 It is a solid cutting edge 3-1-1, the inclination angle of the solid cutting edge 3-1-1 is the same as that of the hollow cutting edge 1-1, and they are on the same plane, and the other end of the cylindrical core rod 3-1 The core tail handle 3-3 is arranged perpendicular to the axis of the core rod, and a fitting groove 1-4 for the annular needle core is provided at the place where the cylindrical core rod 3-1 is close to the core tail handle 3-3 The matching needle core fitting handle 3-2, the earlobe blood taking needle 3-4 is detachably arranged at the end of the core tail handle 3-3;

The adjustable fixing part 2 is composed of an annular disc 2-1 and a sleeve 2-2, the annular disc 2-1 and the sleeve 2-2 are integrally structured, and the center line of the sleeve 2-2 Perpendicular to the annular disc 2-1, the inner wall of the sleeve 2-2 is provided with an internal thread 2-2-1 engaged with the external thread 1-2; rotating the annular disc 2-1 can drive the sleeve 2-2 Make the internal thread 2-2-1 mesh with the external thread 1-2 of the hollow puncture needle 1 for transmission, so as to realize the adjustment of the needle insertion depth;

The inner wall of the reinforcing tube 4 is provided with a reinforcing tube internal thread 4-1 engaged with the external thread 1-2, and the reinforcing tube 4 is arranged between the adjustable fixing part 2 and the needle-holding handle 1-3 , and engage and position with the hollow puncture needle 1 through the internal thread 4-1 of the reinforcing tube.

Working process and principle of the present utility model:

As shown in Figures 1 to 8, when in use, the operator first inserts the needle core 3 into the hollow puncture needle 1, and during the insertion process, rotates the needle core 3 by 90 degrees so that the needle core fitting handle 3-2 passes through Rectangular groove 1-5 reaches annular needle core fitting groove 1-4, and needle core 3 is rotated 90 degrees again, and needle core fitting handle 3-2 is embedded in annular needle core fitting groove 1-4, realizes needle core 3 and The solid locking of the hollow puncture needle 1, at this time, the inclination angle of the solid cutting edge 3-1-1 and the hollow cutting edge 1-1 are the same and on the same plane; After entering the bone marrow cavity through subcutaneous, fat, muscle and other tissues, according to the different needs of each person, the needle insertion depth can be adjusted accurately through the adjustable fixing part 2. Fix it, then rotate the needle core 3 by 90 degrees and pull it out, use a 20ml syringe to draw an appropriate amount of bone marrow fluid for inspection;

After the bone marrow fluid is extracted, insert the needle core 3 into the hollow puncture needle 1 again, and tighten it by rotating, then pull out the bone marrow puncture device and press to stop the bleeding;

After sterilizing the earlobe, remove the earlobe blood needle 3-4 at the end of the core handle 3-3, pierce the earlobe with the earlobe blood needle 3-4 and squeeze the bleeding, wipe off the first drop of blood, and then use The glass slide was dipped in the earlobe blood, and the smear was sent for inspection.

The utility model can be implemented in various forms without departing from the spirit or essence of the invention, so it should be understood that the above-mentioned embodiments are not limited to the foregoing details, but should be interpreted broadly within the scope defined by the claims, and therefore fall into the scope of the claims. Changes and modifications within the equivalent range thereof shall be covered by the claims.

Claims (1)

1. a kind of marrow puncture device, including hollow puncture needle (1) and nook closing member (3), the nook closing member (3) and hollow puncture needle (1) Inner chamber coordinate, it is characterised in that：

External screw thread (1-2) is provided with the middle part of the outer wall of the hollow puncture needle (1), being provided with for being engaged with external screw thread (1-2) can Adjust fixture (2) and reinforce pipe fitting (4)；

Described hollow puncture needle (1) one end is provided with hollow cutting edge (1-1), and the other end, which is provided with, holds pin handle (1-3), described to hold Pin handle (1-3) end set has rectangular channel (1-5), is set in pin handle (1-3) bottom of holding perpendicular to rectangular channel (1-5) There is annular nook closing member embeded slot (1-4), the hollow puncture needle (1) is provided with scale (1- close to hollow cutting edge (1-1) one end outer wall 6)；

The nook closing member (3) is fitted together to handle (3-2), core tail handle (3-3) and ear-lobe by cylindrical core bar (3-1), nook closing member and takes blood pin (3- 4) form, cylindrical core bar (3-1) termination is solid cutting edge (3-1-1), the solid cutting edge (3-1-1) with it is described hollow The angle of inclination of cutting edge (1-1) is identical and in same plane, and cylindrical core bar (3-1) other end is perpendicular to core bar axis The core tail handle (3-3) is set, in the cylindrical core bar (3-1) close to core tail handle (3-3) place, is provided with and institute State the nook closing member that annular nook closing member embeded slot (1-4) is engaged and be fitted together to handle (3-2), the ear-lobe takes blood pin (3-4) dismountable It is arranged on core tail handle (3-3) end；

The adjustable fixture (2) is made up of annular disc (2-1) and sleeve pipe (2-2), the annular disc (2-1) and sleeve pipe (2-2) is structure as a whole, and the central axis of described sleeve pipe (2-2) is in the annular disc (2-1), described sleeve pipe (2-2) Wall is provided with the internal thread (2-2-1) engaged with the external screw thread (1-2)；

Described reinforcing pipe fitting (4) inwall is provided with the reinforcing pipe internal thread (4-1) engaged with the external screw thread (1-2), described to add Gu pipe fitting (4) be arranged on the adjustable fixture (2) and it is described hold pin handle (1-3) between, and by the reinforcing pipe Screw thread (4-1) engages connection with the hollow puncture needle (1).