CN217853065U - Marrow puncture extraction device - Google Patents

Abstract

The utility model provides a marrow puncture draw-out device belongs to marrow puncture technical field. Comprises a needle cylinder, a hollow needle core and a positioning block; the needle cylinder is of a double-layer structure, a gap is reserved between the two layers to serve as a liquid medicine flow passage, and cutting edges are uniformly arranged at the top end of the needle head of the needle cylinder along the circumferential direction; the hollow needle core is sleeved in the needle cylinder, the outer wall of the hollow needle core is connected with the inner wall of the needle cylinder through threads, and a drill blade is arranged at the top end of the needle head of the hollow needle core along the circumferential direction; the bottom of the positioning block is in the shape of a sucker, and the center of the positioning block is provided with a positioning hole matched with the outer diameter of the needle cylinder. The utility model adopts the sucker type positioning block, thereby effectively preventing the needle cylinder from inclining and ensuring firm positioning; the liquid medicine flow channel in the double-layer syringe is matched with the injection flow channel on the handle, and anesthetic or blood anticoagulant can be injected into the bone in the process of marrow puncture and extraction; the hollow needle core adopts a spiral needle inserting mode, so that the stability is good, the speed is high, the needle does not need to be pulled out after the needle is inserted, the control is easy, and the work burden of medical staff is reduced.

Description

Marrow puncture extraction device

Technical Field

The utility model belongs to the technical field of the marrow puncture, especially, relate to a marrow puncture draw-out device.

Background

Currently, when a common bone marrow puncture needle collects bone marrow, a needle core is inserted into a needle tube and protrudes from the head of the needle tube, a handle is rotated to make a needle head on the needle core penetrate through the skin and enter the ilium, and then the needle core is extracted and the needle tube is detained in the bone marrow for subsequent use.

When the bone marrow puncture extraction device is used, generally, medical personnel manually determine the puncture position and manually expand the skin at the positioning part, so that the positioning effect is not good enough, the accuracy is not high enough, and the deviation is easy to generate. In addition, the process of pulling out the needle core brings certain discomfort to the patient, the risk of infection exists, and the operation process is complex.

SUMMERY OF THE UTILITY MODEL

In order to solve the defects of the prior marrow puncture extracting device, the utility model provides a marrow puncture extracting device which has accurate positioning and convenient operation.

The utility model adopts the following technical scheme:

a marrow puncture extraction device, which comprises a needle cylinder, a hollow needle core and a positioning block; the needle cylinder is of a double-layer structure, a gap is reserved between the two layers to serve as a liquid medicine flow channel, and cutting edges are uniformly arranged at the top end of the needle head of the needle cylinder along the circumferential direction;

the hollow needle core is sleeved in the needle cylinder, the outer wall of the hollow needle core is connected with the inner wall of the needle cylinder through threads, and drill blades are uniformly arranged at the top end of the needle head of the hollow needle core along the circumferential direction;

the bottom of the positioning block is in a sucking disc shape, and a positioning hole matched with the outer diameter of the needle cylinder is formed in the center of the positioning block.

As the optimization of the utility model, the top end of the needle head of the hollow needle core is provided with a plurality of through holes.

As the optimization of the utility model, the outer wall of the needle cylinder and the outer wall of the hollow needle core are provided with scales.

As the utility model discloses a preferred, the locating piece include location flat board, support column and location arc board down, last location flat board pass through the support column and be connected with location arc board down.

Preferably, the center of the lower positioning arc plate is flat, and the edge of the lower positioning arc plate is an arc bent downwards.

As the optimization of the utility model, the tail end of the needle cylinder is connected with the first handle, and the first handle is internally provided with an injection flow passage communicated with a liquid medicine flow passage.

Preferably, the injection port of the injection runner is sealed by a rubber plug.

As the utility model discloses a preferred, the trailing end connection of cavity nook closing member have the negative pressure collecting pipe, and be equipped with the second handle that is used for rotating the cavity nook closing member in the junction.

As the utility model discloses a preferred, the up end of second handle be equipped with the connecting portion of outband screw thread, the up end of negative pressure collecting pipe and second handle pass through threaded connection.

Compared with the existing bone marrow puncture and extraction device, the utility model adopts the sucker type positioning block, thereby effectively preventing the needle cylinder from inclining and ensuring firm positioning; the liquid medicine flow channel in the double-layer syringe is matched with the injection flow channel on the handle, and anesthetic or blood anticoagulant can be injected into the bone in the process of marrow puncture and extraction; the hollow needle core adopts a spiral needle inserting mode, so that the stability is good, the speed is high, the accuracy is high, the needle does not need to be pulled out after the needle is inserted, the control is easy, and the work burden of medical staff is reduced.

Drawings

Fig. 1 is a schematic view of the overall structure of the bone marrow aspiration device of the present invention;

FIG. 2 is a cross-sectional view of the bone marrow aspiration needle of the present invention;

FIG. 3 is a cross-sectional view of the bone marrow puncture positioning block of the present invention;

FIG. 4 is an enlarged partial view of the first handle and needle cannula;

FIG. 5 is an enlarged partial view of the hub fully inside the barrel;

FIG. 6 is an enlarged partial view of the hub extending from the base of the barrel;

in the figure: 1-needle cylinder, 11-cutting edge, 12-liquid medicine flow channel, 2-first handle, 21-injection flow channel, 3-needle core, 31-second handle, 32-through hole, 33-drilling edge, 4-positioning block, 41-upper positioning flat plate, 42-supporting column, 43-lower positioning arc plate, 44-positioning hole, 5-negative pressure collecting pipe and 6-rubber plug.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

As shown in fig. 1-2, the bone marrow aspiration device disclosed in the present invention comprises a needle cylinder 1, a hollow needle core 3 and a positioning block 4; scales are arranged on the outer wall of the needle cylinder 1 and the outer wall of the hollow needle core 3.

The syringe 1 is of a double-layer structure, a gap is reserved between the two layers to serve as a liquid medicine flow passage 12, and cutting edges 11 are uniformly arranged at the top end of the needle head of the syringe 1 along the circumferential direction. As shown in fig. 4, the rear end of the syringe 1 is connected to a first handle 2, an injection flow channel 21 communicating with the medical fluid flow channel 12 is provided in the first handle, and an injection port of the injection flow channel 21 is sealed by a rubber stopper 6.

The hollow needle core 3 is sleeved in the needle cylinder 1, the outer wall of the hollow needle core 3 is in threaded connection with the inner wall of the needle cylinder 1, and drill blades 33 are uniformly arranged at the top end of the needle head of the hollow needle core 3 along the circumferential direction.

The bottom of the positioning block 4 is in a sucking disc shape, and the center of the positioning block is provided with a positioning hole 44 matched with the outer diameter of the needle cylinder 1; the sucking disc-shaped positioning block can suck the skin, the positioning is accurate, and the manual operation process of unfolding the skin can be replaced.

As shown in fig. 3, the positioning block 4 includes an upper positioning flat plate 41, a supporting column 42 and a lower positioning arc plate 43, and the upper positioning flat plate 41 is connected to the lower positioning arc plate 43 through the supporting column 42; the center of the lower positioning arc plate 43 is flat and has the same structure as the upper positioning flat plate 41, the edge of the lower positioning arc plate 43 is in an arc shape bent downwards, and the radian is smaller; the centers of the upper positioning flat plate 41 and the lower positioning arc plate 43 are provided with a through positioning hole 44. In the using process, the positioning holes are aligned to the marks on the skin, the lower positioning arc plate 43 is pressed tightly on the skin, the outer edge is firstly contacted with the skin in the pressing process, and the outer edge can push the skin outwards in the pressing process continuously, so that the action of unfolding the skin is realized; after the pressing, the lower positioning arc plate 43 and the skin generate a suction force, and the positioning block is not easy to slide off. The structure of the upper and lower positioning plates increases the thickness of the positioning block on one hand, and is convenient to operate; on the other hand, because all be equipped with the locating hole on the locating plate about, the cylinder is difficult for inclining in the actual operation in-process, and the location is more accurate.

The top end of the needle head of the hollow needle core 3 is provided with a plurality of through holes, so that the liquid flux of the needle core is improved, and the bone marrow collection efficiency is improved. The tail end of the hollow needle core 3 is connected with a negative pressure collecting pipe 5, and a second handle 31 for rotating the hollow needle core 3 is arranged at the joint. In this embodiment, a connection part with external threads is disposed on the upper end surface of the second handle 31, and the negative pressure collecting pipe 5 is connected with the upper end surface of the second handle 31 through threads. After the bone puncture is finished, bone marrow is sucked, and the negative pressure collecting pipe 5 sucks the bone marrow into the negative pressure collecting pipe 5 through the inner cavity of the hollow needle core by means of negative pressure generated by an external negative pressure device. The connection process of the negative pressure collecting pipe 5 and the external negative pressure device is not shown in the figure, and the common operation mode in the field can be adopted, for example, a vacuum peristaltic pump is used as the negative pressure device and is connected with the side wall or the bottom of the negative pressure collecting pipe; or a piston is arranged in the negative pressure collecting pipe, and negative pressure is provided by stretching the piston.

In one embodiment of the present invention, the liquid medicine passage in the needle cylinder facilitates the direct injection of anesthetic or heparin sodium diluent through the injection passage 21 during the puncturing procedure. For example, the needle cylinder is inserted into muscle, anesthetic is injected after the muscle puncture is completed, and after the anesthetic acts, the needle core is rotated to perform bone puncture. Or, after the needle core finishes the bone puncture, heparin sodium diluent is injected, and the blood anticoagulant liquid is added in advance, so that the probability of blood coagulation in the drawing process is reduced.

The bone marrow puncture extraction device comprises the following use processes:

marking a bone marrow puncture position on the back of a patient after the patient lies prone, cleaning the bone marrow puncture position with alcohol, and locally anaesthetizing; the positioning holes in the positioning blocks are aligned to the marks, and the positioning blocks are lightly pressed, so that the lower positioning arc plate is in contact with the skin, the skin is unfolded and sucked, and the puncture work is facilitated.

Inserting the needle cylinder into the positioning hole, and then retracting the needle core inside the needle cylinder, as shown in fig. 5; the muscle puncture length is estimated, and the needle cylinder is used for muscle puncture. When the needle cylinder reaches a designated point, the needle core is used for bone puncture, and the second handle is rotated to insert the needle core into the bone in a screw needle inserting mode due to the threaded connection of the needle core and the needle cylinder, as shown in fig. 6, the first handle needs to be held tightly in the process of rotating the needle core to prevent the needle cylinder from rotating together. After the bone puncture is finished, the needle cylinder is slightly pushed into the bone, anesthetic or heparin sodium diluent is injected into the liquid medicine flow channel in the needle cylinder through the injection flow channel, the anesthetic helps to relieve the pain of a patient for the second time, and the heparin sodium diluent helps to reduce the coagulation of blood in the extraction process. The negative pressure collecting tube is started to suck the bone marrow.

And after the suction is finished, rotating the needle core anticlockwise to enable the needle core to be retracted into the needle cylinder, pulling out the needle cylinder, slightly rotating the positioning block and taking down the positioning block. The process is easy to control, and the workload of medical staff is reduced.

The foregoing descriptions are only directed to specific embodiments of the present invention. Obviously, the present invention is not limited to the above embodiments, and many modifications are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the invention should be considered as within the scope of the invention.

Claims (9)

1. A marrow puncture extraction device, which is characterized by comprising a needle cylinder (1), a hollow needle core (3) and a positioning block (4); the syringe (1) is of a double-layer structure, a gap is reserved between the two layers to serve as a liquid medicine flow passage (12), and cutting edges (11) are uniformly arranged at the top end of the needle head of the syringe (1) along the circumferential direction;

the hollow needle core (3) is sleeved in the needle cylinder (1), the outer wall of the hollow needle core (3) is connected with the inner wall of the needle cylinder (1) through threads, and drill blades (33) are uniformly arranged at the top end of the needle head of the hollow needle core (3) along the circumferential direction;

the bottom of the positioning block (4) is in a sucking disc shape, and the center of the positioning block is provided with a positioning hole (44) matched with the outer diameter of the needle cylinder (1).

2. A bone marrow puncture extraction device according to claim 1, characterized in that, a plurality of through holes are provided at the needle tip of the hollow needle core (3).

3. A bone marrow puncture extraction device according to claim 1, characterized in that, the outer wall of the syringe (1) and the outer wall of the hollow needle core (3) are provided with graduations.

4. The bone marrow puncture extraction device according to the claim 1, characterized in that, the positioning block (4) comprises an upper positioning flat plate (41), a supporting column (42) and a lower positioning arc plate (43), the upper positioning flat plate (41) is connected with the lower positioning arc plate (43) through the supporting column (42).

5. A bone marrow puncture extraction device according to claim 4, characterized in that, the center of the lower positioning arc plate (43) is flat, and the edge is arc-shaped bending downwards.

6. The bone marrow puncture extraction device according to the claim 1, characterized in that the tail end of the syringe (1) is connected with a first handle, and an injection flow passage (21) communicated with the liquid medicine flow passage (12) is arranged in the first handle.

7. A bone marrow puncture extraction device according to claim 6, characterized in that, the injection port of the injection flow channel (21) is sealed by a rubber plug (6).

8. A bone marrow puncture and extraction device according to claim 1, characterized in that the tail end of the hollow needle core (3) is connected with a negative pressure collecting tube (5), and a second handle (31) for rotating the hollow needle core (3) is arranged at the connection position.

9. A bone marrow puncture extraction device according to the claim 8, characterized in that, the upper end face of the second handle (31) is provided with a connecting part with external threads, and the negative pressure collecting pipe (5) is connected with the upper end face of the second handle (31) through threads.

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