CN210697698U

CN210697698U - Bone marrow sampler for medical examination

Info

Publication number: CN210697698U
Application number: CN201921086313.8U
Authority: CN
Inventors: 王若颖; 张�杰; 岳乔宁
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-07-12
Filing date: 2019-07-12
Publication date: 2020-06-09
Anticipated expiration: 2029-07-12

Abstract

The utility model belongs to the technical field of medical equipment, especially, be a bone marrow sampler for medical science inspection, including negative pressure chamber, back lid, connecting rod, sealing piston, spring, syringe needle, connecting rod handle and switch hook, the welding of one side of back lid has the fixed block, it installs threaded sleeve to rotate on the fixed block, threaded sleeve installs the lead screw in the thread, the negative pressure intracavity is equipped with the fall way, be equipped with the scale on the fall way, sliding mounting has the slider in the fall way, the bottom welding of slider has the carriage release lever, the bottom of carriage release lever with sealing piston fixed connection. The utility model is simple in operation, convenient to use can avoid too much or too little extraction marrow to the extraction volume accurate positioning of marrow, has guaranteed the required volume of inspection promptly, has certain guard action to the patient.

Description

Bone marrow sampler for medical examination

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to a marrow sampler for medical science inspection.

Background

Medical equipment refers to instruments, devices, appliances, materials or other items used alone or in combination in the human body, and also includes required software. The medical equipment is the most basic element of medical treatment, scientific research, teaching, institutions and clinical discipline work, namely comprises professional medical equipment and also comprises household medical equipment, and the bone marrow sampler is also one of the medical equipment.

Through search, the dilution-preventing bone marrow sampler with application number 90218707.4 is composed of a needle head, a screw rod, a drainage tube, a negative pressure cavity, a spring, a piston connecting rod and the like, can ensure that the retention time of the needle head in the medullary cavity is short, the bone marrow sucking quantity is easy to control, thereby preventing the bone marrow from being diluted, the structure is simple, the use is convenient, and the dilution-preventing bone marrow sampler is an ideal special medical instrument, but the design has defects, the device pushes up a sealing piston through the spring, so that the bone marrow enters a hose, when the bone marrow is full in the hose, the needle head is pulled out, the reaction speed of personnel is far lower than the spring-up speed in the process, when the needle is pulled out after the bone marrow is full in the hose, the bone marrow is sucked out too much, the injury is caused to a patient, if the needle head is pulled out too early, the extracted bone marrow quantity can not meet the quantity required by inspection, therefore, there is a need for a bone marrow sampler capable of accurately positioning the amount of bone marrow extracted, and a bone marrow sampler for medical examination is proposed for this purpose.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a bone marrow sampler for medical examination.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a bone marrow sampler for medical science inspection, includes negative pressure chamber, back lid, connecting rod, sealing piston, spring, syringe needle, connecting rod handle and switch hook, the welding of one side of back lid has the fixed block, rotate on the fixed block and install the screw sleeve, the lead screw is installed to screw sleeve internal thread, the negative pressure intracavity is equipped with the fall way, be equipped with the scale on the fall way, slidable mounting has the slider in the fall way, the bottom welding of slider has the carriage release lever, the bottom of carriage release lever with sealing piston fixed connection.

Preferably, the top of the screw rod is welded with a fixing rod, and the fixing rod is fixedly connected with the top of the lifting pipe.

Preferably, the rear cover is provided with a sliding hole, and the lifting pipe penetrates through the sliding hole and is in sliding connection with the sliding hole.

Preferably, the bottom of the lifting pipe is provided with a through hole, and the moving rod penetrates through the through hole and is in sliding connection with the through hole.

Preferably, the fixed block is provided with a bearing hole, a bearing is fixedly installed in the bearing hole, and an inner ring of the bearing is fixedly connected with the threaded sleeve.

Preferably, a handle is welded at the bottom of the threaded sleeve.

Compared with the prior art, the beneficial effects of the utility model are that: firstly, the device presses down the connecting rod handle through the matching of a negative pressure cavity, a rear cover, a connecting rod, a sealing piston, a spring, a needle head, a connecting rod handle, a switch hook, a fixed block, a threaded sleeve, a screw rod, a lifting pipe, a slide block, a movable rod, a slide hole, a fixed rod and a handle, so that the switch hook is hooked on the rear cover, the connecting rod handle drives the sealing piston to compress the spring through the connecting rod, the lower part of the sealing piston in the negative pressure cavity is vacuumized, the needle head is inserted into a bone, the switch hook is separated from the rear cover, the sealing piston is lifted under the action of the elastic force of the spring, and then bone marrow is extracted, however, the design is difficult to accurately control the bone marrow extraction amount, when the bone marrow extraction amount is determined, the handle is rotated first, the threaded sleeve is rotated, the screw rod is lifted by the threaded sleeve, the screw rod drives the lifting pipe to move, the elevator tube rises to increase the distance between the inner wall of the top of the elevator tube and the slide block, and the distance between the slide block and the inner wall of the top of the elevator tube is the distance that the connecting rod can rise, so that the negative pressure condition of the negative pressure cavity can be accurately controlled, and the bone marrow extraction amount is determined.

The utility model is simple in operation, convenient to use can avoid too much or too little extraction marrow to the extraction volume accurate positioning of marrow, has guaranteed the required volume of inspection promptly, has certain guard action to the patient.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged schematic view of portion A of FIG. 1;

in the figure: 1. a negative pressure chamber; 2. a rear cover; 3. a connecting rod; 4. a sealing piston; 5. a spring; 6. a needle head; 7. a connecting rod handle; 8. a switch hook; 9. a fixed block; 10. a threaded sleeve; 11. a screw rod; 12. a lifting pipe; 13. a slider; 14. a travel bar; 15. a slide hole; 16. fixing the rod; 17. and (4) carrying out handle.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides a technical solution: a bone marrow sampler for medical examination comprises a negative pressure cavity 1, a rear cover 2, a connecting rod 3, a sealing piston 4, a spring 5, a needle 6, a connecting rod handle 7 and a switch hook 8, wherein a fixed block 9 is welded on one side of the rear cover 2, a threaded sleeve 10 is rotatably installed on the fixed block 9, a lead screw 11 is installed in the threaded sleeve 10 through internal threads, a lifting pipe 12 is arranged in the negative pressure cavity 1, scales are arranged on the lifting pipe 12, a sliding block 13 is slidably installed in the lifting pipe 12, a moving rod 14 is welded at the bottom of the sliding block 13, and the bottom of the moving rod 14 is fixedly connected with the sealing piston 4;

the top of the screw rod 11 is welded with a fixed rod 16, the fixed rod 16 is fixedly connected with the top of the lifting pipe 12, the rear cover 2 is provided with a slide hole 15, the lifting pipe 12 penetrates through the slide hole 15 and is in sliding connection with the slide hole 15, the bottom of the lifting pipe 12 is provided with a through hole, the movable rod 14 penetrates through the through hole and is in sliding connection with the through hole, the fixed block 9 is provided with a bearing hole, a bearing is fixedly arranged in the bearing hole, the inner ring of the bearing is fixedly connected with the threaded sleeve 10, the bottom of the threaded sleeve 10 is welded with a handle 17, the switch hook 8, the fixed block 9, the threaded sleeve 10, the screw rod 11, the lifting pipe 12, the sliding block 13, the movable rod 14, the slide hole 15, the fixed rod 16 and the handle 17 are matched with each other, the connecting rod handle 7 is pressed down, the switch hook 8 is hooked on the rear cover 2, the connecting rod handle 7 drives the sealing piston 4 to compress the spring 5 through the connecting, the vacuum is formed below the sealing piston 4 in the negative pressure cavity 1, the needle head is inserted into the bone, the switch hook 8 is separated from the rear cover 2, the sealing piston 4 is lifted under the action of the elastic force of the spring 5, and therefore the bone marrow is extracted, however, the design is difficult to accurately control the amount of the extracted bone marrow, when the bone marrow extraction amount is determined, the handle 17 is firstly rotated to rotate the threaded sleeve 10, the threaded sleeve 10 enables the screw rod 11 to ascend, the screw rod 11 drives the lifting pipe 12 to move upwards through the fixed rod 16, the amount of the extracted bone marrow can be determined by observing the scale on the lifting pipe 12, the lifting pipe 12 ascends, the distance between the top inner wall of the lifting pipe 12 and the sliding block 13 is increased, the distance between the sliding block 13 and the top inner wall of the lifting pipe 12 is the distance that the connecting rod 3 can ascend, so that the negative pressure condition of the negative pressure cavity 1 can be accurately controlled. The utility model is simple in operation, convenient to use can avoid too much or too little extraction marrow to the extraction volume accurate positioning of marrow, has guaranteed the required volume of inspection promptly, has certain guard action to the patient.

The working principle is as follows: when the bone marrow aspiration device is used, the connecting rod handle 7 is pressed down to enable the switch hook 8 to be hooked on the rear cover 2, the connecting rod handle 7 drives the sealing piston 4 to compress the spring 5 through the connecting rod 3, the lower part of the sealing piston 4 in the negative pressure cavity 1 is vacuumized, the needle head is inserted into a bone, the switch hook 8 is separated from the rear cover 2, the sealing piston 4 is lifted under the action of the elastic force of the spring 5, so that bone marrow is extracted, however, the bone marrow aspiration quantity is difficult to accurately control by the design, when the bone marrow aspiration quantity is determined, the handle 17 is firstly rotated to rotate the threaded sleeve 10, the threaded sleeve 10 enables the lead screw 11 to be lifted, the lead screw 11 drives the lifting pipe 12 to move upwards through the fixed rod 16, the bone marrow aspiration quantity can be determined by observing scales on the lifting pipe 12, the lifting pipe 12 is lifted, the distance between the top inner wall of the lifting pipe 12 and the sliding block 13 is increased, and the distance between the sliding block 13 and the, therefore, the negative pressure condition of the negative pressure cavity 1 can be accurately controlled, and the bone marrow extraction amount can be determined.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a bone marrow sampler for medical science inspection, includes negative pressure chamber (1), back lid (2), connecting rod (3), sealed piston (4), spring (5), syringe needle (6), connecting rod handle (7) and switch hook (8), its characterized in that: one side welding of back lid (2) has fixed block (9), it installs threaded sleeve (10) to rotate on fixed block (9), lead screw (11) are installed to threaded sleeve (10) internal thread, be equipped with fall way (12) in negative pressure chamber (1), be equipped with the scale on fall way (12), slidable mounting has slider (13) in fall way (12), the bottom welding of slider (13) has carriage release lever (14), the bottom of carriage release lever (14) with sealed piston (4) fixed connection.

2. A bone marrow sampler for medical examination according to claim 1, wherein: the top welding of lead screw (11) has dead lever (16), dead lever (16) with the top fixed connection of fall way (12).

3. A bone marrow sampler for medical examination according to claim 1, wherein: a sliding hole (15) is formed in the rear cover (2), and the lifting pipe (12) penetrates through the sliding hole (15) and is in sliding connection with the sliding hole (15).

4. A bone marrow sampler for medical examination according to claim 1, wherein: the bottom of the lifting pipe (12) is provided with a through hole, and the moving rod (14) penetrates through the through hole and is in sliding connection with the through hole.

5. A bone marrow sampler for medical examination according to claim 1, wherein: the bearing hole is formed in the fixing block (9), a bearing is fixedly mounted in the bearing hole, and an inner ring of the bearing is fixedly connected with the threaded sleeve (10).

6. A bone marrow sampler for medical examination according to claim 1, wherein: and a handle (17) is welded at the bottom of the threaded sleeve (10).