Bone marrow puncture needle capable of controlling collection quantity

Abstract

The utility model discloses a bone marrow puncture needle capable of controlling collection quantity, which relates to the technical field of medical instruments, and comprises a mounting chamber, the outer wall of the bottom of the mounting chamber is fixedly connected with a vertically arranged needle cylinder, the top of the mounting chamber is fixedly connected with an inlet opposite to the needle cylinder, the inside of the needle cylinder is slidably connected with an extension component, and the extension component is fixedly connected with the needle cylinder. The extending assembly comprises the same extending pipe which is slidably connected to the interior of the needle cylinder and the interior of the inlet, a horizontally-arranged extending column is fixedly connected to one side of the outer wall of the circumference of the extending pipe, a driving ring is rotatably connected to the inner wall of one end of the mounting chamber, and the extending column is slidably sleeved with the driving ring; the rotating end of the driving ring is fixedly connected with an adjusting structure, the outer portion of the needle cylinder is fixedly connected with an abutting assembly, the extending assembly is arranged, the length of the needle cylinder can be increased according to needs, and therefore the needle cylinder can collect more marrow, and the adaptability of the device can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field, concretely is a bone marrow puncture needle of controllable collection amount. BACKGROUND

[0002] Bone marrow biopsy is to take 0.5-1 centimeter long cylindrical sample of keeping complete bone marrow tissue structure to make pathological examination. It can not only understand the component of bone marrow cell and the distribution condition of original cell, but also can observe cell morphology to make pathological diagnosis.

[0003] Through the search, the utility model of patent announcement number CN222604649U discloses a kind of bone marrow puncture needle that can keep stable during puncture, including bone marrow puncture needle main body, the outside of bone marrow puncture needle main body is provided with handle, the handle is used to operator holds puncture needle to improve stability, disassembly component, the disassembly component is used to disassemble handle, the disassembly component is connected with bone marrow puncture needle main body.

[0004] The above device will not meet the demand when the depth of puncture needle is insufficient after puncture needle enters bone marrow cavity if the subcutaneous fat of patient is thicker, and it will inevitably cause that extracted bone marrow tissue cannot meet the demand, and examination failure is inevitable, and it is necessary to re-puncture, thereby increase the pain of patient, inconvenient to use, there is improvement space. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a kind of bone marrow puncture needle of controllable collection amount to solve the problems raised in the above background.

[0006] To achieve the above object, the utility model provides the following technical scheme: a kind of bone marrow puncture needle of controllable collection amount, including installation chamber, the bottom outer wall of installation chamber is fixedly connected with the needle cylinder of vertical arrangement, the top of installation chamber is fixedly connected with the inlet opposite to the needle cylinder, the inside of needle cylinder is slidably connected with extension assembly, the extension assembly includes the same extension pipe of sliding connection in needle cylinder and the inside of inlet, the circumferential outer wall of extension pipe one side is fixedly connected with the extension column of horizontal arrangement, the inner wall of one end of installation chamber is rotatably connected with drive ring, the drive ring is slidably sleeved in the outside of extension column, the rotating end of drive ring is fixedly connected with adjusting structure, the outside of needle cylinder is fixedly connected with abutment component.

[0007] The length of the needle cylinder can be increased as required, so that the needle cylinder can collect more bone marrow, which is beneficial to improve the adaptability of the device. If the penetration depth of the needle cylinder is insufficient, the driving rod moving end is pushed towards the needle cylinder, the driving rod drives the driving ring to overturn inside the installation chamber. Since the extension pipe can only move up and down due to being limited by the installation chamber entrance and the needle cylinder, the driving ring can drive the extension pipe to move downwards through the extension column. Then the extension pipe extends out of the needle cylinder and continues to extend into the bone marrow cavity, so that more bone marrow can be collected at one time.

[0008] As a further preferred embodiment of the present technical solution, the adjusting structure comprises a driving rod fixedly connected to the rotating end of the driving ring, and a reed is fixedly connected to the top end of the driving rod. A plurality of equally distributed clamping grooves are formed in the outer wall of one end of the installation chamber, and the reed is clamped in one of the clamping grooves.

[0009] As a further preferred embodiment of the present technical solution, the abutting assembly comprises a threaded pipe fixedly connected to the top of the circumferential outer wall of the needle cylinder, and a mounting sleeve is threadedly connected to the outside of the threaded pipe. Four equally distributed abutting plates are rotatably connected inside the mounting sleeve, and the four abutting plates are in close contact with each other. Four equally distributed limiting strips are fixedly connected inside the mounting sleeve, and the four limiting strips correspond one-to-one to the end heads of the four abutting plates. A linkage structure is provided on the outside of the threaded pipe.

[0010] As a further preferred embodiment of the present technical solution, the linkage structure comprises a mounting ring rotatably connected to the top of the circumferential outer wall of the threaded pipe, and four equally distributed thin steel wires are fixedly connected to the outside of the mounting ring. One extension block is fixedly connected to one side of each of the four abutting plates that are away from each other, and the bottom end of each of the four thin steel wires is fixedly connected to one of the four extension blocks.

[0011] Twist the mounting sleeve to rotate it outside the threaded pipe. The mounting sleeve will move downwards along the threaded pipe with which it is threadedly engaged. The thin steel wires cannot be stretched, and the mounting ring cannot move downwards. With the movement of the mounting sleeve, the mounting ring can drive the abutting plates to overturn upwards through the thin steel wires and the extension blocks, and finally come into contact with the limiting strips. The abutting plates will then remain perpendicular to the needle cylinder. When the needle cylinder penetrates into the skin, the abutting plates will also adhere to the skin. Under the support of the abutting plates, the puncture needle will remain in a relatively stable state, and shaking of the puncture needle can be avoided to cause discomfort to the patient.

[0012] As a further preferred embodiment of the present technical solution, a magnetic block is embedded in one side of each of the four abutting plates, and each of the four abutting plates is made of stainless steel.

[0013] As a further preferred embodiment of the present technical solution, a needle core is slidably connected inside the entrance at the top of the installation chamber, and the needle core extends into the inside of the extension pipe.

[0014] As a further preferred of the technical scheme, the two outer walls on both sides of the installation chamber are fixedly connected with a handle, and two holding grooves are formed in the bottom outer wall of each handle.

[0015] The utility model provides a bone marrow puncture needle of controllable collection amount has the following beneficial effects:

[0016] (1) the utility model discloses a extension assembly can be set up according to the need increase the length of needle cylinder, so that the bone marrow amount that needle cylinder can gather is more, is favorable to improve the adaptability of device, if the depth of penetration of needle cylinder is insufficient, the driving rod movable end is stirred towards needle cylinder direction, the driving ring is turned over in the installation chamber interior under the drive of driving rod, because extension pipe is limited only to move up and down by installation chamber entrance and needle cylinder, and the driving ring can move down extension pipe by extension column, and then extension pipe extends needle cylinder and continues to extend to the inside of bone marrow cavity, so that more bone marrow can be collected at a time.

[0017] (2) the utility model discloses a abutment component is set up, and the installation sleeve is rotated in the outside of threaded pipe, and the installation sleeve will move down along with the threaded pipe of screwing cooperation, and the thin steel wire cannot be stretched, and the installation ring cannot move down, along with the movement of installation sleeve, and the installation ring can drive the abutment plate to turn over upwards through the thin steel wire and extension block, and finally contact with the limiting strip, and the abutment plate then keeps perpendicular with needle cylinder, when needle cylinder is inserted into the skin, the abutment plate will also be attached to the skin, and under the support of it, the puncture needle will keep the state of relatively stable, and can avoid the discomfort of patient caused by shaking. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the whole structure schematic diagram of the utility model;

[0019] Figure 2 It is the extension assembly enlarged structure schematic diagram of the utility model;

[0020] Figure 3 It is the abutment component enlarged structure schematic diagram of the utility model;

[0021] Figure 4 It is the Figure 2 It is the enlarged structure schematic diagram of A place in the utility model;

[0022] In the drawing: 1, installation chamber;2, needle cylinder;3, needle core;4, extension assembly;5, abutment component;401, extension pipe;402, extension column;403, driving ring;404, driving rod;405, spring leaf;406, clamping groove;501, threaded pipe;502, installation sleeve;503, abutment plate;504, installation ring;505, extension block;506, thin steel wire;507, limiting strip. SPECIFIC EMBODIMENTS

[0023] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model.

[0024] The utility model provides technical scheme: Figure 2 As shown in FIG. 4, in the embodiment, the bone marrow puncture needle capable of controlling the collection amount comprises a mounting chamber 1, a needle cylinder 2 vertically arranged is fixedly connected to the bottom outer wall of the mounting chamber 1, an inlet opposite to the needle cylinder 2 is fixedly connected to the top of the mounting chamber 1, an extension assembly 4 is slidably connected inside the needle cylinder 2 and the inlet, the extension assembly 4 comprises a same extension pipe 401 slidably connected inside the needle cylinder 2 and the inlet, a horizontally arranged extension column 402 is fixedly connected to one side of the circumferential outer wall of the extension pipe 401, a driving ring 403 is rotatably connected to the inner wall of one end of the mounting chamber 1, the driving ring 403 is slidably sleeved outside the extension column 402, an adjusting structure is fixedly connected to the rotating end of the driving ring 403, and an abutting assembly 5 is fixedly connected to the outside of the needle cylinder 2.

[0025] The adjusting structure comprises a driving rod 404 fixedly connected to the rotating end of the driving ring 403, a reed 405 is fixedly connected to one end of the top of the driving rod 404, a plurality of clamping grooves 406 are formed in the outer wall of one end of the mounting chamber 1 at equal intervals, and the reed 405 is clamped inside one of the clamping grooves 406.

[0026] If the penetration depth of the needle cylinder 2 is insufficient, the movable end of the driving rod 404 is pushed towards the needle cylinder 2, the driving rod 404 drives the driving ring 403 to overturn inside the mounting chamber 1, since the extension pipe 401 is limited to move up and down by the inlet of the mounting chamber 1 and the needle cylinder 2, the driving ring 403 can drive the extension pipe 401 to move downwards through the extension column 402, then the extension pipe 401 extends out of the needle cylinder 2 and continues to extend into the bone marrow cavity, so that more bone marrow can be collected at one time, when the driving rod 404 rotates, the reed 405 fixed to the outside of the driving rod 404 is extruded by the corresponding clamping groove 406, then the reed 405 deforms towards the driving rod 404 until the reed 405 reaches the outside of the clamping groove 406 at another position, the deformed reed 405 is no longer limited and will be clamped into the new clamping groove 406 again, so that the position of the driving rod 404 can be limited and the driving rod 404 will not easily overturn.

[0027] As shown in FIG. 4, in the embodiment, the bone marrow puncture needle capable of controlling the collection amount comprises a mounting chamber 1, a needle cylinder 2 vertically arranged is fixedly connected to the bottom outer wall of the mounting chamber 1, an inlet opposite to the needle cylinder 2 is fixedly connected to the top of the mounting chamber 1, an extension assembly 4 is slidably connected inside the needle cylinder 2 and the inlet, the extension assembly 4 comprises a same extension pipe 401 slidably connected inside the needle cylinder 2 and the inlet, a horizontally arranged extension column 402 is fixedly connected to one side of the circumferential outer wall of the extension pipe 401, a driving ring 403 is rotatably connected to the inner wall of one end of the mounting chamber 1, the driving ring 403 is slidably sleeved outside the extension column 402, an adjusting structure is fixedly connected to the rotating end of the driving ring 403, and an abutting assembly 5 is fixedly connected to the outside of the needle cylinder 2. Figure 1 Figure 3 As shown in FIG. 4, in the embodiment, the bone marrow puncture needle capable of controlling the collection amount comprises a mounting chamber 1, a needle cylinder 2 vertically arranged is fixedly connected to the bottom outer wall of the mounting chamber 1, an inlet opposite to the needle cylinder 2 is fixedly connected to the top of the mounting chamber 1, an extension assembly 4 is slidably connected inside the needle cylinder 2 and the inlet, the extension assembly 4 comprises a same extension pipe 401 slidably connected inside the needle cylinder 2 and the inlet, a horizontally arranged extension column 402 is fixedly connected to one side of the circumferential outer wall of the extension pipe 401, a driving ring 403 is rotatably connected to the inner wall of one end of the mounting chamber 1, the driving ring 403 is slidably sleeved outside the extension column 402, an adjusting structure is fixedly connected to the rotating end of the driving ring 403, and an abutting assembly 5 is fixedly connected to the outside of the needle cylinder 2.

[0028] ​The linkage structure includes a mounting ring 504 rotatably connected to the top of the outer circumference of the threaded tube 501. Four equally spaced thin steel wires 506 are fixedly connected to the outside of the mounting ring 504. An extension block 505 is fixedly connected to the side of each of the four abutment plates 503 that is far apart from each other. One bottom end of each of the four thin steel wires 506 is fixedly connected to the four extension blocks 505 respectively.

[0029] Twisting the mounting sleeve 502 causes it to rotate outside the threaded tube 501. The mounting sleeve 502 moves downward along the threaded tube 501 that it is threaded with. The thin steel wire 506 cannot be stretched, and the mounting ring 504 cannot move downward. As the mounting sleeve 502 moves, the mounting ring 504 can drive the abutment plate 503 to flip upward through the thin steel wire 506 and the extension block 505, and finally contact the limiting strip 507. The abutment plate 503 then remains perpendicular to the syringe 2. When the syringe 2 is inserted into the skin, the abutment plate 503 will also adhere to the skin. Under its support, the puncture needle will maintain a relatively stable state, which can prevent it from shaking and causing discomfort to the patient. When not in use, twisting the mounting sleeve 502 in the opposite direction causes the abutment plate 503, which is not stretched, to flip downward under the pressure of the thin steel wire 506 and gravity, and then abut against each other, which can protect the syringe 2.

[0030] like Figure 1 and Figure 3 As shown, a magnetic block is embedded in the interior of one side of each of the four abutment plates 503, and all four abutment plates 503 are made of stainless steel. When the four abutment plates 503 are gathered together, the state of the four abutment plates 503 will be more stable under the attraction of the magnetic block.

[0031] like Figure 1 As shown in Figure 2, a needle core 3 is slidably connected inside the top inlet of the installation chamber 1. The needle core 3 extends into the extension tube 401, which ensures that the puncture needle can accurately enter the bone marrow cavity along the predetermined path, while preventing foreign objects such as bone fragments from entering the syringe and affecting the quality of bone marrow fluid extraction.

[0032] like Figure 1 As shown, a handle is fixedly connected to each of the two outer walls of the installation chamber 1. Two grip grooves are opened on the bottom outer wall of each handle, making it easier to hold and exert force on the device.

[0033] This invention provides a bone marrow aspiration needle with controllable collection volume, the specific working principle of which is as follows:

[0034] When the device is in operation, the mounting sleeve 502 is twisted to rotate it outside the threaded tube 501. The mounting sleeve 502 will move downward along the threaded tube 501 that it is threaded with. The thin steel wire 506 cannot be stretched, and the mounting ring 504 cannot move downward. As the mounting sleeve 502 moves, the mounting ring 504 can drive the abutment plate 503 to flip upward through the thin steel wire 506 and the extension block 505, and finally contact the limiting strip 507. The abutment plate 503 then remains perpendicular to the syringe 2. When the syringe 2 is inserted into the skin, the abutment plate 503 will also adhere to the skin. Under its support, the puncture needle will maintain a relatively stable state, which can prevent it from shaking and causing discomfort to the patient. When not in use, the mounting sleeve 502 is twisted in the opposite direction. The abutment plate 503, which is not stretched, will flip downward under the pressure of the thin steel wire 506 and gravity, and then abut against each other, which can protect the syringe 2.

[0035] The needle core 3 is then removed from the installation chamber 1, and the syringe with the matching piston rod is inserted into the inlet of the installation chamber 1. By pulling the piston rod, a negative pressure is created inside the syringe, thus enabling bone marrow collection. If the insertion depth of the syringe 2 is insufficient, the movable end of the drive rod 404 is moved towards the syringe 2. The drive rod 404 drives the drive ring 403 to rotate inside the installation chamber 1. Since the extension tube 401 is restricted to moving up and down by the inlet of the installation chamber 1 and the syringe 2, the drive ring 403 can drive the extension tube 401 through the extension column 402. 01 moves downwards, and then the extension tube 401 extends out of the syringe 2 and continues to extend into the bone marrow cavity, thereby enabling the collection of more bone marrow at once. When the drive rod 404 rotates, the spring 405 fixed to its outside is squeezed by the corresponding slot 406 and then deforms in the direction of the drive rod 404 until the spring 405 reaches the outside of the slot 406 in another position. The deformed spring 405 is no longer restricted and will be locked into the new slot 406 again, which can limit the position of the drive rod 404 and prevent it from easily flipping over.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bone marrow aspiration needle with controllable collection volume, comprising an installation chamber (1), wherein a vertically arranged syringe (2) is fixedly connected to the bottom outer wall of the installation chamber (1), and an inlet opposite to the syringe (2) is fixedly connected to the top of the installation chamber (1), characterized in that: The needle cylinder (2) is internally connected with an extension assembly (4), the extension assembly (4) comprises an extension pipe (401) which is slidably connected in the needle cylinder (2) and the inlet, the extension pipe (401) is fixedly connected with an extension column (402) which is horizontally arranged on one side of the circumferential outer wall, a driving ring (403) is rotatably connected to the inner wall of one end of the mounting chamber (1), the driving ring (403) is slidably sleeved on the outside of the extension column (402), the driving ring (403) is fixedly connected with an adjusting structure at the rotating end, and the needle cylinder (2) is fixedly connected with an abutting assembly (5) outside.

2. The bone marrow aspiration needle of claim 1, wherein: The adjusting structure comprises a driving rod (404) fixedly connected to the rotating end of the driving ring (403), a spring piece (405) is fixedly connected to the top of the driving rod (404), a plurality of clamping grooves (406) are arranged at equal intervals on the outer wall of one end of the mounting chamber (1), and the spring piece (405) is clamped in one of the clamping grooves (406).

3. The bone marrow aspiration needle of claim 1, wherein: The abutting assembly (5) comprises a threaded pipe (501) fixedly connected to the top of the circumferential outer wall of the needle cylinder (2), an installation sleeve (502) is threadedly connected to the outside of the threaded pipe (501), four abutting plates (503) are rotatably connected to the inside of the installation sleeve (502) at equal intervals, the four abutting plates (503) are in close contact with each other, four limiting strips (507) are fixedly connected to the inside of the installation sleeve (502) at equal intervals, the four limiting strips (507) correspond to the four abutting plates (503) at the ends in one-to-one correspondence, and the threaded pipe (501) is provided with a linkage structure.

4. The bone marrow aspiration needle of controlled sample volume of claim 3, wherein: The linkage structure comprises an installation ring (504) rotatably connected to the top of the circumferential outer wall of the threaded pipe (501), four thin steel wires (506) are fixedly connected to the outside of the installation ring (504) at equal intervals, one extension block (505) is fixedly connected to one side of each of the four abutting plates (503) which are away from each other, and the bottom end of each of the four thin steel wires (506) is fixedly connected with one of the four extension blocks (505).

5. The bone marrow aspiration needle of controlled sample volume of claim 3, wherein: One magnetic block is embedded in the inside of one side of each of the four abutting plates (503), and each of the four abutting plates (503) is made of stainless steel material.

6. The bone marrow aspiration needle of claim 1, wherein: A needle core (3) is slidably connected in the inlet at the top of the mounting chamber (1), and the needle core (3) extends into the inside of the extension pipe (401).

7. The bone marrow aspiration needle of claim 1, wherein: A handle is fixedly connected to the outer wall of each of the two sides of the mounting chamber (1), and two holding grooves are formed in the outer wall of the bottom of each of the two handles.

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