Syringe for bone marrow puncture

Abstract

The utility model relates to the technical field of bone marrow puncture, in particular to an injector for bone marrow puncture, which comprises an injector body. The injector body comprises a needle tube, an end seat sleeving the upper end of the needle tube, a push rod movably arranged in the middle of the end seat, a piston fixed to the lower end of the push rod, a connecting rod arranged at the round head of the upper end of the push rod, a main finger ring fixed to the upper end of the connecting rod, an auxiliary finger ring fixed to the side face of the end seat and a needle integrally arranged at the lower end of the needle tube. The needle point seat is connected with the needle head, the needle point body is arranged at the lower end of the needle point seat in an embedded mode, a positioning ring is integrally fixed to the upper end of the needle point seat, a protruding ring is integrally arranged on the peripheral side of the positioning ring, and the protruding ring is matched with a groove in the inner wall of the needle head. According to the utility model, the main finger ring and the auxiliary finger ring are arranged to replace the edge and handle structure of a traditional injector, so that fingers of a doctor can be conveniently fixed and are not easy to slip off, and the bone marrow puncture extraction process is more stable.

Description

Technical Field

[0001] The utility model relates to the technical field of bone marrow puncture, in particular to a syringe for bone marrow puncture. Background Art

[0002] Bone marrow puncture is a common diagnostic technique for taking bone marrow fluid, and its examination contents include cytology, protozoa and bacteriology. It is suitable for the diagnosis, differential diagnosis and treatment follow-up of various blood diseases; unexplained increase or decrease in the number of red blood cells, white blood cells and platelets and morphological abnormalities; diagnosis and differential diagnosis of unexplained fever, bone marrow culture, bone marrow smear to find parasites, etc.

[0003] The existing open patent (publication number CN 212521841 U) discloses a syringe for bone marrow puncture, including a syringe, a mounting tube is provided on the outer wall of one end of the syringe, a needle is sleeved on the outer wall of the mounting tube, a needle tube is sleeved on the outer wall of one end of the needle, mounting ports are provided on both outer walls of the needle, and limiting mechanisms are provided on the inner walls of the two mounting ports, the limiting mechanisms include sleeves, and the sleeves are sleeved on the inner walls of the mounting ports, sliding grooves are provided on both inner walls of the sleeves, and the inner walls of the two sliding grooves are slidably connected with the same sliding rod, an arc-shaped clamp is fixed to the outer wall of one end of the sliding rod by bolts, a spring is sleeved on the outer wall of the sliding rod, and a sealing ring is provided on the inner wall of the sleeve. The utility model avoids the problem of the needle falling off by matching the clamp in the limiting mechanism with the limiting groove on the mounting tube, and by arranging fixing rings on both sides of the needle, it is convenient to take the needle and to disassemble and assemble the needle.

[0004] However, the main structure of the above-mentioned syringe is similar to the currently commonly used syringes, and the edge of the needle tube and the doctor's hand-held structure set at the end of the push rod are both flat structures, which makes it inconvenient for the doctor to exert force during the extraction process. Therefore, the utility model proposes a syringe for bone marrow puncture to improve the above-mentioned problem. Utility Model Content

[0005] The utility model aims to provide a syringe for bone marrow puncture, so as to solve the problem in the background art that the force generating structure in the existing syringe is relatively flat, which makes it inconvenient for doctors to extract bone marrow fluid.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a syringe for bone marrow puncture, comprising a syringe body; the syringe body comprises a needle tube, an end seat sleeved on the upper end of the needle tube, a push rod movably arranged in the middle of the end seat, a piston fixed to the lower end of the push rod, a connecting rod arranged at the round head of the upper end of the push rod, a main finger ring fixed to the upper end of the connecting rod, a secondary finger ring fixed to the side of the end seat, a needle head integrally arranged at the lower end of the needle tube, a needle tip seat connected to the needle head, and a needle tip body embedded in the lower end of the needle tip seat.

[0007] Preferably, the secondary finger rings are symmetrically arranged about the center line of the end seat, and notches are arranged on the circumferential sides of the secondary finger rings.

[0008] Preferably, transparent observation windows are symmetrically arranged on the side of the needle tube, and scale bars are arranged on the edges of the transparent observation windows.

[0009] Preferably, the piston is lifted and lowered inside the needle tube, and the peripheral side of the piston is pressed against the inner wall of the needle tube.

[0010] Preferably, a positioning ring is integrally fixed to the upper end of the needle tip seat, and a raised ring is integrally provided on the circumference of the positioning ring, and the raised ring cooperates with the groove on the inner wall of the needle head.

[0011] Preferably, the needle tip seat is arranged in a stepped shape, and the needle tip seat is communicated with the interior of the needle tube.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model replaces the traditional syringe edge and handle structure with a main finger ring and a secondary finger ring, which is convenient for fixing the doctor's fingers and is not easy to slip, making the bone marrow puncture and extraction process more stable. When in use, the doctor buckles the thumb in the main finger ring, buckles the index finger and the middle finger in the secondary finger ring, and lifts the thumb upward to drive the main finger ring to move. At this time, the connecting rod fixed to the main finger ring drives the push rod and the piston to move along the needle tube direction to achieve the extraction of bone marrow fluid. With appropriate force, the suction is carried out slowly, and a small amount of red bone marrow fluid can be seen entering the syringe. The amount of bone marrow fluid suction is preferably 0.1-0.2ml. The syringe is removed, and the bone marrow fluid is pushed onto a glass slide. The assistant quickly makes 5-6 smears, which are sent for cell morphology and cell chemical staining examinations. The connecting rod is threadedly connected to the round head at the upper end of the push rod, which is convenient for replacing different types of handle structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a front view schematic diagram of the overall structure of the utility model;

[0016] Figure 3 It is a schematic diagram of the needle tip seat structure in the utility model.

[0017] In the figure: 1, needle tube; 2, end seat; 3, connecting rod; 4, main finger ring; 5, auxiliary finger ring; 6, piston; 7, needle; 8, needle tip seat; 9, needle tip body; 10, push rod; 11, positioning ring; 12, raised ring. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the implementation regulations described are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0019] See also Figure 1-3 , as shown in the figure: This embodiment is a preferred implementation of the technical solution, a syringe for bone marrow puncture, including a syringe body; the syringe body includes a needle tube 1, an end seat 2 sleeved on the upper end of the needle tube 1, a push rod 10 movably arranged in the middle of the end seat 2, a piston 6 fixed to the lower end of the push rod 10, a connecting rod 3 arranged at the round head of the upper end of the push rod 10, a main finger ring 4 fixed to the upper end of the connecting rod 3, a secondary finger ring 5 fixed to the side of the end seat 2, a needle 7 integrally arranged at the lower end of the needle tube 1, a needle tip seat 8 connected to the needle 7, and a needle tip body 9 embedded in the lower end of the needle tip seat 8;

[0020] It should be noted that: in the bone marrow puncture syringe involved in the present application, a main finger ring 4 and a secondary finger ring 5 are provided to replace the traditional syringe edge and handle structure, so that the doctor's fingers are conveniently fixed and not easy to slip, making the bone marrow puncture extraction process more stable. In specific use, the doctor buckles his thumb in the main finger ring 4, and buckles his index finger and middle finger in the secondary finger ring 5. By lifting the thumb upward, the main finger ring 4 is driven to move. At this time, the connecting rod 3 fixed to the main finger ring 4 drives the push rod 10 and the piston 6 to move along the direction of the needle tube 1 to achieve the extraction of bone marrow fluid. Slowly aspirate with appropriate force, and a small amount of red bone marrow fluid can be seen entering the syringe. The amount of bone marrow fluid aspirated is preferably 0.1-0.2 ml. Remove the syringe, push the bone marrow fluid onto a glass slide, and the assistant quickly makes 5-6 smears, which are sent for cell morphology and cytochemical staining examinations. The connecting rod 3 is threadedly connected to the round head at the upper end of the push rod 10, which is convenient for replacing different types of handle structures.

[0021] Among them Figure 1 As shown, the secondary finger ring 5 is symmetrically arranged about the center line of the end seat 2, and a notch is arranged on the peripheral side of the secondary finger ring 5;

[0022] It should be noted that the secondary finger ring 5 is generally used for buckling between the doctor's index finger and middle finger. To facilitate the buckling between the index finger and the middle finger, the secondary finger ring 5 needs to be symmetrical about the midline of the end seat 2. The notches arranged on the side of the secondary finger ring 5 are used to accommodate fingers of different thicknesses.

[0023] Among them Figure 2 As shown, the side of the needle tube 1 is symmetrically provided with a transparent observation window, and the edge of the transparent observation window is provided with a scale bar; the piston 6 is lifted and set inside the needle tube 1, and the peripheral side of the piston 6 is pressed against the inner wall of the needle tube 1;

[0024] It should be noted that the transparent observation window is used to observe the height of the medium inside the needle tube 1, and the scale bar is used to accurately feedback the change in medium capacity. The piston 6 moves up and down along the inner wall of the needle tube 1 under the action of the push rod 10.

[0025] Among them Figure 3 As shown, a positioning ring 11 is integrally fixed to the upper end of the needle tip seat 8, and a raised ring 12 is integrally provided on the circumference of the positioning ring 11, and the raised ring 12 cooperates with the groove on the inner wall of the needle head 7; the needle tip seat 8 is arranged in a stepped shape, and the needle tip seat 8 is communicated with the inside of the needle tube 1;

[0026] It should be noted that the positioning ring 11 is used to connect the needle tip seat 8 and the needle 7. As the positioning ring 11 gradually enters the interior of the needle 7, until the raised ring 12 is fully matched with the annular groove on the inner wall of the needle 7, the positioning ring 11 and the needle 7 are limited, and then the needle tip seat 8 and the needle 7 are limited. The needle tip seat 8 arranged in a stepped shape has high stability and is not easy to break.

[0027] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0028] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A syringe for bone marrow puncture, comprising a syringe body; characterized in that: The syringe body comprises a needle tube (1), an end seat (2) sleeved on the upper end of the needle tube (1), a push rod (10) movably arranged in the middle of the end seat (2), a piston (6) fixed to the lower end of the push rod (10), a connecting rod (3) arranged at the round head of the upper end of the push rod (10), a main finger ring (4) fixed to the upper end of the connecting rod (3), a secondary finger ring (5) fixed to the side of the end seat (2), a needle head (7) integrally arranged at the lower end of the needle tube (1), a needle tip seat (8) connected to the needle head (7), and a needle tip body (9) embedded in the lower end of the needle tip seat (8).

2. A bone marrow puncture syringe according to claim 1, characterized in that: The secondary finger rings (5) are symmetrically arranged with respect to the midline of the end seat (2), and a notch is arranged on the circumference of the secondary finger rings (5).

3. A syringe for bone marrow puncture according to claim 1, characterized in that: The side of the needle tube (1) is symmetrically provided with a transparent observation window, and the edge of the transparent observation window is provided with a scale bar.

4. A syringe for bone marrow puncture according to claim 1, characterized in that: The piston (6) is arranged inside the needle tube (1) in a lifting manner, and the peripheral side of the piston (6) is pressed against the inner wall of the needle tube (1).

5. A bone marrow puncture syringe according to claim 1, characterized in that: A positioning ring (11) is integrally fixed to the upper end of the needle tip seat (8), and a raised ring (12) is integrally provided on the circumference of the positioning ring (11), wherein the raised ring (12) cooperates with a groove on the inner wall of the needle head (7).

6. A syringe for bone marrow puncture according to claim 1, characterized in that: The needle tip seat (8) is arranged in a stepped shape, and the needle tip seat (8) is communicated with the interior of the needle tube (1).

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