CN216876434U - Negative pressure suction syringe for puncture - Google Patents

Abstract

The utility model provides a negative pressure suction injector for puncture, which comprises an injection needle, a needle cylinder, a core rod and a needle cap; the head end of the syringe is provided with a conical needle sleeve, the tail end of the injection needle is sleeved on the conical needle sleeve, and the injection needle is communicated with the inner cavity of the syringe; the tail end of the needle cylinder is provided with an outer sleeve curled edge part which protrudes outwards, and the needle cylinder is provided with a needle cylinder through hole at a position close to the outer sleeve curled edge part; the head end of the core rod is provided with a piston head which is positioned in the inner cavity of the needle cylinder; the core rod is provided with a plurality of core rod through holes at equal intervals along the length direction of the core rod; the needle cylinder through hole is matched with the core rod through hole; the needle cap is matched with the needle cylinder through hole and the core rod through hole for use; one of the core rod through holes is aligned with the needle cylinder through hole, and the needle cap passes through the core rod through hole and the needle cylinder through hole. The utility model can effectively help the clinician to improve the fine needle puncture efficiency, greatly reduce the interference of factors of assistant proficiency and adaptability, make the fine needle puncture suction operation more concise and convenient, effectively reduce the occurrence of puncture complications and improve the puncture accuracy.

Description

Negative pressure suction syringe for puncture

technical field

The utility model relates to a syringe, in particular to a negative pressure suction syringe for puncture.

Background technique

With the development of evidence-based medicine, fine needle aspiration biopsy is more and more popular in clinical practice. The diagnosis of many diseases can be made definitively by a small fine needle aspiration. For most solid tumors, fine needle aspiration requires not only repeated lifting, insertion and rotation, but also a certain amount of negative pressure suction to ensure that enough cells can be obtained to meet the needs of cytological diagnosis in the pathology department. At present, the commonly used method of negative pressure suction in clinical practice is to connect a syringe to the end of the puncture needle. While the operating doctor is performing puncture, the assistant is responsible for pulling the syringe to a certain negative pressure capacity, and synchronizing with the operating doctor to lift, insert and rotate.

The current clinical method is to connect a syringe to the end of the puncture needle. While the operating doctor is performing puncture, the assistant is responsible for pulling the syringe to a certain negative pressure capacity, and synchronizing with the operating doctor to lift, insert and rotate. Such an operation requires a very high degree of tacit understanding between the assistant and the operating doctor. Otherwise, due to the uncoordinated movements of the two, the lifting and rotating force of the puncture needle will be insufficient, and sufficient cells cannot be obtained, and it may even lead to the puncture needle. The puncture needle is detached from the syringe, or the puncture needle damages the surrounding vital organs due to accidental force.

Therefore, there is a need for improvements to the prior art.

Utility model content

The purpose of this utility model is to overcome the shortcoming of the existing syringe in the process of fine needle puncture negative pressure suction, requiring an assistant to pull the core rod of the syringe in real time to ensure a certain negative pressure attraction, without adding any additional device. , to provide a syringe that can be completed by the operating doctor alone and has a fixed negative pressure attraction during fine needle puncture negative pressure suction.

In order to solve the above technical problems, the utility model provides a negative pressure suction syringe for puncture, including an injection needle, a syringe barrel, a core rod and a needle cap;

The first end of the syringe is provided with a conical needle sleeve, the tail end of the injection needle is sleeved on the conical needle sleeve, and the injection needle and the inner cavity of the syringe are communicated with each other;

The tail end of the needle cylinder is provided with an outer sleeve curling part that protrudes outward, and the needle cylinder is provided with a needle cylinder through hole at a position close to the outer sleeve curling part;

The head end of the core rod is provided with a piston head, and the piston head is located in the inner cavity of the syringe;

The core rod is provided with a number of core rod through holes equidistantly along its length direction;

The through hole of the barrel is matched with the through hole of the core rod;

The needle cap is used in cooperation with the through hole of the needle cylinder and the through hole of the core rod; one of the through hole of the core rod is aligned with the through hole of the needle cylinder, and the needle cap passes through the through hole of the core rod and the through hole of the needle cylinder.

As an improvement to the negative pressure suction syringe for puncture of the present utility model:

A pull ring is arranged on the side wall of the needle cap.

As an improvement to the negative pressure suction syringe for puncture of the present utility model:

The diameters of the needle cap, the through hole of the needle cylinder and the core rod are the same.

As an improvement to the negative pressure suction syringe for puncture of the present utility model:

The tail end of the needle cap is provided with a baffle ring protruding outward, and the diameter of the baffle ring is larger than that of the needle cap.

As an improvement to the negative pressure suction syringe for puncture of the present utility model:

The core rod is provided with a gap near the head end.

As an improvement to the negative pressure suction syringe for puncture of the present utility model:

The end of the core rod is provided with a handle.

The technical advantages of the negative pressure suction syringe for puncture of the present utility model are:

The utility model can effectively help clinicians to improve the efficiency of fine-needle puncture, greatly reduce the interference of assistants' proficiency and cooperation, and make the suction operation of fine-needle puncture more concise and convenient. Early diagnosis and early treatment of the disease can help, and at the same time, it can effectively reduce the occurrence of puncture complications and improve the accuracy of puncture.

The syringe of the utility model is a one-time-use syringe. Compared with the ordinary one-time-use syringe, no device is added, the production cost is low, the syringe can be widely used, and the clinician is greatly convenient. At the same time, the syringe retains all the functions of ordinary disposable syringes.

Description of drawings

The specific embodiments of the present utility model will be further described in detail below with reference to the accompanying drawings.

Fig. 1 is the structural representation of the negative pressure suction syringe for puncture of the present invention;

FIG. 2 is an exploded view of FIG. 1 .

Detailed ways

The present utility model will be further described below with reference to specific embodiments, but the protection scope of the present utility model is not limited thereto.

Example 1. A negative pressure suction syringe for puncture, as shown in Figures 1-2, includes an injection needle 1, a syringe barrel 2, a core rod 3 and a needle cap 4.

The injection needle 1 is a hollow needle body;

The head end of the syringe 2 is provided with a conical needle sleeve 21, the tail end of the injection needle 1 is sleeved on the conical needle sleeve 21 so as to be fixedly connected with the head end of the syringe 2, and the injection needle 1 and the inner cavity of the syringe 2 communicate with each other;

The end of the needle cylinder 2 is provided with an outer sleeve curling portion 22 that protrudes outward, and the needle cylinder 2 is provided with a needle penetrating the side wall of the needle cylinder 2 at a position close to the outer casing curling portion 22 (that is, close to the tail end of the needle cylinder 2). barrel through hole 23;

The first end of the core rod 3 is provided with a piston head 31, and the piston head 31 is located in the inner cavity of the syringe 2; the tail end of the core rod 3 is provided with a handle 32, which is convenient for the user to push and pull the core rod 3;

The core rod 3 is provided with a number of core rod through holes 33 equidistantly along its length direction;

The through-hole 23 of the barrel and the through-hole 33 of the core rod are matched, and both have the same diameter;

The needle cap 4 is used in conjunction with the through hole 23 of the needle barrel and the through hole 33 of the core rod. The diameter of the needle cap 4 is the same as that of the through hole 23 of the needle cylinder and the through hole of the core rod 3, and one of the through hole 33 of the core rod is aligned with the through hole 23 of the needle cylinder. Then, pass the head end of the needle cap 4 through the core rod through hole 33 and the needle cylinder through hole 23, so that the relative position of the needle cylinder 2 and the core rod 3 can be fixed, so that the suction volume of the needle cylinder 2 is always maintained at a certain a fixed level.

The core rod 3 is provided with a notch 34 at a position close to the head end (ie, close to the piston head 31 );

The tail end of the needle cap 4 is provided with a baffle ring 41 that protrudes outward. The diameter of the baffle ring 41 is slightly larger than the diameter of the needle cap 4. The baffle ring 41 can prevent the needle cap 4 from being inserted into the core rod through hole 33 and the needle barrel through hole 23 too much. A pull ring 42 is provided on the side wall of the needle cap 4, and the user can pull the needle cap 4 through the pull ring 42.

The use method of this utility model is:

In the process of fine needle puncture, after the operating doctor places the injection needle 1 in place, the assistant connects the syringe barrel 2 of the present invention with the injection needle 1 tightly. The assistant pulls the syringe core rod 3 to a certain volume according to actual needs, and one of the core rod through holes 33 is aligned with the syringe through hole 23; then insert the needle cap 4 with the pull ring 42 into the core rod through hole 33 In the through hole 23 of the needle cylinder, the relative positions of the needle cylinder 2 and the core rod 3 are fixed, so that the suction volume of the needle cylinder 2 is always maintained at a certain fixed level.

After the assistant is fixed, the operating doctor can lift, insert, and rotate the lesion in multiple directions, multiple angles, and freely without being affected. After the puncture is completed, the assistant pulls the pull ring 42 on the needle cap 4 with his fingers, pulls out the needle cap 4, resets the core rod 3, and the negative pressure in the syringe 2 disappears immediately. The smear is fixed.

The injection needle 1 adopts a 7-gauge needle (0.7mm, black), and the utility model can be directly used for puncture and suction in the absence of a special puncture needle or in an emergency.

Finally, it should also be noted that the above list is only a few specific embodiments of the present invention. Obviously, the present invention is not limited to the above embodiments, and many modifications are possible. All deformations that those of ordinary skill in the art can directly derive or associate from the disclosure of the present invention should be considered as the protection scope of the present invention.

Claims (6)

1. a negative pressure suction syringe for puncture, characterized in that: it comprises an injection needle (1), a syringe (2), a core rod (3) and a needle cap (4); The head end of the syringe (2) is provided with a conical needle sleeve (21), the tail end of the injection needle (1) is sleeved on the conical needle sleeve (21), and the injection needle (1) is inside the syringe (2) The cavities communicate with each other; The tail end of the needle cylinder (2) is provided with an outer sleeve curling portion (22) that protrudes outward, and the needle cylinder (2) is provided with a needle cylinder through hole (23) at a position close to the outer outer curling portion (22); The head end of the core rod (3) is provided with a piston head (31), and the piston head (31) is located in the inner cavity of the needle cylinder (2); The core rod (3) is provided with a number of core rod through holes (33) equidistantly along its length direction; The barrel through hole (23) is matched with the core rod through hole (33); The needle cap (4) is used in cooperation with the through hole (23) of the needle cylinder and the through hole (33) of the core rod; one of the through hole (33) of the core rod is aligned with the through hole (23) of the needle cylinder, and the needle cap (4) Pass through the core rod through hole (33) and the needle cylinder through hole (23). 2. The negative pressure suction syringe for puncturing according to claim 1, wherein: A pull ring (42) is provided on the side wall of the needle cap (4). 3. The negative pressure suction syringe for puncturing according to claim 2, wherein: The diameters of the needle cap (4), the through hole (23) of the needle cylinder and the core rod (3) are the same. 4. The negative pressure suction syringe for puncturing according to claim 3, wherein: The rear end of the needle cap (4) is provided with a baffle ring (41) protruding outward, and the diameter of the baffle ring (41) is larger than the diameter of the needle cap (4). 5. The negative pressure suction syringe for puncturing according to claim 4, wherein: The core rod (3) is provided with a gap (34) at a position close to the head end. 6. The negative pressure suction syringe for puncturing according to claim 5, wherein: A handle (32) is provided at the tail end of the core rod (3).

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