CN201578256U - Controllable Negative Pressure Syringe - Google Patents

Abstract

The utility model relates to a medical instrument, in particular to a syringe capable of continuously supplying negative pressure. A pair of semicircular baffles is added to the tail portion of a cylinder, and three short rods are added on a piston handle and are positioned on different horizontal planes but mutually parallel. Before a needle pricks skin of a patient to reach a vein, a user can pull out the piston handle to rotate a certain angle, then the short rods can be clamped onto the semicircular baffles, the front end of the cylinder can generate continuous negative pressure, and the different short rods clamped onto the semicircular baffles can generate different negative pressures. When drawing arterial blood, a doctor can use the cylinder to generate continuous negative pressure via simple operations, and the doctor can focus on searching artery, thereby reducing labor consumption of the doctor, and reducing pricks of the needle to the patient.

Description

Controllable Negative Pressure Syringe

technical field

The utility model relates to a medical device, in particular to a syringe which can continuously provide negative pressure.

Background technique

When drawing arterial blood with a traditional syringe, the doctor not only needs to use the needle to explore the position of the artery, but also continuously draws out the plunger of the syringe to maintain a certain negative pressure inside. Unnecessary suffering for the patient.

Contents of the invention

The main problem to be solved by the utility model is to overcome the deficiency that ordinary syringes cannot maintain a certain negative pressure inside, and provide a syringe that can control self-generated negative pressure, thereby reducing the physical exertion of doctors and reducing the needless pressure of patients. pain of.

The technical scheme of the utility model is that a pair of baffles are symmetrically arranged at the tail of the syringe. The sticks are on different horizontal planes along the radial direction of the cylinder, and the three short sticks are on the same plane and parallel to each other along the axial direction of the cylinder. The distance between the baffles < the length of the short stick < the diameter of the syringe. When the needle is inserted into the patient's skin and does not reach the blood vessel, the piston handle can be pulled out and then rotated at a certain angle. The short stick can be stuck on the baffle, and the front end of the syringe can generate continuous negative pressure, and different short sticks can be used to stick in the semicircle. Different sizes of negative pressures can be generated on the shaped baffle. After drawing blood, insert the needle into the rubber block in time to prevent blood from contacting with air.

The beneficial effect of the utility model is that when the doctor uses the utility model to extract arterial blood, the syringe can generate continuous negative pressure through the above-mentioned simple operation, and the doctor only needs to concentrate on finding the artery. Reduce the physical exertion of doctors, and at the same time, the number of needle injections for patients is correspondingly reduced.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is the figure when the utility model is not in use.

Fig. 2 is a top view of section A-A in Fig. 1 .

Fig. 3 is a figure when the utility model is used.

Fig. 4 is a top view of section B-B in Fig. 3 .

In the figure, 1. Baffle, 2. Short stick A, 3. Short stick B, 4. Short stick C, 5. Piston, 6. Negative pressure zone, 7. Rubber block, 8. Piston handle, 9. Syringe .

Detailed ways

In Fig. 1, a pair of symmetrical baffles (1) are added to the tail of the syringe (9) and fixed to the syringe, the piston handle (8) is cylindrical, and a ) of the short stick A (2), short stick B (3), short stick C (4), the short stick A (2), short stick B (3), short stick C (4) and the piston handle (8 ) as a whole, the three short sticks are equal in length and parallel to each other, the distance between the baffles < the length of short stick A (2), short stick B (3) or short stick C (4) < the length of the needle cylinder (9) Inner diameter, piston handle (8) diameter is less than the length of short stick A (2), short stick B (3), short stick C (4), and the needle is pricked on the rubber block (7).

In Figure 3, the needle is stuck on the rubber block (7), the piston handle (8) and the short stick A (2) are pulled out of the needle cylinder (9) upwards, rotated at a certain angle, and the short stick A (2) is stuck in the stopper. As shown in Fig. 4 on the plate (1), negative pressure is formed in the negative pressure zone (6) zone at this moment.

Taking arterial blood extraction with a controllable negative pressure syringe as an example, after inserting the needle tip under the skin and not reaching the blood vessel, pull up the piston handle (8), when the height of the short stick A (2) exceeds the plane where the baffle (1) is located , rotate a certain angle, as shown in Figure (3) and Figure (4), the short A (2) is stuck on the baffle (1), the piston (5) is locked, and the negative pressure area (6) forms a negative pressure. Continue to insert the needle tip to explore the location of the artery. When the needle tip penetrates the artery, blood will be drawn into the needle tube. Easy to complete the extraction of arterial blood. After drawing blood, insert the needle into the rubber block (7) in time to prevent contact with air.

According to the actual situation of use, the short stick B (3) or C (4) can be stuck on the baffle to provide negative pressure of different sizes.

Claims (4)

1. A controllable negative pressure syringe, comprising a needle, a syringe (9), a piston (5), and a piston handle (8), characterized in that a pair of symmetrical baffles (1 ) and fixed on the syringe, the short stick A (2), short stick B (3) and short stick C (4) perpendicular to the piston handle (8) are arranged on the piston handle (8), and the short stick A (2 ), short stick B (3), short stick C (4) and the piston handle (8) are integrated, the three short sticks are equal in length and parallel to each other, and the distance between the baffles is less than short stick A (2), short stick The length of B (3) or short stick C (4)＜the inner diameter of syringe (9). 2. The controllable negative pressure injector according to claim 1, further comprising a rubber block (7) on which the needle is stuck. 3. The controllable negative pressure injector according to claim 1 or 2, characterized in that one side of the baffle (1) is a straight line, and the other side is an arc with the same diameter as the syringe. 4. The controllable negative pressure injector according to claim 1 or 2, characterized in that the piston handle (8) is cylindrical.

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