CN207575482U - A kind of injector for medical purpose for facilitating drawing liquid - Google Patents

Abstract

The utility model discloses a medical syringe which is convenient for drawing liquid, which comprises a drawing needle, a valve, a cylinder body and a piston part. The transition fit is inside the valve wall, the valve column is provided with a flow channel along the radial direction, the valve core is located on the valve column and linked with the valve column, the valve disc is located outside the valve wall and connected to the valve core, and the lever member Connected to the valve disc, the head end and the end of the valve wall are respectively provided with openings, the openings at the head end and the end of the valve wall are respectively connected to the extraction needle and the cylinder body, and the piston of the piston part is arranged in the cylinder body , the piston rod of the piston part is clamped outside the cylinder. The operator only needs to perform puncture and adjust the lever with one hand, and the liquid can be drawn out by using negative pressure vacuum, which will not cause muscle fatigue on the hand, so that the hand can hold and operate the syringe stably, which will bring great benefits to the operator. The convenience of use ensures the efficiency and effect of clinical liquid pumping operation.

Description

A medical syringe for convenient liquid extraction

technical field

The utility model relates to a vacuum-assisted liquid pumping syringe, in particular to a convenient liquid pumping medical syringe.

Background technique

Existing syringes are generally composed of syringes, pistons, connecting rods, and needles, which have a single structure and do not effectively liberate the operator's hands. When using existing syringes to extract liquids (for example: joint fluid, cyst fluid, abscess fluid, peritoneal effusion, etc.) Fatigue makes it difficult for the syringe to meet the negative pressure requirements for pumping liquid, making it difficult for the hand to hold and operate the syringe stably, which will bring inconvenience to the operator, affect the clinical operation effect, and even lead to operational errors.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art, and provide a medical syringe which is convenient for drawing liquid, and uses negative pressure vacuum to extract liquid.

The utility model is realized through the following technical solutions. The utility model includes an extraction needle, a valve, a cylinder body and a piston part. The transition fit is inside the valve wall, the valve column is provided with a flow channel along the radial direction, the valve core is located on the valve column and linked with the valve column, the valve disc is located outside the valve wall and connected to the valve core, and the driving rod Connected to the valve disc, the head end and the end of the valve wall are respectively provided with openings, the openings at the head end and the end of the valve wall are respectively connected to the extraction needle and the cylinder body, and the piston of the piston part is arranged in the cylinder body , the piston rod of the piston part is clamped outside the cylinder.

The lever member includes a first lever and a second lever, the first lever and the second lever are perpendicular to each other, and the first lever is parallel to the flow channel. When the first lever is moved to a direction parallel to the entire syringe, the conduction of the valve can be realized.

The valve column is a cylinder, and the size of the flow passage matches the openings at both ends of the valve wall.

The cylinder body includes a syringe and a handle, the top of the syringe communicates with the opening at the end of the valve wall, the handle is located at the bottom of the syringe, and scales are provided on the outer wall of the syringe.

The top of the piston rod is provided with a recessed ring, the bottom of the piston rod is provided with a handle, and the recessed ring holds the bottom of the syringe through a snap ring.

The outer diameter of the clasp is larger than the inner diameter of the syringe. Can be easily held.

The clamping ring is provided with a clamping hole for clamping the concave ring, and the edge of the clamping ring has a clamping door for clamping the concave ring. When not in use, the snap ring can be easily removed.

The extracting needle includes a needle, a needle seat and a connector, the needle and the needle seat are connected as a whole, the needle seat is clamped on the connector, and the connector communicates with the opening at the head end of the valve wall.

A method for using the medical syringe, comprising the following steps:

(1) Close the valve so that the extraction needle does not communicate with the cylinder body, extract the piston part in the cylinder body, and hold the piston part at the bottom of the cylinder body to form a negative pressure vacuum in the cylinder body;

(2) Open the valve so that the extraction needle is connected to the barrel, and the negative pressure will automatically extract the liquid from the extraction needle, and close the valve after reaching the set scale.

In the initial state, the valve can completely close the syringe, so that the needle and the syringe are not connected, and the syringe is in a complete vacuum state.

When using the syringe to draw liquid, the operator can move the lever to open the valve so that the needle and the syringe communicate. A vacuum can then draw the liquid through the needle and barrel into the barrel.

The operator can change the size of the opening of the valve by changing the position of the lever, thereby adjusting the speed and volume of suction. When the syringe has sucked in a required amount of liquid, it is only necessary to return the driving lever to stop the liquid sucking and seal the liquid in the syringe.

Remove the clasp, firstly push the piston rod forward to eliminate the vacuum state, then move the lever, and then push the piston rod forward, so that the liquid sucked by the syringe can be discharged.

Compared with the prior art, the utility model has the following advantages: the utility model can liberate the hands of medical operators during the clinical liquid pumping process. In the process of clinically extracting liquid, the operator only needs to puncture and adjust the lever with one hand, and the liquid can be drawn out by using negative pressure vacuum, which saves the operation of pulling the piston rod with one hand and will not cause hand injury. Muscle fatigue enables the hand to hold and operate the syringe stably, which will bring convenience to the operator, ensure the efficiency and effect of clinical pumping operations, and avoid operational errors due to muscle fatigue on the hands. At the same time, during the operation process, the utility model can ensure that the extracted liquid is well-sealed, not in contact with the outside world, not polluted, and can conveniently discharge the liquid for the next step of testing and processing. A large number of clinical applications will improve the work efficiency of doctors and nurses, free their hands, and then improve the operating efficiency of hospitals, improve patient satisfaction, and improve the relationship between doctors and patients.

Description of drawings

Fig. 1 is the structural representation when the utility model valve is opened;

Fig. 2 is a schematic cross-sectional structure diagram when the valve is opened;

Fig. 3 is a structural schematic diagram when the valve is closed;

Fig. 4 is a schematic cross-sectional structure diagram when the valve is closed;

Fig. 5 is a schematic diagram of the clasp structure.

Detailed ways

The following is a detailed description of the embodiments of the present utility model. This embodiment is implemented on the premise of the technical solution of the present utility model, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present utility model is not limited to the following the described embodiment.

Example 1

As shown in Figures 1 to 5, the present embodiment includes an extraction needle, a valve, a cylinder body 9 and a piston member, and the valve includes a valve column 15, a valve wall 14, a valve core 5, a valve disc 7 and a lever member; The spool 15 is transitionally fitted in the valve wall 14, and the spool 15 is provided with a flow channel 16 along the radial direction. The valve core 5 is connected to the outside, the lever member is connected to the valve disc 7, the head end and the end of the valve wall 14 are respectively provided with openings, and the openings at the head end and the end of the valve wall 14 are connected to the extraction needle and the end respectively. The cylinder body 9 , the piston 18 of the piston part is arranged inside the cylinder body 9 , and the piston rod 12 of the piston part is clamped outside the cylinder body 9 .

The lever member in this embodiment includes a first lever 3 and a second lever 4 , the first lever 3 and the second lever 4 are perpendicular to each other, and the first lever 3 is parallel to the circulation channel 16 . When the first lever 3 is moved to a direction parallel to the entire syringe, the conduction of the valve 8 can be realized. The spool 15 is a plastic cylinder, and the flow channel 16 matches the size of the openings at both ends of the valve wall 14 . The valve disc 7 can be rotated by 90°, as shown in Figure 1 and Figure 2, the operator uses his fingers to move the first lever 3 so that the first lever 3 points to the direction of the needle 1, and the valve disc 7 drives the valve column through the valve core 5 When 15 is rotated so that the flow channel 16 is parallel to the longitudinal axis of the syringe, the valve 8 is in the connected state, and the syringe 17 is in communication with the needle 1. As shown in Figures 3 and 4, the operator uses his fingers to move the second lever 4 so that the second lever 4 points to the opposite direction of the needle 1, and the valve disc 7 drives the valve column 15 to rotate through the valve core 5 to make the flow channel When 16 is perpendicular to the longitudinal axis of the syringe, the valve 8 is in a closed state; at this time, the syringe 17 is not connected to the needle 1.

The barrel 9 includes a syringe 17 and a handle 10 , the top of the syringe 17 communicates with the opening at the end of the valve wall 14 , the handle 10 is located at the bottom of the syringe 17 , and the outer wall of the syringe 17 is provided with scales. Syringe 17 is made of transparent plastics.

The top of the piston rod 12 is provided with a recessed ring 19 , the bottom of the piston rod 12 is provided with a handle 13 , and the recessed ring 19 holds the bottom of the syringe 17 through the snap ring 11 . The outer diameter of the snap ring 11 is larger than the inner diameter of the syringe 17 . Can be easily held. The clamping ring 11 is provided with a clamping hole 20 for clamping the concave ring 19 , and the edge of the clamping ring 11 has a clamping door 21 for clamping the concave ring 19 . When not in use, the snap ring 11 can be easily removed. The extraction needle includes a needle 1, a needle base 2 and a joint 6, the needle 1 and the needle base 2 are connected as one, the needle base 2 is clamped on the joint 6, and the joint 6 is connected to the opening at the head end of the valve wall 14 connected.

The initial state of the medical syringe is: the needle 1 is connected to the joint 6 through the needle seat 2; the second lever 4 points to the opposite direction of the needle 1, and the valve 8 is in a closed state; the inside of the syringe 17 is a negative pressure vacuum; the piston 18 and the piston rod 12 is fixed at the maximum capacity of the syringe 17 by the snap ring 11.

In this embodiment, when using the syringe to perform a large amount of liquid pumping operation, the operator will accurately insert the needle 1 into the operation site; the operator uses his fingers to move the first lever 3 forward by 90°, so that the first lever 3 points to In the needle 1 direction, the valve 8 is in a fully connected state, and the syringe 17 is in communication with the needle 1 at this time. At this point, the vacuum inside the barrel can draw the liquid into the barrel 17 via the needle 1 and the valve 8 . The operator does not need to pull the piston rod 12, but only needs to maintain and adjust the position of the entire syringe. After extracting the liquid, the operator uses his fingers to move the second lever 4 backward by 90°, so that the second lever 4 points to the opposite direction of the needle 1, and the valve 8 is in a closed state; at this time, the syringe 17 and the needle 1 is not connected, the liquid in the syringe 17 will be in a sealed state. Finally, the entire syringe can be pulled out from the operation site to complete a large amount of liquid suction operation.

Example 2

When using the syringe to perform a small amount of liquid extraction operation, the operator will accurately insert the syringe needle 1 into the operation site; Observe the speed and volume of liquid flowing into the syringe 17 to control the speed and range of operation, so that the first driving lever 3 gradually rotates towards the direction of the needle 1, and the valve 8 is in a partially connected state. At this time, the syringe 17 and Needle 1 is partially connected. At this time, the vacuum in the syringe 17 can slowly suck the liquid into the syringe 17 through the needle 1 and the valve 8 . The operator does not need to pull the piston rod 12 , but only needs to maintain and adjust the positions of the first driving rod 3 and the second driving rod 4 . The amount of extracted liquid can be known through the scale on the outer wall of the syringe 17; when the required amount of liquid is extracted, the operator uses his fingers to move the second lever 4 backward until the second lever 4 points to the needle 1 In the opposite direction, the valve 8 is in a closed state; at this time, the syringe 17 is not connected to the needle 1, and the liquid in the syringe 17 will be in a sealed state. Finally, the syringe can be pulled out from the operation site to complete a small amount of liquid suction operation.

Other implementations are the same as in Example 1.

Example 3

The liquid extracted as in Embodiment 1 or 2 is waste liquid, and the operator only needs to remove the needle 1 and the needle hub 2 from the joint 6 . The needle 1 and needle hub 2 are discarded in the sharps box, and the rest of the syringe is discarded in the medical waste container.

Other implementations are the same as in Example 1.

Example 4

The liquid extracted as in Embodiment 1 or 2 needs to be further processed. The operator first removes the snap ring 11 from the piston rod 12, and then pushes the piston rod 12 forward until the vacuum in the syringe 17 disappears completely. Then, move the first lever 3 forward by 90° with your fingers, so that the first lever 3 points to the direction of the needle 1, the valve 8 is in a fully connected state, and the needle cylinder 17 is in communication with the needle 1 at this time. At this time, the liquid can be discharged into the corresponding container through the valve 8 and the needle 1 by pushing the piston rod 12 forward. The needle 1 and needle hub 2 are discarded in the sharps box, and the rest of the syringe is discarded in the medical waste container.

Other implementations are the same as in Example 1.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (8)

1. A medical syringe for convenient liquid extraction, characterized in that it comprises an extraction needle, a valve, a cylindrical body and a piston part, and the valve comprises a valve post, a valve wall, a valve core, a valve disc and a driving rod part; The column is transitionally fitted in the valve wall, and the valve column is provided with a flow channel along the radial direction. The valve core is located on the valve column and is linked with the valve column. The valve disc is located outside the valve wall and connected to the valve core. The driving rod The head and end of the valve wall are respectively provided with openings, and the openings at the head and end of the valve wall are respectively connected to the extraction needle and the cylinder, and the piston of the piston is arranged on the cylinder. Inside the body, the piston rod of the piston part is clamped outside the cylinder. 2. A kind of medical syringe convenient for drawing liquid according to claim 1, characterized in that, said lever member comprises a first lever and a second lever, and said first lever and second lever are connected to each other. Vertically, the first driving rod is parallel to the circulation channel. 3 . The medical syringe for convenient liquid extraction according to claim 1 , wherein the valve column is a cylinder, and the size of the flow passage matches the openings at both ends of the valve wall. 4 . 4. A medical syringe that is convenient for drawing liquid according to claim 1, wherein the cylinder body includes a syringe and a handle, the top of the syringe communicates with the opening at the end of the valve wall, and the handle is located at the end of the syringe. The bottom of the syringe is provided with scales on the outer wall of the syringe. 5. A convenient medical syringe according to claim 4, characterized in that, the top of the piston rod is provided with a recessed ring, the bottom of the piston rod is provided with a handle, and the recessed ring is The ring snaps onto the bottom of the barrel. 6 . A medical syringe for convenient liquid suction according to claim 5 , wherein the outer diameter of the clasp is larger than the inner diameter of the syringe. 7 . 7. A medical syringe for convenient liquid extraction according to claim 5, characterized in that, the snap ring is provided with a snap hole for holding the concave ring, and the edge of the snap ring has a hole for snapping into the concave ring. Ring of Carmen. 8. A medical syringe for convenient liquid extraction according to claim 1, characterized in that, the extraction needle comprises a needle, a needle seat and a connector, the needle and the needle seat are connected as one, and the needle seat is clamped On the joint, said joint communicates with the opening at the head end of the valve wall.