A dual chamber anesthetic syringe

Abstract

The application discloses a double-cavity type anesthesia back-pulling injector, which comprises an injection cylinder, a piston located in the injection cylinder, a push rod connected with the piston and a push handle arranged at the end of the push rod. The injection cylinder is arranged in parallel left and right, and the upper end of the injection cylinder is provided with a sealing cover through which the push rod passes, a guide hole corresponding to the push rod and a sealing ring. The piston divides the injection cylinder into upper sealed balance cavities and lower injection cavities, and the balance cavities are communicated with each other, so that one side push rod is injected, and the other side push rod is lifted, thereby realizing back-pulling of the other side through single hand injection. It is equivalent to traditional back-pulling by two hands, and here, only single hand injection is needed. Two injection cylinders are used to extract anesthetic on the left side, and the bottom of the right side is kept open to balance with the external air pressure.

Description

Technical Field

[0001] This invention relates to the field of single-handed aspiration in anesthesia, specifically a dual-chamber aspiration syringe for anesthesia. Background Technology

[0002] During anesthesia injection, the ultrasound probe is held in one hand while the anesthetic is injected with the other. Injection and aspiration must be performed with one hand, but existing equipment often relies on bimanual coordination. This is particularly challenging for female doctors, whose hands are typically smaller. Since anesthetic doses are usually larger than 30ml, holding the probe with one hand and aspirating with the other makes the procedure difficult, leading to inefficient aspiration, misjudgment of intravascular location, increased puncture risks, and patient discomfort. Therefore, finding a convenient method for one-handed anesthesia and aspiration is a pressing issue for professionals in this field. Summary of the Invention

[0003] The purpose of this invention is to provide a dual-chamber aspiration syringe for anesthesia to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a dual-chamber aspiration syringe for anesthesia, comprising a syringe barrel, a piston located inside the syringe barrel, a push rod connected to the piston, and a push handle disposed at the end of the push rod;

[0005] The syringes are arranged in two parallel sections, with a sealing cap at the top for the plunger to pass through. Each syringe has a guide hole and a sealing ring corresponding to the plunger. The piston divides the syringe into an upper sealed balance chamber and a lower injection chamber, which are connected. This allows the plunger on one side to be pushed while the plunger on the other side rises, enabling single-handed injection and subsequent aspiration. This is equivalent to the traditional method of aspiration requiring two hands, where only one hand is needed for injection. The left syringe draws the anesthetic, while the right syringe maintains its bottom opening in equilibrium with the external air pressure.

[0006] Preferably, the balance chambers are connected by a rigid connecting tube, which is fixed between the two syringes. The connecting tube secures the two syringes, enhancing overall structural stability and facilitating one-handed operation by medical personnel.

[0007] Preferably, the connecting pipe is provided with a pull ring for easy application of force. The pull ring facilitates the application of force and prevents slippage. It can be made of latex material for greater softness and comfort.

[0008] Preferably, the two syringes are connected by a connecting post located on the lower side to increase the fixing strength and increase the stability of the syringes.

[0009] Preferably, the push handle is an arc-shaped plate and is inclined to facilitate inward tilting of force. This prevents it from slipping outwards during injection.

[0010] Preferably, the push rod is cylindrical. This makes sealing easier.

[0011] Preferably, the push rod is an arc-shaped plate with an outward-facing arc opening. The two push rods are connected by a transmission mechanism to allow them to move in opposite directions. The plate-shaped push rod is used to increase the contact area.

[0012] Preferably, the transmission mechanism includes a roller disposed between two push rods, and the roller is mounted on a connecting pipe via a central pivot. The central part of the roller is arc-shaped and conforms to the push rod. A latex pad layer to increase friction can be provided on the roller surface. The roller and the arc-shaped surface of the push rod are in close contact, ensuring smooth and unbiased force transmission. Pressing down on one side moves the other side up. Simultaneously, the thumb can press the push handle on the anesthesia syringe, while the index finger hooks onto the push handle of the aspirator syringe, forming a coordinated "press and hook" action, making single-handed operation more precise, effortless, and less prone to slippage. When aspiration is required, the operation is reversed: the thumb presses the push handle on the aspiration syringe, while the index finger hooks onto the push handle of the anesthesia syringe.

[0013] Preferably, the two push handles extend outwards from the push rod, making it convenient to press down on one side and lock up on the other side. The upper and lower ends of the push handles are provided with anti-slip grooves to prevent slipping.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. This application features two syringes, one for anesthesia injection and the other for aspiration. The upper chambers are connected by a connecting tube to synchronize the pressure of the two chambers. When the anesthesia injection syringe is used to inject anesthesia, the pressure in the upper sealed chamber decreases, and the pressure in the sealed chamber of the aspiration syringe also decreases. This causes the piston in the aspiration syringe to move upward and the push rod to move outward. When aspiration is needed, squeezing the push rod on the aspiration syringe causes the pressure in the sealed chamber of the aspiration syringe to decrease, and the pressure in the sealed chamber of the anesthesia injection syringe also decreases. This causes the piston in the anesthesia injection syringe to move upward, thus achieving aspiration. Therefore, aspiration is achieved by squeezing the push rod, which is equivalent to the fact that the pull-out syringe in the market requires two hands, but here it can be done with one hand.

[0016] 2. When the push handle is plate-shaped, it is connected by rollers. When the push rod in the anesthesia syringe moves downward, the other side moves upward under the drive of the rollers. The pushing force is converted into an outward pulling force, which is more labor-saving and assists in pulling the push rod in the syringe on the back side outward. At the same time, combined with the negative pressure of the sealed cavity for external pulling, the two combined significantly improve the pulling efficiency and operational stability. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the first embodiment of the present invention;

[0018] Figure 2This is an axonometric view of the first embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the structure of the second embodiment of the present invention;

[0020] Figure 4 This is an isometric view of the second embodiment of the present invention.

[0021] In the diagram: 1. Injector; 2. Piston; 3. Push rod; 4. Push handle; 5. Sealing cap; 6. Connecting tube; 7. Pull ring; 8. Connecting post; 9. Roller; 10. Shaft. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Example 1

[0024] Please see Figures 1 to 2 The present invention provides a technical solution for a dual-chamber anesthesia aspiration syringe: a dual-chamber anesthesia aspiration syringe includes a syringe 1, a piston 2 located inside the syringe 1, a push rod 3 connected to the piston 2, and a push handle 4 disposed at the end of the push rod 3;

[0025] Two syringes 1 are arranged parallel to each other, and the upper end of each syringe 1 is equipped with a sealing cap 5 for the push rod 3 to pass through. A guide hole and sealing ring corresponding to the push rod 3 are provided. The piston 2 divides the syringe 1 into an upper sealed balance chamber and a lower injection chamber, and the two balance chambers are connected. This allows the push rod 3 on one side to be pushed while the push rod 3 on the other side rises, thus enabling single-handed injection and aspiration on the other side. This is equivalent to the traditional method of aspiration requiring two hands, where only one hand is needed for injection. The left syringe 1 draws in the anesthetic, while the bottom opening on the right side remains balanced with the external air pressure.

[0026] The balancing chambers are connected by a rigid connecting tube 6, which is fixed between the two syringes 1. The connecting tube 6 secures the two syringes 1, enhancing overall structural stability and facilitating one-handed operation by medical personnel. A pull ring 7 is provided on the connecting tube 6 for easy application of force. The pull ring 7 facilitates force application and prevents slippage. It can be made of latex material for greater softness and comfort. The two syringes 1 are connected by a connecting post 8 located on the lower side to increase the fixing strength and enhance the stability of the syringes 1.

[0027] In addition, the pull ring 7 can be an air-filled ring with its inner cavity connected to the inner cavity of the connecting tube 6. It is softer and more comfortable. When the injection force is large, the pull ring 7 is harder, making it easier to apply force. When the injection force is small, it is softer, thus changing its softness and hardness according to the size of the injection force.

[0028] The push handle 4 is an arc-shaped plate with an angled design to facilitate inward tilting of force. It prevents slippage during injection. The push rod 3 is cylindrical, making sealing easier.

[0029] Example 2

[0030] like Figures 3 to 4 A dual-chamber aspiration syringe for anesthesia includes a syringe barrel 1, a piston 2 located inside the syringe barrel 1, a push rod 3 connected to the piston 2, and a push handle 4 located at the end of the push rod 3.

[0031] Two syringes 1 are arranged parallel to each other, and the upper end of each syringe 1 is equipped with a sealing cap 5 for the push rod 3 to pass through. A guide hole and sealing ring corresponding to the push rod 3 are provided. The piston 2 divides the syringe 1 into an upper sealed balance chamber and a lower injection chamber, and the two balance chambers are connected. This allows the push rod 3 on one side to be pushed while the push rod 3 on the other side rises, thus enabling single-handed injection and aspiration on the other side. This is equivalent to the traditional method of aspiration requiring two hands, where only one hand is needed for injection. The left syringe 1 draws in the anesthetic, while the bottom opening on the right side remains balanced with the external air pressure.

[0032] The balance chambers are connected by a rigid connecting tube 6, which is fixed between the two syringes 1. The connecting tube 6 secures the two syringes 1 to enhance the overall structural stability and facilitates grip and force application by medical personnel during one-handed operation.

[0033] The push rod 3 is an arc-shaped plate with an outward-facing arc opening. The two push rods 3 are connected by a transmission mechanism, allowing them to move in opposite directions. This transmission mechanism facilitates the conversion of the pushing force of one push rod 3 into a pulling force extending outward from the other push rod 3, thus making it easier to apply force. The plate-shaped push rod 3 increases the contact area. The two push handles 4 extend outward from the push rod 3, facilitating downward pressing on one side and upward locking on the other. Both the upper and lower ends of the push handles 4 are equipped with anti-slip grooves for slip prevention.

[0034] The transmission mechanism includes a roller 9 positioned between two push rods 3, and the roller 9 is mounted on the connecting pipe 6 via a central pivot 10. The center of the roller 9 is arc-shaped and conforms to the push rod 3. A latex pad layer to increase friction can be provided on the surface of the roller 9. The roller 9 is in close contact with the arc-shaped surface of the push rod 3 to ensure smooth and unbiased force transmission.

[0035] Working principle: This application uses two syringes 1, one for anesthesia injection and the other for aspiration. The upper chambers are connected by a connecting tube 6 to synchronize the pressure of the two chambers. When the anesthesia injection syringe 1 injects anesthesia, the pressure in the upper sealed chamber decreases, and the pressure in the sealed chamber of the aspiration syringe 1 also decreases. This causes the piston 2 in the aspiration syringe 1 to move upward and the push rod 3 to move outward. When aspiration is needed, the push rod 3 on the aspiration syringe 1 is squeezed directly, causing the pressure in the sealed chamber of the aspiration syringe 1 to decrease. The pressure in the sealed chamber of the anesthesia injection syringe 1 also decreases, causing the piston 2 in the anesthesia injection syringe 1 to move upward, thus achieving aspiration. Therefore, aspiration is achieved by squeezing and pressing, which can be done with one hand, unlike the pull-out syringes on the market that require two hands.

[0036] When the push handle 4 is plate-shaped, it is connected to the roller 9. When the push rod 3 in the anesthesia syringe 1 moves downward, the other side moves upward under the drive of the roller 9. The pushing force is converted into an outward pulling force, which is more labor-saving and assists in pulling the push rod 3 in the syringe 1 on the back side outward. At the same time, combined with the negative pressure of the sealed cavity, the two combine to significantly improve the back-pulling efficiency and operational stability.

[0037] Additionally, at this time, you can press the push handle 4 on the anesthetic syringe 1 with your thumb and hook the push handle 4 on the aspiration syringe 1 with your index finger, forming a coordinated "press and hook" action, making single-handed operation more precise, effortless, and less prone to slippage. When aspiration is needed, reverse the operation: press the push handle 4 on the aspiration syringe 1 with your thumb and hook the push handle 4 on the anesthetic syringe 1 with your index finger.

[0038] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A double-chamber aspiration syringe for anesthesia, comprising a syringe (1), a piston (2) located inside the syringe (1), a push rod (3) connected to the piston (2), and a push handle (4) disposed at the end of the push rod (3). Its features are: The injection cylinder (1) is set as two parallel cylinders, and the upper end of the injection cylinder (1) is provided with a sealing cap (5) for the push rod (3) to pass through. The piston (2) divides the injection cylinder (1) into an upper sealed balance chamber and a lower injection chamber, and the two balance chambers are connected to each other so that the push rod (3) on one side is pushed and the push rod (3) on the other side is raised, thereby realizing the retraction of the other side by pushing the injection with one hand.

2. The dual-lumen aspiration syringe for anesthesia according to claim 1, characterized in that: The balance chambers are connected by a rigid connecting tube (6), and the connecting tube (6) is fixed between the two syringes (1).

3. The dual-chamber aspiration syringe for anesthesia according to claim 2, characterized in that: The connecting pipe (6) is provided with a pull ring (7) for easy application of force.

4. The dual-chamber aspiration syringe for anesthesia according to claim 2, characterized in that: The two syringes (1) are connected by a connecting post (8) located on the lower side to increase the fixation strength.

5. The dual-chamber aspiration syringe for anesthesia according to claim 2, characterized in that: The push handle (4) is an arc-shaped plate and is inclined to facilitate inward tilting force.

6. The dual-lumen aspiration syringe for anesthesia according to claim 1, characterized in that: The push rod (3) is cylindrical.

7. The dual-chamber aspiration syringe for anesthesia according to claim 2, characterized in that: The push rod (3) is an arc-shaped plate with an arc-shaped opening facing outward. The two push rods (3) are connected by a transmission mechanism to enable the two push rods (3) to move in opposite directions.

8. The dual-chamber aspiration syringe for anesthesia according to claim 7, characterized in that: The transmission mechanism includes a roller (9) disposed between two push rods (3), and the roller (9) is mounted on the connecting pipe (6) via a central pivot (10). The central part of the roller (9) is arc-shaped and fits the push rod (3).

9. The dual-chamber aspiration syringe for anesthesia according to claim 8, characterized in that: Two push handles (4) extend out of the push rod (3) in opposite directions, and anti-slip grooves are provided at both the upper and lower ends of the push handles (4).

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