High-capacity anesthetic syringe capable of being drawn back by single hand and use method
By introducing an air intake and guiding mechanism into the anesthesia injector, increasing the diameter of the syringe barrel and reducing the length of the plunger, an anesthesia injector that can be withdrawn with one hand was designed. This solves the problem that female doctors have difficulty operating large syringes with one hand, and achieves the effect of simplifying operation and adapting to operators with small hands.
Patent Information
- Application Number
- CN202511439664.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-10
- Publication Date
- 2025-12-19
AI Technical Summary
During anesthesia procedures, female physicians and other operators with smaller hands often find it difficult to hold a large syringe steadily with one hand and perform aspiration.
An anesthesia injector designed for single-handed retraction is described. By setting an air intake mechanism and a guide mechanism between the plunger and the plunger handle, single-handed retraction is achieved using a negative pressure chamber. An external hole is provided on the plunger handle to control the airflow of the negative pressure chamber. Combined with the design of the guide sleeve and sealing ring, the diameter of the syringe is increased and the length of the plunger is reduced to accommodate operators with small hands.
It enables single-handed injection and aspiration of anesthetics, simplifies the procedure, makes it suitable for female doctors with small hands, and reduces the difficulty of operation.
Smart Images
Figure CN121154973A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of large capacity anesthesia syringe back flushing, in particular to a large capacity anesthesia syringe capable of single hand back flushing operation and a using method. BACKGROUND
[0002] In the anesthesia operation, 30mL syringe is often used to inject anesthetic drugs. The operator usually holds the ultrasonic probe with one hand and performs injection with the other hand, and also needs to perform back flushing during the injection process, which is a challenge for the operator, especially for female doctors with small hands: it is difficult to stably hold and inject a large syringe with one hand, and it is also inconvenient to complete the back flushing operation. Therefore, how to achieve single hand back flushing during the anesthesia injection process is a problem that needs to be solved by the technical personnel in the field. SUMMARY
[0003] The purpose of the present application is to provide a large capacity anesthesia syringe capable of single hand back flushing operation and a using method to solve the problems raised in the background.
[0004] To achieve the above purpose, the present application provides the following technical scheme: a large capacity anesthesia syringe capable of single hand back flushing operation, comprising a syringe barrel, a rubber plug installed in the syringe barrel, a push rod connected with the rubber plug, and a push handle connected at the end of the push rod, the push rod is hollow inside and in tubular shape, and the push handle is also hollow structure, the inner cavities of the push rod and the push handle are communicated, further comprising an air inlet mechanism arranged between the push rod and the push handle, and a sealing guide mechanism arranged between the push rod and the opening of the syringe barrel, a negative pressure cavity is formed between the guide mechanism and the rubber plug in the syringe barrel, the negative pressure cavity can generate negative pressure for back flushing when the air inlet mechanism is blocked and during injection, the negative pressure cavity gradually generates negative pressure when the air inlet mechanism is blocked, and the finger will be pushed back when there is no injection, realizing single hand back flushing, and the guide mechanism is used for guiding and sealing.
[0005] Preferably, the air inlet mechanism comprises an inner hole opened in the circumferential bottom of the push rod and an outer hole opened in the upper end of the push handle, and the negative pressure cavity can communicate with the outside through the inner hole and the outer hole.
[0006] Preferably, the outer hole is close to the edge of the push handle to facilitate the middle force, and is located at the edge and not easy to touch during normal injection.
[0007] Preferably, the guide mechanism comprises a guide sleeve sleeved on the push rod, and the lower end of the guide sleeve is circumferentially provided with a sealing ring abutting against the push rod, of course, the upper side can also be provided with a sealing ring, mainly with good sealing effect, and the circumferential direction of the guide sleeve is sealingly connected with the syringe barrel through an annular support plate, and the support plate is used for supporting and mounting.
[0008] Preferably, the circumferential direction of the support plate forms an annular mounting sleeve downwardly, and the mounting sleeve is sealingly mounted on the syringe, and the mounting sleeve is mainly convenient for mounting, and the push rod end and the rubber plug are connected, and the mounting of the guide sleeve is mainly convenient.
[0009] Preferably, the support plate is provided with a through hole for balancing air pressure, and further comprises an elastic sealing mechanism arranged between the guide sleeve and the lower end of the mounting sleeve, and the sealing mechanism can reduce the force of the negative pressure cavity and slowly back off, and the sealing mechanism buffers with the change of the negative pressure, so that the rebounding force of the thumb is reduced, and it is more comfortable, like a paralysis buffer.
[0010] Preferably, the sealing mechanism comprises an elastic annular film arranged between the guide sleeve and the mounting sleeve, and under the action of the negative pressure of the negative pressure cavity, the film is deformed to buffer the negative pressure, and the pinch is more relaxed, and then the elastic deformation is combined with back-off.
[0011] Preferably, the inner diameter of the syringe is greater than 25 mm, and the length of the push rod is less than 100 mm. The size of a normal 30 ml syringe is that the inner cavity diameter is about 23 mm, and the length of the push handle is about 115 mm. Here, the diameter is increased, and the length is reduced. If the female hand is small, the operation is convenient, and it is not inconvenient to exert force due to too long length.
[0012] An operation method for the large-capacity anesthetic syringe capable of single-hand back-off operation, comprising the following steps: Injection: the index finger and the middle finger hold the syringe, the thumb presses the middle part of the push handle, avoids the outer hole, and stops at the required position. This state is the same as normal injection of anesthetic; Back-off: when back-off is required, the thumb presses the outer hole on the push handle and pushes the injection, stops at the required position, and returns along with the push handle under the action of the negative pressure of the negative pressure cavity. The thumb blocks the outer hole without separation, maintains the sealing state, and realizes back-off. Compared with normal injection, when back-off is required, the outer hole needs to be pressed during injection to generate negative pressure in the negative pressure cavity. The slow back-off can be realized by using the negative pressure when stopping.
[0013] Compared with the prior art, the beneficial effects of the present application are: 1. The thumb presses the middle part of the push handle to avoid the outer hole, so that normal injection can be realized. When back-off is required, the thumb presses the outer hole on the push handle and pushes the injection, stops at the required position, and returns along with the push handle under the action of the negative pressure of the negative pressure cavity. The thumb blocks the outer hole without separation, maintains the sealing state, and realizes back-off, so as to realize single-hand operation without external pulling, which is simple and convenient. 2. By increasing the diameter of the syringe and reducing the length of the push rod, the injection stroke is shorter under the same capacity, and it is more suitable for women with small hands. BRIEF DESCRIPTION OF DRAWINGS
[0014] Fig. 1 Structure diagram of the first embodiment of the present application; Fig. 2 Front view of the first embodiment of the present application; Fig. 3 Axial view of the first embodiment of the present application; Fig. 4 Structure diagram of the second embodiment of the present application; Fig. 5 Axial view of the second embodiment of the present application; Fig. 6 Exploded view of the second embodiment of the present application.
[0015] In the figure: 1, syringe; 2, rubber plug; 3, push rod; 4, push handle; 5, inner hole; 6, outer hole; 7, guide sleeve; 8, support plate; 9, mounting sleeve; 10, through hole; 11, film. DETAILED DESCRIPTION
[0016] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.
[0017] Embodiment one Please refer to Figs. 1 to 3 The present application provides a large-capacity anesthetic syringe capable of single-handedly retracting operation and a use method technical solution. The large-capacity anesthetic syringe capable of single-handedly retracting operation comprises a syringe 1, a rubber plug 2 installed in the syringe 1, a push rod 3 connected with the rubber plug 2, and a push handle 4 connected at the end of the push rod 3. The push rod 3 is a hollow tube, and the push handle 4 is also hollow. The inner cavities of the push rod 3 and the push handle 4 are communicated. The large-capacity anesthetic syringe further comprises an air inlet mechanism arranged between the push rod 3 and the push handle 4, and a sealing guide mechanism arranged between the push rod 3 and the opening of the syringe 1. A negative pressure cavity is formed between the guide mechanism and the rubber plug 2 in the syringe 1. When the air inlet mechanism on the push handle 4 is blocked and injection is performed, the negative pressure cavity can generate negative pressure to facilitate retraction. When the air inlet mechanism is blocked, the negative pressure cavity gradually generates negative pressure. When injection is no longer performed, the fingers will be pushed back to rebound, achieving single-handed retraction. The guide mechanism is used for guiding and sealing.
[0018] The air inlet mechanism comprises an inner hole 5 opened in the circumferential bottom of the push rod 3 and an outer hole 6 opened in the upper end of the push handle 4. The negative pressure cavity can be communicated with the outside through the inner hole 5 and the outer hole 6. The outer hole 6 is close to the edge of the push handle 4 to facilitate middle force application and is located at the edge, which is not easy to touch during normal injection.
[0019] The guide mechanism includes a guide sleeve 7 sleeved on the push rod 3, and the lower end of the guide sleeve 7 is provided with a sealing ring abutting against the push rod 3. Of course, a sealing ring can also be provided on the upper side, mainly for good sealing effect. The circumference of the guide sleeve 7 is sealingly connected with the injection cylinder 1 through an annular support plate 8, which is used for support and installation. The circumference of the support plate 8 downwardly forms an annular mounting sleeve 9, which is sealingly mounted on the injection cylinder 1. The mounting sleeve 9 is mainly for convenient installation. After all, the rubber plug 2 needs to be installed first. Therefore, the process can be adjusted as needed, including the connection between the end of the push rod 3 and the rubber plug 2, mainly for the convenience of installation of the guide sleeve 7.
[0020] Embodiment two As Figs. 4 to 6 As a preferred mode based on embodiment one, the support plate 8 is provided with a through hole 10 for balancing air pressure, and further includes an elastic sealing mechanism arranged between the lower ends of the guide sleeve 7 and the mounting sleeve 9. The sealing mechanism can reduce the force of the negative pressure cavity and slowly withdraw. The sealing mechanism buffers with the change of negative pressure, which reduces the rebound force of the thumb and is more comfortable, like a paralysis buffer. The sealing mechanism includes an elastic annular film 11 arranged between the guide sleeve 7 and the mounting sleeve 9. Under the action of the negative pressure of the negative pressure cavity, the film 11 deforms to buffer the negative pressure, and the pinch is more relaxed. Then, the elastic deformation is combined with the withdrawal. The through hole 10 ensures the normal elastic deformation of the film 11.
[0021] As a preferred mode, the inner diameter of the injection cylinder 1 is greater than 25 mm, and the length of the push rod 3 is less than 100 mm. The size of a normal 30 ml syringe is that the inner cavity diameter is about 23 mm, and the length of the push handle is about 115 mm. Here, the diameter is increased, and the length is reduced. For women with small hands, it is convenient to operate, and it is not too long to apply force. Of course, it is not limited to 30 ml here, and the diameter can be increased and the length can be reduced for a 20 ml syringe, which is suitable for women with small hands.
[0022] An operation method for the large-capacity anesthetic syringe capable of single-handed withdrawal operation as described above includes the following steps: Injection: The index finger and the middle finger hold the injection cylinder 1, the thumb presses the middle part of the push handle 4, avoids the outer hole 6, and stops at the required position. This state is the same as normal anesthetic injection; Withdrawal: When withdrawal is needed, the thumb presses the outer hole 6 on the push handle 4 and pushes the injection, stops at the required position, and returns with the push handle 4 under the action of the negative pressure of the negative pressure cavity. The outer hole 6 is blocked and does not come off, maintaining the sealing state, achieving withdrawal. Compared with normal injection, when withdrawal is needed, the outer hole 6 needs to be pressed during injection to generate negative pressure in the negative pressure cavity. Then, the negative pressure can be used to slowly withdraw when stopping.
[0023] Working principle: the thumb presses the middle part of the push handle 4, avoids the outer hole 6, can realize normal injection, when it needs to be withdrawn, the thumb presses the outer hole 6 on the push handle 4, and pushes the injection, stops at the required position, with the negative pressure effect of the negative pressure cavity, the thumb returns with the push handle 4, and blocks the outer hole 6 without separation, maintains the sealing state, realizes the withdrawal, and thus realizes the single-handed operation, without external pulling, simple and convenient; By increasing the diameter of the injection barrel 1 and reducing the length of the push rod 3, the injection stroke is shorter under the same capacity, which is more suitable for women with small hands.
[0024] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.
Claims
1. A large-capacity anesthesia injector for single-handed retraction operation, comprising a syringe (1), a rubber stopper (2) installed inside the syringe (1), a plunger (3) connected to the rubber stopper (2), and a plunger handle (4) connected to the end of the plunger (3), characterized in that: The push rod (3) is a hollow tube, and the push handle (4) is also hollow. The inner cavity of the push rod (3) and the push handle (4) are connected. It also includes an air intake mechanism between the push rod (3) and the push handle (4) and a sealing guide mechanism between the push rod (3) and the opening of the injection cylinder (1). The guide mechanism and the rubber stopper (2) form a negative pressure cavity in the injection cylinder (1). The air intake mechanism on the push handle (4) is blocked and when it is pushed, the negative pressure cavity can generate negative pressure so as to draw back.
2. The large-capacity anesthesia syringe capable of single-handed aspiration operation according to claim 1, characterized in that: The air intake mechanism includes an inner hole (5) at the bottom of the push rod (3) and an outer hole (6) at the top of the push handle (4). The negative pressure chamber can communicate with the outside through the inner hole (5) and the outer hole (6).
3. The large-capacity anesthesia syringe capable of single-handed aspiration operation according to claim 2, characterized in that: The outer hole (6) is located near the edge of the push handle (4) to facilitate the application of force in the middle.
4. The large-capacity anesthesia syringe capable of single-handed aspiration operation according to claim 1, characterized in that: The guiding mechanism includes a guide sleeve (7) fitted onto the push rod (3), and a sealing ring is provided on the lower end of the guide sleeve (7) in the circumferential direction to abut against the push rod (3). The guide sleeve (7) is circumferentially sealed to the injection cylinder (1) through an annular support plate (8).
5. The large-capacity anesthesia syringe capable of single-handed aspiration operation according to claim 4, characterized in that: The support plate (8) forms an annular mounting sleeve (9) in the circumferential direction downward, and the mounting sleeve (9) is sealed and mounted on the injection cylinder (1).
6. The large-capacity anesthesia syringe capable of single-handed aspiration operation according to claim 5, characterized in that: The support plate (8) is provided with a through hole (10) for balancing air pressure, and also includes an elastic sealing mechanism provided between the lower ends of the guide sleeve (7) and the mounting sleeve (9). The sealing mechanism can reduce the force of the negative pressure chamber and slowly retract.
7. The large-capacity anesthesia syringe capable of single-handed aspiration operation according to claim 6, characterized in that: The closure mechanism includes an elastic annular film (11) disposed between the guide sleeve (7) and the mounting sleeve (9).
8. The large-capacity anesthesia syringe capable of single-handed aspiration operation according to claim 1, characterized in that: The inner diameter of the syringe (1) is greater than 25 mm, and the length of the push rod (3) is less than 100 mm.
9. A method of using a large-volume anesthesia syringe capable of single-handed aspiration operation as described in any one of claims 1 to 8, characterized in that, Includes the following steps: Injection: Hold the syringe (1) between your index and middle fingers, press the middle of the plunger (4) with your thumb, avoiding the outer hole (6), and stop when you reach the desired position; Pullback: When pullback is required, press the outer hole (6) on the push handle (4) with your thumb and push the injection until the desired position is reached. With the negative pressure of the negative pressure chamber, your thumb returns with the push handle (4) and blocks the outer hole (6) to prevent it from coming off, thus maintaining a sealed state and achieving pullback.