Anesthesia concentration adjustment device for anesthesiology department

Abstract

The application discloses anesthesiology concentration-adjusting anesthesia device, which comprises a base, a needle cylinder movably installed above the base, a static mixing shell body arranged at one end of the needle cylinder, a bidirectional pumping shell body arranged in the static mixing shell body, a piston slidably installed on the inner wall of the bidirectional pumping shell body, a one-way liquid flow channel one and a one-way liquid flow channel two through-connection at one end of the bidirectional pumping shell body, a one-way liquid flow channel three and a one-way liquid flow channel four through-connection at the other end of the bidirectional pumping shell body, the one-way liquid flow channel one and the one-way liquid flow channel four being through-connection, the one-way liquid flow channel two and the one-way liquid flow channel three being through-connection, a Venturi tube being installed on the one-way liquid flow channel one and the one-way liquid flow channel four, and a lidocaine container being through-connection on the Venturi tube on the one-way liquid flow channel one. The device solves the problem of poor practicability.

Description

Technical Field

[0001] This invention belongs to the field of anesthesia technology, specifically relating to an anesthesia device for adjusting the concentration of anesthesia in anesthesiology departments. Background Technology

[0002] In clinical general anesthesia, propofol emulsion and other intravenous anesthetics are widely used for induction and maintenance. Compared to inhalation anesthesia, the intravenous route relies on injection / infusion devices to deliver the drug into the patient at a lower flow rate, over a longer duration, and stably, and can be immediately coupled proximally with adjuvants such as lidocaine, glucose, or analgesics when needed. The device must ensure drug administration safety while also considering the physicochemical properties of the drug solution and the requirements of continuity, controllability, and reliability in clinical settings.

[0003] For rapidly metabolized anesthetics like propofol, the blood concentration quickly distributes from its peak to the tissues and is then eliminated by metabolism; the effective concentration at the site of action drops within minutes. Continuous resupply is necessary; otherwise, the patient will wake up or become less sensitive. During the initial induction phase or the period of heightened sensitivity to intravenous stimulation, a small amount of lidocaine is briefly combined with the primary anesthetic to reduce the irritation caused by the local flow rate shear concentration peak. During the maintenance phase, the primary anesthetic and glucose are used as the main carriers to achieve a relatively stable fluid permeability environment. At different operational points, it is necessary to switch between two pumping methods and make fine adjustments.

[0004] In anesthetic fluid infusion, a common practice is to set up two independent supply lines, each connected to a common downstream circuit via its own metering pump and switching valve assembly. By electrically or manually switching the valves, one line can be active during a specified period while the other remains in standby, allowing for phased changes in the drug formulation or dilution ratio. When switching between the two lines is necessary, the control system triggers valve reversal, or the two pumps start and stop sequentially. During the cut-off-connection transition, the merging point is prone to brief periods of zero flow, or momentary overshoot due to upstream pressure differentials and pipeline compliance release. Furthermore, frequent start-stop cycles can cause mismatches between the controller, actuators, and valves, leading to asynchronous, jammed, and hysteretic failure modes, resulting in poor practicality. This phenomenon has become a problem urgently needing to be solved by those in the field. Summary of the Invention

[0005] The purpose of this invention is to provide an anesthesia concentration adjustment device for anesthesia departments, in order to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an anesthesia device for adjusting concentration in anesthesia, comprising a base, a syringe movably mounted on the top of the base, a static mixing shell disposed at one end of the syringe, a bidirectional pumping shell disposed inside the static mixing shell, a piston slidably mounted on the inner wall of the bidirectional pumping shell, a unidirectional liquid flow channel one and a unidirectional liquid flow channel two being connected through one end of the bidirectional pumping shell, and a unidirectional liquid flow channel three and a unidirectional liquid flow channel four being connected through the other end of the bidirectional pumping shell, the unidirectional liquid flow channel one and the unidirectional liquid flow channel four being connected through one, and the unidirectional liquid flow channel two and the unidirectional liquid flow channel three being connected through one.

[0007] The present invention further illustrates that a Venturi tube is installed on both the one-way liquid flow channel two and the one-way liquid flow channel three. The Venturi tube on the one-way liquid flow channel three is connected to a lidocaine container, and the Venturi tube on the one-way liquid flow channel two is connected to a glucose container. An anesthetic drug container is connected between the one-way liquid flow channel one and the one-way liquid flow channel four.

[0008] The present invention further describes that a control rod is connected to one side of the piston, a groove is opened on one side of the bidirectional pumping housing, and one end of the control rod extends outward from the groove. Liquid flow meters are installed at both ends of the bidirectional pumping housing, a protrusion is fixedly installed on the outer wall of the bidirectional pumping housing, a rack is connected to one end of the control rod, a gear motor is fixedly installed inside the static mixing housing, a gear is connected to the output end of the gear motor, the gear meshes with the rack, and a return spring is connected between the protrusion and the control rod.

[0009] The present invention further illustrates that a U-shaped pipe is connected through the outer walls of both ends of the bidirectional pumping housing, a piston cylinder is installed on the U-shaped pipe, an inflatable gasket is clamped between the inner wall of the bidirectional pumping housing and the outer wall of the piston, and the inflatable gasket is connected through one end of the U-shaped pipe.

[0010] The present invention further describes that a large flange is fixedly installed on the outer wall of the syringe, a lead screw motor is fixedly installed on one side of the large flange, the output end of the lead screw motor is connected to a lead screw, a guide rail is fixedly installed on one side of the large flange, a small flange is slidably installed on the outer wall of the guide rail, the small flange is threadedly connected to the lead screw, a push rod is installed on one side of the small flange, one end of the push rod is connected to a liquid pushing block, and the liquid pushing block is in sliding contact with the inner wall of the syringe.

[0011] The present invention further illustrates that the push rod has a flow channel inside, and one end of the flow channel extends to the side wall of the liquid pusher block. A one-way valve is provided in the flow channel, and a flexible connecting pipe is connected through the other end of the flow channel. One end of the flexible connecting pipe is connected through to one-way liquid flow channel two and one-way liquid flow channel three.

[0012] The present invention further describes that one end of the syringe is connected to a degassing device, the degassing device includes a spherical shell, and a water-transporting microporous membrane is disposed inside the spherical shell. The water-transporting microporous membrane is spherical, and an inlet pipe and an outlet pipe are connected through the side wall of the water-transporting microporous membrane. A gas discharge pipe is disposed at the top of the spherical shell, one end of the gas discharge pipe is connected to a Roots air pump, and several bubble blocking plates are rotatably installed at the port of the outlet pipe.

[0013] The present invention further illustrates that a vibration motor is installed above the base, the output end of the vibration motor is in contact with the bottom of the syringe, and the syringe is longitudinally slidably connected to the base.

[0014] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: In the initial stage of induction and before and after airway operation, the controller configures the reciprocating cycle so that the duty cycle of path A is greater than that of path B. After rectification and static mixing, a net flow in the same direction is formed at the patient end to reduce the engineering impact of local flow velocity shear and instantaneous concentration peaks. After entering the maintenance period, path B is switched to be dominant to obtain a stable carrier fluid permeation environment.

[0015] When preset operation nodes and engineering events are detected, such as incision, traction, posture change or upstream pressure fluctuation, the flow transitions between A dominance and B dominance according to the pre-stored curve in a stepwise or linear manner. Throughout the process, there is no flow interruption or overshoot caused by valve switching at the patient end. The bridge rectification ensures unidirectional continuous output, the short-section static mixing ensures rapid homogenization, and the internal circuit avoids switching glitch, backflow and cross-voltage. The duty cycle is used to define the time average ratio. After static mixing and homogenization, the step arrival time is short and the repeatability is good. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

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

[0018] Figure 2 This is a schematic diagram of the hydraulic principle of the present invention;

[0019] Figure 3 This is a schematic diagram of the degassing device of the present invention;

[0020] Figure 4 This is a schematic diagram of the pump housing structure of the present invention;

[0021] Figure 5 This is a schematic diagram of the syringe structure of the present invention;

[0022] In the diagram: 1. Base; 2. Syringe; 3. De-airing device; 4. Injection tubing; 5. Static mixing housing; 21. Push rod; 22. Large flange; 23. Lead screw; 231. Lead screw motor; 24. Guide rail; 25. Small flange; 26. Flexible connecting tube; 27. Liquid pusher; 271. One-way valve; 28. Vibration motor; 31. Gas discharge pipe; 32. Roots air pump; 33. Water delivery microporous membrane; 34. Inlet pipe; 35. Air bubble barrier plate; 36. Drain pipe; 51. Lidocaine container; 52. Glucose 53. Glucose container; 54. Anesthetic drug container; 55. Bidirectional pump housing; 56. Piston; 57. Control lever; 58. Liquid flow meter; 59. Unidirectional liquid flow channel one; 50. Unidirectional liquid flow channel two; 51. Unidirectional liquid flow channel three; 52. Unidirectional liquid flow channel four; 53. Venturi tube; 544. Inflatable washer; 55. Piston cylinder; 56. U-shaped pipe; 57. Protrusion; 58. Rack; 59. Gear; 50. Gear motor; 51. Return spring. Detailed Implementation

[0023] The following detailed, non-limiting description of the technical solution of the present invention, in conjunction with preferred embodiments and accompanying drawings, is provided. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0024] Please see Figure 1-5The present invention provides a technical solution: an anesthesia device for adjusting concentration in anesthesia, comprising a base 1, a syringe 2 movably mounted above the base 1, a static mixing shell 5 at one end of the syringe 2, a bidirectional pumping shell 54 inside the static mixing shell 5, a piston 541 slidably mounted on the inner wall of the bidirectional pumping shell 54, a unidirectional liquid flow channel 1 561 and a unidirectional liquid flow channel 2 562 connected through one end of the bidirectional pumping shell 54, and a unidirectional liquid flow channel 3 563 and a unidirectional liquid flow channel 4 564 connected through the other end of the bidirectional pumping shell 54, the unidirectional liquid flow channel 1 561 and the unidirectional liquid flow channel 4 564 being connected through, and the unidirectional liquid flow channel 2 562 and the unidirectional liquid flow channel 3 563 being connected through. This structure forms a four-channel bridge-type geometric rectification network, so that when the piston 541 reciprocates within the bidirectional pumping shell 54, it establishes two working conditions: high pressure at the upper end and high pressure at the lower end. One-way flow channel 2 (562) and one-way flow channel 4 (564) form a pair of forward flow paths, while one-way flow channel 1 (561) and one-way flow channel 3 (563) form another pair of forward flow paths. When piston 541 pushes and generates high pressure at the upper end, the liquid enters the static mixing shell 5 along the forward loop from 562 to 564; when piston 541 returns and generates high pressure at the lower end, the liquid flows back into the static mixing shell 5 along the forward loop from 561 to 563. Through this geometric diode structure, the device achieves bidirectional pumping upstream, while the patient end always receives a net flow in the same direction, avoiding flow interruptions, reverse transients, and concentration spikes caused by traditional valve switching, thus improving the stability and reliability of anesthetic fluid infusion.

[0025] Venturi tubes 57 are installed on both one-way flow channels 2 562 and 3 563. The Venturi tube 57 on one-way flow channel 3 563 is connected to the lidocaine container 51. The Venturi tube 57 on one-way flow channel 2 562 is connected to the glucose container 52. An anesthetic drug container 53 is connected between one-way flow channel 1 561 and one-way flow channel 4 564. The Venturi tubes 57 perform low-pressure suction on the two forward circuits respectively. When piston 541 pushes forward, opening the circuit from 562 to 564, a negative pressure is created at 562 in venturi tube 57, drawing a small amount of glucose from glucose container 52 for instantaneous mixing with the main anesthetic. When piston 541 returns, opening the circuit from 561 to 563, a negative pressure is created at 563 in venturi tube 57, drawing glucose from lidocaine container 51 for mixing with the main anesthetic, while anesthetic drug container 53 continuously replenishes the anesthetic. By configuring the duty cycle through the reciprocating rhythm, the pumping of the main anesthetic and lidocaine during the initial induction phase and the stable pumping of the main anesthetic and glucose during the maintenance phase can be achieved, with smooth transitions between operational nodes. The entire process eliminates the need for complex switching structures such as solenoid valves and three-way valves, reducing the failure rate and avoiding cross-pressure between the two auxiliary fluids.

[0026] A control rod 542 is connected to one side of the piston 541. A groove is formed on one side of the bidirectional pump housing 54, and one end of the control rod 542 extends outward from the groove. Liquid flow meters 55 are installed at both ends of the bidirectional pump housing 54. A protrusion 546 is fixedly installed on the outer wall of the bidirectional pump housing 54. A rack 547 is connected to one end of the control rod 542. A gear motor 5481 is fixedly installed inside the static mixing housing 5. A gear 548 is connected to the output end of the gear motor 5481. The gear 548 meshes with the rack 547. A return spring 549 is connected between the protrusion 546 and the control rod 542. This section constitutes the reciprocating drive mechanism of the piston 541. The gear motor 5481 drives the gear 548 to rotate, and the rack 547 converts the rotation into a linear reciprocating stroke, thereby driving the control rod 542 and the piston 541 to periodically advance and retract. The return spring 549 provides return force compensation, making the reciprocating stroke stable and the cycle controllable. The liquid flow meter 55 monitors the flow rate at both ends in real time during the push and return strokes to calculate the A / B duty cycle and the stability of the output net flow. This structure uses mechanical reciprocating motion instead of solenoid valve switching to achieve purely mechanical duty cycle dispensing, which has engineering advantages such as fast response, high reliability, and good output continuity.

[0027] A U-shaped pipe 545 is connected through the outer walls of both ends of the bidirectional pumping housing 54. A piston cylinder 544 is installed on the U-shaped pipe 545. An inflatable gasket 543 is clamped between the inner wall of the bidirectional pumping housing 54 and the outer wall of the piston 541. The inflatable gasket 543 is connected through one end of the U-shaped pipe 545. The inflatable gasket 543 constitutes a flexible sealing system for the piston 541. Air is injected into the gasket through the air chamber formed by the U-shaped pipe 545 and the piston cylinder 544, so that it forms a uniform fit inside the bidirectional pumping housing 54, ensuring that the pressure of the push stroke and the return stroke are symmetrical and the leakage is minimal. The gas chamber is compliant and only expands on the side with positive pressure to make the seal better. The side with low pressure will not expand because it is not easy to leak, thus reducing friction. It can absorb high-frequency pulsation and impact, reduce the interference of instantaneous pressure difference on the Venturi tube 57, lidocaine container 51 and glucose container 52, help stabilize the low-pressure suction effect and improve the repeatability of the mixing ratio.

[0028] A large flange 22 is fixedly mounted on the outer wall of the syringe 2. A lead screw motor 231 is fixedly mounted on one side of the large flange 22. The output end of the lead screw motor 231 is connected to a lead screw 23. A guide rail 24 is fixedly mounted on one side of the large flange 22. A small flange 25 is slidably mounted on the outer wall of the guide rail 24. The small flange 25 is threadedly connected to the lead screw 23. A push rod 21 is mounted on one side of the small flange 25. One end of the push rod 21 is connected to a liquid pusher block 27. The liquid pusher block 27 slides in contact with the inner wall of the syringe 2. The lead screw motor 231 precisely controls the stroke of the liquid pusher block 27 through the lead screw 23 to achieve steady-state propulsion of the main anesthetic base solution. The guide rail 24 and the small flange 25 provide linear guidance, reduce lateral errors, and make the injection of the syringe 2 more stable.

[0029] The push rod 21 has an internal flow channel, one end of which extends to the side wall of the push block 27. A one-way valve 271 is installed within the flow channel, and the other end is connected to a flexible connecting tube 26. One end of the flexible connecting tube 26 is connected to one-way flow channels 562 and 563. The one-way valve 271 allows for the replenishment of the main anesthetic from one-way flow channels 562 and 563 during the aspiration phase, enabling automatic aspiration and replenishment of the syringe 2 during long-duration operation. The flexible connecting tube 26 provides compliance and sealing for the aspiration path, ensuring a stable volume of replenishment each time and avoiding backflow oscillations caused by the rigid tube structure. This structure ensures an uninterrupted supply of the main anesthetic and can be used in conjunction with a Venturi dosing circuit to maintain a stable concentration.

[0030] One end of the syringe 2 is connected to a degassing device 3, which includes a spherical shell. Inside the spherical shell is a water-transfer microporous membrane 33. The water-transfer microporous membrane 33 is spherical, and its sidewalls are connected to an inlet pipe 34 and an outlet pipe 36. A gas outlet pipe 31 is located at the top of the spherical shell. One end of the gas outlet pipe 31 is connected to a Roots pump 32. Several bubble-blocking plates 35 are rotatably installed at the port of the outlet pipe 36. The water-transfer microporous membrane 33 only allows liquid to pass through, preventing bubbles from penetrating. The spherical shell structure allows the liquid to form a slow swirling flow inside, thereby causing microbubbles to rise to the gas outlet pipe 31. The Roots pump 32 provides a stable micro-negative pressure, continuously extracting accumulated gas. The bubble-blocking plates 35 form a physical barrier at the outlet pipe 36, preventing bubbles from entering downstream with the liquid. This structure significantly reduces the interference of bubbles on Venturi aspiration and static mixing, ensuring the stability and safety of the anesthetic concentration output.

[0031] The bubble barrier plate 35 can rotate freely. When rotated to the vertical position, it has a gap that allows liquid to flow through and prevents bubbles from passing through by using liquid tension to adhere to its side wall. Rotating its direction can block the passage. At this time, rotating the Roots air pump 32 in the reverse direction can allow gas to enter the interior of the spherical shell, causing the gas to be pumped in reverse into the water delivery microporous membrane 33, and then into the interior of the syringe 2. This washes away the microbubbles and droplets adhering to the pores and surface of the water delivery microporous membrane 33, restoring the effective water flow area and flux of the membrane, and reducing channel resistance. Before stopping the machine and changing the bag, a reverse exhaust cycle can be performed to return the residual gas in the top cavity and some of the upstream liquid to the syringe 2 side, reducing the risk of dripping and residue.

[0032] A vibration motor 28 is mounted above the base 1. The output end of the vibration motor 28 contacts the bottom of the syringe 2. The syringe 2 is longitudinally slidably connected to the base 1. The vibration motor 28 applies low-amplitude, high-frequency vibration to the syringe 2, making it easier for microbubbles in the liquid to detach and aggregate towards the water delivery microporous membrane 33, thereby improving the overall efficiency of the debubbling device 3. The vibration also improves the turbulence within the static mixing shell 5, allowing the auxiliary liquid drawn by the venturi to enter the main liquid more evenly, improving concentration stability, and reducing adhesion stagnation caused by viscous fluids.

[0033] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features, and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An anesthesiology concentration-adjusting anesthesia device, comprising a base (1), characterized in that: A syringe (2) is movably installed above the base (1). A static mixing shell (5) is provided at one end of the syringe (2). A bidirectional pumping shell (54) is provided inside the static mixing shell (5). A piston (541) is slidably installed on the inner wall of the bidirectional pumping shell (54). One end of the bidirectional pumping shell (54) is connected to a unidirectional liquid flow channel one (561) and a unidirectional liquid flow channel two (562). The other end of the bidirectional pumping shell (54) is connected to a unidirectional liquid flow channel three (563) and a unidirectional liquid flow channel four (564). The unidirectional liquid flow channel one (561) and the unidirectional liquid flow channel four (564) are connected in a continuous manner. The unidirectional liquid flow channel two (562) and the unidirectional liquid flow channel three (563) are connected in a continuous manner. Venturi tubes (57) are installed on both the second (562) and the third (563) unidirectional liquid flow channels. The Venturi tube (57) on the third (563) unidirectional liquid flow channel is connected to a lidocaine container (51). The Venturi tube (57) on the second (562) unidirectional liquid flow channel is connected to a glucose container (52). An anesthetic drug container (53) is connected between the first (561) and the fourth (564) unidirectional liquid flow channel. A large flange (22) is fixedly installed on the outer wall of the syringe (2). A lead screw motor (231) is fixedly installed on one side of the large flange (22). A lead screw (23) is connected to the output end of the lead screw motor (231). A guide rail (24) is fixedly installed on one side of the large flange (22). A small flange (25) is slidably installed on the outer wall of the guide rail (24). The small flange (25) is threadedly connected to the lead screw (23). A push rod (21) is installed on one side of the small flange (25). A liquid pusher (27) is connected to one end of the push rod (21). The liquid pusher (27) slides in contact with the inner wall of the syringe (2). The push rod (21) has a flow channel inside, and one end of the flow channel extends to the side wall of the push block (27). A one-way valve (271) is installed in the flow channel, and a flexible connecting pipe (26) is connected to the other end of the flow channel. One end of the flexible connecting pipe (26) is connected to the one-way liquid flow channel two (562) and the one-way liquid flow channel three (563).

2. The anesthesia device for adjusting anesthesia concentration in an anesthesiology department according to claim 1, characterized in that: A control rod (542) is connected to one side of the piston (541). A groove is opened on one side of the bidirectional pumping housing (54), and one end of the control rod (542) extends outward from the groove. Liquid flow meters (55) are installed at both ends of the bidirectional pumping housing (54). A protrusion (546) is fixedly installed on the outer wall of the bidirectional pumping housing (54). A rack (547) is connected to one end of the control rod (542). A gear motor (5481) is fixedly installed inside the static mixing housing (5). A gear (548) is connected to the output end of the gear motor (5481). The gear (548) meshes with the rack (547). A return spring (549) is connected between the protrusion (546) and the control rod (542).

3. The anesthesia device for adjusting concentration in anesthesia according to claim 2, characterized in that: The outer walls of both ends of the bidirectional pumping housing (54) are connected to U-shaped pipes (545), and a piston cylinder (544) is installed on the U-shaped pipes (545). An inflatable gasket (543) is clamped between the inner wall of the bidirectional pumping housing (54) and the outer wall of the piston (541), and the inflatable gasket (543) is connected to one end of the U-shaped pipe (545).

4. The anesthesia device for adjusting concentration in anesthesia according to claim 3, characterized in that: One end of the syringe (2) is connected to a degassing device (3). The degassing device (3) includes a spherical shell, and a water-transporting microporous membrane (33) is provided inside the spherical shell. The water-transporting microporous membrane (33) is spherical, and an inlet pipe (34) and a drain pipe (36) are connected through the side wall of the water-transporting microporous membrane (33). A gas discharge pipe (31) is provided at the top of the spherical shell. One end of the gas discharge pipe (31) is connected to a Roots air pump (32). Several bubble blocking plates (35) are rotatably installed at the port of the drain pipe (36).

5. The anesthesia device for adjusting concentration in anesthesia according to claim 4, characterized in that: A vibration motor (28) is installed above the base (1). The output end of the vibration motor (28) is in contact with the bottom of the syringe (2). The syringe (2) is longitudinally slidably connected to the base (1).

Images