Drug supply anesthesia device

Abstract

The invention discloses a medicine supply anesthesia device, particularly relates to the technical field of medical instruments, and solves the technical problem that the flow of liquid output by an automatic control pump in the prior art can generate reduced bad fluctuation. The pump comprises a pump shell, a pump core and a guide pipe, wherein the pump core is arranged in the pump shell; an elastic bag tube is hooped outside the pump core, and two ends of the elastic bag tube are hermetically connected with the pump core; the catheter passes through the interior of the pump core and is communicated to the inner side of the elastic balloon tube; a plurality of elastic capsule flaps are uniformly distributed around the outside of the elastic capsule tube, the inner side of each elastic capsule flap is tightly contacted with the outer surface of the elastic capsule tube, and the two ends of each elastic capsule flap are fixedly connected with the pump core; a first magnet is arranged in each elastic capsule valve, and a second magnet attracted with the first magnet is arranged in the pump core. According to the device, the magnetic force between the second magnet and the first magnet is gradually increased, so that the elastic capsule valve compensates the gradually-reduced deformation restoring force of the elastic capsule tube, and then the pressure is kept constant in the process that the elastic capsule tube becomes smaller.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a drug supply anesthesia device. Background Art

[0002] Patient-controlled analgesia (PCA) is a method in which a patient, when feeling pain, presses a dosing button connected to a PCA device to inject an appropriate amount of analgesic into the body, thereby achieving a pain-relieving effect.

[0003] There are two types of PCA devices, according to the type, structure and method of use. One is an electronic pump and the other is a disposable self-controlled pump. The disposable self-controlled pump consists of two parts: (1) The tubular injection pump part: the outside is made of hard plastic, and there is a drug storage bag inside, which contains analgesics. (2) The control part: It is a small plastic box with a button connected to the tubular injection pump and the body by thin catheters at both ends. When the patient feels pain in the incision, just press the button on the plastic box lightly, and a small dose of painkillers will be injected into the body. After 1 to 2 minutes, the pain of the incision will be relieved.

[0004] The price of disposable automatic pump is low, because it can avoid cross infection between patients by disposable use. However, it relies on the rebound pressure of the medicine bag to transport liquid. The medicine bag has the characteristic that the greater the expansion, the greater the rebound force; that is, the medicine bag expands more at the beginning, and the internal liquid pressure is greater; as the liquid is output, the medicine bag shrinks, and the internal liquid pressure decreases; and the liquid flow rate is proportional to the pressure, and the flow rate is proportional to the flow rate; therefore, the flow rate of the liquid output by the automatic pump will produce a decrease in adverse fluctuations, and the flow accuracy is not as good as that of the electronic automatic pump, which affects its application to a certain extent. Summary of the invention

[0005] The invention provides a drug supply anesthesia device, which is used to solve the technical problem in the prior art that the liquid flow output by the automatic control pump will produce reduced adverse fluctuations.

[0006] The technical solution adopted by the present invention is as follows:

[0007] A drug supply anesthesia device comprises a pump housing, a pump core and a catheter, wherein the pump core is arranged inside the pump housing; the outer hoop of the pump core is provided with an elastic capsule tube, and the two ends of the elastic capsule tube are sealed and connected to the pump core; the catheter passes through the interior of the pump core and is connected to the inner side of the elastic capsule tube; the outer side of the elastic capsule tube is evenly distributed with a plurality of elastic capsule petals, the inner side of each elastic capsule petal is in close contact with the outer surface of the elastic capsule tube and the two ends are fixedly connected to the pump core; a first magnet is arranged inside each elastic capsule petal, and a second magnet that attracts the first magnet is arranged inside the pump core.

[0008] With the above technical solution, the catheter is first closed by the clamp, and then a dose of anesthetic is added to the pump core with a syringe. The anesthetic enters the interior of the elastic bag tube along with the pump core and expands the elastic bag tube. After the addition is completed, the clamp is opened to exhaust gas, and the elastic bag tube is connected to the human body after the exhaust is completed. When the elastic bag tube is expanded, the elastic bag valve will also be tightly attached to the outer wall of the elastic bag tube and expand. At this time, the distance between the first magnet and the second magnet becomes larger, and the magnetic force formed between the first magnet and the second magnet is the smallest. At the same time, the elastic bag tube has a large force to restore the deformation. In the process of gradual infusion of the anesthetic, the elastic bag tube becomes smaller under the action of the deformation recovery force, thereby exerting pressure on the internal anesthetic, thereby pressing the anesthetic into the catheter and infusing it into the patient's body. At this time, due to the As the elastic bag tube gradually recovers its shape and becomes smaller, the deformation recovery force will gradually decrease, and thus the pressure applied to the anesthetic will gradually decrease. At the same time, as the elastic medicine bag assembly recovers and becomes smaller, the elastic bag valve will also become smaller and shorter again under the action of the deformation recovery force, thereby reducing the distance between the first magnet and the second magnet. Since the second magnet is a fixed part, and the magnetic attraction between the magnets is inversely proportional to the distance between the magnets, the magnetic force between the second magnet and the first magnet will gradually increase, thereby compensating for the gradually decreasing deformation recovery force of the elastic bag tube, so that the elastic bag tube maintains a constant pressure on the anesthetic in the process of shrinking. Since the liquid flow rate is proportional to the pressure, the flow rate is proportional to the flow rate, and since the pressure remains constant, the flow rate will not be adversely affected by fluctuations in size.

[0009] Preferably, the first magnet is arranged at the midpoint of the elastic capsule valve.

[0010] By adopting the above technical solution, the magnetic attraction force generated between the first magnet and the second magnet can act evenly on the entire elastic bag tube, which is helpful to compensate for the gradually reduced deformation recovery force of the elastic bag tube.

[0011] Preferably, the pump core includes a fixed sleeve whose end is fixedly connected to the pump casing via a first end cover, and the conduit is connected to the interior of the fixed sleeve; a guide rod is slidably connected to the interior of the fixed sleeve, and a liquid passage groove is provided on the inner wall of the fixed sleeve; the guide rod is provided with a second end cover at the end away from the conduit, the elastic sac tube and the elastic sac valve are both arranged between the first end cover and the second end cover, and both ends of the elastic sac tube and the elastic sac valve are respectively fixedly connected to the first end cover and the second end cover; the second magnet is slidably arranged in the fixed sleeve.

[0012] By adopting the above technical solution, when a dose of anesthetic is added to the pump core by a syringe, the anesthetic enters the inner cavity of the fixed sleeve through the catheter, and then enters the elastic bag tube through the liquid passage groove to expand the elastic bag tube. During the expansion process of the elastic bag tube, since the elastic bag tube and the elastic bag flap are arranged between the first end cover and the second end cover, and the two ends of the elastic bag tube and the elastic bag flap are respectively fixedly connected to the first end cover and the second end cover, the elastic bag tube will drive the second end cover to move when the elastic bag tube expands. At this time, the elastic bag tube will not only expand in the radial direction, but also The elastic bag tube will also be pulled and expanded in the axial direction, thereby making full use of the elastic properties of the elastic bag tube to increase the internal volume of the elastic bag tube, and while the elastic bag tube is expanding, the guide rod will slide inside the fixed sleeve to guide the elastic bag tube to be pulled and expanded in the axial direction to prevent the expansion and pulling and tilting; and the second magnet is slidably arranged in the fixed sleeve, so that the magnetic force generated between the first magnet and the second magnet can make the second magnet produce vertical follow-up movement during the movement of the first magnet, thereby making the first magnet and the second magnet able to remain constant on the same horizontal plane.

[0013] Preferably, the outer side of the fixed sleeve is surrounded by a first sliding groove having the same number as the first magnet, a sliding block is slidably connected in the first sliding groove, the sliding direction of the sliding block is the same as the sliding direction of the guide rod, and the second magnet is fixedly arranged inside the sliding block; the length of the first sliding groove is S1, which satisfies the following formula:

[0014] S1=h1+l1; wherein h1 is the maximum displacement length of the first magnet in the vertical direction, and l1 is the length of the sliding block.

[0015] By adopting the above technical solution, the second magnet can slide along the first sliding groove in the vertical direction along with the sliding block.

[0016] Preferably, a second sliding groove connected to and parallel to the first sliding groove is provided inside the fixed sleeve, a transmission plate fixedly connected to the sliding block is slidably connected in the second sliding groove, and a transmission mechanism is provided between the transmission plate and the guide rod, so that during the sliding process of the guide rod, the first magnet and the second magnet are maintained on the same horizontal plane.

[0017] By adopting the above technical solution, during the process of the elastic bag tube expanding or shrinking, the guide rod will slide inside the fixed sleeve. During the sliding process, the guide rod drives the transmission plate to slide through the transmission mechanism, and then drives the second magnet to slide along the second sliding groove as the first magnet slides in the vertical direction. Under the influence of the magnetic force generated between the first magnet and the second magnet, it is more conducive to maintaining the first magnet and the second magnet on the same horizontal plane.

[0018] Preferably, the transmission mechanism comprises a driving tooth and a driven tooth rotatably disposed inside the fixed sleeve, the driving tooth and the driven tooth meshing with each other; the driving tooth is coaxially fixedly connected with a first driving tooth, the first driving tooth is rotatably disposed inside the fixed sleeve and meshing with a first rack on the guide rod; the driven tooth is coaxially fixedly connected with a second driving tooth, the second driving tooth is rotatably disposed inside the fixed sleeve and meshing with a second rack on the transmission plate; the gear ratio of the driving tooth to the driven tooth is i, which satisfies the following formula: Among them, h2 is the displacement length of the guide rod, h1 is the maximum displacement length of the first magnet in the vertical direction; the number of teeth and the module of the first driving tooth and the second driving tooth are the same; the module of the first rack and the second rack is the same.

[0019] By adopting the above technical solution, when the guide rod slides, the first meshing tooth is driven to rotate through the first rack, thereby causing the active tooth to rotate, the active tooth rotates and meshes to drive the driven tooth to rotate, the driven tooth rotates and drives the second meshing tooth to rotate, thereby driving the transmission plate to slide through the second rack, thereby driving the second magnet to slide along with the sliding of the first magnet in the vertical direction; and since the gear ratio between the active tooth and the driven tooth is i, Among them, h2 is the displacement length of the guide rod, and h1 is the maximum displacement length of the first magnet in the vertical direction. Therefore, during the transmission process, the transmission mechanism can make the second magnet move along a path that is the same as the length of the first magnet's vertical movement path during the sliding of the guide rod, thereby making it easier for the first magnet and the second magnet to maintain the same horizontal plane under the influence of the magnetic force generated between the first magnet and the second magnet.

[0020] Preferably, a screw is provided at the top end of the second end cover, and a rotating sleeve is rotatably connected inside the pump casing, and the rotating sleeve is threadedly sleeved on the outside of the screw; worm teeth are provided on the outside of the rotating sleeve, and a worm wheel meshing with the worm teeth is rotatably connected inside the pump casing, and an indicator plate is fixedly connected to the outside of the worm wheel, and the indicator plate is movably arranged in a fan-shaped groove inside the pump casing, and the outside of the fan-shaped groove is connected to an arc-shaped scale plate made of transparent material.

[0021] By adopting the above technical solution, the scale on the arc-shaped scale plate represents the amount of anesthetic drugs inside the elastic bag tube. During the sliding process of the guide rod, the relative position of the second end cover in the vertical direction inside the pump housing will change. At this time, the second end cover drives the screw to move, and the screw drives the rotating sleeve to rotate, thereby causing the worm teeth on the outside of the rotating sleeve to rotate, thereby driving the worm wheel to rotate, and the worm wheel drives the indicator plate to rotate along the fan-shaped groove, and the outside of the indicator plate points to the corresponding mark on the arc-shaped scale plate.

[0022] Preferably, a flow controller is connected in parallel to the catheter, a three-way valve is provided on the catheter, the catheter is connected to the middle interface of the three-way valve, the inlet of the flow controller is connected to the first branch interface of the three-way valve, the second branch interface of the three-way valve is connected to the second catheter, the end of the second catheter is connected to the human body, and the outlet of the flow controller merges into the second catheter.

[0023] By adopting the above technical solution, the device can have two working modes, one of which is: the three-way valve switch is turned to connect the first branch interface with the middle interface, at which time the flow controller is started, and the patient can use PCA, that is, patient-controlled analgesia. That is, when the patient feels pain, he presses the flow controller by himself to inject an appropriate amount of analgesic into the body, thereby achieving an analgesic effect; the other working mode is: the three-way valve switch is turned to connect the second branch interface with the middle interface, at which time the flow controller is closed, so that the patient can be continuously supplied with medicine.

[0024] Preferably, the catheter is provided with a liquid charger adapted to the syringe, and the second catheter is provided with a clamp.

[0025] By adopting the above technical solution, the clamp on the second catheter is first closed to close the entire catheter, and then anesthetic is added to the inside of the pump core through the liquid charger.

[0026] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0027] 1. When the elastic bag tube is expanded, the elastic bag flap will also be expanded and closely attached to the outer wall of the elastic bag tube. At this time, the distance between the first magnet and the second magnet becomes larger, and the magnetic force formed between the first magnet and the second magnet is the smallest. At the same time, the elastic bag tube has a large force to restore the deformation. During the gradual infusion of the anesthetic, the elastic bag tube becomes smaller under the action of the deformation recovery force, thereby exerting pressure on the internal anesthetic, thereby pressing the anesthetic into the catheter and infusing it into the patient's body. At this time, since the elastic bag tube gradually recovers its shape and becomes smaller, the deformation recovery force will gradually decrease, and thus the pressure exerted on the anesthetic gradually decreases. At the same time, due to the The elastic medicine bag assembly recovers and becomes smaller, so the elastic bag valve will also become smaller and shorter under the action of the deformation recovery force, thereby reducing the distance between the first magnet and the second magnet. Since the second magnet is a fixed part, and the magnetic attraction between the magnets is inversely proportional to the distance between the magnets, the magnetic force between the second magnet and the first magnet will gradually increase, thereby compensating for the gradually decreasing deformation recovery force of the elastic bag tube, so that the elastic bag tube maintains a constant pressure on the anesthetic in the process of shrinking. Since the liquid flow rate is proportional to the pressure, the flow rate is proportional to the flow rate. Since the pressure remains constant, the flow rate will not be affected by the adverse effects of shrinking fluctuations.

[0028] 2. The first magnet is arranged at the midpoint of the elastic capsule valve, so that the magnetic attraction force generated between the first magnet and the second magnet can act evenly on the entire elastic capsule tube, which is helpful to compensate for the gradually reduced deformation recovery force of the elastic capsule tube.

[0029] 3. When a dose of anesthetic is added to the pump core with a syringe, the anesthetic enters the inner cavity of the fixed sleeve through the catheter, and then enters the elastic bag tube through the liquid passage groove to expand the elastic bag tube. During the expansion process of the elastic bag tube, since the elastic bag tube and the elastic bag flap are arranged between the first end cover and the second end cover, and the two ends of the elastic bag tube and the elastic bag flap are respectively fixedly connected to the first end cover and the second end cover, when the elastic bag tube expands, the elastic bag tube will drive the second end cover to move. At this time, the elastic bag tube will not only expand in the radial direction, but also expand in the radial direction. The elastic bag tube is also pulled and expanded in the axial direction, so that the elastic properties of the elastic bag tube can be fully utilized to increase the internal volume of the elastic bag tube, and when the elastic bag tube is expanded, the guide rod will slide inside the fixed sleeve, thereby guiding the elastic bag tube to be pulled and expanded in the axial direction to prevent the expansion and pulling from tilting; and the second magnet is slidably arranged in the fixed sleeve, so that the magnetic force generated between the first magnet and the second magnet can make the second magnet produce vertical follow-up movement during the movement of the first magnet, so that the first magnet and the second magnet can be kept constant on the same horizontal plane.

[0030] 4. During the expansion or contraction of the elastic bag tube, the guide rod will slide inside the fixed sleeve. During the sliding process, the guide rod drives the transmission plate to slide through the transmission mechanism, and then drives the second magnet to slide along the second sliding groove as the first magnet slides in the vertical direction. Under the influence of the magnetic force generated between the first magnet and the second magnet, it is more conducive to maintaining the first magnet and the second magnet on the same horizontal plane.

[0031] 5. When the guide rod slides, the first meshing tooth is driven to rotate through the first rack, thereby causing the active tooth to rotate, the active tooth rotates and meshes to drive the driven tooth to rotate, the driven tooth rotates and drives the second meshing tooth to rotate, thereby driving the transmission plate to slide through the second rack, thereby driving the second magnet to slide along with the sliding of the first magnet in the vertical direction; and since the gear ratio of the active tooth to the driven tooth is i, Among them, h2 is the displacement length of the guide rod, and h1 is the maximum displacement length of the first magnet in the vertical direction. Therefore, during the transmission process, the transmission mechanism can make the second magnet move along a path that is the same as the length of the first magnet's vertical movement path during the sliding of the guide rod, thereby making it easier for the first magnet and the second magnet to maintain the same horizontal plane under the influence of the magnetic force generated between the first magnet and the second magnet.

[0032] 6. During the sliding of the guide rod, the relative position of the second end cover in the vertical direction inside the pump casing will change. At this time, the second end cover drives the screw to move, and the screw drives the rotating sleeve to rotate, thereby causing the worm teeth on the outside of the rotating sleeve to rotate, thereby driving the worm wheel to rotate, and the worm wheel drives the indicator plate to rotate along the fan-shaped groove, and the outside of the indicator plate points to the corresponding mark on the arc scale plate.

[0033] 7. This device can have two working modes, one of which is: turn the three-way valve switch to the first branch interface connected to the middle interface, then the flow controller is started, and the patient can use PCA, that is, patient-controlled analgesia. When the patient feels pain, he presses the flow controller by himself to inject an appropriate amount of analgesics into the body, thereby achieving an analgesic effect; the other working mode is: turn the three-way valve switch to the second branch interface connected to the middle interface, then the flow controller is closed, so that the patient can be continuously supplied with medicine. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The present invention will now be described by way of example with reference to the accompanying drawings, in which:

[0035] Figure 1 It is a structural schematic diagram of a drug supply anesthesia device in the present invention;

[0036] Figure 2 It is a schematic diagram of the structure of the pump casing in the present invention;

[0037] Figure 3 for Figure 2 Structural profile of cross section A in the middle;

[0038] Figure 4 It is a schematic diagram of the internal structure of a drug supply anesthesia device in the present invention when it is filled with anesthetics;

[0039] Figure 5 It is a schematic diagram of the internal structure of the pump core when it is filled with anesthetic in the present invention;

[0040] Figure 6 It is a schematic diagram of the internal structure of the indicator board in the present invention;

[0041] Figure 7 This is a schematic diagram of the internal structure of a drug supply anesthesia device in the present invention when not in use;

[0042] Figure 8 This is a schematic diagram of the internal structure of the pump core when not in use in the present invention;

[0043] Fig. 9 for Figure 7 The structural profile of the cross section B in the middle;

[0044] Fig.10 It is a structural schematic diagram of the transmission mechanism described in the present invention;

[0045] Fig.11 It is a schematic diagram of the structure of the catheter described in the present invention.

[0046] Among them: 1-pump housing, 2-pump core, 21-fixed sleeve, 22-guide rod, 23-fluid channel, 24-first end cover, 25-second end cover, 3-conduit, 4-elastic capsule tube, 5-elastic capsule valve, 6-first magnet, 7-second magnet, 8-first sliding groove, 9-sliding block, 10-second sliding groove, 11-transmission plate, 12-transmission mechanism, 121-driving tooth, 122-driven tooth, 123-first driving tooth, 124-second Driving teeth, 125-first rack, 126-second rack, 13-screw, 14-rotating sleeve, 15-worm gear, 16-worm wheel, 17-indicator plate, 18-fan-shaped groove, 19-arc scale plate, 20-flow controller, 201-inlet, 202-outlet, 26-three-way valve, 261-middle interface, 262-first branch interface, 263-second branch interface, 27-second conduit, 28-liquidator, 29-clamp closure. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiment is only a piece of embodiment of the present application, rather than a full piece of embodiment. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0048] In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or are the positions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0049] Combine the following Figures 1 to 11 The present invention is described in detail.

[0050] Example 1

[0051] A drug supply anesthesia device, in this embodiment, such as Figures 1 to 10 As shown, it includes a pump housing 1, a pump core 2 and a conduit 3, wherein the pump core 2 is arranged inside the pump housing 1; the outer hoop of the pump core 2 is provided with an elastic bladder tube 4, and the two ends of the elastic bladder tube 4 are sealed and connected to the pump core 2; the conduit 3 passes through the interior of the pump core 2 and is connected to the inner side of the elastic bladder tube 4; a plurality of elastic bladder petals 5 are evenly distributed around the outside of the elastic bladder tube 4, and the inner side of each elastic bladder petal 5 is in close contact with the outer surface of the elastic bladder tube 4 and the two ends are fixedly connected to the pump core 2; a first magnet 6 is provided inside each elastic bladder petal 5, and a second magnet 7 that attracts the first magnet 6 is provided inside the pump core 2.

[0052] With the above technical solution, the catheter 3 is first closed by the clamp 29, and then a dose of anesthetic is added to the pump core 2 with a syringe. The anesthetic enters the elastic bag tube 4 along with the pump core 2 and expands the elastic bag tube 4. After the addition is completed, the clamp 29 is opened to exhaust gas, and the elastic bag tube 4 is connected to the human body after the exhaust is completed. When the elastic bag tube 4 is expanded, the elastic bag valve 5 will also be tightly attached to the outer wall of the elastic bag tube 4 and expand. At this time, the distance between the first magnet 6 and the second magnet 7 becomes larger. At this time, the magnetic force formed between the first magnet 6 and the second magnet 7 is the smallest, and at the same time, the elastic bag tube 4 has a large force to restore the deformation. In the process of gradual infusion of the anesthetic, the elastic bag tube 4 becomes smaller under the action of the deformation recovery force, thereby exerting pressure on the internal anesthetic, so that the anesthetic is pressed into the catheter 3 and infused into the patient's body. At this time, since the elastic bag tube 4 is gradually recovering its shape and becoming smaller, the deformation recovery force will gradually decrease, and thus the pressure applied to the anesthetic will gradually decrease. At the same time, since the elastic medicine bag assembly recovers and becomes smaller, the elastic bag valve 5 will also become smaller and shorter again under the action of the deformation recovery force, thereby reducing the distance between the first magnet 6 and the second magnet 7. Since the second magnet 7 is a fixed part, and the magnetic attraction between the magnets is inversely proportional to the distance between the magnets, the magnetic force between the second magnet 7 and the first magnet 6 will gradually increase, thereby compensating for the gradually decreasing deformation recovery force of the elastic bag tube 4, so that the elastic bag tube 4 maintains a constant pressure on the anesthetic in the process of shrinking. Since the liquid flow rate is proportional to the pressure, the flow rate is proportional to the flow rate, and since the pressure remains constant, the flow rate will not have the adverse effect of decreasing fluctuations.

[0053] In this embodiment, if Figures 1 to 10 As shown, the first magnet 6 is arranged at the midpoint of the elastic capsule valve 5 .

[0054] By adopting the above technical solution, the magnetic attraction force generated between the first magnet 6 and the second magnet 7 can act evenly on the entire elastic bag tube 4, which is helpful to compensate for the gradually reduced deformation recovery force of the elastic bag tube 4.

[0055] In this embodiment, if Figure 1 , Fig.11 As shown, a flow controller 20 is connected in parallel to the conduit 3, a three-way valve 26 is provided on the conduit 3, the conduit 3 is connected to the middle interface 261 of the three-way valve 26, the inlet 201 of the flow controller 20 is connected to the first branch interface 262 of the three-way valve 26, the second branch interface 263 of the three-way valve 26 is connected to the second conduit 27, the end of the second conduit 27 is connected to the human body, and the outlet 202 of the flow controller 20 merges into the second conduit 27.

[0056] By adopting the above technical solution, the device can have two working modes, one of which is: the three-way valve 26 switch is turned to the first branch interface 262 connected to the middle interface 261, at which time the flow controller 20 is started, and the patient can use the patient-controlled analgesia (PCA), that is, when the patient feels pain, he presses the flow controller 20 by himself to inject an appropriate amount of analgesic into the body, thereby achieving an analgesic effect; the other working mode is: the three-way valve 26 switch is turned to the second branch interface 263 connected to the middle interface 261, at which time the flow controller 20 is closed, so that the patient can be continuously supplied with medicine.

[0057] In this embodiment, if Figure 1 , Fig.11 As shown, the catheter 3 is provided with a liquid charger 28 adapted to the syringe, and the second catheter 27 is provided with a clamp 29.

[0058] With the above technical solution, the clamp 29 on the second conduit 27 is first closed to close the entire conduit 3 , and then anesthetic is added to the pump core 2 through the liquid adder 28 .

[0059] Example 2

[0060] In this embodiment, if Figure 1 to Figure 5 , Figure 7 to Figure 9 As shown, different from the above embodiment, the pump core 2 includes a fixed sleeve 21 whose end is fixedly connected to the pump housing 1 through a first end cover 24, and the conduit 3 is connected to the interior of the fixed sleeve 21; a guide rod 22 is slidably connected to the interior of the fixed sleeve 21, and a liquid passage groove 23 is provided on the inner wall of the fixed sleeve 21; the guide rod 22 is provided with a second end cover 25 at the end away from the conduit 3, and the elastic bag tube 4 and the elastic bag flap 5 are both arranged between the first end cover 24 and the second end cover 25, and the two ends of the elastic bag tube 4 and the elastic bag flap 5 are respectively fixedly connected to the first end cover 24 and the second end cover 25; the second magnet 7 is slidably arranged in the fixed sleeve 21.

[0061] By adopting the above technical solution, when a dose of anesthetic is added to the pump core 2 by a syringe, the anesthetic enters the inner cavity of the fixed sleeve 21 through the catheter 3, and then enters the elastic bag tube 4 through the liquid groove 23 to expand the elastic bag tube 4. During the expansion process of the elastic bag tube 4, since the elastic bag tube 4 and the elastic bag flap 5 are arranged between the first end cover 24 and the second end cover 25, and the two ends of the elastic bag tube 4 and the elastic bag flap 5 are respectively fixedly connected to the first end cover 24 and the second end cover 25, when the elastic bag tube 4 expands, the elastic bag tube 4 will drive the second end cover 25 to move. At this time, the elastic bag tube 4 will not only expand in the radial direction, but also expand in the second end cover 25. The elastic bag tube 4 will expand and pull in the axial direction, thereby making full use of the elastic properties of the elastic bag tube 4 to increase the internal volume of the elastic bag tube 4, and while the elastic bag tube 4 is expanding, the guide rod 22 will slide inside the fixed sleeve 21, thereby guiding the elastic bag tube 4 to expand and pull in the axial direction to prevent the expansion and pulling from tilting; and the second magnet 7 is slidably arranged in the fixed sleeve 21, so that the magnetic force generated between the first magnet 6 and the second magnet 7 can make the first magnet 6 cause the second magnet 7 to follow the vertical direction during the movement of the first magnet 6, thereby making the first magnet 6 and the second magnet 7 able to remain constant on the same horizontal plane.

[0062] In this embodiment, if Figure 5 , Figure 8 As shown, different from the above embodiment, the outer side of the fixed sleeve 21 is surrounded by a first sliding groove 8 with the same number as the first magnet 6, and a sliding block 9 is slidably connected in the first sliding groove 8. The sliding direction of the sliding block 9 is the same as the sliding direction of the guide rod 22, and the second magnet 7 is fixedly arranged inside the sliding block 9; the length of the first sliding groove 8 is S1, which satisfies the following formula: S1=h1+l1; wherein h1 is the maximum displacement length of the first magnet 6 in the vertical direction, and l1 is the length of the sliding block 9.

[0063] By adopting the above technical solution, the second magnet 7 can slide along the first sliding groove 8 in the vertical direction along with the sliding block 9 .

[0064] In this embodiment, if Figure 5 , Figure 8As shown, different from the above embodiment, a second sliding groove 10 connected to and parallel to the first sliding groove 8 is provided inside the fixed sleeve 21, a transmission plate 11 fixedly connected to the sliding block 9 is slidably connected in the second sliding groove 10, and a transmission mechanism 12 is provided between the transmission plate 11 and the guide rod 22, so that during the sliding process of the guide rod 22, the first magnet 6 and the second magnet 7 are maintained on the same horizontal plane.

[0065] By adopting the above technical solution, during the process of the elastic bag tube 4 expanding or shrinking, the guide rod 22 will slide inside the fixed sleeve 21. During the sliding process, the guide rod 22 drives the transmission plate 11 to slide through the transmission mechanism 12, and then drives the second magnet 7 to slide along the second sliding groove 10 as the first magnet 6 slides in the vertical direction. Under the influence of the magnetic force generated between the first magnet 6 and the second magnet 7, it is more conducive to maintaining the first magnet 6 and the second magnet 7 on the same horizontal plane.

[0066] In this embodiment, if Figure 5 , Figure 8 , Fig.10 As shown, different from the above embodiment, the transmission mechanism 12 includes a driving tooth 121 and a driven tooth 122 rotatably arranged inside the fixed sleeve 21, and the driving tooth 121 and the driven tooth 122 are meshed with each other; the driving tooth 121 is coaxially fixedly connected with a first driving tooth 123, and the first driving tooth 123 is rotatably arranged inside the fixed sleeve 21 and meshed with a first rack 125 on the guide rod 22; the driven tooth 122 is coaxially fixedly connected with a second driving tooth 124, and the second driving tooth 124 is rotatably arranged inside the fixed sleeve 21 and meshed with a second rack 126 on the transmission plate 11; the gear ratio of the driving tooth 121 to the driven tooth 122 is i, which satisfies the following formula: Among them, h2 is the displacement length of the guide rod 22, h1 is the maximum displacement length of the first magnet 6 in the vertical direction; the first driving tooth 123 and the second driving tooth 124 have the same number of teeth and module; the first rack 125 and the second rack 126 have the same module.

[0067] By adopting the above technical solution, when the guide rod 22 slides, the first meshing tooth is driven to rotate through the first rack 125, thereby causing the active tooth 121 to rotate, and the active tooth 121 rotates and meshes to drive the driven tooth 122 to rotate, and the driven tooth 122 rotates and drives the second meshing tooth to rotate, thereby driving the transmission plate 11 to slide through the second rack 126, thereby driving the second magnet 7 to slide along with the sliding of the first magnet 6 in the vertical direction; and since the gear ratio of the active tooth 121 to the driven tooth 122 is i, Among them, h2 is the displacement length of the guide rod 22, and h1 is the maximum displacement length of the first magnet 6 in the vertical direction. Therefore, during the transmission process, the transmission mechanism 12 can make the second magnet 7 slide on the guide rod 22, and the moving path of the second magnet 7 can be kept the same as the moving path length of the first magnet 6 in the vertical direction, thereby making it easier for the first magnet 6 and the second magnet 7 to maintain the same horizontal plane under the influence of the magnetic force generated between the first magnet 6 and the second magnet 7.

[0068] Example 3

[0069] In this embodiment, if Figure 6 As shown, different from the above embodiment, a screw 13 is provided at the top end of the second end cover 25, and a rotating sleeve 14 is rotatably connected inside the pump casing 1, and the rotating sleeve 14 is threadedly sleeved on the outside of the screw 13; a worm tooth 15 is provided on the outside of the rotating sleeve 14, and a worm wheel 16 meshing with the worm tooth 15 is rotatably connected inside the pump casing 1, and an indicator plate 17 is fixedly connected to the outside of the worm wheel 16, and the indicator plate 17 is movably arranged in a fan-shaped groove 18 inside the pump casing 1, and the outside of the fan-shaped groove 18 is connected to an arc-shaped scale plate 19 made of transparent material.

[0070] By adopting the above technical solution, the scale on the arc-shaped scale plate 19 represents the amount of anesthetic drugs inside the elastic bag tube 4. During the sliding process of the guide rod 22, the relative position of the second end cover 25 in the vertical direction inside the pump housing 1 will change. At this time, the second end cover 25 drives the screw 13 to move, and the screw 13 drives the rotating sleeve 14 to rotate, thereby causing the worm gear 15 on the outside of the rotating sleeve 14 to rotate, thereby driving the worm gear 16 to rotate, and the worm gear 16 drives the indicator plate 17 to rotate along the fan-shaped groove 18, and the outside of the indicator plate 17 points to the corresponding mark on the arc-shaped scale plate 19.

[0071] The working principle of this device:

[0072] First, the catheter 3 is closed by the clamp 29, and then a dose of anesthetic is added to the pump core 2 with a syringe. The anesthetic enters the elastic bag tube 4 along with the pump core 2 and expands the elastic bag tube 4. After the addition is completed, the clamp 29 is opened to exhaust the air, and the elastic bag tube 4 is connected to the human body after the exhaust is completed. When the elastic bag tube 4 is expanded, the elastic bag valve 5 will also be tightly attached to the outer wall of the elastic bag tube 4 and expand. At this time, the distance between the first magnet 6 and the second magnet 7 becomes larger. At this time, the magnetic force formed between the first magnet 6 and the second magnet 7 is the smallest, and at the same time, the elastic bag tube 4 has a large force to restore the deformation. In the process of gradual infusion of the anesthetic, the elastic bag tube 4 becomes smaller under the action of the deformation recovery force, thereby exerting pressure on the internal anesthetic, so that the anesthetic is pressed into the catheter 3 and infused into the patient's body. At this time, due to The elastic bag tube 4 gradually recovers its shape and becomes smaller, so the deformation recovery force will gradually decrease, and thus the pressure applied to the anesthetic gradually decreases. At the same time, since the elastic medicine bag assembly recovers and becomes smaller, the elastic bag valve 5 will also become smaller and shorter again under the action of the deformation recovery force, thereby reducing the distance between the first magnet 6 and the second magnet 7. Since the second magnet 7 is a fixed part, and the magnetic attraction between the magnets is inversely proportional to the distance between the magnets, the magnetic force between the second magnet 7 and the first magnet 6 will gradually increase, thereby compensating for the gradually decreasing deformation recovery force of the elastic bag tube 4, so that the elastic bag tube 4 maintains a constant pressure on the anesthetic in the process of shrinking. Since the liquid flow rate is proportional to the pressure, the flow rate is proportional to the flow rate, and since the pressure remains constant, the flow rate will not have the adverse effect of decreasing fluctuations.

[0073] The above-mentioned embodiments only express the specific implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the protection scope of the present application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the technical solution concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. A drug supply anesthesia device, characterized in that: The invention comprises a pump housing (1), a pump core (2) and a conduit (3), wherein the pump core (2) is arranged inside the pump housing (1); an elastic bag tube (4) is provided on the outer hoop of the pump core (2), and the two ends of the elastic bag tube (4) are sealedly connected to the pump core (2); the conduit (3) is connected to the inner side of the elastic bag tube (4) through the inner side of the pump core (2); a plurality of elastic bag valves (5) are evenly distributed around the outer side of the elastic bag tube (4), the inner side of each elastic bag valve (5) is in close contact with the outer surface of the elastic bag tube (4) and the two ends are fixedly connected to the pump core (2); a first magnet (6) is provided inside each elastic bag valve (5), and a second magnet (7) which attracts the first magnet (6) is provided inside the pump core (2).

2. A drug supply anesthesia device according to claim 1, characterized in that: The first magnet (6) is arranged at the midpoint of the elastic capsule valve (5).

3. The drug supply anesthesia device according to claim 1, characterized in that: The pump core (2) comprises a fixed sleeve (21) whose end is fixedly connected to the pump housing (1) through a first end cover (24); the conduit (3) is communicated with the interior of the fixed sleeve (21); a guide rod (22) is slidably connected to the interior of the fixed sleeve (21); a liquid passage groove (23) is provided on the inner wall of the fixed sleeve (21); the guide rod (22) is provided with a second end cover (25) at the end away from the conduit (3); the elastic bag tube (4) and the elastic bag flap (5) are both arranged between the first end cover (24) and the second end cover (25), and the two ends of the elastic bag tube (4) and the elastic bag flap (5) are respectively fixedly connected to the first end cover (24) and the second end cover (25); the second magnet (7) is slidably arranged in the fixed sleeve (21).

4. A drug supply anesthesia device according to claim 3, characterized in that: The fixed sleeve (21) is surrounded by a first sliding groove (8) whose number is the same as the first magnet (6), and a sliding block (9) is slidably connected in the first sliding groove (8). The sliding direction of the sliding block (9) is the same as the sliding direction of the guide rod (22), and the second magnet (7) is fixedly arranged inside the sliding block (9); the length of the first sliding groove (8) is S1, which satisfies the following formula: S1=h1+l1; Wherein h1 is the displacement length of the first magnet (6) in the vertical direction, and l1 is the length of the sliding block (9).

5. A drug supply anesthesia device according to claim 4, characterized in that: A second sliding groove (10) connected to and parallel to the first sliding groove (8) is provided inside the fixed sleeve (21); a transmission plate (11) fixedly connected to the sliding block (9) is slidably connected inside the second sliding groove (10); a transmission mechanism (12) is provided between the transmission plate (11) and the guide rod (22), so that during the sliding process of the guide rod (22), the first magnet (6) and the second magnet (7) are maintained at the same horizontal plane.

6. The drug supply anesthesia device according to claim 5, characterized in that: The transmission mechanism (12) comprises a driving tooth (121) and a driven tooth (122) which are rotatably arranged inside the fixed sleeve (21), and the driving tooth (121) and the driven tooth (122) are meshed with each other; the driving tooth (121) is coaxially fixedly connected with a first driving tooth (123), and the first driving tooth (123) is rotatably arranged inside the fixed sleeve (21) and meshed with a first rack (125) on the guide rod (22); the driven tooth (122) is coaxially fixedly connected with a second driving tooth (124), and the second driving tooth (124) is rotatably arranged inside the fixed sleeve (21) and meshed with a second rack (126) on the transmission plate (11); the gear ratio between the driving tooth (121) and the driven tooth (122) is u, which satisfies the following formula: Wherein h2 is the displacement length of the guide rod (22), and h1 is the displacement length of the first magnet (6) in the vertical direction; The first drive teeth (123) and the second drive teeth (124) have the same number of teeth and the same module; the first rack (125) and the second rack (126) have the same module.

7. The drug supply anesthesia device according to claim 3, characterized in that: A screw (13) is provided at the top end of the second end cover (25); a rotating sleeve (14) is rotatably connected inside the pump housing (1); the rotating sleeve (14) is threadedly sleeved on the outside of the screw (13); worm gears (15) are provided on the outside of the rotating sleeve (14); a worm wheel (16) meshing with the worm gear (15) is rotatably connected inside the pump housing (1); an indicator plate (17) is fixedly connected to the outside of the worm wheel (16); the indicator plate (17) is movably arranged in a fan-shaped groove (18) inside the pump housing (1); and an arc-shaped scale plate (19) made of a transparent material is connected to the outside of the fan-shaped groove (18).

8. The drug supply anesthesia device according to claim 1, characterized in that: A flow controller (20) is connected in parallel to the conduit, and a three-way valve (26) is provided on the conduit. The conduit is connected to an intermediate interface (261) of the three-way valve (26), an inlet (201) of the flow controller (20) is connected to a first branch interface (262) of the three-way valve (26), a second branch interface (263) of the three-way valve (26) is connected to a second conduit (27), a terminal end of the second conduit (27) is connected to a human body, and an outlet (202) of the flow controller (20) flows into the second conduit (27).

9. The drug supply anesthesia device according to claim 8, characterized in that: The catheter (3) is provided with a liquid charger (28) adapted to the syringe, and the second catheter (27) is provided with a clamp (29).

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