PIEB epidural delivery analgesia pump capable of regulating and controlling local anesthesia drug concentration

Abstract

The invention discloses a PIEB epidural delivery analgesia pump capable of regulating and controlling local anesthetic concentration, which comprises a main shell, a mounting mechanism is arranged on the outer side wall of the main shell, a liquid storage mechanism for storing liquid medicine is arranged in the main shell, and the liquid storage mechanism comprises an anesthetic bag filled with anesthetic and a normal saline bag for reducing the anesthetic concentration. According to the invention, the collision mechanism and the extrusion mechanism are arranged, the extrusion mechanism adopts two extrusion rollers to extrude the medicine mixing bag, and in the extrusion process, the two extrusion rollers tend to rise, and at the moment, liquid medicine in the medicine mixing bag moves upwards after being pressed; the middle part of the medicine mixing bag is accumulated due to the upward liquid medicine, and the collision mechanism can impact the middle part of the medicine mixing bag through oppositely arranged collision heads, so that the liquid medicine is mixed by virtue of rapid impact force, and the homogenization of the liquid medicine is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of analgesia pumps, in particular to a PIEB epidural labor analgesia pump capable of regulating the concentration of local anesthetic drugs. Background Art

[0002] With the increasing demand for labor analgesia among mothers, achieving labor analgesia throughout the entire labor process has become an important goal of obstetrics; however, the pain characteristics of different stages of labor (latent phase, active phase and second stage) vary significantly; latent phase: the pain is mild but lasts for a long time (about 10 hours); active phase and second stage: the pain is severe and intensifies in paroxysmal stages, and lasts for a short time (active phase about 4 hours, second stage about 2 hours); in addition, each mother's physical fitness, pain threshold and psychological state are different, and the demand for epidural local anesthetic concentration is also different.

[0003] A significant shortcoming of current analgesia pump technology is that the concentration of local anesthetics is usually pre-adjusted and fixed for use (such as 0.1% ropivacaine hydrochloride). However, during actual labor, the mother's pain perception often changes over time. This change may be caused by a variety of factors, such as the advancement of labor, individual differences in the mother, or psychological state. Because the traditional PIEB epidural labor analgesia pump cannot flexibly adjust the concentration of local anesthetics according to the progress of labor and pain intensity, overly perfect analgesia during the latent period may affect uterine contractions and delay labor; incomplete analgesia during the active phase and the second stage of labor may affect the progress of labor and maternal non-cooperation, leading to delayed labor and the occurrence of adverse reactions (such as fever, instrumental delivery, conversion to cesarean section, etc.), thereby adversely affecting the mother's delivery experience and maternal and child safety.

[0004] To this end, we propose the PIEB epidural labor analgesia pump, which can adjust the concentration of local anesthetics. It can flexibly and automatically adjust the concentration of epidural local anesthetics according to the individual condition of the mother and changes in the labor process. According to the intensity of pain, it starts from ultra-low concentrations of local anesthetics (such as 0.06% ropivacaine hydrochloride) and gradually increases the concentration to achieve accurate labor analgesia throughout the entire labor process. Summary of the Invention

[0005] The purpose of the present invention is to provide a PIEB epidural labor analgesia pump with adjustable local anesthetic concentration, so as to solve the problem that current epidural labor analgesia cannot flexibly and automatically adjust the concentration of epidural local anesthetic.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a PIEB epidural labor analgesia pump with adjustable local anesthetic concentration, comprising a main shell, an outer wall of the main shell being provided with a mounting mechanism, an interior of the main shell being provided with a liquid storage mechanism for storing liquid medicine, the liquid storage mechanism comprising an anesthetic bag containing anesthetic and a saline bag for reducing the concentration of anesthetic, an interior of the main shell being provided with a mixing bag for mixing liquid medicine below the anesthetic bag and the saline bag, an interior of the main shell being provided with collision mechanisms for homogenizing the liquid medicine at both sides of the mixing bag, and an interior of the main shell being provided with extrusion mechanisms for squeezing the mixed medicine bag at both sides of the mixing bag.

[0007] Preferably: the mounting mechanism includes a sub-shell bolted to the outer wall of the main shell, the outer wall of the main shell is provided with a control panel below the sub-shell, the outer wall of the sub-shell is fixedly connected with observation windows at positions corresponding to the anesthetic bag and the saline bag, a first mounting bin is symmetrically provided inside the main shell, a second mounting bin is provided inside the main shell below the first mounting bin, and the inner walls of the two first mounting bins and the inner walls of the second mounting bin are symmetrically fixedly connected with suspension hooks.

[0008] Preferably: the anesthetic bag, saline bag and mixed medicine bag are fixedly connected to a flexible hanging ring on one side close to the hanging hook, and the anesthetic bag, saline bag and mixed medicine bag are suspended with the hanging hook through the flexible hanging ring, and a third installation compartment is opened inside the main shell below the second installation compartment.

[0009] Preferably: the liquid storage mechanism also includes a sealing film fixedly connected to the bottom of the anesthetic bag and the physiological saline bag, the interior of the main shell is located between the first mounting compartment and the second mounting compartment and is embedded with a puncture seat, the discharge end of the puncture seat is fixedly connected to a first liquid tube, the ends of the two first liquid tubes are connected to the liquid inlet end of the mixed medicine bag, the outer side walls of the first liquid tubes are respectively installed with an electric control valve and a flow sensor, the lower bottom ends of the anesthetic bag and the physiological saline bag are magnetically connected to the inner bottom end of the first mounting compartment.

[0010] Preferably: the collision mechanism includes a fixing plate symmetrically fixedly connected to the bottom end of the second mounting bin, and the two fixing plates are located at both sides of the mixed medicine bag, the fixing plate is fixedly connected to the first driving motor at a side away from the mixed medicine bag, the output end of the first driving motor is fixedly connected to the crank shaft, the end of the crank shaft is fixedly connected to the first bevel gear, the outer wall of the crank shaft is rotatably sleeved on the first bearing frame through a bearing, and the outer wall of the first bearing frame is fixedly connected to the outer wall of the fixing plate, the outer wall of the fixing plate is located on one side of the first bevel gear and is symmetrically fixedly connected to the second bearing frame, the interior of the two second bearing frames is rotatably sleeved with a rotating rod through a bearing, the outer wall of the rotating rod is fixedly connected to the second bevel gear meshing with the first bevel gear, and the outer wall of the rotating rod is located below the second bevel gear and is fixedly connected to the synchronous wheel.

[0011] Preferably: the outer wall of the crank shaft is rotatably sleeved with a rocker arm, and the end of the rocker arm is rotatably sleeved with an impact head, and the extrusion mechanism includes a limit frame fixedly and symmetrically connected to the other outer side wall of the first drive motor, the two limit frames are internally fixedly connected with a sleeve, and the impact head is slidably sleeved on the inner wall of the sleeve, the first drive motor and the limit frame are symmetrically fixedly connected with an auxiliary frame on the same side wall, the two auxiliary frames are internally fixedly connected with a guide shaft, and the first drive motor and the auxiliary frame are symmetrically fixedly connected with a limit plate on the same side wall, the upper top of one of the limit plates is rotatably sleeved with a reciprocating screw through a bearing, the end of the reciprocating screw is fixedly connected with a synchronous wheel, the outer walls of the two synchronous wheels are sleeved with a synchronous belt for transmission, and the guide shaft and the outer wall of the reciprocating screw are both provided with rings, and an extrusion roller is rotatably sleeved between the two rings.

[0012] Preferably, one of the collars is slidably sleeved with the guide shaft, and the other collar is threadedly sleeved with the reciprocating screw rod.

[0013] Preferably: the mixed medicine bag includes a docking seat fixedly connected to the lower bottom end of the mixed medicine bag, a sealing ring is installed on the outer wall of the docking seat, a plug is magnetically connected to the inside of the docking seat, the lower bottom end of the plug is symmetrically fixedly connected to a guide rod, and the plug is slidably connected to the docking seat through the guide rod, and the outer wall of the docking seat is elastically connected to a top seat.

[0014] Preferably: a contact end replacement mechanism for replacing the top seat is provided inside the third mounting bin, the contact end replacement mechanism includes a second drive motor fixedly connected to the bottom end of the third mounting bin, the output end of the second drive motor is fixedly connected to a drive shaft, the end of the drive shaft is fixedly connected to a turntable, the inner bottom end of the third mounting bin is located around the second drive motor and is fixedly connected to a support frame, and the support frame is slidably connected to the turntable, and a number of top seats for replacement are placed on the upper top of the turntable, the inner wall of the top seat is provided with a sealing groove sealed with a sealing ring, a bubble removal grid for eliminating bubbles is placed inside the top seat, and the medicine seeps out through the bubble removal grid, and the inner bottom end of the top seat is fixedly connected to a push column for pushing the plug to move.

[0015] Preferably: a downward pressing mechanism is provided inside the third mounting bin on one side of the second driving motor, and the downward pressing mechanism includes an electric push rod symmetrically fixedly connected to the bottom end of the third mounting bin and located directly below one of the top seats, the telescopic ends of the two electric push rods are fixedly connected to a rising plate, a connecting head is clamped inside the rising plate, the end of the connecting head away from the turntable is fixedly connected to the second liquid pipe, an elastic clamping block is fixedly connected inside the connecting head, and the connecting head is elastically clamped to the top seat through the elastic clamping block.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention is provided with a collision mechanism and an extrusion mechanism, wherein the extrusion mechanism uses two extrusion rollers to extrude the mixed medicine bag. During the extrusion process, the two extrusion rollers will show an upward trend, and at this time, the medicine solution inside the mixed medicine bag will move upward under pressure, and the middle part of the mixed medicine bag will accumulate due to the upward movement of the medicine solution. The collision mechanism can impact the middle part of the mixed medicine bag through the impact heads arranged opposite to each other, and mix the mixed medicine bag with the force of the rapid impact, thereby achieving homogenization of the medicine solution.

[0018] At the same time, a contact end replacement mechanism and a downward pressure mechanism are provided to cooperate with each other, so that the top seat can be replaced after each discharge of the medicine. In the process of mixing the medicine, bubbles are inevitably generated. Therefore, after each discharge of the medicine, the bubble removal grid inside the top seat can effectively remove the bubbles, and each replacement can prevent bubbles from clogging the bubble removal grid, resulting in a slower drainage speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the overall structure of the PIEB epidural labor analgesia pump, which can adjust the concentration of local anesthetic drugs;

[0020] Figure 2 This is a schematic diagram of the overall disassembled structure of the PIEB epidural labor analgesia pump, which can adjust the concentration of local anesthetic drugs;

[0021] Figure 3 This is a schematic diagram of the internal structure of the main housing of the present invention;

[0022] Figure 4 Schematic diagram of the liquid storage mechanism structure of the present invention;

[0023] Figure 5 This is a schematic structural diagram of the collision mechanism of the present invention;

[0024] Figure 6 This is a schematic diagram of the side structure of the fixing plate of the present invention;

[0025] Figure 7 This is a schematic structural diagram of another side of the fixing plate of the present invention;

[0026] Figure 8 This is a schematic structural diagram of the driving part of the collision mechanism of the present invention;

[0027] Figure 9 This is a schematic structural diagram of the contact end replacement mechanism of the present invention;

[0028] Figure 10 This is a schematic diagram of the split structure of the top seat of the present invention;

[0029] Figure 11 It is a schematic diagram of the split structure of the top seat and the docking seat of the present invention.

[0030] In the figure: 1. Main housing; 2. Mounting mechanism; 21. Observation window; 22. Control panel; 23. Sub-housing; 24. First mounting chamber; 25. Second mounting chamber; 26. Third mounting chamber; 27. Suspension hook; 28. Support frame; 3. Liquid storage mechanism; 31. Anesthetic bag; 311. Physiological saline bag; 312. Sealing film; 32. Puncture seat; 33. First liquid pipe; 34. Electric control valve; 35. Flow sensor; 36. Mixed drug bag; 361. Docking seat; 362. Plug; 363. Guide rod; 364. Sealing ring; 37. Flexible hanging ring; 4. Collision mechanism; 41. Fixing plate; 411. First drive motor; 42. Crank shaft; 421. Rocker arm; 422. Impact head; 43. First bearing frame; 44. First bevel gear; 45. Second bearing frame; 46. Rotating rod; 47. Second bevel gear; 48. Synchronous wheel; 49. Synchronous belt; 5. Extrusion mechanism; 51. Limiting frame; 52. Sleeve; 53. Auxiliary frame; 54. Guide shaft; 55. Extrusion roller; 56. Ring; 57. Limiting plate; 58. Reciprocating screw; 6. Contact end replacement mechanism; 61. Second drive motor; 62. Drive shaft; 63. Turntable; 64. Top seat; 641. Sealing groove; 642. Bubble removal grid; 643. Push column; 7. Pressing mechanism; 71. Electric push rod; 72. Rising plate; 73. Connector; 74. Second liquid pipe; 75. Elastic block. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] See also Figure 1 - Figure 4 The present invention provides a technical solution: a PIEB epidural labor analgesia pump with adjustable local anesthetic concentration, comprising a main shell 1, an outer wall of the main shell 1 is provided with a mounting mechanism 2, an interior of the main shell 1 is provided with a liquid storage mechanism 3 for storing liquid medicine, the liquid storage mechanism 3 comprises an anesthetic bag 31 containing anesthetic and a saline bag 311 for reducing the concentration of anesthetic, an interior of the main shell 1 is provided with a mixing bag 36 for mixing liquid medicine below the anesthetic bag 31 and the saline bag 311, an interior of the main shell 1 is provided with collision mechanisms 4 for homogenizing the liquid medicine at both sides of the mixing bag 36, and an interior of the main shell 1 is provided with extrusion mechanisms 5 for squeezing the mixed bag 36 at both sides of the mixing bag 36.

[0033] It should be noted that the liquid storage mechanism 3 arranged inside the main shell 1, including the anesthetic bag 31 and the saline bag 311, can achieve precise control of the anesthetic drug concentration before administration, meet the individualized analgesia needs of different parturients, improve the analgesic effect while reducing drug side effects, and the setting of the collision mechanism 4 ensures that the anesthetic and saline can be fully and evenly mixed in the mixed drug bag 36, avoiding fluctuations in the analgesic effect due to uneven drug concentration, and improving the stability and safety of analgesia. The periodic squeezing of the mixed drug bag 36 by the extrusion mechanism 5 ensures the stable output of the drug solution in the PIEB mode, improves the drug administration efficiency of the analgesic pump, and at the same time reduces the residual drug solution in the pipeline, ensuring the continuity of analgesia. By precisely controlling the drug concentration and the stable drug administration mode, the analgesic pump can continuously provide appropriate analgesic effect, effectively relieve labor pain, improve the delivery experience and comfort of the parturient, and reduce anxiety and fear caused by pain.

[0034] See also Figure 1 - Figure 3The mounting mechanism 2 includes a sub-shell 23 bolted to the outer wall of the main shell 1, and a control panel 22 is provided on the outer wall of the main shell 1 below the sub-shell 23. The outer wall of the sub-shell 23 is fixedly connected with an observation window 21 at the position corresponding to the anesthetic bag 31 and the saline bag 311. A first mounting bin 24 is symmetrically provided inside the main shell 1, and a second mounting bin 25 is provided inside the main shell 1 below the first mounting bin 24. The inner side walls of the two first mounting bins 24 and the inner side walls of the second mounting bin 25 are symmetrically fixedly connected with a hanging hook 27. The anesthetic bag 31, the saline bag 311 and the mixed drug bag 36 are fixedly connected to a flexible hanging ring 37 on one side near the hanging hook 27, and the anesthetic bag 31, the saline bag 311 and the mixed drug bag 36 are all suspended with the hanging hook 27 through the flexible hanging ring 37. A third mounting bin 26 is provided inside the main shell 1 below the second mounting bin 25.

[0035] It should be noted that the auxiliary shell 23 connected to the outer wall of the main shell 1 by bolts realizes the rapid installation and disassembly of the mounting mechanism 2, which is convenient for medical staff to maintain, replace or inspect the internal components of the analgesic pump, thereby improving work efficiency. The observation window 21 set on the outer wall of the auxiliary shell 23 allows medical staff to directly observe the remaining amount of the anesthetic bag 31 and the saline bag 311 without opening the outer shell of the analgesic pump, which is convenient for timely replenishment of the medicine and ensures the continuity of the analgesic process. The cooperation of the hanging hook 27 and the flexible hanging ring 37 realizes the stable suspension of the anesthetic bag 31, the saline bag 311 and the mixed medicine bag 36, avoids the shaking caused by the weight or movement of the medicine, and ensures the stable operation of the analgesic pump.

[0036] See also Figure 1 - Figure 5 The liquid storage mechanism 3 also includes a sealing film 312 fixedly connected to the bottom of the anesthetic bag 31 and the physiological saline bag 311. The interior of the main shell 1 is located between the first mounting chamber 24 and the second mounting chamber 25 and is embedded with a puncture seat 32. The discharge end of the puncture seat 32 is fixedly connected to the first liquid pipe 33. The ends of the two first liquid pipes 33 are connected to the liquid inlet end of the mixed medicine bag 36. The outer walls of the first liquid pipe 33 are respectively installed with an electric control valve 34 and a flow sensor 35. The lower bottom ends of the anesthetic bag 31 and the physiological saline bag 311 are magnetically connected to the inner bottom end of the first mounting chamber 24, and the control panel 22 uses a control circuit to establish a control circuit with the electric control valve 34 and the flow sensor 35.

[0037] It should be noted that the sealing film 312 provided below the anesthetic bag 31 and the saline bag 311 effectively prevents leakage of the drug solution when not in use, thereby ensuring the purity of the drug solution and the safety of the analgesic pump. By installing the electric control valve 34 and the flow sensor 35 on the first liquid pipe 33, precise control of the flow of anesthetics and saline into the mixing bag 36 is achieved, ensuring accurate adjustment of the drug concentration and improving the stability and predictability of the analgesic effect. The model of the flow sensor 35 can be SBG233 (unspecified).

[0038] See also Figure 2 - Figure 8 The collision mechanism 4 includes a fixed plate 41 symmetrically fixedly connected to the bottom end of the second mounting bin 25, and the two fixed plates 41 are located on both sides of the mixed medicine bag 36, and the fixed plate 41 is fixedly connected to the first driving motor 411 at the side away from the mixed medicine bag 36, and the output end of the first driving motor 411 is fixedly connected to the crank shaft 42, and the end of the crank shaft 42 is fixedly connected to the first bevel gear 44, and the outer wall of the crank shaft 42 is rotatably sleeved with the first bearing frame 43 through a bearing, and the outer wall of the first bearing frame 43 is fixedly connected to the outer wall of the fixed plate 41, and the outer wall of the fixed plate 41 is symmetrically fixedly connected to the second bearing frame 45 at one side of the first bevel gear 44, and the interior of the two second bearing frames 45 is rotatably sleeved with a rotating rod 46 through a bearing, and the outer wall of the rotating rod 46 is fixedly connected to the second bevel gear 47 meshing with the first bevel gear 44 for transmission, and the outer wall of the rotating rod 46 is located below the second bevel gear 47 and is fixedly connected to the synchronous wheel 48.

[0039] It should be noted that the first drive motor 411 drives the rotating rod 46 and the synchronous wheel 48 thereon to rotate through the transmission of the crank shaft 42, the first bevel gear 44 and the second bevel gear 47, thereby realizing the collision of the medicine in the mixed medicine bag 36, ensuring that the anesthetic and saline are fully and evenly mixed in a short time, and improving the working efficiency of the analgesic pump. The design of the collision mechanism 4 adopts a symmetrical layout. The two fixed plates 41 and the power part thereon ensure that the medicine in the mixed medicine bag 36 is evenly stressed, avoiding the problems of uneven mixing or excessive local concentration, and ensuring the stability and consistency of the medicine output by the analgesic pump.

[0040] See also Figure 2 - Figure 8The outer wall of the crank shaft 42 is rotatably connected with a rocker arm 421, and the end of the rocker arm 421 is rotatably connected with a striking head 422. The extrusion mechanism 5 includes a limit frame 51 fixedly and symmetrically connected to the other outer side wall of the first drive motor 411. The two limit frames 51 are internally fixedly connected with a sleeve 52. The striking head 422 is slidably connected to the inner wall of the sleeve 52. The first drive motor 411 and the limit frame 51 are symmetrically fixedly connected with an auxiliary frame 53 on the same side wall. The two auxiliary frames 53 are internally fixedly connected with a guide shaft 54. The first drive motor 411 A limit plate 57 is symmetrically fixedly connected to the same side wall of the auxiliary frame 53, and a reciprocating screw 58 is rotatably sleeved on the upper top of one of the limit plates 57 through a bearing. The end of the reciprocating screw 58 is fixedly connected to a synchronous wheel 48, and the outer walls of the two synchronous wheels 48 are sleeved with a synchronous belt 49 for transmission. The outer walls of the guide shaft 54 and the reciprocating screw 58 are both provided with a ring 56, and an extrusion roller 55 is rotatably sleeved between the two rings 56. One of the rings 56 is slidably sleeved on the guide shaft 54, and the other ring 56 is threadedly sleeved on the reciprocating screw 58.

[0041] It should be noted that the rocker arm 421 and the impact head 422 on the crank shaft 42 not only participate in the drug-liquid mixing process of the collision mechanism 4, but also realize the periodic extrusion of the mixed drug bag 36 through the coordinated action with the extrusion mechanism 5, effectively promoting the uniform mixing and stable extrusion of the drug liquid, and improving the working efficiency of the analgesic pump. Through the transmission of the reciprocating screw 58 and the synchronous wheel 48 and the synchronous belt 49, and the sliding and threaded connection design of the ring 56 on the guide shaft 54 and the reciprocating screw 58, the position and pressure of the extrusion roller 55 are precisely controlled, ensuring the uniformity and continuity of the drug liquid in the mixed drug bag 36 during the extrusion process, avoiding the problems of drug liquid waste and uneven concentration. The first drive motor 411 not only drives the rotation of the collision mechanism 4, but also indirectly controls the reciprocating motion of the extrusion mechanism 5 through structures such as the limit frame 51 and the sleeve 52, realizing the synchronization and coordination of the collision and extrusion actions, and ensuring the stability and consistency of the drug liquid output by the analgesic pump.

[0042] See also Figure 2 - Figure 8 The medicine mixing bag 36 includes a docking seat 361 fixedly connected to the lower bottom end of the medicine mixing bag 36, a sealing ring 364 is installed on the outer wall of the docking seat 361, a plug 362 is magnetically connected to the inside of the docking seat 361, and a guide rod 363 is symmetrically fixedly connected to the lower bottom end of the plug 362, and the plug 362 is slidably connected to the docking seat 361 through the guide rod 363, and the outer wall of the docking seat 361 is elastically connected to the top seat 64.

[0043] It should be noted that the sealing ring 364 installed on the outer wall of the docking seat 361, and the magnetic connection and sliding sleeve design between the plug 362 and the docking seat 361, together ensure the sealing performance of the mixed medicine bag 36 during the storage and extrusion of the medicine liquid, effectively prevent the leakage of the medicine liquid, and ensure the safe operation of the analgesic pump. The sliding sleeve design of the plug 362 and the docking seat 361 through the guide rod 363 makes the opening and closing operations of the plug smoother and more stable, reduces the difficulty of operation, and improves work efficiency. The top seat 64 elastically sleeved on the outer wall of the docking seat 361 not only provides additional support and fixation for the mixed medicine bag 36, but also enhances the stability of the overall structure, avoids deformation or damage caused by the weight of the medicine liquid or external pressure, and extends the service life of the analgesic pump.

[0044] See also Figure 9 - Figure 11 , a contact end replacement mechanism 6 for replacing the top seat 64 is provided inside the third mounting chamber 26, and the contact end replacement mechanism 6 includes a second drive motor 61 fixedly connected to the inner bottom end of the third mounting chamber 26, and the output end of the second drive motor 61 is fixedly connected to the drive shaft 62, and the end of the drive shaft 62 is fixedly connected to the turntable 63, and the inner bottom end of the third mounting chamber 26 is located around the second drive motor 61 and is fixedly connected to the support frame 28, and the support frame 28 is slidably connected to the turntable 63, and a number of top seats 64 for replacement are placed on the upper top of the turntable 63, and the inner wall of the top seat 64 is provided with a sealing groove 641 sealed with the sealing ring 364, and a bubble removal grid 642 for eliminating bubbles is placed inside the top seat 64, and the liquid medicine seeps out through the bubble removal grid 642, and the inner bottom end of the top seat 64 is fixedly connected to a push column 643 for pushing the plug 362 to move.

[0045] It should be noted that the turntable 63 is driven to rotate by the second drive motor 61, thereby realizing the automatic replacement of the top seat 64, reducing the labor intensity of medical staff in manually replacing the top seat and improving work efficiency. At the same time, the sliding sleeve design of the turntable 63 and the support frame 28 ensures the stability and accuracy of the top seat 64 during the replacement process. The sealing connection design of the sealing groove 641 and the sealing ring 364 opened on the inner wall of the top seat 64 effectively prevents the leakage of the medicine during the replacement of the top seat, thereby ensuring the safe operation of the analgesic pump. In addition, the setting of the bubble removal grid 642 can eliminate bubbles in the medicine, ensure that the output medicine is purer, and improve the analgesic effect. The push column 643 fixedly connected to the bottom end of the top seat 64 can push the plug 362 to move while replacing the top seat, realizing the automatic opening and closing of the plug, further simplifying the operation process and improving work efficiency. The contact end replacement mechanism 6 not only realizes the automatic replacement of the top seat, but also integrates multiple functions such as sealing, debubbling and pushing columns into one, making the overall structure more compact and reducing manufacturing costs and maintenance difficulties.

[0046] See also Figure 9 - Figure 11 A downward pressing mechanism 7 is provided inside the third mounting chamber 26 on one side of the second drive motor 61. The downward pressing mechanism 7 includes an electric push rod 71 symmetrically fixedly connected to the bottom end of the third mounting chamber 26 and located directly below one of the top seats 64. The telescopic ends of the two electric push rods 71 are fixedly connected to a rising plate 72. A connecting head 73 is clamped inside the rising plate 72. The end of the connecting head 73 away from the turntable 63 is fixedly connected to the second liquid pipe 74. An elastic clamping block 75 is fixedly connected to the inside of the connecting head 73, and the connecting head 73 is elastically clamped with the top seat 64 through the elastic clamping block 75.

[0047] It should be noted that the pressing mechanism 7 drives the rising plate 72 to move through the electric push rod 71, so that the connecting head 73 can be accurately aligned and clamped on the top seat 64, realizing stable positioning and fixation of the top seat. The design of the elastic clamping block 75 enhances the reliability and sealing of the connection, avoiding leakage of the drug during the transmission process. The elastic clamping design between the connecting head 73 and the top seat 64 enables medical staff to quickly connect or disconnect the drug transmission path as needed, realizing flexible control of drug transmission, which not only facilitates the replacement of the top seat 64 and maintenance, but also improves the working efficiency and adaptability of the analgesic pump. The automatic control of the electric push rod 71 enables the pressing mechanism 7 to automatically perform pressing and releasing actions as needed, reducing the operating intensity of medical staff and improving work efficiency.

[0048] Working principle: When it is necessary to mix anesthetics and saline, the concentration of anesthetics is first preset through the control panel 22. The system automatically adjusts the opening degree of the electric control valve 34 according to the preset value, and controls the liquid in the anesthetic bag 31 and the saline bag 311 to flow into the mixed medicine bag 36 in a certain proportion. At this time, the extrusion mechanism 5 is started, and the first drive motor 411 drives the crank shaft 42 to rotate. The crank shaft 42 not only drives the collision mechanism 4 through the rocker arm 421 and the impact head 422, but also drives the synchronous wheel 48, the synchronous belt 49 and the reciprocating screw 58, so that the two extrusion rollers 55, under the guidance of the guide shaft 54, exert a periodic pressure on the mixed medicine bag 36. The extrusion action of the extrusion roller 55 causes the liquid medicine in the mixed medicine bag 36 to be pressurized and forced to spread to the surroundings, especially to form an accumulation in the middle of the mixed medicine bag 36. At the same time, the impact head 422 in the collision mechanism 4, driven by the crank shaft 42, quickly impacts the middle of the mixed medicine bag 36 at a high frequency. This rapid impact force not only promotes the violent disturbance of the liquid medicine, but also accelerates the intermolecular diffusion of the anesthetic and the physiological saline, thereby achieving uniform mixing of the liquid medicine. The impact head 422 takes into account the pressurized state of the liquid medicine, ensuring that the impact force can achieve the mixing effect without damaging the mixed medicine bag 36. At the bottom, the sealed storage of the medicine liquid is achieved through the combination of the docking seat 361 and the plug 362. When the medicine liquid needs to be discharged, the contact end replacement mechanism 6 is started, and the second drive motor 61 drives the turntable 63 to rotate, so that a new top seat 64 equipped with a bubble removal grid 642 moves to the bottom of the docking seat 361. The design of the bubble removal grid 642 can effectively capture and remove bubbles in the medicine liquid, ensuring that the discharged medicine liquid is pure and bubble-free. At this time, the downward pressure mechanism 7 plays a role, and the electric push rod 71 pushes the rising plate 72 to rise. The connector 73 on the rising plate 72 is elastically connected with the top seat 64 through the elastic block 75, ensuring the stability of the connection. Seal, then, the push pin 643 in the top seat 64 pushes the plug 362 to move upward, opening the medicine discharge channel. Since the bubble removal grid 642 is pre-installed inside the top seat 64, the medicine will be filtered by the grid during the discharge process, and the bubbles are effectively removed. Each time the medicine is discharged, the contact end replacement mechanism 6 will automatically replace a new top seat 64, avoiding the problem of blockage of the bubble removal grid 642 caused by long-term accumulation of bubbles, ensuring the continuous and efficient operation of the analgesic pump, the magnetic connection design between the top seat 64 and the docking seat 361, and the sliding sleeve of the guide rod 363, not only ensure the convenience of connection, but also ensure the reliability of sealing.

[0049] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0050] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A PIEB epidural labor analgesia pump with adjustable local anesthetic concentration, comprising a main housing (1), characterized in that: The outer wall of the main shell (1) is provided with a mounting mechanism (2), and the interior of the main shell (1) is provided with a liquid storage mechanism (3) for storing liquid medicine, and the liquid storage mechanism (3) includes an anesthetic bag (31) containing anesthetics and a physiological saline bag (311) for reducing the concentration of the anesthetics. The interior of the main shell (1) is provided with a mixing bag (36) for mixing liquid medicine below the anesthetic bag (31) and the physiological saline bag (311). The interior of the main shell (1) is provided with collision mechanisms (4) for homogenizing liquid medicine at both sides of the mixing bag (36). The interior of the main shell (1) is provided with extrusion mechanisms (5) for extruding the mixing bag (36) at both sides of the mixing bag (36).

2. The PIEB epidural labor analgesia pump with adjustable local anesthetic concentration according to claim 1, characterized in that: The mounting mechanism (2) comprises a sub-shell (23) bolted to the outer wall of the main shell (1); a control panel (22) is provided on the outer wall of the main shell (1) below the sub-shell (23); observation windows (21) are fixedly connected to the outer wall of the sub-shell (23) at positions corresponding to the anesthetic bag (31) and the physiological saline bag (311); a first mounting chamber (24) is symmetrically provided inside the main shell (1); a second mounting chamber (25) is provided inside the main shell (1) below the first mounting chamber (24); and hanging hooks (27) are symmetrically fixedly connected to the inner walls of the first mounting chamber (24) and the inner walls of the second mounting chamber (25).

3. The PIEB epidural labor analgesia pump with adjustable local anesthetic concentration according to claim 2, characterized in that: The anesthetic bag (31), the physiological saline bag (311) and the mixed medicine bag (36) are all fixedly connected to a flexible hanging ring (37) on one side close to the hanging hook (27), and the anesthetic bag (31), the physiological saline bag (311) and the mixed medicine bag (36) are all suspended with the hanging hook (27) through the flexible hanging ring (37), and a third installation compartment (26) is provided inside the main shell (1) below the second installation compartment (25).

4. The PIEB epidural labor analgesia pump with adjustable local anesthetic concentration according to claim 1, characterized in that: The liquid storage mechanism (3) further comprises a sealing film (312) fixedly connected to the bottom of the anesthetic bag (31) and the physiological saline bag (311); a puncture seat (32) is embedded and connected between the first mounting chamber (24) and the second mounting chamber (25) inside the main shell (1); a discharge end of the puncture seat (32) is fixedly connected to a first liquid pipe (33); the ends of the two first liquid pipes (33) are connected to the liquid inlet end of the mixed medicine bag (36); an electric control valve (34) and a flow sensor (35) are respectively installed on the outer side wall of the first liquid pipe (33); the lower bottom ends of the anesthetic bag (31) and the physiological saline bag (311) are magnetically connected to the inner bottom end of the first mounting chamber (24).

5. The PIEB epidural labor analgesia pump with adjustable local anesthetic concentration according to claim 2, characterized in that: The collision mechanism (4) includes a fixed plate (41) symmetrically fixedly connected to the bottom end of the second installation chamber (25), and the two fixed plates (41) are located on both sides of the mixed medicine bag (36). The fixed plate (41) is fixedly connected to a first drive motor (411) at a side away from the mixed medicine bag (36). The output end of the first drive motor (411) is fixedly connected to a crank shaft (42), and the end of the crank shaft (42) is fixedly connected to a first bevel gear (44). The outer wall of the crank shaft (42) is rotatably sleeved with a first bearing frame (43) through a bearing. The outer wall of the first bearing frame (43) is fixedly connected to the outer wall of the fixed plate (41); the outer wall of the fixed plate (41) is symmetrically fixedly connected to the second bearing frame (45) at one side of the first bevel gear (44); the interiors of the two second bearing frames (45) are rotatably sleeved with a rotating rod (46) through a bearing; the outer wall of the rotating rod (46) is fixedly connected to the second bevel gear (47) meshing with the first bevel gear (44); the outer wall of the rotating rod (46) is located below the second bevel gear (47) and is fixedly connected to a synchronous wheel (48).

6. The PIEB epidural labor analgesia pump with adjustable local anesthetic concentration according to claim 5, characterized in that: The outer wall of the crankshaft (42) is rotatably connected to a rocker arm (421), and the end of the rocker arm (421) is rotatably connected to a striking head (422). The extrusion mechanism (5) includes a limit frame (51) fixedly and symmetrically connected to the other outer side wall of the first drive motor (411), the interiors of the two limit frames (51) are fixedly connected to a sleeve (52), and the striking head (422) is slidably connected to the inner wall of the sleeve (52). The first drive motor (411) and the limit frame (51) are symmetrically and fixedly connected to an auxiliary frame (53) on the same side wall. The interiors of the two auxiliary frames (53) are fixedly and symmetrically connected to the inner wall of the sleeve (52). A guide shaft (54) is fixedly connected, and a limiting plate (57) is symmetrically fixedly connected to the same side wall of the first drive motor (411) and the auxiliary frame (53), and the upper top of one of the limiting plates (57) is rotatably sleeved with a reciprocating screw (58) through a bearing, and the end of the reciprocating screw (58) is fixedly connected with a synchronous wheel (48), and the outer walls of the two synchronous wheels (48) are sleeved with a synchronous belt (49) for transmission, and the outer walls of the guide shaft (54) and the reciprocating screw (58) are both provided with a ring (56), and an extrusion roller (55) is rotatably sleeved between the two rings (56).

7. The PIEB epidural labor analgesia pump with adjustable local anesthetic concentration according to claim 6, characterized in that: One of the collars (56) is slidably sleeved with the guide shaft (54), and the other collar (56) is threadably sleeved with the reciprocating screw rod (58).

8. The PIEB epidural labor analgesia pump with adjustable local anesthetic concentration according to claim 3, characterized in that: The medicine mixing bag (36) includes a docking seat (361) fixedly connected to the lower bottom end of the medicine mixing bag (36), a sealing ring (364) is installed on the outer wall of the docking seat (361), a plug (362) is magnetically connected to the inside of the docking seat (361), a guide rod (363) is symmetrically fixedly connected to the lower bottom end of the plug (362), and the plug (362) is slidably sleeved with the docking seat (361) through the guide rod (363), and the outer wall of the docking seat (361) is elastically sleeved with a top seat (64).

9. The PIEB epidural labor analgesia pump capable of adjusting the concentration of local anesthetic according to claim 8, characterized in that: A contact end replacement mechanism (6) for replacing the top seat (64) is provided inside the third installation chamber (26), and the contact end replacement mechanism (6) includes a second drive motor (61) fixedly connected to the bottom end of the third installation chamber (26), the output end of the second drive motor (61) is fixedly connected to a drive shaft (62), the end of the drive shaft (62) is fixedly connected to a turntable (63), and the bottom end of the third installation chamber (26) is fixedly connected to a support frame (2 8), and the support frame (28) is slidably connected to the turntable (63), and a plurality of top seats (64) for replacement are placed on the top of the turntable (63), and the inner wall of the top seat (64) is provided with a sealing groove (641) sealed with the sealing ring (364), and a bubble removal grid (642) for eliminating bubbles is placed inside the top seat (64), and the liquid medicine seeps out through the bubble removal grid (642), and the inner bottom end of the top seat (64) is fixedly connected with a push column (643) for pushing the plug (362) to move.

10. The PIEB epidural labor analgesia pump with adjustable local anesthetic concentration according to claim 9, characterized in that: A pressing mechanism (7) is provided inside the third installation chamber (26) at one side of the second drive motor (61), and the pressing mechanism (7) comprises an electric push rod (71) symmetrically fixedly connected to the bottom end of the third installation chamber (26) and located directly below one of the top seats (64). The telescopic ends of the two electric push rods (71) are fixedly connected to a rising plate (72), and a connector (73) is clamped inside the rising plate (72). The end of the connector (73) away from the turntable (63) is fixedly connected to the second liquid pipe (74), and the interior of the connector (73) is fixedly connected to an elastic clamping block (75), and the connector (73) is elastically clamped to the top seat (64) through the elastic clamping block (75).

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