CN116531605A

CN116531605A - Micro-infusion pump

Info

Publication number: CN116531605A
Application number: CN202310526445.2A
Authority: CN
Inventors: 李博然
Original assignee: Xuanwu Hospital
Current assignee: Xuanwu Hospital
Priority date: 2023-05-10
Filing date: 2023-05-10
Publication date: 2023-08-04

Abstract

The invention relates to a micro infusion pump, at least comprising: a control body for micro-fluid delivery. Further comprises: the outer arm can be rotated to adjust the infusion direction of the micro infusion pump. The control main body is provided with a first buckle and a caulking groove for fixing the rotatable outer arm. The rotatable outer arm is provided with a rotating component and is connected with the caulking groove, so that the rotatable outer arm can rotate to change the direction under the condition that the micro infusion pump needs to change the infusion direction. When the infusion pump is used, the infusion direction can be flexibly adjusted according to the position of an applicable object, and the risks of bending, traction transition, difficult straightening and the like of the infusion pump tube are reduced, so that the infusion pump tube is straightened, and the liquid medicine is accurately, uniformly and continuously pumped into a patient. Compared with the micropump in the prior art, the infusion direction of the micropump can be changed through the rotatable outer arm, so that the blockage of a pipeline or other clinical risks caused by bending can be prevented.

Description

Micro-infusion pump

Technical Field

The invention relates to the technical field of medical appliances, in particular to a micro infusion pump.

Background

The micro infusion pump (micro pump for short) is a novel pumping instrument, and pumps a small amount of liquid medicine into the body accurately, uniformly and continuously, so that the operation is convenient, the timing and the quantification are realized, the concentration and the speed of the medicine can be regulated at any time according to the condition requirement, and the medicine can keep the effective blood concentration in the body. The method for controlling the infusion by using the micropump is widely applied to scenes such as an intensive care unit, an operating room and the like, can improve the working efficiency of medical staff, and is accurately, safely and effectively matched with the operation and rescue of doctors.

The infusion direction of the conventional micro infusion pump in clinic is mostly from right to left for infusion. In some cases, the infusion direction of the micro pump is often opposite to the direction of the venous access of the patient, for example, the patient is on the right side of the micro pump, and the infusion direction of the micro pump is from right to left, so that the micro infusion pump tube needs to be bent back reversely for a distance to enable the infusion direction of the micro pump to be the same as the direction of the venous access of the patient. Although the problem of different directions can be solved by changing the position of the micropump, in many cases of infusion, the position of the micropump cannot be changed usually due to the surgical position and habit problems of a patient and additional limitations of other conditions, so that the infusion pump tube is bent reversely to cause inconvenience in the infusion process to a certain extent, and the infusion pump tube is pulled too much with little carelessness. The excessive traction can lead the conduit to be folded on one hand so that the liquid can not be infused at a constant speed, and the pump pipe is pulled to fall off on the other hand; meanwhile, the length of the return bend can shorten the length of the pump tube, so that the transfusion distance is insufficient; when using multiple micropumps, reverse tortuous pumps are also inconvenient to manage. Even though this is solved by extending the infusion pump tube, the extended tubing on the one hand causes waste of the liquid medicine and on the other hand increases the risk of kinking of the tubing. There is a certain clinical risk for all of the above reasons.

The present invention is directed to an improved micropump that solves the problems associated with the conventional micropump described above.

Chinese patent CN 103191495B discloses a method of ejecting liquid in a syringe with a micropump and a micropump holder device. The method for injecting the liquid in the syringe by using the micropump comprises the following steps: firstly, sucking liquid into the injector by using the injector, then installing the injector for sucking the liquid on the micro pump, connecting a pipeline for conveying the liquid, setting parameters of the micro pump according to the requirement, and finally starting the micro pump; continuing to draw air into the syringe after drawing liquid into the syringe with the syringe; the micropump is vertically arranged through a bracket; the injection hole of the injector faces downwards. The micro pump support device comprises a base and a support frame connected with the base, wherein the support frame is provided with a cross rod positioned above the base, and a plurality of fixing devices for fixing the micro pump are distributed on the cross rod. The method and the device of the patent can not generate the phenomenon of liquid time-out, avoid the waste of liquid and reduce the labor intensity of medical staff. However, the disadvantage of this patent is that the direction of delivery of the micropump cannot be changed, resulting in the need to adjust the direction of infusion of the micropump by bending the catheter when the direction of the micropump cannot be changed. Furthermore, this patent does not regulate the mixing fluid.

Chinese patent CN 104815369B discloses an ICU department microinjection pump device, which belongs to the technical field of medical apparatus and instruments. The utility model provides a with ICU branch of academic or vocational study microinjection pump device, including the device main part, step motor device and liquid medicine flow control case, be equipped with the alarm lamp at device main part front side, the alarm lamp right side is equipped with the pipeline suggestion and blocks the button, injection stop button and dose prompt key, dose prompt key right side is equipped with the information display screen, be equipped with the start button between information display screen and the dose prompt key, the start button right side is equipped with dose selection key, be equipped with the power cord mouth in the device main part, the power cord mouth is connected with the power cord, power cord and plug connection, device main part downside is equipped with injection pressure support frame, injection pressure support frame is connected with injection pressure device, injection pressure device inside is equipped with injection pressure case. The disadvantage of this patent is that the direction of delivery of the micropump cannot be changed, so that the micropump is prone to risks such as bending, kinking, traction transition, difficulty in straightening, etc., and when the micropump is used for slow administration, the needle piston may creep and flow rate fluctuation may be caused, i.e. the needle is in a flow rate stop state during part of the time, thereby causing needle back blood and coagulation blockage.

Furthermore, there are differences in one aspect due to understanding to those skilled in the art; on the other hand, since the applicant has studied a lot of documents and patents while making the present invention, the text is not limited to details and contents of all but it is by no means the present invention does not have these prior art features, but the present invention has all the prior art features, and the applicant remains in the background art to which the right of the related prior art is added.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides a micro infusion pump, which at least comprises: a control body for micro-fluid delivery. Further comprises: the outer arm can be rotated and is used for adjusting the infusion direction of the micro infusion pump. Preferably, the control main body is provided with a first buckle and a caulking groove for fixing the rotatable outer arm. The rotatable outer arm is provided with a rotating component and is connected with the caulking groove, so that the rotatable outer arm can rotate to change the direction under the condition that the micro infusion pump needs to change the infusion direction. Compared with the prior art, the invention has the beneficial effects that: when the infusion pump is used, the infusion direction can be flexibly adjusted according to the position of an applicable object, risks such as bending, traction transition and difficult straightening of an infusion pump tube are reduced, and meanwhile, the panel module of the micro pump is of a key structure and is not in touch screen so as to reduce the situations that the infusion pump tube is in fault and the touch screen is out of order. The telescopic component connected with the rotatable outer arm is a mechanical mechanism, is firm and durable, has a limiting clamping position, can be adjusted only at +180 DEG to-180 DEG, and reduces damage caused by transitional rotation.

According to a preferred embodiment, the rotating assembly comprises: the spring is used for connecting the rotatable outer arm, the spring base is used for fixing the spring, and the connecting rod is rotationally connected with the rotatable outer arm. The connecting rod is connected with a spring to limit the rotatable outer arm in the first buckle, and the spring is stretched under the condition that the rotatable outer arm is separated from the first buckle; after the rotatable outer arm changes orientation, the spring pulls the connecting rod to indirectly pull the rotatable outer arm to secure the rotatable outer arm into the first clasp. The invention ensures that the infusion direction of the micro infusion pump faces to the patient, the infusion pump tube is more smooth, and the risk of bending, pulling and falling off is reduced, so that the liquid medicine is accurately, uniformly and continuously pumped into the patient.

According to a preferred embodiment, the rotatable outer arm comprises a telescopic assembly, a booster and an adjusting member, the booster being used for pushing a syringe arranged on the recess for microinjection. The control main body is internally provided with a state detection mechanism for detecting whether the injector is installed or not, and when the state detection mechanism detects that the injector is installed, the control main body drives and controls the boosting piece to push the injector. In the present invention, the state of the syringe is detected by the state detecting means. When the state is detected to be normal, the control main body carries out motor driving control on the boosting piece, so that useless injection pushing can be eliminated as far as possible, and micro transfusion can be accurately carried out.

According to a preferred embodiment, the rotatable outer arm is provided with a second catch for securing the syringe, which second catch is turned around to secure the syringe to the recess of the rotatable outer arm. Compared with the micropump in the prior art, the infusion direction of the micropump can be changed through the rotatable outer arm, so that the blockage of a pipeline or other clinical risks caused by bending can be prevented. The device claimed by the invention has wide application value.

According to a preferred embodiment, the microinfusion pump comprises a first rotatable outer arm and a second rotatable outer arm, in which at least two syringes are arranged, respectively, and the confluence of the microinfluid is performed by a confluence member. The two rotatable outer arms can be used for mixing and proportioning the input medical fluid, and automatic proportioning is carried out through the micro infusion pump, so that different types of fluids are mixed in real time in the long-time fluid injection process, and the problem of drug effect change is avoided.

According to a preferred embodiment, the converging member comprises a first conduit and a second conduit, the junction of which is provided with a telescopic tube. The telescopic pipe can be converted from a first telescopic state to a second telescopic state so as to change the volume of the trace fluid in the confluence piece. The telescopic tube provided by the invention can also solve the problem of flow speed fluctuation of the micro infusion pump. When the micro infusion pump is used for slow administration, the needle piston can creep and flow rate fluctuation can be caused, namely, the needle is in a flow rate stop state during part of the time, so that the needle is in blood return and coagulation blockage. In contrast, when the micro infusion pump carries out slow drug delivery to cause creeping of the needle tube piston and fluctuation of the flow rate, the telescopic tube provided by the invention can realize flow rate supplement in a flow rate stopping state through changing the second telescopic state towards the first telescopic state, so that the injection of medical fluid has continuity, and the problems of blood clot, blood return and the like are solved.

According to a preferred embodiment, the joining element is provided with a restrictor in a downstream position compared to the telescopic tube, which restrictor is able to adjust the tightness of the joining element, wherein the restrictor does not restrict the flow of trace fluid through the joining element in the open state of the restrictor and wherein the trace fluid fed by at least two syringes flows into the telescopic tube in the closed state of the restrictor.

According to a preferred embodiment, the limiter is in an open state, at least two syringes being preloaded with the micro-fluid to be mixed, prior to the micro-fluid injection into the patient. The restrictor changes to a closed state restricting the flow of trace fluid to the patient. The control body controls actuation of the booster such that at least two micro-fluids of different flows flow out of the syringe and into the first and/or second conduit. The restrictor restricts the flow of trace fluid toward the patient such that trace fluid from at least two syringes flows into the extended bellows. The matching of the telescopic tube and the limiter can also be used for filling a preset delivery catheter, so that the problem of inaccurate dosage of injected medical fluid caused by overlong catheters is prevented. Particularly in the case of small-scale medical fluid injection, it is a very important technical means for accurate control of medical fluids. For example, when it is desired to infuse a patient with medical fluid at a rate of 10ml/h, the void in the infusion catheter is such that the rate during the first half hour may be only 9ml/h, which undoubtedly affects the infusion of patient medical fluid.

According to a preferred embodiment, the bellows contains a micro-fluid pushed out of at least two syringes and acts as a mixing chamber for the micro-fluid. The telescoping tube maintains the second telescoping state and has no tendency to return to the first telescoping state.

According to a preferred embodiment, the plurality of syringes provided with the plurality of rotatable outer arms are provided with a corresponding plurality of limiters, such that the control body controls the open and closed state of each limiter. The control body is further configured to: controlling the flow of a first fluid into the junction in a first time series and quantitatively delivering a second fluid in a second time series; controlling the addition of the first fluid and/or the second fluid based on a number of limiters provided for a number of conduits, stacking the first fluid and/or the second fluid on a bellows for initial mixing during the first time sequence, and adjusting a mixing ratio of the first fluid and the second fluid to a predetermined value during the second time sequence. In the micro infusion pump, a plurality of rotatable outer arms and a plurality of corresponding syringes form an infusion pipeline structure. The tubing structure has a plurality of fluid conduits and is miscible to form a trace of medical fluid. The arrangement of the limiter between the plurality of syringes can also control the concentration of the formed trace medical fluid, and particularly, for medical fluids which need high-rate mixing and dilution, how to accurately mix is a problem which is continuously solved. The multi-stage structure type pipeline structure of the invention can convey very small amount of trace fluid, and the telescopic pipe is utilized for fluid retention and blood return supplement.

Drawings

FIG. 1 is a simplified schematic structural diagram of a control body according to a preferred embodiment of the present invention;

FIG. 2 is a simplified schematic structural view of a rotatable outer arm according to a preferred embodiment of the present invention;

FIG. 3 is a simplified schematic diagram of a micropump according to a preferred embodiment of the present invention;

FIG. 4 is a simplified structural side view of a control body of a preferred embodiment provided by the present invention;

FIG. 5 is a simplified structural side view of a rotatable outer arm connecting spring and spring mount of a preferred embodiment provided by the present invention;

FIG. 6 is a simplified side view of a control body and rotatable outer arm combination according to a preferred embodiment of the present invention;

fig. 7 is a schematic view of a simplified rotation process of a micro infusion pump according to a preferred embodiment of the present invention:

FIG. 8 is a simplified rotational process structural side view of a preferred embodiment of a micropump provided by the present invention;

FIG. 9 is a schematic illustration of the use of a micropump in accordance with a preferred embodiment of the present invention;

fig. 10 is a simplified schematic structural view of a joining member according to a preferred embodiment of the present invention.

List of reference numerals

1: a control main body; 2: a rotatable outer arm; 4: a display module; 5: a panel module; 6: a first buckle; 7: a caulking groove; 8: a telescoping assembly; 9: a second buckle; 10: a groove; 11: a boosting piece; 12: an adjusting member; 13: a clamp; 14: a spring; 15: a spring base; 16: a first rotatable outer arm; 17 a second rotatable outer arm; 18: a first conduit; 19: a second conduit; 20: a converging member; 21: a telescopic tube; 22: a limiter.

Detailed Description

The following detailed description refers to the accompanying drawings.

In the description of the present invention, it should be noted that the azimuth or positional relationship indicated by the terms "vertical", "upper", "lower", "horizontal", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected, can be indirectly connected through an intermediate medium, and can also be communicated with the inside of two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

Example 1

At present, the infusion direction of a common micro infusion pump (micro pump for short) in clinic is mostly from right to left for infusion. In some cases, the infusion direction of the micro pump is often opposite to the direction of the venous access of the patient, for example, the patient is on the right side of the micro pump, and the infusion direction of the micro pump is from right to left, so that the micro infusion pump tube needs to be bent back reversely for a distance to enable the infusion direction of the micro pump to be the same as the direction of the venous access of the patient. Although the problem of different directions can be solved by changing the position of the micropump, in many cases of infusion, the position of the micropump cannot be changed usually due to the surgical position and habit problems of a patient and additional limitations of other conditions, so that the infusion pump tube is bent reversely to cause inconvenience in the infusion process to a certain extent, and the infusion pump tube is pulled too much with little carelessness. The excessive traction can lead the conduit to be folded on one hand so that the liquid can not be infused at a constant speed, and the pump pipe is pulled to fall off on the other hand; meanwhile, the length of the return bend can shorten the length of the pump tube, so that the transfusion distance is insufficient; when using multiple micropumps, reverse tortuous pumps are also inconvenient to manage. Even though this is solved by extending the infusion pump tube, the extended tubing on the one hand causes waste of the liquid medicine and on the other hand increases the risk of kinking of the tubing. There is a certain clinical risk for all of the above reasons.

In order to achieve the above purpose, the present invention provides the following technical solutions: a micro infusion pump comprises a control main body 1 and a rotatable outer arm 2. The control main body 1 is provided with a display module 4 and a panel module 5. The face module serves as a control face of the control body 1. The control body 1 is provided with a first buckle 6 and a caulking groove 7 for fixing the rotatable outer arm 2. The rotatable outer arm 2 is used as an execution main body of the micro infusion pump and has the function of adjusting the infusion direction. The back of the rotatable outer wall is provided with a rotating component of a telescopic spring 14 and is combined with the caulking groove 7 on the control main body 1, and is fixed through the clamping position of the control main body 1. When the micro infusion pump is normally used, the micro infusion pump defaults to the right-to-left infusion direction. When the transfusion direction needs to be changed, the rotatable outer arm 2 is pulled outwards, and rotated 180 degrees anticlockwise, and then the first buckle 6 is sent back in a homeopathic manner, so that the change of the transfusion direction can be realized.

Preferably, the micropump panel module 5 is a key structure, and is not a touch screen, so as to reduce the situations that faults occur and the touch screen fails and cannot be used. Compared with the prior art, the invention has the beneficial effects that: when the infusion pump is used, the infusion direction can be flexibly adjusted according to the position of an applicable object, risks such as bending, traction transition and difficult straightening of an infusion pump tube are reduced, and meanwhile, the micro pump panel module 5 is of a key structure and is not in touch screen so as to reduce the situations that the infusion pump tube is in fault and the touch screen is out of order. The telescopic component 8 connected with the rotatable outer arm 2 is a mechanical mechanism, is firm and durable, has a limiting clamping position, can be adjusted only at +180 DEG to-180 DEG, and reduces damage caused by transitional rotation.

According to a preferred embodiment, a spring 14 and a spring mount 15 for connecting the rotatable outer arm 2 are provided in the recess 7. As shown in fig. 8, a connecting rod rotatably connected to the rotatable outer arm 2 is provided in the spring 14. The connecting rod is connected to a spring 14 to restrain the rotatable outer arm 2 within the first catch 6. In the case where the rotatable outer arm 2 is taken out of the first catch 6, the spring 14 is stretched. After 180 ° rotation of the rotatable outer arm 2, the connecting rod is pulled under the action of the spring 14 and the rotatable outer arm 2 is pulled to fix the rotatable outer arm 2 again into the first catch 6. Preferably, the control main body 1 is further provided with a clamp 13 for fixing the micro infusion pump to the bedside, railing or other fixing place. The mechanical bolt structure of the clamp 13 is fixed or fixed by the elastic structure of the spring 14, which is not limited herein. The invention ensures that the infusion direction of the micro infusion pump faces to the patient, the infusion pump tube is more smooth, and the risk of bending, pulling and falling off is reduced, so that the liquid medicine is accurately, uniformly and continuously pumped into the patient.

Preferably, the rotatable outer arm 2 comprises a telescopic assembly 8, a booster 11 and an adjustment member 12. A motor is connected to the booster 11 to push the syringe provided on the groove 10 for microinjection. Preferably, the control main body 1 is provided therein with a state detecting means for detecting whether or not the syringe is loaded, and when the loading of the syringe is detected by the state detecting means, the control main body is controlled by motor driving to control the booster 11 to push the syringe. As shown in fig. 5 and 6, the rotatable outer arm 2 is preferably provided with a second catch 9 for securing the syringe. The second catch 9 is turned around to secure the syringe to the recess 10 of the rotatable outer arm 2. The adjusting member 12 can be used for start and stop of the booster 11. The state detection mechanism is also capable of detecting an abnormal condition. The abnormal condition is, for example, a condition in which the mounting state of the syringe is abnormal or a condition in which the booster 11 does not correspond to the position of the syringe. In this case, even if the motor drive control is performed, the infusion pump cannot be properly infused with the chemical solution. In the present invention, the state of the syringe is detected by the state detecting means. When the normal state is detected, the control main body 1 performs motor drive control on the booster 11, so that unnecessary injection pushing can be eliminated as much as possible, and accurate micro-infusion can be performed. Preferably, a pressure sensor can also be provided at the booster 11 to detect the pressure required by the syringe. The pressure sensor transmits a pressure signal to the control body 1, thereby preventing the blockage of the syringe passage. Preferably, the control body 1 is equipped with a pressure reducing assembly (not shown) to perform a pressure reducing process when the pressure detected by the pressure sensor is excessive. The pressure relief assembly can be, for example, but not limited to, a valve or orifice with a membrane that is connected to or placed inside the syringe. Preferably, the components and/or sensors are capable of being communicatively coupled. The respective components of the micro-infusion pump can be supplied with current from an external power source, and a power storage component, not shown, is incorporated therein, and current can be supplied through the power storage component. The state detection means may be a photoelectric sensor, and may detect the position of the syringe or the position of the booster 11 or whether the syringe is engaged with the booster 11 to determine the state of attachment of the syringe. Preferably, the state detection mechanism can also directly detect the position of the booster 11 using a micro switch. The state detecting mechanism can employ various sensors for detection, such as a size detecting sensor, etc., and will not be described herein.

The apparatus claimed in the present invention operates as follows. Medical personnel fill syringes with a trace of a medicinal fluid to be injected. Medical personnel determine the direction in which a micro infusion is desired to be administered to the patient to adjust the direction of the rotatable outer arm 2 before or after the syringe is placed in the recess 10 and aligned with the booster. When the control body 1 receives a signal to inject fluid, the control body 1 controls the booster 11 to slowly push the plunger stem of the syringe. The rate of this pushing is related to the size of the syringe and the fluid injection rate required by the patient. The pressure sensor detects during the entire advancement of the syringe. When the pressure required by its booster 11 exceeds a predetermined threshold when fluid is injected into the patient, the pressure relief assembly is activated and an alarm is sent to medical personnel. Preferably, the fluid is typically supplied to the patient fluid at a rate of from 5ml/h to 200 ml/h. Thus, the device of the present invention safely pushes several micro volumes of fluid into the patient. Since there is a wireless communication element, such as a Wi-Fi or bluetooth element, in the control body 1, the device can provide the medical staff with functions of syringe flow monitoring, occlusion alarm, etc. Compared with the micropump in the prior art, the infusion direction of the micropump can be changed through the rotatable outer arm 2, so that the blockage of a pipeline or other clinical risks caused by bending can be prevented. The device claimed by the invention has wide application value.

Example 2

This embodiment is a further improvement of embodiment 1, and the repeated contents are not repeated.

When a medical fluid is injected into a patient by a micropump, a minute amount of fluid needs to be delivered to the patient for a long time, and various clinical problems of the medical fluid may be caused when the magnitude of the fluid to be delivered is small or the time required for delivering the fluid is long. For example, during a certain delivery procedure, medical personnel pump small amounts of fluid into the infusion tube, which is relatively long with respect to the amount of fluid to be delivered, resulting in fluid being left in the infusion tube, i.e., adhering to the inner wall of the infusion tube. Or the fluid is diluted in the infusion tube such that the dosage of the fluid changes over time. For another example, some patients need to deliver medical fluids for mixing, and changes in efficacy may occur if the medical fluids remain mixed for a prolonged period of time. That is, some medical fluids require immediate mixing injection. Under prolonged operation of the micropump, medical personnel may fail after a certain period of time after performing the configuration of the medical fluid, requiring a reconfiguration for mixing. Based on the defects, the embodiment provides an improved micro infusion pump, so as to solve the problem that the delivery amount and the mixing time are uncontrollable when delivering smaller-magnitude fluid and mixing fluid in a micro infusion clinical environment.

According to a preferred embodiment, the micro-infusion pump comprises a first rotatable outer arm 16 and a second rotatable outer arm 17. At least two syringes are fitted into the first rotatable outer arm 16 and the second rotatable outer arm 17, respectively, and are converged by the converging member 20. Preferably, the microinfusion pump can also comprise a number of rotatable outer arms 2, the number of rotatable outer arms 2 corresponding to the number of syringes and being coupled via a catheter. The rotatable outer arm 2 described above can also include a third rotatable outer arm 2, a fourth rotatable outer arm 2, and so on. In the present embodiment, the first rotatable outer arm 16 and the second rotatable outer arm 17 are taken as examples, but do not represent that the described features cannot be used in more rotatable outer arms 2. Preferably, the first and second rotatable outer arms 16, 17 micro-pump the patient with the medical fluid required by the patient. Preferably, at least two syringes on the first rotatable outer arm 16 and the second rotatable outer arm 17 are connected to the confluence member 20. The confluence member 20 includes two separate pipes, each of which is supplied with fluid by a separate syringe and is converged into the same pipe. Preferably, the confluence member 20 is detachably connectable to the syringe by a luer connector.

According to a preferred embodiment, the junction 20 comprises a first conduit 18 and a second conduit 19. A telescopic tube 21 is arranged at the junction of the first conduit 18 and the second conduit 19. The telescopic tube 21 is capable of being converted from a first telescopic state to a second telescopic state. Preferably, the telescopic tube 21 is initially in a first telescopic state, whereas the telescopic tube 21 is converted into a second telescopic state when a small amount of fluid is injected therein by the booster 11. The first telescopic state is a contracted state, and the second telescopic state is an expanded state. The first telescopic state has a smaller internal volume and is a normal state of the telescopic tube 21. Preferably, the joining element 20 is provided with a limiter 22 in a downstream position compared to the telescopic tube 21. Preferably, the limiter 22 is capable of adjusting its degree of tightness. In the open state, the restrictor 22 does not restrict the passage of fluid through the junction 20. While medical fluid entered by at least two syringes flows into the bellows 21 when the limiter 22 is in the closed state.

According to a preferred embodiment, the limiter 22 is in an open state prior to microinjection of the patient. The outlet of the confluence member 20 is connected to the patient. At least two syringes are preloaded with medical fluids to be mixed. Preferably, the restrictor 22 changes to a closed state, thereby restricting fluid flow to the patient. The telescopic tube 21 is now in the first telescopic state. Preferably, at least two syringes are connected to the first conduit 18 and the second conduit 19, respectively. Preferably, the micro infusion pump is activated for a short time such that at least two medical fluids of different flows flow out of the syringe and into the first conduit 18 or the second conduit 19. Preferably, the restrictor 22 restricts fluid flow toward the patient such that fluid from at least two syringes flows into the progressively extending bellows 21. Preferably, the bellows 21 transitions from the first telescopic state to the second telescopic state upon gradual inflow of medical fluid. In the above case, the bellows 21 accommodates a quantity of medical fluid pushed out from at least two syringes. The bellows 21 acts as a mixing chamber containing a quantity of medical fluid pushed out of at least two syringes. The bellows 21 expands to a second, collapsed state, indicative of a maximum amount of medical fluid that the bellows 21 can accommodate. Preferably, the telescopic tube 21 remains in the second telescopic state and has no tendency to return to the first telescopic state. Preferably, the limiter 22 is transitioned to an open state to no longer limit the medical fluid from entering the patient. Thus, during continued pumping of the microinfusion pump, medical fluid is injected into the patient. Preferably, during pumping, the mixed fluid in bellows 21 is pushed into the patient.

Preferably, the restrictor 22 employs a valve assembly that is automatically convertible between an open state and a closed state. With the restrictor 22 in the open state, medical fluid is allowed to flow from the junction 20 into the patient. When the restrictor 22 is in the closed state, the medical fluid is restricted from flowing out of the confluence member 20. Preferably, the control body 1 controls the transition of the open state and the closed state of the restrictor 22 based on the mixing conditions required for at least two medical fluids. Preferably, the limiter 22 is capable of transitioning to an open state at a predetermined pressure. For example, in the case where the opening pressure is between 0.17MPa and 0.21MPa, the fluid is caused to flow out from the joining member 20.

The arrangement of the two rotatable outer arms 2 can be used for mixing and proportioning the input medical fluid, and automatic proportioning is carried out through the micro infusion pump, so that different types of fluids are mixed in real time in the long-time fluid injection process, and the problem of drug effect change is avoided. The cooperation of the telescopic tube 21 and the limiter 22 according to the invention can also be used for the filling of a pre-filled delivery catheter, preventing the problem of inaccurate doses of injected medical fluid due to the excessive length of the catheter. Particularly in the case of small-scale medical fluid injection, it is a very important technical means for accurate control of medical fluids. For example, when it is desired to infuse a patient with medical fluid at a rate of 10ml/h, the void in the infusion catheter is such that the rate during the first half hour may be only 9ml/h, which undoubtedly affects the infusion of patient medical fluid. The telescopic tube 21 provided by the invention can also solve the problem of flow speed fluctuation of the micro infusion pump. When the micro infusion pump is used for slow administration, the needle piston can creep and flow rate fluctuation can be caused, namely, the needle is in a flow rate stop state during part of the time, so that the needle is in blood return and coagulation blockage. In contrast, when the micro infusion pump performs slow administration to cause creeping of the needle tube piston and fluctuation of the flow rate, the telescopic tube 21 provided by the invention can realize flow rate supplement in a flow rate stopping state through changing the second telescopic state towards the first telescopic state, so that the injection of medical fluid is continuous, and the problems of blood clot, blood return and the like are solved.

Example 3

This embodiment is a further improvement of the above embodiment, and the repeated contents are not repeated.

According to a preferred embodiment, the plurality of syringes provided with the plurality of rotatable outer arms 2 are provided with the corresponding plurality of limiters 22 such that the control body 1 controls the open state and the closed state of each limiter 22. Preferably, the control body 1 is configured to: the first fluid is controlled to flow into the junction 20 in a first time series and the second fluid is metered in a second time series. Preferably, the first time series can partially overlap with the second time series. Preferably, the control body 1 controls the quantitative mixing of the different fluids under different time sequences. For mixing of multiple types of medical fluids, it is difficult to maintain the flow of fluids advanced within the different syringes during the initial stages of mixing if one or more of the fluids to be mixed require micro-mixing while the other fluid or fluids require high amounts of mixing. That is, the flow rate required for one fluid is too high and the flow rate required for the other fluid is too low, making it difficult for the resulting mixed stream to be continuously mixed.

According to a preferred embodiment, the present invention provides a micro-infusion pump that can be used for mixed injection of multiple concentrations and types of medical fluids. The micro infusion pump comprises a first conduit 18 providing a high flow of a first fluid in a first time sequence and a second conduit 19 providing a micro amount of a second fluid in a second time sequence. Preferably, the micro infusion pump can comprise several catheters and corresponding syringes providing micro fluids. Each catheter providing a trace fluid provides a dosing of the trace fluid in a second time sequence. Preferably, the high flow of the first fluid in the first conduit 18 and the trace amount of the second fluid in the second conduit 19 are mixed in the bellows 21 of the junction 20. Preferably, dosing means that the restrictor 22 in the second conduit 19 is configured to intermittently dose a predetermined amount of the second fluid in minute amounts at a predetermined flow rate. Preferably, the control body 1 is intermittent dosed by controlling the restrictor 22 in the second conduit 19. Preferably, the control body 1 is further configured to: and quantitatively delivering the third fluid in a third time sequence. Preferably, the first time series can partially overlap with the third time series. Preferably, the third time series does not overlap with the second time series, and the combination of the second time series and the third time series is smaller than the first time series. Preferably, the second time sequence is capable of being turned on in synchronization with the first time sequence. The third time sequence can end before the end of the first time sequence. The intermittent dosing means intermittent dosing performed over a certain period of time, the specific value of the dosing depends on the chemical parameters of the mixed fluid to be configured. The technical effect of so setting is that: a high flow of medical fluid is required to be delivered into the bellows in a first time series and a trace amount of medical fluid is delivered in a second time series. Traditional drug administration is a mixed fluid formed by dosing components of a medical fluid and by mixing two or more successive fluids. Medical staff needs to pre-configure a certain amount of mixed fluid and then inject the mixed fluid through a micro infusion pump. For the purposes of the present invention, this step can be incorporated into the automated flow path of a micro-infusion pump by way of a plurality of rotatable outer arms and a confluence member. The method provides for better mixing of the fluids when the concentrations of the two or more fluids and the desired total amount are close. When one or more of the fluids is a trace amount of fluid, the continuous mixing thereof results in a mixed fluid at the junction having a flow rate much less than the desired flow rate, i.e., a high flow of fluid is required to be reduced in conjunction with injection of the trace amount of fluid. Although the micro infusion pump needs the mixed fluid with low flow rate, the micro infusion pump has the problem of low injection precision. The invention distributes and mixes high-flow medical fluid and trace medical fluid according to time sequence. By stopping and/or intermittently supplying a small amount of medical fluid through the limiter, the mixing time of the mixed fluid is prolonged, and the mixed fluid with continuous low flow rate and high precision can be provided.

According to a preferred embodiment, the control body 1 controls the addition of the first fluid and/or the second fluid on the basis of a number of restrictors 22 provided for its number of ducts. In a first time sequence the first fluid and/or the second fluid is deposited on the bellows 21 for initial mixing and in a second time sequence the mixing ratio of the first fluid and the second fluid is adjusted to a predetermined value. The first time sequence refers to a first period of time for injecting a first fluid. The second time series refers to a second period of time for injecting a second fluid. The third time series refers to a third time period for injecting a third fluid. The predetermined value refers to the chemical parameters of the desired mixed fluid. For example, a patient in need of dopamine use, the first fluid is normal saline and the second fluid is dopamine. The first fluid was injected 50ml and the second fluid was injected 300mg. As another example, sodium nitroprusside and glucose are desirable medical fluids. The first fluid is sodium nitroprusside and the second fluid is glucose. The first fluid was injected 50ml and the second fluid was injected 50mg. The present embodiment will be described by taking the injection of physiological saline and dopamine into a patient as an example. The first time series took 10 minutes and the second time series took the first 5 minutes. The first fluid and the second fluid are simultaneously injected into the bellows for the first 5 minutes, and then the remaining physiological saline is injected again for 5 minutes to adjust the mixing ratio of the mixed fluids. The first fluid and the second fluid injected within 10 minutes can be small amounts of fluid of corresponding mixing ratios, for example, 5ml of physiological saline and 30mg of dopamine are injected for the first ten minutes, thereby obtaining a mixed fluid of an accurate mixing ratio. After the 10 minutes have passed, the mixed fluid is injected into the patient in a pushing way, and the quantitative first fluid and the quantitative second fluid are synchronously injected, so that the problems of low flow rate and low mixing precision of the mixed fluid at the initial stage are avoided.

In the micro infusion pump of the invention, a plurality of rotatable outer arms 2 and a plurality of corresponding syringes are arranged to form a pipeline structure for infusion. The tubing structure has a plurality of fluid conduits and is miscible to form a trace of medical fluid. The provision of a plurality of inter-syringe restrictors 22 also enables control of the concentration of trace amounts of medical fluid formed, particularly for medical fluids requiring high-rate mixing dilution, how to perform precise mixing is a continuing problem. The multi-stage tubing configuration of the present invention enables the delivery of very small amounts of trace amounts of fluid and fluid retention and blood return replenishment by the bellows 21.

Example 4

According to a preferred embodiment, the surgeon is required to wear a lead garment throughout the duration of the surgical procedure in situations where continuous drug infusion is required and objective conditions do not allow medical personnel to perform the procedure, such as during general anesthesia of the patient during the intervention procedure. Sometimes, the operation time is long, so that the medicine is used up, and at the moment, an anesthesiologist wants to replace the medicine and only requires the operator to stop operation or put on lead clothing to enter the operation room, so that on one hand, the operator cannot stop operation during key operation, and on the other hand, the lead clothing put on lead clothing to enter the operation room increases the workload of the doctor. Meanwhile, when the door of the operation room is opened and closed under the condition of radiation exposure, radiation can overflow, so that personnel outside the door are exposed by the radiation. At this time, two syringes filled with the same medicine may be respectively loaded into the first rotatable outer arm 16 and the second rotatable outer arm 17, and the confluence is performed by the confluence member 20. The medical staff member is arranged to automatically initiate the injection of the medicament in the second rotatable outer arm 17 when the medicament in the first rotatable outer arm 16 is used up by controlling the main body 1 to achieve the effect of the medicament engagement.

For example, when some drugs are continuously pumped, such as the vasoactive drug norepinephrine, the patient's blood pressure is dependent on the continuous infusion of the drug, and when the drug is exhausted and needs to be replaced, the blank time is enough to cause the patient's blood pressure to drop sharply, and a period of time is required to reach a steady drug concentration after the infusion is resumed. During this brief blanking period, blood pressure fluctuations increase the risk of cardiovascular and cerebrovascular accidents in the patient, such as cerebral vascular ruptures, cerebral infarction, myocardial infarction, arrhythmia, heart failure, cardiac arrest, etc., causing loss of the patient and increasing clinical risk. The multi-stage structure type pipeline structure can achieve the linking effect that the medicine does not stop infusing. Preferably, the control body 1 can be configured to: the first fluid is controlled to flow into the junction 20 in a first time series and the second fluid is metered in a second time series. Preferably, the first time sequence can be partially overlapped with the second time sequence to achieve seamless connection. The invention can be used for injecting mixed fluid, and can also supplement the fluid in the injector on the second rotatable outer arm 17 as the fluid of the injector on the first rotatable outer arm 16 under the condition that a patient needs to carry out non-stop medication, thereby realizing seamless connection of fluid injection and preventing clinical risks possibly occurring to the patient due to medicine stop.

Throughout this document, the word "preferably" is used in a generic sense to mean only one alternative, and not to be construed as necessarily required, so that the applicant reserves the right to forego or delete the relevant preferred feature at any time.

It should be noted that the above-described embodiments are exemplary, and that a person skilled in the art, in light of the present disclosure, may devise various solutions that fall within the scope of the present disclosure and fall within the scope of the present disclosure. It should be understood by those skilled in the art that the present description and drawings are illustrative and not limiting to the claims. The scope of the invention is defined by the claims and their equivalents. The description of the invention encompasses multiple inventive concepts, such as "preferably," "according to a preferred embodiment," or "optionally," all means that the corresponding paragraph discloses a separate concept, and that the applicant reserves the right to filed a divisional application according to each inventive concept.

Claims

1. A micro infusion pump comprising at least: a control body (1) for the delivery of micro-fluids,

characterized by further comprising:

a rotatable outer arm (2) for adjusting the infusion direction of the micro infusion pump, wherein,

The control main body (1) is provided with a first buckle (6) and a caulking groove (7) for fixing the rotatable outer arm (2), and the rotatable outer arm (2) is provided with a rotating assembly and is connected with the caulking groove (7), so that the rotatable outer arm (2) rotates to change the direction under the condition that the micro infusion pump needs to change the infusion direction.

2. The micro infusion pump of claim 1, wherein the rotation assembly comprises:

a spring (14) for connecting the rotatable outer arm (2),

a spring mount (15) for fixing the spring (14), and

a connecting rod rotatably connected with the rotatable outer arm (2); wherein the connecting rod is connected to a spring (14) to constrain the rotatable outer arm (2) within the first clasp (6), the spring (14) being stretched in the event that the rotatable outer arm (2) is disengaged from the first clasp (6); after the rotatable outer arm (2) changes orientation, the spring (14) pulls the connecting rod to indirectly pull the rotatable outer arm (2) to fix the rotatable outer arm (2) into the first clasp (6).

3. The micro-infusion pump according to claim 1 or 2, wherein the rotatable outer arm (2) comprises a telescopic component (8), a boosting component (11) and an adjusting component, the boosting component (11) is used for pushing a syringe arranged on the groove (10) to perform micro-injection, a state detection mechanism for detecting whether the syringe is installed or not is arranged in the control main body (1), and the control main body (1) performs driving control on the boosting component (11) to push the syringe under the condition that the state detection mechanism detects that the groove (10) is installed in the syringe.

4. A microinfusion pump according to any of claims 1-3, characterized in that a second catch (9) for securing the syringe is provided on the rotatable outer arm (2), the second catch (9) being turned around to secure the syringe to the recess (10) of the rotatable outer arm (2).

5. The micropipette pump according to any one of claims 1-4, characterized in that it comprises a first rotatable outer arm (16) and a second rotatable outer arm (17), at least two syringes being provided in the first rotatable outer arm (16) and the second rotatable outer arm (17), respectively, and that the confluence of the micropipettes is performed by means of a confluence member (20).

6. The micro infusion pump according to any one of claims 1 to 5, wherein the confluence member (20) comprises a first conduit (18) and a second conduit (19), and a telescopic tube (21) is arranged at the joint of the first conduit (18) and the second conduit (19), wherein the telescopic tube (21) can be converted from a first telescopic state to a second telescopic state to change the volume of the micro fluid in the confluence member (20).

7. The micro-infusion pump according to any one of claims 1 to 6, wherein the confluence member (20) is provided with a restrictor (22) at a position downstream of the bellows (21), the restrictor (22) being capable of adjusting the tightness of the confluence member (20), wherein the restrictor (22) does not restrict the flow of micro-fluid through the confluence member (20) in the case of an open state of the restrictor (22), and wherein the micro-fluid inputted by at least two syringes flows into the bellows (21) in the case of a closed state of the restrictor (22).

8. The microinfusion pump according to any of claims 1 to 7, wherein the restrictor (22) is in an open state prior to microinjection into the patient, the microinjection pump being pre-filled with the microinjection fluid to be mixed in at least two syringes, the restrictor (22) being changed to a closed state, restricting the flow of the microinjection fluid to the patient,

the control body (1) controls the actuation of the booster (11) such that at least two micro-fluids of different flow rates flow out of the syringes and into the first conduit (18) and/or the second conduit (19), the restrictor (22) restricting the flow of micro-fluids towards the patient such that the micro-fluids flowing out of the at least two syringes flow into the extended bellows (21).

9. The micro infusion pump according to any one of claims 1 to 8, wherein the bellows (21) accommodates micro fluid pushed out from at least two syringes and acts as a mixing chamber for the micro fluid, wherein the bellows (21) maintains the second telescopic state and has no tendency to return to the first telescopic state.

10. The micro-infusion pump according to any one of claims 1 to 9, wherein a number of syringes provided with a number of rotatable outer arms (2) are provided with a corresponding number of limiters (22) such that the control body (1) controls an open state and a closed state of each limiter (22), wherein the control body (1) is further configured to:

Controlling the flow of a first fluid into the junction (20) during a first time sequence and the quantitative delivery of a second fluid during a second time sequence; controlling the addition of the first and/or second fluid based on a number of limiters (22) provided for a number of conduits, the first and/or second fluid being deposited on a bellows (21) for initial mixing during the first time sequence and the mixing ratio of the first and second fluid being adjusted to a predetermined value during the second time sequence.