CN114796714A

CN114796714A - Infusion device

Info

Publication number: CN114796714A
Application number: CN202110061991.4A
Authority: CN
Inventors: 李楠; 程树群; 全懿; 时德钢; 杨康; 其他发明人请求不公开姓名
Original assignee: Shanghai Microport Lifesciences Co Ltd
Current assignee: Shanghai Microport Lifesciences Co Ltd
Priority date: 2021-01-18
Filing date: 2021-01-18
Publication date: 2022-07-29

Abstract

The present invention provides an infusion device comprising: a switch and at least two sachets; the change-over switch comprises an outer cylinder and an inner core, wherein the outer cylinder is provided with a first inner cavity, and the inner core is rotatably arranged in the first inner cavity around the axis of the outer cylinder; the outer cylinder comprises a liquid outlet and at least two liquid inlets, and the at least two liquid inlets are respectively connected with different medicine bags; the liquid outlet and the liquid inlet are respectively arranged on the outer cylinder in a penetrating way along the radial direction of the outer cylinder and are communicated with the first inner cavity; the inner core is provided with a second inner cavity and comprises at least two liquid outlet communicating ports and at least two liquid inlet communicating ports, and the liquid outlet communicating ports and the liquid inlet communicating ports are respectively arranged on the inner core in a penetrating way along the radial direction of the inner core and communicated with the second inner cavity; when the inner core rotates around the axis of the outer barrel, the at least two liquid outlet communicating ports are driven to be sequentially communicated with the liquid outlets, and when the liquid outlets are communicated with different liquid outlet communicating ports, different liquid inlet communicating ports are sequentially communicated with the corresponding liquid inlets.

Description

Infusion device

Technical Field

The invention relates to the technical field of medical instruments, in particular to an infusion device.

Background

The liquid medicine infusion pump is an intelligent infusion device, and is special medical equipment which utilizes mechanical driving force to accurately control the number of infusion drops or the flow rate of infusion and ensures that the liquid medicine infusion pump can accurately and safely enter the body of a patient. The clinical application of the liquid medicine infusion pump greatly improves the accuracy, safety and nursing quality of infusion. The device is widely applicable to the infusion of liquid medicine to patients in emergency rooms, operating rooms, pediatrics, obstetrics and gynecology, hematology, internal medicine, surgery and general wards of various hospitals. Such as injection of various special drugs such as antihypertensive, anticoagulant, hormone, oxytocin and the like, or chemotherapy by using an injection pump, continuous injection of analgesics and the like.

In the course of extensive use of the present-stage liquid medicine infusion pumps, some need to switch to infusion of one liquid medicine after the infusion of another liquid medicine is completed. For example, in the process of treating tumors, after the chemotherapy drug infusion is completed, the infusion of anticoagulant heparin needs to be switched to prevent blood coagulation of chemotherapy liquid pipelines. Chemotherapy drugs need to be continuously infused for about 1 to 3 days, and in order to infuse heparin after the infusion of chemotherapy drugs is completed, patients need to be hospitalized in a hospital or come to the hospital again after the completion of the chemotherapy drug infusion, which causes troubles to doctors and patients. Therefore, a new infusion device is needed to facilitate the switching infusion of different medical fluids. In some infusion devices, the three-way switch is used to switch the liquid medicine, and the existing three-way switch structure in the market is a planar liquid path switch, such as the three-way switch disclosed in chinese patent application with publication number CN2843515Y, the input and output pipelines of the three-way switch are located on the same plane, are arranged in a substantially T shape, and are manually switched. The three-way switch is limited by the existing three-way switch structure, three paths of the three-way switch all lead to different directions, and the three-way switch cannot be arranged in a structure with a certain space tension and a limited liquid path flowing direction, so the three-way switch is not suitable for an infusion device with higher requirement on portability.

Disclosure of Invention

The invention aims to provide an infusion device, which solves the problems that the existing liquid path change-over switch is large in size and difficult to integrate with the infusion device.

In order to solve the above technical problem, the present invention provides an infusion device, comprising: a switch and at least two sachets;

the change-over switch comprises an outer barrel and an inner core, wherein the outer barrel is provided with a first inner cavity, and the inner core is rotatably arranged in the first inner cavity around the axis of the outer barrel;

the outer cylinder comprises a liquid outlet and at least two liquid inlets, and the at least two liquid inlets are respectively connected with different medicine bags; the liquid outlet and the liquid inlet are respectively arranged on the outer cylinder in a penetrating way along the radial direction of the outer cylinder and are communicated with the first inner cavity;

the inner core is provided with a second inner cavity and comprises at least two liquid outlet communicating ports and at least two liquid inlet communicating ports, and the liquid outlet communicating ports and the liquid inlet communicating ports are respectively arranged on the inner core in a penetrating manner along the radial direction of the inner core and communicated with the second inner cavity;

the liquid outlets and the at least two liquid inlets are arranged at different axial positions of the outer cylinder; different liquid outlet communication ports correspond to the same liquid outlet; different liquid inlet communication ports correspond to different liquid inlets; when the inner core rotates around the axis of the outer barrel, at least two liquid outlet communicating ports are driven to be sequentially communicated with the liquid outlet, and when the liquid outlet is communicated with different liquid outlet communicating ports, different liquid inlet communicating ports are sequentially communicated with the corresponding liquid inlets.

Optionally, in the infusion device, axial positions of the at least two liquid inlets along the outer cylinder respectively correspond to axial positions of the at least two liquid inlet communication ports along the outer cylinder, and axial positions of the at least two liquid outlet communication ports along the outer cylinder correspond to axial positions of the at least two liquid outlet communication ports along the outer cylinder; the difference of the circumferential positions of the at least two liquid inlets along the outer cylinder is different from the difference of the circumferential positions of the at least two liquid inlet communication ports along the outer cylinder; the difference of the circumferential positions of the at least two liquid inlet communication ports along the outer barrel is the same as the difference of the circumferential positions of the at least two liquid outlet communication ports along the outer barrel.

Optionally, in the infusion apparatus, a difference between circumferential positions of the liquid outlet and any one of the liquid inlets along the outer cylinder is at least the same as a difference between circumferential positions of one of the liquid outlet communication ports and one of the liquid inlet communication ports along the outer cylinder.

Optionally, in the infusion apparatus, the circumferential positions of the liquid outlet and the at least two liquid inlets along the outer cylinder are the same.

Optionally, in the infusion device, an included angle between at least two of the liquid inlet communication ports and a connecting line of the axis of the inner core is 90 °.

Optionally, in the infusion device, the switch further includes a sealing member disposed around the inner core and abutting against the outer barrel to seal the inner core and the outer barrel.

Optionally, in the infusion device, an inner diameter of the first inner cavity is matched with an outer diameter of the inner core, and the inner core can close the liquid outlet and the liquid inlet.

Optionally, the infusion device further comprises an indicating part, and the indicating part is connected with the inner core and changes positions along with the rotation of the inner core.

Optionally, the infusion device further comprises a switching motor, an output end of the switching motor is coupled to the inner core, and the switching motor is configured to drive the inner core to rotate around the axis of the outer barrel.

Optionally, the infusion device further comprises a peristaltic infusion module, and the peristaltic infusion module is connected to the liquid outlet and is used for pumping the liquid medicine from the liquid outlet to the outside.

In summary, the infusion device provided by the present invention comprises: a switch and at least two sachets; the change-over switch comprises an outer barrel and an inner core, wherein the outer barrel is provided with a first inner cavity, and the inner core is rotatably arranged in the first inner cavity around the axis of the outer barrel; the outer cylinder comprises a liquid outlet and at least two liquid inlets, and the at least two liquid inlets are respectively connected with different medicine bags; the liquid outlet and the liquid inlet are respectively arranged on the outer cylinder in a penetrating way along the radial direction of the outer cylinder and are communicated with the first inner cavity; the inner core is provided with a second inner cavity and comprises at least two liquid outlet communicating ports and at least two liquid inlet communicating ports, and the liquid outlet communicating ports and the liquid inlet communicating ports are respectively arranged on the inner core in a penetrating manner along the radial direction of the inner core and communicated with the second inner cavity; the liquid outlets and the at least two liquid inlets are arranged at different axial positions of the outer cylinder; different liquid outlet communication ports correspond to the same liquid outlet; different liquid inlet communication ports correspond to different liquid inlets; when the inner core rotates around the axis of the outer barrel, at least two liquid outlet communicating ports are driven to be sequentially communicated with the liquid outlet, and when the liquid outlet is communicated with different liquid outlet communicating ports, different liquid inlet communicating ports are sequentially communicated with the corresponding liquid inlets.

So the configuration, through the axis rotation of drive inner core around the urceolus, can realize making liquid outlet and different inlet intercommunications, realize the switching of liquid way. Because the liquid outlet and at least two liquid inlets are arranged on different axial positions of the outer barrel, the liquid outlet communicating port and the liquid inlet communicating port are respectively arranged, different liquid outlet communicating ports correspond to the same liquid outlet, the positions and the directions of the liquid inlets and the liquid outlets can be flexibly arranged, the size of the change-over switch can be reduced, and the infusion device is suitable for being applied to an infusion device with limited space. Based on the above configuration, the infusion device provided by this embodiment can be used for patients to perform daily application of switching infusion of various liquid medicines, and the patients can monitor the infusion state in real time and flexibly switch infusion liquid medicines. Furthermore, the infusion device is small in size and good in portability, the medicine bag, the change-over switch, the change-over motor, the peristaltic infusion module and other components are integrated in one shell, the pipeline is clean and tidy, pollution is not prone to occurring, and the infusion device is convenient to use.

Drawings

It will be appreciated by those skilled in the art that the drawings are provided for a better understanding of the invention and do not constitute any limitation to the scope of the invention. Wherein:

FIG. 1 is an overall schematic view of an infusion device in accordance with an embodiment of the present invention;

FIG. 2 is a perspective view of a diverter switch according to one embodiment of the present invention;

FIG. 3 is an axial cross-sectional view of a diverter switch according to one embodiment of the present invention;

FIG. 4a is a schematic view of a switch for turning on a first sachet according to one embodiment of the present invention;

FIG. 4b is a schematic view of a switch in accordance with one embodiment of the present invention turning on a second sachet;

FIG. 5 is a schematic view of a diverter switch coupled to a diverter motor in accordance with one embodiment of the present invention;

FIG. 6 is a perspective view of a diverter switch according to another embodiment of the present invention;

FIG. 7 is a block diagram of an infusion device in accordance with an embodiment of the present invention;

fig. 8 is a flow chart of the use of an infusion device in accordance with an embodiment of the present invention.

In the drawings:

10-a diverter switch; 11-an outer barrel; 111-a liquid outlet; 112-a liquid inlet; 12-an inner core; 121-liquid outlet communicating port; 122-a liquid inlet communication port; 13-a seal; 14-an indication part; 15-switching the motor; 16-a connecting part;

20-a sachet; 30-a housing; 40-a display screen; 50-key press; 60-peristaltic infusion module; 70-power supply, 80-buzzer; 91-a processor; 92-control circuit.

Detailed Description

To further clarify the objects, advantages and features of the present invention, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. It is to be noted that the drawings are in greatly simplified form and are not to scale, but are merely intended to facilitate and clarify the explanation of the embodiments of the present invention. Further, the structures illustrated in the drawings are often part of actual structures. In particular, the drawings may have different emphasis points and may sometimes be scaled differently.

As used in this application, the singular forms "a", "an" and "the" include plural referents, the term "or" is generally employed in a sense including "and/or," the terms "a" and "an" are generally employed in a sense including "at least one," the terms "at least two" are generally employed in a sense including "two or more," and the terms "first", "second" and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, features defined as "first", "second", "third" may explicitly or implicitly include one or at least two of such features, the term "proximal" generally being the end near the operator, the term "distal" generally being the end near the patient, i.e. near the lesion, the terms "end" and "proximal" and "distal" generally referring to the corresponding two parts, which include not only the end points, the terms "mounted", "connected" and "connected" being to be understood in a broad sense, e.g. as being fixedly connected, as well as detachably connected, or as an integral part; either directly or indirectly through intervening media, either internally or in any other relationship. Furthermore, as used in the present invention, the disposition of an element with another element generally only means that there is a connection, coupling, fit or driving relationship between the two elements, and the connection, coupling, fit or driving relationship between the two elements may be direct or indirect through intermediate elements, and cannot be understood as indicating or implying any spatial positional relationship between the two elements, i.e., an element may be in any orientation inside, outside, above, below or to one side of another element, unless the content clearly indicates otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The invention aims to provide an infusion device, which aims to solve the problems that a liquid path change-over switch in the existing infusion device is large in size and difficult to integrate.

The following description refers to the accompanying drawings.

Referring to fig. 1 to 8, fig. 1 is a general schematic view of an infusion device according to an embodiment of the present invention; FIG. 2 is a perspective view of a diverter switch according to one embodiment of the present invention; FIG. 3 is an axial cross-sectional view of a diverter switch according to one embodiment of the present invention; FIG. 4a is a schematic view of a switch for turning on a first sachet according to one embodiment of the present invention; FIG. 4b is a schematic view of a switch in accordance with one embodiment of the present invention turning on a second sachet; FIG. 5 is a schematic view of a diverter switch coupled to a diverter motor in accordance with one embodiment of the present invention; FIG. 6 is a perspective view of a diverter switch according to another embodiment of the present invention; FIG. 7 is a block diagram of an infusion device in accordance with an embodiment of the present invention; fig. 8 is a flow chart of the use of an infusion device in accordance with an embodiment of the present invention.

As shown in fig. 1 to 3, an embodiment of the present invention provides an infusion apparatus including: a switch 10 and at least two sachets 20; the switch pack 10 comprises an outer barrel 11 and an inner core 12, wherein the outer barrel 11 is provided with a first inner cavity, and the inner core 12 is rotatably arranged in the first inner cavity around the axis of the outer barrel 11; the outer cylinder 11 comprises a liquid outlet 111 and at least two liquid inlets 112, and the at least two liquid inlets 112 are respectively connected with different medicine bags 20; the liquid outlet 111 and the liquid inlet 112 are respectively arranged on the outer cylinder 11 in a penetrating manner along the radial direction of the outer cylinder 11 and are communicated with the first inner cavity; the inner core 12 is provided with a second inner cavity, the inner core 12 comprises at least two liquid outlet communication ports 121 and at least two liquid inlet communication ports 122, and the liquid outlet communication ports 121 and the liquid inlet communication ports 122 are respectively arranged on the inner core 12 in a penetrating manner along the radial direction of the inner core 12 and are communicated with the second inner cavity; the liquid outlet 111 and the at least two liquid inlets 122 are arranged at different axial positions of the outer cylinder 11; different liquid outlet communication ports 121 correspond to the same liquid outlet 111; different liquid inlet communication ports 122 correspond to different liquid inlets 112; when the inner core 12 rotates around the axis of the outer cylinder 11, at least two liquid outlet communicating openings 121 are driven to be sequentially communicated with the liquid outlet 111, and when the liquid outlet 111 is communicated with different liquid outlet communicating openings 121, different liquid inlet communicating openings 122 are sequentially communicated with the corresponding liquid inlets 112.

With such a configuration, the inner core 12 is driven to rotate around the axis of the outer cylinder 11, so that the liquid outlet 111 can be communicated with different liquid inlets 112, and the liquid path can be switched. Because the liquid outlet 111 and the at least two liquid inlets 112 are arranged at different axial positions of the outer barrel 11, the liquid outlet communicating port 121 and the liquid inlet communicating port 122 are separately arranged, and different liquid outlet communicating ports 121 correspond to the same liquid outlet 111, the positions and directions of the liquid inlets 112 and the liquid outlets 111 can be flexibly arranged, the volume of the change-over switch 10 can be reduced, and the change-over switch is suitable for being applied to an infusion device with limited space.

Referring to fig. 1, in an exemplary embodiment, the infusion device further includes: the housing 30, the switch 10 and the capsule 20 are all housed within the housing 30. Further, the infusion device further comprises a peristaltic infusion module 60, the peristaltic infusion module 60 also being housed in the housing 30. The peristaltic infusion module 60 is connected to the liquid outlet 111, and is configured to pump the liquid medicine from the liquid outlet 111. The peristaltic infusion module 60 is connected with the liquid outlet 111, and the function of sequentially infusing liquid medicines in different medicine bags 20 can be realized by switching the selector switch 10, compared with the mode that the pump is arranged at the outlet of the medicine bag 20, only one set of peristaltic infusion module 60 can be adopted, and the structure of the device is simplified.

With continued reference to fig. 2 and fig. 3, preferably, the axial positions of at least two liquid inlets 112 along the outer tube 11 respectively correspond to the axial positions of at least two liquid inlet communication ports 122 along the outer tube 11, and the axial positions of the liquid outlets 111 along the outer tube 11 correspond to the axial positions of at least two liquid outlet communication ports 121 along the outer tube 11; the difference between the circumferential positions of the at least two liquid inlets 112 along the outer cylinder 11 is different from the difference between the circumferential positions of the at least two liquid inlet communication ports 122 along the outer cylinder 11; the difference in the circumferential position of the at least two liquid inlet communication ports 122 along the outer tube 11 is the same as the difference in the circumferential position of the at least two liquid outlet communication ports 121 along the outer tube 11.

The axial position of the liquid inlet communication port 122 along the outer tube 11 corresponds to the axial position of the liquid inlet 112 along the outer tube 11, which means that the axial positions of the liquid inlet 112 and the liquid inlet communication port 122 are substantially the same after the inner core 12 is installed in the first cavity. When the inner core 12 is rotated to a certain angle, the liquid inlet 112 is aligned or partially aligned with the liquid inlet communication port 122, so that the liquid inlet 112 is communicated with the second inner cavity of the inner core 12, and the liquid medicine can flow into the second inner cavity from the liquid inlet 112. Similarly, the axial position of the liquid outlet 111 along the outer tube 11 corresponds to the axial position of the at least two liquid outlet communication ports 121 along the outer tube 11, and it can be understood that the liquid outlet 111 and the at least two liquid outlet communication ports 121 are located at substantially the same axial position, and when the inner core 12 is rotated, the at least two liquid outlet communication ports 121 can be aligned or partially aligned with the liquid outlet 111, so that the second inner cavity is communicated with the liquid outlet 111, and thus the liquid medicine in the second inner cavity can flow out from the liquid outlet 111.

In the following, further explaining the meaning of the difference of the circumferential positions, in one example, a reference line perpendicular to the axis of the outer cylinder 11 is made through the center of one of the liquid inlets 112, and an angle formed between the reference lines of at least two of the liquid inlets 112 is the difference of the circumferential positions of at least two of the liquid inlets 112 along the outer cylinder 11. It is to be understood that the difference between the circumferential positions of the at least two liquid inlet communication ports 122 along the outer cylinder 11, and the difference between the circumferential positions of the at least two liquid outlet communication ports 121 along the outer cylinder 11 are similar to the definition of the difference between the circumferential positions of the liquid inlet 112 along the outer cylinder 11, and can be understood by referring to the above description.

The difference of the circumferential positions of the liquid inlets 112 is different from the difference of the circumferential positions of the liquid inlet communication ports 122, so that when the inner core 12 rotates, only one liquid inlet 112 can be communicated with the corresponding liquid inlet communication port 122 at each time, and one liquid inlet can be selected from different medicine bags 20 to be communicated. The difference of the circumferential positions of the liquid inlet communicating openings 122 is the same as the difference of the circumferential positions of the liquid outlet communicating openings 121, so that when one liquid inlet 112 is communicated with the liquid inlet communicating opening 122, the liquid outlet 111 is communicated with only one liquid outlet communicating opening 121, and different medicine bags 20 are communicated with the liquid outlet 111.

Further, the difference between the circumferential positions of the liquid outlet 111 and any one of the liquid inlets 112 along the outer tube 11 is at least the same as the difference between the circumferential positions of one of the liquid outlet communication ports 121 and one of the liquid inlet communication ports 122 along the outer tube 11. The configuration further ensures that the inner core 12 is matched with the outer cylinder 11, and the inner core 12 can synchronously conduct two liquid paths of liquid inlet and liquid outlet when rotating. In other embodiments, the inner core 12 may also include two sections that can rotate relatively independently, so that the difference between the circumferential positions of the liquid outlet 111 and the liquid inlet 112 is not limited to be the same as the difference between the circumferential positions of the liquid outlet communication port 121 and the liquid inlet communication port 122, and the two liquid paths of the liquid inlet and the liquid outlet can be respectively communicated by rotating the different sections of the inner core 12.

As shown in fig. 2 and 3, in an exemplary embodiment, the positions of the liquid outlet 111 and the at least two liquid inlets 112 are the same along the circumferential direction of the outer cylinder 11, that is, the liquid outlet 111 and the liquid inlets 112 are sequentially arranged along the axial direction in the same radial direction of the outer cylinder 11. The liquid path switching can be realized on the same side of the switch 10, and the switch is suitable for being arranged in a shell 30 with limited space. Preferably, the included angle between each of the at least two liquid inlet communication ports 122 and the line (the line passing through the center of the liquid inlet communication port 122 and perpendicular to the axis of the inner core 12) of the axis of the inner core 12 is 90 °, and the included angle between each of the at least two liquid outlet communication ports 121 and the line (the line passing through the center of the liquid outlet communication port 121 and perpendicular to the axis of the inner core 12) of the axis of the inner core 12 is 90 °. So configured, the inner core 12 can be rotated 90 ° to switch between different sachets 20. It is further preferred that the number of the medicine bags 20, the liquid inlet 112 and the liquid inlet communication port 122 is two, which is the simplest structure for realizing the liquid path switching of different medicine bags 20, and is beneficial to reducing the whole volume of the infusion device under the condition that the requirement can be met. Referring to fig. 3 and 6, which respectively show the arrangement of two liquid inlet communication ports 122 with the same 90 ° angle in different embodiments, it will be understood that in these two different embodiments, the inner core 12 performs the switching of the rotation direction of the different sachets 20. It should be noted that the above illustration is only an example and not a limitation to the specific structure of the switch 10.

Referring to fig. 3, optionally, the inner diameter of the first inner cavity is matched with the outer diameter of the inner core 12, and the inner core 12 can close the liquid outlet 111 and the liquid inlet 112. In an alternative embodiment, the outer barrel 11 is closed at one end and open at the other end, the first inner cavity is formed as a cylindrical blind cavity with an inner diameter equal to the outer diameter of the inner core 12 or slightly larger than the outer diameter of the inner core 12, so that the inner core 12 can be tightly attached to the inner wall of the outer barrel 11 after being inserted into the first inner cavity, and when the inner core 12 is rotated to a position where the inlet port 112 is not aligned (or partially aligned) with the inlet communication port 122, the inner core 12 can form a seal for the inlet port 112, thereby preventing (or reducing) the flow of the liquid medicine in the unselected sachets 20 into the first cavity. Likewise, when the inner core 12 is rotated such that the liquid outlet 111 is not aligned (or partially aligned) with the liquid outlet communication port 112, the inner core 12 can form a closure for the liquid outlet 111.

Further, the switch 10 further includes a sealing member 13, and the sealing member 13 is disposed around the inner core 12 and abuts against the outer barrel 11 to seal the inner core 12 and the outer barrel 11. Preferably, the sealing member 13 is disposed at one end of the inner core 12 closed away from the outer tube 11, and is further away from the one end of the outer tube 11 closed relative to all of the liquid outlet communication port 121 and the liquid inlet communication port 122. The sealing member 13 is arranged to effectively prevent the liquid medicine from flowing out of the outer cylinder 11 from the first inner cavity. In use, a small amount of medical fluid may flow into the gap between the inner core 12 and the outer barrel 11, and the presence of the seal 13 further prevents this portion of the medical fluid from flowing out of the switch 10 and contaminating other components of the infusion set.

Optionally, the infusion device further comprises an indicating part 14, wherein the indicating part 14 is connected with the inner core 12 and changes the position along with the rotation of the inner core 12. As shown in fig. 3, the indicating portion 14 may be a pointer for following the rotation of the inner core 12, and when the inner core 12 rotates to switch different liquid paths, the indicating portion 14 may be located at different positions to indicate the currently conducted liquid path. Suitably, the housing 30 may be windowed or covered with a transparent material at a location corresponding to the indicator 14 to facilitate viewing by the user and avoid problems associated with incorrect infusion sequences.

Preferably, referring to fig. 5, the infusion device further includes a switching motor 15, an output end of the switching motor 15 is coupled to the inner core 12, and the switching motor 15 is configured to drive the inner core 12 to rotate around an axis of the outer barrel 11. The switching motor 15 may be a servo motor or a stepping motor, for example, which may be coupled to the core 12 via a transmission assembly. The drive assembly may include, for example, a gear drive or worm drive, as is common in the art. Optionally, the switch 10 further includes a connecting portion 16, and the connecting portion 16 is fixedly connected to one end of the inner core 12 and is configured to be coupled to the switching motor 15. Referring to fig. 4a and 4b, in an alternative embodiment, the connecting portion 16 has a kidney-shaped power transmission hole, and the output shaft of the transmission assembly is also kidney-shaped, and the two are inserted to transmit torque.

Preferably, referring to fig. 7, the infusion apparatus further includes a display 40, a button 50, a power supply 70, a buzzer 80, a processor 91, a control circuit 92, etc., and referring to fig. 7, a person skilled in the art can connect and configure the display 40, the button 50, the power supply 70, the buzzer 80, the processor 91, the control circuit 92, etc. according to the prior art, and details thereof are not described herein.

The steps of using the infusion device provided in the present embodiment are exemplarily described below with reference to fig. 8.

Step one S1: loading the capsule 20 into the housing 30; the two medicine sacs 20 are respectively filled with different medicines, for example, one medicine sac 20 is filled with chemotherapy medicines, the other medicine sac 20 is filled with anticoagulant heparin, the two medicine sacs 20 are respectively connected to two different liquid inlets 112 through pipelines, and the first medicine sac 20 is selected through a switch. In this step, by observing the indicating portion 14 on the changeover switch, it is possible to determine which medicine capsule 20 is currently turned on, and it is possible to effectively prevent the medicine capsule 20 from being erroneously loaded.

Step two S2: exhausting; the air exhaust operation is carried out by pressing the key 50 and combining the content displayed by the display screen 40, when the key 50 is pressed to exhaust air, the processor 91 controls the stepping motor in the peristaltic infusion module 60 to carry out infusion in a peristaltic mode through the control circuit 92, when the air exhaust is suspended after the liquid medicine in one medicine bag 20 flows through the change-over switch 10, the change-over switch 10 switches the liquid path, the air exhaust is continued after another medicine bag 20 is selected, and the catheter is connected with a human body after the air in the catheter is exhausted. If the switch 10 is far from the medicine bag 20, the size of the medicine bag 20 can be increased when the total medicine quantity is greatly influenced by the liquid medicine discharged in the air discharging process.

Step three S3: infusion; the infusion speed is set by pressing the key 50 and combining the content displayed by the display screen 40, the processor 91 controls the stepping motor in the peristaltic infusion module 60 to perform peristaltic infusion according to the selected infusion speed, the display screen 40 can display the infusion speed and the current residual drug amount in the drug bag 20 in real time in the infusion process, the residual drug amount is monitored in real time through software, when the residual drug amount is smaller than a set value, judgment that drug infusion is about to end is provided, and the buzzer 80 performs buzzing prompt at the moment. When the residual medicine amount in one medicine bag 20 is zero, the infusion of the current medicine bag 20 is judged to be finished, the infusion device stops moving, the buzzer 80 gives a prompt, and meanwhile, the display screen 40 displays information to prompt a user to carry out medicine bag switching operation.

Step four S4: switching the medicine bags; the user confirms to perform the capsule switching operation according to the prompt of the display screen 40, after the switching motor 15 drives the switch 10 to switch to the second capsule 20, the user continues to infuse the liquid medicine in the second capsule 20 after pressing the key 50, the switch 10 may preferably further be provided with a feedback device to confirm that the switch 10 has switched to the second capsule 20, otherwise, the display screen 40 and the buzzer 80 may remind. If the infusion rate of the second capsule 20 is to be changed, the user can set the infusion rate before pressing button 50 to confirm that the infusion is to be performed. After the infusion of the liquid medicine in the second medicine bag 20 is finished, the display screen 40 and the buzzer 80 remind the user, if the infusion device comprises a plurality of medicine bags 20, the fourth step is repeated until all the liquid medicine in the medicine bags 20 is infused, and then the infusion device is manually disconnected from the human body by the user.

In summary, the infusion device provided by the present invention comprises: a switch and at least two sachets; the change-over switch comprises an outer barrel and an inner core, wherein the outer barrel is provided with a first inner cavity, and the inner core is rotatably arranged in the first inner cavity around the axis of the outer barrel; the outer cylinder comprises a liquid outlet and at least two liquid inlets, and the at least two liquid inlets are respectively connected with different medicine bags; the liquid outlet and the liquid inlet are respectively arranged on the outer cylinder in a penetrating way along the radial direction of the outer cylinder and are communicated with the first inner cavity; the inner core is provided with a second inner cavity and comprises at least two liquid outlet communicating ports and at least two liquid inlet communicating ports, and the liquid outlet communicating ports and the liquid inlet communicating ports are respectively arranged on the inner core in a penetrating manner along the radial direction of the inner core and communicated with the second inner cavity; the liquid outlets and the at least two liquid inlets are arranged at different axial positions of the outer cylinder; different liquid outlet communication ports correspond to the same liquid outlet; different liquid inlet communication ports correspond to different liquid inlets; the inner core centers on when the axis of urceolus rotates, drive at least two play liquid intercommunication mouths in proper order with the liquid outlet intercommunication, just the liquid outlet with the difference when going out the liquid intercommunication mouth intercommunication, the difference the liquid inlet intercommunication mouth in proper order with correspond the inlet intercommunication. So the configuration, through the axis rotation of drive inner core around the urceolus, can realize making liquid outlet and different inlet intercommunications, realize the switching of liquid way. Because the liquid outlet and at least two liquid inlets are arranged on different axial positions of the outer barrel, the liquid outlet communicating port and the liquid inlet communicating port are respectively arranged, different liquid outlet communicating ports correspond to the same liquid outlet, the positions and the directions of the liquid inlets and the liquid outlets can be flexibly arranged, the size of the change-over switch can be reduced, and the infusion device is suitable for being applied to an infusion device with limited space. Based on the above configuration, the infusion device provided by this embodiment can be used for patients to perform daily application of switching infusion of various liquid medicines, and the patients can monitor the infusion state in real time and flexibly switch infusion liquid medicines. Furthermore, the infusion device is small in size and good in portability, the medicine bag, the change-over switch, the change-over motor, the peristaltic infusion module and other components are integrated in one shell, the pipeline is clean and tidy, pollution is not prone to occurring, and the infusion device is convenient to use.

It should be noted that, in the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, similar parts between the embodiments may be referred to each other, and different parts between the embodiments may also be used in combination with each other, which is not limited by the present invention. The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.

Claims

1. An infusion device, comprising: a switch and at least two sachets;

2. The infusion device according to claim 1, wherein the axial positions of the at least two liquid inlets along the outer barrel correspond to the axial positions of the at least two liquid inlet communication ports along the outer barrel, respectively, and the axial positions of the at least two liquid outlet communication ports along the outer barrel correspond to the axial positions of the at least two liquid outlet communication ports along the outer barrel; the difference of the circumferential positions of the at least two liquid inlets along the outer cylinder is different from the difference of the circumferential positions of the at least two liquid inlet communication ports along the outer cylinder; the difference of the circumferential positions of the at least two liquid inlet communication ports along the outer barrel is the same as the difference of the circumferential positions of the at least two liquid outlet communication ports along the outer barrel.

3. The infusion device as claimed in claim 2, wherein the difference in circumferential position of said outlet port and any one of said inlet ports along said outer barrel is at least the same as the difference in circumferential position of one of said outlet communication ports and one of said inlet communication ports along said outer barrel.

4. The infusion device of claim 3, wherein the fluid outlet and at least two of the fluid inlets are located at the same circumferential position along the outer barrel.

5. The infusion device according to claim 4, wherein at least two of said inlet connections are each at a 90 ° angle to a line drawn along the axis of said plunger.

6. The infusion device of claim 1, wherein the diverter switch further comprises a seal disposed around the inner plunger and abutting the outer barrel to seal the inner plunger from the outer barrel.

7. The infusion device as claimed in claim 1, wherein the inner diameter of the first lumen is adapted to the outer diameter of the inner core, the inner core being capable of enclosing the liquid outlet and the liquid inlet.

8. The infusion device of claim 1, further comprising an indicator portion coupled to the inner core and changing position as the inner core is rotated.

9. The infusion device of claim 1, further comprising a switching motor having an output coupled to the inner core, the switching motor configured to drive the inner core to rotate about an axis of the outer barrel.

10. The infusion device as claimed in claim 1, further comprising a peristaltic infusion module connected to said liquid outlet for pumping the liquid drug outwardly from said liquid outlet.