KR20230157282A - System, device, and operating method for controlling drug infusion, and operating method thereof - Google Patents

Abstract

The present invention provides a drug injection device for injecting a drug into a living body; A blood sugar sensor that measures blood sugar in the living body; And a control device connected to the drug injection device through wireless communication to control the drug injection device, wherein the drug injection device controls the control received from the control device based on the communication link with the control device. According to a signal, an injection amount of a drug calculated based on a blood sugar value according to a first mode is injected into the living body, and based on the communication link with the control device being disconnected, a specified injection amount of a drug according to the second mode is injected into the living body. A system for controlling drug injection into a living body is provided.

Description

Device, operating method, and system for controlling drug infusion {System, device, and operating method for controlling drug infusion, and operating method thereof}

Embodiments of the present invention relate to a device for controlling drug injection, a method of operating the device, and a system.

Diabetes is a metabolic disorder that causes signs of blood sugar falling outside the normal range due to insufficient secretion of insulin or failure to function normally. Healthy people without diabetes maintain a constant blood sugar level because a small amount of insulin is continuously secreted from the pancreas, but diabetic patients who do not secrete insulin or only secrete a small amount maintain a constant blood sugar level even when they do not eat meals or snacks. You must inject basal insulin or use an insulin pump basal infusion.

For these diabetic patients, insulin injection must be administered continuously, and the amount of insulin injected must be carefully adjusted according to changes in blood sugar.

As described above, for diabetic patients who do not secrete insulin or secrete only a small amount of insulin, a device that can precisely inject insulin based on changes in blood sugar or a control device that can control the amount of insulin injected is needed.

For example, a device that controls insulin injection must be able to continuously receive the blood sugar value of a diabetic patient, but if the control device does not receive the patient's blood sugar value, it may inject a random dose of insulin that is not based on the blood sugar value. can be very dangerous to the patient. Therefore, there is a need for a method for controlling insulin injection so that no risk occurs to the patient when the control device fails to receive the patient's blood sugar value.

Alternatively, even if the control device normally receives the blood sugar value, if communication between the control device and the insulin injection device is lost, the insulin injection device has a problem injecting a dose of insulin based on the blood sugar value into the living body. Therefore, there is a need for a method for controlling insulin injection in an insulin injection device so that no risk occurs to the patient even when communication between the control device and the insulin injection device is disconnected.

The present invention was devised to improve the above problems, and its purpose is to provide a method of operating a device that controls drug injection when biometric values that determine the drug injection amount are not received. Additionally, the object is to provide a method of operating a drug injection device even when communication between the device for controlling drug injection and the drug injection device is disconnected.

However, these tasks are illustrative and do not limit the scope of the present invention.

A system for controlling drug injection according to an embodiment of the present invention includes a drug injection device for injecting a drug into a living body; A blood sugar sensor that measures blood sugar in the living body; And a control device connected to the drug injection device through wireless communication to control the drug injection device, wherein the drug injection device controls the control received from the control device based on the communication link with the control device. According to a signal, an injection amount of a drug calculated based on a blood sugar value according to a first mode is injected into the living body, and based on the communication link with the control device being disconnected, a specified injection amount of a drug according to the second mode is injected into the living body. It can be injected into a living body.

According to one embodiment, the drug injection device may inject the last injection amount of drug according to the first mode before switching to the second mode, based on the communication link with the control device being disconnected.

According to one embodiment, the drug injection device may retry communication with the control device after an injection amount update period has elapsed after injecting the last injection amount according to the first mode.

According to one embodiment, the drug injection device, as a result of retrying communication with the drug control device, based on a reconnection of the communication link with the control device, according to a control signal received from the control device, the first 1 Depending on the mode, the amount of drug calculated based on the blood sugar value can be injected into the living body.

According to one embodiment, the drug injection device, as a result of retrying communication with the device control device, based on the fact that the communication link with the control device is still disconnected, injects a specified amount of drug according to the second mode into the living body. can be injected.

According to one embodiment, the drug injection device identifies whether communication with the control device is reconnected at each injection dose update cycle for a specified time, based on the communication link with the control device being disconnected, and If communication with the control device is not reconnected for a period of time, the system switches to the second mode after the designated time has elapsed and the designated injection amount according to the second mode can be injected into the living body.

According to one embodiment, the drug injection device may inject the last injection amount of drug according to the first mode at each injection amount update cycle during the designated time period, unless communication with the control device is reconnected. there is.

According to one embodiment, the drug injection device receives a signal indicative of a blood sugar value from the control device while the communication link with the control device is connected and, based on the communication link with the control device being disconnected, It is possible to identify whether the last blood sugar value received from the control device is greater than or equal to a specified value.

According to one embodiment, the drug injection device injects the last injection amount of drug according to the first mode when the last blood sugar value received from the control device is greater than or equal to a specified value, and the last blood sugar value received from the control device is If it is below the specified value, the infusion can be stopped or the minimum injected amount of drug can be injected.

According to one embodiment, the minimum injection amount may be smaller than the specified injection amount according to the second mode.

According to one embodiment, the minimum injection amount and the designated injection amount according to the second mode may be preset in the drug injection device.

According to one embodiment, the drug injection device stops the injection because the last blood sugar value received from the control device is less than a specified value, or controls the injection amount every update cycle for a specified time even while the minimum injection amount of drug is injected. You can retry communication with the device.

According to one embodiment, when communication with the control device is reconnected within the specified time, the drug injection device calculates a blood sugar value according to the first mode according to a control signal received from the control device. The prescribed amount of drug can be injected into the living body.

According to one embodiment, the injection amount calculated based on the blood sugar value according to the first mode may be calculated by the control device based on the blood sugar value received from the blood sugar sensor.

A method of operating a drug injection device according to an embodiment of the present invention calculates a blood sugar value according to a first mode, based on a communication link with a control device being connected, and according to a control signal received from the control device. It may include an operation of injecting a specified injection amount of a drug into a living body, and an operation of injecting a designated injection amount of a drug according to a second mode into the living body based on a communication link with the control device being disconnected.

According to one embodiment, the method may further include injecting the last dose of drug according to the first mode before switching to the second mode, based on the communication link with the control device being disconnected. You can.

A control device for controlling drug injection according to an embodiment of the present invention includes a communication module that can be wirelessly connected to a drug injection device and a blood sugar sensor; and at least one processor, wherein the at least one processor operates in a first mode using the blood sugar value received from the blood sugar sensor based on a communication link with the blood sugar sensor being connected through the communication module. Obtaining a drug injection amount according to the drug injection amount, transmitting a control signal corresponding to the drug injection amount according to the first mode to the drug injection device, and based on the communication link with the blood sugar sensor being disconnected, a specified injection amount according to the second mode A corresponding control signal can be transmitted to the drug injection device through the communication module.

A method of operating a control device for controlling drug injection according to an embodiment of the present invention includes, based on a communication link with a blood sugar sensor being connected, the drug injection amount according to the first mode using the blood sugar value received from the blood sugar sensor. Obtaining and transmitting a control signal corresponding to the drug injection amount according to the first mode to the drug injection device, and based on the communication link with the blood sugar sensor being disconnected, corresponding to the specified injection amount according to the second mode It may include transmitting a control signal to the drug injection device.

Other aspects, features and advantages in addition to those described above will become apparent from the following drawings, claims and detailed description of the invention.

According to an embodiment of the present invention as described above, even when the drug injection amount calculated based on biological values is not known, the drug injection amount can be appropriately controlled, thereby preventing risk to the patient.

For example, the control device for controlling the amount of drug injection according to an embodiment of the present invention can adjust the amount of insulin administered to the patient when communication with the blood sugar sensor is interrupted.

Additionally, the drug injection device according to an embodiment of the present invention can control the amount of insulin injected to the patient even when communication with the control device is lost.

Of course, the scope of the present invention is not limited by these effects.

1 shows an example of the functional configuration of a system 100 for controlling drug injection according to one embodiment of the present invention.
Figure 2 is an example of the operation of the control device 10 according to an embodiment of the present invention.
Figure 3 is an example of the operation of the control device 10 according to an embodiment of the present invention.
Figure 4 is an example of signal flow between the blood sugar sensor 30, the control device 10, and the drug injection device 20 according to an embodiment of the present invention.
Figure 5 is an example of the operation of the drug injection device 20, according to an embodiment of the present invention.
Figure 6 is an example of the operation of the drug injection device 20 according to an embodiment of the present invention.
Figure 7 is an example of signal flow between the blood sugar sensor 30, the control device 10, and the drug injection device 20 according to an embodiment of the present invention.
Figure 8 is another example of the operation of the control device 10 according to an embodiment of the present invention.
Figure 9 is another example of the operation of the control device 10 according to an embodiment of the present invention.
Figure 10 is another example of the operation of the drug injection device 20 according to an embodiment of the present invention.
Figure 11 is another example of the operation of the drug injection device 20 according to an embodiment of the present invention.
Figure 12 is another example of the operation of the control device 10 according to an embodiment of the present invention.
Figure 13 is another example of the operation of the drug injection device 20 according to an embodiment of the present invention.
Figure 14 is another example of the operation of the control device 10 according to an embodiment of the present invention.
Figure 15 is another example of the operation of the control device 10 according to an embodiment of the present invention.
Figure 16 is another example of the operation of the drug injection device 20 according to an embodiment of the present invention.
Figure 17 is another example of the operation of the drug injection device 20 according to an embodiment of the present invention.

Since the present invention can be modified in various ways and can have various embodiments, specific embodiments will be illustrated in the drawings and described in detail in the detailed description. The effects and features of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along with the drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various forms.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. When describing with reference to the drawings, identical or corresponding components will be assigned the same reference numerals and redundant description thereof will be omitted. .

In the following embodiments, terms such as first and second are used not in a limiting sense but for the purpose of distinguishing one component from another component.

In the following examples, singular terms include plural terms unless the context clearly dictates otherwise.

In the following embodiments, terms such as include or have mean that the features or components described in the specification exist, and do not exclude in advance the possibility of adding one or more other features or components.

In the following embodiments, when areas, components, units, blocks, modules, etc. are connected, not only are the areas, components, units, blocks, and modules directly connected, but also the areas, components, units, blocks, and modules are connected. This also includes cases where other areas, components, parts, blocks, and modules are interposed and indirectly connected.

1 shows an example of the functional configuration of a system 100 for controlling drug injection according to one embodiment of the present invention.

Referring to FIG. 1, the system 100 for controlling drug injection includes a drug injection device 20, a blood sugar sensor 30, and a control device 10 capable of controlling drug injection of the drug injection device 20. may include.

However, it is not limited to this, and the system 100, drug injection device 20, blood sugar sensor 30, and control device 10 may further include other components, and some components may be omitted.

The blood sugar sensor 30 can measure blood sugar in a living body and may include a communication module 31 and a blood sugar measurement unit 32. Blood glucose sensor 30 may further include other components.

According to one embodiment, the blood sugar sensor 30 may be attached to a living body or may be a wearable device. The blood sugar sensor 30 may be in the form of a patch, for example.

The blood sugar measurement unit 32 can measure the blood sugar level of a living body in various ways. For example, the blood sugar measuring unit 32 may include an electrode coated with an enzyme, and can measure blood sugar by measuring a current flowing through the electrode. For another example, the blood sugar measurement unit 32 may measure blood sugar using biological blood through a needle. However, it is not limited to this, and the blood sugar measurement unit 32 can measure blood sugar in any way.

The blood sugar measurement unit 32 can measure blood sugar from biological blood at a designated cycle. The cycle in which the blood sugar measurement unit 32 measures blood sugar may be the same as the cycle in which the drug is injected into the living body through the drug injection device 20. Additionally, the cycle for measuring blood sugar may be the same as the injection dose update cycle for updating the drug injection dose to be injected into a living body. The designated period may be, for example, 5 minutes, but is not limited thereto.

Therefore, in the system 100 for controlling drug injection according to an embodiment of the present invention, the blood sugar sensor 30 measures blood sugar at designated cycles, and the control device 10 determines the drug injection amount based on the measured blood sugar. is updated, and based on the updated drug injection amount, the drug injection device 20 can inject the drug into the living body at the designated cycle. The drug may be insulin.

The communication module 31 of the blood sugar sensor 30 may support establishment of a wireless communication channel between the blood sugar sensor 30 and the control device 10 and communication through the established communication channel. The communication module 31 of the blood sugar sensor 30 may establish a wireless communication channel with the communication module 11 of the control device 10.

The communication module 31 of the blood sugar sensor 30 is a wireless communication module and may include, for example, a short-range wireless communication module. The communication module 31 is connected to the control device 10 (e.g., via a short-range communication network such as Bluetooth (BT), Bluetooth low energy (BLE), near field communication (NFC) network, or WiFi-direct. : Can communicate with the communication module (11)).

According to one embodiment, the communication module 31 of the blood sugar sensor 30 may transmit data or signals corresponding to the blood sugar value measured by the blood sugar sensor 30 to the control device 10. The communication module 31 may transmit data or signals corresponding to the updated blood sugar value to the control device 10 at designated intervals (eg, 5 minutes).

The control device 10 may transmit a control signal related to drug injection to the drug injection device 20. The control device 10 may calculate or obtain the drug injection amount based on the data or signal (i.e., data or signal corresponding to the blood sugar value) received from the blood sugar sensor 30, and provide a control signal corresponding to the drug injection amount. Can be generated and transmitted to the drug injection device 20.

The control device 10 may include a communication module 11, a processor 12, a display device 13, an input device 14, and a memory 15. The memory 15 may store a program 16 that calculates, obtains, or determines the drug injection amount. However, the present invention is not limited to this, and other components may be added to the control device 10 or some components (eg, display device 13 and input device 14) may be omitted.

The communication module 11 of the control device 10 may support establishment of a wireless communication channel between the blood sugar sensor 30 and the control device 10 and communication through the established communication channel. Additionally, the communication module 11 may support establishment of a wireless communication channel between the drug injection device 20 and the control device 10, and performance of communication through the established communication channel.

The communication module 11 of the control device 10 is a wireless communication module and may include, for example, a short-range wireless communication module. The communication module 31 connects the blood sugar sensor 30 (e.g. : Can communicate with the communication module 31) and the drug injection device 20 (e.g., the communication module 21).

However, it is not limited to this, and the communication module 11 of the control device 10 further includes, for example, a long-distance wireless communication module, and can be used to communicate with other electronic devices (e.g., smartphones, You can also communicate with a server, etc.). The communication module 11 of the control device 10 may be implemented with one or more chips.

According to one embodiment, the communication module 11 establishes a first link with the blood sugar sensor 30 (e.g., the communication module 31), and receives blood sugar values from the blood sugar sensor 30 at a specified period through the first link. Corresponding data can be received. The communication module 11 establishes a second link different from the first link with the drug injection device 20 (e.g., the communication module 21), and injects the drug injection device 20 through the second link. The control signal corresponding to can be transmitted at a designated period. The first link and the second link may be short-range wireless communication links. The first link and the second link may be based on at least one of Bluetooth, Bluetooth Low Energy (BLE), and WiFi-direct.

The processor 12 may, for example, execute software or programs 16 to perform various data processing or calculations. The data processing or calculation may include data processing or calculation to calculate the drug injection amount according to various situations. In various embodiments of the present invention, data processing or calculation for calculating the drug injection amount may vary depending on the situation. Processor 12 may load instructions or data into memory 15 (e.g., volatile memory), process the stored instructions or data, and store the resulting data in memory 15 (e.g., non-volatile memory).

Memory 15 may store various data used by at least one component (eg, processor 12) of control device 10. The data may include, for example, input data or output data for software (eg, program 15) and instructions related thereto. Memory 15 may include volatile memory or non-volatile memory. According to one embodiment of the present invention, the memory 15 may store a program 16 that calculates, obtains, or determines the amount of drug to be injected.

According to one embodiment of the present invention, the processor 12 may operate in the first mode or the second mode.

In the first mode, when the control device 10 receives data or a signal corresponding to the blood sugar value from the blood sugar sensor 30, the drug injection amount is calculated based on the received blood sugar value, and the drug injection amount is controlled corresponding to the calculated injection amount. This is a mode in which a signal is transmitted to the drug injection device 20.

The second mode is a mode in which, when the control device 10 fails to receive data or signals corresponding to the blood sugar value from the blood sugar sensor 30, a control signal corresponding to a predetermined injection amount is transmitted. To this end, the memory 15 may store the designated injection amount according to the second mode, based on user input. The designated infusion amount according to the second mode is an infusion amount that is not based on blood glucose values.

According to one embodiment of the present invention, the power consumption of the processor 12 in the first mode and the second mode may be different.

The display device 13 may visually provide information to the outside of the control device 10 (eg, a user). The display device 13 may include, for example, a display. For example, the display device 13 may display blood sugar values over time based on data received from the blood sugar sensor 30. For example, the display device 13 may display whether the communication link between the control device 10 and the blood sugar sensor 30 is connected or disconnected. The display device 13 can display whether the communication link between the control device 10 and the drug injection device 20 is connected or disconnected. For example, the display device 13 may display whether the processor 12 is operating in the first mode or the second mode.

According to one embodiment, the display device 13 may display (in real time) the drug injection amount of the drug injection device 20 in the current state. For example, the display device 13 may display the drug injection amount for a specified time (eg, injection amount update cycle) including the current time. For example, the display device 13 may display the drug injection amount calculated according to the first mode or the designated injection amount according to the second mode.

The input device 14 may receive commands or data to be used for at least one component of the control device 10 (e.g., the processor 12) from outside the control device 10 (e.g., a user). The input device 14 may include, for example, a touch screen or buttons.

The drug injection device 20 may receive a control signal related to drug injection from the control device 10 and inject the drug into the living body according to the control signal. Depending on the embodiment, the drug injection device 20 may inject a drug into a living body under the control of the control unit 22 even when communication with the control device 10 is interrupted. Drugs may include insulin.

According to one embodiment, the drug injection device 20 may be attached to a living body. The drug injection device 20 may be a wearable device. The drug injection device 20 may be in the form of a patch, for example.

The drug injection device 20 may include a communication module 21, a control unit 22, a driving unit 23, and a drug injection unit 24. However, the present invention is not limited to this, and other components may be added to the drug injection device 20 or some components may be omitted.

The communication module 21 of the drug injection device 20 may support establishment of a wireless communication channel between the drug injection device 20 and the control device 10, and performance of communication through the established communication channel.

The communication module 21 of the drug injection device 20 is a wireless communication module and may include a short-range wireless communication module. The communication module 21 is connected to the control device 10 (e.g., via a short-range communication network such as Bluetooth (BT), Bluetooth low energy (BLE), near field communication (NFC) network, or WiFi-direct. : Can communicate with the communication module (11)). The communication module 21 may be implemented as a chip.

The control unit 22 can control the driving unit 23 to inject a drug into a living body through the drug injection unit 24.

For example, the drug injection device 20 may include a drug storage unit (not shown) that accommodates a drug (eg, insulin), and the drug storage unit may be connected to the drug injection unit 24 . The drug injection unit 24 may include a needle, and the drug injection device 20 may be attached to the living body so that the needle penetrates or is inserted into the living body.

For example, the driving unit 23 may include a motor or a pump. For example, driving of the driving unit 23 may open or connect a connection portion connected from the drug storage unit to the drug injection unit 24. For example, the driving time or number of driving times of the driving unit 23 may correspond to the time or number of times the connection part is opened (or connected).

For example, when the connection part is opened once or for unit time, the dose (ie, unit dose) of the drug injected into the drug injection unit 24 may be fixed. Therefore, the control unit 22 can control the amount of drug injected through the drug injection unit 24 by controlling the driving time or number of driving times of the driving unit 23.

According to one embodiment of the present invention, the control unit 22 may operate in the first mode or the second mode.

The first mode is a mode in which, when a control signal corresponding to the drug injection amount is received from the control device 10, the drive unit 23 is controlled to inject an injection amount according to the received control signal. The drug injection amount may be an injection amount calculated by the control device 10 based on the blood sugar value.

The second mode is a mode in which the driver 23 is controlled to inject a predetermined injection amount when a control signal is not received from the control device 10. For this purpose, the drug injection device 20 may be preset to a designated injection amount according to the second mode, depending on the design. The designated infusion amount according to the second mode is an infusion amount that is not based on blood glucose values.

Figure 2 is an example of the operation of the control device 10 according to an embodiment of the present invention. The operations shown in FIG. 2 may be performed, for example, by the processor 12 of the control device 10 .

Referring to FIG. 2, the control device 10 may operate in the first mode in S101. Here, the first mode is an operation mode of the processor 12 of the control device 10. In the first mode, the communication link between the control device 10 and the blood sugar sensor 30 is normally connected, and the control device 10 receives data corresponding to the blood sugar value from the blood sugar sensor 30 through the communication link. , may represent a mode in which the drug injection amount is calculated based on the received blood sugar value and a control signal corresponding to the calculated injection amount is transmitted to the drug injection device 20.

In S102, the control device 10 may attempt to communicate with the blood sugar sensor 30 after the injection amount update cycle. The injection amount update cycle may be a cycle for newly calculating the drug injection amount based on changing blood sugar values. The injection amount update cycle may be, for example, 5 minutes, but is not limited thereto. The operation of attempting communication may include, for example, an operation in which the control device 10 requests blood sugar data from the blood sugar sensor 30.

In S103, the control device 10 can identify whether communication with the blood sugar sensor 30 was successful. For example, the control device 10 may identify that communication is successful based on receiving data or a signal corresponding to the blood sugar value from the blood sugar sensor 30. For example, if the control device 10 fails to receive data or a signal corresponding to the blood sugar value from the blood sugar sensor 30 within a predetermined time after attempting to communicate with the blood sugar sensor 30, it may identify that communication has failed. You can.

Based on successful communication with the blood sugar sensor 30, the control device 10 may proceed to S104 and operate in the first mode. Thereafter, the control device 10 may proceed to S102 and attempt to communicate with the blood sugar sensor 30 again after the injection amount update cycle has elapsed. That is, the control device 10 may repeat operations S102, S103, and S104 while the communication connection with the blood sugar sensor 30 is maintained.

Meanwhile, based on identifying that communication with the blood sugar sensor 30 has failed in S103, the control device 10 may proceed to S105 and operate in the second mode.

Detailed operations of the first mode operation (S104) and the second mode operation (S105) of the control device 10 will be described later with reference to FIG. 3.

Figure 3 is an example of the operation of the control device 10 according to an embodiment of the present invention.

Referring to FIG. 3, S101, S102, and S103 correspond to S101, S102, and S103 described with reference to FIG. 2, so their description will be omitted. S201 and S202 correspond to the first mode operation (S104) of the control device 10, and S203 corresponds to the second mode operation (S105) of the control device 10.

In S103, the control device 10 may operate in a first mode such as S201 and S202 based on successful communication with the blood sugar sensor 30. If communication with the blood sugar sensor 30 is successful, the control device 10 may receive data or signals corresponding to the blood sugar value through a communication link with the blood sugar sensor 30. Thereafter, in S201, the control device 10 may calculate or obtain the injection amount according to the first mode based on the received blood sugar value. The injection amount according to the first mode may be determined according to the blood sugar value. The higher the blood sugar value, the larger the injection amount according to the first mode may be. The control device 10 may generate a control signal corresponding to the injection amount calculated according to the first mode. In S202, the control device 10 may transmit a control signal corresponding to the injection amount to the drug injection device 20 through the communication module 11.

Meanwhile, in S103, the control device 10 may operate in a second mode such as S203 based on communication with the blood sugar sensor 30 failing. If the control device 10 does not receive data or a signal corresponding to the blood sugar value from the blood sugar sensor 30, it may generate a control signal corresponding to the designated injection amount according to the second mode. The designated injection amount according to the second mode may be previously stored in the memory 15 based on user input. The designated injection amount according to the second mode may be changed based on user input. In S203, the control device 10 may transmit a control signal corresponding to the specified injection amount according to the second mode to the drug injection device 20 through the communication module 11.

Figure 4 is an example of signal flow between the blood sugar sensor 30, the control device 10, and the drug injection device 20 according to an embodiment of the present invention.

Referring to FIG. 4, at S301, the control device 10 and the blood sugar sensor 30 may establish a first communication link, and the control device 10 and the drug injection device 20 may establish a second communication link. can do. The first communication link and the second communication link may be short-range wireless communication links. The first communication link and the second communication link may be based on at least one of Bluetooth, Bluetooth Low Energy (BLE), and WiFi-direct.

In S302, the blood sugar sensor 30 can measure the blood sugar level of a living body. For example, the blood sugar sensor 30 may measure blood sugar at designated intervals. In S303, the blood sugar sensor 30 may transmit blood sugar data corresponding to the measured blood sugar value to the control device 10 through the communication module 31. The control device 10 may receive blood sugar data from the blood sugar sensor 30 . In S304, the control device 10 may obtain or calculate the injection amount according to the first mode based on the received blood sugar value. In S305, the control device 10 may transmit a control signal corresponding to the calculated injection amount to the drug injection device 20. The drug injection device 20 may inject the injection amount according to the first mode into the living body according to the received control signal.

S303, S304, and S305 may correspond to the first mode operation of the control device 10.

In S306, the control device 10 may identify whether the communication link with the blood sugar sensor 30 is connected. For example, the control device 10 may transmit a signal requesting blood sugar data to the blood sugar sensor 30 and monitor whether a response comes within a predetermined time. The control device 10 may repeat the first mode operation (i.e., S303, S304, and S305) based on identifying that the communication link with the blood sugar sensor 30 is connected.

In S306, the control device 10 may perform a second mode operation (S307) based on identifying that the communication link with the blood sugar sensor 30 is disconnected. In S307, the control device 10 may transmit a control signal corresponding to the designated injection amount according to the second mode to the drug injection device 20. The drug injection device 20 may inject a designated injection amount according to the second mode into the living body according to the received control signal.

Figure 5 is an example of the operation of the drug injection device 20, according to an embodiment of the present invention. The operations shown in FIG. 5 may be performed, for example, by the control unit 22 of the drug injection device 20.

Referring to FIG. 5, the drug injection device 20 may operate in the first mode in S101-1. Here, the first mode may be an operation mode of the control unit 22 of the drug injection device 20. In the first mode, the communication link between the drug injection device 20 and the control device 10 is normally connected, and the drug injection device 20 performs control corresponding to the injection amount calculated based on the blood sugar value from the control device 10. Upon receiving the signal, the mode for injecting the drug may be indicated based on the received control signal.

In S102-1, the drug injection device 20 may attempt to communicate with the control device 10 after the injection amount update cycle. The injection amount update cycle may be a cycle in which the control device 10 newly calculates the drug injection amount based on the changing blood sugar value. The injection amount update cycle may be, for example, 5 minutes, but is not limited thereto. The operation of attempting communication may include, for example, an operation in which the drug injection device 20 requests a control signal corresponding to the drug injection amount from the control device 10.

In S103-1, the drug injection device 20 can identify whether communication with the control device 10 was successful. For example, the drug injection device 20 may identify that communication is successful based on receiving a control signal corresponding to the drug injection amount from the control device 10. For example, if the drug injection device 20 does not receive a control signal corresponding to the injection amount from the control device 10 within a predetermined time after attempting to communicate with the control device 10, it may identify that communication has failed. You can.

Based on successful communication with the control device 10, the drug injection device 20 may proceed to S104-1 and operate in the first mode. Thereafter, the drug injection device 20 may proceed to S102-1 and attempt to communicate with the control device 10 again after the injection amount update cycle has elapsed. That is, the drug injection device 20 can repeat operations S102-1, S103-1, and S104-1 while communication with the control device 10 is successful.

Meanwhile, based on identifying that communication with the control device 10 has failed in S103-1, the drug injection device 20 may proceed to S105-1 and operate in the second mode.

Detailed operations of the first mode operation (S104-1) and the second mode operation (S105-1) of the drug injection device 20 will be described later with reference to FIG. 6.

Figure 6 is an example of the operation of the drug injection device 20 according to an embodiment of the present invention.

Referring to FIG. 6, since S101-1, S102-1, and S103-1 correspond to S101-1, S102-1, and S103-1 explained with reference to FIG. 5, description thereof will be omitted. S201-1 and S202-1 correspond to the first mode operation (S104-1) of the drug injection device 20, and S203-1 corresponds to the second mode operation (S105-1) of the drug injection device 20. corresponds to

In S103-1, the drug injection device 20 may operate in a first mode such as S201-1 and S202-1, based on successful communication with the control device 10. If communication with the control device 10 is successful, the drug injection device 20 can receive the injection amount calculated based on the blood sugar value through a communication link with the control device 10. The calculated injection amount is an injection amount calculated or obtained by the control device 10 based on the blood sugar value received from the blood sugar sensor 30. Here, the drug injection device 20 receiving the calculated injection amount may include receiving a control signal corresponding to the calculated injection amount. Thereafter, in S202-1, the drug injection device 20 can inject the drug into the living body based on the reception. That is, the control unit 22 of the drug injection device 20 can control the drive unit 23 to inject the drug according to the injection amount according to the received control signal.

Meanwhile, in S103-1, the drug injection device 20 may operate in a second mode, such as S203-1, based on communication with the control device 10 failing. If the drug injection device 20 does not receive a control signal including the injection amount from the control device 10, it may inject the designated injection amount according to the second mode. The designated injection amount according to the second mode may be stored or set in advance in the drug injection device 20.

Thereafter, the drug injection device 20 continues to inject the specified injection amount according to the second mode every injection amount update cycle (e.g., 5 minutes), for example, without attempting to communicate with the control device 10 again, or Depending on the embodiment, drug injection may be stopped.

Figure 7 is an example of signal flow between the blood sugar sensor 30, the control device 10, and the drug injection device 20 according to an embodiment of the present invention.

Referring to FIG. 7, at S301, the control device 10 and the blood sugar sensor 30 may establish a first communication link, and the control device 10 and the drug injection device 20 may establish a second communication link. can do. The first communication link and the second communication link may be short-range wireless communication links, for example, based on at least one of Bluetooth, Bluetooth Low Energy (BLE), and WiFi-direct.

Since S302, S303, S304, and S305 correspond to S302, S303, S304, and S305 described with reference to FIG. 4, their description will be omitted.

In S311, when the drug injection device 20 receives a control signal through a communication link with the control device 10, it can inject the drug based on the reception. That is, the control signal received from the control device 10 may include an injection amount calculated based on the blood sugar value, and the drug injection device 20 may inject the drug according to the injection amount.

In S312, the drug injection device 20 may identify whether the communication link with the control device 10 is connected. For example, the drug injection device 20 may transmit a signal requesting a control signal to the control device 10 and monitor whether a response is received within a predetermined time. The drug injection device 20 may repeat the first mode operation (i.e., S305, S311) based on identifying that the communication link with the control device 10 is connected.

In S312, the drug injection device 20 may perform a second mode operation (S313) based on identifying that the communication link with the control device 10 is disconnected. In S313, the drug injection device 20 may inject a designated injection amount of drug into the living body according to the second mode.

Figure 8 is another example of the operation of the control device 10 according to an embodiment of the present invention.

Referring to FIG. 8, S101, S102, and S103 correspond to S101, S102, and S103 described with reference to FIG. 2, so their description will be omitted.

In S103, the control device 10 may operate in a first mode such as S201 and S202 based on successful communication with the blood sugar sensor 30. S201 and S202 correspond to S201 and S202 described with reference to FIG. 3.

The control device 10 attempts to communicate with the blood sugar sensor 30 to receive a blood sugar value from the blood sugar sensor 30 at each injection amount update cycle (S102), and while the communication connection with the blood sugar sensor 30 is maintained, The first mode operation of S102, S103, S201, and S202 can be repeated.

Meanwhile, the control device 10 may perform operations such as S401, S402, and S403 before operating in the second mode such as S203, based on the communication with the blood sugar sensor 30 failing in S103. Even if communication with the blood sugar sensor 30 fails, the control device 10 does not immediately switch the operation to the second mode for injecting the specified injection amount, but first injects the last injection amount according to the first mode as in S401 to the drug injection device. Through a communication link with 20, it can be retransmitted to the drug injection device 20. The last injection amount according to the first mode represents the most recently calculated injection amount based on the blood sugar value in the first mode. Meanwhile, transmitting the injection amount includes transmitting a control signal corresponding to the injection amount.

The drug injection device 20 may inject an injection amount equal to the most recently calculated injection amount in the first mode, based on the received control signal.

Meanwhile, the control device 10 may attempt to communicate with the blood sugar sensor 30 again in S402 when the injection amount update period has elapsed since transmitting the last injection amount according to the first mode.

In S403, the control device 10 may operate in a first mode such as S201 and S202 based on successful communication with the blood sugar sensor 30. That is, when communication with the blood sugar sensor 30 is successful, the control device 10 receives data corresponding to the blood sugar value from the blood sugar sensor 30, calculates the injection amount based on the received blood sugar value, and calculates the calculated A control signal corresponding to the injection amount can be transmitted to the drug injection device 20 (first mode).

In S403, the control device 10 may operate in a second mode, such as S203, based on the communication with the blood sugar sensor 30 failing.

That is, when communication fails, the control device 10 does not immediately switch to the second mode, but first transmits the most recently calculated injection amount in the first mode to the drug injection device 20, and then performs an injection amount update cycle. Even after , if communication with the blood sugar sensor 30 still fails, the operation can be switched to the second mode. Afterwards, for example, the control device 10 does not attempt to communicate with the blood sugar sensor 30 again, but continues to send a control signal corresponding to the specified injection amount according to the second mode every injection amount update cycle (e.g., 5 minutes). Transmission may be transmitted to the drug injection device 20, or transmission may be stopped depending on the embodiment. .

Figure 9 is another example of the operation of the control device 10 according to an embodiment of the present invention.

The operation of the control device 10 shown in FIG. 9 is the operation shown in FIG. 8 with only S501 added. Therefore, only the added parts will be explained.

According to one embodiment, when the communication link between the control device 10 and the blood sugar sensor 30 is disconnected in S103, the control device 10 does not immediately switch the operation to the second mode, but operates according to the first mode in S401. The last injection amount can be retransmitted to the drug injection device 20. After the next injection amount update cycle (eg, 5 minutes), the control device 10 may again identify whether the communication link with the blood sugar sensor 30 is connected (S402, S403). Based on identifying that the communication link with the blood sugar sensor 30 is still disconnected, the control device 10 may repeat operations S401 to S403 for a designated time without immediately switching the operation to the second mode. That is, the control device 10 repeats operations S401 to S403 when the specified time has not passed in S501, and proceeds to S203 when the specified time has passed in S501 to generate a control signal corresponding to the specified injection amount according to the second mode. can be transmitted to the drug injection device 20. The designated time may be, for example, 20 minutes, but is not limited thereto.

For example, the control device 10 attempts communication with the blood sugar sensor 30 every injection amount update cycle (e.g., 5 minutes) during the specified time (e.g., 20 minutes) (S402), and if communication is successful Switch to the first mode and perform operations S201 and S202, but if communication is not successful, the last injection amount according to the first mode can be repeatedly retransmitted (S401). The control device 10 attempts to communicate with the blood sugar sensor 30 at every injection amount update cycle (e.g., 5 minutes) for the specified time (e.g., 20 minutes) (S402), and returns to the second mode only after the specified time has elapsed. By switching the operation, a control signal corresponding to the specified injection amount according to the second mode can be transmitted (S203).

Figure 10 is another example of the operation of the drug injection device 20 according to an embodiment of the present invention.

Referring to FIG. 10, S101-1, S102-1, and S103-1 correspond to S101-1, S102-1, and S103-1 explained with reference to FIG. 5, so their description will be omitted.

In S103-1, the drug injection device 20 may operate in a first mode such as S201-1 and S202-1, based on successful communication with the control device 10. S201-1 and S202-1 correspond to S201-1 and S202-1 described with reference to FIG. 6.

The drug injection device 20 attempts to communicate with the control device 10 to receive a control signal from the control device 10 every injection amount update cycle (e.g., 5 minutes) (S102-1), and the control device 10 ) While the communication connection with ) is maintained, the first mode operation of S102-1, S103-1, S201-1, and S202-1 can be repeated.

Meanwhile, the drug injection device 20, based on the failure of communication with the control device 10 in S103-1, before operating in the second mode such as S203-1, S401-1, S402-1, and S403 The same operation as -1 can be performed. Even if communication with the control device 10 fails, the drug injection device 20 (or control unit 22) does not immediately switch the operation to the second mode for injecting the specified injection amount, but first performs the first mode as in S401-1. The final injection amount according to the mode can be injected into the living body once more. The last injection amount according to the first mode represents the injection amount most recently calculated by the control device 10 based on the blood sugar value. To this end, the control unit 22 of the drug injection device 20 may store the injection amount according to the first mode last received from the control device 10.

Meanwhile, the drug injection device 20 may attempt to communicate with the control device 10 again in S402-1 when the injection amount update period has passed since the last injection amount according to the first mode was injected.

In S403-1, the drug injection device 20 may operate in a first mode such as S201-1 and S202-1, based on successful communication with the control device 10. That is, if communication with the control device 10 is successful, the drug injection device 20 can inject the drug based on the control signal received from the control device 10 (first mode). The control signal may include information about the injection amount calculated by the control device 10 based on the blood sugar value.

In S403-1, the drug injection device 20 may operate in a second mode, such as S203-1, based on communication with the control device 10 failing.

That is, if communication fails, the drug injection device 20 does not immediately switch to the second mode, but first injects the amount most recently injected according to the first mode once more (S401-1), and then If communication with the control device 10 still fails even after the injection amount update cycle has passed, the operation can be switched to the second mode (S203-1). Thereafter, the drug injection device 20 continues to inject the specified injection amount according to the second mode every injection amount update cycle (e.g., 5 minutes), for example, without attempting to communicate with the control device 10 again, or Depending on the embodiment, drug injection may be stopped.

Figure 11 is another example of the operation of the drug injection device 20 according to an embodiment of the present invention. The operations of FIG. 11 may be performed by the control unit 22 of the drug injection device 20.

The operation of the drug injection device 20 shown in FIG. 11 is the operation shown in FIG. 10 with only S501-1 added. Therefore, only the added parts will be explained.

According to one embodiment, when the communication link between the drug injection device 20 and the control device 10 is disconnected in S103-1, the drug injection device 20 does not immediately switch to operating in the second mode, but S401-1 The last injection amount according to the first mode can be re-injected into the biological body. From this, after the injection amount update cycle (eg, 5 minutes), the drug injection device 20 can re-identify whether the communication link with the control device 10 is connected (S402-1, S403-1). Based on identifying that the communication link with the control device 10 is still disconnected, the drug injection device 20 (or the control unit 22) does not immediately switch the operation to the second mode but S401-1 to S403-1. The action can be repeated for a specified amount of time. That is, the drug injection device 20 repeats operations S401-1 to S403-1 when the specified time has not passed in S501-1, and proceeds to S203-1 when the specified time has passed in S501-1. 2 The specified injection amount according to the mode can be injected into the living body. The designated time may be, for example, 20 minutes, but is not limited thereto.

For example, the drug injection device 20 attempts communication with the control device 10 every injection amount update cycle (e.g., 5 minutes) during the specified time (e.g., 20 minutes) (S402-1), and communicates If this is successful, it switches to the first mode and performs operations S201-1 and S202-1, but if communication is not successful, the last injection amount according to the first mode can be repeatedly injected (S401-1). The drug injection device 20 attempts to communicate with the control device 10 at every injection amount update cycle (e.g., 5 minutes) for the specified time (e.g., 20 minutes) (S402-1), and only after the specified time has elapsed, the drug injection device 20 attempts to communicate with the control device 10. By switching the operation to mode 2, the specified injection amount according to the second mode can be injected (S203-1). Thereafter, the drug injection device 20 may continue to inject the specified injection amount according to the second mode every injection amount update cycle (e.g., 5 minutes), for example, without attempting communication with the control device 10 again. .

Figure 12 is another example of the operation of the control device 10 according to an embodiment of the present invention.

The operation of the control device 10 shown in FIG. 12 is the operation shown in FIG. 8 with only S601 and S602 added. Therefore, only the added parts will be explained.

According to one embodiment, when the communication link between the control device 10 and the blood sugar sensor 30 is disconnected in S103, the control device 10 does not immediately switch the operation to the second mode, but first performs the last operation according to the first mode. The injection amount is retransmitted to the drug injection device 20 (S401), and after the next injection amount update cycle, the control device 10 can identify again whether the communication link with the blood sugar sensor 30 is connected (S402, S403). .

Based on identifying in S403 that the communication link with the blood sugar sensor 30 is still disconnected, the control device 10 may proceed to S601 to determine whether the last blood sugar value is greater than or equal to a specified value. To this end, the control device 10 may store the last blood sugar value received from the blood sugar sensor 30. The last blood sugar value may represent the most recent blood sugar value received from the blood sugar sensor 30.

If the last blood sugar value is greater than or equal to the specified value in S601, the control device 10 may switch to the second mode and transmit a control signal corresponding to the specified injection amount according to the second mode to the drug injection device 20 ( S203).

If the last blood sugar value is less than the specified value in S601, the control device 10 does not proceed to the second mode and proceeds to S602, and sends a control signal corresponding to stopping the injection or a control signal corresponding to the minimum injection amount to the drug injection device ( 20). For this purpose, the control device 10 can store the minimum injection amount. For example, the control device 10 may store the minimum injection amount based on user input and may change the minimum injection amount based on user input. The minimum injection amount may be less than the specified injection amount according to the second mode. The drug injection device 20 may stop injection or inject the minimum injection amount according to the received control signal.

According to one embodiment, the control device 10 repeats operations S401, S402, and S403 for a specified time (e.g., 20 minutes), and if communication with the blood sugar sensor 30 fails even after the specified time has elapsed, You can also proceed to S601 and perform an operation according to the last blood sugar value.

Figure 13 is another example of the operation of the drug injection device 20 according to an embodiment of the present invention.

The operation of the drug injection device 20 (or control unit 22) shown in FIG. 13 is the operation shown in FIG. 10 with only S601-1 and S602-1 added. Therefore, only the added parts will be explained.

According to one embodiment, when the communication link between the drug injection device 20 and the control device 10 is disconnected in S103-1, the drug injection device 20 does not immediately switch operation to the second mode, but first operates in the first mode. The last injection amount according to the mode is injected (S401-1), and after the next injection amount update cycle, it is possible to identify again whether the communication link with the control device 10 is connected (S402-1, S403-1).

Based on identifying that the communication link with the control device 10 is still disconnected in S403-1, the drug injection device 20 may proceed to S601-1 to determine whether the last blood sugar value is greater than or equal to the specified value. there is. To this end, the drug injection device 20 may receive and store the blood sugar value (received by the control device 10 from the blood sugar sensor 30) from the control device 10. For example, the drug injection device 20 may receive a control signal from the control device 10 at each injection amount update cycle and also receive a signal corresponding to the blood sugar value. For example, the control signal that the drug injection device 20 receives from the control device 10 may include information about the blood sugar value. The last blood sugar value may indicate the most recent blood sugar value.

If the last blood sugar value is greater than or equal to the specified value in S601-1, the drug injection device 20 may switch to the second mode and perform the designated injection according to the second mode (S203-1).

If the last blood sugar value is less than the specified value in S601-1, the drug injection device 20 may proceed to S602-1 without proceeding to the second mode, and may stop the injection or inject the minimum injection amount. To this end, the drug injection device 20 can store the minimum injection amount. For example, the minimum injection amount may be preset in the drug injection device 20 according to design. The minimum injection amount may be less than the specified injection amount according to the second mode.

According to one embodiment, the drug injection device 20 repeats operations S401-1, S402-1, and S403-1 for a specified time (e.g., 20 minutes) and then continues to operate the control device 10 even after the specified time has elapsed. ), you can proceed to S601-1 and perform an operation according to the last blood sugar value.

Figure 14 is another example of the operation of the control device 10 according to an embodiment of the present invention.

Referring to FIG. 14, S101, S102, S103, S104, and S105 correspond to the above-described operations with the same reference number, so description will be omitted. Meanwhile, the first mode operation of S104 corresponds to S201 and S202, and the second mode operation of S105 corresponds to S203.

According to one embodiment, if the communication link between the control device 10 and the blood glucose sensor 30 is disconnected in S103, the control device 10 determines the last blood sugar value according to S701 before transmitting the last injection amount according to the first mode. You can first determine whether it is greater than or equal to the specified value. The last blood sugar value may represent the most recent blood sugar value received from the blood sugar sensor 30.

If the last blood sugar value is greater than or equal to the specified value in S701, the control device 10 may proceed to S702 and transmit the last injection amount according to the first mode. Transmitting the injection amount includes transmitting a control signal corresponding to the injection amount. After the next injection dose update cycle (e.g., 5 minutes), the control device 10 may identify whether the communication link with the blood glucose sensor 30 is connected (S703). When the communication link with the blood sugar sensor 30 is connected, the first mode operation can be performed by proceeding to S104. However, if the communication link with the blood sugar sensor 30 is still disconnected, the control device 10 performs the first mode operation according to S704. S702 to S704 can be repeated for a specified time. That is, as long as the communication link with the blood glucose sensor 30 is disconnected for a first specified time (e.g., 20 minutes), the control device 10 performs the last update according to the first mode every injection amount update period (e.g., 5 minutes). The injection amount can be transmitted to the drug injection device 20.

If the communication link with the blood sugar sensor 30 has been disconnected for the first designated time, the control device 10 can operate in the second mode only by proceeding to S105 after the first designated time has elapsed. That is, the control device 10 may transmit a control signal corresponding to the designated injection amount according to the second mode to the drug injection device 20 in S105.

Meanwhile, if the last blood sugar value is less than the specified value in S701, the control device 10 may proceed to S706 and transmit a control signal corresponding to the discontinuation of infusion to the drug injection device 20. Alternatively, although not shown, the control device 10 may transmit a control signal corresponding to the minimum injection amount to the drug injection device 20 in S706.

The control device 10 may then identify whether the communication link with the blood glucose sensor 30 is connected every infusion dose update cycle (e.g., 5 minutes) for a second designated period of time, and if the communication link with the blood glucose sensor 30 is connected. Proceeding to S104, the first mode operation can be performed (S706, S707, S708).

However, the control device 10 sends a control signal corresponding to the infusion interruption every infusion dose update cycle (e.g., 5 minutes) as long as the communication link with the blood glucose sensor 30 is disconnected for a second designated time period (e.g., 20 minutes). It can be transmitted to the drug injection device 20 (S706, S707, S708). Alternatively, although not shown, the control device 10 may transmit a control signal corresponding to the minimum injection amount to the drug injection device 20 instead of a control signal corresponding to the interruption of injection in S706.

The first designated time and the second designated time may be the same or different from each other.

If the communication link with the blood sugar sensor 30 has been disconnected for a second designated time, the control device 10 proceeds to S709 after the second designated time and sends a control signal corresponding to the interruption of the infusion (or a minimum infusion amount). A corresponding control signal) may be transmitted to the drug injection device 20 and, for example, communication with the blood sugar sensor 30 may no longer be attempted.

Figure 15 is another example of the operation of the control device 10 according to an embodiment of the present invention.

The operation of the control device 10 (or processor 12) shown in FIG. 15 is the operation shown in FIG. 14 with only S801 and S802 added. Therefore, only the added parts will be explained.

According to one embodiment, if the communication link between the control device 10 and the blood sugar sensor 30 is disconnected in S103, the control device 10 first determines whether the last blood sugar value is greater than the specified value as in S701. The last injection amount according to the first mode is retransmitted to the drug injection device 20 (S801), and if communication with the blood sugar sensor 30 is successful after the next injection amount update cycle, the first mode operation is performed, but the blood sugar level after the next injection amount update cycle is performed. If communication with the sensor 30 still fails, the control device 10 may proceed to S701 to determine whether the last blood sugar value is greater than or equal to a specified value.

The subsequent operation corresponds to what was described with reference to FIG. 14.

According to one embodiment, the control device 10 repeats operations S801 and S802 for a specified time, and if communication with the blood sugar sensor 30 fails even after the specified time has elapsed, the control device 10 proceeds to S701 according to the last blood sugar value. You can also perform actions.

Figure 16 is another example of the operation of the drug injection device 20 according to an embodiment of the present invention.

Referring to FIG. 16, S101-1, S102-1, S103-1, S104-1, and S105-1 correspond to the above-described operations with the same reference number, so description will be omitted. Meanwhile, the first mode operation of S104-1 corresponds to S201-1 and S202-1, and the second mode operation of S105-1 corresponds to S203-1.

According to one embodiment, if the communication link between the drug injection device 20 and the control device 10 is disconnected in S103-1, the drug injection device 20 performs S701- before injecting the last injection amount according to the first mode. According to 1, it is possible to first determine whether the last blood sugar value is greater than or equal to the specified value. The last blood sugar value may represent the most recent blood sugar value received from the control device 10.

If the last blood sugar value is greater than or equal to the specified value in S701-1, the drug injection device 20 may proceed to S702-1 and inject the last injection amount according to the first mode. After the next injection amount update cycle (eg, 5 minutes), the drug injection device 20 may identify whether the communication link with the control device 10 is connected (S703-1). If the communication link with the control device 10 is connected, the first mode operation can be performed by proceeding to S104-1, but if the communication link with the control device 10 is still disconnected, the drug injection device 20 may perform S704-1. S702-1 to S704-1 may be repeated for a first designated time according to 1. That is, the drug injection device 20, as long as the communication link with the control device 10 is disconnected for a first designated time (e.g., 20 minutes), according to the first mode every injection amount update cycle (e.g., 5 minutes). The final injection volume can be injected.

If the communication link with the control device 10 has been disconnected for a first designated time, the drug injection device 20 can operate in the second mode only by proceeding to S105-1 after the first designated time has elapsed. . That is, the drug injection device 20 can inject a designated injection amount according to the second mode in S105-1.

Meanwhile, if the last blood sugar value in S701-1 is less than the specified value, the drug injection device 20 may proceed to S706-1 and stop the injection. Alternatively, although not shown, the drug injection device 20 may inject the minimum injection amount in S706-1.

The drug injection device 20 may then identify whether the communication link with the control device 10 is connected every infusion dose update cycle (e.g., 5 minutes) for a second designated period of time, and determine whether the communication link with the control device 10 is connected. In this case, the first mode operation can be performed by proceeding to S104-1 (S706-1, S707-1, S708-1).

However, the drug injection device 20 is in an infusion state as long as the communication link with the control device 10 is disconnected for a second specified period of time (e.g., 20 minutes) or, although not shown, performs an infusion dose update cycle (e.g., 5 The minimum injection amount can be injected every minute (S706-1, S707-1, S708-1).

The first designated time and the second designated time may be the same or different from each other.

If the communication link with the control device 10 has been disconnected for a second specified time, the drug injection device 20 proceeds to S709-1 after the second specified time and maintains the injection interruption state, for example. For example, communication with the control device 10 may no longer be attempted.

Figure 17 is another example of the operation of the drug injection device 20 according to an embodiment of the present invention.

The operation of the drug injection device 20 (or control unit 22) shown in FIG. 17 is the operation shown in FIG. 16 with only S801-1 and S802-1 added. Therefore, only the added parts will be explained.

According to one embodiment, if the communication link between the drug injection device 20 and the blood sugar sensor 30 is disconnected in S103-1, the drug injection device 20 determines whether the last blood sugar value is more than a specified value as in S701-1. Before determining, the last injection amount according to the first mode is first injected (S801-1), and if communication with the control device 10 is successful after the next injection amount update cycle, the first mode operation is performed, but after the next injection amount update cycle If communication with the control device 10 still fails, the drug injection device 20 may proceed to S701-1 to determine whether the last blood sugar value is greater than or equal to a specified value.

The subsequent operation corresponds to what was described with reference to FIG. 16.

According to one embodiment, the drug injection device 20 repeats operations S801-1 and S802-1 for a specified time, and then, if communication with the control device 10 fails even after the specified time has elapsed, the drug injection device 20 returns to S701-1. You can also proceed and perform actions according to the last blood sugar value.

The present invention has been described with reference to an embodiment shown in the drawings, but this is merely illustrative and those skilled in the art will understand that various modifications and variations of the embodiment are possible therefrom. Therefore, the true scope of technical protection of the present invention should be determined by the technical spirit of the attached patent claims.

Claims (8)

A drug injection device for injecting drugs into a living body;
A blood sugar sensor that measures blood sugar in the living body; and
A control device connected to the drug injection device through wireless communication to control the drug injection device,
The drug injection device,
Based on the communication link with the control device being connected, injecting an injected amount of drug into the living body calculated based on the blood sugar value according to a first mode according to a control signal received from the control device,
Injecting a designated injection amount of drug according to a second mode into the living body based on the communication link with the control device being disconnected,
A system for controlling drug injection. According to paragraph 1,
The drug injection device,
injecting the last dose of drug according to the first mode before switching to the second mode, based on the communication link with the control device being disconnected,
A system for controlling drug injection. According to paragraph 2,
The drug injection device,
After injecting the last injection amount according to the first mode, communication with the control device is retried after an injection amount update period, and based on the communication link with the control device being reconnected as a result of the retry, Injecting an amount of drug calculated based on the blood sugar value into the living body according to the first mode according to a control signal received from the control device,
A system for controlling drug injection. According to paragraph 2,
The drug injection device,
After injecting the last injection amount according to the first mode, communication with the control device is retried after an injection amount update period, and based on the retry, the communication link with the control device is still disconnected, Injecting a designated injection amount of drug according to the second mode into the living body,
A system for controlling drug injection. According to paragraph 2,
The drug injection device,
Based on the communication link with the control device being disconnected, injecting the last injection amount of the drug according to the first mode every injection dose update cycle unless communication with the control device is reconnected for a specified period of time,
A system for controlling drug injection. According to paragraph 1,
The drug injection device,
While a communication link with the control device is connected, receive a signal indicative of a blood sugar value from the control device;
Identifying whether the last blood sugar value received from the control device is greater than or equal to a specified value, based on the communication link with the control device being disconnected,
A system for controlling drug injection. According to clause 6,
The drug injection device,
If the last blood sugar value received from the control device is greater than or equal to a specified value, inject the last amount of drug injected according to the first mode,
Stopping the infusion or injecting the minimum amount of drug to be injected if the last blood sugar value received from the control device is below the specified value,
A system for controlling drug injection. In clause 7,
The drug injection device,
Even when the infusion is stopped because the last blood sugar value received from the control device is less than a specified value or the minimum injected amount of drug is injected, communication with the control device is retried every infusion dose update cycle for a specified time,
A system for controlling drug injection.