CROSS-REFERENCE TO RELATED APPLICATION(S)

This application is based on and claims priority under 35 U.S.C. § 119 to Korean Patent Application No. 10-2018-0154619, filed on Dec. 4, 2018, in the Korean Intellectual Property Office, the disclosure of which is incorporated by reference herein its entirety.

BACKGROUND

1. Field

The disclosure relates to a method for guiding a measurement of a biological signal in a wearable device.

2. Description of Related Art

An electronic device may measure a user's biological signal using a sensor. The biological signal may include, for example, at least one of heart rate, oxygen saturation, blood pressure, and/or blood glucose. Because the biological signal may be serve as a health indicator, measurement may be required at regular intervals of time. For example, because the blood glucose may be predictably maximal at a set time after a meal (e.g., 30 minutes to 2 hours), and may be predictably minimal when there user has not eaten and the stomach is empty, the user of the electronic device may be required to measure blood glucose at a predetermined time following meal, or a longer predetermined time in which the user is predicted to have no food content in the stomach. In another example, when the blood pressure is equal to or higher than a critical value for a predetermined after an end of an exercise time (e.g., within 2 minutes), the incidence of stroke may increase. Therefore, the user may be required to measure blood pressure after terminating physical exercise.

The above information is presented as background information only to assist with an understanding of the disclosure. No determination has been made, and no assertion is made, as to whether any of the above might be applicable as prior art with regard to the disclosure.

SUMMARY

Methods for measuring a biological signal may vary. For example, an electronic device may measure the biological signal by collecting venous or capillary blood of a user, and/or measure the biological signal by an optical or electrical method, without blood collection.

A blood analyzer that collects the venous blood, or a self-monitoring blood glucose measurement device (SMBG) that collects the capillary blood may both accurately measure a biological signal (e.g., a blood glucose) from the blood of the user. However, because the blood collection process involves the discomfort of pain for a user, and the blood analyzer is typically not very portable, the continuous measurement of blood sugar can be limited or impeded.

When the electronic device includes a wearable device coupled to a body part of the user, the electronic device may continuously monitor the biological signal using a biometric information sensor, such as a photoplethysmogram (PPG) sensor. However, because of the limitations on a physical size of the wearable device, the measurement accuracy of the biometric information sensor in the wearable device may be lower than that of other comparable electronic devices (e.g., the blood analyzer or the self-monitoring blood glucose measurement).

Certain embodiments disclosed in the disclosure may provide a method for continuously monitoring the biological signal using the wearable device and for increasing the accuracy of the measurement.

Aspects of the disclosure are to address at least the above-mentioned problems and/or disadvantages and to provide at least the advantages described below. Accordingly, an aspect of the disclosure is to provide an electronic device including a housing, a display visible through a first portion of the housing, a photoplethysmogram (PPG) sensor exposed through a second portion of the housing, a wireless communication circuit, a processor operatively connected to the display, the PPG sensor, and the wireless communication circuit, and a memory operatively connected to the processor, wherein the memory stores instructions executable by the processor to cause the electronic device to: detect a first blood glucose value using the PPG sensor, based at least in part on the detected first blood glucose value, display a notification on the display prompting measurement of blood glucose using an external electronic device, and receive a transmission through the wireless communication circuit of a second blood glucose value as detected by the external electronic device.

Accordingly, another aspect of the disclosure is to provide a method for a wearable device, including when the wearable electronic device is coupled to a body part of a user, detecting a first blood glucose value using the PPG sensor, based at least in part on the detected first blood glucose value, displaying a notification on a display prompting measurement of blood glucose using an external electronic device, and receiving a transmission through a wireless communication circuit of a second blood glucose value, as detected by the external electronic device.

Accordingly, another aspect of the disclosure is to provide a wearable device capable of being worn on a body part of a user including at least one attachment member capable of being detached from the body part of the user, a housing coupled to the at least one attachment member, a display visible through a first portion of the housing, a photoplethysmogram (PPG) sensor exposed through a second portion of the housing opposite to the first portion, a wireless communication circuit included in the housing, a processor operatively connected to the display, the PPG sensor, and the wireless communication circuit, and a memory operatively coupled to the processor, wherein the memory stores instructions executable by the processor to cause the wearable device to: detect first blood glucose values using the PPG sensor, control the display to display a notification prompting measurement of second blood glucose values using an external electronic device at least partially based on the detected first blood glucose values, receive a transmission of the second blood glucose values as detected by the external electronic device using the wireless communication circuit, and calibrate the PPG sensor based at least partially on the received second blood glucose values.

Other aspects, advantages, and salient features of the disclosure will become apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses certain embodiments of the disclosure.

