Wearable ECG and EDA with multi-lead and single-lead connections

A method for obtaining a biometric measurement via a plurality of electrodes provided in a housing of a wearable computing device, the method comprising:

• determining, based on first data output by a first electrode among the plurality of electrodes, a first contact formed between a first body part of a user and the first electrode, wherein the first electrode is provided in a lower portion of the housing and is positioned to be in contact with the first body part while the wearable computing device is worn by the user;
• determining, based on the first data, whether the first contact formed between the first body part and the first electrode is sufficient based on whether the first contact is maintained more than a first threshold duration of time;
• when the first threshold duration of time is not satisfied, providing a first output via a user interface instructing the user to adjust at least one of the first body part or the wearable computing device;
• when the first threshold duration of time is satisfied, providing a second output via a user interface instructing the user to bring a second body part of the user into contact with a second electrode among the plurality of electrodes;
• determining, based on second data output by the second electrode, a second contact formed between the second body part and the second electrode, wherein the second electrode is provided in an upper portion of the housing and is positioned out of contact from the first body part of the user when the wearable computing device is worn by the user, wherein the second electrode is configured to receive a contact from the second body part of the user and the upper portion and the lower portion of the housing are electrically isolated from one another;
• determining, based on the second data, whether the second contact formed between the second body part and the second electrode is sufficient based on whether the second contact is maintained more than a second threshold duration of time,
• when the second threshold duration of time is not satisfied, providing a third output via the user interface instructing the user to adjust at least one of the second body part or the wearable computing device,
• when the second threshold duration of time is satisfied, providing a fourth output via the user interface instructing the user to maintain the first contact and the second contact,
• acquiring, while the first contact and the second contact are maintained, the first data via the first electrode and the second data via the second electrode,
• when the first data and the second data are acquired while the first contact and the second contact are maintained for less than a third threshold duration of time, determining collection of the first data and the second data is incomplete, and
• when the first data and the second data are acquired while the first contact and the second contact are maintained for more than the third threshold duration of time, evaluating the first data and the second data and outputting a biometric measurement based on the first data and the second data acquired while the first contact and the second contact were maintained for more than a third threshold duration of time.

A non-transitory computer readable medium storing instructions which, when executed by a processor, cause the processor to perform operations for obtaining a biometric measurement via a plurality of electrodes provided in a housing of a wearable computing device, the operations comprising:

• determining, based on first data output by a first electrode among the plurality of electrodes, a first contact formed between a first body part of a user and the first electrode, wherein the first electrode is provided in a lower portion of the housing and is positioned to be in contact with the first body part while the wearable computing device is worn by the user;
• determining, based on the first data, whether the first contact formed between the first body part and the first electrode is sufficient based on whether the first contact is maintained more than a first threshold duration of time;
• when the first threshold duration of time is not satisfied, providing a first output via a user interface instructing the user to adjust at least one of the first body part or the wearable computing device;
• when the first threshold duration of time is satisfied, providing a second output via the user interface instructing the user to bring a second body part of the user into contact with a second electrode among the plurality of electrodes;
• determining, based on second data output by the second electrode, a second contact formed between the second body part and the second electrode, wherein the second electrode is provided in an upper portion of the housing and is positioned out of contact from the first body part of the user when the wearable computing device is worn by the user, wherein the second electrode is configured to receive a contact from the second body part of the user and the upper portion and the lower portion of the housing are electrically isolated from one another;
• determining, based on the second data, whether the second contact formed between the second body part and the second electrode is sufficient based on whether the second contact is maintained more than a second threshold duration of time;
• when the second threshold duration of time is not satisfied, providing a third output via the user interface instructing the user to adjust at least one of the second body part or the wearable computing device;
• when the second threshold duration of time is satisfied, providing a fourth output via the user interface instructing the user to maintain the first contact and the second contact;
• acquiring, while the first contact and the second contact are maintained, the first data via the first electrode and the second data via the second electrode;
• when the first data and the second data are acquired while the first contact and the second contact are maintained for less than a third threshold duration of time, determining collection of the first data and the second data is incomplete, and
• when the first data and the second data are acquired while the first contact and the second contact are maintained for more than the third threshold duration of time, evaluating the first data and the second data and outputting a biometric measurement based on the first data and the second data acquired while the first contact and the second contact were maintained for more than a third threshold duration of time.