Related Experiment Video
Updated: Aug 23, 2025
10:03
Conformable Wearable Electrodes: From Fabrication to Electrophysiological Assessment
Published on: July 22, 2022
4.5K
Design and Application of a Flexible Blood Oxygen Sensing Array for Wearable Devices
Wen-Cheng Kuo1, Tzu-Chien Wu1, Jun-Sheng Wang1
1Department of Mechatronics Engineering, National Kaohsiung University of Science and Technology, No. 2 Jhuoyue Rd., Nanzih, Kaohsiung 811532, Taiwan.
Micromachines
|October 27, 2022
Summary
This study developed a flexible blood oxygen sensing system to improve accuracy during movement. The wearable device uses a 3x3 array to prevent errors from poor fit or motion, enhancing blood oxygen monitoring.
Area of Science:
- Biomedical Engineering
- Wearable Technology
- Optical Sensing
Background:
- Wearable oximeters suffer accuracy issues due to motion and poor sensor fit.
- Stray light and light leakage further degrade blood oxygen concentration calculations.
Purpose of the Study:
- To develop a flexible, wearable blood oxygen sensing system using a 3x3 array.
- To mitigate errors caused by sensor movement and improper skin contact.
Main Methods:
- Utilized a reflective-type blood oxygen sensing chip with light transmission and reception.
- Integrated the chip using a flip chip package on a flexible parylene substrate.
- Employed a time division pulse modulation method for sequential measurement at nine locations.
Main Results:
- Developed a flexible sensor array conforming to wrist curvature for radial artery placement.
- Implemented dynamic scanning of the sensor array to extract accurate light intensity.
- Successfully obtained blood oxygen concentration by preventing errors from movement and improper fit.
Conclusions:
- The novel flexible blood oxygen sensing system enhances accuracy in wearable devices.
- Dynamic array scanning effectively corrects for motion artifacts and poor sensor fit.
- This technology offers improved reliability for continuous blood oxygen monitoring during physical activity.
Related Concept Videos
01:24Pulse Oximetry
387
Pulse oximetry, or SpO2, is a non-invasive method for continuously monitoring arterial oxygen saturation (SaO2). This procedure involves attaching a probe or sensor to the patient's fingertip, forehead, earlobe, or nose bridge. The sensor works by detecting changes in oxygen saturation levels through light signals generated by the oximeter and reflected by the pulsing blood under the probe.
Purpose
Average SpO2 values are greater than 95%. If the readings fall below 90%, it indicates that...
Purpose
Average SpO2 values are greater than 95%. If the readings fall below 90%, it indicates that...
387
01:19Guidelines For Measuring Vital Signs
1.9K
Following these guidelines can help nurses accurately measure vital signs, assess changes in patient conditions, and provide timely treatment when necessary. Adhering closely to the guidelines ensures the accuracy and reliability of the results.
Before taking a patient's vital signs, a nurse would consider and assess the patient's comfort level and ensure appropriate equipment is available.
Before taking a patient's vital signs, a nurse would consider and assess the patient's comfort level and ensure appropriate equipment is available.
1.9K
01:19Special considerations while measuring oxygen saturation
651
Assessing respiratory rate concurrently with pulse measurement is fundamental to patient care, providing valuable insights into the patient's respiratory function. The normal breathing rate for an adult usually falls within a normal range of 12 to 20 breaths per minute. Abnormal respiratory rates can signal underlying health conditions or the need for immediate intervention.
Ensuring accuracy in vital sign recordings while prioritizing patient comfort and minimizing anxiety is...
Ensuring accuracy in vital sign recordings while prioritizing patient comfort and minimizing anxiety is...
651
01:30Equipments Used To Measure Blood Pressure
1.1K
Direct Method
This invasive approach involves cannulating a peripheral artery. During each cardiac contraction, pressure generates mechanical motion within the catheter, transmitted through rigid, fluid-filled tubing to a transducer. This transducer converts mechanical motion into electrical signals displayed as waveforms on a monitor. An automatic flushing system prevents blood backflow. Due to the potential risk of unexpected arterial blood loss, this method is primarily used in intensive...
This invasive approach involves cannulating a peripheral artery. During each cardiac contraction, pressure generates mechanical motion within the catheter, transmitted through rigid, fluid-filled tubing to a transducer. This transducer converts mechanical motion into electrical signals displayed as waveforms on a monitor. An automatic flushing system prevents blood backflow. Due to the potential risk of unexpected arterial blood loss, this method is primarily used in intensive...
1.1K