scholarly journals Verification and first test measurement of a microwave-based vital sign monitor

2019 ◽  
Vol 17 ◽  
pp. 249-256
Author(s):  
Daniel Schmiech ◽  
Aly Marnach ◽  
Andreas R. Diewald
Keyword(s):  
Monitoring System ◽  
Premature Infants ◽  
Vital Sign ◽  
Region Of Interest ◽  
Radar System ◽  
Sensor System ◽  
Breathing Rate ◽  
Test Measurement ◽  
Reflected Signal

Abstract. The authors present a microwave-based vital sign monitoring system to detect the breathing rate of premature infants in a baby incubator. The sensor is a four channel I/Q-radar system with adapted antennas to cover the predefined region of interest on the patient surface of the incubator. In order to prove the correct illumination of the reclining area an electromotive actuator and a pneumatic dummy is used. With a periodic and repeatable breathing simulation the reflected signal in the sensor system is measured and evaluated. In the publication the radar system in the baby incubator, the electromotive actuator and the infant dummy are presented.

A concurrent dual-band radar sensor for vital sign tracking and short-range positioning

Frequenz ◽  
2020 ◽  
Vol 74 (11-12) ◽  
pp. 369-376
Author(s):  
Zi-Kai Yang ◽  
Wen-Kui Liu ◽  
Sheng Zhao ◽  
Xiang-Dong Huang
Keyword(s):  
Monitoring System ◽  
Vital Sign ◽  
Short Range ◽  
Vital Signs ◽  
Radar System ◽  
System Level ◽  
Dual Band ◽  
Two Dimensional ◽  
Radar Sensor ◽  
Life Activity

AbstractThis paper presents a concurrent dual-band radar system for noncontact tracking of vital signs (e.g., respiration and heartbeat), and indoor short-range localization. The proposed sensor, which has been achieved with our own customized concurrent dual-band subsystems, operates at 1.67 and 2.06 GHz synchronously. Based on the Doppler principle, tiny vital signs are obtained by analysis of spectrum of the signals received at each individual frequency band. Moreover, the location of a target is estimated based on the phase difference between these two closely spaced frequencies. The azimuth information is obtained by beam scanning. Combining the results of range and azimuth information allows the radar system to plot two-dimensional maps. As a result, the proposed radar is capable of monitoring human’s life activities and tracking the location of individuals continuously. System-level experiments were carried out to reveal the versatile capability of the life activity monitoring system.

Antenna Design of 60-GHz Micro-Radar System-In-Package for Noncontact Vital Sign Detection

2012 ◽  
Vol 11 ◽  
pp. 1702-1705 ◽  
Author(s):  
Tze-Min Shen ◽  
Te-Yu Jason Kao ◽  
Ting-Yi Huang ◽  
Jianxuan Tu ◽  
Jenshan Lin ◽  
...  
Keyword(s):  
Vital Sign ◽  
Radar System ◽  
Antenna Design ◽  
60 Ghz ◽  
Sign Detection

scholarly journals Reliability of a wearable wireless patch for continuous remote monitoring of vital signs in patients recovering from major surgery: a clinical validation study from the TRaCINg trial

BMJ Open ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. e031150 ◽  
Author(s):  
Candice Downey ◽  
Shu Ng ◽  
David Jayne ◽  
David Wong
Keyword(s):  
Monitoring System ◽  
Vital Sign ◽  
Vital Signs ◽  
University Hospital ◽  
Secondary Outcome ◽  
Major Surgery ◽  
Limits Of Agreement ◽  
Temperature Bias ◽  
Vital Signs Monitoring ◽  
Recorded Data

ObjectiveTo validate whether a wearable remote vital signs monitor could accurately measure heart rate (HR), respiratory rate (RR) and temperature in a postsurgical patient population at high risk of complications.DesignManually recorded vital signs data were paired with vital signs data derived from the remote monitor set in patients participating in the Trial of Remote versus Continuous INtermittent monitoring (TRaCINg) study: a trial of continuous remote vital signs monitoring.SettingSt James’s University Hospital, UK.Participants51 patients who had undergone major elective general surgery.InterventionsThe intervention was the SensiumVitals monitoring system. This is a wireless patch worn on the patient’s chest that measures HR, RR and temperature continuously. The reference standard was nurse-measured manually recorded vital signs.Primary and secondary outcome measuresThe primary outcomes were the 95% limits of agreement between manually recorded and wearable patch vital sign recordings of HR, RR and temperature. The secondary outcomes were the percentage completeness of vital sign patch data for each vital sign.Results1135 nurse observations were available for analysis. There was no clinically meaningful bias in HR (1.85 bpm), but precision was poor (95% limits of agreement −23.92 to 20.22 bpm). Agreement was poor for RR (bias 2.93 breaths per minute, 95% limits of agreement −8.19 to 14.05 breaths per minute) and temperature (bias 0.82°C, 95% limits of agreement −1.13°C to 2.78°C). Vital sign patch data completeness was 72.8% for temperature, 59.2% for HR and 34.1% for RR. Distributions of RR in manually recorded measurements were clinically implausible.ConclusionsThe continuous monitoring system did not reliably provide HR consistent with nurse measurements. The accuracy of RR and temperature was outside of acceptable limits. Limitations of the system could potentially be overcome through better signal processing. While acknowledging the time pressures placed on nursing staff, inaccuracies in the manually recorded data present an opportunity to increase awareness about the importance of manual observations, particularly with regard to methods of manual HR and RR measurements.

scholarly journals Detecting Specific Health-Related Events Using an Integrated Sensor System for Vital Sign Monitoring

Sensors ◽  
2009 ◽  
Vol 9 (9) ◽  
pp. 6897-6912 ◽  
Author(s):  
Mourad Adnane ◽  
Zhongwei Jiang ◽  
Samjin Choi ◽  
Hoyoung Jang
Keyword(s):  
Vital Sign ◽  
Sensor System ◽  
Integrated Sensor ◽  
Health Related ◽  
Specific Health

scholarly journals Research on Non-Contact Monitoring System for Human Physiological Signal and Body Movement

Biosensors ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 58 ◽  
Author(s):  
Qiancheng Liang ◽  
Lisheng Xu ◽  
Nan Bao ◽  
Lin Qi ◽  
Jingjing Shi ◽  
...  
Keyword(s):  
Monitoring System ◽  
Doppler Radar ◽  
Body Movement ◽  
Radar System ◽  
The Body ◽  
Body Motion ◽  
Physiological Monitoring ◽  
Physiological Signal ◽  
Signal Monitoring ◽  
Monitoring Devices

With the rapid increase in the development of miniaturized sensors and embedded devices for vital signs monitoring, personal physiological signal monitoring devices are becoming popular. However, physiological monitoring devices which are worn on the body normally affect the daily activities of people. This problem can be avoided by using a non-contact measuring device like the Doppler radar system, which is more convenient, is private compared to video monitoring, infrared monitoring and other non-contact methods. Additionally real-time physiological monitoring with the Doppler radar system can also obtain signal changes caused by motion changes. As a result, the Doppler radar system not only obtains the information of respiratory and cardiac signals, but also obtains information about body movement. The relevant RF technology could eliminate some interference from body motion with a small amplitude. However, the motion recognition method can also be used to classify related body motion signals. In this paper, a vital sign and body movement monitoring system worked at 2.4 GHz was proposed. It can measure various physiological signs of the human body in a non-contact manner. The accuracy of the non-contact physiological signal monitoring system was analyzed. First, the working distance of the system was tested. Then, the algorithm of mining collective motion signal was classified, and the accuracy was 88%, which could be further improved in the system. In addition, the mean absolute error values of heart rate and respiratory rate were 0.8 beats/min and 3.5 beats/min, respectively, and the reliability of the system was verified by comparing the respiratory waveforms with the contact equipment at different distances.

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