D.G. Guo

National University of Singapore, Singapore, Singapore

Are you D.G. Guo?

Claim your profile

Publications (9)0 Total impact

  • [Show abstract] [Hide abstract]
    ABSTRACT: This paper proposes a remote vital signs monitoring system, which integrates wireless body area network (WBAN) and personal digital assistant (PDA) phone technology. Four different physiological signs, e.g., ECG, SpO2, temperature and blood pressure, can be continuously acquired or derived from two wireless sensor nodes—ECG sensor and integrated SpO2/temperature sensor. Once sentinel events happened or the request to real-time display vital signs is confirmed, all physiological signs and critical indices will be immediately transmitted to patient's PDA phone through Bluetooth and further relayed to doctor's PDA phone through global system for mobile communication (GSM) technology. A prototype of such system has been successfully developed and implemented, which will offer high standard of healthcare with a major reduction in cost for our society.
    Journal of the Franklin Institute. 01/2009;
  • [Show abstract] [Hide abstract]
    ABSTRACT: This paper proposes a novel micromachined physiological recording electrode with hollow microneedles for electrocardiography (ECG) measurement. Compared to the standard commercial wet electrode, a unique characteristic of this device is that a hollow microneedle array, which is made of silicon, can pierce through the outer skin surface, lowering the electrode-skin-electrode impedance (ESEI) and eliminating the need for skin preparation. Furthermore, instead of the conventional electrolytic gel, NaCl solution is used to fill the hollow microneedles and the reservoir etched in the backside of the silicon die; it is more comfortable, easy to acquire and imposes no side-effects on human. Test results of this electrode showed that this device could acquire typical structures of ECG signal with high signal to noise ratio, which provides a potential for routine and repetitive measurement with convenience, and comfort for home health care management of aged population.
    Sensors and Actuators A: Physical. 01/2009;
  • [Show abstract] [Hide abstract]
    ABSTRACT: A novel micromachined electrode is designed and fabricated for a BSN-based vital signs monitoring system. Both theoretical calculation and ANSYS simulation show that buckling problem will not occur for the proposed microneedles during insertion process. The BSN-based vital signs routine monitoring system, which comprises of wireless mote, analog amplifier circuit board and SpO2 (Saturation of Arterial Oxygen) probe, is able to measure physiological signs in real time and with minimum disturbance on quality of life. The proposed device is easy to wear and convenient to use. Using a dock with ZigBee adapter, a PDA phone can communicate with the mote and then display the ECG/PPG waveforms as well as the important indices of vital signs, such as heart beat rate, SpO2 value and systolic blood pressure.
    Sixth International Workshop on Wearable and Implantable Body Sensor Networks, BSN 2009, Berkeley, CA, USA, 3-5 June 2009; 01/2009
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: This paper proposes a novel micromachined physiological recording electrode with hollow microneedles for Electrocardiography (ECG) measurement. Compared to the standard commercial wet electrode and other proposed dry electrodes, a unique characteristic of this device is that a hollow microneedle array is made of silicon, which can pierce through the outer skin surface, lowering the electrode-skin-electrode impedance (ESEI) thus eliminating the need for skin preparation. Furthermore, instead of the conventional electrolytic gel, NaCl solution is used to fill the hollow microneedles and the reservoir etched in the backside of the silicon die; it is more comfortable, easy to acquire and imposes no side-effects on human. Test results of this electrode agreed well with the signal from commercial wet electrodes. This device provides a great potential for ECG measurement with cost-effective, convenience, and comfortability for health care management of aged population.
    Sensors, 2008 IEEE; 11/2008
  • [Show abstract] [Hide abstract]
    ABSTRACT: A wearable BSN-based ECG-recording system is proposed for long-term and continuous arrhythmia monitoring. A novel micromachined Pt electrode is specifically designed, fabricated and integrated into a wearable chest band. A miniaturized PCB for ECG analog front-end is fabricated, and can be plugged on the BSN node to wirelessly transmit the signal to a hand-held device. Wavelet denoising is implemented on the hand-held device to further reduce the noise induced by electrode contact. Once a beat is detected, it is characterized by a number of features such as width, amplitude and rhythm pattern, and different types of arrhythmias can then be real-time classified. Once sentinel events such as arrhythmia is detected, the abnormal ECG signal can be sent wirelessly by hand-held device through GPRS to doctors or caregivers for prompt analysis and further treatment.
    Medical Devices and Biosensors, 2008. ISSS-MDBS 2008. 5th International Summer School and Symposium on; 07/2008
  • [Show abstract] [Hide abstract]
    ABSTRACT: Wearable medical devices provide great convenience to the elderly for the monitoring of vital signs at home. This paper describes a novel long-term wearable vital signs monitoring system which can real-time measure physiological signs such as ECG, SpO2 (Saturation of Arterial Oxygen) and systolic blood pressure. The proposed device is easy to wear, convenient to use and has almost no impact on the quality of life. A miniaturized PCB integrated with the ECG analog front-end and SpO2 LED drive circuit is attached onto the BSN node. By simply wearing the chest band embedded with ECG micromachined electrodes and the ear-probe which incorporates LEDs and photodetector, the measured physiological signals can be wirelessly transmitted to a hand-held device, such as PDA phone, where the heart beat rate, SpO2 and systolic blood pressure are calculated and displayed.
    11th Euromicro Conference on Digital System Design: Architectures, Methods and Tools, DSD 2008, Parma, Italy, September 3-5, 2008; 01/2008
  • [Show abstract] [Hide abstract]
    ABSTRACT: Wearable medical devices provide great convenience to the elderly for the monitoring of vital signs at home. This paper describes a novel wrist-worn vital signs routine monitoring system which can measure physiological signs including ECG, SpO2 (Saturation of Arterial Oxygen) and systolic blood pressure in real-time and with almost no impact on quality of life. The proposed device is easy to wear and convenient to use. A miniaturized PCB integrates the ECG analog front-end and SpO2 LED drive circuit and can be attached on a BSN node. By simply press the top ECG electrode on the device using any finger from the other hand, the measured physiological signals will be wirelessly transmitted to a PDA, where the heart beat rate, SpO2 and systolic blood pressure is calculated and displayed on a hand-held device, such as PDA.
    01/2008;
  • [Show abstract] [Hide abstract]
    ABSTRACT: A system based on Body Area Network for detecting the onset of faint fall using motion sensors is presented. It is a portion of the project for elderly fall safety in which abnormal ECG and blood pressure vital signs are used to predict the imminent faint and fall onset is subsequently detected in activating the feedback systems. A statement of hypothesis, proof and experimental results are thoroughly discussed and presented.
    01/2007;
  • [Show abstract] [Hide abstract]
    ABSTRACT: MEMSWear is an initiative that takes advantage of MEMS technology and applies it in developing a wearable platform for monitoring of vital signs and other important events such as falls in the elderly. BAN facilitated MEMSWear transmits data wirelessly to designated users, such as doctors, caregivers or family members through Bluetooth-enabled PDAs/phones belong to wearers. The system offers high standard of health care at a major reduction in cost that our society needs
    International Semiconductor Conference, 2006; 10/2006