The dual-wavelength diffuse correlation spectroscopy (DCS) flow-oximeter is an emerging technique enabling simultaneous measurements of blood flow and blood oxygenation changes in deep tissues. High signal-to-noise ratio (SNR) is crucial when applying DCS technologies in the study of human tissues where the detected signals are usually very weak. In this study, single-mode, few-mode, and multim...

Microcirculatory dysfunction is very common in sepsis and may results in organ failure and increased risk of death. Analyzing oxygen utilization can potentially assess microcirculation function of an individual. In this study, a modified pulse oximeter is used to extract information signals due to absorption of red (R) and infrared (IR) light. IR and R signal are related to the overall blood vo...

Abstract To assess possible SpO2 accuracy differences between 3 different (oximeter & software) testing techniques. Hypothesised that in would be within the oximeter manufacturer’s specification. A synthetic digit, OX-1 OxSim® Optical Pulse Oximeter Simulator (Pronk Technologies Inc., Sun Valley, CA) can provide simulated HR values : 85% (80BPM), 98% (140BPM), 99% (80BPM) at low perfusion a...

Group Members: Fanpeng Kong, Yubo Qin, Zhengyu Yang and Zhongtian Lin Advisor: Prof. Laleh Najafizadeh Introduction The aim of this project is to design a wearable pulse oximeter which is capable of measuring the heart-rate and blood’s oxygen saturation. The project employs wearable electronics. The project consists of three main parts: 1) sensor design, which includes the optical transceiver u...

AANA Journal April 2009 Vol. 77, No. 2 137 Patients having surgical procedures are at risk for anoxia that may cause cognitive impairment. Continuous monitoring of cerebral oxygenation and perfusion with an instrument such as a cerebral oximeter is desirable.The data it provides give insight into the cause of the cerebral insults along with the cerebral response to specific interventions, all o...

The measurement of tissue oxygen saturation with a pulse oximeter is of proved value in the hospital setting. The development of a portable oximeter has allowed this investigation to be performed during the prehospital phase of a patient's care. Pulse oximetry was performed at the roadside in 25 patients with abnormal trauma scores and found to be of benefit in detecting and monitoring hypoxia ...

Pulse oximetry is a non-invasive method for monitoring a person's O2 saturation. In its most common (transmissive) application mode, a sensor device is placed on a thin part of the patient's body, usually a fingertip orearlobe, or in the case of an infant, across a foot. The device passes two wavelengths of light through the body part to a photodetector. It measures the changing absorbance at e...

The objective of this work was to develop a prototype for a pulse oximeter. Given the necessity, in most medical interventions, to monitorize Oxygen saturation in peripheral blood (SpO2) a pulse oximeter is highly necessary in any operating room or intensive care unit. The electronic device was built recurring mostly to Integrated Circuit (IC) and its control was performed via a programmed micr...

The aim of the present study was to evaluate the accuracy, in comparison with a reference method, of the Nellcor N-20P pulse oximeter in the assessment of oxyhaemoglobin saturation (Sa,O2). Sa,O2 was monitored at rest by the Nellcor N-20P pulse oximeter in 100 subjects (82 males, mean age 68+/-12 yrs) consecutively enroled. At the same time, an arterial blood sample was collected for the measur...