Pulse Oximeter Analysis

914 Words4 Pages

Once a patient starts losing oxygen, a doctor has not more than three minutes to prevent risk of heart failure, brain damage, and death. It is important to monitor the blood volume in the microvascular bed of tissue continuously. A non-invasive medical device means to monitor arterial oxygen saturation (SaO2) on a continuous basis is pulse oximetry is typically used. Pulse oximetry is a well-established technology based on photoplethysmography (PPG) that has become one of the most commonly used patient monitors during anesthesia and in intensive care units. Anesthesia can be defined as ‘loss of sensation’. It refers to the practice of the medications either by injection or by inhalation that block the pain feeling and other sensations, or the …show more content…

The heart rate and respiratory rate can be measured by using a few medical devices that exist in the market. One of them is capnograph. Capnograph is an expensive device that requires a significant amount of maintenance as it also requires a mask or nasal cannula, and is therefore a discomfort to the patient and is hard to use. Therefore, pulse oximeter can be said as the most appealing from both economic and patient comfort perspectives.The procedure of collecting data using pulse oximeter is kind of simple. The subject can be in upright or supine positions, then the sensor will be attached to the either subject’s finger, ear or toe.PPG signal can then be obtained the pulse oximeter. The change in volume of blood will be detected by illuminating the skin with the light from a light-emitting diode (LED) and then measuring the amount of light either transmitted or reflected to a photodiode. Each cardiac cycle will appear as a peak. The shape of the PPG waveform are different from one subject to another subject, and varies with the location and manner in which the pulse oximeter is attached. Many recent efforts using advanced signal processing algorithms to get the heart rate and respiratory rate. Variable frequency complex demodulation (VFCDM), wavelet decomposition, and auto-regression are some of the algorithms that have been used in analyzing PPG signal in order to calculate the respiratory …show more content…

The technique is called “Statistical Analysis of PPG signal in measuring the heart rate and respiratory rate”. This method of analyzing overcomes the disagreement in VFCDM since it takes multiparameters in calculating the respiratory rate and heart rate. The technique proposed can be applied to the anesthetic patients and also normal person.

Objective of this project : The aim of this study is to analyse the photoplethysmogram signal from anesthetic patient and normal person by using Statistical Analysis technique. The second objective is to determine the heart rate and respiratory rate using the three parameters extracted from the PPG signal which are Respiratory Induced Frequency Variation (RIFV), Respiratory Induced Intensity Variation (RIIV), and Respiratory Induced Amplitude Variation (RIAV).

Scope of study

More about Pulse Oximeter Analysis

Open Document