Vessel calibre and haemoglobin effects on pulse oximetry
نویسندگان
چکیده
منابع مشابه
Vessel calibre and haemoglobin effects on pulse oximetry.
Despite its success as a clinical monitoring tool, pulse oximetry may be improved with respect to the need for empirical calibration and the reports of biases in readings associated with peripheral vasoconstriction and haemoglobin concentration. To effect this improvement, this work aims to improve the understanding of the photoplethysmography signal-as used by pulse oximeters-and investigates ...
متن کاملNotes on the apparent discordance of pulse oximetry and multi-wavelength haemoglobin photometry.
Multi-wavelength photometers, blood gas analysers and pulse oximeters are widely used to measure various oxygen-related quantities. The definitions of these quantities are not always correct. This paper gives insight in the various definitions for oxygen quantities. Furthermore, the possible influences of dyshaemoglobins and fetal haemoglobin on the accuracy of pulse oximetry are discussed. As ...
متن کاملAccuracy of noninvasive haemoglobin measurement by pulse oximetry depends on the type of infusion fluid: Retraction.
CONTEXT Measurement of blood haemoglobin concentration by pulse oximetry could be of value in determining when erythrocytes should be transfused during surgery, but the effect of infusion fluids on the results is unclear. OBJECTIVE To study the effect of crystalloid and colloid fluid on the accuracy (bias) and precision of pulse oximetry haemoglobin estimation to indicate the venous haemoglob...
متن کاملAccuracy of noninvasive haemoglobin measurement by pulse oximetry depends on the type of infusion fluid
Context Measurement of blood haemoglobin (Hb) concentration by pulse oximetry (SpHb) could be of value to determine when erythrocytes should be transfused during surgery, but the effect of infusion fluids on the results is unclear. Objective To study the effect of crystalloid and colloid fluid on the accuracy (bias) and precision of SpHb to indicate the venous Hb concentration in volunteers. De...
متن کاملPulse Oximetry
The principal advantage of optical sensors for medical applications is their intrinsic safety since there is no electrical contact between the patient and the equipment. (An added bonus is that they are also less suspect to electromagnetic interference). This has given rise to a variety of optical techniques to monitor physiological parameters: for example, the technique of Laser Doppler veloci...
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ژورنال
عنوان ژورنال: Physiological Measurement
سال: 2009
ISSN: 0967-3334,1361-6579
DOI: 10.1088/0967-3334/30/9/001