منابع مشابه
Bias and precision of pulse oximeters and arterial oximeters.
We evaluated measurements of oxygen saturation from four noninvasive pulse oximeters, and two conventional arterial oximeters. Simultaneous measurements were obtained on each instrument on three different occasions in five healthy subjects breathing gas with an FIO2 of 1.00, 0.50, 0.21, 0.17, 0.15, 0.13 and 0.11. Mean bias relative to the sum of oxy-, carboxy-, and methemoglobins ranged from -0...
متن کاملAccuracy and precision of fourteen pulse oximeters.
Two sets of seven pulse oximeters (Criticare CSI-502; Nellcor-N200; Datex-Satlite; Physio-Control-Lifestat 1600; Critikon-Oxyshuttle; Ohmeda-Biox 3700; Ohmeda-Biox 3740; Radiometer-Oxi; Spectramed-Pulsat; Kontron-7840; Biochem-Ox2000; Invivo-4500; Engström-EOS; Novametrix-505) were studied in two groups of eight healthy subjects, aged 26-50 yrs. The transcutaneous oxygen saturation (SpO2) was c...
متن کاملThe desaturation response time of finger pulse oximeters during mild hypothermia.
Pulse oximeters may delay displaying the correct oxygen saturation during the onset of hypoxia. We investigated the desaturation response times of pulse oximeter sensors (forehead, ear and finger) during vasoconstriction due to mild hypothermia and vasodilation caused by glyceryl trinitrate. Ten healthy male volunteers were given three hypoxic challenges of 3 min duration under differing experi...
متن کاملAn Introduction to Pulse Oximeters: Equations and Theory
Pulse oximeters are electrical devices used for measuring blood oxygen saturation and pulse rate. Since their conception they have gained widespread acceptance in the medical community. This paper primarily focuses on the theory behind pulse oximetry. Beginning with the Beer-Lambert s Law, which relates the intensity of light before and after an absorbing medium, manipulations are made so that ...
متن کاملFungus Infection of the Finger-Nails
In his handbook of Diseases of the Skin (1907), Whitfield states that fungus infections of the nails are probably commoner than is generally supposed. That statement is borne out by the fact that Within the last three years I have had the opportunity of observing no fewer than 19 cases ; 17 of these were seen as out-patients in the Skin Department of the Royal Infirmary under Dr Norman Walker's...
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ژورنال
عنوان ژورنال: Anaesthesia
سال: 1989
ISSN: 0003-2409,1365-2044
DOI: 10.1111/j.1365-2044.1989.tb11270.x