PMID: 8594966Dec 1, 1995Paper

The use of pulse oximetry in prilocaine induced methemoglobinemia

Der Anaesthesist
B RudlofL Brandt

Abstract

During the last 15 years pulse oximetry has become a widely accepted method of monitoring during general and local anaesthesia. Pulse oximeters measuring with two wave-lengths are considerably affected by dyshaemoglobin. At concentrations up to 30%, CO-Hb cannot be distinguished from O2-Hb. Met-Hb, even in low concentrations, leads to a constant error of measurement; some authors recommended exploiting this for estimation of the Met-Hb concentration. To prove the aim of the present study was to test whether this error in measurement can be defined with one formula for different pulse oximeters. PATIENTS AND METHODS. In a prospective, randomized, double-blind study, 171 non-smoking patients with healthy lungs (ASA 1-3) who had received a plexus block for hand surgery were investigated. After premedication with 3.75-15 mg medazolam p.o. each patient received a total of 6 1O2 via a Hudson mask during the investigation. After 10 min the following pulse oximeters were put on the index finger: (1) Ohmeda BIOX 3700e, (2) Critikon Oxyshuttle, (3) Nellcor N 180. Simultaneously a venous blood sample was taken and analysed immediately with a Radiometer OSM3. The procedure was repeated 15, 30, 60 and 120 min after the plexus block. In 41 p...Continue Reading

Citations

Feb 26, 2010·Journal of Medical Case Reports·Hatice OzdoganGulten Ozgun
Jul 5, 2005·European Journal of Anaesthesiology·L HueterW Karzai
Oct 30, 2001·Anesthesia and Analgesia·A KujiS Joh
May 26, 2006·European Journal of Anaesthesiology·F G VastersA M Morin

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