The normal presentation of a patient with a drug induced methemoglobinemia is a low pulse oximetry (SpO2) reading, usually in the mid 80% range, while having a very high PaO2 on an arterial blood gas (ABG)1. We present a case where the initial ABG showed a very high PaO2 and a metabolic alkalosis while the SpO2 fluctuated (85% 99%). Those findings combined with hemodynamic instability complicat...

Purpose: To determine the usefulness of pulse oximetry in patients receiving iloprost infusion for treatment of critical limb ischemia unsuitable for revascularization. Material and methods: A total of 42 patients [28 male, mean age 61.80±5.81 years] were included. Patients were those who considered as unsuitable for revascularization based on angiographic study and received single-dose infusio...

OBJECTIVE To investigate implementation of outpatient pulse oximetry among children with pneumonia, in Malawi. METHODS In 2011, 72 health-care providers at 18 rural health centres and 38 community health workers received training in the use of pulse oximetry to measure haemoglobin oxygen saturations. Data collected, between 1 January 2012 and 30 June 2014 by the trained individuals, on childr...

BACKGROUND Overnight polysomnography is expensive and time consuming. An approach based on a logistic regression model and overnight pulse oximetry has been developed to determine which of the snorers referred to our sleep laboratory need polysomnography. METHODS The variables entered in the regression model were derived from questionnaires completed by 95 habitual snorers and 89 patients wit...

Assessment of oxyhemoglobin saturation in patients with sickle cell disease (SCD) is vital for prompt recognition of hypoxemia. The accuracy of pulse oximeter measurements of blood oxygenation in SCD patients is variable, partially due to carboxyhemoglobin (COHb) and methemoglobin (MetHb), which decrease the oxygen content of blood. This study evaluated the accuracy and reliability of a non-inv...

INTRODUCTION This study investigates the relation between changes in pulse oximeter oxygen saturation (SpO2) and changes in arterial oxygen saturation (SaO2) in the critically ill, and the effects of acidosis and anaemia on precision of using pulse oximetry to predict SaO2. PATIENTS AND METHODS Forty-one consecutive patients were recruited from a nine-bed general intensive care unit into a 2-...

Acute respiratory insufficiency may occur through failure of any component of the respiratory apparatus from the brain to the lungs. Causes include acute exacerbation of an underlying disease, such as asthma or chronic obstructive airways disease; interference with the mechanical action of the lungs and chest-for example, trauma or pneumothorax; interference with the neuromuscular function-for ...

BACKGROUND Change in cardiac preload caused by mild hypovolemia can alter left ventricular ejection time (LVET) without noticeable change in blood pressure (BP). Previously our group has explored a novel method of LVET monitoring using a noninvasive finger photoplethysmographic pulse oximetry wave form. The current study investigated the ability of photoplethysmographic pulse oximetry wave form...