aortic dissection begins with the formation of a tear in the aortic intima, and it directly exposes an underlying diseased medial layer to the driving force of the intraluminal blood. this blood penetrates the diseased medial layer and cleaves the media longitudinally, thereby dissecting the aortic wall. herein, we report the case of a 38-year-old woman, who presented with chest pain and dyspne...

STUDY OBJECTIVE This study was undertaken in a group of patients with periodic limb movement disorder (PLMD) to assess whether the presence of increased pulse rate variability (PRV) without desaturation on overnight oximetry was suggestive of the occurrence of periodic limb movements (PLMs). METHODS Seventy sleepy patients with a polysomnographic diagnosis of PLMD and 25 controls with obstruc...

Purpose Biomarkers for several eye and brain diseases are reviewed, where retinal oximetry may help confirm diagnosis or measure severity of disease. These include diabetic retinopathy, central retinal vein occlusion (CRVO), retinitis pigmentosa, glaucoma, and Alzheimer's disease. Methods Retinal oximetry is based on spectrophotometric fundus imaging and measures oxygen saturation in retinal ...

INTRODUCTION Obstructive sleep apnea syndrome (OSAS) is the most serious consequence of adenotonsillar hypertrophy (ATH). The gold standard diagnostic method is polysomnography (PSG) with nocturnal oximetry, but it requires expensive equipment, the presence of a technician and a specialized doctor, and is very time consuming, making the procedure difficult. The recording of pulse oximetry monit...

BACKGROUND Sleep-disordered breathing is a common and serious feature of many paediatric conditions and is particularly a problem in children with Down syndrome. Overnight pulse oximetry is recommended as an initial screening test, but it is unclear how overnight oximetry results should be interpreted and how many nights should be recorded. METHODS This retrospective observational study evalu...

In Duchenne muscular dystrophy (DMD) nocturnal oxygen desaturation occurs during rapid eye movement (REM) sleep. Polysomnography, which requires hospital admission, will detect sleep-related breathing abnormalities. In order to avoid the inconvenience of hospital admission for the disabled patient, we investigated overnight oxygenation in ten boys with DMD by domiciliary oximetry. In four boys ...

measurements under these conditions, Jobes and Nicolson ~ modified an oximetry probe for attachment to the tongue. Gunter 2 found this technique difficult to use since the modified probe kept slipping off. He adapted a peripheral oximetry probe with a metal strip and placed it across the patient's cheek and noted improved reliability of these "buccal" measurements compared with peripheral ones....

INTRODUCTION AND OBJECTIVES Oxygen saturation by pulse oximetry is commonly used for monitoring critical patients, but its utility as a diagnostic marker of acute heart failure has not been assessed. This study analyzed the diagnostic role of oxygen saturation by pulse oximetry in a series of patients with acute myocardial infarction. METHODS In a prospective observational cohort study of 220...

OBJECTIVES We sought to determine the prevalence of nocturnal oxygen desaturation and obstructive sleep apnea (OSA) in a population of patients with hypertrophic cardiomyopathy (HCM). BACKGROUND The coexistence of sleep apnea and HCM, 2 common cardiovascular conditions, has been largely unrecognized in the treatment of patients with HCM. The nocturnal hypoxia-induced hyperadrenergic state in ...

OBJECTIVE: The purposes of the study were to: (1) describe the aggregate strength of the relationship of arterial oxygen saturat ion as measured by pulse oximetry with the standard of arterial blood gas analysis as measured by co-oximetry, (2) examine how various factors affect this relationship, and (3) describe an aggregate estimate of the bias and precision be tween oxygen saturation as meas...