Optom Vis Sci
*BOptom †BSc (Hons) ‡PhD Department of Optometry and Vision Sciences (JPP, RAO, SLH, AJA, BVB), The University of Melbourne; and Australian College of Optometry (SLH), Melbourne, Victoria, Australia; and Department of Optometry (SLH), City University, London, United Kingdom.
Published: October 2013
Purpose: To use a novel image analysis approach to consider how oxygen saturation changes as a function of vessel width and distance from the nerve and between superior and inferior retinal hemifields.
Methods: Ten images were acquired from one eye of 17 participants (mean [standard deviation] age, 28 [4] years; range, 22-38 years) using the Oxymap T1 retinal oximeter. Every pixel identified by the detection algorithm was extracted, and frequency histograms of retinal vessel oxygen saturation were plotted for each vessel diameter (70-170 μm). Histograms were fitted with two Gaussian models to identify peak arteriole and venule oxygen saturation. Mean (±standard error of the mean) arteriole and venule oxygen saturation at each vessel width were calculated. Data were also analyzed in (1) annuli of 100 μm centered on the optic nerve or (2) upper and lower hemifields demarcated by the center of the optic nerve.
Results: Venous oxygen saturation was higher in smaller vessels than in larger vessels. Arterial oxygen saturation remained relatively constant with vessel width. Oxygen saturation was lower in veins nearer the optic nerve. The upper retinal hemisphere showed higher venous oxygen saturation compared with the lower hemifield.
Conclusions: The current objective analysis approach provides a more complete picture of retinal oxygen saturation at the posterior pole as a function of vessel width and retinal location.
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http://dx.doi.org/10.1097/OPX.0000000000000028 | DOI Listing |
Sleep Breath
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Department of Pulmonary and Critical Care Medicine, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, No.1 Da Hua Road, Dong Dan, Dongcheng District, Beijing, 100730, PR China.
Purpose: To investigate the relationship between obstructive sleep apnea hypopnea syndrome (OSAHS) severity and fat, bone, and muscle indices.
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Int J Gynaecol Obstet
January 2025
Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China.
Pulmonary sequestration is a rare pulmonary malformation, typically characterized by asymptomatic presentation or recurrent pulmonary infections, with chest pain and hemothorax being exceedingly rare occurrences. The rupture and hemorrhage of maternal pulmonary sequestration during pregnancy pose a life-threatening condition that is challenging to diagnose. We present a case of a 37-year-old pregnant woman in her third trimester who presented with acute progressive hemothorax, a complication arising from maternal pulmonary sequestration.
View Article and Find Full Text PDFExpert Rev Respir Med
January 2025
Fondazione Istituto "G. Giglio" Cefalù, Cefalù, Italy.
Introduction: To evaluate the effectiveness of noninvasive positive pressure ventilation (NPPV) versus standard therapy in severe asthma exacerbations through meta-analysis.
Methods: Nine randomized controlled trials (344 patients) were analyzed from inception to August 2024. Primary outcomes included respiratory rate, forced expiratory volume in first second (FEV1), and oxygen saturation (SpO2).
BMC Ophthalmol
January 2025
College of Optometry, University of Houston College of Optometry, 4401 Martin Luther King Blvd, 77204-2020, Houston, TX, USA.
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J Oral Maxillofac Surg
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Professor, Private Practice, Proimtech A.Ş., Istanbul, Turkey.
Background: Postoperative nausea and vomiting (PONV) after orthognathic surgery remains one of the most common side effects despite the use of several medications.
Purpose: The study aimed to compare the frequencies of PONV between a combination of metoclopramide with granisetron and granisetron alone.
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