Background: The 6-min walking distance (6MWD) test is a useful tool for assessing patients with chronic obstructive pulmonary disease (COPD), but little is known about the changes in oxygen saturation that occur during the test.
Objective: To predict the oximetry profile during daily living activities by the time to desaturation in the 6MWD test in COPD-affected patients.
Patients And Methods: We studied 67 COPD patients with moderate hypoxemia performing a 6MWD test and a 24-hour ambulatory pulse oximetry (24-hr PO). We determined the time to desaturation (SatO290%) in the 6MWD test, in the daytime, nighttime and 24-hr PO. We then estimated the time to desaturation that better predicts desaturation in diurnal, nocturnal and 24-hour oximetries using the ROC type II analysis.
Results: The patients who desaturated after 3'30min have a 100% probability not to desaturate during diurnal, nocturnal and 24-hr PO. Those patients who desaturated during the first minute of the 6MWD test have a 74% probability to desaturate in these oximetries.
Conclusions: The time to desaturation in the 6MWD test can discriminate early desaturators who desaturate during their daily living activities and late desaturators who do not desaturate. Ambulatory oximetry would thus only be necessary in patients with a time to desaturation that ranges between 1 and 3'30''.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.rmed.2008.02.004 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Association of Obstructive Sleep Apnea and Nocturnal Hypoxemia With the Circadian Rhythm of Myocardial Infarction.
J Am Heart Assoc
January 2025
Center for Coronary Artery Disease, Division of Cardiology Beijing Anzhen Hospital, Capital Medical University Beijing China.
Background: The circadian rhythm of myocardial infarction (MI) in patients with obstructive sleep apnea (OSA) remains disputable and no studies have directly evaluated the relationship between nocturnal hypoxemia and the circadian rhythm of MI. The aim of the current study was to evaluate the association of OSA and nocturnal hypoxemia with MI onset during the night.
Methods: Patients with MI in the OSA-acute coronary syndrome (ACS) project (NCT03362385) were recruited.
Effect of Study-Duration and Time of Day on Multichannel Sleep Study Findings in Former Preterm Infants.
Children (Basel)
January 2025
Connecticut Children's Medical Center-Hartford, 282 Washington Street, Hartford, CT 06106, USA.
Background/objectives: Determine the appropriate duration for multichannel sleep studies in former preterm infants with cardio-respiratory events beyond term equivalent age.
Hypothesis: A sleep study of 10 h will provide equivalent information compared to a 20-h study to detect significant cardio-respiratory abnormalities in this population.
Methods: Single-center retrospective study of 50 infants with 20-h sleep study.
High-flow nasal cannula for pre- and apneic oxygenation during rapid sequence induction intubation in emergency surgery: A systematic review and meta-analysis.
PLoS One
January 2025
Department of Anesthesiology, The Second Affiliated Hospital, The Army Military Medical University, Chongqing, China.
Background: Rapid sequence induction intubation (RSII) is commonly used in emergency surgeries for patients at high risk of aspiration. However, these patients are more susceptible to hypoxemia during the RSII process. High-flow nasal cannula (HFNC) oxygen therapy has emerged as a potential alternative to traditional face mask (FM) ventilation pre- and apneic oxygenation.
View Article and Find Full Text PDFDifferent expression of circulating microRNA profile in tibetan OSAHS with metabolic syndrome patients.
Sci Rep
January 2025
Department of Respiratory medicine, Taian 88 Hospital, Taian, 271000, People's Republic of China.
Recent empirical investigations reinforce the understanding of a profound interconnection between metabolic functions and Obstructive Sleep Apnea-hypopnea Syndrome (OSAHS). This study identifies distinctive miRNA signatures in OSAHS with Metabolic Syndrome (Mets) patients from healthy subjects, that could serve as diagnostic biomarkers or describe differential molecular mechanisms with potential therapeutic implications. In this study, OSAHS with MetS patients showed significantly higher Apnea Hyponea Index(AHI), but lower oxygen desaturation index(ODI 4/h) and minimum pulse oxygen saturation(SpO).
View Article and Find Full Text PDFThe effect of continuous positive airway pressure (CPAP) application on airway problems in pediatric patients with subglottic stenosis who undergo balloon dilatation.
Perioper Med (Lond)
January 2025
College of Medicine, QU Health, Qatar University, Doha, Qatar.
Background: Subglottic stenosis is a significant clinical challenge in pediatric anesthesia, often necessitating interventions that can lead to various postoperative complications. The aim of this study was to determine the effect of prophylactic continuous positive airway pressure (CPAP) application on recovery time and airway complications in pediatric patients with subglottic stenosis undergoing balloon dilatation.
Methods: A prospective, double-blinded, parallel-group, randomized controlled study was conducted at Health Sciences University Ümraniye Training and Research Hospital on pediatric patients with subglottic stenosis, aged from 0 to 12 years and who underwent elective balloon dilatation under general anesthesia.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!