scholarly journals Prediction of optimal continuous positive airway pressure in Thai patients with obstructive sleep apnea

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Narongkorn Saiphoklang ◽  
Kanyada Leelasittikul ◽  
Apiwat Pugongchai
Keyword(s):  
Obstructive Sleep Apnea ◽  
Sleep Apnea ◽  
Continuous Positive Airway Pressure ◽  
Airway Pressure ◽  
Positive Airway Pressure ◽  
Linear Regression Analysis ◽  
Prediction Equation ◽  
Apnea Hypopnea Index ◽  
Predictive Equation ◽  
Obstructive Sleep

AbstractContinuous positive airway pressure (CPAP) is simple and effective treatment for obstructive sleep apnea (OSA) patients. However, the CPAP prediction equation in each country is different. This study aimed to predict CPAP in Thai patients with OSA. A retrospective study was conducted in Thai patients, who OSA was confirmed by polysomnography and CPAP titration from January 2015 to December 2018. Demographics, body mass index (BMI), neck circumference (NC), Epworth sleepiness scale, apnea–hypopnea index (AHI), respiratory disturbance index (RDI), mean and lowest pulse oxygen saturation (SpO2), and optimal pressure were recorded. A total of 180 subjects were included: 72.8% men, age 48.7 ± 12.7 years, BMI 31.0 ± 6.3 kg/m2, NC 40.7 ± 4.1 cm, AHI 42.5 ± 33.0 per hour, RDI 47.1 ± 32.8 per hour, and lowest SpO2 77.1 ± 11.0%. Multiple linear regression analysis identified NC, BMI, RDI, and lowest SpO2. A final CPAP predictive equation was: optimal CPAP (cmH2O) = 4.614 + (0.173 × NC) + (0.067 × BMI) + (0.030 × RDI) − (0.076 × lowest SpO2). This model accounted for 50.0% of the variance in the optimal pressure (R2 = 0.50). In conclusion, a CPAP prediction equation can be used to explain a moderate proportion of the titrated CPAP in Thai patients with OSA. However, the CPAP predictive equation in each country may be different due to differences of ethnicity and physiology.Trial registration: TCTR20200108003.

scholarly journals Effect of continuous positive airway pressure treatment of obstructive sleep apnea-hypopnea in multiple sclerosis: A randomized, double-blind, placebo-controlled trial (SAMS-PAP study)

2021 ◽  
pp. 135245852110103
Author(s):  
Sulaiman Khadadah ◽  
R John Kimoff ◽  
Pierre Duquette ◽  
Vincent Jobin ◽  
Yves Lapierre ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Obstructive Sleep Apnea ◽  
Sleep Apnea ◽  
Continuous Positive Airway Pressure ◽  
Airway Pressure ◽  
Primary Outcome ◽  
Positive Airway Pressure ◽  
Apnea Hypopnea Index ◽  
Double Blind ◽  
Obstructive Sleep

Objective: The aim of this study was to evaluate the effect of continuous positive airway pressure (CPAP) treatment on the Fatigue Severity Scale (FSS, preplanned primary outcome), another fatigue measure, sleep quality, somnolence, pain, disability, and quality of life in multiple sclerosis (MS) patients with obstructive sleep apnea-hypopnea (OSAH). Methods: In a randomized, double-blind trial (NCT01746342), MS patients with fatigue, poor subjective sleep quality, and OSAH (apnea-hypopnea index of ⩾ 15 events per hour/sleep), but without severe OSAH (apnea-hypopnea index > 30, and 4% oxygen desaturation index > 15 events/hour or severe somnolence), were randomized to fixed CPAP or sham CPAP for 6 months. Outcome assessments were performed at 3 and 6 months. Results: Of 49 randomized patients, 34 completed the protocol. Among completers, FSS did not improve with CPAP compared to sham at 6 months. FSS tended to improve ( p = 0.09), and sleepiness (Epworth Sleepiness Scale) improved significantly ( p = 0.03) at 3 months with CPAP compared to sham, but there were no other improvements with CPAP at either study evaluation. Conclusion: In non-severe OSAH patients, CPAP did not significantly improve the primary outcome of FSS change at 6 months. In secondary analyses, we found a trend to improved FSS, and a significant reduction in somnolence with CPAP at 3 months.

scholarly journals Long-Term Compliance with Continuous Positive Airway Pressure in Patients with Obstructive Sleep Apnea

2008 ◽  
Vol 15 (7) ◽  
pp. 365-369 ◽  
Author(s):  
Norman Wolkove ◽  
Marc Baltzan ◽  
Hany Kamel ◽  
Richard Dabrusin ◽  
Mark Palayew
Keyword(s):  
Obstructive Sleep Apnea ◽  
Sleep Apnea ◽  
Continuous Positive Airway Pressure ◽  
Airway Pressure ◽  
Positive Airway Pressure ◽  
Significant Proportion ◽  
Apnea Hypopnea Index ◽  
Cpap Titration ◽  
Obstructive Sleep

BACKGROUND: Continuous positive airway pressure (CPAP) is an effective treatment for obstructive sleep apnea (OSA). However, compliance is a significant problem and has been incompletely assessed in long-term studies.OBJECTIVE: To assess the long-term compliance of OSA patients with CPAP therapy.SUBJECTS: Eighty patients who had had a diagnosis of OSA at least four years previously and received a written prescription for CPAP were evaluated.METHODS: Subjects were identified by reviewing sleep laboratory records. Participants were contacted by telephone and were asked to quantitate their CPAP use (hours per night, nights per week) and to evaluate whether there had been improvement in symptoms. Those who commenced but subsequently abandoned therapy and those who never initiated treatment were questioned about their reasons for noncompliance.RESULTS: Patient demographics included mean (± SD) age (58±11 years), male sex (70 of 80 patients [88%]) and mean apnea-hypopnea index (70±44 events/h). At the time of the interview (64.0±3.7 months after diagnosis), 43 of 80 patients (54%) were still using CPAP and most reported an improvement in symptoms. Twelve of 80 patients (15%) had abandoned CPAP after using it for 10.1±15.5 months, and 25 of 80 patients (31%) had never commenced therapy after initial diagnosis and CPAP titration. Analysis of scores reflecting initial patient sleepiness revealed a significant association of this symptom with subsequent CPAP compliance.CONCLUSION: Although many patients with OSA derive subjective benefit from, and adhere to treatment with CPAP, a significant proportion of those so diagnosed either do not initiate or eventually abandon therapy. Initial experience with CPAP appears to be important, reinforcing the need for early education and support in these patients.

scholarly journals Continuous positive airway pressure in patients with rapid eye movement (REM)-specific obstructive sleep apnea, a retrospective match-controlled chart review

F1000Research ◽  
2019 ◽  
Vol 7 ◽  
pp. 1848
Author(s):  
Rodolfo Soca ◽  
Erica Buchner ◽  
Hrayr Attarian
Keyword(s):  
Obstructive Sleep Apnea ◽  
Sleep Apnea ◽  
Continuous Positive Airway Pressure ◽  
Eye Movement ◽  
Airway Pressure ◽  
Positive Airway Pressure ◽  
Apnea Hypopnea Index ◽  
Rapid Eye Movement ◽  
Retrospective Case ◽  
Obstructive Sleep

Background: Rapid eye movement (REM) obstructive sleep apnea (OSA) represents 13 to 35% of all OSA cases and is more common in women. Continuous positive airway pressure (CPAP) is the gold standard for treatment of all forms of OSA but we do not know if patients with REM OSA have different pressure requirements than those with non-stage dependent OSA. Methods: This was a retrospective case control study. We first identified individuals with REM OSA and then tried to identify apnea hypopnea index (AHI), gender, and body mass index (BMI) matching controls that had non-stage specific OSA. Individuals were considered to have REM OSA if the REM AHI was greater than 5 events/hour, and the ratio of REM AHI / non-rapid eye movement (NREM) AHI was greater than 2. Demographic variables and the recommended CPAP pressure were analyzed using paired Student’s T-Tests. Results: Our study included a total of 16 individuals with REM OSA and equal number of AHI, gender, and BMI matching controls. Both groups had similar demographic and polysomnographic characteristics.  Individuals with REM OSA required similar CPAP pressures as controls (7.5 cm H 2O vs 7.4 cm H 2O p=0.78). Conclusion: Individuals with REM might require similar CPAP pressures as their AHI, gender, and BMI matching controls.

Continuous positive airway pressure and adverse cardiovascular events in obstructive sleep apnea: Are participants of randomized trials representative of sleep clinic patients?

SLEEP ◽  
2021 ◽  
Author(s):  
Ayesha Reynor ◽  
Nigel McArdle ◽  
Bindiya Shenoy ◽  
Satvinder S Dhaliwal ◽  
Siobhan C Rea ◽  
...  
Keyword(s):  
Obstructive Sleep Apnea ◽  
Sleep Apnea ◽  
Continuous Positive Airway Pressure ◽  
Airway Pressure ◽  
Positive Airway Pressure ◽  
Randomized Study ◽  
Apnea Hypopnea Index ◽  
Eligibility Criteria ◽  
Obstructive Sleep ◽  
Cv Disease

Abstract Study Objectives Randomized controlled trials (RCTs) have shown no reduction in adverse cardiovascular (CV) events in patients randomized to continuous positive airway pressure (CPAP) therapy for obstructive sleep apnea (OSA). This study examined whether randomized study populations were representative of OSA patients attending a sleep clinic. Methods Sleep clinic patients were 3,965 consecutive adults diagnosed with OSA by in-laboratory polysomnography from 2006-2010 at a tertiary hospital sleep clinic. Characteristics of these patients were compared with participants of 5 recent RCTs examining the effect of CPAP on adverse CV events in OSA. The percentage of patients with severe (apnea hypopnea index, [AHI]≥30 events/hour) or any OSA (AHI≥5 events/hour) who met the eligibility criteria of each RCT was determined, and those criteria that excluded the most patients identified. Results Compared to RCT participants, sleep clinic OSA patients were younger, sleepier, more likely to be female and less likely to have established CV disease. The percentage of patients with severe or any OSA who met the RCT eligibility criteria ranged from 1.2% to 20.9% and 0.8% to 21.9%, respectively. The eligibility criteria that excluded most patients were pre-existing CV disease, symptoms of excessive sleepiness, nocturnal hypoxemia and co-morbidities. Conclusions A minority of sleep clinic patients diagnosed with OSA meet the eligibility criteria of RCTs of CPAP on adverse CV events in OSA. OSA populations in these RCTs differ considerably from typical sleep clinic OSA patients. This suggests that the findings of such OSA treatment-related RCTs are not generalisable to sleep clinic OSA patients.

scholarly journals Obstructive sleep apnea and effects of continuous positive airway pressure on triglyceride-rich lipoprotein metabolism

2018 ◽  
Vol 59 (6) ◽  
pp. 1027-1033 ◽  
Author(s):  
Luciano F. Drager ◽  
Thauany M. Tavoni ◽  
Vanessa M. Silva ◽  
Raul D. Santos ◽  
Rodrigo P. Pedrosa ◽  
...  
Keyword(s):  
Obstructive Sleep Apnea ◽  
Sleep Apnea ◽  
Continuous Positive Airway Pressure ◽  
Cholesteryl Ester ◽  
Airway Pressure ◽  
Positive Airway Pressure ◽  
Lipoprotein Metabolism ◽  
Apnea Hypopnea Index ◽  
Sample Collection ◽  
Obstructive Sleep

This study aimed to explore lipoprotein metabolism in obstructive sleep apnea (OSA) and the effects of continuous positive airway pressure (CPAP). We studied 15 men with severe OSA [apnea-hypopnea index (AHI) ≥30 events/hour] and 12 age-, BMI-, and waist circumference-matched volunteers without OSA (AHI <5 events/hour). Carotid intima-media thickness (CIMT) was determined by a blind examiner. After 12 h fasting, a triglyceride-rich chylomicron-like emulsion, labeled with [14C]cholesteryl oleate and [3H]triolein, was injected intravenously followed by blood sample collection at preestablished times. Fractional clearance rate (FCR) of the radiolabeled lipids was estimated by compartmental analysis of radioisotope decay curves. Compared with controls, patients with OSA showed a significant delay in both cholesteryl ester FCR (0.0126 ± 0.0187 vs. 0.0015 ± 0.0025 min−1; P = 0.0313) and triglycerides FCR (0.0334 ± 0.0390 vs. 0.0051 ± 0.0074 min−1; P = 0.0001). CIMT was higher in the OSA group: 620 ± 17 vs. 725 ± 29 µm; P = 0.004. Cholesteryl ester FCRs were inversely related to total sleep time <90% (r = −0.463; P = 0.029) and CIMT (r = −0.601; P = 0.022). The triglyceride FCR was inversely correlated with AHI (r = −0.537; P = 0.04). In a subgroup of patients treated with CPAP for 3 months (n = 7), triglyceride FCR increased 5-fold (P = 0.025), but the cholesteryl ester FCR was unchanged. In conclusion, severe OSA decreased lipolysis of triglyceride-rich lipoproteins and delayed removal of remnants. CPAP treatment may be effective to restore the lipolysis rates.

scholarly journals Perioperative Auto-titrated Continuous Positive Airway Pressure Treatment in Surgical Patients with Obstructive Sleep Apnea

2013 ◽  
Vol 119 (4) ◽  
pp. 837-847 ◽  
Author(s):  
Pu Liao ◽  
Quanwei Luo ◽  
Hisham Elsaid ◽  
Weimin Kang ◽  
Colin M. Shapiro ◽  
...  
Keyword(s):  
Obstructive Sleep Apnea ◽  
Sleep Apnea ◽  
Continuous Positive Airway Pressure ◽  
Airway Pressure ◽  
Positive Airway Pressure ◽  
Compliance Rate ◽  
Control Group ◽  
Apnea Hypopnea Index ◽  
Obstructive Sleep ◽  
And Control

Abstract Background: Obstructive sleep apnea (OSA) may worsen postoperatively. The objective of this randomized open-label trial is to determine whether perioperative auto-titrated continuous positive airway pressure (APAP) treatment decreases postoperative apnea hypopnea index (AHI) and improves oxygenation in patients with moderate and severe OSA. Methods: The consented patients with AHI of more than 15 events/h on preoperative polysomnography were randomized into the APAP or control group (receiving routine care). The APAP patients received APAP for 2 or 3 preoperative, and 5 postoperative nights. All patients were monitored with oximetry for 7 to 8 nights (N) and underwent polysomnography on postoperative N3. The primary outcome was AHI on the postoperative N3. Results: One hundred seventy-seven OSA patients undergoing orthopedic and other surgeries were enrolled (APAP: 87 and control: 90). There was no difference between the two groups in baseline data. One hundred six patients (APAP: 40 and control: 66) did polysomnography on postoperative N3, and 100 patients (APAP: 39 and control: 61) completed the study. The compliance rate of APAP was 45%. The APAP usage was 2.4–4.6 h/night. In the APAP group, AHI decreased from preoperative baseline: 30.1 (22.1, 42.5) events/h (median [25th, 75th percentile]) to 3.0 (1.0, 12.5) events/h on postoperative N3 (P &lt; 0.001), whereas, in the control group, AHI increased from 30.4 (23.2, 41.9) events/h to 31.9 (13.5, 50.2) events/h, P = 0.302. No significant change occurred in the central apnea index. Conclusions: The trial showed the feasibility of perioperative APAP for OSA patients. Perioperative APAP treatment significantly reduced postoperative AHI and improved oxygen saturation in the patients with moderate and severe OSA.

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