Obstructive sleep apnea (OSA) has been associated with dysregulation of the hypothalamic–pituitary–adrenal axis and alterations in glucose metabolism with increased risk for type 2 diabetes. The aim ...of the current study was to compare morning plasma cortisol levels and glucose metabolism parameters between moderate (apnea–hypopnea index (AHI): 15–30 events/h) and severe OSA patients (AHI >30 events/h), with respective controls. A total of 56 male OSA patients, 24 moderate (AHI = 21.1 ± 5.3) and 32 severe (AHI = 49.7 ± 18.1), underwent a full-night polysomnography, oral glucose tolerance test (OGTT), and measurement of morning plasma cortisol levels. These groups were compared to 20 matched subjects in a control group. Morning plasma cortisol levels were statistically lower in severe OSA group than in moderate OSA and control groups (303.7 ± 93.5 vs. 423.9 ± 145.1 vs. 417.5 ± 99.8 pmol/L,
P
< 0.001). Significant negative correlations were found between morning plasma cortisol levels and AHI (
r
= −0.444,
P
= 0.002), as well as oxygen desaturation index (
r
= −0.381,
P
= 0.011). Fasting plasma glucose (5.0 ± 0.5 vs. 5.4 ± 0.7 vs. 4.9 ± 0.6 mmol/L,
P
= 0.009) was higher in the severe OSA group compared to moderate OSA and controls. Homeostasis model assessment insulin resistance (HOMA-IR) was higher in the severe OSA group compared to moderate OSA and controls (4.6 ± 3.7 vs. 2.7 ± 2.0 and 2.2 ± 1.8, respectively,
P
= 0.006). In conclusion, our study showed that morning plasma cortisol levels measured at 8 a.m. were significantly lower in severe OSA patients than those in moderate OSA group and controls. Morning plasma cortisol levels showed a negative correlation with AHI and oxygen desaturation index. Additionally, this study confirmed the evidence of glucose metabolism impairment in moderate and severe OSA patients, with more pronounced effect in the severe OSA patients group.
Purpose: Due to the possible interplay of factors predisposing to severe COVID-19 outcomes and negative health consequences of poorly controlled OSA, adherence to continuous positive airway pressure ...(CPAP) therapy among OSA patients might be crucial during COVID-19 pandemics. Lockdown-related changes in CPAP adherence were investigated in CPAP users willing to participate in this study. Pre-lockdown adherence, age, gender, comorbidities and anxiety were analyzed as predictors of COVID-19 lockdown adherence. Patients and Methods: A cross-sectional study performed at Split Sleep Medicine Center included 101 severe OSA patients (78.2% male). CPAP memory cards were assessed during 6 months of pre-lockdown and 40 days of lockdown (March/April 2020) period. A total of 81 patients in pre-lockdown met good CPAP adherence criteria (greater than or equal to4 hours/night on 70% nights). Results: CPAP adherence improved during COVID-19 lockdown in the total sample of severe OSA patients. The percentage of adherent nights and CPAP usage hours per night increased during lockdown in good pre-lockdown CPAP adherers (p=0.011 and p=0.001, respectively), women (p=0.003 and p=0.001, respectively) and respondents younger than 58 years (p=0.007 and p<0.001, respectively). Out of 20/101 poor pre-lockdown CPAP adherers, 9 have shifted to good lockdown adherence. When comorbidities, BMI and anxiety were taken into account, older and male respondents were recognized as less likely to improve CPAP usage hours during lockdown (R.sup.2=9.4%; p=0.032). Conclusion: The lockdown-related CPAP adherence improved in severe OSA patients, with a shift in almost half of poor pre-lockdown adherers towards good lockdown CPAP adherence. Women, younger and good pre-lockdown CPAP adherers were more adherent during lockdown. Despite being vulnerable groups for both OSA and COVID-19, no expected adherence improvements were observed in men and older patients. Keywords: OSA, CPAP, CPAP adherence, COVID-19, lockdown
Obstructive sleep apnea (OSA) has become major public concern and is continuously investigated in new aspects of pathophysiology and management. Urotensin II (UII) is a powerful vasoconstrictor with ...a role in cardiovascular diseases. The main goal of this study was to evaluate serum UII levels in OSA patients and matched controls. A total of 89 OSA patients and 89 controls were consecutively enrolled. A medical history review and physical examination of the participants was conducted, with polysomnography performed in the investigated group. UII levels and other biochemical parameters were assessed according to the standard laboratory protocols. The median AHI in the OSA group was 39.0 (31.4-55.2) events/h, and they had higher levels of hsCRP when compared to control group (2.87 ± 0.71 vs. 1.52 ± 0.68 mg/L;
< 0.001). Additionally, serum UII levels were significantly higher in the OSA group (3.41 ± 1.72 vs. 2.18 ± 1.36 ng/mL;
< 0.001), while positive correlation was found between UII levels and hsCRP (r = 0.450;
< 0.001) and systolic blood pressure (SPB) (r = 0.317;
< 0.001). Finally, multiple regression analysis showed significant association of UII levels with AHI (0.017 ± 0.006,
= 0.013), SBP (0.052 ± 0.008,
< 0.001) and hsCRP (0.538 ± 0.164,
= 0.001). As UII levels were associated with blood pressure and markers of inflammation and OSA severity, it might play an important role in the complex pathophysiology of OSA and its cardiometabolic complications.
The “commando operation” is an extensive surgical procedure used to treat patients with oral squamous carcinoma and metastasis in the cervical lymph nodes. While the procedure can be curative, it is ...also very mutilating, which consequently has a major impact on the patient’s quality of life. Several studies showed that the procedure is associated with loss of certain functions, such as impairments in speech, chewing, swallowing, and loss of taste and appetite. Furthermore, some of these impairments and their degree depend on the reconstruction method. However, the data regarding the functional impairments and aesthetic results in patients who underwent the “commando operation” along with the pectoralis major myocutaneus flap reconstruction are still inconclusive. This study included 34 patients that underwent partial glossectomy, ipsilateral modified radical neck dissection, pectoralis major myocutaneus flap reconstruction, and adjuvant radiotherapy. A structured questionnaire was used to evaluate aesthetical results and functional impairments as well as to grade the level of satisfaction with the functional and aesthetic outcomes both by the patients and by the operator. Most of the patients stated that their speech (N = 33; 97%) and salivation (N = 32; 94.2%) severely changed after the operation and that they cannot chew (N = 33; 97%) and swallow (N = 33; 97%) the same as before the operation. Moreover, almost half of the patients (N = 16; 47%) reported that they have severe sleep impairments. However, only few of the included patients stated that they sought professional help regarding the speech (N = 4; 11.7%), eating (N = 5; 14.7%), and sleeping (N = 4; 11.7%) disturbances. Additionally, there was a statistically significant difference between the operator and the patients in the subjective assessment of the aesthetic results (p = 0.047), as operators gave significantly better grades. Our results imply that this procedure and reconstructive method possibly cause impairments that have an impact on the patients’ wellbeing. Moreover, our outcomes also suggest that patients should be educated and rehabilitated after the “commando operation” since most of them were reluctant to seek professional help regarding their impairments. Lastly, sleep deficiency, which was observed after the procedure, should be further explored.
Abstract
Study Objectives
The aim of this study was to investigate differences in dual-energy X-ray absorptiometry (DXA) parameters, trabecular bone score (TBS), bone turnover markers and inactive ...matrix Gla protein (dp-ucMGP) between patients with obstructive sleep apnea (OSA) and healthy controls.
Methods
This study enrolled 53 male patients diagnosed with OSA, and 50 age- and body mass index (BMI)-matched control subjects. All participants underwent DXA imaging, TBS assessment and blood sampling for biochemical analysis of bone metabolism markers.
Results
Mean apnea–hypopnea index (AHI) score of OSA patients was 43.8 ± 18.8 events/h. OSA patients had significantly higher plasma dp-ucMGP levels in comparison to controls (512.7 ± 71.9 vs. 465.8 ± 50.9 pmol/L, p < 0.001). OSA and control group did not significantly differ regarding standard DXA results, while TBS values were significantly lower in the OSA group (1.24 ± 0.17 vs. 1.36 ± 0.15, p < 0.001). AHI score was a significant independent correlate of plasma dp-ucMGP levels (β ± SE, 1.461 ± 0.45, p = 0.002). In addition, TBS retained a significant relationship with dp-ucMGP values (β ± SE, −93.77 ± 38.1, p = 0.001).
Conclusions
dp-ucMGP levels are significantly higher in patients with OSA and correlate with disease severity. In addition, TBS values in OSA patients are lower in comparison with the control group and decrease with disease severity.
This study aimed to provide the evidence on effect of mandibular advancement device (MAD) therapy on long-term cognitive and psychomotor performance, excessive daytime sleepiness, and quality of life ...in patients with mild to moderate obstructive sleep apnea (OSA).
A total of 15 patients with mild to moderate OSA were treated with MAD therapy and they were followed up after 3 mo and 1 y of therapy. The patients were tested on three different tests of cognitive and psychomotor performance using the computer-based system Complex Reactionmeter Drenovac (CRD-series) at baseline and at the time of follow-up, and the 36-Item Short Form Health Survey (SF-36) questionnaire and Epworth Sleepiness Scale were used to assess their quality of life and excessive daytime sleepiness, respectively.
The mean apnea-hypopnea index (AHI) decreased significantly from 22.9 ± 5.9 events/h at baseline, to 9.7 ± 4.5 events/h after 1 y of MAD therapy (p < 0.001). There was significant improvement on all three CRD-series tests used after 1 y of MAD therapy, considering total test solving time (TTST) and minimal single task solving time (MinT), whereas total number of errors committed during the tests (TE) remained unchanged. Self-reported measures, excessive daytime sleepiness, and three domains of quality of life, social functioning, general health perception, and health change following MAD therapy showed significant improvements after 1 y of MAD therapy.
This study demonstrates significant improvements in cognitive and psychomotor performance, particularly in the domain of perceptive abilities, convergent thinking (constructing and solving simple mathematical tasks) and psychomotor reaction times, excessive daytime sleepiness, and quality of life in patients with mild to moderate OSA following MAD therapy.
Study objectives
We prospectively investigated the effects of continuous positive airway pressure (CPAP) on long-term cognitive and psychomotor performances, and excessive daytime sleepiness in ...severe obstructive sleep apnea (OSA) patients.
Methods
A total of 40 patients were recruited and 23 patients with severe OSA fully completed the study protocol to investigate the effects of CPAP therapy on psychomotor performance at 1, 3, and 6 months and 1 year following initiation of the therapy. Psychomotor CRD-series tests measuring reaction times of light stimulus perception, solving simple arithmetic operations, and complex psychomotor limb coordination, were used in this study. The data collected following CPAP therapy were compared to baseline values prior to the CPAP treatment for each patient.
Results
All of the measured variables improved following CPAP treatment. However, the most pronounced effect was observed in improvement of reaction times to complex psychomotor limb coordination test (
p
< 0.05). Self-reported evaluation of excessive daytime sleepiness measured by Epworth Sleepiness Scale (ESS) showed significant decrease from 10.0 ± 1.1 before to 3.5 ± 0.5 (
p
< 0.001), after 1 year on CPAP therapy.
Conclusions
The CPAP therapy improved cognitive and psychomotor performance on CRD-series tests with the most significant improvement observed in complex psychomotor limb coordination of severe OSA patients.
Midface fractures can cause airway obstruction and breathing disturbances. The purpose of the present study was to determine the prevalence of undiagnosed obstructive sleep apnea (OSA) among patients ...with surgically treated maxillary and zygomatic fractures.
We retrospectively analyzed the medical records of 44 patients who had undergone surgical treatment of maxillary or zygomatic fractures between Jan. 1, 2003, and Dec. 31, 2013 at a single centre. All participants underwent polygraphy testing and were asked to complete the STOP (snoring, tiredness, observed apnea and high blood pressure) questionnaire, Nasal Obstruction Symptom Evaluation (NOSE) scale and Epworth Sleepiness Scale.
There were 27 participants (61%) with maxillary fracture and 17 (39%) with zygomatic fracture. Obstructive sleep apnea was diagnosed in 24 (54%) of the 44 participants, of whom 15 (62%) had maxillary fractures and 9 (38%) had zygomatic fractures. Participants with OSA had a mean Apnea–Hypopnea Index (AHI) of 15.5 (standard deviation SD 9.7) events/h, compared to 2.4 (SD 1.5) events/h for those without OSA (p < 0.001). Of the 30 participants with nose obstruction, 18 (60%) had an AHI of 5 or greater.
The results suggest that the prevalence of OSA was higher in surgical patients with midface fractures, independent of the type of fracture, than in the general population. The NOSE scale results showed significant correlation with the presence of OSA.
Study objectives
An independent association between obstructive sleep apnea (OSA) and cardiovascular events has been reported, suggesting that OSA may lead to cardiometabolic dysregulation. We ...prospectively investigated the effect of mandibular advancement device (MAD) treatment on arterial stiffness, glucose metabolism, and certain inflammatory markers as predictors of cardiometabolic risk in mild to moderate OSA patients.
Methods
A total of 18 patients with mild to moderate OSA were prospectively enrolled in the study to determine the effects of MAD treatment at 3 months and 1 year following initiation of the treatment. Sleep studies, arterial stiffness assessment, and laboratory analyses were obtained at the baseline and at the time of follow-up. The data collected at 1 year were compared to baseline values.
Results
There was a significant decrease in apnea-hypopnea index (AHI) after 1 year of treatment when compared to baseline (22.9 ± 5.9 to 9.7 ± 4.5,
P
< 0.001). Furthermore, MAD treatment was associated with reduced levels of fasting plasma glucose values after 1 year of treatment (5.3 ± 0.5 to 4.9 ± 0.5 mmol/L,
P
< 0.001), as well as fasting plasma insulin values (14.1 ± 7.8 to 10.9 ± 6.4 μU/mL,
P
< 0.05) and HOMA-IR (3.3 ± 1.8 to 2.4 ± 1.4,
P
< 0.001). There was significant improvement in pulse wave velocity (9.3 ± 1.9 m/s at baseline to 8.1 ± 1.7 m/s,
P
< 0.05) after 1 year of treatment. Plasma level of an inflammatory marker fibrinogen decreased significantly from 3.4 ± 0.7 at baseline to 3.0 ± 0.9, (
P
< 0.05) at 1-year follow-up.
Conclusions
The MAD treatment improved arterial stiffness, glucose metabolism, and insulin resistance in mild to moderate OSA patients after 1 year of treatment.
Purpose
Growing awareness of obstructive sleep apnea syndrome (OSAS) has increased the need for concise and reliable screening tools. The Epworth sleepiness scale (ESS) has been validated in numerous ...languages and ethnic groups, since it was originally designed for the English-speaking population. The STOP questionnaire was developed as a novel OSAS screening tool in surgical patients, but has not been validated in the general population. The present study was undertaken to provide reliable and validated ESS in the Croatian language and to evaluate the ESS and STOP as screening instruments for OSAS.
Methods
The Croatian version of ESS and STOP questionnaire was administered to 217 patients referred to the Split Sleep Medicine Center and 208 healthy control subjects. Test–retest reliability was investigated in 20 healthy subjects.
Results
The ESS score was significantly higher for the patients referred to the Split Sleep Medicine Center compared to the control group (8.2 ± 5.0 vs. 5.9 ± 3.8,
p
< 0.001). Cronbach's alpha coefficient for the ESS Croatian version was 0.84 indicating an excellent internal consistency. Reproducibility revealed no significant difference in each item or in the total ESS scores. Receiver operating curve of the ESS for identification of cases with AHI >5/h was 0.64, and for the STOP questionnaire, it was 0.84.
Conclusions
Both ESS and STOP questionnaires successfully distinguished healthy subjects from subjects with OSAS. The STOP questionnaire had better probability to correctly predict high-risk patients for OSAS compared to ESS. We propose that the STOP questionnaire could be used as an easy-to-use and accurate screening tool in identification of patients with risk for OSAS in the general population, but it has not been tested in the Croatian population yet.
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