The Evaluation and Management of Sleep Disordered Breathing During Perioperative Period

Obstructive sleep apnea (OSA) is a syndrome defined frequently by decrease in arterial oxygen saturation, repeated upper airway obstruction episodes, increases in sympathetic output and tone, and repetitive arousals during sleep. OSA is the most common form of sleep-disordered breathing. In the United States, it has been estimated that 4% of middle aged males and 2% of middle aged females have OSA. Nevertheless the majority of patients who affect from OSA are undiagnosed and untreated. All these evidences imply that a prominent portion of OSA patients who undergo surgery will not be diagnosed and that the physicians must screen patients suspected of having sleep-disordered breathing to customize the anesthetic care and start necessary evaluations and therapy

Evaluation of choroidal thickness using spectral-domain optical coherence tomography in patients with severe obstructive sleep apnea syndrome: a comparative study

AIM: To assess choroidal thickness in patients with severe obstructive sleep apnea syndrome (OSAS) and compare them with healthy controls, using spectral domain optical coherence tomography (OCT). METHODS: In this observational, cross-sectional study, choroidal thicknesses of 23 newly severe OSAS patients and 23 body mass index- age- and sex-matched healthy subjects were measured using a high -speed, high resolution frequency domain-OCT device (lambda=840 nm, 26 000 A -scans/s, 5 pm axial resolution). All patients underwent a complete ophthalmic examination before the measurements. OCT measurements were taken at the same time of day (9:00 a.m.), in order to minimize the effects of diurnal variation. RESULTS: There was a statistically significant difference in median choroidal thickness between the OSAS patients (201 pm; range 145 -237 pm) and the controls (324 pm; range 296 -383 mu m; P <0.001). There were significant differences at all measurement points (P <0.001 for all). The apnea -hypopnea index (AHI) values were more than 30 in all OSAS patients and the mean AHI was 48.57 +/- 6.54. The interexaminer intraclass correlation coefficient (ICC) for the mean choroidal thickness was 0.938 (95%CI, 0.908-0.985) and ICC was greater than 0.90 for all measurement points. CONCLUSION: The decreased choroidal thickness of patients with severe OSAS might be related to the the autonomic disregulation associated with this disease. Further studies are needed to evaluate the etiopathologic relationship between choroidal thickness and OSAS

Approach of pulmonologists in Turkey to noninvasive mechanical ventilation use at home for chronic respiratory failure

WOS: 000386262800001PubMed ID: 27266279Introduction: To define approach of pulmonologists in Turkey to noninvasive mechanical ventilation ( NIV) use for chronic respiratory failure ( CRF), the most currently applied technique for home mechanical ventilation. Patients and Methods: A 38-question survey, developed and tested by the authors, was distributed throughout Turkey to 2205 pulmonologists by e-mail. Results: Twenty-seven percent of the pulmonologists responded ( n= 596). Domiciliary NIV was reported to be prescribed by 340 physicians [ 57.1% of all responders and 81% of pulmonologists practicing NIV at clinical practice ( n= 420)]. NIV prescription was associated with physician's title, type of hospital, duration of medical license, total number of patients treated with NIV during residency and current number of patients treated with NIV per week ( p< 0.05). Main estimated indications were listed as chronic obstructive pulmonary disease ( median, 25-75 percentile of the prescriptions: 75%, 60-85), obesity hypoventilation syndrome ( 10%, 2-15), overlap syndrome ( 10%, 0-20) and restrictive lung disease ( 5%, 2-10). For utilization of NIV at home, Bilevel positive airway pressure-spontaneous mode ( 40%, 0-80) and oronasal mask ( 90%, 60-100) were stated as the most frequently recommended mode and interface, respectively. Pressure settings were most often titrated based on arterial blood gas findings ( 79.2%). Humidifier was stated not to be prescribed by approximately half of the physicians recommending domicilliary NIV, and the main reason for this ( 59.2%) was being un-refundable by social security foundation. Conclusion: There is a wide variation in Turkey for prescription of NIV, which is supposed to improve clinical course of patients with CRF. Further studies are required to determine the possible causes of these differences, frequency of use and patient outcomes in this setting

Approach of pulmonologists in Turkey to noninvasive mechanical ventilation use in acute respiratory failure

Introduction: Noninvasive mechanical ventilation (NIV) has been increasingly used worldwide for acute respiratory failure (ARF), especially in patients with chronic lung disorders. We aimed to define the approach of pulmonologists in Turkey to NIV use for ARF management. Materials and Methods: A 38-question survey, developed and tested by authors, was distributed by e-mail to a total of 2.205 pulmonologists in Turkey. Results: Response rate was 27% (n=596). Seventy-one percent of responders were practicing NIV in clinic. NIV use was found to be associated with responder's academic title, age, duration of medical license, type of physician's hospital and its region, patient load, NIV experience during residency, and duration of NIV and intensive care unit (ICU) experience (p 60% of patients with COPD, and success rate in COPD was reported as over 60% by 93% of users. Oronasal mask (median and IQR 90, 80-100%, respectively) and home care NIV ventilators (median and IQR 50, 10-85%, respectively) were the most commonly utilized equipment. Conclusion: NIV use in ARF varies based on hospital type, region and, especially, experience of the physician. Although consistent with guidelines and general practice, NIV use can still be improved and increased

Approach of pulmonologists in Turkey to noninvasive mechanical ventilation use at home for chronic respiratory failure

WOS: 000386262800001PubMed ID: 27266279Introduction: To define approach of pulmonologists in Turkey to noninvasive mechanical ventilation ( NIV) use for chronic respiratory failure ( CRF), the most currently applied technique for home mechanical ventilation. Patients and Methods: A 38-question survey, developed and tested by the authors, was distributed throughout Turkey to 2205 pulmonologists by e-mail. Results: Twenty-seven percent of the pulmonologists responded ( n= 596). Domiciliary NIV was reported to be prescribed by 340 physicians [ 57.1% of all responders and 81% of pulmonologists practicing NIV at clinical practice ( n= 420)]. NIV prescription was associated with physician's title, type of hospital, duration of medical license, total number of patients treated with NIV during residency and current number of patients treated with NIV per week ( p< 0.05). Main estimated indications were listed as chronic obstructive pulmonary disease ( median, 25-75 percentile of the prescriptions: 75%, 60-85), obesity hypoventilation syndrome ( 10%, 2-15), overlap syndrome ( 10%, 0-20) and restrictive lung disease ( 5%, 2-10). For utilization of NIV at home, Bilevel positive airway pressure-spontaneous mode ( 40%, 0-80) and oronasal mask ( 90%, 60-100) were stated as the most frequently recommended mode and interface, respectively. Pressure settings were most often titrated based on arterial blood gas findings ( 79.2%). Humidifier was stated not to be prescribed by approximately half of the physicians recommending domicilliary NIV, and the main reason for this ( 59.2%) was being un-refundable by social security foundation. Conclusion: There is a wide variation in Turkey for prescription of NIV, which is supposed to improve clinical course of patients with CRF. Further studies are required to determine the possible causes of these differences, frequency of use and patient outcomes in this setting

Carotid intima-media thickness in chronic obstructive pulmonary disease and survival: A multicenter prospective study

Introduction Chronic obstructive pulmonary disease (COPD) is associated with increased cardiovascular morbidity and mortality. Carotid intima-media thickness (CIMT) is a noninvasive method assessing atherosclerosis. Objective It was aimed to determine relationship and survival between COPD and CIMT. Methods CIMT was measured using Doppler ultrasound (USG) in 668 stable COPD patients at 24 centers. Patients were followed-up for 2 years. Results There were 610 patients who completed the study. There were 200 patients CIMT with = 0.78 mm (group 2). There was a significant difference at the parameters of age, gender, smoking load, biomass exposure, GOLD groups and degree of airway obstruction (FEV1) between groups 1 and 2. Our results revealed positive correlations between mean CIMT and age, smoking load (pack-years), biomass exposure (years), exacerbation rate (last year), duration of hypertension (years) and cholesterol level; negative correlations between CIMT and FEV1 (P 0.05). Conclusion This study is the first regarding CIMT with combined GOLD assessment groups. It has revealed important findings supporting the increase in atherosclerosis risk in COPD patients. We recommend Doppler USG of the carotid artery in COPD patients at severe stages