Long-term Effect of Continuous Positive Air Pressure Therapy on Intraocular Pressure in Patients with Primary Open-angle Glaucoma with Obstructive Sleep Apnea.

PURPOSE: Prevalence of glaucoma is higher in obstructive sleep apnea (OSA) patients. The gold standard technique to treat OSA is continuous positive airway pressure (CPAP) therapy. The influence of long-term CPAP therapy on intraocular pressure (IOP), blood pressure, ocular perfusion pressure (OPP), and glaucoma progression in primary open-angle glaucoma (POAG) patients was evaluated. DESIGN: Prospective study. MATERIALS AND METHODS: In this study, we enrolled 12 eyes from six POAG patients aged >35 years, with newly diagnosed OSA and with indication for CPAP therapy. The CPAP was performed for 12 months. We monitored the IOP every 3 months. Visual field was determined at baseline and 12 months. RESULTS: The mean IOP after CPAP therapy for 12 months was significantly higher than the mean baseline IOP (average IOP 3 months before CPAP therapy) (19.08 ± 3.47 vs 17.83 ± 2.88 mm Hg; p = 0.006). The IOP rising rate was 0.69 ± 0.47/years (p = 0.138) before CPAP therapy and increased to 1.13 ± 0.47/years (p = 0.016) after CPAP therapy. The OPP after 12 months of CPAP was significantly lower than the baseline (42.21 ± 5.29 vs 45.24 ± 7.09 mm Hg; p = 0.06). Results showed that the pattern standard deviation (PSD) value of 24-2 short wavelength automated perimetry (SWAP) visual field was reduced from 5.34 ± 3.92 to 4.77 ± 3.73 (p = 0.025). Antiglaucoma medication was administered to a patient due to increased IOP without glaucoma progression evidence. CONCLUSION: The POAG and OSA patients demonstrated significant IOP rising after CPAP therapy but did not show progression of glaucomatous damage. Mean deviation (MD), PSD, and visual field index (VFI) were not significantly different after CPAP therapy. PRÉCIS: Prospective study of POAG and OSA patients demonstrated significant IOP rising after CPAP therapy for a year. The study did not show progression of glaucomatous damage. HOW TO CITE THIS ARTICLE: Hirunpatravong P, Kasemsup T, Ayudhya WN, et al. Long-term Effect of Continuous Positive Air Pressure Therapy on Intraocular Pressure in Patients with Primary Open-angle Glaucoma with Obstructive Sleep Apnea. J Curr Glaucoma Pract 2019;13(3):94-98.

A cost-utility analysis of laparoscopic radical prostatectomy and robotic-assisted laparoscopic radical prostatectomy in men with localized prostate cancer in Thailand.

OBJECTIVE: Robotic machines are being used with increasing frequency in the treatment of clinically localized prostate cancer in Thailand. While robotics may offer some advantages, it remains unclear whether potential benefits offset higher costs. The objective of this study was to evaluate and compare cost utility between standard and robotic-assisted laparoscopic prostatectomy from a health system perspective. MATERIAL AND METHOD: The authors created a care pathway and a model to facilitate a comprehensive cost utility analysis. All variables used in our model were derived from our review of the literature, exceptfor cost, utility for erectile dysfunction, and utility for urinary incontinence, which were derived from Chulalongkorn Hospital patient records. All costs described in this report are denominated in Thai baht, with a 2012 currency value. A positive margin was used to simulate the model. Sensitivity analysis was performed to estimate the robustness of the outcome. RESULTS: Thailand utility values for erectile dysfunction and urinary incontinence were 0.86 and 0.81, respectively. The cost of robotic laparoscopy was, on average, 120,359 baht (95% CI, 89,368-151,350 baht) higher than standard laparoscopy and was more effective with a mean gain of 0.05 quality-adjusted life years (QALYs) (95% CI, 0.03-0.08) for the 100 procedures performed each year. The incremental cost effectiveness (ICER) ratio was 2,407,180 baht per QALYs, with a very low probability that robotic prostatectomy would be cost effective at the Thai-willingness-to pay (WTP) threshold of 160,000 baht/ QALY. CONCLUSION: Robotic-assisted laparoscopic prostatectomy is not more cost effective than standard laparoscopic prostatectomy for the 100 cases performed each year. An increase in the number of cases may result in better economies of scale and a lower ICER, an outcome that may increase the overall value and cost effectiveness of an investment in this technology.

Prevalence and risk factors for central sleep apnea in infants with laryngomalacia.

OBJECTIVE: To identify the prevalence of and risk factors for central sleep apnea (CSA) in infants who are diagnosed with laryngomalacia. STUDY DESIGN: Case series with chart review. SETTING: Quaternary care pediatric hospital. SUBJECTS AND METHODS: We performed a chart review in infants with laryngomalacia. All infants had diagnostic polysomnography (PSG) performed from 2003 to 2012. Infants who underwent supraglottoplasty or other upper airway surgery prior to PSG were excluded. CSA was defined as central apnea index ≥ 5. Demographic data, underlying diseases, and PSG data were reviewed and analyzed. RESULTS: Fifty-four patients met the inclusion criteria. The mean age at the date PSG was performed was 3.4 ± 2.7 months. The prevalence of CSA in infants with laryngomalacia was 46.3%. Odds ratio (OR) of CSA was above 2.0 in patients with the following risk factors: underlying neurologic disease, hypotonia, or syndrome (OR = 2.5, P = .13), history of apparent life-threatening events (OR = 2.7, P = .19), premature infants (OR = 2.2, P = .33), and age less than 3 months (OR = 2.3, P = .15). However, none of the risk factors were statistically significant. Analysis of sleep architecture revealed a decrease in total sleep time (345.4 ± 70.6 minutes vs 393.5 ± 68.3 minutes, P = .02) and sleep efficiency (67.7 ± 8.9% vs 75.2 ± 9.3%, P = .004) in the CSA group. CONCLUSION: CSA is relatively common in infants with laryngomalacia. There seems to be a higher prevalence of CSA in infants with certain risk factors, but none of the risk factors are statistically significant. The presence of CSA can lead to alteration in sleep architecture. In addition to clinical evaluation, polysomnography may be warranted for the evaluation of infants with laryngomalacia and associated complex medical conditions.

Behavioral sleep disturbances in children clinically referred for evaluation of obstructive sleep apnea.

OBJECTIVE/BACKGROUND: Obstructive sleep apnea (OSA) and behavioral sleep disturbances (BSD) are known to have a negative health impact on children. OSA and BSD may coexist; however, such comorbidity is not fully appreciated in clinical settings. METHODS: Patients referred for OSA evaluation completed polysomnography and the Children's Sleep Habits Questionnaire. Prevalence estimates for clinically significant BSD were computed and comorbidity of BSD and OSA was examined. Chart reviews were completed to determine if BSD were addressed in the medical treatment plan. RESULTS: Over one-half of the sample had a clinically significant BSD. Patients with comorbid OSA and BSD represented 39.46% of the sample. In 36-54% of the patients with a clinically significant BSD, no plan to treat the BSD was documented in the patient's medical record. CONCLUSIONS: Children referred for evaluation of OSA have a high likelihood of experiencing clinically significant BSD irrespective of OSA diagnosis. Sleep medicine clinicians should be careful not to overlook the potential impact of BSD even after a child has been formally diagnosed with OSA. Physician knowledge of empirically supported behavioral sleep treatments or access to behavioral sleep medicine services is an essential component of comprehensive care for children clinically referred for OSA evaluation.