Clinical Profile and Diagnosis of Obstructive Sleep Apnea Syndrome using Overnight Polysomnography in a Tertiary Care Hospital

Background Obstructive sleep apnea is a highly prevalent yet largely under-diagnosed disease that poses a significant burden on the healthcare system. Objective To determine the role of predictors for Obstructive sleep apnea syndrome and its severity in Nepalese population. Method Prospective and analytical study conducted in the Department of Otorhinolaryngology and Head and Neck surgery at Kathmandu University Hospital between March 2018 and June 2020. A total of 85 adult patients with Obstructive sleep apnea with an Epworth sleepiness score greater than 10 were included. Overnight polysomnography was done and scoring of sleep associated events were done according to the American Academy of Sleep Medicine criteria. Participants were classified as simple snoring and mild, moderate or severe Obstructive sleep apnea syndrome groups depending on the Apnea Hypopnea Index values. Relationship of Apnea hypopnea index was analyzed with age, neck circumference, body mass index and Epworth Sleepiness score. Result Simple snoring was seen in 18(21.17%) patients, 14(16.47%) had mild Obstructive sleep apnea, 13(15.29%) had moderate Obstructive sleep apnea, whereas the severe group consisted of 40(47.05%) patients. The minimum Epworth Sleepiness Score was 10 and the maximum was 25. The Apnea hypopnea index correlated positively with Body mass index (p=.010) and Epworth sleepiness score (p <.001). However, Apnea hypopnea index had no association with age (p=.437) and neck circumference (p=.118). Conclusion Health professionals need to be extremely vigilant while examining patients presenting with Obstructive Sleep Apnea. Polysomnography is the investigation of choice in the early identification of this treatable disease.

Non Traumatic Coma in the Intensive Care Unit: Etiology and Prognosis

Background Impaired consciousness and coma is common reason for admission into the intensive care unit .It results from many etiological factors with varying outcome. Causes may vary in different parts of the world as is the outcome depending on the availability of appropriate care to deal with those patients. Objective To identify the etiological factors responsible for non traumatic coma and also evaluate if those factors influence the prognosis. Method This is a hospital based cross sectional study carried out at Nobel Medical College, Biratnagar between December 2019 and December 2020. All the patients who were admitted into the intensive care unit with coma due to non traumatic causes were included in the study. Result One hundred seven patients were enrolled in the study with mean age of the patient 54.5±19 years. There were 61(57%) male. Forty seven (43.9%) patients died while 60(56.1%) patients survived. Common etiological factors identified were impaired renal function 32(29.9%), anoxia 30 (28%), sepsis 28(26.2%), stroke 26(24.3%), metabolic derangement 21(19.6%). Coma due to sepsis was significantly associated with mortality (p=0.001) as was impaired renal function (p =0.035), cardiac disease (p=0.016) and low Glasgow Coma Scale (p=0.046). We did not find any association between age (p=0.53), gender (p=0.94) duration of coma (p=0.75) and mortality. Conclusion Impaired consciousness is a common problem encountered in the intensive care unit with very high mortality. Low Glasgow Coma Scale, Sepsis, impaired renal function and cardiac disease were associated with higher mortality.

Prevalance of Noise Induced Hearing Loss among Traffic Police Personnel of Kathmandu Metropolitan City

Background Noise induced hearing loss (NIHL) is a major preventable occupational health hazard. Objective To measure permanent threshold shift in traffic police personnel due to noise exposure and to examine whether it was associated with duration of noise exposure, years of work and risk factors. Methods Cross sectional, descriptive study conducted at Dhulikhel hospital, Kathmandu University Hospital in 110 responding traffic police personnel. Detailed history and clinical examination of ear, impedence audiometry and pure tone audiometry was performed. Results Mean age group was 29.82 years; 82(74.5%) were males and 28 (25.5%) were females. Mean duration of service is 11.86 years. Twenty six (23.6%) had tinnitus and 39(35.5%) had blocked sensation in ear. Sixty five (59.1%) worked between 10-19 years. Alcohol and smoking shows positive impact on NIHL (p value =0.00). Odds ratio with 95% confidence interval were 4.481 (1.925-10.432) and 6.578 (2.306-18.764) respectively. Among 73(66.4%) noise induced hearing loss positive cases, bilateral involvement was seen in 45 (40.9%) and unilateral in 28(25.4 %) cases. Among unilateral cases most were left sided. Hearing threshold at 4 kHz increased according to age and duration of service. Conclusion Traffic police personnel are in constant risk of noise induced hearing loss. Screening for hearing loss is recommended for people exposed to noise.DOI: http://dx.doi.org/10.3126/kumj.v9i4.6343 Kathmandu Univ Med J 2011;9(4):274-8