الفهرس 
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Abstract
Obstructive sleep apnea (OSA) is the most common sleep-related breathing disorders that are characterized by obstructive apneas, hypopneas and/or respiratory effort related arousal (RERA). OSA caused by repetitive collapse of the upper airway during sleep. The diagnosis should be considered whenever a patient presents with risk factors or clinical manifestations that are compatible with OSA.
Gestational hypertension is one of the most serious problems in pregnancy. The high prevalence of obstructive sleep apnea (OSA) is under-recognized among clinicians who manage patients with gestational hypertension.
The aim of this work was to study the presence of sleep-related breathing disorders in Egyptian females suffering from gestational hypertension.
The present study included thirty three females with gestational hypertension diagnosed according to established criteria. After history taking which included Epworth sleepiness scale (ESS) and clinical apnea score, clinical examination and routine laboratory investigations, All patients were subjected to the following: anthropometric measurements (body mass index; BMI, neck circumference; NC, and waist to hip ratio; W/H), serum albumin and overnight cardio-respiratory screening using level III polysomnography. Manual analysis and scoring were performed using criteria established by the American Academy of Sleep Medicine.
In the present study, the age ranges between 19 and 42 years (mean±SD 29.85 ± 5.79). BMI ranges between 26.5 and 41.2 kg/m2 (mean±SD was 33.59 ± 3.46), 29 patients of them (87%) were obese. The NC ranges between 28 and 41 cm (mean±SD = 34.42 ± 3.68) and the W/H ranges between 0.89 and 1.08 (mean ± SD = 0.97 ± 0.05).
The systolic BP ranged between 150 and 190 mmHg (mean±SD value of 172.27 ± 9.28). The diastolic BP ranged between 85 and 115 mmHg (mean±SD value of 100.61 ± 6.93).
As regards presence of hypersomnolence, 13 patients (39%) had Epworth sleepiness scale (ESS) of 10/24 or more. The apnea-hypopnea index (AHI) ranged between 0.4 and 32.7 (mean±SD value of 9.16 ± 8.17). Seventeen patients (51.5%) had OSA. Eleven patients (33.3%) had mild OSA, 5 patients (15.1%) had moderate OSA and 1 patient (3.1%) had severe OSA.
The t90% ranges between 0 and 5.7 %. Albumin level (gm/dl) ranged between 1.8 and 5 (mean±SD value of 3.46 ± 0.93).
In the present study the NC showed statistically significant direct correlation with Mean saturation %, AHI, ODI 3%, Serum albumin, Clinical apnea score and Epworth sleepiness scale.
Also we found that the W/H ratio showed statistically significant direct correlation with Epworth sleepiness scale.AHI, ODI 3% and Serum albumin.