| Objective To study the correlation research between PSG and X-ray nasopharyngeal lateral plain film of Adenoidal hypertrophy in children.Methods 133 children aged from 2 to 10 years old with adenoidal hypertrophy were selected for the experiment. All of them have not suffered from nasal deseases, such as rhinitis, nasosinusitis and deviation of nasal septum, craniocerebral injuries, acute upper respiratory tract infection within the latest one month. Adenoid examination: nasopharyngeal lateral plain films were taken in erect position or supine position during the patients'intakeperiod,5cm for the anode-film distance and 2cm under the external auditory canal opening. Method of measurement:thickness of adenoid and breadth of cavum nasopharyngeum were measured by electronic ruler on screens. A represent the thickness of adenoid. N represent the cavum nasopharyngeum. More than 7 hours night' sleep was monitored by polysomnography (PSG) according to the recently international standard. The monitoring item include several index such as snoring, airflow of mouth and nasal, oxygen saturation, movement of chest and abdomen and body position, and then summarizing sleep(test length, sleep period time, awake time, snoring times) and respiratory disturbance (apnea hyponea index, AHI), average blood oxygen levels, lowest saturation of blood oxygen(LsaO2). The correlation between the thickness of adeniod and PSG was observed according to the above items.Results The relationship between AHI and A/N ratio on X-ray nasopharyngeal lateral plain film present positive correlation, A/N ratio and LSaO2 show negative correlation when A/N ratio is more than 0.7. There is no correlation between A/N and AHI when A/N is less than 0.7.Conclusion The degree of adnoidal hypertrophy is the main reason to children'OSAHS and can be reflected by both A/N1 and A/N2 ratio. In addition, tonsil could not be regarded as alone reason to children's OSAHS. |
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