Normal Polysomnography Values in Healthy Children and Adolescents in China

Exclusion Criteria

• •1. children with nocturnal snoring, continuous mouth breathing, difficulty breathing and apnea when sleep.
• •2. children with craniofacial abnormalities, such as Down's syndrome, Crouzon syndrome, achondroplasia, mandibular hypoplasia and facial mandibularetc hypoplasia.
• •3. children with history of upper respiratory tract infection nearly two weeks.
• •4. children with adenoids, tonsils, throat, glottis, trachea, lungs and history of thoracic surgery.
• •5. children with nose-sinusitis, allergic rhinitis, asthma, acut or purulent tonsillitis acute phase.
• •6. children with any medical or surgicaldiseases.
• •7. children who have to use use sedation to maintain sleep.
• •8. parents or child not understand the study or do not agree to take part in.