title: [Characteristics of tympanic cavity pressure and static compliance in 0-6 years old children].
abstract: OBJECTIVE
  To explore the characteristics of tympanic cavity pressure and static compliance in different years old children.
  
  
  METHODS
  302 cases (567 ears) were studied. All cases were divided into five groups according to their age. Their tympanic cavity pressure and static compliance were tested.
  
  
  RESULTS
  Most tympanic cavity pressure ranged from +50 to -50 dapa in all groups. The volume of static compliance in group one is the largest (0. 71 ml), and it changed with the age. It gradually decreased from 3 month to 3 years old but increased after three years old until 6 years old then returned to the level in 1 year old.
  
  
  CONCLUSIONS
  The tympanic cavity pressure and static compliance are relevant to the age when children are small than 6 years. This characteristic must be considered on clinic diagnosis of middle ear disease and the evaluation of hearing.
authors.affiliation: Department of Otolaryngology, Guangzhou Children's Hospital, Guangzhou 510120.
authors.forename: Renzhong
authors.initials: R
authors.lastname: Luo
authors.forename: Ruijin
authors.initials: R
authors.lastname: Wen
authors.forename: Mei fen
authors.initials: Mf
authors.lastname: Wang
authors.forename: Jianwen
authors.initials: J
authors.lastname: Zhong
mesh_terms: D000158:Acoustic Impedance Tests / Q000592:standards*; D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D004432:Ear, Middle / Q000502:physiology*; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D011312:Pressure; D012016:Reference Values