External acoustic meatus 92.5cm length, S-shaped curvature Between ext acoustic pore and tympanic membrane Beneath the skin lie the wax secreting ceruminous gland OParts: outer1/3 cartilaginous part, inner 2/3 osseous part While to examine or check tympanic membrane In adult: pull the auricle posteriorly superiorly In children: pull the auricle posteriorly inferiorly Ceruminal impaction Much cerumen block the external auditory meatus and affect the conduction of sound waveExternal acoustic meatus 2.5cm length, S-shaped curvature Between ext.acoustic pore and tympanic membrane Between ext.acoustic pore and tympanic membrane Beneath the skin lie the wax secreting ceruminous gland Parts:outer1/3 cartilaginous part,inner 2/3 osseous part While to examine or check tympanic membrane In adult: pull the auricle posteriorly & superiorly In children In children:pull the auricle posteriorly & inferiorly :pull the auricle posteriorly & inferiorly Ceruminal impaction Ceruminal impaction Much cerumen block the external auditory meatus and affect the conduction of sound wave. 8