![]() ![]() Greater auricular nerve (branch of the cervical plexus) - innervates the skin of the auricle.The sensory innervation to the skin of the auricle comes from numerous nerves: Venous drainage is via veins following the arteries listed above. Maxillary artery (deep auricular branch) - supplies the deep aspect of the external acoustic meatus and tympanic membrane only.The external ear is supplied by branches of the external carotid artery: The parts of the tympanic membrane moving away from the lateral process are called the anterior and posterior malleolar folds. The handle of malleus continues superiorly, and at its highest point, a small projection called the lateral process of the malleus can be seen. On the inner surface of the membrane, the handle of malleus attaches to the tympanic membrane, at a point called the umbo of tympanic membrane. The translucency of the tympanic membrane allows the structures within the middle ear to be observed during otoscopy. The membrane is connected to the surrounding temporal bone by a fibrocartilaginous ring. It is a connective tissue structure, covered with skin on the outside and a mucous membrane on the inside. The tympanic membrane lies at the distal end of the external acoustic meatus. It ends by running in an inferoanterior direction.In then turns slightly to move superoposteriorly.Initially it travels in a superoanterior direction.The external acoustic meatus does not have a straight path, and instead travels in an S-shaped curve as follows: The walls of the external 1/3 are formed by cartilage, whereas the inner 2/3 are formed by the temporal bone. If your child has ear canal stenosis and needs treatment, your doctor can help you decide on the best plan for your child.The external acoustic meatus is a sigmoid shaped tube that extends from the deep part of the concha to the tympanic membrane. They may also need a hearing device for hearing loss. Kids with severe stenosis may need surgery to widen the ear canal. Treatment may not be needed for mild ear canal stenosis. The doctor will check the child’s hearing and look for any other problems. How Is Ear Canal Stenosis Treated?Īll kids with ear canal stenosis need regular follow-up with an otolaryngologist (ear, nose, and throat doctor). That's because the bones around the ear grow a lot early in life. Imaging studies, such as a CT scan, usually aren't done until children are closer to 6 years old. ![]() ![]() If a baby has problems with how their outer ear formed or fails a newborn hearing screen, doctors will check for other problems by doing an exam and more hearing tests. It may be caused by genetic changes (mutations). What Causes Ear Canal Stenosis?ĭoctors don't know exactly why ear canal stenosis happens. Some children with ear canal stenosis also have a genetic syndrome such as Treacher Collins syndrome or Goldenhar syndrome. The cholesteatoma may damage the middle ear and lead to hearing problems. If skin and debris gets trapped in the ear canal and behind the eardrum, a cholesteatoma can develop. In more severe stenosis, kids may have hearing loss (because the sound can’t get through the narrow ear canal) and frequent infections of the ear canal (otitis externa). If the stenosis is mild, that may be the only sign. What Are the Signs & Symptoms of Ear Canal Stenosis?Įar canal stenosis can happen in one or both ears. If ear canal stenosis (stuh-NO-sis) leads to hearing loss or other problems, surgery can help. The parts of the inner ear, including the auditory (hearing) nerve, are usually normal. In some kids, the outer ear and eardrum don’t form normally. Most kids with the condition were born with it. Ear canal stenosis is a narrow ear canal. ![]()
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