H90.12

Clinical Causes: Ear infections (otitis media) causing fluid buildup or inflammation Earwax blockage obstructing the ear canal Eustachian tube dysfunction leading to pressure imbalance Perforation or rupture of the eardrum Abnormal growths or tumors, such as cholesteatoma Ossicular chain abnormalities or dislocation, affecting the tiny bones in the middle ear Congenital malformations of the outer or middle ear structures Trauma or injury to the outer or middle ear Foreign bodies lodged in the ear canal Scarring or thickening of the eardrum (myringosclerosis)

Key Symptoms: Difficulty hearing sounds or speech on the left side Perception that sounds are muffled or less clear from the left ear Difficulty localizing sound sources or determining the direction of sounds Possible discomfort or a feeling of fullness in the affected ear Tinnitus, or ringing in the affected ear (less common) No symptoms in the right ear, which retains normal hearing

Diagnosis Path: Diagnosis typically involves a detailed hearing assessment, including audiometry tests to measure hearing levels in each ear. Otoscopy may reveal abnormalities within the ear canal or eardrum. Additional tests such as tympanometry assess middle ear function, while imaging studies might be utilized if structural abnormalities or growths are suspected. A healthcare professional evaluates symptoms, medical history, and test results to confirm the diagnosis of unilateral conductive hearing loss.

Treatment Protocols: Treatment depends on the underlying cause. Some common approaches include: - Removal of earwax or foreign bodies - Medical treatment for infections with antibiotics or anti-inflammatory medications - Surgical procedures such as repairing a perforated eardrum or reconstructing ossicular chain - Managing Eustachian tube dysfunction through medications or specialized techniques - In cases of growths like cholesteatomas, surgical removal may be required - Use of hearing aids or assistive listening devices if necessary to improve hearing function Patients should consult an ENT specialist for tailored treatment options based on their specific condition.