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Effect of different blood groups on tympanometric findings and acoustic reflex thresholds. 2020

Prashanth Prabhu, and Sneha Roslyn Shaji, and Krishnapriya Moothedath Vipinan, and Niveditha Valiyaparambil Ramanunny, and Basaiahgari Nagaraju
All India Institute of Speech and Hearing, Mysore, 570006, Karnataka, India. prashanth.audio@gmail.com.

OBJECTIVE The blood group can have an effect on the auditory system, and it is suggested that it could be an indicator of noise-induced hearing loss. There could be changes in the immittance findings, too, in adults having different blood groups. The present study attempted to determine if there are any differences in tympanometric results (admittance, peak pressure, gradient, resonance frequency, and ear canal volume) and acoustic reflex thresholds (ART) at 500, 1000, 2000 and 4000 Hz between individuals with different blood groups (A positive, B positive, O positive and AB positive). METHODS Eighty normal hearing adults between the age of 18 and 27 years were considered for the study. They were divided into 20 participants, each with blood groups A, B, AB, and O. The immittance findings were recorded from all the participants of the study. RESULTS The results showed that the resonance frequency was slightly higher in blood group O compared to other blood groups. Also, the acoustic reflex thresholds were slightly elevated at all frequencies (ipsilateral and contralateral) for individuals with blood group O. CONCLUSIONS The results of the study suggest possible reduced outer hair cells in persons with blood group O. This could have resulted in elevated acoustic reflex thresholds.

UI MeSH Term Description Entries
D012022 Reflex, Acoustic Intra-aural contraction of tensor tympani and stapedius in response to sound. Acoustic Reflex
D001789 Blood Group Antigens Sets of cell surface antigens located on BLOOD CELLS. They are usually membrane GLYCOPROTEINS or GLYCOLIPIDS that are antigenically distinguished by their carbohydrate moieties. Blood Group,Blood Group Antigen,Blood Groups,Antigen, Blood Group,Antigens, Blood Group,Group Antigen, Blood,Group, Blood,Groups, Blood
D004424 Ear Canal The narrow passage way that conducts the sound collected by the EAR AURICLE to the TYMPANIC MEMBRANE. Auditory Canal, External,External Acoustic Canal,External Acoustic Meatus,External Auditory Canal,External Ear Canal,Acoustic Canal, External,Acoustic Canals, External,Acoustic Meatus, External,Auditory Canals, External,Canal, Ear,Canal, External Ear,Canals, Ear,Canals, External Ear,Ear Canal, External,Ear Canals,Ear Canals, External,External Acoustic Canals,External Auditory Canals,External Ear Canals
D004432 Ear, Middle The space and structures directly internal to the TYMPANIC MEMBRANE and external to the inner ear (LABYRINTH). Its major components include the AUDITORY OSSICLES and the EUSTACHIAN TUBE that connects the cavity of middle ear (tympanic cavity) to the upper part of the throat. Tympanic Cavity,Tympanum,Middle Ear,Cavities, Tympanic,Cavity, Tympanic,Ears, Middle,Middle Ears,Tympanic Cavities,Tympanums
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000158 Acoustic Impedance Tests Objective tests of middle ear function based on the difficulty (impedance) or ease (admittance) of sound flow through the middle ear. These include static impedance and dynamic impedance (i.e., tympanometry and impedance tests in conjunction with intra-aural muscle reflex elicitation). This term is used also for various components of impedance and admittance (e.g., compliance, conductance, reactance, resistance, susceptance). Audiometry, Impedance,Electroacoustic Impedance Tests,Impedance Tests, Acoustic,Tympanometry,Acoustic Impedance Test,Electroacoustic Impedance Test,Impedance Audiometry,Impedance Test, Acoustic,Impedance Test, Electroacoustic,Impedance Tests, Electroacoustic,Test, Acoustic Impedance,Test, Electroacoustic Impedance,Tests, Acoustic Impedance,Tests, Electroacoustic Impedance
D000161 Acoustic Stimulation Use of sound to elicit a response in the nervous system. Auditory Stimulation,Stimulation, Acoustic,Stimulation, Auditory
D000293 Adolescent A person 13 to 18 years of age. Adolescence,Youth,Adolescents,Adolescents, Female,Adolescents, Male,Teenagers,Teens,Adolescent, Female,Adolescent, Male,Female Adolescent,Female Adolescents,Male Adolescent,Male Adolescents,Teen,Teenager,Youths
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults
D001309 Auditory Threshold The audibility limit of discriminating sound intensity and pitch. Auditory Thresholds,Threshold, Auditory,Thresholds, Auditory

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