BACKGROUND Congenital and acquired hearing loss considered as the most common disability. According to the WHO report, 360 million people worldwide have disabling hearing loss, and 32 million of these are children. Severe to profound sensorineural hearing loss can be treated successfully with cochlear implants. Post implant Auditory Verbal Therapy/ Hearing Implant Rehabilitation is essential for the progress and better outcome. Multidisciplinary team approach, including ENT, audiologist, speech therapy, social worker, coordinator, caregiver /parent is required. The first clinical speech therapy department in Mongolia was established by the School of Dentistry, MNUMS based at the Maxillofacial Surgery Department of the MCNHC in 2006 (G. Ariuntuul, B. Bulgan, U. Azzaya). Where as the very first Cochlear Implanted child in Mongolia was received the surgery and audiology support by A. Ulziibayar, L. Byambasuren, B. Misheel, B. Narantya and the hearing implant rehabilitation treatment successfully conducted by the abovementioned speech team in 2009. Aim: To analyze current situation on speech therapy intervention for patients with hearing loss and deafness. METHODS Retrospective hospital data were collected based on the School of Dentistry, Speech therapy department between January, 2009- February, 2017. In total 70 patients’ information were retrieved for the study. Descriptive method is used for statistical analysis. RESULTS Out of 70 patients, attended speech therapy sessions 38 (54%) were males, 32 (46%) were females; where as 21 (30%) had congenital deafness and 28 (40%) acquired; 21 (30%) patients with hearing loss not known their causes of deafness. From the total of 28 (100%) cases with acquired hearing loss/deafness 11 (39%) patients cause of deafness is due to complication from infectios disease: meningitis.

The main goal of this study is to examine the development of auditory perception performances of a cochlear implanted child who receive auditory verbal therapy. Present study included a child with prelinguistic hearing loss who received cochlear implant at the Department of ENT, 1st State Central Hospital and enrolled in Auditory Verbal Therapy (AVT) in the Speech Therapy Unit of “ Aid” Clinic. This hearing impaired child participated in auditory verbal therapy with their mother and/or father for 5 months, and the family was given training programs to apply at home after each therapy session. The auditory perception performances of a child were evaluated before implantation and after: twice every week in total 32 Audio-Verval Therapy sessions were performed with the help of Medel LittlEars Auditory Questionnaire, LIP (Listening Process Profile), Ling’s Five Sound Test, the Multiple Frequency Animal Sound Test (mFAST) and MTP (Monosyllable and Polysyllable Test). The auditory perception performances of a child joining auditory verbal therapy programs increased after 5 months of implantation. According to the Ling’s test all 5 sounds are determined (20-60dB) in 1m distance, but discrimination is observed in frequency range between 40-60 dB for sounds “A”, “U” and “M”. Parents active participation as well as full attendance in the AVT treatment shows progress in auditory development of a child. Furthermore evaluation and data analysis is needed.

This study investigates cochlear implant surgical and Audio Verbal Therapy (AVT) practice patterns of patients with hearing loss (HL) based on data of “Aid” ENT Clinic and Speech Therapy Unit of School of Dentistry, Mongolian National University of Medical Sciences (MNUMS) between 2009-2018. Our aim was to describe and collect related data on surgical interventions, using cochlear implant for patients with severe hearing loss and their involvement in the AVT sessions. Hospital based registry data by audiologistwere retrospectively investigated. Descriptive statistics are used to describe the basic features of the data in the study. In total 78 patients had cochlear implantation surgery with chronological age between 2 months and 55 years. From total subjects 46 (54.59%) were male and 32 (33.41%) female. The distribution of etiology for the hearing loss showed that the majority of hearing loss 47 (60%) had due to infectious diseases, other diseases or injury, 25 (32%) congenital and 6 (8%) unknown causes. Documentation and proper registration is essential for better outcome of cochlear implantation surgery, especially teamwork of speech therapist doing AVT and audiologist in charge of fitting. Furthermore, epidemiological studies are important for evaluation and monitoring of interventions by every specialists included in the treatment team.