Medicine
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This repository contains the published and unpublished research of the Faculty of Medicine by the staff members of the faculty
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Item When No Speech Norms Exist: Observations From Sinhala(American Speech-Language-Hearing Association, 2024-11) Hettiarachchi, S.; Ranaweera, M.; Saleem, S.; Krishnaveni, K.PURPOSE A well-established set of language-specific norms for phonological development is imperative in the assessment of child speech sound difficulties. Currently, English norms are used clinically (in the absence of norms for local languages) to determine if a child displays age-appropriate, delayed or disordered speech patterns in Sinhala. This preliminary exploratory study aimed to document phonological processes observed in typically developing Sinhala-speaking children aged 3;0-6;11 (years;months).METHOD The Test of Articulation and Phonology-Sinhala, a picture-based assessment, was devised by the researchers and administered to 102 Sinhala-speaking children from three geographical locations (Colombo, Kandy, and Gampaha). The quantitative measures included percent consonants correct, percent vowels correct, and percent phonemes correct, while the qualitative analysis identified phonological processes.RESULTS The quantitative results showed a marked influence of age on phoneme production accuracy with over 75% consonants correct by 3 years 6 months. The qualitative findings demonstrate common typical phonological processes and less common phonological processes in Sinhala compared to the speech pathology and cross-linguistic literature. Common phonological processes included fronting, stopping, and weak syllable deletion widely documented in linguistic and speech-language pathology literature. Many shared phonological processes were observed between Sinhala and Sri Lankan Tamil, the two main local languages, including fronting of retroflex sounds and lateralization. The phonological process of denasalization of prenasalized stops was observed in Sinhala, with no documentation of the phonological process found within the mainstream speech-language pathology literature.CONCLUSION AND IMPLICATIONS: These findings reinforce the need to document and use language-specific typical phonological processes in Sinhala given the implications for early and accurate identification of speech difficulties and intervention.Item Investigating Parkinson's disease with dual high resolution pharyngeal manometry with impedance and videofluoroscopy(Blackwell Publishing, 2024) Saleem, S.; Miles, A.; Allen, J.PURPOSE: To characterize pharyngeal function in people with Parkinson's Disease using both high resolution impedance manometry (HRIM) and videofluoroscopy (VFSS) and to explore correlations between VFSS and HRIM metrics. METHODS: All participants received both VFSS and HRIM within 24 h-time window. A standard VFSS protocol (IDDSI 0: 1 mL, 3 mL, 20 mL, and 100 mL) was performed. A solid-state unidirectional catheter (36 pressure sensors) was used to acquire manometric data for triplicate swallows (IDDSI 0: 5 mL, 10 mL, 20 mL), quantitative swallow analysis was completed through Swallowtail™ and SwallowGateway™. Parameters were compared to published norms and statistical tests explored correlational associations (p < 0.05). RESULTS: Twenty-one participants (76% male; mean age 70 years, SD7.16) with mild-moderate severity PD were recruited with 73% reporting Eating Assessment Tool (EAT-10) scores ≥3 indicating swallow impairment. Compared to normal metrics, one third of participants had abnormally elevated hypopharyngeal contractile integral (HPCI), hypopharyngeal peak pressure, upper esophageal sphincter (UES) integrated relaxation pressure (UES IRP), and reduced UES maximum admittance. Five participants showed compromised swallow safety (Penetration-Aspiration Scale score ≥6). One third of participants had abnormal VFSS values for pharyngoesophageal segment (PES) opening duration, maximum PES opening distance, and maximum hyoid displacement measures. Some HRIM metrics had a strong correlation with pharyngeal VFSS measures (r > 0.60, p < 0.05). CONCLUSION: This study identifies early manometric signs of pharyngeal dysfunction in people with PD. The congruence of the VFSS and HRIM measures confirms the hypothesis of insidious early decline in swallow function in PD despite maintenance of airway safety (i.e., low aspiration rates).Item Enabling access: A pilot study on access and use of assistive products in the Northern Province, Sri Lanka(VU e-Publishing, Netherlands, 2019) Hettiarachchi, S.; Subramaniam, V.; Rajah, E.; Nizar, S.; Saleem, S.PURPOSE: The need for suitable assistive technology is growing all over the world, not only for people with disabilities but also for the ageing population with functional decline and non-communicable diseases. Access to assistive technology promotes access to education, employment and active societal participation. The aim of this study was to assess the self-reported need by persons with disabilities and by people who were 65 years and older without disabilities in the Northern Province of Sri Lanka, for assistive products; and to identify barriers to accessing these assistive products. METHOD: This mixed-methods pilot study included 76 participants who were either persons with disabilities or their caregiver or persons 65 years and older, from the Northern Province of Sri Lanka, affected by the now-ended 30-year civil war. To ascertain trends in the local need for assistive products, a translated version of the World Health Organisation's Priority Assistive Products List of 50 items was used. In addition, semi-structured interviews with key participants were conducted, to gain some insights into the barriers to accessing assistive products. RESULTS: The most widely used assistive products among persons with disabilities were connected to war-related injuries. In contrast, those used by the older age group of persons without disabilities were connected to non-communicable diseases and age-related frailty. The assistive products requested by both groups were aids to promote independence in daily activities and to support access to education and employment. The emergent themes included affordability, employment, independence in activities of daily living, stigma and psychological impact, and a lack of awareness and guidance in the use of assistive devices. CONCLUSION: The findings highlight the need for policies and practices to be informed by local socio-cultural, historical and geographical realities. KEYWORDS: Assistive products, Global South, Sri Lanka, war, priorities the Assistive Products List, VersionItem Typical phonemic and phonological development of three year old Sri Lankan Tamil – speaking children in the Colombo district(Faculty of Graduate Studies, University of Kelaniya, 2014) Saleem, S.; Hettiarachchi, S.Item Views of Teachers, Caregivers and Children with Cerebral Palsy on the Understanding and Use of Augmentative and Alternative Communication Systems in Sri Lanka(Faculty of Medicine, University of Kelaniya, 2014) Saleem, S.; Bandara, M.M.M.K.; Subajini, A.A.N.; Udugama, K.L.L.G.; Dharmaratne, I.; Kitnasamy, G.; Hettiarachchi, S.Every child’s and adult’s right to communicate is a basic human right, promoted by the Disability Rights Movement. However, the use of Augmentative and Alternative Communication (AAC) modes remains ambiguous, possibly dependent on socio-cultural and economic factors influencing the understanding of and access to AAC devices. The findings from a UK-based project (2013) stressed the need to provide AAC training and learning provision to all stakeholders. The aim of this study was to uncover the current understanding of and use of AAC among 30 teachers, 30 caregivers and 10 children with cerebral palsy. Qualitative and quantitative data were gathered via a survey and open-ended interviews with the AAC users encouraged to use available communication devices and artwork. Although a majority of special education teachers had heard of AAC systems, mainly of Bliss symbols, in contrast to Mainstream teachers, overall, there was a propensity towards favoring oral communication. There was a limited understanding of the concept of AAC and a persons’ right to use alternative and augmentative communication modes by a majority of teachers and caregivers. The use of AAC systems is very limited, based on the awareness and access to a speech therapist and if used, mainly limited to the speech therapy sessions in the school. The child participants favored the BigMac switches and the attention-seeking bells on low-tech AAC devices where available. While the younger children used the communication charts during speech therapy sessions, the older children were less enthusiastic about using low-tech communication boards and books.Item Developing and validating a Sinhala phonology assessment for children aged between 3 to 6 years: trends observed and lessons learnt(Faculty of Medicine, University of Kelaniya, 2014) Nonis, P.D.M.; Ranaweera, M.; Saleem, S.; Udugama, K.L.L.G.; Lokubalasuriya, T.; Hettiarachchi, S.Clinical experience of speech and language therapists working in Sri Lanka has put into question the current reliance on norms for English (Grunwell, 1985) to determine a child’s speech skills and phonological acquisition in Sinhala. Cross-linguistic studies have revealed differences in ‘universal principles’ and ‘language-specific’ aspects (Amayreh & Dyson, 1998). At present, there is an urgent need to develop and validate formal language-specific standardized assessments for speech and phonology for Sinhala. The aims of the study were; 1)to develop and validate test items for a Sinhala speech and phonology assessment for children aged between 3;0 to 6;0 years, 2)to document the typical phoneme acquisition and typical phonological processes in Sinhala-speaking children aged between 3;0 to 6;0 years. The ‘Sinhala Speech and Phonology Assessment’ was devised based on the Diagnostic Evaluation of Articulation and Phonology (Dodd et al. 2002) and administered to 250 Sinhala-speaking children between the ages 3;0 to 6;00 years. The use of test items were determined by measures of content validity, test-retest reliability and inter-rater reliability. The trajectory of Sinhala speech sound acquisition showed universal sound acquisition sequences and language-specific features in both the order and rate of speech sound development. The sequence of speech sound acquisition for Sinhala showed early acquisition of plosives and some nasals with comparatively later acquisition of fricatives, the palatal nasal and flap/tap sound. Language-specific phonological processes of lateralization and denasalisation of prenasalised stops were also evident. The test items demonstrated effectiveness at generating target speech data and typical phoneme and phonological development in children between 3;0 to 6;0.