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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

En jämförande studie av två metoder för analys av tårfilmen : En pilotstudie

Edström, Ola, Gerebo, Linnéa January 2024 (has links)
Syfte: Syftet med studien var att jämföra två metoder vid undersökning av tårfilmsanalys; tårflödesbeteende-metoden och fluorescein break-up mönster och om deras mätresultat överensstämmer med varandra. Detta för att diskutera om någon av metoderna kunde vara ett bättre alternativ att adaptera ute i praktiken för vårdgivare inom ögonvården. Metod: Initialt fick deltagarna besvara en OSDI-enkät (ocular surface disease index), därefter gjordes resterande mätningar i biomikroskopet. I biomikroskopet utfördes initialt dem icke-invasiva mätningarna som tillhörde tårflödesbeteende-metoden (mätning av TMH (tårmeniskhöjd), debrishastighet efter blinkning och mätning av lipidlagrets interferensmönster) även NiBUT (non-invasive tear break-up time) utfördes. Efter dem icke-invasiva mätningarna tillsattes fluorescein i inferiora temporala fornix och dem invasiva testerna; TBUT (tear break-up time) och FBUP (fluorescein break-up mönster) utfördes tre gånger. Alla mätningar dokumenterades med video. Tre oberoende bedömningar utfördes. Studien undersökte om resultatet av tårflödesbeteendet och FBUP hade ett samband och vilken utav metoderna som fick en högre intravaliditet utefter dem bedömningar som utfördes. Resultat: Totalt deltog 26 deltagare varav 4 exkluderades. Deltagarna var mellan 19–57 år gamla med en genomsnittsålder på 35 år och en standardavvikelse på ±12,3 år. Samtliga presenterade med en OSDI ≥13, alternativt hade en visuellt frekvent blinkfrekvens. Det återfanns ett samband mellan tårflödesbeteende-metoden och FBUP i studien, dock ingen av klinisk signifikans ((bedömare 1, Cramer’s V= 0,46 p=0,06) (bedömare 2, Cramer’s V=0,33 p=0,32) (bedömare 3, Cramer’s V=0,33 p=0,34)). Tårflödesbeteende-metoden (Fleiss kappa =0,29, p=0,40) och FBUP (Fleiss kappa =0,25, p=0,40) uppvisade båda på en mindre god intra-validitet Slutsats: Det finns ett samband mellan tårflödesbeteende-metoden och FBUP men ingen statistisk signifikans. Intravaliditeten är marginellt högre vid tårflödesbeteende-metoden än vid FBUP i studien. / Aim: The aim of this study was to compare two methods used during tear-film analysis; tear-flow behaviour, and fluorescein break-up pattern and if their measured results are in an agreement. This in order to discuss which one of the methods would be more suitable to apply in clinical practice for healthcare workers in the field of optometry.  Method: Initially the participants filled out an OSDI questionnaire (ocular surface disease index), thereafter measurements were done in the biomicroscope. Initially the non-invasive measurements such as the tear-flow behaviour method (measurements of TMH (tear meniscus height), speed of debris movement across the tear film after blinking and measurements of the lipid layer interference) and NiBUT (non-invasive break-up time) were measured. Afterwards fluorescein was applied in the inferior temporal fornix and the invasive measurements; TBUT (tear break-up time) and FBUP (fluorescein break-up pattern) were measured three times. All measurements done in the biomicroscope were documented with video and three independent assessments were done. This study looked at the results from the tear-flow behaviour and FBUP and if they agreed with one another. It also looked into which one of the methods presented a higher intra-validity in regard to the assessments made. Results: The study had a total of 26 participants, of which 4 were excluded. The participants were between the ages of 19-57 years old with an average age of 35 years with a standard deviation of ±12,3 years. The participants presented with an OSDI of ≥13, with exceptions made if a participant visually had a high blink frequency. A correspondence between the tear-flow behaviour method and  FBUP could be observed, however none of statistical significance ((assessor 1, Cramer’s V= 0,46 p=0,06) (assessor 2, Cramer’s V=0,33 p=0,32) (assessor 3, Cramer’s V=0,33 p=0,34)). The intra-validity of the tear-flow behaviour method (Fleiss kappa =0,29, p=0,40) and FBUP (Fleiss kappa =0,25, p=0,40) were both categorized as weak intra-validity.  Conclusion: There is a correspondence between the tear-flow method and FBUP, without statistical significance. The intra-validity was marginally higher within the tear-flow method compared to FBUP in the study.

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