En kvalitativ utvärdering av det accelerometerbaserade hältdetektionssystemet "Lameness Locator"
Background: Evaluation of lameness in horses is traditionally performed by a veterinarian who subjectively evaluates the movements of the horse. Accordingly, lameness diagnosis varies with the veterinarian and circumstances for which the horse is examined. Research within the area has long tried to...
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| Formato: | L3 |
| Lenguaje: | sueco Inglés |
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SLU/Dept. of Biomedical Sciences and Veterinary Public Health (until 231231)
2009
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| Materias: |
| _version_ | 1855572032739082240 |
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| author | Suneson, Ebba |
| author_browse | Suneson, Ebba |
| author_facet | Suneson, Ebba |
| author_sort | Suneson, Ebba |
| collection | Epsilon Archive for Student Projects |
| description | Background: Evaluation of lameness in horses is traditionally performed by a veterinarian who subjectively evaluates the movements of the horse. Accordingly, lameness diagnosis varies with the veterinarian and circumstances for which the horse is examined. Research within the area has long tried to establish an objective and standardized method for lamenessevaluation in horses. Several methods have been shown to be reliable and are used regularly within research, for example measurement of forces between the hoof and ground, and measurement of movements with high speed cameras or accelerometers. However these methods require considerable preparation, standardization, and expensive equipment as well as produce large amounts of data that are incomprehensible for the clinician. Consequently, up until now the implementation of objective lameness methodologies to a normal clinical setting has been prohibited.
A simplified accelerometersystem with associated software for userfriendly results has been developed at University of Missouri, USA. The system comprizes two accelerometers and one gyrometer that sends data to a portable computer. The data analysed is then presented as a summary of asymmetries arising from the head or pelvis and which limb that can be connected to that asymmetry. It also measures magnitude and significance of the assymetries.
Purpose: To evaluate "Lameness Locator´s" usefulness in clinical situations, on horses in everyday work and in high speed during swedish conditions and to identify sources of error that can influence the user´s diagnosis
Procedure: The system was evaluated during three situations
Data were collected from a horse, equipped with sensors, that was evaluated for lameness including lounging, flexion tests and diagnostic blocks. The result was compared with the assessing veterinarian.
Another horse was evaluated in a field study during work at a trotting track and again, data were collected during the entire investigation. This was also an occasion to test the system's ability to detect lameness at high speed.
A third experiment concentrated on evaluating the system's ability to detect asymmetries at high speed in trotters. Three horses, fully fit for competition, were driven at high speed and movement disturbances were provoked by a weight attached to the hoofwall.
Results and discussion: Lameness Locator´s results correlated well to the ongoing lameness-evaluation. For both horses horses that came into the clinic the results according to the system was the same as for the veterinarian´s evaluation.
In the experiment with weight-induced asymmetries, the participating horses turned out to be initially lame which influenced the result. In two of the three horses the lameness was exaggerated by weighting the lame limb.
"Lameness Locator" could detect lamenesses irrespective of footing or speed. Even compensatory movements are detected and presented within the system, which requires knowledge about this in order to correctly evaluate the results. |
| format | L3 |
| id | RepoSLU12272 |
| institution | Swedish University of Agricultural Sciences |
| language | swe Inglés |
| publishDate | 2009 |
| publishDateSort | 2009 |
| publisher | SLU/Dept. of Biomedical Sciences and Veterinary Public Health (until 231231) |
| publisherStr | SLU/Dept. of Biomedical Sciences and Veterinary Public Health (until 231231) |
| record_format | eprints |
| spelling | RepoSLU122722017-11-01T09:44:27Z En kvalitativ utvärdering av det accelerometerbaserade hältdetektionssystemet "Lameness Locator" Suneson, Ebba häst rörelsestörningar hälta rörelsemekanik Background: Evaluation of lameness in horses is traditionally performed by a veterinarian who subjectively evaluates the movements of the horse. Accordingly, lameness diagnosis varies with the veterinarian and circumstances for which the horse is examined. Research within the area has long tried to establish an objective and standardized method for lamenessevaluation in horses. Several methods have been shown to be reliable and are used regularly within research, for example measurement of forces between the hoof and ground, and measurement of movements with high speed cameras or accelerometers. However these methods require considerable preparation, standardization, and expensive equipment as well as produce large amounts of data that are incomprehensible for the clinician. Consequently, up until now the implementation of objective lameness methodologies to a normal clinical setting has been prohibited. A simplified accelerometersystem with associated software for userfriendly results has been developed at University of Missouri, USA. The system comprizes two accelerometers and one gyrometer that sends data to a portable computer. The data analysed is then presented as a summary of asymmetries arising from the head or pelvis and which limb that can be connected to that asymmetry. It also measures magnitude and significance of the assymetries. Purpose: To evaluate "Lameness Locator´s" usefulness in clinical situations, on horses in everyday work and in high speed during swedish conditions and to identify sources of error that can influence the user´s diagnosis Procedure: The system was evaluated during three situations Data were collected from a horse, equipped with sensors, that was evaluated for lameness including lounging, flexion tests and diagnostic blocks. The result was compared with the assessing veterinarian. Another horse was evaluated in a field study during work at a trotting track and again, data were collected during the entire investigation. This was also an occasion to test the system's ability to detect lameness at high speed. A third experiment concentrated on evaluating the system's ability to detect asymmetries at high speed in trotters. Three horses, fully fit for competition, were driven at high speed and movement disturbances were provoked by a weight attached to the hoofwall. Results and discussion: Lameness Locator´s results correlated well to the ongoing lameness-evaluation. For both horses horses that came into the clinic the results according to the system was the same as for the veterinarian´s evaluation. In the experiment with weight-induced asymmetries, the participating horses turned out to be initially lame which influenced the result. In two of the three horses the lameness was exaggerated by weighting the lame limb. "Lameness Locator" could detect lamenesses irrespective of footing or speed. Even compensatory movements are detected and presented within the system, which requires knowledge about this in order to correctly evaluate the results. Bakgrund: Utvärdering av rörelsestörningar hos häst görs traditionellt genom att en veterinär subjektivt bedömer hästens rörelser, vilket ger utrymme för stora skillnader i diagnostiken. Forskning inom området har länge försökt fastställa en objektiv och standardiserad metod för att utvärdera hältor hos häst. Flera metoder har visat sig fungera och används regelbundet inom forskningen, t.ex. mätning av hovens belastning mot underlaget (ground reaction forces), registrering av rörelser med hjälp av höghastighetskamera och accelerometerbaserad teknik. Dock har ingen av metoderna blivit tillgängliga för kliniskt bruk eftersom de ofta kräver lång förberedelsetid, är tekniskt avancerade, är begränsade till utvärdering på rullmatta, och sist men inte minst ger de stora mängder svårbegriplig data. Ett förenklat accelerometersystem, med tillhörande mjukvara, för användarvänliga resultat har under senare tid utvecklats på University of Missouri, USA (Keegan et al. 2004). Systemet består av två accelerometrar och en gyrometer som trådlöst sänder data till en bärbar datorenhet som snabbt analyserar asymmetrier härrörande från huvud eller bäcken och presenterar resultatet som en sammanfattning av var i stegfasen, d.v.s. under vilket bens belastning, som de eventuella asymmetrierna uppstår samt dess storlek och signifikans. Syfte: Att utvärdera ”Lameness Locator´s” användbarhet i kliniska situationer, på hästar i vardagligt arbete och i hög hastighet under svenska förhållanden samt att identifiera felkällor som kan påverka användarens diagnostik. Genomförande: Lameness Locator utvärderades på tre sätt: En häst utrustades med sensorer och data samlades parallellt med ordinarie hältutredning, där både longering, böjprov och diagnostiska anestesier lades, och resultatet kunde hela tiden jämföras med veterinärens subjektiva bedömning. En annan häst hältutreddes i fält och även här samlades data under hela utredningen. Parallellt med veterinärens bedömningar av hästen för hand samlades även data när hästen arbetade framför sulky på travbana för att jämföra systemets resultat i hög och låg hastighet. Ett tredje försök inriktade sig på att utvärdera systemets förmåga att detektera asymmetrier i höga hastigheter hos travhästar. Travhästar i tävlingskondition kördes i hög hastighet och man försökte provocera fram rörelsestörningar genom att fästa vikter till hovarna. Resultat och diskussion: "Lameness Locator´s" resultat korrelerade väl med den parallella hältutredningen. Båda de ingående hästarna visade samma problem enligt systemet som enligt veterinären och utredningens utveckling kunde följas genom diagnostiska anestesier till dess att patienterna bedömdes som ohalta av båda källor. I försöket med viktinducerade asymmetrier visade det sig att de ingående fösökshästarna var initialt halta vilket påverkade resultatet. Den slutsats som kunde dras var att hälta på ett initialt halt bakben blir värre om man fäster en vikt till det. Detta uppvisades med signifikans hos 2 hästar av 3. Genomgående för alla försök visade systemet god förmåga att detektera rörelseavvikelser oavsett underlag eller hastighet. Även kompensatoriska rörelseförändringar uppfattas och presenteras av systemet, vilket kräver kunskap om detta hos användaren för att korrekt utvärdera resultatet. SLU/Dept. of Biomedical Sciences and Veterinary Public Health (until 231231) 2009 L3 swe eng https://stud.epsilon.slu.se/12272/ |
| spellingShingle | häst rörelsestörningar hälta rörelsemekanik Suneson, Ebba En kvalitativ utvärdering av det accelerometerbaserade hältdetektionssystemet "Lameness Locator" |
| title | En kvalitativ utvärdering av det accelerometerbaserade hältdetektionssystemet "Lameness Locator" |
| title_full | En kvalitativ utvärdering av det accelerometerbaserade hältdetektionssystemet "Lameness Locator" |
| title_fullStr | En kvalitativ utvärdering av det accelerometerbaserade hältdetektionssystemet "Lameness Locator" |
| title_full_unstemmed | En kvalitativ utvärdering av det accelerometerbaserade hältdetektionssystemet "Lameness Locator" |
| title_short | En kvalitativ utvärdering av det accelerometerbaserade hältdetektionssystemet "Lameness Locator" |
| title_sort | en kvalitativ utvärdering av det accelerometerbaserade hältdetektionssystemet "lameness locator" |
| topic | häst rörelsestörningar hälta rörelsemekanik |