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Estudo das alterações da temperatura da face em resposta a um estímulo doloroso
| Name: | Description: | Size: | Format: | |
|---|---|---|---|---|
| PG_12135 | 563.11 KB | Adobe PDF |
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Abstract(s)
Introdução: A dor é uma experiência subjectiva e pessoal sendo por isso difícil o seu estudo. A indução de estímulos nocivos experimentalmente tem sido referido como a forma mais segura e precisa de estudar os mecanismos da dor. O estímulo da dor provocado pelo cold pressor test (CPT), através da imersão em água fria da mão, é considerado um método fiável e válido, reportando quem a ele é sujeito, como mimetizar devidamente um estímulo doloroso. Objectivo: Pretende-se com o presente estudo verificar a resposta termográfica da face perante o estímulo do (CPT), explorando o processamento da dor ao observar se existe alteração de temperatura, distalmente ao estímulo doloroso, como resposta do sistema nervoso autónomo, através da sua intervenção na capacidade de termorregulação. Metodologia: Nove indivíduos com uma média de idades de 30,91±2,02 anos, foram avaliados por termografia antes e depois do CPT. Cada participante foi avaliado num único dia. As imagens térmicas foram obtidas utilizando uma câmara termográfica (FLIR A325). Foi utilizado software ThermaCAM Researcher Pro 2.10 para recolha e posterior tratamento das imagens térmicas. Os participantes foram sujeitos a um período de aclimatização de 15 minutos, sendo as imagens obtidas através do plano frontal da face, antes e depois do (CPT). Foram tidos em conta os valores obtidos da temperatura do nariz, mandibula e maxila. A intensidade da dor pela imersão em água fria da mão foi quantificada através da escala numérica de dor. Resultados: A temperatura das zonas em avaliação aumentou na maioria das áreas avaliadas, sendo este aumento significativo na zona da maxila e mandibula, lado não dominante e na mandibula lado dominante (p≤0.05). As diferenças da temperatura da pele sugerem a intervenção do sistema nervoso autónomo, provocado pelo CPT. Conclusão: A termografia da face revelou ser útil no estudo da dor, sugerindo a actividade do sistema nervoso autónomo, através do registo da alteração de temperatura e o estímulo induzido pelo CPT.
Introduction: Pain is a hard to study, unpleasant and subjective experience. Inducing noxious stimuli has been referred as one of the most accurate and safe way to study pain mechanisms. Cold pressor pain, induced by the submergence of the hand in cold water, is said to mimic the effect of the unpleasant feeling reported by the subjects. Objective: The aim of this study is verify the thermographic response of the face to the CPT stimulus, exploring the pain processing by observing if there is a temperature alteration, distal to the pain stimulus, as a response of the autonomic nervous system, through its intervention in the thermoregulation capacity.. Methodology: Nine subjects with average age of 30,91±2,02 years were evaluated by thermal imaging before and after a CPT. Each participant was evaluated a single day in which two skin temperature measurements were performed. Thermal images were obtained using a camera (FLIR A325). The software ThermaCAM Researcher Pro 2.10 was used to obtain and process the thermal images. After a 15 minute acclimatization period the thermograms were obtained from the anterior view of the face before and after the CPT. The temperature values that were considered, were those attained from the nose, the mandible and maxilla. The intensity of pain induced by submerging the hand in cold water was evaluated by a numeric rating scale. Results: Skin temperature increased in most of the analyzed regions of interest and the increase was significant in the non-dominant maxilla and mandible and in the dominant mandible (p≤0.05). Skin temperature changes suggest an arousal of the autonomic nervous system induced by the CPT. Conclusion: Thermal imaging of the face proved useful in pain research, allowing to estimate autonomic activity. The CPT induced facial skin temperature changes.
Introduction: Pain is a hard to study, unpleasant and subjective experience. Inducing noxious stimuli has been referred as one of the most accurate and safe way to study pain mechanisms. Cold pressor pain, induced by the submergence of the hand in cold water, is said to mimic the effect of the unpleasant feeling reported by the subjects. Objective: The aim of this study is verify the thermographic response of the face to the CPT stimulus, exploring the pain processing by observing if there is a temperature alteration, distal to the pain stimulus, as a response of the autonomic nervous system, through its intervention in the thermoregulation capacity.. Methodology: Nine subjects with average age of 30,91±2,02 years were evaluated by thermal imaging before and after a CPT. Each participant was evaluated a single day in which two skin temperature measurements were performed. Thermal images were obtained using a camera (FLIR A325). The software ThermaCAM Researcher Pro 2.10 was used to obtain and process the thermal images. After a 15 minute acclimatization period the thermograms were obtained from the anterior view of the face before and after the CPT. The temperature values that were considered, were those attained from the nose, the mandible and maxilla. The intensity of pain induced by submerging the hand in cold water was evaluated by a numeric rating scale. Results: Skin temperature increased in most of the analyzed regions of interest and the increase was significant in the non-dominant maxilla and mandible and in the dominant mandible (p≤0.05). Skin temperature changes suggest an arousal of the autonomic nervous system induced by the CPT. Conclusion: Thermal imaging of the face proved useful in pain research, allowing to estimate autonomic activity. The CPT induced facial skin temperature changes.
Description
Projeto de Graduação apresentado à Universidade Fernando Pessoa como parte dos requisitos para obtenção do grau de Licenciado em Fisioterapia
Keywords
Dor Termografia Cold pressor test Sistema nervoso autónomo Pain Thermography Cold pressor test Autonomic nervous system