Orientador: Carlos Alberto Hussni / Resumo: As enfermidades podais do membro torácico são a maior causa das alterações musculoesqueléticas que acometem os equinos. A doença do navicular, osteíte podal e a laminite estão entre as enfermidades de maior incidência em equinos, sendo todas elas citadas como afecções de origem vascular. A fotopletismografia é um método diagnóstico não invasivo que quantifica o tempo de reenchimento venoso baseado na circulação periférica terminal. Objetivou-se estudar a exequibilidade e viabilidade da fotopletismografia podal em equinos, padronizando os valores normais para a espécie. Foram utilizados 10 equinos hígidos, avaliando-se os membros torácicos em diferentes superfícies, sendo dividos em dois grupos: Grupo Borracha (GB) e Grupo Concreto (GC). A fotopletismografia foi realizada com os animais em posição quadrupedal, realizando-se movimentos pendulares para mimetizar movimentos de apoio e elevação do membro, realizando-se cinco movimentos consecutivos e então, imediatamente induzidos ao repouso, obtendo-se então, o tempo de reenchimento venoso (TRV). Não houve diferença significativa entre o membro torácico direito e membro torácico esquerdo nos diferentes grupos (p=0,75). A média do TRV nos equinos do grupo borracha (GB) foi de 12,650 ± 1,694 e no grupo concreto (GC) foi de 12,700 ± 1,387 segundos, não demonstrando diferença significativa entre os diferentes pisos (p=0,98). Os equinos apresentaram valores de referência significativos em relação aos pacientes humanos. Conclui-se que ... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: The thoracic limb disorders are the major cause of the musculoskeletal changes affecting the horses. Navicular disease, foot osteitis and laminitis are among the diseases of higher incidence in equines, all of which are cited as affections of vascular origin. Photoplethysmography is a noninvasive diagnostic method that quantifies venous refill time based on the terminal peripheral circulation. The objective is study the feasibility of foot photoplethysmography in horses, standardizing the normal values for this species. Thoracic limbs were used on different surfaces and divided into two groups: Rubber Group (RG) and Concrete Group (CG). The photoplethysmography was performed with the animals in a quadrupedal position, with pendular movements being performed to mimic support and elevation movements. Five consecutive movements were performed, and then immediately induced at rest, and venous refilling time (VRT). There was no significant difference between the right and left thoracic limbs in the different groups (p=0.75). The mean TRV in the horses of the rubber group (GB) was 12.650 ± 1.694 and the concrete group (CG) it was 12.700 ± 1.387 seconds, showing no significant difference between the different floors (p=0.98). The reference values in horses are different in relation to human patients. It can be concluded that the photoplethysmography of the thoracic limbs in horses can be used as an auxiliary method to evaluate the microcirculation of the foot, the reference value fo... (Complete abstract click electronic access below) / Doutor

<p>The aim of the work was to investigate the possibility to combine information from PPG and bio-acoustic technology to extract information that is related to the blood pressure. The measurements have been carried out with several different configurations. First the relation between arterial sounds and the PPG-signal was studied. After those measurements with both PPG and the bio- acoustic technique was concluded on people in different positions and after riding a bike. The goal was to vary the blood pressure. The conclusion that can be drawn in this report is that the bio-acoustic and the PPG-signal in peripheral arteries have the same source. That implies that arterial sounds are a product of turbulence when the pulse wave passes by. Further it can be assumed that it is the first heart sound that is represented in the arterial sounds. The time before and after the arterial sound in one heart cycle vary whit the blood pressure. There relationship seems also to vary with the bloodpressure but it vary differently under different conditions.</p>

The aim of the work was to investigate the possibility to combine information from PPG and bio-acoustic technology to extract information that is related to the blood pressure. The measurements have been carried out with several different configurations. First the relation between arterial sounds and the PPG-signal was studied. After those measurements with both PPG and the bio- acoustic technique was concluded on people in different positions and after riding a bike. The goal was to vary the blood pressure. The conclusion that can be drawn in this report is that the bio-acoustic and the PPG-signal in peripheral arteries have the same source. That implies that arterial sounds are a product of turbulence when the pulse wave passes by. Further it can be assumed that it is the first heart sound that is represented in the arterial sounds. The time before and after the arterial sound in one heart cycle vary whit the blood pressure. There relationship seems also to vary with the bloodpressure but it vary differently under different conditions.

This thesis describes the design of the illumination LED module for contactless measurement of basic physiological parameters. Contactless methods is based on the fotopletysmografických methods. The acquisition parameters used video camera for monitoring body part of the patient. Designed lighting LED module is used to enhance the optical signal with respect to quantum efficiency of the camera used. The acquired video sequences are then programmatically processed, analyzed, and the result is an estimate of the measured parameter.