Prevention of pressure ulcers through simultaneous measurement of pressure, temperature and blood flow. Background Pressure ulcers arise because of ischaemia in the skin, which is mostly created because of high external pressure. Ischaemia leads to destruction of the cells because of low blood flow, resulting in low oxygen and nutrition supply to the cells, and insufficient transport of waste products away from the cells. Ischaemia is developed when high pressure, shear and high temperature exists, because of their influence on the blood flow through the pelvic region. Shear means that different layers are displaced in relation to each other, this leads to the destruction of vessels and therefore a decrease of the necessary blood flow. Secondary factors for developing of pressure ulcers are exposure time, moisture, lack of nourishment and bad hygiene. Today the hospitals and their buying department have a large and hazardous work when it comes to choose which type of mattresses that will be bought. Every deliver claims that their mattress has the best pressure relieving principle and accumulate the least heat. There are not any standardized measurement methods for evaluating mattresses or compare them. In this project we will measure pressure, temperature and moisture between the patient and mattress and also the blood flow in the tissue. By doing this we should be able to comment on which mattress might be the best one for decreasing the risk of developing pressure ulcers. We also hope to decrease the medical careâ€™s cost for treatment of pressure ulcers and most important, minimize the pain and suffering for the patient. Shear and friction contribute to that the skin and bones are displaced from each other, this leads to damage in the tissue in between, like the blood vessels.
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Temperatureffekter vid användandet av blodflödesprob med ppg och ldf (Oct 2012) Jimmie Hagblad, Mia Folke, Maria Lindén Medicinteknikdagarna 2012 Programbok
Long term monitoring of blood flow at multiple depths observations of changes (Jun 2012) Jimmie Hagblad, Mia Folke, Maria Lindén PHealth 2012: Proceedings of the 9th International Conference on Wearable Micro and Nano Technologies for Personalized Health
Technical issues related to the long-term monitoring of blood flow at different depths using LDF and PPG (May 2012) Jimmie Hagblad, Mia Folke, Lars-Göran Lindberg , Maria Lindén Physiological Measurement
Interference free monitoring of blood flow at multiple depths (Oct 2010) Jimmie Hagblad, Mia Folke, Lars-Göran Lindberg , Maria Lindén
A technique based on laser Doppler flowmetry and photoplethysmography for simultaneously monitoring blood flow at different tissue depths (May 2010) Jimmie Hagblad, Lars-Göran Lindberg , Annika Kaisdotter Andersson (Jonsson), Sara Bergstrand , Margareta Lindgren , Anna-Christina Ek , Mia Folke, Maria Lindén Medical and Biological Engineering and Computing