MBchB study guide

Apr 25th, 2015
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PRESSURE ULCERSAlso decubitus, from the Latin decumbere, means "to lie down." Thus describes ulcers due to prolonged lying on bed not other types of pressure ulcers. FrequencyAt any given time, 3-10% of hospitalized persons have pressure sores and 2.7% develop new pressurePressure sores also occur with a higher frequency in neurologically impaired young patients. Immobility and lack of sensation make these patients susceptible to developing pressure soresPathophysiology1. The primary pathophysiological event is chronic pressure on skin over a bony prominence. Tissue ischaemia follows, producing areas of necrosis with ulceration that are susceptible to infection.Friction and prolonged contact with urine or faeces are additional predisposing factors. These pressures often are in excess of capillary filling pressure, approximately 32 mm Hg. Tissues are capable of withstanding en

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