Dermatology Physiotherapy Pressure Sore

Definition and Causes of Pressure Sore

In this article we will discuss the Definition and Causes of Pressure Sore

In this article, we will discuss the Definition and Causes of Pressure Sore. So, let’s get started.


Normal capillary pressure is 32 mmHg at arteriole end and 15 mmHg at venule end. Any pressure greater than this cause capillary obstruction and ischemia leading to increased permeability of capillary and extravasation of the materials ultimately leading to development of pressure sore. Pressure more of than 40-100 mmHg over a period of 4 hours capable of producing cellular ischemia and sore.


Following causes may lead to development of pressure sore:

  • Loss of mobility/immobilzation
  • Desensitised skin
  • ANS dysfunction
  • Metabolic disturbance
  • Nutritional deficiency
  • Loss of bowel and bladder control or urinary/bowel incontinence
  • Muscle spasm
  • Emotional depression
  • External risk factors such as friction, moisture, infection
  • Neurological disorders
  • Obesity/geriatric patients

3 replies on “Definition and Causes of Pressure Sore”

As the skin is a very important part of our body, because it is a very sensitive organ to it due to the countless pain and temperature receptors, your information in this regard is extremely important. Interesting and informative your article.
Manuel (Chile)

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