Related theory

The bed is an important piece of hospital equipment used by patients to rest, although there is currently a drive to reduce the amount of time patients unnecessarily stay in bed (Oliver [169]).
Hospital beds are generally composed of a metal frame (some are divided into three sections to assist with positioning) and set on castors or wheels to aid mobility. Hospital beds have become more sophisticated. Many have electrical or battery‐powered motors that are operated via a control panel attached to the bed; these can help to alter the patient's position or alter the height of the bed. This assists nurses by reducing the strain of altering a patient's position, and it assists patients by giving them some autonomy in altering their own position independently (Ghersi et al. [74]). Common bed positions are highlighted in Table 9.3 and shown in Figure 9.2.
Table 9.3  Common bed positions
Supine/flatMattress flat and parallel to the floor
  • Generally adopted position for sleeping patients
  • For patients who are hypotensive
  • For patients in cervical traction due to vertebral injuries
Fowler's position
Head of the bed raised to 45° or more; the end of the bed may be raised at the knee to stop the patient sliding down the bed
  • Positioning for procedures such as nasogastric tube insertion and nasotracheal suctioning
  • Position to assist with eating
Semi‐Fowler's positionHead of bed raised, but to a lesser degree than the Fowler's position
  • Reduces risk of aspiration and regurgitation
  • Promotes lung expansion
TrendelenburgMattress in the level position, entire bed tilted with the head of the bed down and feet elevated
  • Positioning for procedures such as central venous catheter removal to assist in increase of intra‐abdominal pressure
  • Improves venous return
  • For postural draining
Source: Spencer ([217]).
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Figure 9.2  Bed positions.
Standard healthcare mattresses are usually constructed of supportive foam with a waterproof lining to aid with cleaning (Spencer [217]). There are a number of more sophisticated mattresses available that use variable air pressures; these can offer pressure relief to patients who are at risk of developing pressure damage while in bed for extended periods.