Background: Pressure injuries are said to be nosocomial when they occur after twenty-four (24) hours on admission. Prevention of pressure injuries in high-risk patients such as those with spinal cord injury, the unconscious, and those with femoral neck fracture is essential. The static air-mattress is one of the pressure relieving devices used to prevent pressure injury in low resource countries. However, some patients develop pressure injuries despite being nursed on the air-mattress. The inflation pressure of the static air-mattress is usually not measured, thus is unknown. Therefore, the air-mattress may be over-inflated or under-inflated and ineffective in the prevention of pressure injury.