Zone 2 = This is the space between the lower edge of the railing and a mattress compressed by the weight of the patient's head in a location between a support or the various rail supports.
If there is only one rail support, entrapment may occur anywhere along the lower length of the rail beyond the support, to the end of the rail.
The factors to consider are the compressibility of the mattress that can change over time due to wear, lateral displacement of the mattress or rail, and any degree of play of loose rails or rail supports.
A restless Patient can enlarge the space by compressing the mattress beyond what is specified. This space can also change with different positions of height of the rail and when the headboard or footboard of the bed is raised or lowered.
Space can increase, decrease, be less accessible or disappear altogether. In some positions, the potential for entrapment in this area may still exist when the bed frame is articulated.
Preventing the head from entering below the railing will prevent the neck from being trapped in this space. The measurement of this space must be below 120 mm.
Review of the bed rails:
Check the space between the lower edge of the railing and a mattress compressed with a 120 mm diameter test piece.
Adapt bed rails & mattresses that do not meet this criterion, to avoid accidents.