According to the present disclosure, an apparatus (132) is provided for determining the potential for entrapment of a patient in a gap (54) defined in a bed (10). The apparatus (132) includes a simulated body part (142, 144) configured to simulated a body part of a person. During an entrapment test, a user attempts to position the simulated body part (142, 144) in the gap (54) defined by the bed (10) to determine the entrapment potential of the gap (54).