Sleeping Accidents in the Elderly

Continued Dangers From Bed Pole Mobility Devices

ABSTRACT

Bed poles are held in place by a frame that is inserted underneath a bed mattress and are designed to assist in moving an incumbent from a lying to an upright sitting position, or to help with turning, repositioning, or transferring. Two cases demonstrate, however, that lethal entrapment may be caused by such devices-a 76-year-old man and an 84-year-old woman were both found beside their beds hanging by their necks from bed poles. Gaps between bed poles and mattress/bed sides may provide potentially lethal confined spaces. Individuals at particular risk of such an event are elderly with limited strength and/or obesity with an incomplete awareness of environmental dangers and have a history of mobility issues and/or falls. Any railing used to assist with movement to and from, or within, a bed must sit flush with the bed/mattress side to minimize any chances of entrapment.

The relationship between positional asphyxia and increasing body mass index

Review of the files of the Pathology section of Forensic Science SA over 17 yrs (January 2003-December 2019) revealed 32 adult cases of positional asphyxia (age range 18-87 years; average 49 years - m:f ratio 3:1). Predisposing/causative conditions were accidents, N = 8, alcohol intoxication N = 7, neurological disease N = 7, drug intoxication N = 5, morbid obesity N = 2, combinations of factors N = 2, and a single homicide N = 1. There was one case with below normal weight (BMI 17.9), with 6 cases having normal weights (BMI range 18.9-24.6, average 22.3), 9 being overweight (BMI range 25.3-29.5, average 27.9), and 16 being obese (BMI range 30-66.2, average 40.9). Only 7 cases (22%) had either under/normal weight compared to 25 (78%) who were overweight/obese (p < 0.05). Increasing body mass appears to be a risk factor to be considered in all forms of positional asphyxia; BMI should, therefore, be routinely taken into account in the forensic evaluation of such cases.

Age-Related Vulnerability to Lethal Craniocerebral Crush Injuries from Electrical Beds/Tables

Vulnerability to accidents characterizes the extremes of life for reasons that may be similar in each age group. Two cases are reported to demonstrate increased risks of entrapment and crushing injury involving the use of electrically controlled beds/tables. Case 1: A frail 98-year-old woman with a history of dementia suffered a lethal crush injury to her head when she fell out of bed and accidentally activated its lowering mechanism. Case 2: An 18-month-old girl suffered a lethal crush injury to her head when she became trapped under a lowered electric massage table. Common devices may be dangerous if individuals do not have the mental or physical capabilities to deal with them. The forensic assessment of such deaths involves an evaluation of the neurocognitive level and physical strength of the decedent as documented in previous clinical assessments, in addition to a careful examination of the structure and function of the bed/table.