Type of bed
Figure 5 • Fishbone diagram—causes of injuries.
; TABLE 1. Research Variables.
Figure 6 • Measure cassette insertion force.
the patient, one inch above the shoulder,
prior to lifting.
The objective of the research was to
find the combination of variables that
would minimize the amount of effort
required to lift the patient, insert the cassette, remove the cassette, and reposition
the patient. Simultaneously, we wanted to
find ways to make the portable x-ray experience more comfortable for the patient.
Forces required to insert and remove the
cassette were measured with a strain gage
as shown in Figure 6. The technologist was
also asked to rate the amount of perceived
effort required to lift the patient using
a scale patterned after the Borg RPE scale
for perceived exertion. 2 One of the team
members assumed the role of the patient
during the experiment. After each experimental round, the “patient” was asked to
rate the degree of discomfort associated
with the iteration.
Eight iterations of the experiment
were conducted testing the combinations
shown in Table 2. Figure 7 shows the
results for each iteration in terms of the
measured forces to insert and remove the
cassette, the perceived effort to lift the
patient, and the perceived level of discomfort for the patient. Of the eight
combinations studied, iteration four
yielded the best combination from the
perspective of both the patient and the