3.2 MBW test and trial acceptability before implementing real-time
quality control
MBW test acceptability results are summarized in Table 3. In Bern,
before implementing real-time quality control, 89 MBW trials from 31
test occasions were evaluated. After retrospective analysis of quality
control by the reviewer, 68% of test occasions were deemed acceptable.
In terms of MBW trials, 51 (57%) were accepted and 38 (43%) were
rejected following retrospective quality control by the reviewer. The
reasons for trial rejection (details provided in Table 4) included F
grade trials whereby the technical acceptability criteria were not met,
D grade trials with irregular breathing patterns, and good quality
trials (A-C grade) from test occasions without at least two acceptable
trials.
In Zurich, before implementing real-time quality control, 97 MBW trials
from 34 test occasions were evaluated. After retrospective quality
control by the reviewer, only 50% of the test occasions were deemed
acceptable. In terms of MBW trials, 47 (49%) were accepted and 50
(51%) were rejected following retrospective quality control by the
reviewer. The reasons for trial exclusion (details provided in Table 4)
were similar to Bern.