Outcome
Type |
Measure |
Description |
Time frame |
Safety issue |
Primary |
Post-sitting sympathetic nervous activity |
Natural-log transformed low frequency power of heart rate variability calculated using R wave to R wave intervals obtained for 5 minutes between 10 and 15 minutes after the sitting position following interscalene brachial plexus block |
15 minutes after the sitting position following interscalene brachial plexus block |
|
Secondary |
Post-sitting ipsilateral pupil diameter |
Ipsilateral pupil diameter measured under a mesopic condition 15 minutes after the sitting position following interscalene brachial plexus block |
15 minutes after the sitting position following interscalene brachial plexus block |
|
Secondary |
Post-sitting contralateral pupil diameter |
Contralateral pupil diameter measured under a mesopic condition 15 minutes after the sitting position following interscalene brachial plexus block |
15 minutes after the sitting position following interscalene brachial plexus block |
|
Secondary |
Post-anesthetic ipsilateral pupil diameter |
Ipsilateral pupil diameter measured under a mesopic condition 30 minutes after interscalene brachial plexus block |
30 minutes after interscalene brachial plexus block |
|
Secondary |
Post-anesthetic contralateral pupil diameter |
Contralateral pupil diameter measured under a mesopic condition 30 minutes after interscalene brachial plexus block |
30 minutes after interscalene brachial plexus block |
|
Secondary |
Pre-anesthetic ipsilateral pupil diameter |
Ipsilateral pupil diameter measured under a mesopic condition 15 minutes after baseline acclimation |
15 minutes after baseline acclimation |
|
Secondary |
Pre-anesthetic contralateral pupil diameter |
Contralateral pupil diameter measured under a mesopic condition 15 minutes after baseline acclimation |
15 minutes after baseline acclimation |
|
Secondary |
Post-sitting parasympathetic nervous activity |
Natural-log transformed high frequency power of heart rate variability calculated using R wave to R wave intervals obtained for 5 minutes between 10 and 15 minutes after the sitting position following interscalene brachial plexus block |
15 minutes after the sitting position following interscalene brachial plexus block |
|
Secondary |
Post-sitting sympathovagal balance |
Low-to-high frequency power ratio of heart rate variability obtained for 5 minutes between 10 and 15 minutes after the sitting position following interscalene brachial plexus block |
15 minutes after the sitting position following interscalene brachial plexus block |
|
Secondary |
Post-sitting overall variability of autonomic nervous system |
Natural-log transformed total power of heart rate variability obtained for 5 minutes between 10 and 15 minutes after the sitting position following interscalene brachial plexus block |
15 minutes after the sitting position following interscalene brachial plexus block |
|
Secondary |
Post-anesthetic sympathetic nervous activity |
Natural-log transformed low frequency power of heart rate variability between 25 and 30 minutes after interscalene brachial plexus block |
Between 25 and 30 minutes after interscalene brachial plexus block |
|
Secondary |
Post-anesthetic parasympathetic nervous activity |
Natural-log transformed high frequency power of heart rate variability between 25 and 30 minutes after interscalene brachial plexus block |
Between 25 and 30 minutes after interscalene brachial plexus block |
|
Secondary |
Post-anesthetic sympathovagal balance |
Low-to-high frequency power ratio of heart rate variability between 25 and 30 minutes after interscalene brachial plexus block |
Between 25 and 30 minutes after interscalene brachial plexus block |
|
Secondary |
Post-anesthetic overall variability of autonomic nervous system |
Natural-log transformed total power of heart rate variability between 25 and 30 minutes after interscalene brachial plexus block |
Between 25 and 30 minutes after interscalene brachial plexus block |
|
Secondary |
Pre-anesthetic sympathetic nervous activity |
Natural-log transformed low frequency power of heart rate variability 15 minutes after baseline acclimation |
15 minutes after baseline acclimiation |
|
Secondary |
Pre-anesthetic parasympathetic nervous activity |
Natural-log transformed high frequency power of heart rate variability 15 minutes after baseline acclimation |
15 minutes after baseline acclimiation |
|
Secondary |
Pre-anesthetic sympathovagal balance |
Low-to-high frequency power ratio of heart rate variability 15 minutes after baseline acclimation |
15 minutes after baseline acclimiation |
|
Secondary |
Pre-anesthetic overall variability of autonomic nervous system |
Natural-log transformed total power of heart rate variability 15 minutes after baseline acclimation |
15 minutes after baseline acclimation |
|
Secondary |
Sensory blockade |
C5 to T1 dermatomal blockade of the shoulder graded from 0 to 2 (0 = no cold sensation, 1 = reduced cold sensation, and 2 = normal cold sensation) by applying ice to the shoulder |
30 minutes after interscalene brachial plexus block |
|
Secondary |
Motor blockade |
Motor blockade of the radial, ulnar, median, musculocutaneous, and axillary nerves graded from 0 to 2 (0 = no block 1 = partial block, and 2 = complete block) |
30 minutes after interscalene brachial plexus block |
|