Table 1.
Baseline, anaesthetic, and surgical characteristics. Data are presented as mean (standard deviation), median (inter-quartile range [range]), or absolute number (%). ACPS, anaesthetist-controlled propofol sedation; PMPS, patient-maintained propofol sedation.
|
ACPS (n=40) |
PMPS (n=40) |
P-value |
|
| Age (yr) | 71.5 [52–90] | 72.5 [51–89] | — |
| Sex (n) | |||
| Male | 16 (40) | 16 (40) | — |
| Female | 24 (60) | 24 (60) | |
| Total body weight (kg) | 80.9 (15.0) | 79.1 (16.0) | — |
| Lean body mass (kg) | 54.2 (10.0) | 52.5 (10.4) | — |
| Height (cm) | 166 (9) | 163 (10) | — |
| BMI (kg m−2) | 29.3 (4.0) | 29.6 (4.4) | — |
| ASA physical status (n) | |||
| 1 | 1 (2.5) | 1 (2.5) | — |
| 2 | 27 (67.5) | 26 (65.0) | |
| 3 | 11 (27.5) | 13 (32.5) | |
| 4 | 1 (2.5) | 0 | |
| Previous experience of medical or surgical procedures (n) | |||
| General anaesthesia | 36 (90.0) | 32 (80.0) | — |
| Sedation | 23 (57.5) | 22 (55.0) | |
| Awake | 21 (52.5) | 15 (37.5) | |
| Patient-led sedation | 1 (2.5) | 0 | |
| Quality of life (EQ-5D-5L index) |
0.799 (0.149) |
0.695 (0.203) |
— |
|
ACPS (n=40) |
PMPS (n=38) |
P-value |
|
| Midazolam before spinal anaesthesia (n) | 20 (50) | 9 (23) | 0.013 |
| Dose (mg) | 1.5 (0.5) | 1.4 (0.5) | 0.656 |
| Spinal hyperbaric bupivacaine (mg) | 14 (13–15 [12–20]) | 14 (13–15 [10–18.75]) | 0.347 |
| Spinal diamorphine (n) | 10 (25.0) | 12 (31.5) | 0.617 |
| Dose (μg) | 0 (0–300 [300–500]) | 0 (0–300 [300–500]) | 0.638 |
| Time taken to perform spinal (min) | 1 (1–3 [0–25]) | 1 (0–3 [0–32]) | 0.904 |
| Dermatomal spinal block height | T8 (T8–T10 [T5–T10]) | T9 (T6–T10 [T5–T10]) | 0.826 |
| Duration of sedation (min) | 73 (22) | 78 (17) | 0.259 |
| Duration of surgery (min) | 59 (18) | 63 (16) | 0.297 |
| Arthroplasty performed (n) | |||
| Hip | 12 (30.0) | 17 (44.7) | 0.242 |
| Knee | 28 (70.0) | 21 (55.2) | |