Table 1.
Patient characteristics
| MD (n=33) | LD (n=31) | P-value | |
|---|---|---|---|
|
| |||
| Age (years), mean (range) | 74 (65–89) | 74 (65–86) | NS |
|
| |||
| Sex (M/F), n/n | 10/23 | 12/19 | NS |
|
| |||
| BMI (kg/m2), mean (range) | 26.6 (19.4–35.6) | 26.1 (20.0–33.5) | NS |
|
| |||
| ASA (I/II/III), n/n/n | 4/24/8 | 4/22/5 | NS |
|
| |||
| Type of surgery, n | |||
| Orthopedic | 27 | 26 | |
| Vascular | 3 | 1 | |
| General | 3 | 4 | |
|
| |||
| Sensory level, mean (range) | Th9 (Th4–Th12) | Th9 (Th6–L1) | NS |
|
| |||
| Blood loss (mL), mean (range) | 222 (30–600) | 218 (20–500) | NS |
|
| |||
| Time in recovery room (min), mean (range) | 94 (30–180) | 81 (30–180) | NS |
|
| |||
| Ephedrine (mg), mean (range) | 7.8 (0–40) | 4.7 (0–15) | NS |
|
| |||
| Ephedrine, n (%) | 19 (57.6%) | 13 (41.9%) | NS |
|
| |||
| Rescue medication, n | 3 | 0 | NS |
Note: Data are expressed as mean and range unless otherwise stated.
Abbreviations: ASA, American Society of Anaesthesiologists; BMI, body mass index; LD, low dose; MD, medium dose; NS, not significant.