Table 3.
Patient and case characteristics by total fluid administration rate (ml/hr).
| Rate of total fluid administration (ml/hr) | |||||||
|---|---|---|---|---|---|---|---|
| Below Normal Total Fluid Admin Rate | Normal Total Fluid Admin Rate | Above Normal Total Fluid Admin Rate | p-value* | ||||
| (<314 mL/hr) | (314–577 mL/hr) | (>577 mL/hr) | |||||
| (n=124) | (n=530) | (n=123) | |||||
| Age (years) | 49 | (43–57) | 51 | (44–56) | 51 | (45–55) | 0.679 |
| BMI (kg/m2) | 29.5 | (26.1–33.0) | 28.9 | (25.7–32.4) | 29.5 | (26.0–33.9) | 0.172 |
| Diabetes | 9 | 7.30% | 45 | 8.50% | 7 | 5.70% | 0.612 |
| Hypertension | 20 | 16.10% | 116 | 21.90% | 32 | 26% | 0.162 |
| Coronary Artery Disease | 0 | 0% | 2 | 0.40% | 1 | 0.80% | 0.46 |
| Peripheral Artery Disease | 0 | 0% | 1 | 0.20% | 1 | 0.80% | 0.317 |
| Hyperlipidemia | 27 | 21.80% | 108 | 20.40% | 26 | 21.10% | 0.91 |
| Active or Former Smoker | 48 | 38.70% | 184 | 34.70% | 37 | 30.10% | 0.362 |
| Asthma | 12 | 9.70% | 49 | 9.20% | 15 | 12.20% | 0.581 |
| COPD | 0 | 0% | 4 | 0.80% | 1 | 0.80% | 0.827 |
| Obstructive Sleep Apnea | 5 | 4% | 47 | 8.90% | 16 | 13% | 0.039 |
| History of Arrhythmia | 2 | 1.60% | 13 | 2.50% | 5 | 4.10% | 0.481 |
| History of Pain | 27 | 21.80% | 134 | 25.30% | 26 | 21.10% | 0.528 |
| History of Nausea and Vomiting | 40 | 32.30% | 168 | 31.70% | 38 | 30.90% | >0.95 |
| History of Chemotherapy | 47 | 37.90% | 243 | 45.80% | 58 | 47.20% | 0.236 |
| History of Radiation | 44 | 35.50% | 225 | 42.50% | 48 | 39% | 0.339 |
| History of Hormone Therapy | 32 | 25.80% | 167 | 31.50% | 38 | 30.90% | 0.463 |
| ASA physical status | 0.482 | ||||||
| 1 or 2 | 71 | 57.30% | 281 | 53% | 61 | 49.60% | |
| 3 or 4 | 53 | 42.70% | 249 | 47% | 62 | 50.40% | |
| Procedure Timing | 0.557 | ||||||
| Immediate | 77 | 62.10% | 313 | 59.10% | 68 | 55.30% | |
| Delayed | 47 | 37.90% | 217 | 40.90% | 55 | 44.70% | |
| Laterality | 0.451 | ||||||
| Bilateral | 55 | 44.40% | 229 | 43.20% | 46 | 37.40% | |
| Unilateral | 69 | 55.60% | 301 | 56.80% | 77 | 62.60% | |
| Flap Type | 0.053 | ||||||
| pTRAM flap | 17 | 13.70% | 81 | 15.30% | 25 | 20.30% | |
| msTRAM flap | 23 | 18.50% | 159 | 30% | 28 | 22.80% | |
| DIEP flap | 76 | 61.30% | 252 | 47.50% | 64 | 52% | |
| Other | 8 | 6.50% | 38 | 7.20% | 6 | 4.90% | |
| Preoperative MAP | 90.5 | (83.3–97.3) | 91.7 | (85.0–99.0) | 90.7 | (81.3–97.3) | 0.199 |
| Preoperative Hematocrit (%) | 38.9 | (36.6–41.0) | 38.5 | (36.6–40.3) | 38.2 | (36.2–39.5) | 0.124 |
| Preoperative Creatinine (mg/dL) | 0.8 | (0.70–0.80) | 0.8 | (0.70–0.80) | 0.7 | (0.60–0.80) | 0.022 |
Continuous data are expressed as median (range). Categorical data, expressed as n (percents). BMI = body mass index. COPD = chronic obstructive pulmonary disease. ASA = American Society of Anesthesiologists physical status. pTRAM = pedicled transverse rectus abdominis myocutaneous. msTRAM = muscle-sparing transverse rectus abdominis myocutaneous. DIEP = deep inferior epigastric perforator.
*
p value calculated with Kruskal Wallis (continuous) or Fisher’s Exact test (categorical)