The effect of goal-directed crystalloid versus colloid administration on postoperative spirometry parameters: a substudy of a randomized controlled clinical trial

Table 2 Postoperative variables

Postoperative variables	Crystalloid (n = 31)	Colloid (n =29)	p-value
Postoperative fluid balances
Postoperative intake; ml^a	2800 (1440–3800)	3001(2558–3865)	0.17b
Postoperative output; ml^a	1560 (920–1920)	1410 (1120–1920)	0.86b
1st postoperative day intake; ml	3450 (2760–4225)	3375 (2988–3870)	0.90b
1st postoperative day output; ml	2670 (1768–3118)	2275 (1720–3072)	0.62b
2nd postoperative day intake; ml	3325 (2595–3850)	3340 (2990–3840)	0.67b
2nd postoperative day output; ml	2245 (1610–3612)	2500 (1950–3370)	0.55b
6 h postoperative
Oxygen requirements (yes/no); n	23/8	15/14	0.11c
VAS for pain during rest	4 (3–5)	3 (3–4)	0.22b
VAS for pain during effort	5 (4–7)	5 (4–8)	0.87b
Cumulative PCA requirements; mg^d	15 (7–24)	19 (9–25)	0.55b
24 h postoperative
Oxygen requirements (yes/no); n	12/19	8/21	0.42c
VAS for pain during rest	3 (1–5)	2 (1–3)	0.13b
VAS for pain during effort	5 (3–7)	4 (3–7)	0.22b
Cumulative PCA requirements; mg^d	38 (20–60)	43 (26–59)	0.58b
48 h postoperative
Oxygen requirements (yes/no); n	2/29	2/27	1.00c
VAS for pain during rest	3 (2–4)	2 (0–3)	0.25b
VAS for pain during effort	4 (3–5)	3 (3–6)	0.86b
Cumulative PCA requirements; mg^d	55 (30–73)	48 (36–86)	0.89b

Data are presented as median (IQR) or number. Abbreviations: PCA patient-controlled analgesia, VAS visual analogue scale. ^aPostoperative intake and output represent oral and intravenous fluid intake and urinary output from immediately after surgery until 6 a.m. on the first postoperative morning. ^bWilcoxon rank-sum test. ^cFisher’s exact test. ^dCumulative morphine requirements are presented 6, 24, and 48 h postoperatively

ISSN: 2047-0525