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Correlation of postoperative fluid balance and weight and their impact on outcomes.

ABSTRACT: INTRODUCTION:Normovolemia after major surgery is critical to avoid complications. The aim of the present study was to analyze correlation between fluid balance, weight gain, and postoperative outcomes. METHODS:All consecutive patients undergoing elective or emergency major abdominal surgery needing intermediate care unit (IMC) admission from September 2017 to January 2018 were included. Postoperative fluid balances and daily weight changes were calculated for postoperative days (PODs) 0-3. Risk factors for postoperative complications (30-day Clavien) and prolonged length of IMC and hospital stay were identified through uni- and multinominal logistic regression. RESULTS:One hundred eleven patients were included, of which 55% stayed in IMC beyond POD 1. Overall, 67% experienced any complication, while 30% presented a major complication (Clavien ??III). For the entire cohort, median cumulative fluid balance at the end of PODs 0-1-2-3 was 1850 (IQR 1020-2540) mL, 2890 (IQR 1610-4000) mL, 3890 (IQR 2570-5380) mL, and 4000 (IQR 1890-5760) mL respectively, and median weight gain was 2.2 (IQR 0.3-4.3) kg, 3 (1.5-4.7) kg, and 3.9 (2.5-5.4) kg, respectively. Fluid balance and weight course showed no significant correlation (r?=?0.214, p?=?0.19). Extent of surgery, analyzed through ? albumin and duration of surgery, significantly correlated with POD 2 fluid balances (p?=?0.04, p?=?0.006, respectively), as did POD 3 weight gain (p?=?0.042). Prolonged IMC stay of ??3 days was related to weight gain ??3 kg at POD 2 (OR 2.8, 95% CI 1.01-8.9, p?=?0.049). CONCLUSION:Fluid balance and weight course showed only modest correlation. POD 2 weight may represent an easy and pragmatic tool to optimize fluid management and help to prevent fluid-related postoperative complications.

SUBMITTER: Butti F

PROVIDER: S-EPMC7686193 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature

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Correlation of postoperative fluid balance and weight and their impact on outcomes.

Butti Fabio F Pache Basile B Winiker Michael M Grass Fabian F Demartines Nicolas N Hübner Martin M

Langenbeck's archives of surgery 20201013 8

<h4>Introduction</h4>Normovolemia after major surgery is critical to avoid complications. The aim of the present study was to analyze correlation between fluid balance, weight gain, and postoperative outcomes.<h4>Methods</h4>All consecutive patients undergoing elective or emergency major abdominal surgery needing intermediate care unit (IMC) admission from September 2017 to January 2018 were included. Postoperative fluid balances and daily weight changes were calculated for postoperative days (P ...[more]

PMID: 33047238

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Project description:BACKGROUND:Maintaining adequate hydration is important for overall health and has major implications for athletes involved in physically demanding tasks. While water is viewed as an effective means to rehydrate, and is inexpensive and readily available, electrolyte beverages appear to be more beneficial, in particular for athletes who routinely lose electrolytes through sweating. Nuun tablets contain a mix of electrolytes and are quickly dissolved in water to create an electrolyte-rich beverage. We determined the impact of Nuun tablets on the fluid balance of healthy, exercise-trained men and women at rest. METHODS:Eight men (25.9 ± 4.5 yrs) and 10 women (28.2 ± 9.4 yrs) ingested either water only or water with Nuun electrolyte tablets, at both a single and double strength concentration, in random order, on three separate occasions separated by approximately one week, in a fasted and euhydrated state. A total of 1 liter of fluid was ingested at each visit over a 30 minute period. Urine was collected from each subject at 0, 1, 2, 3, and 4 hours post-ingestion. Urine mass values were used to calculate fluid balance and the beverage hydration index (BHI; i.e., the volume of urine produced after drinking the Nuun beverages, relative to that of water only-control condition). Heart rate and blood pressure were measured throughout the four-hour period, while body weight was measured at the start and end of the experiment. RESULTS:Neither heart rate nor blood pressure were impacted by beverage consumption. Nuun tablets resulted in a lower urine output compared to water, with fluid balances for both concentrations more favorable compared to water (p < 0.05), beginning at 2 h post-ingestion and continuing at the 3 h and 4 h times. Body weight loss was less with Nuun at the single dose (0.38 kg; p = 0.02) and double dose (0.43 kg; p = 0.08), compared to water (0.57 kg). The BHI was higher for Nuun (single dose in particular) compared to water at both 2 h (p = 0.05) and 4 h (p = 0.02). CONCLUSION:The addition of Nuun electrolyte tablets to water improves the fluid balance and BHI in healthy men and women. Results were similar for both concentrations, suggesting that additional electrolytes are not necessary when in a rested state. Future studies should determine the impact of various concentrations of the Nuun beverage during physical exercise-in particular, exercise in the heat, when sweat loss may be highest.

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Correlation of postoperative fluid balance and weight and their impact on outcomes.

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Correlation of postoperative fluid balance and weight and their impact on outcomes.

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