Effects of intraoperative nutrients administration on energy expenditure during general anesthesia

Prognosis for major abdominal surgeries based on intraoperative low-dose nutrition: A metabolic perspective

BACKGROUND & AIMS

The optimal nutrition intake during surgery is unknown. This study aimed to investigate the prognosis of low-dose nutrition during laparoscopic colorectal cancer surgery.

METHODS

In the glucose and amino acids (GA) group, 20 patients were infused with glucose (75 g/L) and amino acids (30 g/L) at 60 mL/h and bicarbonate Ringer's solution. However, 20 patients in the control (C) group were infused with bicarbonate Ringer's solution without GA. The length of hospital stay was determined, and measurements were taken before (TI) and after (T2) the surgery under general anesthesia.

RESULTS

The lengths of hospital stay were comparable between the GA (13 days) and C (16 days) groups. Ketone body levels were 294 (C group) and 33 (GA group) μmol/L at T2. Nitrogen balance was 0.32 g (GA group) and -1.60 g (C group) at T2.

CONCLUSIONS

Although the lengths of hospital stay were comparable, ketone body levels, and nitrogen balance were significantly different (P < 0.01) between the two groups after surgery.

Energy Expenditure in Upper Gastrointestinal Cancers: a Scoping Review

Malnutrition is prevalent in people with upper gastrointestinal (GI) cancers and is associated with shorter survival and poor quality of life. In order to effectively prevent or treat malnutrition, nutrition interventions must ensure appropriate energy provision to meet daily metabolic demands. In practice, the energy needs of people with cancer are frequently estimated from predictive equations which are not cancer-specific and are demonstrated to be inaccurate in this population. The purpose of this scoping review was to synthesize the existing evidence regarding energy expenditure in people with upper GI cancer. Three databases (Ovid MEDLINE, Embase via Ovid, CINAHL plus) were systematically searched to identify studies reporting on resting energy expenditure using indirect calorimetry and total energy expenditure using doubly labeled water (DLW) in adults with any stage of upper GI cancer at any point from diagnosis. A total of 57 original research studies involving 2,125 individuals with cancer of the esophagus, stomach, pancreas, biliary tract, or liver were eligible for inclusion. All studies used indirect calorimetry, and one study used DLW to measure energy expenditure, which was reported unadjusted in 42 studies, adjusted for body weight in 32 studies, and adjusted for fat-free mass in 13 studies. Energy expenditure in upper GI cancer was compared with noncancer controls in 19 studies and measured compared with predicted energy expenditure reported in 31 studies. There was heterogeneity in study design and in reporting of important clinical characteristics between studies. There was also substantial variation in energy expenditure between studies and within and between cancer types. Given this heterogeneity and known inaccuracies of predictive equations in patients with cancer, energy expenditure should be measured in practice wherever feasible. Additional research in cohorts defined by cancer type, stage, and treatment is needed to further characterize energy expenditure in upper GI cancer.