Abstract:Objective To investigate the clinical efficacy of combined nutrition in colorectal cancer patients undergoing surgery. Methods Patients were divided randomly into enternal nutrition group (EN), parenternal nutrition (PN) group and combination of EN and PN (EN+PN) group. Prognostic indexes including albumin, transferrin, prealbumin, clinical indexes including gastrointestinal functional recovery time, average hospital stay, average cost,immune index including percentage of CD3+, CD4+, CD8+ positive T cells, CD4+/CD8+ ratio, serum immunoglobulin IgA, IgG, IgM, and the fatigue index of the immune system were recorded. Result Patients in EN+PN group had increased levels ofPA, TF and ALB while experienced decreased time of hospital stay, cost, duration of time before first exsufflation and cacation, and incidence of adverse events significantly when compared with EN group or PN group (P < 0.05). Patients in EN+PN group experienced upregulated levels of CD3+, CD4+ and CD4+/CD8+ positive T cells and enhanced serum IgG, IgA and IgM along with decreased fatigue index when compared with that in EN or PN only group (P < 0.05). Conclusions Combination of internal and parenternal nutritional support is beneficial for the restoration of immune and intestinal function, reduces infectious complications and improves the fatigue index of patients.