A randomized controlled trial to compare the effect of oxycodone and sufentanil on postoperative analgesia and immune function for laparoscopic resection of colorectal cancer.

Compared to pre injection, NK cells showed a decreasing trend at 0.5-, 6-, 12-, and 24-h after using oxycodone, but the rate of decrease was slower than that of the morphine group [ 15 ].

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Firstly, the data of our study is relatively small, and the variability of the data may be significant, making it impossible to statistically evaluate the significance of the experimental results.

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