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. 2020 May 11;40(5):BSR20193410. doi: 10.1042/BSR20193410

Figure 3. The cumulative PCA sufentanil requirements and PCA frequency.

Figure 3

Cumulative intravenous sufentanil consumption (μg) delivered by PCA (A) and the PCA frequency (B) during a 48 h postoperative period in patients receiving dexmedetomidine or saline. Values are expressed as means (95% CI); *P <0.05, **P <0.01.