[Retracted] Study on the Effect of Different Doses of Hydromorphone on the Time Response and Postoperative Analgesia of Ropivacaine in Ultrasound-Guided Suprailiac Fascia Inguinal Block

Figure 3

The Ramsay scores at 12 h, 24 h, 36 h, and 48 h after operation among the three groups. Note: compared with the L group, .

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