Letter to the editor regarding “Effects of S-ketamine added to patient-controlled analgesia on early postoperative pain and recovery in patients undergoing thoracoscopic lung surgery: A randomized double-blinded controlled trial”

• Published in: Journal of clinical anesthesia 2024-06, Vol.94, p.111421-111421, Article 111421
• Main Authors: Xue, Fu-Shan, Cheng, Yi, Yuan, Yu-Jing
• Format: Article
• Language: English
• Subjects: Analgesia, Patient-Controlled; Analgesics; Analgesics - therapeutic use; Analgesics, Opioid; Double-Blind Method; Humans; Ketamine; Ketamine - adverse effects; Lung; Multimodal analgesia; Pain; Pain, Postoperative - drug therapy; Pain, Postoperative - etiology; Pain, Postoperative - prevention & control; Patients; Postoperative analgesia; Quality of recovery; S-ketamine; Thoracic surgery; Thoracoscopic surgery; Writing
• ISSN: 0952-8180; 1873-4529
• DOI: 10.1016/j.jclinane.2024.111421

According to the doses of PCIA hydromorphone and the number of PCIA boluses provided in the supplementary table of Zhang et al.'s article [1], we found that not all of 150-mL PCIA fluid containing different-dose S-ketamine were administered to patients within 48 h postoperatively, especially for S-ketamine 1 and 2 mg/kg/48 h groups. [...]according to the description of fig. 2 in Zhang et al’ article [1], the frames A and B showed the postoperative resting and active pain scores in the control and combined S-ketamine groups. [...]in addition to the PCIA with hydromorphone, postoperative analgesic strategy of control group during the study period included the multi-level single-shot intercostal nerve block, scheduled dosing of IV ketorolac and rescue use of IV oxycodone as needed.