Objective:To explore the impact on analgesic efficacy and safety of esketamine as an adductor canal block adjuvant in knee arthroplasty.Methods:The study was a prospective, single center, randomized controlled trial. The subjects were patients who received knee arthroplasty in Zhangjiakou First hospital from October 2021 to October 2023. The patients were randomly divided into trial group and control group using a random number table method. The patients in the both groups received general anesthesia and postoperative patient-controlled intravenous analgesia (PCIA). The patients in the trial group were injected with 0.375% ropivacaine combined with esmketamine, while those in the control group were only injected with 0.375% ropivacaine. The postoperative vital signs, quadriceps femoris muscle strength, resting and dynamic visual analogue scale (VAS) pain score, use of PCIA, and incidence of postoperative adverse reactions in patients between the 2 groups were compared.Results:A total of 120 patients were included in this study, with 60 cases in each group. There were no significant differences in heart rate, mean arterial pressure, respiratory rate, and body temperature in patients between the trial group and the control group at 24 and 48 hours after operation (all P>0.05). There were no significant differences in quadriceps femoris muscle strength at 12, 24 and 48 hours after operation (all P>0.05). At rest, the VAS pain score at 12 hours after operation in the trial group was lower than that in the control group [(2.89±0.49) points vs. (3.36±0.23) points], the difference was statistically significant ( P<0.05). In the active state, the VAS scores at 12 and 24 hours after operation in the trial group were lower than those in the control group [(3.78±0.41) points vs. (4.11±0.45) points, (3.79±0.56) points vs. (4.19±0.69) points], the differences were statistically significant (all P<0.05). The number of times of PCIA compression 24 hours after operation in the experimental group was less than that in the control group [(5.35±1.03) times vs. (7.89±1.34) times], and the difference was statistically significant ( P<0.05), the sensory block time in the experimental group was longer than that in the control group [(488.26±57.75) min vs. (92.26±65.15) min], and the difference was statistically significant ( P<0.05). There were no significant differences in total incidence of adverse reactions including nausea, vomiting, urinary retention, dizziness, drowsiness, delirium and hallucination in patients between the 2 groups within 1 week after operation (all P>0.05). Conclusion:Esketamine as an adjuvant of ropivacaine for adductor block can alleviate the pain level of patients undergoing knee arthroplasty, and it has good safety.

Objective:To explore the impact on analgesic efficacy and safety of esketamine as an adductor canal block adjuvant in knee arthroplasty.Methods:The study was a prospective, single center, randomized controlled trial. The subjects were patients who received knee arthroplasty in Zhangjiakou First hospital from October 2021 to October 2023. The patients were randomly divided into trial group and control group using a random number table method. The patients in the both groups received general anesthesia and postoperative patient-controlled intravenous analgesia (PCIA). The patients in the trial group were injected with 0.375% ropivacaine combined with esmketamine, while those in the control group were only injected with 0.375% ropivacaine. The postoperative vital signs, quadriceps femoris muscle strength, resting and dynamic visual analogue scale (VAS) pain score, use of PCIA, and incidence of postoperative adverse reactions in patients between the 2 groups were compared.Results:A total of 120 patients were included in this study, with 60 cases in each group. There were no significant differences in heart rate, mean arterial pressure, respiratory rate, and body temperature in patients between the trial group and the control group at 24 and 48 hours after operation (all P>0.05). There were no significant differences in quadriceps femoris muscle strength at 12, 24 and 48 hours after operation (all P>0.05). At rest, the VAS pain score at 12 hours after operation in the trial group was lower than that in the control group [(2.89±0.49) points vs. (3.36±0.23) points], the difference was statistically significant ( P<0.05). In the active state, the VAS scores at 12 and 24 hours after operation in the trial group were lower than those in the control group [(3.78±0.41) points vs. (4.11±0.45) points, (3.79±0.56) points vs. (4.19±0.69) points], the differences were statistically significant (all P<0.05). The number of times of PCIA compression 24 hours after operation in the experimental group was less than that in the control group [(5.35±1.03) times vs. (7.89±1.34) times], and the difference was statistically significant ( P<0.05), the sensory block time in the experimental group was longer than that in the control group [(488.26±57.75) min vs. (92.26±65.15) min], and the difference was statistically significant ( P<0.05). There were no significant differences in total incidence of adverse reactions including nausea, vomiting, urinary retention, dizziness, drowsiness, delirium and hallucination in patients between the 2 groups within 1 week after operation (all P>0.05). Conclusion:Esketamine as an adjuvant of ropivacaine for adductor block can alleviate the pain level of patients undergoing knee arthroplasty, and it has good safety.

The adjacent anatomy of the pelvis is complicated, with digestive, urinary, reproductive and other organs as well as important blood vessels and nerves. Therefore, accurate resection of pelvic tumors and precise reconstruction of defects after resection are extremely difficult. The development of medical 3D printing technology provides new ideas for precise resection and personalized reconstruction of pelvic tumors. The “triune” application of 3D printing personalized lesion model, osteotomy guide plate and reconstruction prosthesis in pelvic tumor limb salvage reconstruction treatment has achieved good clinical results. However, the current lack of normative guidance standards such as preparation and application of 3D printing personalized lesion model, osteotomy guide plate and reconstruction prosthesis restricts its promotion and application. The formulation of this consensus provides normative guidance for 3D printing personalized pelvic tumor limb salvage reconstruction treatment.

Objective To investigate the effect of capsule endoscopy on the small intestinal mucosa in the state of air insufflation. Methods Patients undergoing capsule endoscopy from November 2011 to April 2012 were divided into the air insufflation intervention group ( n＝14) and routine examination group (n＝13) by random number table method. The detection rate of small bowel disease, the transit time of capsule endoscope in small intestine, the degree of intestinal cleaning and the degree of intestinal lumen expansion were compared between two groups. Results There was no significant difference in total intestinal examination rate [ 85. 71%( 12/14) VS 61. 54%( 8/13),P＝0. 209] or disease detection rate [ 71. 43%(10/14) VS 84. 62%( 11/13), P＞0. 05] between air insufflation intervention group and conventional examination group. The mean procedure time of the air insufflation intervention group was 270. 86 ± 144. 85 min, which was shorter than that of the conventional examination group (325. 15±161. 76 min, P＝0. 369). The overall cleanliness of the air insufflation intervention group was higher than that of the conventional examination group (2. 05±0. 40 VS 1. 75±0. 40,P＝0. 060). The overall degrees of expansion of small intestine lumen were 1. 79 ± 0. 40 and 1. 38 ± 0. 29 scores, respectively ( P ＝ 0. 004 ). Conclusion Capsule endoscopy can significantly improve the degree of intestinal lumen expansion with trend of improving the overall cleanliness of the small intestine, and shortening the working time of the small intestine.