Objective To evaluate the influence of routine lateral release to the clinical outcomes after total knee arthroplasty without patellar resurfacing.Methods The study involved all patients divided into two groups using a randomised group method.During total knee arthroplasty(TKA),forty-three patients were treated with lateral release in the treatment group,while Forty-two patients in the control group were not treated with lateral release.Both groups were assessed for anterior knee pain,patient satisfaction,Knee Surgery Society(KSS)score,KSS function score,patella score,and incidence of postoperative complications.Results After 24 months of follow-up,the treatment group was found to have a lower incidence of anterior knee pain compared to the control group(P<0.05),and there were no statistically significant differences in postoperative satisfaction,complication rate,KSS knee score,KSS function score,and patella score between the two groups(P>0.05).Conclusion The study suggests that routine lateral release can reduce anterior knee pain and does not increase the risk of postoperative complications after total knee arthroplasty without patellar resurfacing.

Objective:To compare the short-term efficacy of laparoscopic sleeve gastrectomy (LSG) combined with sharp His angle reconstruction (LSG-His) versus traditional LSG.Methods:In this retrospective cohort study we collected clinical data of patients with obesity who had undergone LSG or LSG-His in the Department of General Surgery, Beijing Chaoyang Hospital, Capital Medical University, from January to June 2022. After excluding patients with incomplete follow-up data and those with hiatal hernia, 83 obese patients, of which 39 who had undergone LSG (LSG group) and 44 who had undergone LSG-His (LSG-His group), were included in the study. The basic steps in LSG-His are the same as in conventional LSG. After continuous suturing of the gastric staple line, one stitch is placed between the proximal side of the gastric greater curvature staple line and the proximal side of the gastric fundus posterior wall with the left diaphragm, and another stitch between the right side of the gastric fundus and the esophagus, reconstructing the sharp His angle. Clinical data, postoperative complications, and follow-up data on weight loss and gastroesophageal reflux disease (GERD) symptoms 1-, 3-, 6-, and 12-months post-discharge were compared between the two groups. GERD symptoms were assessed using the Gastroesophageal Reflux Disease Questionnaire and Reflux Diagnostic Questionnaire.Results:There were no significant differences between the two groups in baseline characteristics, length of hospital stay, hospitalization costs, intraoperative bleeding, postoperative nausea and vomiting, dysphagia, or postoperative complications (all P>0.05). Compared with the LSG group, the LSG-His group had significantly longer operative times (92 [80, 100] minutes vs. 80 [70, 100] minutes, U=2.227, P=0.026), higher postoperative 24-hour pain scores (5.2±1.8 vs. 4.3±1.9, t=-2.065, P=0.041), and higher rates of morphine use (70.5% [31/44] vs. 46.2% [18/39], χ2=4.519, P=0.025). The incidence of new-onset GERD 12 months postoperatively was significantly lower in the LSG-His than the LSG group (10.7% [3/28] vs. 61.3% [19/31], χ2=14.00, P<0.001). According to changes in Gastroesophageal Reflux Disease Questionnaire and Reflux Diagnostic Questionnaire scores, the LSG-His group also had significantly lower rates of exacerbation of GERD (2/16 vs. 5/8, χ2=4.27, P=0.021) and higher rates of GERD remission (12/16 vs. 2/8, χ2=3.62, P=0.032) than did the LSG group. Additionally, excess weight loss rates were significantly higher in the LSG-His group at 3 months [(54.7± 18.7)% vs. (46.5±15.0)% , t=-2.166, P=0.033], 6 months [(73.8±24.7)% vs. (64.0±19.1)% , t=-2.018, P=0.047], and 12 months [(82.9±26.7)% vs. (72.2±19.3)%, t=-2.063, P=0.042] than in the LSG group. Conclusion:Compared with LSG, LSG-His is safe and feasible and achieves better short-term control of postoperative GERD and more effective weight loss. Further large-scale, long-term, prospective studies are needed to confirm the long-term efficacy of LSG-His.

Objective To explore the morphological characteristics of overlapping bloodstains and judge the deposition sequence of bloodstain patterns.Methods The overlapping bloodstains formed by drip stains and bloody shoe prints were simulated on ceramic tiles,and the morphological characteristic differences of 6 group overlapping bloodstain patterns were analyzed to screen effective indicative characteristics.A survey was held to measure the accuracy of the participants in judging the blood deposition sequence without and with information about the morphological characteristic guidance.Results After participants mastered morphological characteristics,the accuracy of judging deposition sequence increased from 59.5%to 89.0%,and the accuracy of judging dry and wet conditions of the primary bloodstains increased from 45.6%to 65.3%.Conclusion According to the morphological characteristics of bloodstains,not only the deposition sequence of bloodstains can be effectively judged,but also the dry and wet conditions of bloodstains can be judged,so as to infer the time interval of bloodstains deposition,which can provide technical support for the analysis and reconstruction of crime scene.

Objective:To compare the short-term efficacy of laparoscopic sleeve gastrectomy (LSG) combined with sharp His angle reconstruction (LSG-His) versus traditional LSG.Methods:In this retrospective cohort study we collected clinical data of patients with obesity who had undergone LSG or LSG-His in the Department of General Surgery, Beijing Chaoyang Hospital, Capital Medical University, from January to June 2022. After excluding patients with incomplete follow-up data and those with hiatal hernia, 83 obese patients, of which 39 who had undergone LSG (LSG group) and 44 who had undergone LSG-His (LSG-His group), were included in the study. The basic steps in LSG-His are the same as in conventional LSG. After continuous suturing of the gastric staple line, one stitch is placed between the proximal side of the gastric greater curvature staple line and the proximal side of the gastric fundus posterior wall with the left diaphragm, and another stitch between the right side of the gastric fundus and the esophagus, reconstructing the sharp His angle. Clinical data, postoperative complications, and follow-up data on weight loss and gastroesophageal reflux disease (GERD) symptoms 1-, 3-, 6-, and 12-months post-discharge were compared between the two groups. GERD symptoms were assessed using the Gastroesophageal Reflux Disease Questionnaire and Reflux Diagnostic Questionnaire.Results:There were no significant differences between the two groups in baseline characteristics, length of hospital stay, hospitalization costs, intraoperative bleeding, postoperative nausea and vomiting, dysphagia, or postoperative complications (all P>0.05). Compared with the LSG group, the LSG-His group had significantly longer operative times (92 [80, 100] minutes vs. 80 [70, 100] minutes, U=2.227, P=0.026), higher postoperative 24-hour pain scores (5.2±1.8 vs. 4.3±1.9, t=-2.065, P=0.041), and higher rates of morphine use (70.5% [31/44] vs. 46.2% [18/39], χ2=4.519, P=0.025). The incidence of new-onset GERD 12 months postoperatively was significantly lower in the LSG-His than the LSG group (10.7% [3/28] vs. 61.3% [19/31], χ2=14.00, P<0.001). According to changes in Gastroesophageal Reflux Disease Questionnaire and Reflux Diagnostic Questionnaire scores, the LSG-His group also had significantly lower rates of exacerbation of GERD (2/16 vs. 5/8, χ2=4.27, P=0.021) and higher rates of GERD remission (12/16 vs. 2/8, χ2=3.62, P=0.032) than did the LSG group. Additionally, excess weight loss rates were significantly higher in the LSG-His group at 3 months [(54.7± 18.7)% vs. (46.5±15.0)% , t=-2.166, P=0.033], 6 months [(73.8±24.7)% vs. (64.0±19.1)% , t=-2.018, P=0.047], and 12 months [(82.9±26.7)% vs. (72.2±19.3)%, t=-2.063, P=0.042] than in the LSG group. Conclusion:Compared with LSG, LSG-His is safe and feasible and achieves better short-term control of postoperative GERD and more effective weight loss. Further large-scale, long-term, prospective studies are needed to confirm the long-term efficacy of LSG-His.

Objective:To investigate the risk factors for aneurysm rupture and post-intervention complications in intracranial arterial stenosis patients with intracranial aneurysms.Methods:A retrospective analysis was performed; 238 intracranial arterial stenosis patients with intracranial aneurysms (306 intracranial aneurysms) admitted to Cerebrovascular Disease Department, Neurosurgery Center, Zhujiang Hospital, Southern Medical University from January 2018 to August 2022 were chosen. Ruptured group and unruptured group were divided according to the rupture of intracranial aneurysms. Additionally, 139 patients who underwent interventional therapy and had complete follow-up data were divided into 2 groups according to occurrence of post-intervention complications. Univariate and multivariate Logistic regression analyses were used to identify the risk factors for aneurysm rupture and post-intervention complications.Results:(1) Of 238 patients, 269 unruptured aneurysms and 37 ruptured aneurysms were noted. Univariate regression analysis showed that significant difference was noted between the ruptured group and unruptured group in female ratio, aneurysm distribution, proportion of irregular shaped aneurysms, percentages of patients with increased white blood cell count, neutrophil count, total cholesterol and D-2 polymer, and percentage of patients with decreased blood lymphocyte count ( P<0.05). Multivariate Logistic regression analysis showed that irregular shaped aneurysms ( OR=12.393, 95% CI: 4.114-37.332, P<0.001), elevated neutrophil count ( OR=18.753, 95% CI: 6.555-53.648, P<0.001), and increased D-2 polymer ( OR=4.410, 95% CI: 1.758-11.065, P=0.002) were independent risk factors for aneurysm rupture in intracranial arterial stenosis patients with intracranial aneurysms. (2) Of the 139 patients, 57 had complications and 82 had no complications. Univariate regression analysis showed that the proportion of patients with hypertension history, distribution of arterial stenosis, and proportion of patients with elevated blood D-2 polymer were significantly different between patients with and without complications ( P<0.05); while multivariate Logistic regression analysis did not identify these 3 indexes as independent risk factors for post-intervention complications ( P>0.05). Conclusion:Patients with irregular shaped aneurysms, elevated blood neutrophil count and D-2 polymer trend to have aneurysm rupture; hypertension history, arterial stenosis, and elevated D-2 polymer have impact on postoperative complications in intracranial arterial stenosis patients with intracranial aneurysms.

The cancer-associated systemic inflammatory response is one of the critical indicators of tumor progression. Serum systemic inflammatory markers, such as neutrophil-lymphocyte ratio, lymphocyte-monocyte ratio, systemic inflammation score, Glasgow prognostic score, prognostic nutritional index, C-reactive protein-albumin ratio, lymphocyte-C-reactive protein ratio, platelet-lymphocyte ratio, are associated with the prognosis of colorectal cancer (CRC) . Further research of the prognostic value of inflammatory marks in CRC can provide help for the prognosis of CRC.

Objective:To evaluate the effect of continuous pump ropivacaine in rectus sheath in the postoperative analgesia after abdominoplasty.Methods:Patients with abdominoplasty who were admitted to the Plastic Surgery Hospital of the Chinese Academy of Medical Sciences from August 2020 to December 2021 were retrospectively analyzed. They were divided into 2 groups: the control group received patient-controlled intravenous analgesia (PCIA) after the operation, sufentanil 100 μg + normal saline diluted to 100 ml, the rate was 2 ml/h, lasted for 48 h, locking time 15 min, Bolus: 0.5 ml; the study group underwent postoperative rectus abdominis intrathecal intubation and continuously infused 0.262 5% ropivacaine saline mixture 100 ml, the rate was 2 ml/h, lasted for 48 h, the locking time is 15 min, Bolus: 0.5 ml. The method of catheter placement in the study group: a catheter was placed unilaterally in the anterior sheath of the rectus abdominis under direct vision, and an incision was made 2 cm below the umbilical plane. The other end is pierced from the umbilicus and connected to the analgesic pump. The visual analogue scale (VAS) for pain and the number of analgesic pump boluses at 24 h and 48 h after operation, the occurrence of postoperative adverse drug reactions and the patient satisfaction at 1 month after operation were collected. The normally distributed measurement data were expressed as Mean±SD, and the comparison between the two groups was analyzed by t-test; the count data was expressed by the frequency (percentage), and the Fisher’s test was used for analysis. Results:A total of 56 patients were included, including 9 males and 47 females, ranging in age from 27 to 53 years old, with ASA graded from 1 to 2, body mass index (BMI) ranged from 26 to 33 kg/m 2. Their rectus abdominis separation ranged from 3 to 7 cm. Compared with the control group, the pain VAS score of the study group at 48 hours after the operation was lower (3.9±1.5 vs. 5.2±1.4, P<0.05), and the number of analgesic boluses was reduced (2.9±0.3 vs. 3.9±0.4, P<0.05), the incidence of adverse reactions such as nausea, vomiting decreased( P<0.05). The satisfaction rate 1 month after operation in the study group was significantly higher than that in the control group [100.0% (30/30) vs. 42.3% (11/26), P<0.05]. Conclusions:Continuous infusion of ropivacaine through anterior rectus intrathecal cannula can effectively relieve abdominal pain after total abdominoplasty, reduce adverse reactions caused by postoperative analgesics, improve patient comfort during hospitalization, and improve overall surgical satisfaction.

Objective:To evaluate the effect of continuous pump ropivacaine in rectus sheath in the postoperative analgesia after abdominoplasty.Methods:Patients with abdominoplasty who were admitted to the Plastic Surgery Hospital of the Chinese Academy of Medical Sciences from August 2020 to December 2021 were retrospectively analyzed. They were divided into 2 groups: the control group received patient-controlled intravenous analgesia (PCIA) after the operation, sufentanil 100 μg + normal saline diluted to 100 ml, the rate was 2 ml/h, lasted for 48 h, locking time 15 min, Bolus: 0.5 ml; the study group underwent postoperative rectus abdominis intrathecal intubation and continuously infused 0.262 5% ropivacaine saline mixture 100 ml, the rate was 2 ml/h, lasted for 48 h, the locking time is 15 min, Bolus: 0.5 ml. The method of catheter placement in the study group: a catheter was placed unilaterally in the anterior sheath of the rectus abdominis under direct vision, and an incision was made 2 cm below the umbilical plane. The other end is pierced from the umbilicus and connected to the analgesic pump. The visual analogue scale (VAS) for pain and the number of analgesic pump boluses at 24 h and 48 h after operation, the occurrence of postoperative adverse drug reactions and the patient satisfaction at 1 month after operation were collected. The normally distributed measurement data were expressed as Mean±SD, and the comparison between the two groups was analyzed by t-test; the count data was expressed by the frequency (percentage), and the Fisher’s test was used for analysis. Results:A total of 56 patients were included, including 9 males and 47 females, ranging in age from 27 to 53 years old, with ASA graded from 1 to 2, body mass index (BMI) ranged from 26 to 33 kg/m 2. Their rectus abdominis separation ranged from 3 to 7 cm. Compared with the control group, the pain VAS score of the study group at 48 hours after the operation was lower (3.9±1.5 vs. 5.2±1.4, P<0.05), and the number of analgesic boluses was reduced (2.9±0.3 vs. 3.9±0.4, P<0.05), the incidence of adverse reactions such as nausea, vomiting decreased( P<0.05). The satisfaction rate 1 month after operation in the study group was significantly higher than that in the control group [100.0% (30/30) vs. 42.3% (11/26), P<0.05]. Conclusions:Continuous infusion of ropivacaine through anterior rectus intrathecal cannula can effectively relieve abdominal pain after total abdominoplasty, reduce adverse reactions caused by postoperative analgesics, improve patient comfort during hospitalization, and improve overall surgical satisfaction.

Objective:To understand the identification and medical observation of close contacts of COVID-19 cases in a city and provide scientific basis for the adjustment of the epidemic prevention and control strategies.Methods:Descriptive epidemiological methods were used to analyze the general characteristics of all the close contacts of COVID-19 cases in a city. Throat swabs were collected from the close contacts for real-time fluorescent RT-PCR. The confirmed cases were diagnosed according to diagnosis and treatment of COVID-19 (trial version 5).Results:Among the 1 665 close contacts of COVID-19 cases in a city, 10 were diagnosed as COVID-19 cases during the medical observation period, accounting for 30.30% of all the confirmed cases in a city, most of them were close relatives of the confirmed cases. The longest contact time with the confirmed cases was 8 days and the shortest was 0 days. Ten COVID-19 cases in close contacts constituted to six family clusters.Conclusions:In COVID-19 prevention and control in a city, the active tracking of the transmission chains of the confirmed cases and timely identification of the close contacts were conducted. The people who had close contacts with the confirmed COVID-19 cases within 14 days before onset were all placed under medical observation, which played a key role in the effective prevention and control of COVID-19 epidemic in a city. Nearly one third of COVID-19 cases occurred during the medical observation period, so the infection sources were effectively controlled and transmission routes were effectively blocked, which greatly facilitated the prevention of the clusters of COVID-19 cases.

Objective:To compare the wound healing time, Surgical site infection (SSI) rate and other postoperative outcomes between the gunsight closure and purse-string closure technique in loop stoma closure.Methods:Between November 2013 and December 2017, a total of 143 patients who underwent gunsight stoma reversal were included in this multicenter prospective randomized controlled trial. The patients were randomized to undergo gunsight (gunsight group, n=72) or purse-string closure technique (purse-string group, n=71). The primary endpoint was wound healing time. The second endpoints were the incidence of SSI, morbidity, and patient satisfaction. Statistical analysis between groups was performed using the t-test, repeated measures analysis of variance, Mann-Whitney U test, χ 2 test or Fisher′s exact test. Results:There were 45 males and 27 females with age of 67 (11) (M( Q R)) years in gunsight group, 42 males and 29 females with age of 65 (20) years in purse-string group. The body mass index, American Society of Anesthesiologist classification, comorbidities, primary diagnosis, the type of ostomy, intraoperative blood loss, perioperative complications, postoperative hospital stay, hospitalization cost, SSI rate and incisional hernia (stoma site) between the 2 groups were not significantly different ( P>0.05). Although had a statistically longer operating time (80(10) minutes vs. 70(10) minutes, Z=-2.381, P=0.017), patients who underwent gunsight procedure and a significantly shorter wound healing time (17(2) days vs. 25(4) days, Z=-10.199, P<0.01), higher patient satisfaction score with regards to wound healing time (3(1) vs. 3(1), Z=-4.526, P<0.01), and higher total patient satisfaction score (25(3) vs. 25(3), Z=-2.529, P=0.011) compared with those who underwent purse-string procedure. Conclusions:The gunsight and purse-string techniques are effective procedures for stoma reversal and both have low SSI rate. The gunsight technique is associated with shorter wound healing time, higher levels of patient satisfaction compared with purse-string technique, and is recommended as the closure technique of choice.