Objective To investigate the risk factors for the occurrence of short-term poor hearing recovery in patients with chronic suppurative otitis media(CSOM)underwent tympanoplasty under otoendoscope(TUO).Methods The clinical data of 260 patients with CSOM treated with TUO from January 2020 to October 2023 were retrospectively analyzed,the patients were followed up for 3 to 6 months after the operation,and were divided into the occurrence group(61 patients)and the non-occurrence group(199 patients)according to whether or not they experienced poor hearing recovery.The clinical data of patients in the two groups were compared,and the independent risk factors affecting the occurrence of poor hearing after TUO in CSOM patients were analyzed by Logistic regression model.Results The results of multivariate Logistic regression analysis showed that tensor tympani defects(OR=1.079,95％CI:1.054～1.105),tympanic mucosal lesions(OR=1.196,95％CI:1.076～1.330),auditory tube incompetence(OR=2.212,95％CI:1.339～3.654),auditory tube inflammation(OR=1.095,95％CI:1.047～1.146),tympanic mucosal fibrosis(OR=2.423,95％CI:1.402～4.186),and preoperative purulent secretion in the tympanic cavity(OR=1.070,95％CI:1.031～1.111)were the independent risk factors contributing to the development of poor hearing recovery after TUO in patients with CSOM(P＜0.05).Conclusion The occurrence of short-term poor hearing recovery after TUO in patients with CSOM is related to tensor tympani defects,tympanic mucosal lesions,auditory tube incompetence,auditory tube inflammation,tympanic mucosal fibrosis,and preoperative purulent secretions in the tympanic cavity,and clinically targeted preventive and curative measures may be given to postoperative patients with CSOM after TUO in order to avoid the occurrence of postoperative short-term poor hearing recovery.

Objective To explore the lung protective effect of pressure controlled ventilation-volume guaranteed(PCV-VG)combined with driving pressure(DP)guided lung protective ventilation strategy in patients undergoing thoracoscopic and laparoscopic radical esophagectomy.Methods 70 patients scheduled for elective thoracoscopic and laparoscopic radical esophagectomy were allocated into two groups using a random number table method:Conventional lung protective ventilation strategy group(group C)and DP guided lung protective ventilation strategy under PCV-VG mode group(group P),35 case in each group.Peak airway pressure(Ppeak),plateau pressure(Pplat),dynamic compliance(Cdyn)and DP were compared between the two groups at 5 minutes after intubation(T1),30 min after pneumoperitoneum established(T2),just prior to one lung ventilation(OLV)(T3),30 min after OLV(T4),60 min after OLV(T5)and 15 min from recovery of two lung ventilation(TLV)(T6).The blood pressure(BP),heart rate(HR),arterial partial pressure of oxygen(PaO2),partial pressure of carbon dioxide in arterial blood(PaCO2)and pH were recorded before anesthesia(T0),T2,T3,T4,T5 and T6 time points.The occurrence of postoperative pulmonary complications(PPCs)also recorded.Results Compared with group C,Ppeak in group P at T1,T2,T4,T5 and T6 time points was significantly decreased,and Cdyn was obviously increased,the differences were statistically significant(P＜0.05).At the T1,T4,T5 and T6 time points,the DP was lower in group P compared to group C,and Pplat at T6 time point was lower than that in group C,the differences were statistically significant(P＜0.05).At the time points of T4 and T5,the PaO2 in group P was higher than that in Group C,and the PaCO2 at T6 time point was also higher than that in group C,the differences were statistically significant(P＜0.05).The comparison of PaCO2 at T0,T2,T3,T4 and T5 time points of the two groups,the difference was not statistically significant(P＞0.05).Comparison of pH between the two groups,the difference was not statistically significant at all time points(P＞0.05).The systolic blood pressure(SBP)of group P was higher than that of group C at the T4 time point,and the diastolic blood pressure(DBP)was lower than that of group C at T6 time point,and the differences were statistically significant(P＜0.05);There were no significant differences in SBP and DBP at T0,T2,T3 and T5 time points,and HR at each time point between the two groups(P＞0.05).There was no statistically significant difference in the occurrence of PPCs within 7 d after operation between the two groups(P＞0.05).Conclusion DP guided lung protective ventilation strategy under PCV-VG mode can improve intraoperative respiratory mechanics,and increase oxygenation during OLV in patients undergoing thoracoscopic and laparoscopic radical esophagectomy,but it does not significantly affect the incidence of PPCs within 7 d after operation.It is worthy clinical significant.

Objective To investigate the efficacy and safety of spinal endoscopic decompression through 45° puncture foraminal approach in treatment of L5/S1 lumbar disc herniation(LDH).Methods Clinical data of 130 patients with L5/S1 level LDH from January 2021 to January 2023 were retrospectively analyzed.These patients were divided into two groups based on the spinal endoscopic surgery approach.Observation group(67 patients)underwent spinal endoscopic decompression via 45° puncture,while the control group(63 patients)underwent spinal endoscopic decompression using the traditional transforaminal endoscopic spinal system(TESSYS)technique.Perioperative indicators such as operation time,X-ray fluoroscopy time,and hospital stay were recorded for both groups.Visual analogue scale(VAS)scores for low back pain and lower limb pain,as well as the Oswestry disability index(ODI)were assessed before surgery and at 1 day,3 months,6 months,and 12 months after operation.The overall efficacy was evaluated using the modified MacNab criterion at 12 months postoperatively.Results All the patients in both groups successfully underwent spinal endoscopic decompression.The observation group had significantly shorter average operation time and intraoperative X-ray fluoroscopy time compared to the control group,the differences were statistically significant(P＜0.05).There was no significant difference in hospital stay between the two groups(P=0.505).Compared to preoperative values,both groups showed a significant decreasing trend in VAS scores for low back pain,lower limb pain,and ODI at 1 day,3 months,6 months,and 12 months after operation,the differences were statistically significant(P＜0.05).The observation group had significantly low back pain VAS score,lower limb pain VAS score and ODI at 1 day and 3 months after operation compared to the control group(P＜0.05).There were no statistically significant differences in low back pain VAS score,lower limb pain VAS score and ODI between the two groups 6 and 12 months after operation(P＞0.05).At 12 months after operation,the excellent and good rate was 95.5％ in observation group and 85.7％ in control group,with no significant difference between the two groups(P=0.054).No surgery-related complications occurred in either group.During postoperative follow-up,6 patients(9.5％)in control group experienced recurrence of low back pain and lower limb pain due to recompression of nerve roots by residual herniated material,while no recurrence was observed in observation group,the difference was statistically significant(P=0.035).Conclusion Both the 45° puncture technique and the traditional TESSYS technique can achieve satisfactory decompression effects in patients with LDH at the L5/S1 segment undergoing transforaminal spinal endoscopic decompression surgery.However,the 45° puncture technique can shorten the operation time and X-ray fluoroscopy time,resulting in more pronounced early postoperative improvement and a lower recurrence rate.It is worthy clinical application.

Objective To investigate the efficacy and safety of self-help inflatable balloon in the treatment of refractory benign upper digestive tract stricture.Methods From November 2022 to February 2024,10 patients with refractory benign upper digestive tract stricture underwent self-help inflatable balloon were retrospectively analyzed.Preoperative treatment,intraoperative and postoperative complications,dysphagia score before and after surgery,wearing time of external self-help inflatable balloon,and the clinical efficacy were evaluated.Results All the 10 patients received self-help inflatable balloon treatment.No complications such as bleeding and perforation occurred in all patients during the wearing of the balloon.The placement time of the balloon was 60～180 d,and the average wearing time was 104.9 d.Before surgery,nine cases had a stricture segment length less than 2 cm,and one case had a stricture segment length of 6 cm.The dysphagia score before surgery was(3.60±0.52),and the dysphagia score after removal of the self-help inflatable balloon was(0.60±0.52),and there was statistical significance in preoperative and postoperative comparison(P＜0.05).The dysphagia score 3 months after removal of the external self-help inflatable balloon was(0.70±0.48),there was no significant difference in dysphagia score between the day after surgery and 3 months after surgery(P＞0.05).The diameter of the stricture before and after operation was(5.09±2.02)mm and(10.35±0.73)mm respectively,and the difference was statistically significant(P＜0.05).Sore throat,wing of nose pain and balloon displacement were the most common adverse events,with 30.0％(3/10),50.0％(5/10)and 70.0％(7/10),respectively.Conclusion It is safe,effective and feasible to treat refractory benign upper digestive tract stricture with self-help inflatable balloon in vitro.It is worthy for clinical application.

Objective Summarize the clinical application and elevating the caudal end of suspension laryngoscope to deal with severe glottis exposure difficulties.Method A retrospective analysis was conducted on the clinical data of 25 patients with severe dystotic glottic exposure(Cormack-Lehane grade Ⅲ or Ⅳ)who underwent laryngoscopy support surgery from January 2021 to January 2024,then analyze the intraoperative management and outcomes.Results In all the patients,after the angle of the suspension laryngoscope was adjusted to the maximum and the glottis could not be exposed satisfactorily,the caudal end of the suspension laryngoscope stent was lifted to obtain a larger tilt angle and field of view.After the caudal end of the stent was elevated by(11.50±6.31)cm,the glottis was exposed satisfactorily in 23 cases and the operation was performed successfully;In 2 cases,the laryngeal mask airway was used in conjunction with a fibrolaryngoscope and laryngeal forceps were used to extract the lesion step by step.Pharyngeal mucosal tearing and oozing of blood occurred in 24 cases,and the bleeding stopped after electrocoagulation;one case had loose and dislodged teeth.There were no significant changes in blood pressure and heart rate of patients before and after stent lifting(P＞0.05).Conclusion For the severe difficulty of glottis exposure during suspension laryngoscopic surgery,it can be dealt with by lifting the caudal end of the stent,which is a simple and effective method that does not cause serious complications and is worth clinical application.

Objective To evaluate the advantages of a real-time computer endoscopy-assisted system(EndoAngel)for colorectal lesions detection in colonoscopy.Methods 2 000 patients who underwent EndoAngel assisted colonoscopy and conventional colonoscopy were selected for the study in a single-center,self-controlled study.According to different examination methods,the patients were divided into artificial intelligence(AI)group and traditional colonoscopy group,each with 1 000 cases.The results were statistically analyzed and compared with the polyp detection rate and adenoma detection rate of the two groups using pathological diagnosis as the gold standard.Further subgroup analysis will be conducted based on the seniority of the operating physicians.Results AI group's polyp detection rate was higher(39.3％)than conventional colonoscopy group polyp detection rate(29.0％),with statistically significant difference(x2=23.59,P=0.000).Of these,the detection rates of hyperplastic polyps and adenomatous polyps were 19.1％and 25.2％,which were significantly higher than those of 12.4％and 20.8％in the conventional colonoscopy group,and the differences were statistically significant(x2=16.92,P=0.000;x2=5.46,P=0.019).Further subgroup analysis of the two groups by physician seniority,the polyp detection rate of AI low seniority group(36.6％)was higher than that of conventional colonoscopy low seniority group(20.40％),with a statistically significant difference(x2=32.20,P=0.000).Among them,the detection rates of hyperplastic polyp(17.8％)and adenomatous polyp(23.6％)in AI low seniority group were higher than those in the conventional colonoscopy low seniority group(12.8％vs 13.6％),and the differences were significant(x2=4.82,P=0.028;x2=16.51,P=0.000).There were no significant differences in adenomatous polyp detection rates between the two groups of senior physicians.Conclusion EndoAngel assisted system can improve the polyp detection rate of colonoscopy,especially for the effect of low seniority physicians is more significant.

Objective To investigate the clinical application value of combined pancreaticobiliary brushing under endoscopic retrograde cholangiopancreatography(ERCP)in the treatment of hepatopancreatic ampulla malignant tumours.Methods We retrospectively analyzed 59 patients from January 2013 to December 2023 for ERCP treatment of hepatopancreatic ampulla tumours,and performed combined pancreaticobiliary brushing(combined pancreaticobiliary brushing group,n=10)and biliary duct brushing alone(biliary duct brushing group,n=49)respectively,then compared the positive pathological detection rate of hepatopancreatic ampulla malignant tumours,the magnitude of bilirubin reduction,and the occurrence of postoperative complications between the two groups.Results The positive detection rate of combined pancreaticobiliary brushing for diagnosing ampulla malignant tumours was 70.0％(7/10),and the positive detection rate of biliary duct brushing alone was 22.4％(11/49),and the positive detection rate of pathology in the two groups was statistically significant(P＜0.05);No significant statistical difference was observed in the decrease of bilirubin between the two groups(P＞0.05);There were three cases of post-operative complications in the biliary duct brushing group.There were no postoperative complications in the combined pancreaticobiliary brushing group.Conclusion Compared with bile duct brushing alone,combined pancreaticobiliary brushing is more helpful for the diagnosis of malignant tumours,and does not increase the incidence of complications.It is worthy for clinical application.

Objective To explore the efficacy of treating patients with endoscopic endonasal dacryocystorhinostomy(EE-DCR)failure by endoscopic endonasal common canaliculorhinostomy(EE-CAR),in order to improve the success rate of reoperation in patients with EE-DCR failure.Methods 44 cases(48 eyes)patients with EE-DCR failure caused by lacrimal sac nasal mucosal ostium atresia from April 2018 to January 2023 were enrolled.They were divided into two groups according to the principle of voluntariness before surgery.Group A(26 eyes)underwent EE-CAR,group B(22 eyes)underwent endoscopic endonasal ostial openning(EE-OO).The postoperative efficacy and complications of the two groups was compared.Results Followed up at 6 months postoperative,the success rate of surgery was 84.62％(22/26)in group A,which was higher than 54.55％(12/22)in group B.There was significant difference between the two groups(P＜0.05).Conclusions EE-CAR is better than EE-OO in the treatment of patients with small lacrimal sac remnant after EE-DCR due to ostium atresia.It is worthy for clinical application.

Objective To investigate the safety and clinical efficacy of the Laennec membrane left side hepatic parenchymal transection-first approach combined with APR triangle in laparoscopic anatomical central hepatectomy.Methods 24 patients underwent laparoscopic anatomical central hepatectomy via Laennec membrane left side hepatic parenchymal transection-first approach combined with APR triangle from January 2023 to June 2024 were selected.Statistical analysis of patients with operation time,intraoperative blood loss,postoperative complications,and postoperative hospital stay.Results All the 24 patients underwent laparoscopic anatomical central hepatectomy without perioperative death.The operation time was(210.2±75.6)minutes(range:95～295 min),and the intraoperative blood loss was(358.9±118.4)mL(range:150～1 100 mL).There was no intraoperative blood transfusion and no conversion to open surgery.The abdominal drainage tube was removed on the average of(5.5±0.5)d(range:4～10 d)after operation,and the average postoperative hospital stay was(7.5±1.5)d(range:5～16 d).There were 5 cases of Clavien-Dindo grade Ⅰ and Ⅱ complications,including 4 cases of abdominal effusion and 1 case of pleural effusion.Postoperative pathology:all patients were hepatocellular carcinoma.Patients with liver malignant tumor were followed up for 1 month to 1.5 years.All the patients survived during the follow-up period,and 2 patients had tumor recurrence.Conclusion For central hepatic segment tumors,laparoscopic anatomical central hepatectomy can be performed using the left hepatic parenchyma via Laennec membrane priority approach combined with APR triangle method,which is safe and feasible.

Objective To explore the application of failure mode and effects analysis(FMEA)in hospital infection control of flexible endoscope cleaning and disinfection.Methods Take the endoscopes cleaned and disinfected in the endoscopy center of a large hospital from October 2020 to October 2021 as the control group,then use the FMEA risk assessment method to manage the whole process of cleaning and disinfection of flexible endoscopes,and take the cleaned and disinfected endoscopes optimized after the intervention from November 2021 to November 2022 as the test group,compare the monitoring results and disinfection qualification rates of risk priority number(RPN),endoscopic disinfection,medical compressed air,and rinse water microorganisms in two main failure modes.Results After FMEA optimization,the RPN values of the six main failure modes decreased significantly.The qualification rates of gastroscope and enteroscope disinfection increased from 88.03％ and 73.08％ to 97.44％ and 96.15％ respectively,the qualification rates of rinsing water and compressed air for drying increased from 30.00％ and 65.00％ to 95.00％ and 95.00％ respectively,the differences were statistically significant(P＜0.05).Conclusion The monitoring of rinsing water and dry gas,the training of homogeneity specification,and the improvement of supporting cleaning consumables are high-risk links in the cleaning and disinfection process of endoscopes.The process supervision should be strengthened,and the implementation of FMEA plays an important role in improving the qualification rate of cleaning and disinfection of endoscopes.