目的 探讨继发性肺结核合并肺部真菌感染的临床特点及相关高危因素。方法 收集广州市胸科医院2017年7月—2019年10月收治的继发性肺结核患者资料,病程均大于3个月,分为真菌感染组106例和非真菌感染组100例进行回顾性分析。结果 单因素分析结果显示,合并肺部其他疾病、非初治、咯血、空洞、应用广谱抗生素>l周、侵袭性操作存在统计学差异(P<0.05)。Logistic多因素分析结果显示,广谱抗生素使用>l周、侵袭性操作为真菌感染的独立危险因素(P<0.05)。结论 对于应用广谱抗生素、进行侵袭性操作的肺结核患者应警惕真菌感染风险,及早预防及诊治。

Objective To investigate the clinical characteristics and related high risk factors of secondary pulmonary tuberculosis complicated with pulmonary fungal infection. Methods Data of patients with secondary tuberculosis admitted to Guangzhou Chest Hospital from July 2017 to October 2019 were collected. All patients with a course of disease longer than 3 months were divided into the fungal infection group (n =106) and the non-fungal infection group (n =100) for retrospective analysis. Results Univariate analysis results showed that there were statistical differences in combined other pulmonary diseases, non-initial treatment, hemoptysis, cavity, application of broad-spectrum antibiotic > for 1 week, and invasive operation (P<0.05). Logistic multivariate analysis showed that >1 week of broad-spectrum antibiotics and invasive procedures were independent risk factors for fungal infection (P<0.05). Conclusion Patients with tuberculosis who are treated with broad-spectrum antibiotics and invasive procedures should be alert to the risk of fungal infection, early prevention and treatment should be undertaken.

目的 探讨无创血流动力学监测(non-invasive cardiac output monitoring,NICOM)在儿童脓毒性休克早期液体复苏的临床应用评价。方法 选取2019年1月—2020年6月期间在我院PICU患儿诊断为儿童脓毒性休克61例,随机分为对照组(未接受NICOM监测29例)和干预组(接受NICOM监测32例),记录液体复苏后6、12、24小时血气分析(pH值、剩余碱、乳酸)、尿量以及病死率、NICOM监测(CO、CI、SVR、SV、SVRI、HR、MAP)等结果。结果 液体复苏6 小时后两组HR、MAP、乳酸、剩余碱、尿量比较无统计学差异 (P>0.05),液体复苏12 h后干预组乳酸较对照组降低,差异有统计学意义(P<0.05);液体复苏24 h后两组HR、MAP、乳酸、剩余碱及尿量比较,差异均有统计学意义 (P<0.05)。干预组治疗后12 h在CO、CI、SVR、SV、SVRI、HR、MAP较治疗前改善,差异均有统计学意义(P<0.05),干预组治疗后24 h在CO、CI、SVR、SV、SVRI、HR、MAP较治疗前改善,差异均有统计学意义(P<0.05)。结论 NICOM具有敏感度及准确率高,且操作简单,可有效用于指导脓毒性休克早期液体复苏,针对个体化治疗提供客观依据,正确指导容量管理,具有科学实用价值,值得推广。

Objective To evaluate the clinical application of non-invasive cardiac output monitoring (NICOM) for early fluid resuscitation in children with septic shock. Methods 61 children diagnosed with septic shock in the PICU at our hospital between January 2019 and June 2020 were randomly divided into a control group (29 without NICOM monitoring) and an intervention group (32 with NICOM monitoring), and the results of blood gas analysis (pH,lactate and residual base), urine volume, and mortality, and NICOM monitoring (CO, CI, SVR, SVRI, HR, and MAP) were recorded at 6, 12, and 24 h after fluid resuscitation. Results There was no statistically significant difference in HR, MAP, lactic acid, residual base and urine volume between the two groups after 6 h of fluid resuscitation (P>0.05), and lactic acid was lower in the intervention group than that in the control group after 12 h of fluid resuscitation (P<0.05); the differences in HR, MAP, lactic acid, residual base and urine volume between the two groups after 24 h of fluid resuscitation were all statistically significant (P<0.05). The differences were statistically significant (P<0.05) in CO, CI, SVR, SVI, HR, and MAP at 12 h and at 24 h after treatment in the intervention group compared with that of the pre-treatment (P<0.05). Conclusion NICOM has high sensitivity and accuracy and it can be operated in simple processes. It may be effectively applied to guide the early fluid resuscitation of septic shock. It also provides Objective evidence for individualized treatment and correctly guides volume management. Its scientific and practical value makes it worth promoting.

目的 了解广州市肾综合征出血热住院病例临床表现和流行病学特征,分析患者出现重症的影响因素,为加深疾病认知和识别重症提供科学依据。方法 回顾性选取2014年1月以来在广州市二级及以上医疗机构住院的明确诊断为肾综合征出血热的患者572例作为本研究研究对象,自行设计问卷,收集患者流行病学史、临床表现和实验室检测结果,采用多因素Logistic回归分析识别患者重症HFRS的影响因素。结果 572例患者中男406人,女166人,男女比2.45:1,年龄最小者14岁,最大89岁,平均年龄(41.21±14.16)岁。临床表现以发热、起病急、乏力为主,三者分别占比96.33%、88.29%和82.32%,重症病例93例,重症率16.26%,不同颈红、胸红、腹痛、腹泻、恶心、呕吐、眼睑浮肿、黄疸、少尿或无尿、低血压、休克、白细胞计数减少、尿膜状物情况和鼠类暴露情况的患者重症发生率差异有统计学意义(均 P<0.05),多因素Logistic回归分析结果显示年龄为40～49岁、呕吐、休克、房内有老鼠及食物粮食无防鼠设备是患者发生重症的危险因素,其OR值和95%CI分别为2.712(95%CI:1.039~7.077)、2.99(95%CI:1.462~6.114)、5.822(95%CI:1.891~17.927)和3.292(95%CI:1.479 ~7.327)。结论 临床表现有呕吐和休克症状以及有明确的啮齿类动物暴露史者重症的风险更高,在今后的防治中,应进一步加强健康宣传教育,广泛开展灭鼠活动,临床上对存在高危风险的病例进行早期干预以提高患者的预后效果。

Objective To understand the clinical manifestations and epidemiological characteristics of hospitalized cases of hemorrhagic fever with renal syndrome in Guangzhou, analyze the influencing factors of patients with severe illness, and provide scientific basis for deepening disease recognition and identifying severe illness. Methods A retrospective selection of 572 patients with a clear diagnosis of hemorrhagic fever with renal syndrome who were hospitalized in second-level and higher medical institutions in Guangzhou since January 2014 were selected as the research objects. Questionnaires were designed and the epidemiological history clinical manifestations and laboratory test results of patients were collected. Multivariate logistic regression analysis was used to identify the influencing factors of patients with severe HFRS. Results Among the 572 patients, there were 406 males and 166 females. The male-to-female ratio was 2.45:1. The youngest was 14 years old, the oldest was 89 years old, and the average age was (41.21±14.16)years old. The clinical manifestations were mainly fever, acute onset, and fatigue, which accounted for 96.33%, 88.29% and 82.32%. There were 93 severe cases with a severe rate of 16.26%. Different neck redness, chest redness, abdominal pain, diarrhea, nausea, and nausea, vomiting, eyelid edema, jaundice, oliguria or anuria, hypotension, shock, decreased white blood cell count, urine membranes and rodent exposure, there were statistically significant differences in the incidence of severe illness (all P<0.05). The logistic regression analysis of factors showed that the age of 40-49 years, vomiting, shock, the presence of rats in the room, and food without rodent-proof equipment were risk factors for severe illness. The OR values and 95%CI were 2.712 (95 %CI: 1.039-7.077), 2.99 (95%CI: 1.462-6.114), 5.822 (95%CI: 1.891-17.927) and 3.292 (95%CI: 1.479-7.327). Conclusion Patients with clinical manifestations of vomiting and shock symptoms and a clear history of rodent exposure are at higher risk of severe illness. In the future prevention and treatment, health promotion and education should be further strengthened, rodent control activities should be carried out extensively, and early intervention is taken clinically to improve the patient's healing effect.

目的 探讨联合镇静胃肠镜检查在安全性、可行性的效果以及优势方面的临床应用,为优化诊疗流程、方便患者提供科学依据。方法 纳入我院2017年6月—2018年3月行镇静胃肠镜检查的140例患者为研究对象,采用便利抽样法随机分为两组,观察组70例患者行联合镇静胃肠镜检查,对照组70例患者行胃肠镜分次检查。记录并对比分析两组患者的预约时间、检查时长、不适反应、疼痛程度、满意度、检查费用。结果 观察组在预约时间和检查时长、检查后心率变化,患者满意度和检查费用方面,与对照组相比有统计学差异(P＜0.05),而在血压、血氧、镇静及遗忘程度、疼痛程度及不适反应方面无统计学差异(P＞0.05)。结论 联合镇静胃肠镜检查在临床应用方面安全可行,具有便宜、时间少、患者配合度好、符合患者意愿、而且满意度高的优势,值得推广。

Objective To explore the scientific evidence in optimization of diagnosis and treatment process for patients' convenience, we evaluated the clinical effect of gastrointestinal endoscopy with sedation on the safety, feasibility and advantage. Methods We enrolled 140 patients who came to our hospital for gastrointestinal endoscopy from June 2017 to March 2018. We used the convenience sampling method that the patients were randomly divided into two groups: observation group of 70 patients with combined endoscopy, and the control group of 70 patients with seperate endoscopy. We recorded and compared the two groups of patients of appointment time, inspection time, pain degree, patient satisfaction, and cost. Results The two groups were different in the appointment time, inspection time, heart rate changes after endoscopy, patient satisfaction and the costs (P<0.05), while no significant difference was found in blood pressure, blood oxygen degree, sedation, pain degree and discomfort reaction(P>0.05). Conclusion Combined sedative gastrointestinal endoscopy is safe and feasible in clinical application, with the advantages of low cost, less time, good patient cooperation, in line with the wishes of patients, and high satisfaction, which is worthy of popularization.

目的 分析濮阳市人民医院肺炎克雷伯菌(Klebsiella pneumoniae,K. pneumoniae, KPN) 的临床分布、流行病学特点及耐药情况,以促进临床合理用药。方法 回顾性分析濮阳市人民医院2020年1—3月临床送检标本中分离出的209株肺炎克雷伯菌的分布及耐药情况。结果 临床标本中共分离出肺炎克雷伯菌209株,在肠杆菌科细菌中占比为68.30%;标本来源以痰液、血液和尿液为主,分别占75.11%、9.09%、5.74%;分离菌株数量较多的科室为ICU、神经外科一病区、EICU病区和胸外科病区,分别占比47.37%、 17.7%、3.35%和3.35%。产超广谱β-内酰胺酶(ESBLs)菌株检出率为11.48%,耐碳青霉烯肺炎克雷伯菌(CRKP)检出率为58.37%。不同来源KPN的耐药性具有显著差异, 综合ICU KPN的耐药率高于其他病区。结论 濮阳市人民医院临床分离KPN对常用抗菌药物有一定的耐药性,尤其以综合ICU分离菌株耐药严重,应加强监测KPN耐药情况,有针对性的选择抗菌药物,并增强院感防控,以减轻KPN的耐药情况。

Objective To analyze the characteristic of clinical distribution, epidemiological and drug resistance of Klebsiella pneumoniae (KPN) in the People's Hospital of Puyang City,and to provide evidence for rational use of antimicrobial drugs in clinical treatment. Methods A retrospectively analysis was conducted on 209 strains of KPN isolated from the clinical specimens in the People's Hospital of Puyang City from January 2020 to March 2020. Results A total of 209 strains of KPN were isolated from clinical specimens, accounting for 68.30% of enterobacteriaceae bacteria; the sources of specimen were mainly from sputum, blood and urine, accounting for 75.11%, 9.09% and 5.74% respectively; the departments with more isolated strains were ICU department, neurosurgery first department, EICU department, and thoracic surgery department, accounting for 47.37%, 17.7%, 3.35% and 3.35% respectively. Besides, the detection rate of extended spectrum β-lactamase(ESBLs) strains was 11.48%,and the detection rate of carbapenems-resistant klebsiella pneumoniae (CRKP) strains was 58.37%. The results showed that the drug resistance of KPN from different sources was with a significantly difference, and the drug resistance rate of KPN in comprehensive ICU was significantly higher than that of other departments. Conclusion The resistance of KPN isolated from the People's Hospital of Puyang City to common antibiotics is not optimistic. In particularly, the drug resistance of KPN isolated strains from the comprehensive ICU is more serious. Hence, the monitoring of KPN resistance should be strengthened and the effective prevention and control measures of hospital infection should be adopted. Furthermore, antibacterial drugs should be used rationally to reduce the generation of drug-resistant bacteria.

目的 探讨在关节镜下膝关节前交叉韧带损伤重建术治疗的临床效果。方法 选取2018年3月—2020年3月之间我院接受住院治疗的80名膝关节前交叉韧带损伤患者作为研究对象。根据手术方式的不同,常规手术进行交叉韧带损伤的重建术治疗为常规组,关节镜下膝关节前交叉韧带损伤重建术治疗为研究组,每组各40名患者,比对两组的治疗效果。结果 通过数据得出常规组的膝功能评分(71.8±12.6)及膝功能不稳评分(13.2±1.6)要低于研究组膝功能评分(83.9±12.9)及膝功能不稳评分(19.3±2.3),差异有统计学意义(P＜0.05)。在术后疼痛评分上研究组(3.35±0.23)各项数据均优于常规组(4.35±1.69),差异有统计学意义(P＜0.05)。研究组并发症发生率仅为5%,常规组并发症发生率有17.5%,研究组数据远要低于常规组,差异有统计学意义(χ^<sup>2=5.178,P=0.023)。结论 在膝关节镜下前交叉韧带损伤重建术治疗可有效改善膝关节活动性、稳定性、有效减轻患者的疼痛感,减少并发症的发生,促进膝关节功能的康复。关节镜下进行膝关节前交叉韧带损伤重建术治疗具有临床推广和采纳的价值。

Objective To investigate the clinical effect of arthroscopic anterior cruciate ligament (ACL) reconstruction. Methods 80 patients with ACL injury in our hospital from March 2018 to March 2020 were selected as the research objects. According to the different surgical methods, patients underwent the traditional open surgery for cruciate ligament injury reconstruction treatment were selected as the control group,patients underwent arthroscopic anterior cruciate ligament injury reconstruction treatment were as the study group, 40 patients in each group, the treatment effect of the two groups were compared. Results The Lysholm score (71.8±12.6) and and Lysholm instability score (13.2±1.6) of the control group were lower than those of the study group (83.9±12.9 and 19.3±2.3), the differences were statistically significant (P <0.05). In the postoperative pain score, the study group (3.35±0.23) data was better than the control group (4.35±1.69), the difference was statistically significant (P <0.05). The incidence of complications in the study group was only 2.5%, and that in the control group was 17.5%, which was significantly lower than the control group, and the difference was statistically significant (χ²= 5.178, P= 0.023). Conclusion Arthroscopic anterior cruciate ligament reconstruction can effectively improve the activity and stability of knee joint, effectively reduce the pain of patients, reduce the occurrence of complications, and promote the rehabilitation of knee joint function. Arthroscopic anterior cruciate ligament reconstruction has the value of clinical promotion and adoption.

目的 探讨瑞格列奈联合胰岛素治疗2型糖尿病临床疗效及对患者血糖水平的影响效果。方法 选取我院2019年1月—2021年1月收治的2型糖尿病患者324例,用随机数字法分为两组,每组各52例,对照组应用胰岛素治疗,研究组应用瑞格列奈联合胰岛素治疗。对两组2型糖尿病患者的临床疗效、血糖水平(FPG指数、2 h PG指数、HbA1c指数)以及胰岛素水平(HOMA-β水平、HOMA-IR水平)进行比较。结果 研究组疗效高于对照组(P＜0.05);研究组治疗后血糖指数优于对照组(P＜0.05);研究组治疗后胰岛素水平优于对照组(P＜0.05)。结论 2型糖尿病患者在治疗时,应用瑞格列奈联合胰岛素治疗,可增强治疗疗效,有效控制血糖水平,改善胰岛功能,从而促进疾病转归,具有极大的推广价值。

Objective To investigate the clinical efficacy of repaglinide combined with insulin in the treatment of type 2 diabetes mellitus and its effect blood glucose level. Methods A total of 324 patients with type 2 diabetes admitted to our hospital from January 2019 to January 2021 were randomly divided into two groups with 52 patients in each group. The control group was treated with insulin, and the research group was treated with repaglinide combined with insulin. Clinical efficacy, blood glucose level (FPG index, 2HPG index, HbA1c index) and insulin level (HOMA-β level, HOMA-IR level) of patients with type 2 diabetes were compared between two groups. Results The therapeutic effect of the research group was higher than that of the control group (P<0.05). The glycemic index of the research group was better than that of the control group (P<0.05). The insulin level in the research group was better than that in the control group (P<0.05). Conclusion In the treatment of type 2 diabetes mellitus, the application of repaglinide combined with insulin can enhance the therapeutic effect, effectively control the blood glucose level, improve the islet function, so as to promote the outcome of the disease, which has great promotion value.

目的 分析肝脓肿的临床基线及病原学特征,旨在提高临床对该病早期识别、病原体预判、并发症警惕及抗感染治疗能力。方法 收集广州番禺区中心医院2019年1月—2020年11月收治的肝脓肿病例相关临床及实验室资料。按病原体培养结果分成阳性组、阴性组。阳性组中,按不同致病菌分成肺炎克雷伯及非肺炎克雷伯亚组。比较不同组别间基线特征及实验室数据。结果 共收集肝脓肿71例,病原学培养阳性率83.1%(59例),其中肺炎克雷伯菌46例(80%)。最常见合并症包括糖尿病(54.9%)、胆道疾病(56.3%)、肺部感染(67.6%)等。病原体阳性组PCT和AST水平高于阴性组(P<0.05),但是两组之间基线特征无差异(P>0.05)。肺炎克雷伯亚组与其他病原体组相比,合并糖尿病的风险更高(P=0.007),PLT、PCT、ALT、AST和白蛋白的水平具有显著差异(P <0.05)。经过积极治疗,大多预后良好,未见死亡病例,其中7例患者发生严重侵袭性脓肿,遗留后遗症。结论 病原体阴性肝脓肿致病力方面与阳性组并无差别。肺炎克雷伯杆菌已成为肝脓肿中最常见菌群,其多见于合并糖尿病患者。其PLT、PCT、ALT、AST指标明显高于其他菌群组,伴白蛋白消耗明显。少数可伴有全身严重侵袭性脓肿。

Objective To investigate the clinical and etiological characteristics of pyogenic liver abscess (PLA) as a reference for its early identification,early prediction of pathogens, alertness to complications and rational antibacterial treatment. Methods A single center retrospective study was carried out in patients with PLA in Guangzhou Panyu Center Hospital from January 2019 to November 2020.The clinical and laboratory data of all liver abscess cases were concluded. Baseline characteristic and laboratory outcomes were grouped into Klebsiella pneumoniae group and non-Klebsiella pneumoniae subgroup according to different pathogenic bacteria. Results Among a total of 71 patients with liver abscess, 83.1%(n=59)had positive cultures. Klebsiella pneumoniae accounted for the most in 46 cases (80.0%). The most common complications included diabetes(50.7%), biliary tract disease(56.3%), pulmonary infection(67.6%) etc. The levels of PCT and AST in pathogen culture-positive group were higher than those in culture-negative group, with statistical significance (P<0.05),on the contrary there were no differences in baseline characteristic among the groups according to the results of pathogens. Compared with other pathogens, the group of Klebsiella pneumoniae liver abscess presented higher risk of diabetes.The levels of PLT, PCT, ALT, AST,and albumin in the two groups were different (P<0.05). Most patients had good outcomes, while 7 patients had residual problems represented with severe invasive abscess. Conclusion There were similar consequences between negative and positive liver abscesses. Klebsiella pneumoniae has become the most common bacteria in liver abscess. Among which, PLT、PCT、ALT、AST indexes are higher than that of other bacteria with obvious albumin depletion, even some of which may be accompanied by systemic severe invasive abscess.

目的 探讨无症状感染者在新冠肺炎家庭聚集性疫情中的传播风险,分析家庭聚集性疫情中所有患者的住院治疗情况,为防控策略和治疗方案制定提供依据。方法 通过现场流行病学调查获得旅居史和暴露危险因素,并收集临床治疗资料,利用统计软件进行作图和分析。结果 指示病例的潜伏期为15天,其余4名家庭成员的潜伏期为1～15天,其中指示病例作为无症状感染者,在感染后第4～6天内具有传染性相继导致4名成员感染;指示病例携带病毒8天以上,其余4人从2天到31天不等; 症状持续时间5~20天,住院期间共进行CT检查次数为4～10次,肺部炎症最快在住院第三天好转。发病初期只有1个病例出现白细胞、淋巴细胞降低。发病到就诊和住院的时间间隔为1～10天,平均住院时间为23.4天。结论 无症状感染者在家庭聚集性疫情传播中具有关键作用,难以及时发现,存在较大传播风险,为新冠肺炎疫情防控带来较大难度。

Objective To study the transmission risk of asymptomatic patient in a family-clustered outbreak of new coronavirus pneumonia, analyze the hospitalization,and provide a basis for prevention strategies and treatment plan. Methods We collected the information about residence history and exposure risks by onsite epidemiological investigation, and collected clinical treatment-related data, used statistical software for mapping and analysis. Results The incubation period of the indicated case was 15 days, and the incubation period of the remaining four family members were 1-15 days. The indicated case as an asymptomatic patient had infectious succession within 4-6 days after infection,and four family members were infected one after another. The indicated case carried the virus for more than 8 days, and the remaining 4 patients ranged from 2 to 31 days. The duration of symptoms was 5-20 days of all 5 patients, and the number of CT examinations during hospitalization was 4-10 times. The pulmonary inflammation was improved on the third day of hospitalization at best. In the early stage of the disease, only one patient had leukopenia and lymphopenia decreased. The interval between onset and hospitalization was 1-10 days for five family members, with an average hospitalization time of 23.4 days. Conclusion The asymptomatic infected patient of COVID-19 plays a key role in the family convergence epidemic transmission. The symptoms are inapparent, so it is difficult to find in time. It will cause the risk of infection and increase the difficulty of COVID-19 prevention and control.

目的 探讨内镜黏膜下剥离术(ESD)治疗结直肠高级别上皮内瘤变(HGIN)的安全性及临床疗效。方法 回顾性分析2016年1月—2019年6月在南方医科大学附属小榄医院经肠镜活检诊断为结直肠HGIN并接受ESD治疗的56例患者的临床资料,记录每例病变的术后病理、整块切除率、治愈性切除率、手术并发症和随诊结果。结果 病灶平均直径为(2.28±0.76) cm。53例经ESD术完整切除,3例术中改用内镜下黏膜分片切除术切除,整块切除率为94.64％ (53/56)。术后病理51例HGIN,2例HGIN伴黏膜内癌,2例浸润性癌,术前活检与术后病理总符合率为92.86%(52/56),治愈性切除率为96.43%(54/56)。术中出血发生率为89.29%(50/56),术后迟发性出血发生率为3.57%(2/56)。术中穿孔发生率为5.36%(3/56),无术后迟发性穿孔病例。中位随访期为17个月,期间共1例患者复发。结论 ESD术治疗结直肠HGIN安全有效,但需警惕浸润性癌的可能。ESD术具有较高的术中出血和穿孔的风险,术者需具备熟练的操作技术及处理手术并发症的经验。

Objective To investigate the clinical efficacy and safety of endoscopic submucosal dissection (ESD) for colorectal high-grade intraepithelial neoplasia (HGIN). Methods Data of 29 patients diagnosed as colorectal HGIN and underwent endoscopic submucosal dissection (ESD) from January 2016 to June 2019 were retrospectively analyzed. Postoperative pathology, total en bloc resection rate, curative resection rate, complication and follow-up results were recorded. Results The mean diameter of the lesions was (2.28±0.76) cm. A total of 53 cases were successfully treated by ESD, 3 cases were changed using endoscopy piecemeal mucosal resection, the en bloc resection rate was 94.64% (53/56). Postoperative diagnosis confirmed 52 cases of HGIN, 2 cases of HGIN with intra-mucosal cancers and 2 case of invasive cancer,the overall consistency rate between preoperative biopsies and postoperative pathological diagnosis was 92.86% (52/56), the curative resection rate was 96.43% (54/56). The incidence of intro-operative bleeding and postoperative delayed bleeding was 89.29% (50/56) and 3.57% (2/56) respectively. The incidence of intro-operative perforation was 5.36% (3/56) and no delayed perforation occurred. The median follow-up period was 17 months and one case recurred. Conclusion ESD is a safe and effective treatment for colorectal HGIN, but invasive cancer must be cautioned. ESD has high risk of intro-operative bleeding and perforation, therefore, the surgeon must have skilled operation and treatment experience for complications.