3D-printed prostheses for large bone defect reconstruction following bone tumor surgery北大核心

BACKGROUND: Tumor segment resection is one of the standard methods for the treatment of bone tumors. However, the reconstruction of bone defects atumor resection faces many challenges. A growing number of researchers are focusing on 3D-printed prostheses for bone defect repair and reconstruction following bone tumor surgery. OBJECTIVE: To explore the feasibility of 3D-printed prostheses in the reconstruction of large bone defect following bone tumor surgery and to evaluate the postoperative outcomes. METHODS: Retrospective analysis of clinical data of 24 patients [19 males and 5 females, age 23.8 (6-61) years] who underwent bone tumor resection and 3D-printed prosthesis implantation in the Department of Bone Oncology, the First Affiliated Hospital of Xinjiang Medical University from December 2020 to September 2021 was conducted. There were 7 cases with distal femur tumor, 5 with pelvis tumor, 4 with proximal tibia tumor, 3 with middle femur tumor, 1 with distal tibia tumor, 1 with proximal humerus tumor, 1 with middle humerus tumor, 1 with scapula tumor, 1 with ulna tumor, and 22 cases with primary tumors (13 osteosarcoma, 4 Ewing sarcoma, 2 giant cell tumor of bone, 1 chondroblastoma, 1 chondrosarcoma, and 1 osteoblastoma), 2 metastatic carcinoma. Preoperative and postoperative imaging data were recorded and neoadjuvant chemotherapy was administered in 17 cases before surgery. The Musculoskeletal Tumour Society score was used to assess limb function before surgery and 6 months after surgery, and pain was assessed by the Visual Analog Scale, as well as the complications were recorded. RESULTS AND CONCLUSION: (1) All patients undergoing resection of the tumor segment and 3D-printed prosthesis implantation for the reconstruction of the bone defect were followed for 6-49 months, and the results showed that the length of osteotomy was (18.2 ± 7.3) cm and an average intraoperative bleeding volume was 740 (100-3 000) mL. (2) Two patients died of systemic metastasis, the remaining 22 had no pulmonary metastasis or recurrence during the follow-up period, and 1 patient developed aseptic loosening of the prosthesis at 25 months postoperatively. (3) The Musculoskeletal Tumour Society scores were significantly increased, while Visual Analog Scale scores were significantly decreased (P < 0.05) at 6 months postoperatively. (4) The Musculoskeletal Tumor Society score was rated excellent in all 22 patients at the final follow-up. (5) These results suggest that 3D-printed prosthesis is suitable for the reconstruction of large bone defects caused by bone tumor resection. Patients have good postoperative function and few complications. However, further investigations are needed to explore long-term follow-up results. © 2023, Publishing House of Chinese Journal of Tissue Engineering Research. All rights reserved.     

对比分析胆道术后胆管狭窄内镜与开腹手术治疗的临床疗效

目的研究治疗胆道术后胆管狭窄内镜与开腹手术的临床效果。方法 100例肠道内科手术后胆管狭窄患者,接受开腹手术治疗(对照组)及内镜手术治疗(探究组)患者各50例,比较两组临床治疗效果。结果对照组治疗总有效率72.00%,探究组治疗总有效率98.00%,两组总有效率比较差异具有统计学意义(P<0.05)。结论经过内镜手术治疗效果更优,可以降低手术创伤,改善手术效果,有利于患者的恢复,具有创伤小、恢复快、预后佳等优点。     

骨髓增生异常综合征患者血清sICAM-1、TGF-β1和白血病抑制因子的检测水平

目的探讨骨髓增生异常综合征（MDS）患者可溶性细胞间粘附分子-1（sICAM-1）、转化生长因子β1（TGF-β1）和白血病抑制因子（LIF）水平及其在MDS免疫发病机制中的作用。方法采用酶联免疫夹心（ELISA）法检测25例MDS患者和20例正常人血清sICAM-1、TGF-β1、和LIF水平。结果与正常组比较,MDS患者sICAM-1水平明显升高（P〈0.01）;TGF-β1水平明显降低（P〈0.01）;LIF水平有下降趋势,但无统计学意义（P〉0.05）。结论sICAM-1、TGF-β1和LIF三种细胞因子与MDS免疫发病机制密切相关。     

惠州市同型α地中海贫血夫妇的胎儿产前地贫基因诊断分析

目的研究惠州市同型α地贫夫妇的胎儿地贫发生率、基因突变类型和分布特点,为制订本地区地贫的防治工作计划提供科学依据。方法 154对夫妇均为轻型α地中海贫血基因携带者,在孕早期取胎儿绒毛组织,孕中期取脐血或羊水,孕晚期取脐血;对羊水细胞和绒毛组织进行原位培养,脐血进行血液学和血红蛋白分析,分别采用培养前后的组织或脐血进行α地中海贫血基因检测。结果在154例胎儿中,检出重型α地中海贫血胎儿18例,检出率为11.69%;检出α地贫携带者75例,检出率为48.70%;检出缺失型HbH病9例,检出率为5.84%;检出正常胎儿50例,检出率为32.47%;检出纯合子和双重杂合子各1例。结论本研究描述了惠州市同型α地贫夫妇的胎儿α地贫的发生率,基因突变类型和分布特点,为制订本地区地贫的防治工作计划提供科学依据。     

2018—2019年赤道几内亚Bioko岛恶性疟原虫抗药性基因多态性分析

目的　调查赤道几内亚Bioko岛恶性疟原虫多药耐药蛋白1（Plasmodium falciparum multidrug resistance protein 1, PfMDR1）、氯喹抗性转运蛋白基因（P. falciparum chloroquine resistant transporter, PfCRT）和Kelch 13基因（P. falciparum Kelch 13, PfK13）多态性,为当地疟疾防控策略制定提供参考。方法　采集2018—2019年赤道几内亚Bioko岛恶性疟原虫感染者外周血样本85份,提取基因组DNA。采用巢式PCR技术扩增PfMDR1、PfCRT和 PfK13基因,对扩增产物进行DNA测序,并对基因序列进行比对。结果　赤道几内亚Bioko岛恶性疟原虫PfK13基因不存在已知与青蒿素抗性相关的突变;PfMDR1基因和PfCRT基因均存在不同比例抗药性突变,其中PfMDR1_N86Y、PfMDR1_Y184F和PfCRT_K76T突变率分别为35.29%（30/85）、72.94%（62/85）和24.71%（21/85）。结论　赤道几内亚Bioko岛恶性疟原虫PfMDR1、PfCRT基因和 PfK13基因均存在不同程度突变。     

应用核素标记相对和绝对定量技术对大鼠急性脊髓损伤的蛋白组学研究

急性脊髓损伤(ASCI)是一种严重的神经系统创伤,是致残的主要病因之一[1].我们应用核素标记相对和绝对定量(iTRAQ)技术探索SD大鼠ASCI后0 h和6 h的脊髓差异蛋白的表达. 一、材料与方法 1.一般资料:选用新疆医科大学第一附属医院实验动物中心[许可证编号SCXK(新)2011-0004]提供的2个月龄SD雄性大鼠8只,体质量约250 ～ 350 g(平均300 g).动物实验方法符合动物伦理学要求(伦理审批号20120220005). 2.动物实验分组及模型建立:将8只2月龄SD雄性大鼠随机分2组,即脊髓损伤后0 h组(H-0组)、脊髓损伤后6h组(每组各4只),参照Allen's方法建立大鼠ASCI模型.     

应用SELDI-TOF-MS技术对大鼠急性脊髓损伤后脑脊液蛋白组学的研究

急性脊髓损伤(ASCI)是一种严重的神经系统创伤,目前仍缺乏有效的治疗措施[1-2].我们应用表面增强激光解吸电离飞行时间质谱(SELDI-TOF-MS)技术分析大鼠ASCI后脑脊液蛋白质指纹图谱,找出明显变化的差异蛋白.     

聚丙烯人工补片在骨恶性肿瘤关节置换中的应用

目的探讨骨恶性肿瘤关节置换患者术中应用聚丙烯人工补片修复关节囊及软组织的方法及其价值。方法2014年3月至2017年1月,回顾性分析12例接受肩关节及髋关节周围非病理性骨折的骨恶性肿瘤关节置换手术患者,男7例,女5例;年龄5~74岁,平均42岁。肩关节置换4例,髋关节置换8例。骨转移癌7例,骨原发性恶性肿瘤5例。所有患者均行广泛切除+假体置换术,并用聚丙烯人工补片修复关节囊。患者术前、术后的关节功能用美国骨与软组织肿瘤协会(musculoskeletal tumor society,MSTS)功能评价系统进行评估。结果本组患者均获随访,随访时间6~20个月,平均10.5个月。术后平均5d拔除术区引流管,伤口均I期愈合,术后功能恢复良好,均无术后并发症,伤口渗液无明显增多。术前MSTS关节功能评定,良4例,可8例;术后MSTS关节功能评定,良10例,可2例。随访期间,所有患者对诊疗效果满意。结论聚丙烯人工补片对骨恶性肿瘤广泛切除后软组织缺损的修复及关节假体置换后关节的稳定性和动力重建起到了重要的作用,近期疗效满意。     

低温等离子髓核消融联合盘内注射臭氧治疗腰椎间盘突出征疗效观察

目的探讨C型臂X线机引导下低温等离子髓核消融联合盘内注射臭氧治疗腰椎间盘突出症的疗效。方法120例腰椎间盘突出症患者随机分为低温等离子髓核消融术治疗组（A组）．低温等离子髓核消融术＋臭氧治疗组（B组）,每组各60例。比较2组治疗后7d及1．3个月VAS评分及治疗优良率。结果2组术后症状均有不同程度缓解,术后均未发生出血、腰大肌血肿、椎间盘感染、血管神经损伤等并发症。B组术后7d及1,3个月VAS评分低于A组（P〈0．05）;B组术后3个月优良率为96．67％,A组优良率为81．67％．2组比较差异有统计学意义（P％0．05）。结论C型臂x线机引导下低温等离子髓核消融联合盘内注射臭氧,可明显提高腰椎间盘突出症治疗效果。     

胎心基线静止型与胎儿宫内缺氧的关系

目的:探讨足月妊娠胎心基线静止型与胎儿宫内缺氧的关系。方法:选择胎心基线静止型的产妇120例为观察组,胎心基线波浪型的产妇120例为对照组,比较两组产妇分娩过程中羊水情况和新生儿Apgar评分。结果:基线静止型无反应发生率明显高于基线波浪型。基线静止型产程中出现羊水Ⅱ度、Ⅲ度污染和新生儿窒息的机会明显高于基线波浪型。结论:胎心基线静止型提示胎儿储备能力下降,存在胎儿宫内缺氧的可能。