Eur Radiol:标准化经皮微波消融术治疗肺肿瘤

2021-02-24 shaosai MedSci原创

经皮热消融术一项相对较新的技术,其设备设计和性能的差异性更大,用于治疗计划的决策程序更加复杂,并且预期的消融尺寸与任何探头相关特征之间的相关性均较小。

   经皮热消融术已成为治疗原发性早期或转移性肺部肿瘤的安全有效的区域手术替代疗法及立体定向放射疗法(SBRT)。在过去的十年中,微波消融术(MWA)越来越被人们认识和使用,部分取代了射频消融术(RFA)在许多解剖区域的治疗。但是,与RFA相比,MWA是一项相对较新的技术,其设备设计和性能的差异性更大,用于治疗计划的决策程序更加复杂,并且预期的消融尺寸与任何探头相关特征之间的相关性均较小。所有这些导致了MWA治疗方案中缺乏标准化。


      近日,发表在European Radiology杂志的一项研究前瞻性地评估了MWA术治疗不可切除的原发性和继发性肺肿瘤的重复性、安全性和有效性,为建立标准化MWA治疗方案提供了新的参考标准。

   

 本研究为一项多中心前瞻性临床试验,纳入的患者均患有无法手术切除的原发性和转移性肺部肿瘤且肿瘤直径在4 cm以内,每位患者均接受CT引导下的MWA治疗。根据目标肿瘤大小和组织学进行分类,并使用预定义的MW功率和持续时间设置进行治疗。对每位患者进行了长达24个月的随访。评估了治疗的安全性、有效性和可重复性。在CT扫描中测量消融体积,并与使用相同治疗条件下在离体牛肝上获得的消融体积进行比较。

    从2015年9月至2017年9月,共有54例患者进行了69次MWAs手术,且所有病例均获得技术上的成功,61例(88.4%)手术在没有偏离标准方案的情况下完成治疗。MWA术后即刻CT扫描显示,消融尺寸比体外模型小约25%;然而,在消融后1个月观察到治疗区域的体积显著增加(40%)。无治疗相关死亡或并发症的记录。在MWA术后48小时CT扫描上,同等功率和持续时间的治疗产生了相当地可重复的消融尺寸。与体外肝脏模型相比,体内消融尺寸系统性地缩小了约25%。总体LPR为24.7%,TLP平均为8.1个月。12个月和24个月的OS率分别为98.0%和71.3%。

表1 局部肿瘤进展率(LPR)

图1 MALT1患者和MALT2患者的总生存期(OS,左)和局部无进展生存期(LPFS,右)的Kaplan-Meier曲线

    CT引导下的经皮MWA术是一种可重复、安全、有效的治疗直径4cm内的肺恶性肿瘤的方法。


原始出处:

Roberto Iezzi,Roberto Cioni,Domenico Basile,et al. Standardizing percutaneous Microwave Ablation in the treatment of Lung Tumors: a prospective multicenter trial (MALT study).DOI:10.1007/s00330-020-07299-2

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JCLA:在维生素D不足和维生素D补充个体中评估重新设定的标准化测试方法

最近,Abbott Diagnostics已对NIST SRM 2972​​的Architect 25(OH)D测试重新进行了标准化。研究人员在维生素D缺乏个体维生素D 3补充前后,评估了标准化Architect 25(OH)D测试的分析和临床表现,并将其性能与NIST可溯源液相色谱-串联质谱法(LC-MS / MS)和罗氏总25(OH)D检测。 从88名健康受试者获得具有自我感知疲劳和维