A technique for periorbital syringomas: intralesional radiofrequency ablation

AIM: To evaluate the efficacy of intralesional radiofrequency ablation in the treatment of periorbital syringomas. METHODS: We tried the intralesional radiofrequency ablation for 64 patients with periorbital syringomas from 2007 to 2011. The operation was performed under 2.5 loupe magnifications. The handpiece was assembled with a needle electrode and connected to the radiofrequency ablation apparatus. The electrode was then inserted into the target lesions in dermis and delivering injury to the base of these tumors. Results were assessed clinically by comparing pre- and post-treatment photographs and patient satisfaction rates. RESULTS: Clinical improvement increased with each subsequent treatment session. The percent of patients whose clinic improvement grade were≥3 after each session was respectively 71.9%(Session1), 83.3%(Session2), and 100%(Session3). The statistical results indicated the concordance of the clinical assessment and the satisfaction level of patients (kappa=0.78 of the session1; kappa=0.82 of the session2). The majority of patients had good or excellent cosmetic results. Postoperatively, there were no permanent side effects or recurrences. CONCLUSION: As a new technique of minimally invasion, the intralesional radiofrequency ablation was found to be an effective, inexpensive, highly precise and safe way of treating periorbital syringomas.     

应用微波与激光治疗子宫颈糜烂的对比观察

将３００例慢性宫颈炎妇女随机分为微波组和激光组，分别采用微波组织凝固和ＣＯ＿２激光汽化进行治疗。结果：微波治疗宫颈糜烂一次治愈率９２．２０％（１４２／１５４），ＣＯ＿２激光一次治愈率７９．４５％（１１６／１４６）。两组治疗结果比较，差异有非常显著意义（Ｐ＜０．００５）。两组治疗后的不良反应大致相同，术中出血的发生率，微波组３．２５％（５／１５４），明显低于激光组２１．９２％（３２／１４６），差异有非常显著意义（Ｐ＜０．００５）。研究结果表明：微波组织凝固技术治疗宫颈糜烂一次治愈率高，术中止血效果好，操作简单，有实用价值。     

左炔诺孕酮宫内缓释系统与热球子宫内膜去除术治疗月经过多的疗效比较

目的评价左炔诺孕酮宫内缓释系统（LNG—IUS）与热球子宫内膜去除术（TBA）治疗月经过多的近期和远期疗效及安全性。方法将77例月经过多患者采用随机数字表法分为LNG—IUS组（39例）和TBA组（38例）,治疗后随访36个月,观察两组患者的疗效、血红蛋白（Hb）、性激素水平、安全性及卫生经济学指标。结果①LNG—IUS组患者治疗前月经失血图（PBAC）评分和经期分别是（258．32±72．75）分和（10．90±2．37）d,治疗后3、6个月分别是（76．10±21．26）分、（9．52±1．61）d和（61．62±17．27）分、（8．32±1．33）d;TBA组治疗前分别是（254．89±67．18）分和（11．19±2．11）d,治疗后3、6个月分别是（58．94±44．09）分、（9．52±1．61）d和（52．83±31．56）分、（8．32±1.33）d,两组治疗前后比较,差异均有统计学意义（P〈0．05）;且LNG—IUS组治疗后12、24及36个月PBAC评分和经期少于TBA组（P〈0．05）。②LNG—IUS组和TBA组患者治疗后6个月Hb分别是（111．68±7．58）g／L和（114．22土6．22）g／L,均较治疗前[（87．90±6．42）g／L及（88．50±5．60）g／L）]明显升高（P〈0．05）,但与治疗后12个月Hb[（116．16±4．29）g／L,（114．16±4．32）g／L）]比较,差异无统计学意义（P〉0．05）。③两组患者治疗前及治疗后6、12个月性激素水平无明显变化（P〉0．05）。④LNG—IUS组和TBA组治疗后6个月阴道不规则出血率分别为72．41％（21／29）和13．89％（5／36）,两组比较,差异有统计学意义（P〈0．05）。两组阴道排液率分别为10．34％（3／29）和44．44％（16／36）,两组比较,差异有统计学意义（P〈0．05）。两组均无大出血、宫腔积脓等并发症。结论LNG—IUS与TBA均可有效改善月经过多,纠正贫血,且安全、简单易行;TBA治疗月经过多的近期疗效较LNG—IUS确切,依从性更好。     

双极射频消融治疗心房纤颤的临床研究

目的对心内直视下双极射频消融治疗心房纤颤(Atrial fibrillation,AF)的临床疗效进行总结及分析。方法回顾性分析在心内直视下瓣膜置换同期行双极AF射频消融术病例219例,术前行心电图及超声心动图了解心律及心功能指标。术中射频消融路线相同,术后定期复查心电图并口服胺碘酮半年,随访半年以上,行心电图出现窦性P波则表明转律成功。结果围手术期死亡5.48%(12/219),出院时窦性心律(Sinus rhythm,SR)79.00%(173/219),非SR 15.53%(34/219)。出院后随访6~58个月,平均(27.96±15.57)个月,随访率83.57%(173/207),失访率16.43%(34/207),随访期间死亡1.73%(3/173),维持SR 89.02%(154/173),非SR 10.98%(19/173)。单因素分析示左房内径(Left atrial diameter,LAD)、年龄及高血压病是影响术后转复的危险因素(P<0.05)。结论心内直视下瓣膜置换同期射频消融治疗AF安全、有效,LAD大、年龄大及高血压病可降低术后转复率。     

射频消融治疗室上性心动过速的疗效

目的研究分析射频消融治疗室上性心动过速的疗效及不良反应。方法回顾性分析我院2009年1月至2011年12月我院收治的52例射频消融治疗室上性心动过速的患者资料,观察患者的治疗效果和不良反应。结果 52例患者成功率为100%,其中旁道参与的室上性心动过速患者28例,成功28例;房室结折返心动过速24例,成功24例。手术后并发症发生1例,随访半年中,有2例复发。结论射频消融治疗室上性心动过速的疗效较好,技术先进,损伤小,手术后不良反应少,复发率低,值得在临床应用。     

非折返房性心动过速P波形态的定位诊断

目的:通过分析房性心动过速(房速)时心电图P波形态特征判定房速起源。方法:对37例成功行单靶点消融治疗的房速患者的P波形态和参数与消融靶点进行对比分析。计算房速时PR与PP间期比值(PRI)评价激动在房室结传导的时程变化;计算P波与PR间期的比值(PCI)评价激动在房内传导的变化。结果:29例靶点位于右房,8例位于左房。左房房速在下壁导联P波振幅显著增高。右房后壁的PR(I0.52±0.05)数值在各部位中最大,无冠窦、冠状窦口和右房侧壁的PCI(0.24±0.04)值最小。结论:aVL和V1导联P波形态对区分左房和右房房速具有重要的临床意义,Ⅱ、Ⅲ、aVF导联可为起源点位于心房上下提供线索,PRI、PCI有助于房速起源的判定。     

Sub-Threshold Fabrication of Laser-Induced Periodic Surface Structures on Diamond-like Nanocomposite Films with IR Femtosecond Pulses

In the paper, we study the formation of laser-induced periodic surface structures (LIPSS) on diamond-like nanocomposite (DLN) a-C:H:Si:O films during nanoscale ablation processing at low fluences—below the single-pulse graphitization and spallation thresholds—using an IR fs-laser (wavelength 1030 nm, pulse duration 320 fs, pulse repetition rate 100 kHz, scanning beam velocity 0.04–0.08 m/s). The studies are focused on microscopic analysis of the nanostructured DLN film surface at different stages of LIPSS formation and numerical modeling of surface plasmon polaritons in a thin graphitized surface layer. Important findings are concerned with (i) sub-threshold fabrication of high spatial frequency LIPSS (HSFL) and low spatial frequency LIPSS (LSFL) under negligible surface graphitization of hard DLN films, (ii) transition from the HSFL (periods of 140 ± 30 and 230 ± 40 nm) to LSFL (period of 830–900 nm) within a narrow fluence range of 0.21–0.32 J/cm², (iii) visualization of equi-field lines by ablated nanoparticles at an initial stage of the LIPSS formation, providing proof of larger electric fields in the valleys and weaker fields at the ridges of a growing surface grating, (iv) influence of the thickness of a laser-excited glassy carbon (GC) layer on the period of surface plasmon polaritons excited in a three-layer system “air/GC layer/DLN film”.     

Ablación de taquicardia ventricular asistida con ECMO. Primera experiencia en nuestra institución

Catheter ablation is useful for reducing drug refractory ventricular tachycardia (VT) episodes and can be life-saving when VT is incessant or arrhythmic storm. Left ventricular hemodynamic support may be required in patients with VT and hemodynamic instability. Extracorporeal membrane oxygenation (ECMO) support is an alternative to achieve ventricular tachycardia mapping and ablation over long periods of time. We present a case of successful catheter ablation of substrate in a patient with ischemic heart disease and ventricular tachycardia with hemodynamic instability performed using venous- arterial ECMO support. There were not episodes of ventricular tachycardia after 2 years of follow-up.     

特发性室性心动过速的导管射频消融治疗效果

目的 评价导管射频消融(radiofrequency catheter ablation,RFCA)对特发性室速(idiopathic ventricular tachy-cardia,IVT)的治疗效果以及心电图对消融靶点的定位价值.方法 对126例特发性室速患者的电生理资料及RFCA治疗效果进行回顾性分析.多数患者采用激动顺序标测,射频能量采用温控法(60～65℃).结果 126例患者中右室流出道(right ventricular outflow tract,RVOT)IVT 62例、左后间隔IVT 43例,其他部位IVT 21例.本组RFCA的总成功率为87.3%,RVOT-IVT和左后间隔IVT的成功率显著高于其他部位IVT(96.8%和90.7% vs 52.4%,P<0.05).本组8例患者存在发作性晕厥(发作的R-R间期230～260 ms),其中4例合并房室结双径路、2例合并隐匿性房室旁道、2例合并多形性室速.随访6个月至10年,复发9例(复发率为8.2%),均再次RFCA成功.合并心动过速性心肌病者6例,术后3个月心脏大小与心功能均恢复正常.结论 采用激动顺序标测法RFCA治疗IVT成功率高;室速发作时体表心电图对绝大多数室速起源具有定位价值;部分室速可能合并房室旁道或房室结双径路.     

Copper Biology in Health and Disease: Recent advances in copper analyses by inorganic mass spectrometry

Copper (Cu) participates in the biological redox reaction in the body, and its deficiency is fatal to the body. At the same time, Cu is extremely toxic when it exists in excess. Thus, the body has to tightly and spatiotemporally regulate the concentration of Cu within a physiological range by several groups of Cu-regulating proteins. However, entire mechanisms underlying the maintenance of Cu homeostasis in body and cells have not fully understood. It is necessary to analyze Cu itself in a body and in a cell to reveal the Cu homeostasis. In this review, recent advances in the analytical techniques to understand the Cu metabolism such as speciation, imaging and single-cell analysis of Cu were highlighted.