Parallel angioplasty dilatation catheter and guide wire: A new technique for the dilatation of calcified coronary arteries

Percutaneous transluminal coronary angioplasty (PTCA) of heavily calcified rigid coronary arteries has decreased success and increased complication rates. Three cases are presented describing a new technique for the dilatation of severely calcified coronary arteries that were not dilatable by conventional angioplasty methods. This technique involves the use of a balloon dilatation catheter system parallel to a guide wire. © 1993 Wiley-Liss, Inc.     

A SLAP lesion associated with calcific tendinitis of the long head of the biceps brachii at its origin

Calcific tendinitis is a common condition with characteristic clinical and radiological findings. Although we do not know which condition initiated the pathologic cascade, we present a rare case of calcific tendinitis of the long head of the biceps brachii at its origin, associated with a SLAP lesion. The calcium deposit was removed and the SLAP lesion was repaired with a suture anchor arthroscopically.     

钙化牙本质中神经分布的研究

目的：研究牙本质神经的分布,为牙本质的感觉机制寻找组织学的基础。方法：用健康、发育成熟、新鲜的离体人恒牙做标本。经过EDTA脱钙制成切片。先行染色,后采用光学显微镜及透射电镜进行观察。结果：发现神经纤维及其末梢分布于钙化本质全层,直至釉牙本质界,近表面神经末特别密集。其末梢在光镜下呈结节状或串珠状。电镜下见该结节是神经微纤维分散到组织中,或两末梢的相互吻合。结论：牙本质神经分布的研究结果为牙本质感觉的神经机制学说找到了组织学的基础。     

正常冈上肌腱乏血管区胶原分布的图像分析研究

目的 运用计算机图像分析方法研究正常冈上肌腱胶原分布的规律,以探讨胶原分布与冈上肌腱撕裂之间的联系。方法 动用组织化学及免疫组织化学方法染色获得的正常冈上肌腱切片标本,分为２组,即：距冈上肌腱止点１ｃｍ处为一组（Ａ组）,２ｃｍ处为另一组（Ｂ组）;并用计算机图像分析系统检测肌腱横切面上胶原所占面积百分比,所得数据用Ｓｐｓｓ８．０作统计学处理。结果 Ｍａｓｓｏｎ三重染色的切片中,Ａ组胶原所占横截面积百     

Multiple calcifying fibrous pseudotumors of the pleura: ultrastructural analysis provides insight on mechanism of dissemination

ABSTRACT

Calcifying fibrous pseudotumor (CFP) is a rare, benign soft tissue tumor that may uncommonly arise in the pleura. These tumors can show multifocal dissemination across the pleural surface, but the mechanism underlying this dissemination is unclear. Review of previously reported cases of pleural CFP demonstrates a strong predilection for basal and diaphragmatic pleural surfaces, and a significantly higher rate of multifocality compared with other locations. We present a 59-year-old male with multiple CFP of the pleura. Reactive-appearing adhesions spanning the pleural surfaces were present, and by electron microscopy, were involved by tumor. We suggest this is the likely mode of dissemination across the pleural surfaces.     

The Significance of Calcified Fibrocartilage on the Cortical Endplate of the Translational Sheep Spine Model

To gain an understanding of the vertebral cortical endplate and factors that may affect the ability to achieve skeletal attachment to intervertebral implants and fusion, this study aimed to characterize the hypermineralized tissue on the cortical endplate of the vertebral body on a commonly used animal model. Skeletally mature sheep were injected with tetracycline prior to euthanasia and the C2‐C3, T5‐T6, and L2‐L3 spinal motion segments were excised and prepared. Vertebral tissues were imaged using backscatter electron (BSE) imaging, histology, and tetracycline labeling was used to assess bone remodeling within different tissue layers. It was determined that the hypermineralized tissue layer was calcified fibrocartilage (CFC). No tetracycline labels were identified in the CFC layer, in contrast to single and double labels that were present in the underlying bone, indicating the CFC present on the cortical endplate was not being actively remodeled. The average thickness of the CFC layer was 146.3 ± 70.53 µm in the cervical region, 98.2 ± 40.29 µm in the thoracic region, and 150.89 ± 69.25 µm in the lumbar region. This difference in thickness may be attributed to the regional biomechanical properties of the spine. Results from this investigation indicate the presence of a nonremodeling tissue on the cortical endplate of the vertebral body in sheep spines, which attaches the intervertebral disc to the vertebrae. This tissue, if not removed, would likely prevent successful bony attachment to an intervertebral device in spinal fusion studies and total disc replacement surgeries. Anat Rec, 296:736–744, 2013. © 2013 Wiley Periodicals, Inc.     

Treatment of calcified coronary artery lesions

Heavily calcified coronary plaques represent a complex lesion subset and a challenge to the interventional cardiologist, as they are often resistant to simple plaque modification with conventional balloon angioplasty. Inadequate plaque modification can lead to stent underdeployment, which itself predisposes to in-stent restenosis and stent thrombosis. Over the years, a number of mechanical devices ranging from modified angioplasty balloons to atherectomy devices have become available in order to tackle such lesions. Here we review these devices concentrating on the evidence behind their use.     

基于MRI针刀治疗冈上肌肌腱炎的临床随机对照研究

目的:观察基于MRI针刀治疗冈上肌肌腱炎的临床疗效。方法:将72例冈上肌肌腱炎患者随机分为治疗组和对照组,每组36例。治疗组采用针刀治疗,对照组采用电针治疗,观察周期为2周。评价两组患者的临床疗效,比较两组患者的疼痛视觉模拟量表(VAS)评分及疼痛弧试验阳性率的变化。结果:治疗后,治疗组的总有效率为91.2%,对照组为84.8%,治疗组的疗效优于对照组(P0.05)。治疗后,两组患者的VAS评分均显著降低(P0.01),且治疗组患者的评分低于对照组(P0.01);两组患者的疼痛弧试验阳性率均显著降低(P0.01),治疗组患者的疼痛弧试验阳性率为17.65%,对照组为27.27%,但两组比较差异无统计学意义(P0.05)。结论:基于MRI针刀治疗冈上肌肌腱炎具有较好的疗效,可明显缓解患者的疼痛症状,改善患者的体征。     

脂蛋白(a)与钙化性主动脉瓣疾病的研究进展

钙化性主动脉瓣疾病是常见的心血管疾病,随着人口老龄化的日益加剧其逐渐成为主要的医疗负担。瓣膜置换术是该病的主要治疗方法,但高龄群体手术风险较大,并发症发生率高。且目前仍缺少预防或减缓疾病进展的有效药物。研究发现,脂蛋白(a)在瓣膜钙化的病理过程中起关键作用,脂蛋白(a)水平升高是钙化性主动脉瓣疾病的重要危险因素,显著增加主动脉瓣狭窄的患病风险。本文综述了脂蛋白(a)在钙化性主动脉瓣疾病的病理机制中的作用及其与治疗方面的相关性。