Waterproof cast liners in paediatric forearm fractures: a randomized trial

Purpose

Waterproof casts have been shown to provide adequate support and immobilization in fractures. This study evaluated two waterproof cast liners, namely, Wet or Dry^® and Delta Dry^®, in terms of ease of application/removal, durability, longevity, and patient satisfaction using patient- and technician-reported outcome measures.

Methods

A total of 105 children were enrolled in a randomized trial and received a below-elbow synthetic cast with either of the two cast liners.

Results

The two groups were comparable with regards to age, gender, side of cast, and hand dominance. Assessment was carried out at application and removal. In the patient-reported outcomes, the Wet or Dry^® group was rated significantly better in the odor and water resistance categories. In the technician-reported application and removal outcome measures, the Delta Dry^® group was rated significantly higher.

Conclusions

The use of waterproof cast liners appears to be safe in children with forearm fractures, with some differences in outcome between the two products trialed.     

UF-500i与IQ200尿沉渣分析仪检测管型的比较和评价

目的比较UF-500i与IQ200尿沉渣分析仪在检测管型中的敏感度、特异度和影响因素。方法采用UF-500i、IQ200尿沉渣分析仪和离心沉淀显微镜法分别检测门诊肾病患者晨尿标本,以人工镜检法作为标准对两种仪器敏感度、特异度进行分析。结果480份晨尿标本中,UF-500i尿沉渣分析仪敏感度为97．1％（68／70）,特异度为76．6％（314／410）;IQ200尿沉渣分析仪人工修饰前后敏感度分别为91．4％、100％（64／70,70／70）,特异度为70．5％／98．3％（289／410,403／410）。结论UF-500i与IQ200尿沉渣分析仪具有较高的管型检测灵敏度,但假阳性率高,均需人工复核以提高准确性。     

玻璃纤维桩及Ipse.max全瓷冠联合修复前牙的护理干预

目的探讨玻璃纤维桩及Ipse.max全瓷冠联合修复前牙中的护理体会。方法对60例采用玻璃纤维桩及Ipse.max全瓷冠联合修复前牙的患者,对其修复治疗过程实施有效的干预及修复后的维护指导。结果患者满意度高,修复效果好。结论实施有效的护理干预是玻璃纤维桩及Ipse.max全瓷冠联合修复前牙治疗成功的关键。而且完成修复后的定期维护和对患者的口腔健康教育也是影响最终修复效果的重要因素。     

胎儿鼻粘膜微血管铸型扫描电镜观察

用８例足月胎儿，通过树脂复型技术，铸造下鼻甲及鼻中隔粘膜微血管结构，进行扫描电镜观察．结果显示鼻粘膜血管呈现清晰的三维构型，可见下列四种血管成份：粘膜固有层毛细血管网、腺体周围毛细血管网、海绵状血窦及位近骨膜的小动、静脉．本研究对于了解鼻粘膜的微循环具有一定价值．     

A new automated method versus continuous positive airway pressure method for measuring pressure-volume curves in patients with acute lung injury

Objective  To compare pressure–volume (P–V) curves obtained with the Galileo ventilator with those obtained with the CPAP method in patients with acute lung injury (ALI) or acute respiratory distress syndrome (ARDS). Design  Prospective, observational study. Setting  General critical care center. Patients and participants  Patients with ALI/ARDS and receiving mechanical ventilation. Interventions  Pressure–volume curves were obtained in random order with the CPAP technique and with the software PV Tool-2 (Galileo ventilator). Measurements and results  In ten consecutive patients, airway pressure was measured by a pressure transducer and changes in lung volume were measured by respiratory inductive plethysmography. P–V curves were fitted to a sigmoidal equation with a mean R ² of 0.994 ± 0.003. Intraclass correlation coefficients were all >0.75 (P < 0.001 at all pressure levels). Lower (LIP) and upper inflection (UIP), and deflation maximum curvature (PMC) points calculated from the fitted variables showed a good correlation between methods with intraclass correlation coefficients of 0.98 (0.92, 0.99), 0.92 (0.69, 0.98), and 0.97 (0.86, 0.98), respectively (P < 0.001 in all cases). Bias and limits of agreement for LIP (0.51 ± 0.95 cmH₂O; −1.36 to 2.38 cmH₂O), UIP (0.53 ± 1.52 cmH₂O; −2.44 to 3.50 cmH₂O), and PMC (−0.62 ± 0.89 cmH₂O; −2.35 to 1.12 cmH₂O) obtained with the two methods in the same patient were clinically acceptable. No adverse effects were observed. Conclusion  The PV Tool-2 built into the Galileo ventilator is equivalent to the CPAP method for tracing static P–V curves of the respiratory system in critically ill patients receiving mechanical ventilation. Electronic supplementary material  The online version of this article (doi:) contains supplementary material, which is available to authorized users.     

Evaluation of blood purification and bortezomib plus dexamethasone therapy for the treatment of acute renal failure due to myeloma cast nephropathy

Aggressive removal of circulating free light chains (FLC) by blood purification accompanied by chemotherapy is a promising approach for the treatment of acute renal failure due to myeloma cast nephropathy. Plasma exchange has been performed to remove serum FLC; in order to examine an alternative strategy we performed hemodiafiltration using protein-leaking dialyzers for the treatment of dialysis-dependent acute renal failure due to myeloma cast nephropathy. In the first case with κ-light chain cast nephropathy, the pre-treatment serum creatinine was 9.65 mg/dL, and the serum κ-FLC was 27100 mg/L. Plasma exchange or hemodiafiltration was performed from Monday to Friday during the first several weeks. Chemotherapy was started with high-dose dexamethasone and then switched to bortezomib plus dexamethasone. The mean removal rates of κ-FLC were 45.8% (one plasma volume) and 66.9% (one-and-a-half plasma volumes) by plasma exchange. The removal rates of κ-FLC by hemodiafiltration (66.9%, FB210UHβ; 71.6%, PES210Dα; 75.2%, FXS220) were comparable to those by plasma exchange. In the second case with λ-light chain cast nephropathy, the pre-treatment serum creatinine was 4.14 mg/dL, and the serum λ-FLC was 4140 mg/L. The mean removal rates of λ-FLC were 60.2% (FXS140) and 64.2% (FB210UHβ) by hemodiafiltration. Both cases became dialysis-independent. The combination of an intense blood purification regimen and bortezomib plus dexamethasone therapy appears to be an efficient approach to renal recovery. Hemodiafiltration using protein-leaking dialyzers could become an alternative to plasma exchange as a method of removing FLC.     

经皮经肝胆道镜治疗肝移植术后胆管铸型的安全性及其临床价值观察

目的评价经皮经肝胆道镜治疗肝移植术后胆管铸型的安全性及其临床价值。方法回顾2008年4月至2010年1月间采用经皮经肝胆道镜治疗的11例肝移植术后胆管铸型患者的临床资料,对治疗情况及随访结果进行分析总结。结果11例肝移植术后胆管铸型患者中,1例铸型分布于胆总管内,3例局限于右肝内胆管,4例局限于左肝内胆管,其余3例呈肝内外胆管弥漫分布。11例患者共接受了68例次的经皮经肝胆道镜治疗,其中10例（90．9％）治疗效果良好,肝功能示转氨酶、胆红素等值较治疗前明显降低,余1例因夹闭引流管后偶有发热,给予更换细管长期带管。无一例患者发生胆瘘以及难以控制的出血等严重并发症,只有1例治疗过程中发生瘘道部分断裂,所有患者术后随访10～30个月,1例在随访过程中因其他疾病死亡,其余患者状况良好。结论经皮经肝胆道镜治疗肝移植术后胆管铸型是一种安全、有效的方法,具有较好的应用价值,可在临床上推广应用。     

全自动尿沉渣分析仪检测管型的影响因素分析

目的 探讨全自动尿沉渣分析仪检测管型的影响因素.方法 用UF1000、科宝XS、人工显微镜检查(人工镜检)三种方法对137例肾病患者尿液进行管型测定分析比较.结果 以人工镜检为标准,UF1000测定管型的假阳性率为35.1%,科宝XS的假阳性率为22.3%,UF1000与科宝XS的测定结果与人工镜检法比较差异均具有统计学意义(P<0.05),黏液丝、上皮细胞等因素可干扰全自动尿沉渣分析仪对管型的测定结果.结论 全自动尿沉渣分析仪只能作为测定管型的筛查试验,遇管型阳性结果时,必须用人工显微镜检测复核.     

In vitro investigations on retention force behavior of conventional and modern double crown systems

ObjectiveThis study aimed to investigate the effects of long-term use on the retention force and wear behavior of double crown systems.MethodsBased on a common double crown design sixty pairs of telescopic crowns were fabricated and divided into six groups, each consisting ten samples: “Gold standard” cast gold alloy primary and secondary crown (GG) and cast non-precious alloy (NN), computer-aided design (CAD)/computer-aided manufacturing (CAM)-milled zirconia primary crown and galvanoformed secondary crown (ZG), CAD/CAM-milled non-precious alloy primary and secondary crown (CC NN), CAD/CAM-milled zirconia primary crown and non-precious alloy secondary crown (CC ZN) and CAD/CAM-milled zirconia primary crown and polyetheretherketone (PEEK) secondary crown (CC ZP). In the constant presence of artificial saliva, all samples were subjected to 10,000 joining-separation cycles at a velocity of 120 mm/min. Wear was analyzed by reflected light microscopy and confocal microscopy before and after artificial aging.ResultsRetention force losses were observed in each group after long-term use, with significant losses in the groups ZG and CC ZP (p_ZG = 0.01, p_{CC ZP} = 0.049). During artificial aging, no significant differences in pull-off force were recorded for groups GG, NN and CC ZN. Regarding wear, merely the Y-TZP primary crowns of the CC ZP group displayed no surface changes.SignificanceAll tested production methods and material combinations seem to be suitable for clinical practice. CAD/CAM technology allows similarly predictable results to be achieved as the gold standard. Confocal microscopy is recommended for surface examinations of double crowns.     

Minimal tooth preparation for posterior monolithic ceramic crowns: Effect on the mechanical behavior,reliability and translucency

ObjectiveDespite the increased use of monolithic crowns, their performance has yet to be determined when the minimal tooth preparation (MTP) principle is considered. The goal of this study was to evaluate the effect of MTP on the mechanical behavior, reliability and translucency of posterior monolithic ceramic crowns.MethodsDentin analogues were machined using two preparation designs (0.5 or 1 mm reduction) to receive first molar crowns in order to evaluate the monolithic crown performance. Next, 126 crowns were divided (21/g) according to the material (High translucent zirconia – YZHT, Zirconia reinforced lithium silicate – ZLS and Hybrid ceramic – HC) and thickness (0.5 or 1 mm). Tensile stress concentration was calculated using the finite element method. The crowns were adhesivelly cemented and step stress fatigued to calculate reliability for missions at 600 and 1000 N. Translucency was analyzed in 10 discs of each material and thickness.ResultsHigher stress concentration was found in thinner crowns and those with higher elastic modulus. YZHT crowns were suspended when fatigue reached 1500 N load, thus 1-parameter Weibull was used to analyze the data. Reliability was only affected by thickness at 1000 N. ZLS.5 showed lower survival than HC.5, which was similar to the groups that presented 100% survival. YZHT showed the highest strength and data scattering. ZLS1 (22.3 ± 1.4) presented higher translucency than HC1 (19.2 ± 0.6) and YZHT1 (12.0 ± 2.9), whereas ZLS.5 and HC.5 were similar to each other (26.5 ± 2.3, 26.7 ± 2.2) and superior to YZHT.5 (12.7 ± 1.2).SignificanceHC.5 combined high reliability and translucency with low stress concentration, yielding better crown performance and tooth preservation.