Simultaneous occurrence of peripheral T-cell lymphoma unspecified and B-cell small lymphocytic lymphoma. Report of 2 cases

We report on 2 composite lymphomas occurring in elderly patients, morphologically characterized by the combination of peripheral T-cell lymphoma (PTCL) unspecified and B-cell small lymphocytic lymphoma. Immunohistochemistry provided objective confirmation of the coexistence of the 2 malignancies, as did molecular biology by revealing clonal T-cell receptor gamma and immunoglobulin heavy chain gene rearrangements. One of the patients had no history of indolent lymphoma either at the personal and family level, whereas the other showed a strong familial predisposition, his mother and sister having suffered from B-cell chronic lymphocytic leukemia. Epstein-Barr virus was detected in the PTCL component of 1 case, but was negative in the other. To the best of our knowledge, the simultaneous occurrence of PTCL unspecified and B-cell small lymphocytic lymphoma is an exceptional event; the possible pathogenetic correlations between the 2 neoplasms are discussed.     

新型常压室温等离子体-紫外复合诱变选育埃莎霉素I高产菌株#br#

目的 通过对埃莎霉素Ⅰ产生菌WSJ-IA进行诱变选育研究,以期获得埃莎霉素Ⅰ高产菌株。方法 使用多功能等离子体诱变系统(multifunctional plasma mutagenesis system, MPMS)对出发菌株的孢子进行等离子体和紫外复合诱变,设定不同的诱变时间处理孢子悬液,通过致死率确定合适的诱变条件,利用突变株摇瓶发酵效价筛选出正突变菌株。结果 在MPMS射频功率为100W,处理距离5mm,气体流量12.5SLM,等离子体-紫外辐射时间为50s时,菌株致死率为96.08%。在此诱变条件下,以突变株的初筛效价为指标的突变率、正突变率分别达到63.96%和22.52%,复筛效价是出发菌株1.5倍以上的有5株,占复筛菌株的9%。最终筛选出一株发酵单位比出发菌株提高221%、埃莎霉素Ⅰ组分含量提高192%的正突变株IA-425。42L自动发酵罐发酵结果表明,该菌株埃莎霉素Ⅰ产量达到(2000±200)μg/mL左右。结论 新型等离子体复合紫外诱变方式,可有效提高菌株的埃莎霉素Ⅰ发酵产量和组分含量。这为埃莎霉素Ⅰ的大规模发酵和临床前研究奠定了良好基础。     

磁性纳米粒子复合支架及外加磁场影响成骨作用的研究进展

磁性纳米粒子（MNP）具有独特的磁响应性、生物相容性,在作为生物材料时可通过其内在的微小磁场促进成骨分化。掺入MNP的磁性复合支架保留了MNP的超顺磁性,具有良好的物理机械性能以及生物学性能,在体内外均取得良好的成骨效果。外加磁场可通过影响细胞代谢行为促进骨组织修复,与MNP复合支架结合可起到协同促进骨组织修复再生的作用,在骨组织工程领域的应用潜力巨大。本文就MNP复合支架的性能、MNP复合支架和磁场的成骨作用研究进展作一综述,为MNP复合支架进一步研究和临床应用提供参考。     

高压氧在下肢复合伤中的应用

目的观察下肢复合伤中应用高压氧的效果。方法 82例下肢开放性复合伤患者随机分为两组,均采用手术、清创、皮瓣转移,术后抗生素预防感染的常规治疗,观察组42例在常规治疗基础上加用高压氧治疗,共进行20 d。观察组治疗前后两组患者肌肉组织恢复情况、皮瓣转移存活率和骨折的愈合情况。结果观察组在治疗后局部肿胀消退,无疼痛或轻度压痛患者27例(64.3%),对照组在治疗后局部肿胀消退,无疼痛或轻度压痛患者13例(32.5%),观察组明显优于对照组(P<0.05)。观察组有21例患者行皮瓣转移,存活20例(95.2%),对照组有18例患者行皮瓣转移,存活15例(83.3%),观察组皮瓣转移存活率明显高于对照组(P<0.05)。平均随访12个月,观察组骨折平均愈合时间为4个月,愈合41例,愈合率97.6%;对照组骨折平均愈合时间为6个月,愈合37例,愈合率92.5%.观察组在愈合时间方面明显少于对照组(P<0.05),观察组骨折愈合率明显高于对照组(P<0.05)。结论高压氧治疗可以减轻下肢复合伤炎性反应、提高皮瓣转移存活率和加快骨折愈合。     

复合保温措施对剖宫产产妇围术期低体温和寒战发生的影响

目的 探讨复合保温措施防止剖宫产产妇围术期低体温和寒战发生的作用,为建立围术期患者有效的保温模式提供实验依据.方法 选择健康初产妇120例,将其随机分为对照组（62例）和观察组（58例）,对照组在手术恒温床上施行剖宫产术并采取常规保温方式,观察组在此基础上采取调整手术室温度,静脉输注液、冲洗液和纱布预温,使用强制充气加温毯以及减少身体裸露面积等的复合保温措施;监测产妇入室至手术结束的口腔温度和寒战状况,并进行统计学比较.结果 对照组产妇手术20 min、手术40 min和手术结束时的体温均低于入室时（P＜0.01）,观察组产妇手术20 min、手术40 min和手术结束时的体温与入室时比较,差异无统计学意义（P＞0.05）,且均分别高于同时间点的对照组（P＜0.05）;对照组的低体温发生率显著高于观察组（51.6％ vs 3.4％,P＜0.01）;两组产妇均未发生3、4级寒战,对照组的1、2级寒战发生率显著高于观察组（22.6％vs 3.4％,P＜0.01）.结论 复合保温措施能有效维持剖宫产产妇围术期体温恒定,预防术中低体温和寒战的发生.     

复合补片和生物补片治疗食管裂孔疝的疗效对比研究

目的:对比应用复合补片和生物补片治疗反流性食管炎和食管裂孔疝的疗效。方法:21例应用Crurasoft誖复合补片组及20例应用BiodesignTM Surgisis誖生物补片组修补食管裂孔疝病人,对比分析术后复发率和补片相关并发症发生的差异。结果:两组病人一般情况、食管裂孔长径和手术时间等方面无统计学差异。应用复合补片和生物补片均能使术前反流性食管炎的症状显著缓解。复合补片组和生物补片组围手术期并发症发生率分别为9.5%和30.0%,两组间无统计学差异。术后6个月随访裂孔疝复发率均为0。复合补片组和生物补片组长期随访平均时间分别为(16.3±8.9)个月和(17.3±6.8)个月,解剖性复发率分别为4.8%和5.0%,无统计学差异。两组病人均未发生食管侵蚀的并发症。复合补片组病人术后吞咽困难发生率高于生物补片组(38.1%比20..0%),但无统计学差异。结论:应用新一代小肠黏膜下基质补片和复合补片修补食管裂孔疝后疗效满意,复发率低,补片相关的严重并发症发生率差异无统计学意义。     

Free thoracodorsal,perforator-scapular flap based on the angular artery (TDAP-Scap-aa): Clinical experiences and description of a novel technique for single flap reconstruction of extensive oromandibular defects

PurposeThe reconstruction of oromandibular defects can be challenging, particularly when considerable amounts of bone and soft tissues are lost. In such cases, the use of a single flap may be unsatisfactory and a concomitant free flap is needed. Here we present a chimeric, thoracodorsal perforator-scapular free flap based on the angular artery of the subscapular system (TDAP-Scap-aa) as an alternative technique for single flap reconstruction of extensive oromandibular defects.Materials and methodsThe authors studied patients who underwent reconstructions of extensive oromandibular defects with a TDAP-Scap-aa free flap. The operative technique and the clinical experiences are described. Postoperatively, surgical complications were classified with the Clavien-Dindo Classification.ResultsFive male patients (59.4 ± 8.8 years) were treated with the TDAP-Scap-aa. Average sizes for harvested hard and soft tissue components, which are both included in the flap and completely independently from each other, were 10.4 ± 1.5 cm of bone length, 2.6 ± 0.3 cm of bone height, 11.6 ± 4.8 cm of skin paddle length and 8.4 ± 1.7 cm of skin paddle width. The overall mean operation time (cut-suture) was 14.6 ± 0.9 h. The postoperative follow-up was 6 months. No complications requiring surgical treatment as well as donor site nerve damages were observed.ConclusionsIn comparison to other double free flaps, the TDAP-Scap-aa offers several advantages such as higher amounts of hard and soft tissues without prolonged operation times, and provides satisfying aesthetic outcomes and little donor site morbidity due to the preservation of muscle and nerve structures. Therefore, the TDAP-Scap-aa constitutes a clinically reliable alternative in extensive oromandibular defect reconstruction.     

Exothermic properties of plaster–synthetic composite casts

Purpose

Plaster casts can cause burns. Synthetic casts do not. Composite plaster–synthetic casts have not been thoroughly evaluated. This study analyzed the temperature from plaster casts compared with composite casts in a variety of in vitro conditions that would simulate clinical practice.

Methods

A Pyrex cylinder filled with constant body temperature circulating water simulated a human extremity. Circumferential casts, of either plaster or composite construction (plaster inner layer with outer synthetic layer), were applied to the model. Peak temperatures generated by the exothermic reactions were studied relative to the following variables: dip water temperature (24 °C versus 40 °C), cast thickness (16, 30, and 34 ply), and delayed (5-min) versus immediate application of the synthetic outer layers. Peak temperatures from the all-plaster casts were compared with the composite casts of the same thickness. Finally, the relative cast strength was determined.

Results

Potentially dangerous high temperatures were measured only when 40 °C dip water was used or when thick (30- or 34-ply) casts were made. Cast strength increased with increasing cast thickness. However, the presence of synthetics in the composite casts layers did not increase cast strength in every case.

Conclusion

When applying composite casts, the outer synthetic layers should be applied several minutes after the plaster to minimize temperature rise. Composite casts do not routinely generate peak temperatures higher than plaster casts of similar thickness. Because the skin of children and the elderly is more temperature-sensitive than average adult skin, extra care should be taken to limit the exothermic reaction when casting children and the elderly: clean, room temperature dip water, minimal required cast thickness, avoidance of insulating pillows/blankets while the cast is drying.     

美塑ENA HRi树脂在前牙美学修复中的临床观察

目的 观察美塑ENA HRi美学修复体系在修复前牙Ⅳ类洞的临床疗效.方法运用美塑ENA HRi美学修复体系,直接填充修复32例患者42颗前牙Ⅳ类洞.修复后3、6、12个月时,采用美国公共健康部制定的评定系统标准,对其保存率、色泽协调性、牙髓活力、边缘适合性及边缘着色等指标进行临床评价.结果 各项评价指标在术后3、6、12个月时,差异无统计学意义（P ＞0.05）.结论美塑ENA HRi美学修复体系用于前牙Ⅳ类洞修复,可以获得满意的临床修复效果.     

复合凝乳酶胶囊治疗儿童功能性消化不良临床研究

目的 观察使用复合凝乳酶胶囊治疗儿童功能性消化不良的效果及药物的安全性.方法 采用多中心、随机开放的临床试验方法,纳入2012年2月至2013年3月广东省4家三级甲等医院门诊收治的符合罗马Ⅲ标准诊断为功能性消化不良的患儿,观察并比较治疗1周及2周的总症状积分变化及药物相关不良反应,治疗效果根据总症状积分下降程度分为显效、有效及无效;并以疗效相差大于10％为优效标准对治疗1周及2周的有效性做非劣检验.结果 共有201例患儿纳入观察,196例完成2周治疗.治疗2周显效率、总有效率分别为68.88％、87.76％,明显高于治疗1周的显效率(27.04％)和总有效率(76.02％)(U=2.935,P＜0.05).治疗2周后和1周后症状积分改善率的差值、症状积分下降的差值及显效率变化差值的95％可信区间(95％ CI)下限均大于10％,治疗2周疗效优于治疗1周疗效.试验期间未见明显药物相关不良反应.结论 服用复合凝乳酶胶囊治疗消化不良对各症状改善明显.治疗2周较治疗1周的效果明显,无明显不良反应.