An immunocytochemical study of the germinal layer vasculature in the developing fetal brain using Ulex europaeus 1 lectin

The characteristics of the germinal matrix vasculature were studied in the developing fetal brain using immunocytochemical methods. A preliminary comparative immunocytochemical study was made on six fetal brains to compare endothelial staining by Ulex europaeus I lectin with that of antibody to Factor VIII related antigen. Ulex was found to stain germinal layer vessels better than Factor VIII related antigen. Subsequently, the germinal layers of a further 15 fetal and preterm infant brains ranging from 13 to 35 weeks' gestation were stained with Ulex europaeus I to demonstrate the vasculature. With increasing gestation, there was a gradual increase in vessel density, particularly of capillaries. This was not a uniform process. A plexus of capillaries was prominent immediately beneath the ependyma while the more central parts of the germinal matrix contained fewer, but often larger diameter, vessels. The variation in vessel density which was a feature of the later gestation brains may have implications for local blood flow and may be a factor in haemorrhage at this site.     

Lateral actions at the inner plexiform layer of the carp retina: effects of turning windmill pattern stimulus

Lateral action from amacrine to ganglion cells was studied in the isolated carp retina by using a truncated windmill pattern (TWP). About 25% of ganglion cells of both "on" and "off" center types were suppressed or enhanced in firing activity in response to TWP turning. The suppressed cells were more sensitive to slow turning velocities of TWP than the enhanced cells. In the "on-off" type amacrine cells, a steady depolarizing or hyperpolarizing component (less than several mV) was maintained by stationary TWP, while the cells were exclusively depolarized by turning TWP at a wide range of velocities. These results suggest that individual responses of ganglion cells induced by both stationary and turning TWP are depending on a balance between two factors: the polarizing direction of steady components of the "on-off" amacrine cells and the polarizing direction of ganglion cells synaptically produced by the amacrine cells.     

人工培植牛黄中主要成分的薄层色谱扫描法

天然牛黄为名贵中药材,但货源紧缺供不应求,为此拟利用人工培植方法获得天然牛黄以利扩大药源。本文对十七个人工培植牛黄主成分进行定量分析,并与天然牛黄及人工合成牛黄作对比,从成分上探讨了人工培植牛黄的质量。     

The central projection of muscle afferent fibres to the lower medulla and upper spinal cord: an anatomical study in the cat with the transganglionic transport method

The projection of muscle afferent fibres to the medulla oblongata and upper spinal cord was studied in the cat by using transganglionic transport of wheat germ agglutinin-horseradish peroxidase conjugate. The results demonstrate a precise, musculotopic termination pattern in the external cuneate nucleus; thus, fibres from the intrinsic muscles of the paw terminate medially; those from forearm, arm, and shoulder muscles terminate progressively more laterally; and those from neck and thoracic muscles terminate in the ventrolateral and dorsolateral parts, respectively. Muscle afferent fibres to the main cuneate nucleus terminate in the ventral "reticular" region of the nucleus, with a sparse projection also to the ventral part of the rostral and caudal regions, including the base of the dorsal horn. Fibres from the neck muscles terminate slightly more laterally in the ventral region than do those from the limb muscles, but otherwise, and thus contrary to the case in the external cuneate nucleus, no topographic organization was detected. In the spinal cord, projection was found to laminae I and V, and from the musculature of the back of the neck to the central cervical nucleus.     

海南山苦茶提取方法的研究

目的:优化山苦茶的提取方法。方法:采用薄层层析法,以所得浸膏的量及其有效成分为考查指标,对山苦茶提取方法进行研究。结果:4种不同提取方式对山苦茶的有效成分的提取效率有明显影响。结论:山苦茶的最佳提取方法为:将山苦茶用工业乙醇浸渍24h后,以每千克每分钟1～3ml的流速缓缓渗漉,收集10倍量的渗漉液回收即得。     

先天性外耳道闭锁中耳畸形临床分析

采用外耳道及鼓室再造术治疗先天性外耳道完全闭锁29例。统计各种外、中耳畸形情况,比较耳廓发育程度、颞骨相当于外耳道口处有无骨性小凹、术前听力损失程度与中耳畸形的关系,将术前的常规横断位CT检查结果与术中所见进行对照。结果显示,术前可通过耳廓发育程度、相当于外耳道口处有无骨性小凹、听力损失程度和颞骨CT扫描来综合估计中耳畸形情况,为术前了解手术难度和确定手术进路及方式提供一定的参考依据。     

肱骨干骨折的单侧多功能外固定支架治疗

目的探讨单侧多功能外固定支架治疗肱骨干骨折的临床疗效.方法自1993年6月～1999年12月间临床应用单侧多功能外固定支架治疗肱骨干骨折116例,并经随访观察.结果116例中有88例随访6个月～7年(平均随访3.8年),骨折愈合平均时间为43个月,愈合率94.32％,患肢功能恢复满复.结论单侧多功能外固定支架治疗肱骨干骨折符合生物学固定原则,既能减少骨折局部的创伤,保护血运,又能稳定固定骨折,可早期进行功能锻炼,特别是对软组织损伤严重的开放性骨折更具优越性.     

中医外治技术联合快速康复外科理念对肝胆外科术后患者的临床疗效

目的:探讨中医外治技术联合快速康复外科(ERAS)理念促进肝胆外科患者康复的临床疗效。方法:选择于2018 年8 月—2020 年10 月在我科行腹腔镜手术的患者308 例,随机分为外治组156 例,对照组152 例。对照组行腹腔镜手术+ERAS 理念,外治组在前者基础上加用中医外治技术,比较两组患者在术后肠鸣音恢复、肛门首次排气及排便时间、疼痛评分、住院天数、相关并发症等方面的差异。结果:外治组术后肠鸣音恢复、肛门首次排气排便时间均短于对照组(P <0.05),术后疼痛评分低于对照组(P <0.05),行肝脏手术及胰腺手术患者的住院时间均短于对照组(P <0.05)。但两组相关并发症发生率差异无统计学意义(P <0.05)。结论:中医外治技术联合ERAS 理念在肝胆外科围手术期的应用能减轻术后患者的疼痛,促进胃肠道功能的恢复,缩短住院时间,值得临床推广应用。     

Marjolin’s ulcer of the forearm from 30-year-neglection of external fixator

BackgroundMarjolin’s ulcers are a rare form of malignancy that present at regions exposed to chronic infection. They present with a clinical triad of nodularity, induration, and ulceration greater than 3 months.Case reportWe present herein, an extremely rare case of Marjolin’s ulcer of the forearm, secondary to osteomyelitis, resulting from a 30-year neglection of external fixator used to treat a war injury of the forearm.DiscussionMarjolin’s ulcers are classically encountered in lower extremities at sites of burns, trauma or complicated wounds. In the upper extremity however, they are seldom mentioned in literature. The presence of risk factors raise the suspicion of the disease.ConclusionMarjolin’s ulcer is rare sequelae of chronic wound infection. Patients often present after a latency period with exacerbated pain, discharge, and exophytic mass. This disease should be suspected in every case of chronic ulcer, where histological studies of the lesion must be conducted to exclude or confirm the diagnosis.