Recognition performance and perceived quality of video enhanced for the visually impaired

Subjects with central field loss (CFL) individually selected enhancement parameters to improve visibility of static video images. The effect of enhancement on performance and on perceived quality of motion video was assessed. Performance, e.g. recognition of visual details, was assessed by having subjects answer questions regarding visual information contained in the video motion segments that were enhanced using the individually-selected parameters. Enhancement did not improve subject performance on questions about video content. This result might be due to a ceiling effect limitation of the performance assessment method. In a second procedure, subjects' continuous perceptions of quality (using an adjective-based rating scale) were made while the enhancement parameters were abruptly switched among multiple values; these included the individually-selected enhancements, as well as unenhanced, over-enhanced, and degraded segments. The results indicate that adaptive enhancement (individually-tuned using a static image) adds significantly to perceived image quality when viewing motion video. Subjects who selected stronger contrast enhancement also perceived the enhancement to provide a larger benefit in image quality.     

脑卒中偏瘫康复训练程序化研究

目的 :观察脑卒中偏瘫患者进行康复训练的疗效。方法 :2 2例脑卒中患者 :康复组 12例 ,对照组 10例。 2组均接受神经科常规药物治疗。康复组按“中风后程序化康复训练表”进行康复训练 ,分别于康复前、康复后 1月和 3月进行疗效评定。结果 :日常生活活动能力量表 (ADL)测评结果显示 :康复组有效率 83 3% (10 / 12 ) ,对照组 30 % (3/10 ) ,2组差别有显著意义 (P <0 0 5 )。神经功能缺损评分结果显示 :康复组有效率 91 7% (11/ 12 ) ,对照组 4 0 % (4 / 10 ) ,2组差别有显著意义 (P <0 0 1)。结论 :康复训练能降低脑卒中偏瘫患者的致残率 ,提高生活质量。     

双腔右心室(附四例报告)

本文对我院1983～1985年经手术证实的4例双腔右心室病例,进行了分析讨论。本病除右心导管检查发现肺动脉与右心室有压力阶差移行曲线、右心造影时心腔内显示充盈缺损、超声心动图等检查有助于诊断外,X线心脏平片、心电图、临床症状、体征均无特异性的诊断价值。认为,由于本病多合并室缺,因此对室缺修补时,应常规探查右心室腔,以免漏诊。另外,对本病与法乐氏四联症的鉴别作了较详细的讨论。     

关节镜下改良张力带固定治疗髌骨骨折患者的康复护理

对38例新鲜髌骨骨折患者行关节镜直视下骨折复位,改良张力带固定,术前和术后给予及时有效的功能康复和护理指导,取得满意的效果。平均随访18.6个月,骨折平均愈合时间7.5周,所有病例愈合良好,无并发症出现。关节镜治疗髌骨骨折为髌骨骨折提供了一种新的治疗方法。应针对其解剖特点制订科学、有效的护理方法。     

Management of adult patients with a left ventricular assist device.

The number of left ventricular assist device (LVAD) implantations is growing as a result of increased waiting periods for cardiac transplantation and the decreased availability of organ donors. Furthermore, the Food and Drug Administration (FDA) has approved permanent LVAD support. After an acute hospitalization, patients with LVADs may need prolonged convalescence in a healthcare facility because they have complex medical needs and are physically disabled. Admission criteria need to be developed as essential patient and nursing competencies need to be defined as a part of a successful LVAD program in an acute rehabilitation center. Acute rehabilitation centers can help patients with LVADs transition to a home setting.     

全面康复:勃起功能障碍治疗的新目标

5型磷酸二酯酶(PDE5)抑制剂有效改善勃起功能障碍(ED)患者的勃起功能。枸橼酸西地那非的应用范围不断扩展,肺动脉高压已成为新的适应证。临床研究发现,西地那非能改善多种血管性疾病患者的内皮功能。在ED领域的研究进展包括:动物实验发现,西地那非可以改善海绵体内皮功能,增强磷酸化内皮型一氧化氮合酶(eNOS)蛋白表达,逆转缺血或缺氧导致的海绵体内压(ICP)降低。临床研究证实,西地那非可以使50%以上ED患者阴茎勃起恢复到最充分的硬度(4级勃起);使50%以上保留神经的根治性前列腺切除术后患者勃起功能康复,自发产生足以性交的勃起;使ED患者的自尊心、自信心和性关系满意度等社会心理功能恢复正常。从勃起功能到社会心理功能的全面恢复可能成为今后ED治疗的新目标。     

A Clinical Study for the Durability of Oxygenators on Cardiopulmonary Support

Abstract: Cardiopulmonary support (CPS) requires durability of the oxygenator. The life span of the oxygenator is affected by various clinical factors, including patient condition, perfusion condition, and equipment usage. Predictors for the durability of oxygenators were evaluated clinically in this study. Thirty-two patients, who had undergone CPS during the last 3 years in our institute were assigned to this study. Fifty oxygenators had been used (Capiox SX in 19, CB Maxima in 23, and AL-6000 in 8). Significant predictors for the durability of oxygenators were evaluated by nonparametric survival analysis and proportional hazards regression analysis. Univariate regression analysis revealed 6 significant predictors for the life span of oxygenators. These were the oxygenator type, type of centrifugal pump, acidosis with blood pH less than 7.35, base excess less than -5, blood glutamic-oxaloacetic transaminase (GOT) levels greater than 1,000 IU, and blood lactate dehydrogenase (LDH) levels greater than 3,000 IU. After multivariate analysis, there remained only 2 significant predictors. An oxygenator used with a noncoated CPS system (Capiox SX with Capiox EBS) proved to have a significantly shorter life span than one used with a heparin-coated system (CB Maxima or AL-6000 with CB BP-80) (hazards ratio, 3.588, p = 0.0065). Patient conditions, which revealed acidosis with less than -5 of base excess, significantly shortened the life of the oxygenator (hazards ratio, 3.595, p = 0.0188).