儿童阻塞性睡眠呼吸暂停低通气综合征上气道结构的MRI研究分析

目的利用磁共振成像（MRI）对儿童阻塞性睡眠呼吸暂停低通气综合征（OSAHS）的上气道结构进行测量分析,探讨儿童OSAHS上气道的结构特点。方法选择原发性鼾症组（Ps组）30例和OSAHS组30例,同时随机选择30例正常儿童作为对照组,应用MRI对上气道进行空间测量和软组织测量,结果进行统计学分析。结果①空间测量：3组儿童之间相比,鼻咽气道截面积、口咽气道截面积、腭咽气道截面积、气道斜径,比较差异有统计学意义（P〈0．05）;②软组织测量：舌体截面积3组之间差异无统计学意义（P〉0．05）;OSAHS组比Ps组及对照组腺样体截面积大、腺样体斜距长,比较有统计学意义（P〈0．05）;OSAHS组、Ps组比对照组扁桃体截面积大,比较有统计学意义（P〈0．05）。结论应用MRI可以判定OSAHS儿童上气道的狭窄情况,可作为诊断儿童OSAHS的重要辅助手段。     

硼替佐米联合地塞米松与沙利度胺治疗多发性骨髓瘤的效果

目的比较硼替佐米＋地塞米松＋沙利度胺（BDT）方案与长春地辛＋表柔比星＋地塞米松＋沙利度胺（VADT）方案治疗多发性骨髓瘤（MM）的临床效果。方法MM病人67例,应用BDT方案治疗30例,VADT方案治疗37例,均治疗4个疗程,比较两组治疗前、治疗后β2-微球蛋白、免疫球蛋白、骨髓瘤细胞的变化,并比较两组疗效。结果BDT组及VADT组化疗后β2-微球蛋白、免疫球蛋白、骨髓瘤细胞均低于化疗前,差异有显著性（t=2．837～7．562,P％0．05）。BDT组完全缓解（CR）占13．0％,接近完全缓解（ncR）占20．0％,部分缓解（PR）占53．0％,微小反应（MR）占6．7％,总有效率93．3％;VADT组CR占3．0％,nCR占10．8％,PR占40．5％,MR占16．2％,总有效率70．3％,两组疗效比较,差异有显著性（Hc=51．67,P〈0．05）。结论BDT方案治疗MM效果优于VADT方案,且起效快,可改善病人的预后。     

称重法和化学分析法评估人群膳食矿物质摄入量的比较

目的 探讨称重法和化学分析法评估人群矿物质摄入量的差异和相关性.方法 同时使用称重法和化学分析法对89名上海市居民进行膳食调查,并对两种调查方法测得的钙、镁、铁、锌、铜、锰摄入量进行比较分析.结果 称重法调查的6种矿物质元素的摄入量高于化学分析法(P<0.05),称重法调查的平均每天钙、镁、铁、锌、铜、锰摄入量比化学分析法分别高20.9%、67.4%、19.5%、84.4%、46.7%和33.3%;称重法与化学分析法测得的钙、镁、铁、锌、铜、锰摄入量均呈显著正相关(P<0.01),相关系数分别为0.571、0.672、0.521、0.524、0.538和0.691.结论 称重法测得的人群膳食矿物质摄入量高于化学分析法.     

Factors causing malnutrition in patients with chronic uremia

There is abundant evidence that patients with chronic renal failure (CRF), including those treated by hemodialysis or peritoneal dialysis, have evidence of malnutrition with decreased body weight and subnormal values of serum proteins (suggesting a loss of visceral protein stores). Potential causes of an abnormal nutritional status that have been identified include an inadequate intake of protein or calories, an inability to activate the metabolic responses that are needed to achieve nitrogen and protein balance, or the presence of a disease that prevents activation of these metabolic responses or acts to stimulate the breakdown of body protein stores. Three critical metabolic responses to a limited protein intake have been identified: a reduction in the irreversible degradation of amino acids and the degradation of protein breakdown and an increase in protein synthesis in response to a meal. Metabolic acidosis blocks the first two responses and hence contributes to malnutrition in patients with chronic uremia. Other factors that could contribute to malnutrition include an inadequate intake because of anorexia or hormonal imbalances that impair protein turnover. In evaluating CRF patients with malnutrition, the first task is to ensure an adequate intake and to eliminate factors that impair the ability to achieve nitrogen balance.     

称重法和化学分析法评估人群膳食矿物质摄入量的比较

目的探讨称重法和化学分析法评估人群矿物质摄入量的差异和相关性。方法同时使用称重法和化学分析法对89名上海市居民进行膳食调查,并对两种调查方法测得的钙、镁、铁、锌、铜、锰摄入量进行比较分析。结果称重法调查的6种矿物质元素的摄入量高于化学分析法(P<0.05),称重法调查的平均每天钙、镁、铁、锌、铜、锰摄入量比化学分析法分别高20.9%、67.4%、19.5%、84.4%、46.7%和33.3%;称重法与化学分析法测得的钙、镁、铁、锌、铜、锰摄入量均呈显著正相关(P<0.01),相关系数分别为0.571、0.672、0.521、0.524、0.538和0.691。结论称重法测得的人群膳食矿物质摄入量高于化学分析法。     

Reduction of sound levels with antinoise in MR imaging

A combination of active and passive techniques was used to reduce the sound levels in magnetic resonance imagers. These techniques were integrated into an existing audio system. Measurements of sound reduction varied with the protocol being used and averaged 9.9 dB with coaxial cabling and 14.2 dB with fiberoptic conduction of the feedback signal to a controller. Patient comfort and communication were improved.