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着重介绍基于眼球角膜压平面直径自动检测原理的智能化眼压计的设计原理,包括光学及结构设计,二次仪表的软件及硬件设计原理,眼压计算方法,以及眼压计的定标结果。 相似文献
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智能化动态应变三维细胞培养装置的研制 总被引:9,自引:0,他引:9
秦廷武 《中国医疗器械杂志》2000,24(4):187-190,202
介绍基于微电脑的智能化动态应变三维细胞培养装置的设计原理,包括控制单元的硬件和软件设计,机械单元结构及工作原理,三维支架构成及三维细胞培养单元结构设计。文中还介绍了该装置达到的主要技术指标和产生的积极效果。 相似文献
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本文介绍了画线车用反光玻璃微珠喷枪的功用、结构及工作原理,结合工程实践分析了喷枪的设计合理性,并提出改进设计。 相似文献
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本文介绍了一种用于研究肌肉等长收缩活动规律的电容式肌肉等长拉力测量仪,介绍了它的设计思想、工作原理、性能指标及特点。 相似文献
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目的探讨放射吸收法(RA)骨密度测定铝楔的作用原理。方法从骨质疏松定义开始,介绍骨密度现行的几种测量方法,重点为用RA法进行骨密度测量的原理。结果RA法可在X线机基础上进行,无须添加新设备,即可完成骨密度测量。结论RA技术是目前BMD测量中准确、方便、快捷、费用低的方法之一,值得普遍推广。 相似文献
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Bones provide mechanical support for joints, tendons and ligaments, protect vital organs, and act as a reservoir for calcium and phosphate in the preservation of normal mineral homeostasis. Bone is a complex and dynamic tissue that undergoes renewal and repair throughout life as the result of bone remodelling. Most diseases of bone result from abnormalities in bone remodelling that compromise the architecture, structure and mechanical strength of bone, leading to clinical symptoms such as pain, deformity, fracture and abnormalities of calcium and phosphate homeostasis. This contribution offers an overview of: the growth of bone, peak bone mass, the composition of bone, bone remodelling, the regulation of bone remodelling and resulting bone disease. 相似文献
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目的:比较新型持骨器与三爪持骨器用于治疗四肢长骨干骨折的疗效。方法:对自2004年6月以来笔者经治的94例116处四肢长管状骨骨折,按住院次序,奇数者(A组)采用新型持骨器治疗,偶数者(B组)用三爪持骨器治疗,比较二者在切口长度、手术时间、失血量、骨折对位情况、骨折愈合时间等方面的情况。结果:所有病例均取得半年以上随访,两者在骨折对位情况方面无明显差别,在切口长度、手术时间、失血量、骨折愈合时间等方面有显著性差异(P〈0.01)。结论:与采用三爪持骨器相比,采用新型持骨器治疗四肢长骨干骨折具有手术切口小、手术时间短、失血少、骨折愈合快等优点. 相似文献
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指出和分析了鄢铃等研制的所谓"超声波骨密度仪校准体模"的一系列基本概念和原理性错误,对其实用价值提出了否定性意见. 相似文献
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目的研究抗感染重组合异种骨(anti-infective reconstituted bone xenograft,ARBX)对感染性骨缺损的治疗作用。方法于2011年1月至2011年10月,32只新西兰种成年兔随机分为四组,每组8只,每只兔子胫骨近端做成大小为1.0cm×2.0cm×1.0cm的矩形骨缺损模型,注入金葡球菌,2周后再次手术行病灶情除,分别在骨缺损中植入ARBX(ARBX组)、植入重组合异种骨(reconstituted bone xenograft,RBX)并肌注庆大霉索(RBX+全身用药组),单纯植入RBX(RBX组)以及不植骨(不植骨组)。术后8周对缺损修复情况行大体解剖学、放射学、组织学、细菌学检查。结果①ARBX组细菌计数及改良X线Norden感染分值极低,明显小于其他各组(P〈0.01),其解剖学和组织学观察均无明显的骨髓炎表现;②RBX+全身用药组与RBX组的细菌计数,改良X线Norden感染分值均较高,明显大于ARBX组及不植骨组(P〈0.01);其解剖学和组织学均显示出严重的感染表现。结论①在病灶清除后,ARBX一期植入能有效治疗感染性骨缺损;②在全身用药或不用药条件下,一期植入RBX反而会加重感染。 相似文献
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观察运动对大鼠骨大小和骨量的影响。将健康4月龄雌性SD大鼠16只随机分成2组:正常对照组和运动组。运动组大鼠进行运动训练,每周5 d,每天连续匀速跑45 min,16 m/min,跑道倾角0°,持续10周。结果表明,大鼠运动训练后,骨直径、骨体积、骨湿重、骨湿重/体重、骨干重、骨干重/体重、骨干重/骨体积等指标均较对照组明显增加。提示运动有利于改善骨大小和骨量。 相似文献
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Pilar Bueno-Vargas Manuel Manzano Íigo M. Prez-Castillo Ricardo Rueda Jos M. Lpez-Pedrosa 《Nutrients》2022,14(6)
Catch-up growth is a process that promotes weight and height gains to recover normal growth patterns after a transient period of growth inhibition. Accelerated infant growth is associated with reduced bone mass and quality characterized by poor bone mineral density (BMD), content (BMC), and impaired microarchitecture. The present study evaluated the effects of a diet containing slow (SDC) or rapid (RDC) digestible carbohydrates on bone quality parameters during the catch-up growth period in a model of diet-induced stunted rats. The food restriction period negatively impacted BMD, BMC, and microarchitecture of appendicular and axial bones. The SDC diet was shown to improve BMD and BMC of appendicular and axial bones after a four-week refeeding period in comparison with the RDC diet. In the same line, the micro-CT analysis revealed that the trabecular microarchitecture of tibiae and vertebrae was positively impacted by the dietary intervention with SDC compared to RDC. Furthermore, features of the cortical microstructure of vertebra bones were also improved in the SDC group animals. Similarly, animals allocated to the SDC diet displayed modest improvements in growth plate thickness, surface, and volume compared to the RDC group. Diets containing the described SDC blend might contribute to an adequate bone formation during catch-up growth thus increasing peak bone mass, which could be linked to reduced fracture risk later in life in individuals undergoing transient undernutrition during early life. 相似文献
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Regular exercise and physical activity have many health benefits for both females and males. In particular, weight-bearing exercise has a protective effect on the skeleton, and can even be osteogenic (stimulating to bone formation). However, achievement of optimal bone mineral density and regulation of bone maintenance depend upon a combination of mechanical, hormonal and dietary factors. Adequate hormonal status (oestrogen and progesterone), and sufficient nutrition (calcium, protein, and other bone-building materials) are essential. For young women with components of the Female Athlete Triad (such as disordered eating, amenorrhea and other forms of menstrual dysfunction), one or more of these may be lacking, and decreased bone density can result. With an effort to maximize peak bone mineral density in the young athlete and to preserve or restore gonadal function during the reproductive years, the complications of altered bone mineral density and frank osteoporosis can be avoided. 相似文献
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用测定骨大小和骨量的方法,观察尼尔雌醇对去卵巢大鼠骨大小和骨量的影响。将32只健康4月龄雌性SD大鼠随机分成4组:正常对照组、假去卵巢组、去卵巢组、去卵巢+尼尔雌醇组。去卵巢+尼尔雌醇组大鼠于去卵巢手术后第2天开始给予CCE3灌胃,1 mg/(kg.BW),1次/W,持续11周。结果表明,去卵巢大鼠骨直径、骨体积、骨湿重、骨湿重/体重、骨干重、骨干重/体重、骨干重/骨体积等指标均低于假去卵巢组。去卵巢大鼠给予尼尔雌醇后,骨直径、骨体积、骨湿重、骨湿重/体重、骨干重、骨干重/体重、骨干重/骨体积等指标均较去卵巢组增加,并且基本上恢复至对照组水平。提示尼尔雌醇有利于改善去卵巢大鼠的骨大小和骨量。 相似文献