高血压对慢性肾衰竭患者肾功能影响的研究
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摘要
慢性肾衰竭(CRF)是指各种原因导致肾脏慢性进行性损害,使其不能维持基本功能,临床以代谢产物和毒素储留,水、电解质和酸碱平衡紊乱以及某些内分泌功能异常为表现为特征的一组综合征。在我国慢性肾衰竭的病因中,目前仍以原发性肾小球疾病居首位(约占60%),其次为高血压肾小动脉硬化、糖尿病肾病、慢性肾盂肾炎、多囊肾、系统性红斑狼疮较多见。目前CRF里逐年增加的趋势,对可能引起其恶化的相关因素探讨,有助于选择合理的治疗方案进行干预。
     促使肾功能恶化的因素中,以高血压最常见,CRF合并肾实质性高血压可达80%—90%,Amoroso等的研究显示夜间血压对肾衰的进展有重要的影响,因为夜间血压控制不良的患者肾衰更加严重。目前认为高血压可以通过牵张刺激引起组织纤维化,使细胞间粘附分子(ICAM)表达上调,淋巴细胞、巨噬细胞浸润而导致肾组织损伤,并能加速动脉粥样硬化的发生发展。血压升高会诱导小动脉性肾硬化而损坏肾功能。高血压早期常损害肾小管,随着病情的进展会逐渐累及肾小球。进行性高血压小动脉性肾硬化病人通常很少出现蛋白尿。肾脏病伴原发性高血压时,高血压性肾动脉硬化加重肾脏病变。在以蛋白尿为主要临床表现的慢性肾脏病中,高血压标志着肾脏病变开始恶化,并进一步加速肾脏病变的进展形成恶性循环。如果肾脏疾病并发高血压,由此引发的
    
     官林大学硕创卜学心之勺仑文
    小动脉性肾硬化又可加速肾脏疾病发展。
     根据1999wHO/ISH指南推荐:尿蛋白>19/d时,
    MAP92mmHg,BP125/75 mmHg;尿蛋白<19/d,MAP97
    mmHg,Bp 1 30/80 mmHg。近年来多组大型、长期临床试验也
    证实在一定范围内血压水平越低,肾脏保护作用越强。研究
    还发现收缩压达标比舒张压达标对延缓慢性肾功能不全进
    展更为重要。
     对伴有慢性肾功能不全患者来讲,’肾素一血管紧张素系
    统对其高血压的发展很重要。由于血管紧张素转化酶抑制剂
    (ACEI)和血管紧张素H受体拮抗剂(ARB)均有良好的降低
    全身血压和减少肾小球滤过压的作用,并且均可抑制RAS,
    具有肾脏保护、延缓慢性肾脏病进展和减少蛋白尿的作用,
    一般情况下药物治疗以这二类药物为基础。ACEI可使饭后
    肾小球高滤过性减弱,产生与限制蛋白质相似的预防作用;
    还能抑制集合管中抗利尿激素的水渗透作用,产生利尿与促
    尿钠排泄作用:对循环水平或心钠素肾内作用无明显影响。
    钙通道拮抗剂用药后引起降压效应,同时使肾素代偿性释放
    而使血浆中肾素活性升高,尤其适用于低肾素型高血压,对
    与全身血压调节有关的肾素一血管紧张素一醛固酮系统几
    乎没有影响。此类药物能有效地降低高钠饮食患者的血压。
    所有钙拮抗剂均增加肾血流量,而对肾小球滤过率有不同作
    用。钙通道阻滞剂分为二氢毗淀类和非二氢毗咙类,二者对
    于肾脏的影响不同,其原因在于二氢毗呢类CCB作用于入
    球和出球小动脉,而不改变肾小球膜的通透性。二氢毗陡类
    CCB可减轻肾钙化,改善残余肾单位高代谢状态,并阻止
    第2页共6页
    
    古林大学硕士月六亡比论文
    Ca进入肾细胞内导致的肾损害,还能降低ATH和去甲肾上
    腺素对肾内的损害,因而具有保护肾功能的作用。非二氢毗
    咤类CCB也有一定的延缓肾功能恶化的肾脏保护作用。目
    前主张应用长效的CCB。利尿剂与ACEI合用可提高其疗
    效。p受体阻滞剂、Q受体阻滞剂及其他的降压药物可用来
    协同降压,而不作为CRF时首选。
     本文将”例慢性肾衰竭病人按血肌醉的程度和高血压
    的程度不同分为A、B、C、D、E、F六组,分别给予降压
    治疗。如果无禁忌症首选ACEI和ARB,单用一种降压药物
    效果欠佳,则采取二联、三联甚至四联用药,目的是将血压
    控制在正常水平,从而探讨高血压对慢性肾衰竭肾功能恶化
    的影响,及降压对改善慢性肾衰竭的作用。研究结果表明,
    血压明显下降的患者,其肾功能均可恢复或部分恢复,血压
    下降不理想的病例,肾功能恢复亦不理想,甚至继续进展,
    必须透析以维持。而且轻度肾功能不全的患者对于降压药反
    应较好,降压治疗后肾功能也恢复较好。
     总之,有效的降压治疗对于肾脏保护,延缓慢性肾功能
    不全的进展至关重要。
Chronic renal failure (CRP) is a chronic progressive renal damage so as to incapable of keeping renal basic function. It's a group of clinical syndrome that is characterized by metabolized production and toxin remained , acid-base and electrolytes disorders and some internal secretion function abnormity. Many diseases can result in CRF such as primary glomerulus diseases, hypertensive glomerulosclerosis .diabetic nephropathy, chronic pyelonephritis , systemic lupus erythematosus respectively. In recent years, the incidence of CRF is increasing. A lot of reasons should aggravate CRF, thereinto, high blood pressure is the most important factor. This study is concerning the relation of hypertension and CRF.
    We selected 53 patients who had CRF and high blood pressure in China-Japan Union Hospital of Jilin University from the year of 2001 to 2004. We divided them into 6 groups. All of them have been treated the same method to improve their renal function. We chose angiotensin converting enzyme
    
    
    
    inhibitor (ACEI) (anyone whose serum creatinine is above 350umol/L don't choose it) or angiotensin II receptor blocker (ARB) to depress their blood pressure to perfect level. In case we can't carry our point, we combined ACEI and ARB or combined hydragogue, calcium channel blocker (CCB) , B
    receptor blocker and so on.
    The results showed that: 1. The patients with different stage of hypertension had different renal function obviously. 2. Once patients' blood pressure was declined, their renal function was improved presently. If we treat patients early, their blood pressure was up to perfect level easily and their renal function was improved dramatically. 3. It was difficult to improve their renal function for the patients with uremia if their blood pressure was too high to depress.
    From above results, we can conclude:
    1. Hypertension is a vital reason which aggravate CRF.
    2. Renal function can be improved by effectively depressing blood pressure.
    3. The earlier treat, the better the effect is.
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