Relationship between serum magnesium level and coronary artery calcification in maintenance hemodialysis patients

Objective To evaluate the relationship between serum magnesium and coronary artery calcification (CAC) and their associated factors. Methods 131 patients with chronic kidney disease on regular hemodialysis (HD) were recruited into this study from December 2014 to December 2015 in our center. Demographic and clinical data of selected patients were collected. Serum fibroblast growth factor 23 (FGF-23) level was quantified by enzyme linked immunosorbent assay(ELISA). Quantification of coronary artery calcification score (CACs) was determined by multi-slice spiral computed tomography (MSCT). The relationships between serum magnesium and FGF-23 level, CACs, demographic and clinical data were investigated. Results Patients were divided into low serum magnesium group, normal serum magnesium group and high serum magnesium group according to their serum magnesium levels. There were significant differences in the distribution of diabetes history, serum phosphorus, serum albumin, serum pre albumin, serum uric acid among these three groups(P＜0.05). A significant positive correlation was confirmed between serum magnesium level and serum albumin, serum pre albumin, serum phosphorus and serum uric acid by Pearson correlation analysis and Spearman correlation analysis (r=0.389, 0.234, 0.200, 0.234, P=0.000, 0.007, 0.022, 0.007, respectively). According to the degree of CAC, all maintenance hemodialysis (MHD) patients were divided into non-calcification group, low calcification group, moderate calcification group and high calcification group, and there were significant differences in the distribution of the age, serum phosphorus, serum magnesium, FGF-23 levels among these groups (P＜0.05) . Spearman correlation analysis showed that CACs was positively correlated with age, FGF-23, serum phosphorus (r=0.309, 0.277, 0.180, P=0.000, 0.001, 0.040, respectively), while negatively correlated with serum magnesium level (r=-0.238, P=0.006) in patients with MHD. The independent risk factors of CACs were aging, high level of FGF-23 in MHD patients by using ordinal logistic regression. However, Hypermagnesemia was a protective factor. Conclusions The history of diabetes, low serum albumin, phosphorus metabolism disorder and CAC are associated with hypomagnesemia in MHD patients. In MHD patients, aging as well as high level of FGF-23 are the risk factors of CAC, and hypermagnesemia is a protective factor of CAC.     

Incidence of maintenance hemodialysis patients with fatigue and its related factors

Objective To investigate the incidence of fatigue in maintenance hemodialysis (MHD) patients and its related factors. Methods A total of 289 patients on MHD between January 2016 and March 2017 in hemodialysis centers of the First Affiliated Hospital of Xinjiang Medical University, Xinjiang Yili Kazak Autonomous Prefecture Friendship Hospital, and Yili Prefecture Hospital were enrolled. Internationally standard fatigue rating scale (FAI) was applied to assess the incidence of fatigue in MHD patients, and subjective comprehensive nutrition assessment (SGA) protein energy wasting rating scale was used to assess protein energy wasting (PEW) conditions. All patients were divided into the fatigue group and the non-fatigue group according to the FAI score. The clinical data and the blood biochemical indicators in two groups were compared. The risk factors of fatigue in MHD patients were analyzed by logistic regression method. Results The incidence of fatigue was 83.0% in MHD patients, and the rate of PEW was 62.6%. Blood total cholesterol in the fatigue group was lower than that of the non-fatigue group (P＜0.05). The difference between SGA scores of two groups had statistical significance (P＜0.001). Single factor logistic regression analysis results showed that higher SGA score (OR=1.312, 95%CI: 1.163-1.481, P＜0.001), lower blood total cholesterol (OR=0.661, 95%CI: 0.496-0.880, P=0.005) were risk factors of fatigue in MHD patients. Multivariable logistic regression analysis results showed that higher SGA score (OR=5.286, 95%CI: 2.078-13.442, P＜0.001) was an independent risk factor of fatigue in MHD patients. Conclusions The incidence of fatigue and PEW are high in MHD patients. PEW is an independent risk factor of fatigue in MHD patients.     

血液透析患者动脉弹性功能及相关因素分析

目的探讨维持性血液透析（MHD）患者在血液透析前、后脉搏波速度（PWV）和压力反射波增强指数（AIx）水平变化及其相关因素。方法选择92例MHD患者,采用标准袖带水银血压计测量非动脉一静脉内瘘侧上臂坐位血压,动脉脉搏波分析仪检测动脉弹性指数AIx和PwV,并分别与各因素进行单因素相关分析和多元逐步回归分析。结果血液透析患者的袖带血压、中心动脉压、PWV和AIx在血液透析前后均无显著性变化（P〉0．05）;多元逐步回归分析表明,AIx与患者的年龄、性别、主动脉收缩压有明显相关（P〈0．05）,而PWV与患者年龄、上臂舒张压、钙磷乘积、身高、透析时间和心率存在明显相关（P〈0．05）;PWV与AIx之间有明显相关（P〈0．05）。结论（1）血液透析患者的AIx与PWV、中心动脉压收缩压（C_SP）、身高、血清白蛋白、性别和年龄存在相关关系,其中与PWV、性别、年龄和C_SP呈正相关;而与身高和血清白蛋白呈负相关。（2）血液透析患者的PWV与AIx、年龄、舒张压、钙磷乘积、身高、透析时间和心率存在相关关系,其中与AIx、年龄、钙磷乘积、舒张压、透析时间及心率呈正相关,仅与身高呈负相关。     

维持性血液透析患者睡眠质量及其影响因素的研究

目的 调查维持性血液透析(MHD)患者的睡眠状况,了解影响MHD患者睡眠质量的相关因素.方法 采用方便抽样方法,抽取中山大学附属第一医院、中山大学附属第二医院、广东省东莞市东华医院、江门市新会区人民医院、河源市人民医院、佛山市顺德区中医院及云南省楚雄市人民医院的MHD患者424例为研究对象.以匹茨堡睡眠质量指数量表( PSQI)、不安腿综合征诊断及评分标准、社会支持评定量表、综合主观性营养评估、家庭关怀度指数问卷、疾病家庭负担量表及自设的一般情况调查表调查MHD患者的睡眠状况并分析其影响因素.结果 395例(93.2％)患者PSQI总分≥5分.家庭关怀度及社会支持与睡眠指数得分呈负相关(r=-0.133,P=0.006;r=-0.105,P=0.031).疾病负担与睡眠指数得分呈正相关(r=0.215,P=0.000).营养状况(F=46.123,P=0.000)、不安腿综合征(F=9.392,P=0.000)、睡眠呼吸暂停综合征(F=5.645,P=0.001)与睡眠指数得分密切相关.结论 MHD患者睡眠质量差的发生率相当高,其睡眠质量与家庭关怀度、社会支持等多个因素相关.     

维持性血液透析患者冠心病介入治疗

目的探讨维持性血液透析患者合并冠心病心脏介入治疗的安全性和可行性。方法回顾性分析本院7例血液透析合并冠心病患者在强化透析的基础上应用非离子型低渗造影剂行冠状动脉造影术＋支架植入术的临床资料。结果单支病变3例,多支病变4例,行经皮腔内冠状动脉成形术（PTCA）置放支架1～2个。死亡3例,病情改善4例。此4例术后心绞痛症状改善,肾功能无进一步恶化。结论血液透析患者中合并不稳定心绞痛患者可考虑冠状动脉介入治疗,疗效较好,但对于同时有心肌酶谱升高者预后不良。     

Analysis of early mortality and related risk factors in maintenance hemodialysis patients

Objective To analyze the early mortality and related risk factors of new hemodialysis patients in Zhejiang province, and provide basis for reducing the death risk of hemodialysis patients. Methods The early mortality and related factors of new hemodialysis patients from January 1, 2010 to June 30, 2018 were retrospectively analyzed using the database of Zhejiang province hemodialysis registration. The early mortality was defined as death within 90 days of dialysis. Cox regression model was used to analyze the related risk factors of the early mortality in hemodialysis patients. Results The mortality was the highest in the first month after dialysis (46.40/100 person year), and gradually stabilized after three months. The early mortality was 25.33/100 person year. The mortality within 120 days and 360 days were 21.40/100 person year and 11.37/100 person year, respectively. The elderly (≥65 years old, HR=1.981, 95%CI 1.319-2.977, P＜0.001), primary tumor (HR=3.308, 95%CI 1.137-5.624, P=0.028), combined with tumors (not including the primary tumor, HR=2.327, 95%CI 1.200-4.513, P=0.012), temporary catheter (the initial dialysis pathway, HR=3.632, 95%CI 1.806-7.307, P＜0.001), lower albumin (＜30 g/L, HR=2.181, 95%CI 1.459-3.260, P＜0.001), lower hemoglobin (every 0.01 g/L increase, HR=0.861, 95%CI 0.793-0.935, P=0.001), lower high density lipoprotein (＜0.7 mmol/L, HR=1.796, 95%CI 1.068-3.019, P=0.027) and higher C reactive protein (≥40 mg/L, HR=1.889, 95%CI 1.185-3.012, P=0.008) were the risk factors of early death for hemodialysis patients. Conclusions The early mortality of hemodialysis patients is high after dialysis, and gradually stable after 3 months. The elderly, primary tumor, combined with tumors, the initial dialysis pathway, lower albumin, lower hemoglobin, lower high density lipoprotein and higher C reactive protein are the risk factors of early death for hemodialysis patients.     

维持性血液透析患者营养状况及其影响因素分析

目的 观察分析维持性血液透析(maintenance hemodialysis,MHD)患者营养状况及其影响因素,提出相应的防治对策.方法 选取本中心MHD患者103例,采用改良定量主观整体评估表进行营养状况评估,将患者分为营养正常组(评分≤10分)和营养不良组(评分＞10分),分析影响MHD患者营养不良的相关因素.结果 103例MHD患者中,营养正常组59例,营养不良组44例,营养不良发生率为42.72％.多因素Logistic回归分析结果显示:增龄[95％CI(1.004,1.072),P=0.027]、糖尿病[95％ CI(1.113,16.143),P=0.034]、肾病营养知识知晓率低[95％ CI(1.253,12.531),P=0.019]为MHD患者发生营养不良的危险因素.结论 MHD患者营养不良发生率高,年龄、糖尿病、肾病营养知识知晓率与患者发生营养不良有关.临床工作中应采取有效合理的干预方法加强营养,改善患者营养状况.     

青年维持性血液透析患者心血管疾病调查及危险因素分析

目的调查青年维持性血液透析（MHD）患者心血管疾病的发病情况和病变特点，并探讨其危险因素。方法采用横断面研究。MHD患者98例，以45岁为界分为青年组（47例）和中老年组（51例）。收集患者临床资料和生化指标。心脏超声检查测量心脏腔径及心功能参数。分析青年组患者心脏结构和功能异常的患病率、病变特点及其影响因素。结果（1）47例青年患者中有30例（63．8％）存在心脏结构异常，主要表现为左心室肥厚、左心房增大和瓣膜反流，患病率分别为61．7％、38．3％和34．0％。（2）青年组患者向心性肥厚的患病率为86．2％，离心性肥厚的患病率为13．8％，与中老年组相比，差异有统计学意义（P〈0．05）。（3）与无心脏病变青年MHD患者相比，伴心脏病变者的超滤量、收缩压、血磷和甲状旁腺激素明显增高，而Kt／V、血红蛋白和血清白蛋白明显降低，差异有统计学意义（P〈0．05）。Logistic回归分析结果显示，超滤量、收缩压、血红蛋白和血甲状旁腺激素是青年MHD患者并发心脏病变的独立危险因素。结论青年MHD患者心血管疾病的患病率较高，主要表现为左心室肥厚、左房增大和瓣膜反流。超滤量、收缩压、血红蛋白和血甲状旁腺激素水平可能是影响青年MHD患者并发心脏病变的独立危险因素。     

Relationship between coronary artery calcification and outcomes in maintenance hemodialysis patients

Objective To evaluate the relationship between coronary artery calcification (CAC) and outcomes in maintenance hemodialysis (MHD) patients. Methods Eighty-six patients who were on MHD between October 2014 and May 2015 in the blood purification center of our hospital were enrolled prospectively. CAC was measured and scored by multiple slice computed tomography (MSCT). According to the CAC score (CACs), the patients were divided into mild CAC (CACs＜100) group and severe CAC (CACs≥100) group. Kaplan-Meier analysis was performed to analyze the survival rates of the two groups, and a COX proportional hazards regression model was used to estimate the risk factors of all-cause mortality and cardiovascular disease mortality in MHD patients. Results Severe CAC (CACs≥100) was present in 62.8% (54/86) patients. The median of follow-up duration was 28.9(23.8, 29.4) months. During the follow up, 2(6.3%) patients in CACs＜100 group and 18 (33.3%) patients in CACs≥100 group died. Kaplan-Meier survival analysis demonstrated that patients in CACs≥100 group had higher all-cause mortality and cardiovascular mortality as compared with patients in CACs＜100 group (P=0.007, P=0.030). Multivariate COX regression analysis demonstrated that CACs≥100 (HR=7.687, 95%CI 1.697-34.819, P=0.008) and low single-pool Kt/V (HR=0.092, 95%CI 0.020-0.421, P=0.002) were independent risk factors for all-cause mortality. Old age (HR=1.192, 95%CI 1.100-1.291, P＜0.001), short duration of dialysis (HR=0.598, 95%CI 0.445-0.804, P=0.001), low 25-hydroxy vitamin D3 (HR=0.461, 95%CI 0.326-0.630, P＜0.001), and low total cholesterol (HR=0.405, 95%CI 0.213-0.772, P=0.006) were independent risk factors for cardiovascular disease mortality. Conclusions The CACs is significantly related with overall survival in MHD patients. Large multicenter prospective studies are to be evaluated the association between CACs and long-term survival in MHD patients.     

Clinical characteristics and risk factors of infection-related hospitalization in maintenance hemodialysis patients

Objective To explore the clinical characteristics and risk factors of maintenance hemodialysis (MHD) patients combined with infection-related hospitalization. Methods Patients with MHD from December 1, 2013 to February 28, 2018 were retrospectively selected and then followed up for at least 1 year until February 28, 2019. Baseline data including demographic and clinical data of patients were collected. According to whether the infection-related hospitalization occurred, patients were divided into infection group and non-infection group. The clinical characteristics and related factors were compared between the two groups. Logistic regression model was used to analyze the influencing factors. Results A total of 392 patients were included in the study. Two hundred and fifty-five cases were males, accounting for 65.1%. The age was (59.39±15.28) years old. The infection rate of diabetic kidney disease patients was the highest (32.2%). The main site of infection was the lung, accounting for 78.4%, which was far higher than the catheter-related infection in the second position. After infection, quinolones and cephalosporins were often the preferred drugs. Compared with the non-infection group, the infection group had older age [(62.96±15.16) years vs (57.98±15.12) years, t=-2.607, P=0.004], higher proportion of comorbid diabetes (45.9% vs 32.4%, χ2=6.334, P=0.012) and previous smoking history (30.6% vs 18.5%, χ2=6.831, P=0.009), longer time of first dialysis stay [13.0(9.0, 18.0) d vs 12.0(9.0, 17.5) d, Z=3.659, P=0.001] and lower hemoglobin [(74.43±19.93) g/L vs (79.06±17.10) g/L, t=1.612, P=0.022] , albumin [(32.63±5.33) g/L vs (33.99±6.14) g/L, t=2.062, P=0.029] and red blood cell count [2.53×1012/L (2.06×1012/L, 3.06×1012/L) vs 2.68×1012/L(2.28×1012/L, 3.07×1012/L), Z=2.118, P=0.034]. Multivariate logistic analysis found that older age (every 1 year, OR=1.016, 95%CI 1.003-1.030, P=0.017) and longer hospital stay at first dialysis (every 1 d, OR=1.047, 95%CI 1.014-1.080, P=0.008) were independent risk factors, and higher hemoglobin (every 1 g/L, OR=0.987, 95%CI 0.975-0.999, P=0.033) was a protective factor for infection-related hospitalization in MHD patients. Conclusions MHD patients with diabetic kidney disease have the highest infection incidence. The incidence of pulmonary infection is much higher than other types of infection such as catheter-related infection, urinary tract infection and sepsis. Aging and low hemoglobin are risk factors for MHD patients to prone to co-infection.     

维持性血液透析患者发生急性冠脉综合征的危险因素分析

目的 探讨影响维持性血液透析患者发生急性冠脉综合征（ACS）的危险因素。方法 回顾性分析2015年3月至2018年4月在河北省承德市中心医院和滦平县中医院血液净化中心行维持性血液透析的175例患者的临床资料,根据是否发生ACS分成两组,其中发生ACS患者57例（ACS组）,未发生ACS的118例（非ACS组）。收集患者的性别、年龄、肾衰竭的基础疾病、透析龄、发生ACS前1个月的收缩压、舒张压、脱水量及发生ACS时的血红蛋白（Hb)、C反应蛋白(CRP)、甲状旁腺素(PTH)、血白蛋白(ALB)、血脂、血尿酸(UA)、肺动脉压(PH)等指标进行比较分析;应用多因素的logistic回归分析导致ACS的危险因素。结果 ACS组的男性居多[38例（66.67%）],而房颤病史、透析前的收缩压和舒张压、超流量、红细胞分布宽度（RDW）、血钾（K⁺）低于非ACS组,ALB高于非ACS组,差异均有统计学意义（均P<0.05）。二元logistic回归分析显示：透析前的收缩压≥160 mmHg（OR=3.240,95%CI：1.255～5.367,P<0.05）和超流量≥3 500 mL/次（OR=2.797,95%CI：1.033～4.574,P<0.05）是影响维持性血液透析患者发生ACS的相关影响因素。结论 透析前血压控制不良（收缩压≥160 mmHg）、超流量过大（超流量≥3 500 mL/次）使维持性血液透析患者发生ACS的风险增加。     

Epidemiological investigation of hypertension and its control on maintenance hemodialysis patients in Anhui province

Objective To understand the prevalence, treatment and influence factors of hypertension in maintenance hemodialysis (MHD) patients in Anhui Province. Methods A total of 2724 adult patients on MHD from January 1st 2014 to March 31st 2014 in 26 hospitals of southern, northern and central Anhui Province were investigated. Their demographic characteristics, primary disease, complications, medications, dialysis and laboratory examination were explored. The prevalence treatment rate and control rate of hypertension were analyzed. Associated factors for controlling hypertension [systolic blood pressure (SBP)＜140 mmHg and diastolic blood pressure (DBP)＜90 mmHg] were assessed by logistic regression analysis. Results (1) The prevalence of hypertension in the hemodialysis patients was 87.0%. Their treatment rate and control rate were 93.2% and 23.9% respectively. The average of SBP was (145.90±21.18) mmHg, and the DBP on average was (83.60±12.21) mmHg. The most commonly used anti-hypertensive drug is calcium channel blocker (88.2%). Over one third (45.7%) of patients were treated with two kinds of anti-hypertensive drug, 26.2% with 1 kind, 21.7% with 3 kinds, and 6.4% with 4 kinds or more. (2) Compared with non-hypertension patients, patients with hypertension have older age, higher body mass index (BMI), phosphorus, SBP and DBP, as well as lower hemoglobin and Kt/V (all P＜0.05). (3) The multivariate logistic regression analysis showed that Ca＞2.50 mmol/L (OR=2.084, 95%CI 1.008-4.307, P=0.047) positively correlated with controlling hypertension, while smoke (OR=0.594, 95%CI 0.356-0.911, P=0.046) and BMI 18.5～23.9 kg/m2 (OR=0.516, 95%CI 0.293-0.907, P=0.022) negatively correlated with it. Conclusions High prevalence yet low control rate of hypertension in MHD patients in Anhui Province were observed. Hypocalcemia may be a protective factor for hypertension control, while smoke and BMI may be risk factors for it.     

维持性血液透析患者心脏结构功能的危险因素分析

目的探讨影响维持性血液透析（MHD）患者心脏结构功能的危险因素。方法选择MHD患者153例,超声心动图测定心脏各项指标,并计算左心室心肌重量指数（LVMI）。生存函数乘积限（Kaplan-Meier）分析观察LVMI对患者预后的影响,分析影响LVMI的危险因素关系。结果153例MHD患者中,84例（占55．2％）患者存在左心室肥厚。多元回归结果显示超滤量（UF）和血红蛋白是影响左心室肥厚的独立危险因素。每周3次透析与每周2次透析的患者左心室肥厚的发生率分别为59．3％和52．1％。Kaplan-Meier生存分析显示左心室肥厚患者的5、10和15年生存率分为78．3％、54．3％和36．2％。结论MHD患者存在较高的左心室肥厚发生率,UF、血红蛋白与左心室肥厚相关,预防患者左心室肥厚可能有助于提高患者生存率。     

维持性血液透析患者重组人红细胞生成素治疗剂量的影响因素

目的分析影响维持性血液透析（MHD）患者重组人红细胞生成素（rHuEPO）治疗剂量的因素。方法选择72例血红蛋白（Hb）达标（≥100g／L）的MHD患者,分析每周rHuEPO治疗剂量与糖尿病、使用血管紧张素转化酶抑制剂（ACEI）和（或）血管紧张素受体拈抗剂（ARB）、微炎症、缺铁、联合血液透析滤过（HDF）治疗、透析充分、继发性甲状旁腺功能亢进（SHPT）、低蛋白血症等临床因素的相关性。结果有糖尿病组较无糖尿病组、使用ACEI和（或）ARB组较未用ACEI和（或）ARB组、有微炎症组较无微炎症组、缺铁组较不缺铁组每周rHuEPO治疗剂量均增加（P〈0．05）。而是否联合HDF治疗、透析是否充分、有无SHPT、有无低蛋白血症,每周rHuEPO治疗剂量均无差异（P〉0．05）。结论糖尿病、使用ACEI和（或）ARB、微炎症、缺铁影响MHD患者rHuEPO治疗剂量。     

Assessment of quality of life and its influence factors in maintenance hemodialysis patients

Objective To investigate the quality of life (QOL) of maintenance hemodialysis （MHD）patients and its influencing factors. Methods A total of 257 MHD patients in our hospital were recruited in this study. Clinical data of the patients were collected, and the QOL was assessed by MOS 36 item short form health survey(SF-36). Nutritional status of patients was evaluated by modified quantitative subjective global assessment (MQSGA). Univariate analysis of variance,pearson correlation analysis and multiple linear stepwise regression analysis were performed to determine the effect of related factors on QOL scores. Results The scores of all scales of SF - 36 evaluation in MHD patients were relatively lower than that of general population as reported before. Their physiological component summary (PCS) score decreased gradually as age grew, nevertheless, the mental component summary (MCS) score was highest in the group aged 41 - 60. The score was lower in patients with moderate to severe malnutrition or diabetic nephropathy when compared with other patients. Univariate analysis of variance also revealed that high SF-36 scores associated with higher education or income. Multivariate analysis indicated that PCS score and total SF-36 score of MHD patients were positively correlated with body mass index (BMI) and cholesterol, but negatively correlated with diabetic nephropathy, pulmonary artery systolic pressure and MQSGA score (all P＜0.05). There was positive correlation between MCS score and income,yet negative correlation between MCS score and MQSGA score (all P＜0.05). Conclusion MHD patients had relatively poor QOL. Primary diseases and nutritional status were probably the main influencing factors. Age, educated level, family income and pulmonary artery systolic pressure might also have effects on their QOL.     

Analysis of post-dialysis fatigue in maintenance hemodialysis patients

Objective To analysis the post-dialysis fatigue status of maintenance hemodialysis patients, explore the influencing factors in these patients and propose effective interventions. Methods One hundred and twenty maintenance hemodialysis patients in Department of Nephrology, Second Affiliated Hospital of Nanjing Medical University were enrolled. Clinical data were obtained by questionnaires. Biochemical changes before and post hemodialysis were recorded. The serum concentrations of hemoglobin, albumin, electrolyte, bicarbonate and lactic acid were collected for analysis. Results One hundred and nine (90.8%) effective questionnaires were collected, in which more than half of patients claimed to experience post-dialysis fatigue. Time to recover from hemodialysis (TIRD) was different: the median (interquartile range) time was 2.00(0.00, 3.00) hours. In the study, 30.3% patients reported no fatigue after hemodialysis. Recovery time in 35.8% patients was more than 30 minutes to 2 hours, 22.0% was 3 to 4 hours, 11.0% was 5 to 12 hours, 0.9% patients took longer time to recover from a dialysis session. According to the recovery time, these patients were divided into three groups. Among the three groups, the ultrafiltration, the serum sodium and lactic acid after dialysis showed significant difference. It was showed by the unconditional logistic regression analysis that ultrafiltration (OR=2.35, 95%CI 1.44-3.83), serum sodium (OR=0.75, 95%CI 0.65-0.88) , lactic acid (OR=3.16, 95%CI 1.32-7.55) were associated of TIRD. Conclusions The incidence of post-dialysis fatigue is high. Most of the patients require more rest or sleep immediately after dialysis. The level of lactic acid is a significant influencing factor of the fatigue of patients. TIRD is correlated with the elevation of lactic acid during the dialysis process, and more attention should be paid to post-dialysis fatigue.     

鲑鱼降钙素对维持性血液透析患者并发高钙血症的疗效观察

目的观察鲑鱼降钙素治疗维持性血液透析（MHD）患者并发高钙血症的疗效。方法对28例MHD患者合并高钙血症者给予鲑鱼降钙素肌肉注射,开始每天1次,连续6d,以后每周2次,透析后使用。疗程12周。以用药前和用药后第2、4、8、12周检测血钙、血磷、钙磷乘积和血全段甲状旁腺素（iPTH）为指标,应用视觉模拟疼痛评分法对骨关节疼痛程度进行定量,并进行统计学分析。结果25例完成观察。治疗后第4周血钙、钙磷乘积均有不同程度降低,与治疗前比较有统计学意义（P〈0．05）;血磷和iPTH也有降低,但与治疗前比较差异无显著性。治疗后第4周,所有患者骨关节疼痛、活动障碍等症状均有不同程度缓解;疗程结束后23例症状基本消失,但治疗前已发生的转移性钙化等现象无变化。结论鲑鱼降钙素治疗MHD患者并发高钙血症,可以有效降低高血钙、钙磷乘积,并能够有效缓解骨关节疼痛症状,近期疗效显著。     

Muscle mass evaluation and influential factors of sarcopenia in maintenance hemodialysis patients

Objective To evaluate the muscle mass in maintenance hemodialysis (MHD) patients and analyze the influential factors. Methods Ninety-seven patients on MHD and 34 healthy people were recruited. Muscle mass was measured by bioelectrical impedance analysis and compared. Patients'age, sex, height, body weight, walking activity, modified quantitative subjective global assessment (MQSGA) score and laboratory tests were recorded. The relationship of appendicular skeletal muscle mass/height2 (ASM/H2) and other factors were analyzed using multivariate linear regression. Results Compared with normal cohort, the MHD patients showed lower body fat rate and lower ASM/H2 (both P＜0.05). In 97 MHD patients, 21.4% of male patients suffered from sarcopenia, and 24.4% of female patients suffered from sarcopenia. Patients were divided into two groups according to the level of ASM/H2 (male＜7.0 kg/m2, female＜5.8 kg/m2). The grip strength, serum creatinine, 1,25(OH)2D and mid-arm muscle circumference in low ASM/H2 group were lower than those in normal ASM/H2 group, and the differences were significant (all P＜0.05). In multivariable regression model, male (β=0.534, P=0.003), 1,25(OH)2D (β=0.582, P=0.024), creatinine (β=0.421, P=0.037), grip strength (β=0.681, P=0.001), and lg[NT-proBNP] (β=-1.760, P=0.042) were independently associated with ASM/H2 in MHD patients. Conclusion The prevalence of sarcopenia is much higher in MHD patients than in healthy people. The levels of grip strength, NT-proBNP, creatinine and 1, 25(OH)2D are the important influential factors for muscle mass in MHD patients.     

Clinical significance of neutrophil-lymphocyte ratio in maintenance hemodialysis patients

Objective To explore how neutrophil-lymphocyte ratio (NLR) is related with inflammation and atherosclerosis, and the role of NLR in hospitalization in maintenance hemodialysis (MHD) patients. Methods MHD patients treated in hemodialysis center of Sichuan Provincial People's Hospital from June till November 2013 were enrolled. Patients with severe infection, cardiovascular events and malignant carcinoma were excluded. NLR was determined from complete blood count differential. Clinical parameters such as serum albumin, lipids, intact parathormone, ferritin, C-reactive protein (CRP), 25-(OH) vitamin D, interleukin-6 (IL-6) and alkaline phosphatase (ALP) were collected. Pulse wave velocity (PWV) and ankle-brachial index (ABI) were used to evaluate the arterial stiffness. Spearman analysis was used to evaluate the relationship between NLR and these parameters. All patients were divided into low NLR group (NLR≤3.25) and high NLR group (NLR＞3.25) on the median NLR, and their differences in these indexes were analyzed. During the one-year follow-up, the reasons and rates of hospitalization and survival were analyzed. Results One hundred and thirteen MHD patients including 58 males and 55 females were enrolled with (69±49) dialysis age and (54±15) average age. (1) The NLR was significantly correlated with whole blood count (WBC, r=0.538, P＜0.001), ABIL (r=0.201, P=0.033), ABIR (r=0.235, P=0.012) and total cholesterol (TC, r=-0.414, P＜0.001) and low-density lipoprotein cholesterol (LDL-C, r=-0.378, P＜0.001). (2) Low NLR patients had increased TC, LDL-C and IL-6 as compare with high NLR patients, however decreased ABIL and ABIR (all P＜0.05). (3) Forty one patients were hospitalized 63 times during the follow-up period. Annual hospitalization rate was 558/1000 and the mortality rate was 17.7/1000. (4) NLR in patients at least hospitalized once a year was significantly lower than in patients without hospitalization, while ALP was higher (all P＜0.05). Compared with those in other patients, NLR and hemoglobin (Hb) were significantly lower in patients with hospitalization due to infection, while ALP was higher (all P＜0.05). Conclusions NLR is related with WBC, ABI, TC and LDL-C in MHD patients. Lower NLR may indicate high risk for cardiovascular, atherosclerosis and hospitalization, probably different form non-MHD patients, which needs more studies to verify.     

Risk factor analysis of pneumonia in maintenance hemodialysis patients

Objective To investigate the risk factors of pneumonia in maintenance hemodialysis (MHD) patients. Methods The clinical data of patients undergoing dialysis longer than three months at the Hemodialysis Center of West China Hospital of Sichuan University from July 2013 to July 2018 were retrospectively analyzed. The patients were divided into pneumonia group and non- pneumonia group. Follow-up time started from admission to the beginning of hemodialysis. All patients were followed until the patient died, or withdrawn from hemodialysis, or transferred to another center, or until the study deadline (April 2019). Baseline clinical data were compared between the two groups, and the differences in clinical data between the pneumonia group and the baseline were also analyzed. Risk factors for pneumonia in hemodialysis patients was analyzed by binary logistic regression. Kaplan-Meier curve was used to compare the survival prognosis of the two groups, and the Log-rank method was used for significant test. A multivariate Cox proportional hazard model was used to analyze risk factors for MHD patients' death. Results (1) A total of 311 patients were enrolled in the study, in which 178 (57.2%) of the patients were male, and 75(24.1%) of the patients had pneumonia. Compared with non-pneumonia group, the pneumonia group patients were older (P=0.002), had higher level of white blood cells (P=0.001) and lower level of serum creatinine (P=0.003), albumin (P=0.001), and serum magnesium (P=0.039). There were also statistically significant differences between the two groups in the proportion of females and underlying diseases (all P＜0.05). (2) The time of pneumonia occurred from the initial time of dialysis was (10.69±9.82) months. Compared with baseline values, decreased hemoglobin and albumin level were found (both P＜0.01). (3) Logistic regression analysis showed male patients had lower risk of pneumonia than female patients (OR=0.438, 95%CI 0.242-0.795, P=0.007). For every 1 g/L increase in albumin, the risk of pneumonia was reduced by 6.4% (OR=0.936, 95%CI 0.885-0.991, P=0.022). Kaplan-Meier survival curve analysis showed that the difference in 5-year cumulative survival rate between pneumonia group and non-pneumonia group was statistically significant ( 60.6% vs 84.4%, χ2=16.647, P＜0.001). (4) Multivariate Cox regression analysis showed that long dialysis time (HR=0.870, 95%CI 0.832-0.909, P＜0.001) and high serum albumin level (HR=0.898, 95%CI 0.845-0.955, P=0.001) were protective factors in patients with MHD. Pneumonia (HR=3.008, 95%CI 1.423-6.359, P=0.004) was an independent risk factor for death in MHD patients. Conclusions Hemoglobin and albumin level are reduced in MHD patients with pneumonia. Low albumin level is a risk factor for pneumonia in patients. MHD patients with pneumonia have a lower survival time than those without pneumonia.