Serum iron, total iron binding capacity, plasma copper and hemoglobin types in anemic and poikilocytic calves

Ninety-eight calves were studied to determine if anemia and poikilocytosis were related to iron or copper status or hemoglobin type. No significant differences were found in serum iron, total iron binding capacity, marrow iron, plasma copper or hemoglobin type between affected and normal calves. Poikilocytes were strongly inversely correlated (-0.9177) with age. Calves less than six weeks of age had more poikilocytes, lower serum iron, higher total iron binding capacity, less adult hemoglobin and more neonatal and fetal hemoglobin than calves greater than six weeks of age.     

Serum ferritin level. Determinant of iron requirement in hemodialysis patients

Seventeen patients without renal failure and 14 patients receiving long-term hemodialysis were studied. Serum and bone marrow ferritin determinations were made at the time of bone marrow aspiration. A good correlation was found between serum ferritin levels and bone marrow iron stores, as well as between bone marrow ferritin levels and iron stores. Serum ferritin determinations appear to give an accurate estimation of bone marrow iron stores, thereby providing a reliable guide for iron replacement therapy and reducing the need for repeated bone marrow aspirations. Serum ferritin levels of less than 105 ng/ml suggest decreased iron stores, and values greater than 120 ng/ml indicate adequate or increased iron stores. Preliminary data also suggest that bone marrow ferritin determinations may be useful in quantitating bone marrow iron stores.     

Serum ferritin, cobalt excretion and body iron status.

Serum ferritin concentration was measured by immunoradiometric assay in 64 subjects. It was closely related to the size of body iron stores measured by hemosiderin content of bone marrow in all subjects and by the deferoxamine test in 10 patients with iron overload. Urinary cobalt excretion, an indirect measure of iron absorption, was inversely related to hemosiderin content of bone marrow in 34 patients aged 18 to 72 with or without liver disease, but this relation did not hold in a group of 20 student volunteers aged 17 to 30, indicating that the test is unreliable in young people. A strong inverse correlation was demonstrated between values for cobalt excretion and serum ferritin in the 34 patients and between those for iron absorption and serum ferritin in the 20 students. Serum ferritin concentration appears to reflect accurately the iron status of the healthy individual but high values in liver disease must be interpreted with caution.     

Serum ferritin and the iron status of Canadians.

Serum ferritin concentration was determined in 1105 Canadians aged 1 to 90 years. Geometric mean values (ng/ml) were as follows: children 1 to 4 years old, 12; children 5 to 9 years old, 15; adolescent girls, 17; adolescent boys, 18; women 20 to 39 years, 23; women 65 years and older, 52; men 20 to 39 years, 93; and men 40 and older, 92. Ranges were side in all age groups, reflecting variations in size of body iron stores. From analysis of the ferritin values it is highly probably that iron stores were greatly reduced in approximately 25% of children, 30% of adolescents, 30% of menstruating women, 60% of pregnant women and 3% of men. Iron-deficiency anemia was noted in only 2% of subjects. If "normality" requires more than small amounts of storage iron to meet physiologic demands, the study results suggest a high probability of iron deficiency in 60% of the pregnant women and in 19% of the other subjects; but if normality is defined as maintenance of adequate iron stores for erythropoiesis, the prevalence of iron deficiency was zero in the pregnant women and 2% in the other subjects.     

冠心病患者血清介导胆固醇流出的变化

目的 探讨冠心病患者胆固醇流出能力的差异,为冠心病的防治提供新方法.方法 检测正常对照组、稳定型冠心病患者(SAP组)、急性冠脉综合征(ACS组)患者的血脂水平及血清胆固醇流出能力.结果 与对照组比较,SAP组、ACS组患者血脂水平差异无统计学意义(P>0.05),但胆固醇流出能力明显降低(P<0.01);与SAP组比较,ACS组血清介导胆固醇流出率也明显降低(P<0.05).结论 胆固醇流出能力可作为独立指标,预测冠心病的发生及并发症的出现.     

血浆铁蛋白、铁代谢基因与冠心病的相关性分析

目的:分析总结冠心病与血浆铁蛋白(FT)及铁代谢基因(HFE)的相关性。方法:以30例健康者为对照组,以30例稳定性心绞痛(SAP)患者为SAP组,以30例患不稳定心绞痛(UA)患者为UA组,以30例急性心肌梗塞(AMI)患者为AMI组。分析4组患者间FT含量及HFE阳性表达率的差异,并对各组患者的FT含量及HFE阳性表达率与冠心病相关性进行分析。结果:4组研究对象间,AMI组患者的FT含量最高(P<0.05);4组研究对象间HFE阳性表达率比较无统计学差异(P>0.05);FT含量与冠心病存在相关性(P<0.05),HFE阳性表达率与冠心病无相关性(P>0.05)。结论:FT含量与冠心病存在相关性。     

维持性血液透析患者血清铁蛋白的水平及相关因素分析

[目的]回顾分析本透析中心53例维持性血液透析(maintenance hemodialysis, MHD)患者血清铁蛋白(serum ferritin, SF)水平及相关因素,探寻SF与主动脉硬化和营养状态的关系。[方法]选择本透析中心接受MHD的53例患者,观察SF的水平;比较SF与透析时间、C反应蛋白(C-reactive protein, CRP)、血清钙(serum calcium, Ca)、血清磷(serum inorganic phosphrus, P)、血清钙磷乘积、血浆白蛋白(plasma albumin, ALB)和甲状旁腺激素(parathyroid hormone, iPTH)等指标的相关性。对SF与主动脉硬化进行二元logistic回归分析。 [结果]①SF≥500 ng/ml 为25例,占总数47.17%,其中68%患者存在主动脉硬化;500ng/ml >SF≥200ng/ml 为8例,占总数 15.09%,25%患者存在主动脉硬化;SF<200 ng/ml为20例,占总数37.74%,30%患者存在主动脉硬化。Logistic回归分析显示铁蛋白升高是主动脉硬化的独立危险因素(p=0.017, OR=1.001, 95%CI=1.000~1.002)。②予停止补充铁剂半年,SF明显下降(p<0.05)。③通过Spearman秩相关分析,SF与透析时间、钙磷乘积、ALB呈正相关,相关系数分别为(r=0.554, p<0.001)、(r=0.304, p<0.05)、(r=0.435, p<0.05)。而SF与CRP、Ca、P、iPTH无明显相关性。[结论]①约50%的MHD患者SF高于500 ng/ml,铁蛋白升高是主动脉硬化的独立危险因素。②补充铁剂是MHD患者SF升高的重要因素。③SF与透析时间和钙磷乘积明显相关。④SF与患者营养状态相关,因此最合适范围为200ng/ml-500ng/ml。     

紫绀型先天性心脏病患儿血清铁及总铁结合力的变化及意义

目的检测紫绀型先天性心脏病患儿血红蛋白、平均红细胞压积、血清铁、总铁结合力及心肌组织铁分布的改变,并探讨其意义。方法入组2011年5-11月于新桥医院心外科行手术治疗的先天性心脏病患儿22例,其中男性14例,女性8例,紫绀型先天性心脏病患儿10例,非紫绀先天性心脏病患儿12例。以静脉血为标本,送本院检验科检验血红蛋白及平均红细胞压积,以亚铁嗪法检测血清铁及总铁结合力,以术中右室流出道心肌为标本,Perls-DAB法检测心肌组织中铁的分布。结果与非紫绀组患儿相比,紫绀组先心病患儿血红蛋白含量及平均红细胞压积都明显升高(P<0.05)。紫绀先天性心脏病患儿血清铁含量明显低于非紫绀患儿[(23.25±4.4)μmol/L vs(31.34±4.2)μmol/L,P<0.01],并伴有总铁结合力的增加[(69.59±5.8)μmol/L vs(52.67±9.2)μmol/L,P<0.01]。紫绀组患儿心肌组织中铁含量明显增加(P<0.01),广泛分布于心肌中。结论紫绀先天性心脏病患儿机体处于铁储备相对缺乏状态,而心肌组织内铁含量增加可能为心肌在缺氧环境下的代偿反应。     

贫血患者血清铁铁蛋白细胞内外铁检测结果分析

目的探讨各类贫血患者血清铁、铁蛋白和骨髓细胞内外铁含量多或寡与贫血症的相互关系.方法应用比色法、放射免疫法和普鲁士兰反应法检测186例各种贫血患者血清铁、铁蛋白浓度和细胞内外铁粒、铁小珠的含量.结果急、慢性白血病贫血、再生障碍性贫血、铁粒幼红细胞性贫血、溶血性贫血、巨幼红细胞性贫血患者血清铁浓度升高;肾性贫血、肝性贫血、缺铁性贫血、肿瘤性贫血、骨髓增生异常综合症(MDS-RA)患者血清铁下降;铁蛋白增高主要见于急、慢性白血病贫血和铁粒幼红细胞性贫血、肿瘤性贫血及骨髓增生异常综合症等;细胞内外铁颗粒减少和外铁消失主要见于缺铁性贫血和肾性贫血.结论检测血清铁、铁蛋白和细胞内外铁能灵敏地反映机体铁的贮存和利用水平;恶性肿瘤或其它细胞快速增殖时,细胞合成铁蛋白的能力较强.     

Changes of serum iron and total iron-binding capacity of infants with cyanotic congenital heart disease

目的 检测紫绀型先天性心脏病患儿血红蛋白、平均红细胞压积、血清铁、总铁结合力及心肌组织铁分布的改变,并探讨其意义.方法 人组2011年5 -11月于新桥医院心外科行手术治疗的先天性心脏病患儿22例,其中男性14例,女性8例,紫绀型先天性心脏病患儿10例,非紫绀先天性心脏病患儿12例.以静脉血为标本,送本院检验科检验血红蛋白及平均红细胞压积,以亚铁嗪法检测血清铁及总铁结合力,以术中右室流出道心肌为标本,Perls - DAB法检测心肌组织中铁的分布.结果 与非紫绀组患儿相比,紫绀组先心病患儿血红蛋白含量及平均红细胞压积都明显升高(P＜0.05).紫绀先天性心脏病息儿血清铁含量明显低于非紫绀患儿[(23.25±4.4)μmol/L vs(31.34±4.2) μmol/L,P＜0.01],并伴有总铁结合力的增加[(69.59±5.8)μmol/L vs (52.67±9.2) μmol/L,P＜0.01].紫绀组患儿心肌组织中铁含量明显增加(P＜0.01),广泛分布于心肌中.结论 紫绀先天性心脏病患儿机体处于铁储备相对缺乏状态,而心肌组织内铁含量增加可能为心肌在缺氧环境下的代偿反应.     

肝硬变患者血清胃动素,肽YY,IgG和铁蛋白的变化

探讨肝硬变患者血清胃动素，肽ＹＹ，ＩｇＧ和铁蛋白在肝硬变时的变化及其临床意义。方法：临床确诊的肝硬变患者３５例，平均年龄（４２±７）岁，其中乙型肝炎后３１例，酒精性１例和原因不明３例。结果与对照比较，肝硬变患者血清ＭＴＬ（２０７±９８）ｎｇ／Ｌｖｓ（３１２６±１００）ｎｇ／Ｌ，（Ｐ〈０．０１），ＰＹＹ（１．１±Ｓ