Blood and plasma volumes determined by carbon monoxide gas, 99mTc-labelled erythrocytes, 125I-albumin and the T 1824 technique

The total amount of circulating haemoglobin was measured in 12 subjects using a direct carbon monoxide (CO)-technique. O2 plus 50 ml CO gas was rebreathed in a small closed system for 10 min. Carboxyhaemoglobin (HbCO)% was measured with a diode-array spectrophotometer before and after the rebreathing. delta HBCO% and the amount of CO in moles (nCO) were used to calculate the total amount of circulating haemoglobin. Blood volume was calculated by dividing this figure with the haemoglobin concentration and plasma volume by multiplying the blood volume with 1-haematocrit. The calculated blood and plasma volumes were compared with the simultaneously measured volumes by 99mTc-labelled erythrocytes, 125I-albumin and T 1824 (Evans Blue). Mean blood volume determined with CO was 4557 ml (3251-6576 ml) compared with 4527 ml (3390-6527 ml) with 99mTc-labelled erythrocytes (r = 0.97). Mean plasma volume by T 1824 was 2895 ml (1972-3658 ml) vs 2898 ml (1815-3714) ml using 125I-albumin, (r = 0.99). The plasma volumes calculated from the blood volumes determined by the erythrocyte-labelling methods were 5-10% lower than those measured with labelled albumin. There was a better correlation between the plasma volumes by the albumin methods and by the CO-technique (r = 0.98 and r = 0.97, respectively) than between the plasma volumes by the albumin methods and by 99mTc-erythrocytes (r = 0.90 and r = 0.87, respectively).     

^99mTc—HL91乏氧显像与^99mTc—MIBI亲肿瘤显像诊断肺肿瘤的对比分析

目的：评价^99mTc—HL91乏氧显像和^99mTc—MIBI亲肿瘤显像诊断肺癌的临床价值。方法：70例肺肿瘤患行^99mTc-HL91乏氧显像和^99mTc—MIBI亲肿瘤显像两项检查，对比分析诊断效能和半定量分析结果。结果：^99mTc—HL91乏氧显像和^99mTc—MIBI亲肿瘤显像诊断肺癌的灵敏度、特异性和准确率分别为91．1％、100％、94．3％和84．4％、76.0％、81．4％。半定量分析结果明显高于^99mTc—MIBI亲肿瘤显像。两种显像结合诊断肺癌的灵敏度、特异性和准确率分别为95．6％、100％、97．1％。结论：^99mTc—HL91乏氧显像诊断肺癌有较高的临床价值，结合^99mTc—MIBI亲肿瘤显像可进一步提高诊断的准确性。     

Estimated plasma volume status (ePVS) could be an easy-to-use clinical tool to determine the risk of sepsis or death in patients with fever

IntroductionCapillary permeability can be increased in patients with sepsis. Indirect estimation of plasma volume status (ePVS) could identify more severely ill patients with fever.Methods1502 patients evaluated for fever at the Emergency Department (ED) of Merano General Hospital (Italy) between June 1, 2018 and May 30, 2019. The ePVS value registered on ED admission and derived from complete blood count was considered. Associations between the ePVS value and the two outcomes of the study (30-day mortality and sepsis diagnosis) were studied.ResultsFifty-one of 1502 patients (3.4%) died at 30 days and 5.3% (80/1502) had a diagnosis of sepsis. The median ePVS in patients who died was higher than in those who survived (6.01 dL/g vs 4.49 dL/g, p < .001). In the multivariate analysis, ePVS higher than 4.52 dL/g presented an OR of 2.717 (CI95% 1.103–6.692, p = .020) for 30-day mortality and 1.824 (CI95% 1.055–3.154, p = .030) for the diagnosis of sepsis. ePVS presented a significant improvement in reclassification of the usual evaluation of patients with fever (NRI 21.6% for 30-day mortality and NRI 19.7 for sepsis diagnosis, p < .001).ConclusionThe ePVS value was a useful additional predictive tool to assess the severity of illness in patients with fever.     

~(99m)Tc-MIBI显像在甲状腺结节诊断中的应用研究

目的探讨^99mTcO4-／^99mTc-MIBI联合显像在甲状腺结节术前诊断中的应用价值。方法^99mTc-MIBI显像检查的住院病人104例，结合病理及显像结果，计算阳性预测率和阴性预测率。结果^99mTc—MIBI显像阳性对甲状腺癌的阳性预测率为47．5％，显像阴性对甲状腺癌的阴性预测率为96．9％。结论^99mTc-MIBI甲状腺显像对甲状腺结节良恶性仍有较高的诊断价值。可以作为其他影像资料的有益补充。     

~(99m)Tc－EC肾动态显像及有效血浆流量测定的临床应用

应用９９ｍＴｃ－ＥＣ对１３例正常人和９０例各种肾疾患病人进行肾动态显像，同时获得有效血浆流量（ＥＲＰＰ），肾血流灌注，肾图及肾动态显像等资料。结果表明：９９ｍＴｃ－ＥＣ图像清晰。１３例正常人ＥＲＰＦ为４１８．５４±７３．３２，慢性肾实质性疾病、原发性高血压、肾性高血压、泌尿系结石病人的ＥＲＰＦ较正常组减低，肾功能和肾血流灌注也有不同程度下降，肾性高血压的ＥＲＰＦ低于原发性高血压。９９ｍＴｃ－ＥＣ肾动态显像是一项无创伤性和简便安全的肾功能检查方法。     

原发性肺癌的~（99m）TC─MIBI SPECT的初步研究

本文描述了２３例原发性肺癌的９９ｍＴＣ─ＭＩＢＩＳＰＥＣＴ的表现。与胸椎的放射性浓聚相比，将肺部病变的放射性浓聚分为：Ⅰ、Ⅱ、Ⅲ、Ⅳ四级。在本组病例中，肺癌病变的放射性的浓聚均在Ⅱ级以上，其中，Ⅲ到Ⅳ病例数占病例总数的７８％。ＳＰＥＣＴ可清楚显示肺癌纵隔转移灶，敏感度和特异度分别为８３．３％和８０％。肺癌病变的平均放射性摄取比值为２．２８，鳞癌稍高于腺癌。