静脉注射多巴胺药物时的血管保护

多巴胺作为抢救用药，在治疗急性心肌梗死、心力衰竭和休克等低血压时，应用十分广泛。多巴胺、多巴酚丁胺能增强心肌收缩力，增加心输出量、舒张肾血管，使肾血流量增加，肾小球滤过率增加，尿量增多，纠正低血压，改善肾功能。临床工作中发现，长时间静脉维持多巴胺、多巴酚丁胺类药物后，即使穿刺部位无渗漏，皮肤也可先出现发白，继而出现皮肤红肿，局部静脉及组织出现病理性损伤等情况，而且持续12h后，上皮细胞坏死率明显增高。临床观察认为4～8h为相对安全期。我们在临床工作中，为防止因静脉注射多巴胺不慎引起血管损伤给患者带来痛苦，进行了以下保护措施。     

REGULATING FUNCTION OF COENZYMIZATION AND DECOENZYMIZATION OF THE LACTATE DEHYDROGENASE ISOZYMES IN THE MOUSE TISSUES DURING HYPOXIA

Objective. To study the characteristics of changes of LDH enzyme patterns of mice under slight hypoxia.Methods. Mice treated with artificial hypoxia, various tissues were made for the test of LDH enzymatic activity by the specific staining technique. LDH (1 -5) relative percentage enzymatic activity (RPEA) were measured with CS-910 dual-wavelength thin layer chromatography scanner.Results. The RPEA of LDH isozymes of various tissues after slight hypoxia shifted to the isozymes LDH1 and LDH2, whose principal subunits are H subunits, and the RPEA of LDH,(H4), LDH2(H3M) increased, while RPEA of LDH5(M4) in various tissues decreased prominently except the cardiac muscle, and that of LDH4(HM3) decreased as well. After polyacrylamide gel electrophoresis (PAGE) of the hypoxia treated cardiac muscle specimen was made, activity subbands originated regularly in the isozyme patterns of LDH, with the regularity of LDH1 (0 subband), LDH2 (0-1 subbands), LDH3 (0-2 subbands), LDH4 (1-3 subbands), LDH5 (2-4 subbands).     

缬氨酸对肝昏迷兔血浆支链α-酮酸的影响

报告了用气相色谱法测定血浆支链酮酸(Branched-ChainKetoAcids;BCKA’s)浓度,以及静脉输注高浓度L-缬氨酸(L-valine,val)治疗半乳糖胺引起兔肝昏迷(HepaticComa;　HC)的结果。HC兔血浆BCKA’S明显低于正常组水平,相对应的支链氨基酸(Branched-Ghain　Amino　acids;BCAA’S)及其它氨基酸多数增高,芳香族氨基酸(AromaticAminoAcids;AAA'S)大幅度升高,用5%val静脉输注48h,血浆BCKA’S提高约3倍,BCAA’S改变不大,AAA’S下降37%;血浆BCKA’S/BCAA’S、BCAA’S/AAA’S比值也明显增高。提示,高浓度val能纠正HC血浆BCKA’S及主要氨基酸紊乱。     

甜蜜孕期 美妙心跳

21世纪的准妈妈们越来越时尚，更懂得追求健康完美的生活方式。比起母辈，我们已经摒弃了许多旧俗、不健康的习惯，但在性生活方面，却因为种种原因，老套的观念、对孕期性生活的无知，都造就了始终无法正确地面对、接受的局面，更不用说享受。     

脑干卒中31例临床分析

脑干卒中是脑血管病中的危重病，临床表现复杂，预后差。随着CT与MRI的广泛应用，现已能对其进行迅速而准确的诊断。为进一步认识该病特点，现对31例脑干卒中患者进行临床分析，报道如下。     

色素失禁症一家系三例

先证者（Ⅵ2）女，6个月，汉族。因“全身出现条状花纹色斑伴水疱6个月”就诊。患儿出生时四肢即有线状及小片红斑，随后皮疹范围逐渐扩大，渐累及到胸背部及外阴。10周后在少数红斑的基础上出现水疱、大疱，数日后水疱干涸、结痂，脱落后留有不规则或涡轮状褐色斑，且在双足底留有疣状增生。患儿系第2胎第1产，足月顺产，Apgar评分8分。父母非近亲结婚。