急性左心衰竭患者动脉血红细胞内外pH值的变化  

Significance of pH changes of arterial blood in patients with acute left heart failure

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作  者:董丽妍[1] 温武金[1] 李志芳[1] 

机构地区:[1]广州医科大学附属深圳沙井医院内二科,518104

出  处:《中国综合临床》2014年第10期1015-1017,共3页Clinical Medicine of China

基  金:深圳市宝安区科技计划项目(2012168)

摘  要:目的 探讨急性左心衰竭患者动脉血红细胞内外pH值的变化.方法 急性左心衰竭患者38例,给予利尿、强心、扩张血管、减轻心脏负荷、纠正水电解质紊乱等常规治疗,并行面罩吸氧,呼吸机模式同步间歇指令通气模式,如低氧血症未获得明显改善,则加用呼气末正压通气治疗.结果 治疗后患者pH值、心率、呼吸频率、动脉血氧分压(PaO2)、动脉血二氧化碳分压(PaCO2)和平均动脉压(MAP)较治疗前均有明显改善[7.4±0.3、7.1±0.1,(86.3±6.2)、(118.3±8.2)次/min,(22.5±4.8)、(36.2±7.1)次/min,(84.8±7.3)、(47.2±6.6) mmHg,(43.3 ±5.5)、(48.3±5.2) mmHg,(81.1±3.2)、(96.2±4.5) mmHg],差异均有统计学意义(t值分别为5.848、19.188、9.854、23.552、4.072、16.857,P均<0.01).随着治疗的进展,患者红细胞外pH值和细胞内pH值(pHi值)均上升趋势,经回归分析pHi随着pH的升高而增加,两者间存在正相关性,回归方程:Y=-0.5594+1.1037X.结论 急性左心衰竭患者发病时血液内酸碱水平异常,致血红细胞内的pH值相应变化,进而造成动脉血红细胞载氧能力改变,降低细胞通过毛细血管的能力,患者体内气体交换水平下降,引发乏氧,治疗时应考虑同时进行机体内酸碱失衡状态的改善.Objective To investigate the pH changes of arterial blood in patients with acute left heart failure.Methods Thirty-eight patients with acute left heart failure were selected as our subjects,who all underwent diuresis,the strong heart diuresis,dilation of blood vessels,reducing the load on the heart,and making water and electrolyte balance of conventional medication,and then parallel oxygen mask,respirator mode synchronized intermittent mandatory ventilation(SIMV).If hypoxia was not significantly improved,and positive pressure ventilation with end expiratory(PEEP) treatment was conducted.Results After treatment,the level of pH,heart rate(HR),breathing rate(RR),arterial partial pressure of oxygen(PaO2),arterial partial pressure of carbon dioxide(PaCO2) and mean arterial pressure(MAP) were (7.4 ± 0.3,86.3 ± 6.2) times/min,(22.5 ±4.8) times/min,(84.8 ±7.3) mmHg,(43.3 ±5.5) mmHg,(81.1 ±3.2) mmHg,different from those before treatment(7.1 ±0.1),(118.3 ±8.2) times/min,(36.2 ±7.1) times/min,(47.2 ±6.6) mmHg,(48.3 ±5.2) mmHg,(96.2 ±4.5) mmHg),and the differences were significant (t =5.848,19.188,9.854,23.552,4.072,16.857 respectively; P 〈 0.01).With the progress of treatment,pH value and pHi value in patients showed a rising trend.Regression analysis showed a positive correlation and the regression equation was Y =-0.559 4 + 1.103 7X.Conclusion Patients with acute left heart failure show abnormal blood pH level and the corresponding change inside red blood cells.Then it causes changes in arterial blood oxygen carrying capacity of red blood cells,reduces the cell through the capillary capacity.Therefore,it can result in decrease of gas exchange levels in patients and hypoxia.Treatment should be considered imbalance the body of the improved state of acid-base.

关 键 词:急性左心衰竭 动脉血红细胞 PH值 载氧能力 

分 类 号:R541.6[医药卫生—心血管疾病]

 

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