Results ( 1 ) the positive rate of dmf . rheogram in phd with and without respiratory failure are 75 and 21 . 9 respectively . ( 2 ) the positve rate in phd with and without heart failue are 80 and 46 . 3 respectively . ( 3 ) the mean values of various parameters of ipg in positive and negative dmf rheogram have no significant difference . conclusion respiratory failure and heart falure in phd are closely correlated with dmf 结果( 1 )肺心病伴与不伴呼衰组膈肌疲劳图形阳性率分别为75与21 . 9 ； ( 2 )肺心病伴与不伴心衰组膈肌疲劳图形阳性率分别为80与46 . 3 ； ( 3 )膈肌疲劳阳性组与阴性组肺阻抗图各参数均值无显著性差异。
46da , respectively . the sequences of the two toxins are determined and found to consist of 34 and 36 amino acid residues , respectively . both of the two sequences include six cys residues , which form three disulphide bonds . jztx - can block neuromuscular transmission in an isolated mouse phrenic nerve diaphragm Jztx -对电刺激诱导的小鼠膈神经-膈肌收缩产生抑制作用，浓度为1 . 0 10 ~ ( - 6 ) mol / l时的阻断时间为15分钟左右，对钠通道和延迟调整型钾通道的激活和失活没有影响。
A number of conditions causing inadequate entilation ( airway obstruction , pneumonia atelectasis , pleural effusion , and hypoentilation due to the pain of abdominal incisions or to abdominal distention limiting diaphragmatic excursion ) may exist singly or in combination to produce respiratory acidosis 许多导致通气不足的病变（呼吸道梗阻，肺炎性肺不张，胸腔积液，腹部切口疼痛或者腹胀限制了膈肌的运动等引起的低通气）可以单独存在，也可以合并与其它病变而导致呼吸性酸中毒。
