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   Lower back-up rates improve ventilator triggering during assist-control ventilation: a randomized crossover trial  
   
نویسنده Wheeler K I ,Morley C J ,Hooper S B ,Davis P G
منبع journal of perinatology - 2012 - دوره : 32 - شماره : 2 - صفحه:111 -116
چکیده    Objective:the objective of this study is to compare the effects of back-up ventilation rates (burs) on triggered inflations and patient cardiorespiratory stability during assist-control/volume guarantee ventilation (ac/vg).study design:this study is a randomized crossover trial conducted in a neonatal unit in an australian tertiary nicu. in all, 26 stable preterm infants on ac/vg ventilation were studied at bur settings of 30, 40 and 50 min−1. inflation rate, triggering and cardiorespiratory measures of patient stability were compared during 20 min epochs with 10 min washout periods.result:the 26 infants studied were median (inter-quartile range) gestational age 27 (26, 30) weeks, birth weight 0.84 (0.75, 1.14) kg and fio2 0.24 (0.21, 0.31) and age 6 (4, 19) days. at burs of 30, 40 and 50, the proportions of inflations, which were triggered, were mean (s.d.) 85% (11), 75% (19) and 61% (25); p<0.01 for all comparisons. total delivered inflation rates were 56 (8), 58 (9) and 62 (8) min−1, respectively. cardiorespiratory parameters did not vary between the settings.conclusion:using a lower bur allows greater triggering of ventilator inflations. cardiorespiratory parameters including co2 levels were stable at all rates.
آدرس The Royal Women's Hospital, Australia. Monash University, Australia. Murdoch Children's Research Institute, Australia, The Royal Women's Hospital, Australia, Monash University, Australia, The Royal Women's Hospital, Australia. Murdoch Children's Research Institute, Australia. University of Melbourne, Department of Obstetrics and Gynaecology, Australia
 
     
   
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