Effect of Different Velocity of Inspiratory Flow on the Severe Asthma Patients with Mechanaical Ventilation
- VernacularTitle:不同吸气流速机械通气对重症哮喘病人呼吸的影响
- Author:
Guohui LI
;
Kun FANG
;
Zhanli SHI
- Publication Type:Journal Article
- Keywords:
Velocity of flow;
Mechanical ventilation;
Asthma
- From:
Journal of Medical Research
2006;0(11):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the effect of velocity of inspiratory flow on the severe asthma patients.Methods Twenty patients were ventilated thirty minutes respectively when the peak velocity of flow was 40L/min,60 L/min,80 L/min,100 L/min and 120 L/min,and then we measured their airway peak pressure(Ppeak),plateau pressure(Pplat)and intrinsic positive end expiratory pressure(PEEPi)and arterial blood gas analysis,accounting shunt fraction(QS/QT)and Dead space value(VD/VT).Results When velocity of flow enhanced from 40L/min to 60L/min,Ppeak increased while Pplat,PEEPi,VD/VT decreased obviously.When velocity of flow enhanced from 60L/min to 80L/min,Ppeak increased also but Pplat,PEEPi,QS/QT and VD/VT changed no significant.When velocity of flow enhanced from 60L/min to 100L/min,Pplat and PEEPi increased indistinctly while Ppeak,QS/QT and VD/VT increased distinctly.Conclusions The velocity of inspiratory flow,60~80L /min,can reduce PEEPi、QS/QT 及VD/VT and improve respiratory status.
