We have located links that may give you full text access.
A STUDY OF INSPIRATORY RESISTANCE OF DRY POWDER INHALER OF AGENTS FOR ASTHMA CONTROL.
Arerugī = [Allergy] 2016 July
OBJECTIVE: Because dry powder inhalers (DPI) aerosolize agents by means of inspiration of patients themselves, inspiratory resistance of DPI is an important factor for increasing inhalation efficiency. Therefore, we measured inspiratory resistance of DPI of agents for asthma control.
METHODS: Using Flow/Volume Simulator, when setting flow rates at 6, 30, 60, 90, and 120L/min, we read off suction pressures and find inspiratory resistances by calculation (=suction pressure/flow rate) at each flow rate.
RESULTS: In all DPI, inspiratory resistance increases with the increasing flow rate. To maintain flow rate of 60L/min, suction pressure of around 20-cmH2O for Diskus(®) and Ellipta(®), between 35- and 45-cmH2O for Turbuhaler (®), and about 60-cmH2O for Twisthaler(®) were needed.
CONCLUSION: It is suggested that we should instruct patients to inhaler DPI based on inspiratory resistance of the DPI.
METHODS: Using Flow/Volume Simulator, when setting flow rates at 6, 30, 60, 90, and 120L/min, we read off suction pressures and find inspiratory resistances by calculation (=suction pressure/flow rate) at each flow rate.
RESULTS: In all DPI, inspiratory resistance increases with the increasing flow rate. To maintain flow rate of 60L/min, suction pressure of around 20-cmH2O for Diskus(®) and Ellipta(®), between 35- and 45-cmH2O for Turbuhaler (®), and about 60-cmH2O for Twisthaler(®) were needed.
CONCLUSION: It is suggested that we should instruct patients to inhaler DPI based on inspiratory resistance of the DPI.
Full text links
Get seemless 1-tap access through your institution/university
For the best experience, use the Read mobile app
All material on this website is protected by copyright, Copyright © 1994-2024 by WebMD LLC.
This website also contains material copyrighted by 3rd parties.
By using this service, you agree to our terms of use and privacy policy.
Your Privacy Choices
You can now claim free CME credits for this literature searchClaim now
Get seemless 1-tap access through your institution/university
For the best experience, use the Read mobile app