Development of an Intelligent Spacer Data Logger System.

Area of Science:

• Respiratory medicine
• Pharmacology
• Medical device technology

Background:

• Pressurized metered dose inhalers (pMDIs) with spacer devices are common but patient technique varies.
• Inappropriate use can lead to suboptimal drug delivery and treatment outcomes.
• A novel Spacer Data Logger was developed to monitor pMDI and spacer usage.

Purpose of the Study:

• To assess the efficacy of the Spacer Data Logger in accurately measuring key aspects of pMDI-spacer use.
• To evaluate the impact of technique variations on inhaled medication availability.

Main Methods:

• The Spacer Data Logger's ability to record pMDI shaking, actuation timing, and inhaled aerosol volume was evaluated.
• Studies used varying strengths of beclomethasone dipropionate and fluticasone propionate.
• The effects of delayed actuation post-shaking and delayed inhalation post-actuation were investigated.

Main Results:

• The Spacer Data Logger demonstrated high agreement with reference volumes.
• Delayed actuation after shaking significantly impacted available dose for certain inhaler strengths.
• Delayed inhalation post-actuation led to a consistent decrease in available medication.

Conclusions:

• Correct pMDI-spacer technique, including immediate actuation after shaking and prompt inhalation, is vital for maximizing inhaled dose.
• The Spacer Data Logger is a valuable tool for assessing patient adherence and optimizing pMDI-spacer use in asthma and COPD patients.