Visualization of flumes from pharmaceutical delivery devices

Area of Science:

• Pharmacology and Drug Delivery
• Biomedical Imaging
• Aerosol Science

Background:

• Drug efficacy depends on spray characteristics for intranasal and inhalation delivery.
• Visualizing these sprays is essential for understanding and optimizing drug administration.
• Existing photographic methods have limitations in capturing transient spray dynamics.

Purpose of the Study:

• To introduce a novel multi-exposure photographic system for visualizing drug spray plumes.
• To detail the methodology for capturing individual spray flumes over their entire duration.
• To demonstrate the application of this technique using a glass model of the nasal passage.

Main Methods:

• Development of a multi-exposure photographic system capable of recording at pre-set intervals.
• Application of the system to capture individual spray flumes within a typical 250 ms duration.
• Utilizing a glass model nose to visualize spray behavior within the nasal cavity.

Main Results:

• The system successfully records individual spray flumes with high temporal resolution.
• Detailed visualization of spray characteristics, including plume dynamics, is achieved.
• The technique allows for the assessment of spray behavior within a simulated nasal environment.

Conclusions:

• The developed multi-exposure photographic system provides enhanced visualization of drug sprays.
• This technique aids in understanding and optimizing drug delivery for intranasal and inhalation therapies.
• The method is valuable for improving the design and efficacy of spray-based medications.