[Pilot Project: Improved Lung Deposition via a New Nasal Inhalation Procedure]

Area of Science:

• Pulmonary drug delivery
• Respiratory medicine
• Aerosol science

Background:

• Effective inhaled drug delivery requires reaching the middle and small airways.
• Current methods face challenges in achieving optimal lung deposition.
• This study explores a novel trans-nasal aerosol application system combined with noninvasive pressure support ventilation.

Observation:

• A pilot study involved 7 COPD patients (GOLD stages II-III) using a radiolabeled marker.
• Two inhalation methods were compared: passive (open tube) and active (pressure support ventilation).
• Aerosol particle size was 5.5 µm, and distribution was assessed using gamma camera and scintigraphy.

Findings:

• Pressure-supported inhalation (active method) significantly increased aerosol lung deposition compared to the passive method.
• Deposition in the lung periphery was achieved even with relatively large aerosol particles (5.5 µm).

Implications:

• Trans-nasal inhalation combined with noninvasive pressure support ventilation enhances particle deposition in the lungs.
• This approach offers a promising strategy for improving inhaled therapy efficacy in respiratory diseases.
• Further research may optimize this technique for targeted drug delivery to peripheral lung regions.