Can a New Portable Valved Holding Chamber (VHC) for Use on the Go Improve the Delivery and Reduce Side Effects of a New Combination Albuterol/Budesonide Inhaler?
Bibliographic record
Abstract
Abstract Rationale: The introduction of a new anti-inflammatory reliever (AIR) inhaler for the combined treatment of symptoms and prevention of bronchoconstriction may trigger changes in current practice. Asthma guidelines recommend that to further optimize MDI drug delivery and minimize potential side effects a valved holding chamber (VHC) / spacer should be used. This laboratory study compared the particle size distribution and potential airway delivery of the combined albuterol/budesonide (AIRSUPRA® (albuterol 90µg/budesonide 80µg)) metered dose inhaler (MDI) when administered alone versus an MDI + a new portable VHC (AeroChamber2go[asterisk], A2GO) and a widely prescribed standard VHC (AeroChamber Plus[asterisk] Flow-Vu[asterisk], ACFV). Methods: Particle size distribution of the active pharmaceutical ingredients (API) within the MDI, both with and without the 2 VHCs, was evaluated. This assessment was conducted using an Andersen Mark II cascade impactor, operating at a flow rate of 28.3 L/min, with five replicate measurements performed for each condition. HPLC was used to quantify the mass of each API in each size fraction. Our analysis focused on the fine particle mass (FPM, <4.7 µm), the portion expected to reach the lungs, and the coarse particle mass (CPM, >4.7 µm), likely to deposit in the upper airways. Results: Data are presented as µg (mean±sd) FPM was similar between the MDI alone and either of the VHCs. Delivery ranged from 30.6-32.8µg/36.9-38.5µg (BUD/ALB) for MDI+VHC to 28.6±1.5µg/34.1±1.7µg for the MDI alone. CPM for BUD was 42.6±1.7µg for the MDI alone and reduced to 8.7-12.0µg with the addition of the VHCs. Conclusion: This study showed that the AeroChamber2go[asterisk] and AeroChamber Plus[asterisk] Flow-Vu[asterisk] VHCs provided similar FPM, compared to the MDI alone. Additionally, the VHCs reduced the CPM associated with oropharyngeal deposition, which could be particularly important with inhaled corticosteroids like budesonide. If deposited in the oropharyngeal region, absorption into the bloodstream increases the potential for systemic side effects. This reduction in upper airway deposition should help lessen concerns about systemic steroid delivery perhaps improving adherence to therapy while lowering the risk of unwanted systemic side effects.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".