Laboratory assessment of drug delivery of Beclomethasone/Formoterol metered dose inhaler (MDI) with a new valved holding chamber (VHC) designed specifically for 'on-the-go' use
Bibliographic record
Abstract
Background: VHCs / spacers are commonly prescribed for patients to aid coordination of their MDI, ensuring effective drug delivery. However, many patients do not use VHCs for their MDI medication when ‘on the go’ due to portability and appearance. This laboratory study evaluated the medication delivery performance when using a LABA (Formoterol) containing combination MDI with and without a new portable VHC (AeroChamber2Go*, A2Go). Methodology: The emitted dose was sampled to an abbreviated Andersen cascade impactor. Five actuations of beclamethasone dipropionate/formoterol fumarate (BD/FF 100/6μg/actuation; Foster*) were delivered at 30s intervals. Inhalation 0s after MDI actuation simulated perfect, but unlikely, coordination with the MDI alone. A more realistic 2s delay was investigated for the MDI/VHC system. BD/FF was subsequently recovered and assayed by HPLC. Results: The fine particle mass < 4.7μm (FPM) and large particle mass > 4.7μm (LPM) per actuation results (mean mcg +/- SD) for MDI alone and MDI/VHC are summarized below. Conclusions: The new portable VHC with a simulated 2s delay delivered similar amounts of fine particle medication (sized to be delivered to the lungs) as the MDI alone, when the MDI was tested using simulated ‘perfect’ coordination. The large particles that could be deposited in the oropharynx were reduced more than ten fold when using the A2Go compared to MDI alone. The A2Go VHC would appear to provide a patient friendly drug delivery option 9on the go9.
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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 | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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".