New Nasal Interface to Improve Breath Detection From Pulsed Oxygen Sources: Healthy Participant Study
Notice bibliographique
Résumé
Background: Pulsed oxygen sources rely on pressure triggering to detect inhalation: during inhalation, room air entrainment creates a small drop in pressure monitored through the cannula tubing, referred to herein as the signal pressure. When the signal pressure exceeds the triggering threshold of a pulsed-flow oxygen device, a pulse of oxygen is released. Patients may struggle to trigger oxygen delivery during sleep, oral breathing, or other circumstances characterized by low nasal inhalation flows. To address this issue, a new nasal interface that can provide higher and more consistent signal pressures is being developed. Methods: Eight volunteers ranging from 22-47 years old participated in the study. Each volunteer was asked to breathe at different flows through their nose while connected to an oxygen tank with a Philips SimplyGo Mini POC, an OxyGo Next POC via standard nasal cannula, or the new nasal interface. A Precision Medical Easy Pulse 5+6 oxygen conserving device was used with the tank. To monitor flows, a respiratory belt (Respiration Sensor, TTLP2HRVSYS, Bio-medical Instruments, MI) was strapped around each participant’s chest. The respiratory belt was calibrated using spirometer data (MicroLoop Spirometer, #ML3535-S, Micro Medical, ME). Tests were repeated while participants breathed through their mouths. Video recordings with a close-up view of the oxygen sources were used to detect pulse triggering. Each participant breath was retroactively matched with a pulse/no pulse response, and the number of pulses was divided by the number of breaths to calculate triggering success rates. A two-tailed t-test (P <.05) was conducted with triggering success rate as the dependent variable and cannula type as the independent variable. Ethics approval was granted by the NAIT Research Ethics Board. Results: Pooled across all study conditions, triggering success rates were significantly higher (P = .03) when using the new nasal interface (78.9%) compared to the standard nasal cannula (65.2%). When using a standard nasal cannula during oral breathing, mean triggering success rates were below 40% for all oxygen sources. Using the new nasal interface approximately doubled oral breathing triggering success rates. Conclusions: Reliable breath detection is an issue when using pulsed-flow oxygen sources, especially during oral breathing. Significantly improved breath detection was observed when healthy participants used the new nasal interface versus a standard nasal cannula.Figure 1: Average triggering success rates (%) when using a Standard Cannula and the New Nasal Interface. Error bars represent standard deviations. Data is pooled across all breathing patterns and oxygen sources.Figure 2: Triggering Success Rates during Oral Breathing sorted based on Cannula Type and Oxygen Source. Error bars represent standard errors.
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Comment cette classification a été obtenuedéplier
Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,000 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule tête enseignante, pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».