Feasibility of a Wireless Vital Signal Monitoring System in the NICU
Notice bibliographique
Résumé
In the Neonatal Intensive Care Unit (NICU), vital signs are monitored continuously via skin sensors connected to bedside monitors using wires and cables. This may interfere with patient care and increase the risks of skin damage, and infection. Wires may also tangle around the body. Recently, a wireless system called ANNE® One (Sibel Health, Chicago, USA) was developed, and investigated in a pilot study at the Montreal Children’s Hospital. 25 neonates with a median gestational age at birth of 28 weeks (IQR: 26-31 weeks) were monitored simultaneously by this wireless system and a wired reference monitor (Intellivue MX450, Philips Healthcare, Best, Netherlands) for 8 hours a day, on 4 consecutive days. To assess the feasibility of using this wireless monitoring system in the NICU, we examined the coverage (defined as the percentage of time for which signal values were available with respect to total record length) of three vitals signs: heart rate (HR), oxygen saturation (SpO2) and respiratory rate (RR). The coverage of HR and SpO2were further compared to that of corresponding electrocardiograms (ECGs) and photoplethysmograms (PPGs), respectively. We found the coverage of wired vital recordings to be 99% for HR, 94% for SpO2, and 97% for RR. In the wireless system, coverage was significantly lower for all three vitals: 86% for HR (compared to 94% in ECG), 66% for SpO2(compared to 99% in PPG), and 47% for RR. To investigate the reason for wireless gaps - defined as continuous periods with no signal for 1.25 seconds (equivalent to one missed sample) or more - we correlated them with automatically generated alert signals and manually recorded annotations. The alerts tracked wireless sensor functionality, including Bluetooth disconnection and drops in signal intensity; annotations tracked interactions between the infant and parents or healthcare professionals during recordings. We found: (1) 91% of gaps in wireless HR recordings were correlated with alert flags, with 56% linked to Bluetooth disconnections (67% of which occurred during kangaroo care); (2) only 10% of SpO2gaps and 25% of RR gaps were correlated with alerts; and (3) only 49% of gaps in SpO2and 34% in RR coincided with annotated activities. More investigations to explain the widespread occurrence of gaps in SpO2and RR signals are necessary. For this reason, future work will examine the relations of: (1) movement artifact, (2) signal-to-noise ratio, and (3) the algorithms used to display SpO2and RR, on gap classification with the use of the ANNE® system. At present, the coverage issues, especially in SpO2and RR, limit the feasibility of wireless vital sign monitoring in the NICU, but our results pinpoint key areas of improvement to be addressed.
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Comment cette classification a été obtenuedéplier
Prédiction machine sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Le volet Gemma est une étiquette directe du modèle pour chaque travail de la base, lue sur la notice réduite au titre. Le volet Codex est un classifieur appris des 10 348 étiquettes directes de Codex et calibré sur les taux pondérés de l'échantillon; les champs sans appui suffisant ne portent aucun appel Codex. Le mode candidate est l'union des deux volets; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont pas des étiquettes humaines.
Scores du classifieur distillé par catégorie (deux têtes)
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,006 | 0,017 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,001 | 0,000 |
| Bibliométrie | 0,001 | 0,000 |
| Études des sciences et des technologies | 0,001 | 0,001 |
| Communication savante | 0,001 | 0,001 |
| Science ouverte | 0,002 | 0,001 |
| Intégrité de la recherche | 0,001 | 0,001 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,002 | 0,001 |
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 source (Gemma direct ou Codex distillé), 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 ».