Comparing Cervical Spine Motion With Different Halo Devices in a Cadaveric Cervical Instability Model
Notice bibliographique
Résumé
In Brief Study Design. Biomechanical evaluation of conventional and noninvasive halos in cadaveric C1–C2 and C5–C6 instability models. Objective. To compare the ability of a conventional halo and noninvasive halo (NIH) to immobilize the unstable cervical spine at the C1–C2 and C5–C6 levels. Summary of Background Data. Many successful outcomes have been reported in cervical spine injury treatment with the conventional halo (CH); however, complications related to pin sites have been reported. The NIH was designed to overcome these complications. To date, no investigation has compared the biomechanical efficacy of the NIH with that of the CH in restricting three-dimensional cervical spine motion. Methods. A global instability was created at the C1–C2 level in 4 cadavers and at C5–C6 in 4 others. Relative motion was measured between the superior and inferior vertebrae during the donning process, execution of the log roll technique, and during the process of sitting up. This testing sequence was followed for all treatment conditions. Results. During the application of the orthoses there was a significant increase in motion at C1–C2 instability and a trend toward increased motion at the C5–C6 instability with CH compared with NIH. In the log roll maneuver, the CH and NIH restrict motion to a similar degree at the C1–C2 instability level, except in frontal plane translation, where CH immobilizes the segment to a greater extent. For the C5–C6 instability the CH provides significantly better immobilization for lateral bending and axial translation. No significant differences were found between the NIH and CH for the sit-up maneuver at either of the levels. Conclusion. Donning of the NIH generates significantly less cervical spine motion than application of the CH. The CH provides superior immobilization for a C5–C6 instability during the log roll maneuver and a C1–C2 instability in the frontal plane during the log-roll maneuver. The CH and NIH immobilize the C1–C2 and C5–C6 instability to a similar degree during the sit-up maneuver. The biomechanics of immobilization with conventional and a noninvasive halos were compared during donning, log roll maneuvers, and sitting up, using electromagnetic sensors in lightly embalmed cadavers. Noninvasive halo donning generates significantly less C1–C2 motion than donning of the CH. The CH immobilizes C5–C6 instability significantly greater during log-roll and both devices perform similarly for C5–C6 and C1–C2 instability for the sit-up maneuver.
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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) | 0,001 | 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 ».