Haemodynamic response to induction of anaesthesia with ketamine/midazolam
- 1 October 1991
- journal article
- clinical trial
- Published by Springer Nature in Canadian Journal of Anesthesia/Journal canadien d'anesthésie
- Vol. 38 (7) , 844-848
- https://doi.org/10.1007/bf03036958
Abstract
The haemodynamic responses following induction of anaesthesia with ketamine and midazolam have not been determined previously. Twenty adult patients for elective myocardial revascularization were randomized to two regimens for induction of anaesthesia. Patients in Group I received ketamine, 2 mg·kg−1, and midazolam, 0.2 mg·kg−1 and those in Group II received ketamine, 2 mg·kg−1, and midazolam, 0.4 mg·kg−1. Measurements were recorded at baseline, 1 min postinduction, and at one, three, five and ten minutes after tracheal intubation. Tachycardia and hypertension (>20% increases from awake baseline values) were treated with esmolol, 250 μg·kg−1. There were 11 patients in Group I and nine patients in Group II. There were no significant intergroup differences in demographic or haemodynamic variables. Both groups had decreases (P−1. Il y avait Il patients dans le groupe I et neuf patients dans le groupe II. Il n’y avait aucune différence significative entre les groupes dans les données démographiques et les variables hémodynamiques. Les deux groupes avaient une diminution significative (P<0,05) dans le volume d’éjection, la pression capillaire pulmonaire bloquée, le volume en fin de diastole du ventricule droit aux différents intervalles de l’étude après induction de l’anesthésie. Aucun de ces changements n’a requis une intervention clinique. Cinq patients (tous du groupe II) ont présenté une hypertension lors de l’intubation. L’hypertension préopératoire (pression artérielle moyenne ≥ 100 mmHg) pouvant prédire (P<0,05) la réponse hypertensive lors de l’intubation et indépendamment de la dose de midazolam. L’administration intraveineuse de kétamine et de midazolam fut associée à une inducence élevée (25%) de réponse hémodynamique lors de l’intubation. La dose élevée de midazolam n’a pas fourni d’avantage hémodynamique.Keywords
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