Summary
Cardiac output determinations were carried out on 44 unselected patients before, during, and after spinal surgery. Substantial changes were recorded in the course of each operation but there were no significant differences between two treatment groups receiving either halothane or neuroleptanaesthesia (Innovar®).
In 17 of the same patients CO2 output and O2 uptake studies were also carried out. These indicate that while CO2 output remains close to the resting normal, O2 uptake from the superior vena cava bed is significantly more reduced with halothane than with nla. It follows that in other areas of the organism the reverse must hold true.
On discharge from the recovery room, the mean cardiac index was 4.3 ± 0.25 L/m2/min. This value underlines the need for cardiac reserve or for the support of vital functions in the immediate postanaesthetic period.
Résumé
On a étudié le débit cardiaque chez 44 malades pris au hazard avant, pendant et après la chirurgie rachidienne. Au cours de chaque opération, on a noté des variations substantielles, mais il n’y a pas eu de différence importante entre les deux groupes observés: ceux qui ont reçu du fluothane ou une neuroleptanesthésie (Innovar).
On a aussi fait des etudes sur ľélimination de CO2 et ľabsorption ďO2 chez 17 de ces malades. Ces études indiquent que, alors que ľélimination de CO2 demeure près de la normale ďun sujet au repos, ľabsorption ďO2 du lit de la veine cave supérieure est sensiblement plus diminuée avec ľhalothane qu’avec la neuroleptanesthésie. Il s’ensuit qu’ailleurs dans ľorganisme le contraire doit être vrai. Au départ de la salle de réveil, ľindex cardiaque moyen était de 4.3 ± 0.25 L/ m2/ min. Ceci souligne le besoin de réserve cardiaque ou de support des foncions vitales durant la période postanesthésique immédiate.
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From the Departments of Anaesthesia and Neurosurgery, Notre-Dame Hospital, Montreal. Presented in part to a panel on anaesthesia in neurosurgery during the Fourth World Congress of Anaesthesiologists, London, September 1968.
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KeÉri-SzÁntÓ, M. A comparison of halothane and neuroleptanaesthesia for disc surgery: haemodynamic and metabolic studies. Can. Anaes. Soc. J. 16, 235–240 (1969). https://doi.org/10.1007/BF03004444
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DOI: https://doi.org/10.1007/BF03004444