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Randomized comparison between sevoflurane anaesthesia and unilateral spinal anaesthesia in elderly patients undergoing orthopaedic surgery

Published online by Cambridge University Press:  12 July 2005

A. Casati ,
G. Aldegheri ,
F. Vinciguerra ,
A. Marsan ,
G. Fraschini  and
G. Torri
A. Casati
Affiliation:
Vita-Salute University, Department of Anaesthesiology, IRCCS H. San Raffaele, Milan, Italy
G. Aldegheri
Affiliation:
Vita-Salute University, Department of Anaesthesiology, IRCCS H. San Raffaele, Milan, Italy
F. Vinciguerra
Affiliation:
Vita-Salute University, Department of Anaesthesiology, IRCCS H. San Raffaele, Milan, Italy
A. Marsan
Affiliation:
Vita-Salute University, Department of Anaesthesiology, IRCCS H. San Raffaele, Milan, Italy
G. Fraschini
Affiliation:
Vita-Salute University, Orthopaedic Surgery, IRCCS H. San Raffaele, Milan, Italy
G. Torri
Affiliation:
Vita-Salute University, Department of Anaesthesiology, IRCCS H. San Raffaele, Milan, Italy
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Abstract

Summary

Background and objective: This prospective, randomized study was conducted to compare unilateral spinal block using small doses of hyperbaric bupivacaine and single-agent anaesthesia with sevoflurane in elderly patients undergoing hip surgery.

Methods: Thirty patients (>65 yr) undergoing hip fracture repair were randomly allocated to receive unilateral spinal anaesthesia with hyperbaric bupivacaine 7.5 mg 0.5% (Group Spinal, n = 15) or volatile induction and maintenance anaesthesia with sevoflurane (Group SEVO, n = 15). General anaesthesia was induced by increasing the inspired concentration to 5%. A laryngeal mask airway was placed without muscle relaxants, and the end-tidal concentrations of sevoflurane were adjusted to maintain cardiovascular stability. Hypotension (decrease in systolic arterial pressure >20% from baseline), hypertension or bradycardia (heart rate < 50 beats min−1) requiring treatment, and the length of stay in the postanaesthesia care unit was recorded. Cognitive functions were evaluated the previous day, and 1 and 7 days after surgery with the Mini Mental State Examination test.

Results: Hypotension occurred in seven patients of Group Spinal (46%) and in 12 patients of Group SEVO (80%) (P = 0.05). Phenylephrine was required to control hypotension in three spinal patients (21%) and four SEVO patients (26%) (n.s.). SEVO patients had lower heart rates than spinal patients from 15 to 60 min after anaesthesia induction (P = 0.01). Bradycardia was observed in three SEVO patients (22%). Discharge from the postanaesthesia care unit required 15 (range 5–30) min in Group Spinal and 55 (15–80) min in Group SEVO (P = 0.0005). Eight patients in Group Spinal (53%) and nine patients in Group SEVO (60%) showed cognitive decline (Mini Mental State Examination test decreased ≥ 2 points from baseline) 24 h after surgery (n.s.). Seven days after surgery, confusion was still present in one patient of Group Spinal (6%) and in three patients of Group SEVO (20%) (n.s.).

Conclusions: In elderly patients undergoing hemiarthroplasty of the hip, induction and maintenance with sevoflurane provide a rapid emergence from anaesthesia without more depression of postoperative cognitive function compared with unilateral spinal anaesthesia. This technique represents an attractive option when patient refusal, lack of adequate co-operation or concomitant anticoagulant therapy contraindicate the use of spinal anaesthesia.

Keywords

ADULT, agedANAESTHESIA, CONDUCTION, anaesthesia spinalANAESTHETICS INHALATION, sevofluraneANAESTHETICS, LOCAL, bupivacaineMENTAL PROCESSES, cognition
Type
Original Article
Information
European Journal of Anaesthesiology , Volume 20 , Issue 8 , September 2003 , pp. 640 - 646
Copyright
2003 European Society of Anaesthesiology

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