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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
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.

Type
Original Article
Copyright
2003 European Society of Anaesthesiology

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