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  • Title: Hemodynamic effects of spinal anesthesia in the elderly: single dose versus titration through a catheter.
    Author: Favarel-Garrigues JF, Sztark F, Petitjean ME, Thicoïpé M, Lassié P, Dabadie P.
    Journal: Anesth Analg; 1996 Feb; 82(2):312-6. PubMed ID: 8561333.
    Abstract:
    Sixty elderly patients (> 70 yr old) undergoing surgery for hip fracture were prospectively studied in order to compare hemodynamic tolerance of titrated doses of hyperbaric bupivacaine using continuous spinal anesthesia (CSA) versus single-dose spinal anesthesia (SDSA). Patients were randomized into two groups (CSA group: n = 30; SDSA group: n = 30). The SDSA patients received 10-15 mg of 0.5% hyperbaric bupivacaine (based on age and height), and the CSA patients received a starting dose of 5 mg of 0.5% hyperbaric bupivacaine, followed after 15 min by optional reinjection of 2.5 mg every 5 min until a T10 level sensory block was reached. Onset of anesthesia, noninvasive hemodynamic variables and the need for ephedrine were studied for 4 h after induction of anesthesia. Spinal anesthesia was successful in all patients. Decreases in mean arterial pressure were significantly less frequent and less pronounced in the CSA group (19.9% +/- 1.6% of the baseline value) than in the SDSA group (40.2% +/- 1.9%, P < 0.0001). The mean dose of ephedrine was significantly less in the CSA group (1.8 +/- 0.7 mg, administered to only 37% of patients) than in the SDSA group (19.4 +/- 3.3 mg administered to all patients, P < 0.0001). No late complications related to the spinal anesthesia technique were observed in either group. We concluded that CSA, using small titrated doses of 0.5% hyperbaric bupivacaine, is safe, efficient, and provides better hemodynamic stability than SDSA in elderly patients.
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