The clinical research on the different proportions of unilateral spinal anesthesia in the elderly patients with hip surgery

Objective To study the anesthesia effect and its complications of the different proportions of unilateral spinal anesthesia in the elderly patients with hip operation. Methods Sixty elderly patients with hip operation were randomly divided into two groups,both of which were implemented by combined spinal epidural anesthesia. The hypobaric group( group A,n = 30) was used 0. 75% bupivacaine mixed with sterile water for injection. The hyperbaric( group B,n = 30) was used 0. 75% bupivacaine mixed with 5% glucose for injection. The two groups were adopted mixed liquor contained bupivacaine ranging from 8 to 15 mg and the speed of injection was 0. 1 ml / s. In order to maintain the anesthesia plane,all the patients kept the same puncture position for a moments as before. The onset time of anesthesia,completely block time of anesthesia,time of duration,hemodynamic changes and the incidence of adverse reactions were observed in this study. Results All the patients satisfied with the anesthesia effect in the two groups. The onset time of anesthesia and the plane of the fixed time in group A were longer than those in group B.The time of duration in group A was shorter than that in group B. A severe hemodynamic fluctuation was found in group B,which needed to add vasoactive drugs. Conclusion Both of the proportions of specific gravity of unilateral spinal anesthesia is safe on hip operation for the elderly patients,but the hemodynamic of the light specific gravity of the unilateral spinal anesthesia is more stable and feasible.