Establishment of a monitoring model of stellate ganglion discharge in rats / 中华麻醉学杂志

ABSTRACT

Objective To establish a monitoring model of stellate ganglion discharge in rats.Methods Thirty healthy Sprague-Dawley rats of either sex,aged 6-7 weeks,weighing 230-270 g,were selected.The left stellate ganglion was isolated after anesthesia and hung on the platinum electrode head to observe its electrical signal.Heart rate was recorded immediately after successful anesthesia (T0),immediately after the stellate ganglion was suspended in the electrode head (Tt),at 10,20 and 30 min after the stellate ganglion was suspended in the electrode head (T2-4),the frequency and amplitude of discharge of the stellate ganglion was recorded at T1-4.After recording the nerve electrical signal at T4,the stellate ganglion was locally infiltrated with 0.2％ lidocaine 0.2 ml and then the frequency and amplitude of discharge was recorded 5 min later (Ts).The occurrence of Horner's syndrome was considered as a sign of successful block,and the success of block was recorded.Results There was no significant difference in heart rate at each time point (P＞0.05).Paroxysmal clustered and rhythmically regular neuroelectrical activity of stellate ganglion was found at T1-4,and there was no significant difference in the frequency and amplitude of discharge at each time point (P＞0.05).The frequency and amplitude of discharge of stellate ganglion were significantly decreased at T5 than at T1-4 (P＜0.01).Conclusion The discharge monitoring model of stellate ganglion is successfully established in rats.