title: [Effects of low reactive level laser, linear polarized light and Xenon-ray irradiation on the stellate ganglion in dogs].
abstract: The aim of this study was to clarify the influence of low reactive level laser, linear polarized light and Xenon-ray irradiation on stellate ganglion activity in dogs. Under general anesthesia, the right stellate ganglion was exposed by thoracotomy. After stabilization of the hemodynamic parameters, the following baseline measurements were taken: mean arterial pressure (MAP), heart rate (HR), and right brachial artery blood flow (BABF). Experiment 1: The stellate ganglion was directly irradiated for 10 min with low reactive level laser, linear polarized light or Xenon-ray. The hemodynamic parameters were measured for 60 min after each irradiation. Immediately after the irradiation study, stellate ganglion blockade (SGB) with 0.5% mepivacaine 1.0 ml was performed. Experiment 2: After confirming a decrease in BABF by direct electrical stimulation on the stellate ganglion, the stellate ganglion was directly irradiated with low reactive level laser, linear polarized light or Xenon-ray. The hemodynamic parameters were measured for 60 min after each irradiation. Immediately after the irradiation study with 0.5% mepivacaine 1.0 ml was performed. The hemodynamic parameters were also measured for 60 min after SGB. The changes in variables were not statistically significant after each irradiation in the experiment 1 and 2. After SGB, a significant decrease in HR and a significant increase in BABF occurred in the experiment 1 and 2. In conclusion, this study demonstrated that irradiation with low reactive level laser, linear polarized light and Xenon-ray of the stellate ganglion did not induce sympathetic blockade in dogs.
authors.affiliation: First Department of Anesthesiology, Dokkyo University School of Medicine, Tochigi 321-0293.
authors.forename: M
authors.initials: M
authors.lastname: Nagao
authors.forename: S
authors.initials: S
authors.lastname: Yamaguchi
authors.forename: Y
authors.initials: Y
authors.lastname: Okuda
mesh_terms: D000818:Animals; D001794:Blood Pressure / Q000502:physiology; D004285:Dogs; D006339:Heart Rate / Q000502:physiology; D007834:Lasers; D008027:Light; D013233:Stellate Ganglion / Q000528:radiation effects*; D014978:Xenon
chemical_list: D014978:Xenon