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Korean Journal of Anesthesiology 2001;40(4):483-488.
DOI: https://doi.org/10.4097/kjae.2001.40.4.483   
The Change of Cervical Epidural Pressure according to Infused Normal Saline in Epiduroscopy.
Wan Soo Oh, Min Je Son, Hee Wook Wie, Kwang Min Kim
Pain Management Center, Department of Anesthesiology, College of Medicine, Hallym University, Seoul, Korea.
Normal saline is used to dilate the epidural space to provide a focal length for the lens and to wash the epidural adhesive neural tissue in an epiduroscopy. Saline infusion into the epidural space during an epiduroscopy might affect pressure-volume compliance of the CSF which has a high compliance; therefore, it might cause neurological sequelaes. The purpose of this study was to investigate the change of cervical epidural pressure according to the volume of infused saline during epiduroscopy.
Twenty-one patients who complained of low back pain with radiculopathy that did not respond to conservative pain management and underwent an epiduroscopy were included in this study. The epidural catheter was placed between the 5th and 6th cervical epidural space under fluoroscopic guidance and cervical epidural pressure was monitored. Next, an epiduroscopy via caudal route was performed and cervical epidural pressure was measured after each 10 ml of infused saline. We also checked neurological sequelaes that might be resulted from increased epidural pressure.
All patients except two showed no difference in basal cervical epidural pressure. One patient who had failed back surgery syndrome complained of a headache and dizziness when the cervical epidural pressure was rapidly increased from 90 mmHg to 5 mmHg following an infusion of 27 ml of saline. One patient who had a herniated disc showed posterior nuchal pain and stiffness following an infusion of 48 ml of saline despite a stable cervical epidural pressure (range: 0 - 3 mmHg) during the procedure. There were no residual neurological sequelaes in this study.
There are variable patterns in cervical epidural pressure according to the volume of infused saline. Close monitoring of intracranial pressure is therefore neccessary during an epiduroscopy.
Key Words: Equipment: epiduroscopy; Monitoring: cervical epidural pressure
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