A prospective randomized study of cerebrospinal fluid drainage to prevent paraplegia after high-risk surgery on the thoracoabdominal aorta E.Stanley Crawford, MD, Lars G. Svensson, MB, PhD, Kenneth R. Hess, MS, Salwa S. Shenaq, MD, Joseph S. Coselli, MD, Hazim J. Safi, MD, Prita K. Mohindra, MD, Victor Rivera, MD Journal of Vascular Surgery Volume 13, Issue 1, Pages 36-46 (January 1991) DOI: 10.1016/0741-5214(91)90010-R Copyright © 1991 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions
Fig. 1 Drawings illustrate the classification of thoracoabdominal aortic aneurysms used in this study. Journal of Vascular Surgery 1991 13, 36-46DOI: (10.1016/0741-5214(91)90010-R) Copyright © 1991 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions
Fig. 2 Nomogram for calculating minimal sample size for a statistically valid study with a dichotomous endpoint (alpha = 0.05, beta = 0.2, power = 80%, based on Pearson chi-square test). Journal of Vascular Surgery 1991 13, 36-46DOI: (10.1016/0741-5214(91)90010-R) Copyright © 1991 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions
Fig. 3 Histogram of total CSF volume drained in 47 patients. Journal of Vascular Surgery 1991 13, 36-46DOI: (10.1016/0741-5214(91)90010-R) Copyright © 1991 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions