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. 2015 Jun 15;32(12):865–874. doi: 10.1089/neu.2014.3668

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© Isaac Phang, Melissa C. Werndle, Samira Saadoun, Georgios Varsos, Marek Czosnyka, Argyro Zoumprouli, Marios C. Papadopoulos 2015; Published by Mary Ann Liebert, Inc.

This Open Access article is distributed under the terms of the Creative Commons Attribution Noncommercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited.

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FIG. 4. — Vascular pressure reactivity index (sPRx). (A) Representative intraspinal pressure (ISP), spinal cord perfusion pressure (SCPP), and sPRx. (a) ISP constant high, SCPP rises, sPRx falls; (b) ISP constant high; SCPP constant low; sPRx constant high; (c) ISP low; SCPP high; sPRx low (for explanation, see text). (B) sPRx after laminectomy+duroplasty and after laminectomy. The SCPP that produces the best spinal cord pressure reactivity (SCPPopt) corresponds to minimum sPRx. Points are patients, lines are means. (C) Mean sPRx vs. SCPP after laminectomy and after laminectomy+duroplasty. (D) sPRx vs. SCPP for two patients (Patient 1 SCPPopt=70 mm Hg; Patient 2 SCPPopt=100 mm Hg). (E) SCPPopt of individual laminectomy (open circles) and laminectomy+duroplasty (closed circles) patients. Laminectomy (open circles, n=11); laminectomy+duroplasty (closed circles, n=7). LAMI, laminectomy; LAMI+DURO, laminectomy+duroplasty. p<0.01**.