PMID: 3750086Jun 1, 1986Paper

Valsalva maneuver biomechanics. Effects on lumbar trunk loads of elevated intraabdominal pressures

Spine
A NachemsonA B Schultz

Abstract

The ability of a partial or full Valsalva maneuver (voluntary pressurization of the intraabdominal cavity) to unload the spine was investigated in four subjects. During the performance of five isometric tasks, intraabdominal and intradiscal pressures and surface myoelectric activities in three lumbar trunk muscle groups were measured. The tasks were carried out without voluntary pressurization of the intraabdominal cavity and then when the subjects performed partial and full Valsalva maneuvers. A biomechanical model analysis of each task was made to help interpret the experimental measurements. Intraabdominal pressure was found not to be an indicator of spine load in these experiments. The Valsalva maneuvers did raise intraabdominal pressure, but in four of the five tasks increased rather than decreased lumbar spine compressions occurred.

Citations

Dec 8, 2005·European Spine Journal : Official Publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society·N Arjmand, A Shirazi-Adl
Nov 15, 2003·Journal of Biomechanics·Jaap H van DieënJ C E van der Bug
Oct 9, 1998·Occupational and Environmental Medicine·A J van der Beek, M H Frings-Dresen
Feb 3, 2015·Journal of Biomechanics·Marcel DreischarfAntonius Rohlmann

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