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INFLUENCE OF A SUPRATENTORIAL EXPANDING MASS ON INTRACRANIAL PRESSURE‐VOLUME RELATIONSHIPS
Author(s) -
Löfgren Jan,
Zwetnow Nicolaus N.
Publication year - 1973
Publication title -
acta neurologica scandinavica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.967
H-Index - 95
eISSN - 1600-0404
pISSN - 0001-6314
DOI - 10.1111/j.1600-0404.1973.tb01333.x
Subject(s) - elastance , intracranial pressure , cisterna magna , cardiology , medicine , anesthesia , mass effect , cerebrospinal fluid , surgery , computed tomography , lung
The effect of an expanding mass on the elastance dP/dV (mmHg/ml) of the intracranial system was investigated using dogs, and correlated to the mechanical developments. The volume of a supratentorial rubber balloon was increased as a step function of time, and the transient and steady state responses of the intraventricular and cisterna magna pressures recorded. The ultimate efficiency of the spatial compensation was about 70 %. The elastance increased initially due to the rise in intracranial pressure. When transtentorial herniation developed, the elastance was subjected to a further increase of approximately 30 %, an effect attributed to the obstruction of the spinal compartment. When the intracranial pressure approached the arterial pressure the elastance decreased. A pronounced dependency of the elastance on the arterial blood pressure was demonstrated.