Positive end expiratory pressure reduces intracranial compliance in the rabbit

Zeev Feldman, Claudia S. Robertson, Charles F. Contant, Shankar P. Gopinath, Robert G. Grossman

Research output: Contribution to journalArticle

24 Scopus citations

Abstract

Acute respiratory distress syndrome is commonly encountered in head- injured patients. Positive and expiratory pressure (PEEP) is useful in improving oxygenation. However, PEEP, by increasing intrathoracic pressure, decreases venous return, mean arterial pressure, and cardiac output and increases jugular vein pressure. There is conflicting evidence in the literature as to the potential effect of PEEP on intracranial pressure (ICP). The present study was undertaken to examine the effect of PEEP on ICP and intracranial compliance. Twelve male rabbits weighing 3.5-4.5 kg were used. The following parameters were monitored: arterial blood pressure, ICP (intraparenchymal Camino device), PaCO2, and PaO2. A space-occupying lesion was produced by inflation of a double lumen pediatric Swan-Ganz catheter placed over the right parietal dura. The amount of fluid required to reach the point of exponential increase of ICP was recorded at PEEP of 0 and 10 cm H2O. The mean volume needed to reach the deflection point of ICP was significantly lower when PEEP was 10 cm H2O compared to the value when PEEP was 0 cm H2O (685 ± 48 vs. 883.3 2+ 46 μl, respectively; p < 0.01). The results of the present study indicated that PEEP of 10 cm H2O decreases intracranial compensatory reserves for maintaining ICP at normal levels in the presence of an expanding intracranial mass.

Original languageEnglish (US)
Pages (from-to)175-179
Number of pages5
JournalJournal of Neurosurgical Anesthesiology
Volume9
Issue number2
DOIs
StatePublished - Jan 1 1997

Keywords

  • Head injury
  • Intracranial compliance
  • Intracranial pressure
  • Positive end expiratory pressure (PEEP)
  • Rabbit

ASJC Scopus subject areas

  • Anesthesiology and Pain Medicine
  • Clinical Neurology

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