Serial determinations of cerebral water content by magnetic resonance imaging after an infusion of hypertonic saline

Critical Care Medicine
A BacherM H Zornow

Abstract

To determine regional cerebral water content in vivo by magnetic resonance imaging (MRI) after the administration of 7.5% saline in brain-lesioned rabbits. Randomized, controlled, intervention trial. University animal laboratory. Eighteen male New Zealand white rabbits, randomly assigned to one of three groups. The animals were anesthetized (1% halothane), intubated, and mechanically ventilated to maintain end-tidal CO2 tension between 30 and 35 mm Hg (4 and 4.7 kPa). Arterial and central venous catheters were inserted and arterial blood samples were serially obtained during the experiment. Serum osmolality was measured. A cryogenic cerebral lesion was produced by pouring liquid nitrogen for 1 min into a funnel placed on the intact skull over the right hemisphere. One group of animals received 20 mL of 7.5% saline intravenously 150 mins after the cerebral lesion was generated (7.5% saline group, n = 7). A second group of animals received the same volume of 0.9% saline intravenously (0.9% saline group, n = 7). In a third group of animals (control group, n = 4) no lesion was created and no fluid administered. Five spin-echo T2-weighted MRIs of the brain were acquired at 90 mins (Baseline 1), 120 mins (Baseline 2), 150 mins (Infus...Continue Reading

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Citations

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Jul 5, 2017·Frontiers in Neurology·Carl-Henrik NordströmMagnus Olivecrona
May 29, 2021·Clinical Neurology and Neurosurgery·Aaron Desai, Rahul Damani

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