Br J Neurosurg. 1998 Jun;12(3):223-7.

A clinical evaluation of the Codman MicroSensor for intracranial pressure monitoring.

Signorini DF, Shad A, Piper IR, Statham PF.

Source

Department of Clinical Neurosciences, University of Edinburgh, UK. dfs@skull.dcn.ed.ac.uk

Abstract

The strain-gauge Codman MicroSensor intracranial pressure (ICP) transducer has shown consistently good laboratory performance. To assess the practical performance of the system in patients following acute brain injury, 10 patients were fitted with a MicroSensor and a second ICP monitor. In five cases this was a fibre-optic transducer and in five cases an intraventricular fluid-filled device. Paired ICP values were recorded every 5 min. ICP values ranged from 0 to 31 mmHg. Altman-Bland plots showed that individual readings could differ by as much as 9 mmHg. Further analysis showed that much of this disagreement could be explained by a constant offset on each occasion. Comparison traces of ICP in individual patients show high agreement in timing and size of changes. The unexplained constant offset leads to uncertainty about the true ICP. Treatment decisions are often based upon absolute levels of ICP and patient care may therefore differ depending upon the monitor used.

PMID:: 11013684; [PubMed - indexed for MEDLINE]

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