The Use of Tissue Oxygen Monitoring in Critically Injured Patients

Status Terminated

Clinical Trial Summary

It is anticipated that the use of tissue oxygen monitoring to measure brain tissue oxygen and deltoid muscle oxygen will provide more precise information about focal brain ischemia and systemic hypoperfusion than current techniques and measures such as blood pressure, heart rate and intracranial pressure. Understanding the relationship between tissue oxygen tension collected from the brain and deltoid muscle in critically injured patients could lead to a broader understanding of the important metabolic and cellular events that occur following severe injury and the changes induced by therapeutic interventions. Furthermore, the use of interventions designed to improve tissue hypoxia, as measured by low brain or muscle tissue oxygen, may improve mortality or neurological recovery after systemic trauma or head trauma compared to current approaches that do not involve tissue metabolic monitoring.

Clinical Trial Description

This is a prospective, observational, cohort study designed to investigate metabolic changes in the brain and deltoid muscle of injured patients. Study objectives are as follows:

- To establish critical, abnormal levels of tissue oxygen in the brain (PbrO2) and muscle (PmO2) of injured patients.

- To correlate PbrO2 with other currently available diagnostic measures used in head-injured patients, including ICP, mean arterial blood pressure (MAP), CPP, SjO2, CT findings, neurological examinations, and clinical outcomes from traumatic brain injury.

- To correlate PmO2 with base deficit measurements, standard physiologic variables, near infra-red oxygen levels, infectious complications, and outcomes in critically injured patients.

Investigators will enroll patients with multisystem trauma including brain injury. In addition to the results obtained from oxygen monitoring, other data collected prospectively will include:

1. Baseline Characteristics- mechanism of injury, arrival blood pressure and GCS, results of imaging procedures, age, gender, blood gas analysis, injuries and injury severity, and all operative procedures,

2. ICU Care - MAP, ICP, CPP, base deficit, oxygen saturation, CVP, cardiac output, GCS scores, short-term outcome data, infectious complications and organ dysfunction.

All physiological data will be downloaded automatically and continuously from the bedside monitor, ventilator, and oxygen monitors via a study-dedicated computer and customized software (Aristein Bioinformatics, Palo Alto, CA). ;

Study Design

Observational Model: Cohort, Time Perspective: Prospective

Related Conditions & MeSH terms

Clinical Trial Details

NCT number	NCT00328341
Study type	Observational
Source	University of California, San Francisco
Contact
Status	Terminated
Phase	N/A
Start date	April 2006
Completion date	December 2011

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