Brain Tissue Oxygen Monitoring and Care

Brain Tissue Oxygen Monitoring and Care

Brain tissue oxygen (PbtO2) monitoring is used to measure oxygen delivery to the cerebral tissue and to identify cerebral ischemia and hypoxia in patients with traumatic brain injury, stroke, or aneurysm or traumatic subarachnoid hemorrhage. It’s also used to monitor other patients at risk for secondary
brain injury. Secondary brain injury typically results when complications, such as elevated intracranial pressure (ICP), shivering, agitation, seizures, fever, hypotension, hypovolemia, anemia, and hypoxia, cause cerebral hypoxia. Cerebral hypoxia, in turn, can lead to cerebral ischemia.

PbtO2 monitoring is achieved using a PbtO2 probe that’s inserted through an intracranial bolt or tunneled under the scalp using a probe guide and trocar. When used with an intracranial bolt, the system measures ICP, brain tissue temperature, and PbtO2 saturation. It can detect early changes in ICP and PbtO2 so that treatment interventions can be performed before secondary brain injury occurs. Contraindications of PbtO2 monitoring include anticoagulation therapy, insertion site infection, and coagulopathy.

The normal value for PbtO2 ranges between 20 and 35 mm Hg. Decreased levels occur when there’s an increased oxygen demand or a decrease in oxygen delivery. Increased levels occur when there’s increased oxygen delivery or decreased oxygen demand.

Jul 21, 2016 | Posted by in NURSING | Comments Off on Brain Tissue Oxygen Monitoring and Care

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