Baseline rSO2 Provides Patient-Unique Insights
We all know that baseline vital sign measurements help establish the health or pathology of a patient. Similarly, baseline cerebral oxygenation may be associated with a surgery patient's cerebrovascular health.1,2
Just as with prothrombin times, hematocrit and hemoglobin, obtaining baseline rSO2 information helps you ensure that your patient's unique physiology and co-morbidities are taken into account so you can provide the best possible customized care.
For example, due to the pre-existing morbidities of most surgical patients, baseline rSO2 can be naturally high or low; thus, managing the patient to established norms may not be appropriate. In addition, studies have shown an association between baseline rSO2 and cardiac function1 and recovery from surgery2.
Some cerebral oximetry devices promote "spot checking." This eliminates the most important benefit of continuous NIRS monitoring - early identification of a patient's falling oxygen saturation levels.
The INVOS ® System lets you capture patient unique physiology so each patient serves as his/her own control, giving you a higher level of control to customize patient care.  In a pre-op holding area or in the OR prior to intubation/induction:
- Apply a left and right cerebral sensor
- Apply two additional somatic sensors if desired
- Set the patient's baseline rSO2 with the press of a button
This establishes a baseline to which subsequent rSO2 changes over the duration of the operation will be automatically compared. Knowledge of baseline rSO2 values can affect operative strategies and provide information for optimum reaction and intervention during periods of hemodynamic instability.1,2
Footnotes:
1. Paquet C et al. J Cardiothorac Vasc Anesth 2008; Dec;22(6):840-6.
2. Yao FSF et al. Anesth Analg 2000;90:SCA30.
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