What is the threshold critical value for high plasma sodium?

The threshold critical value for high plasma sodium, commonly referred to as hypernatremia, is typically recognized as being significant when levels reach 160 mmol/L or higher. This value indicates a potential clinical concern, as it may lead to severe physiological changes and complications, such as dehydration of brain cells, resulting in neurological symptoms.

Understanding the reason for this threshold is essential in clinical practice, as levels above this mark require careful monitoring and intervention to prevent further complications. These critical values are established based on clinical studies and consensus guidelines, which help clinicians decide when to take action regarding treatment or further diagnostics. The choice of 160 mmol/L represents a recognized boundary where the risks associated with elevated sodium levels increase substantially, warranting a proactive approach from healthcare providers.