Which of the following is NOT considered a criterion for an unstable patient?

Unmanaged hypertension is not independently considered a criterion for an unstable patient in the context presented. While hypertension can contribute to a patient's overall health and stability, it is often viewed more as a chronic condition that requires management rather than an indicator of immediate instability.

In contrast, marked deterioration of health status reflects acute changes that negatively impact a patient’s well-being and can indicate instability. Similarly, psychosocial changes or poor nutritional status are generally viewed as factors that can compromise a patient's stability, particularly in renal populations where nutrition plays a critical role. Inadequate dialysis also directly relates to the risk of instability, as it can lead to the accumulation of toxins and fluid overload, causing acute health decline.

Therefore, while unmanaged hypertension should certainly be addressed, it doesn't directly signal instability in the same immediate and pressing way that the other options do.