The principle of “less is more” applies here. Focusing on the most relevant clinical factors and ordering tests as needed can often be more effective than expanding routine panels and thus avoiding ‘test fatigue’
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Imbalances are insidious and the benefit to knowing a level is low can be the difference between preventing torsades or getting somebody off the vent
But there are plenty of asymptomatic patients with a K of 6.8, a phos of 0.7 or a Mg of 0.5 until they’re not.
If anything going out of my way to order what I consider routine lytes is more fatiguing.