📚 Deeper Dive · Scenario 35 of 57

The Sugar That Climbed, In Depth

High blood sugar & DKA red flags — the why behind manage-and-escalate
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When the sugar climbs — and when it becomes an emergency

Mr. Ruiz has been very thirsty, urinating often, and now feels tired with blurry vision, and his blood sugar reads high. That's hyperglycemia. It develops when there isn't enough insulin action for the body's needs — from illness, missed medication, or too much intake — and left unchecked it can progress to a dangerous emergency.

Think of sugar piling up in the bloodstream like sand in a filter. The kidneys try to flush the excess out in the urine, and that flushing drags water with it — which is why the patient urinates a lot, gets thirsty, and feels drained. Drink plain water and it helps; drink sugary drinks and you pour more sand in.

The everyday signs

Increased thirst, frequent urination, fatigue, blurry vision, and headache. These tell you the sugar is high and needs monitoring and management — confirm the reading, assess the patient, and follow orders.

High vs. low — opposite pictures, opposite fixes. Low sugar is shaky, sweaty, and confused and needs sugar. High sugar is thirsty, urinating, and tired and needs the diabetes managed per orders. Confusing them is dangerous, so always confirm with a reading.

The DKA red flags

The reason high sugar is more than a nuisance: it can tip into diabetic ketoacidosis (DKA), a medical emergency. The red flags are fruity-smelling breath, deep and rapid breathing, nausea and vomiting, abdominal pain, and confusion or drowsiness. Any of these means escalate urgently.

A normal glucose does NOT rule out DKA. Patients taking an SGLT2 inhibitor (a "-flozin" diabetes medicine) can be in DKA with a near-normal fingerstick glucose — this is called euglycemic DKA. And an infection can precipitate DKA without causing a fever. Trust the symptoms, not just the number on the meter or a normal temperature.

The nurse's job

Confirm and monitor the sugar, follow orders (including insulin, which is always given per order and protocol), encourage sugar-free fluids if appropriate, teach and support the patient — and act fast the moment DKA red flags appear.