Case lab: three WHO cases, with answers

Three cases. Pause, then check.

Three cases. Pause on each, decide your answer, then check it. Each comes from WHO's own guide.

Kidney disease, and hypertension

Case one. Chronic kidney disease stage four, secondary to hypertensive renal disease. Essential hypertension is also recorded. What is the main condition, and what do you cluster? Pause.

• Record · CKD stage 4 · Chronic kidney disease, stage 4, secondary to hypertensive renal disease. Essential hypertension also recorded.
• Your task · Pause · Which is the main condition, and what is clustered?

One cluster, one other

The answer. The main condition is a cluster: chronic kidney disease stage four, linked to hypertensive renal disease. Essential hypertension is another condition, coded separately.

• GB61.4 · Main condition · CKD, stage 4
• BA02 · Linked to · / · Hypertensive renal disease

A drug reaction

Case two. Diplopia due to a reaction to an antihistamine taken as prescribed. Think harm, cause and mode. Pause.

• Record · Diplopia · Diplopia due to a reaction to an antihistamine taken as prescribed.
• Your task · Pause · Harm, cause and mode: which codes?

Harm, cause, mode

The answer. Harm: diplopia. Cause: drugs associated with injury or harm in therapeutic use, with an optional extension identifying an antihistamine. Mode: drug-related harm in the context of correct administration. One cluster.

• 9D46 · Harm · Diplopia
• PL00 · Cause · / · Drug harm in therapeutic use
• XM4J58 · Drug extension · & · Antihistamine
• PL13.2 · Mode · / · Correct administration or dosage

Check yourself

Pause and think. In that case, how is essential hypertension handled? The answer: As another condition, coded separately. Essential hypertension is another condition, coded separately.

• As another condition, coded separately
• Added into the same cluster
• Left out of the record
• Made the main condition

Keep these in mind

Link only what the record links. Harm, cause and mode make one cluster. And check your answer against a WHO example.

• Link only what the record links
• Harm, cause and mode make one cluster
• Check your answer against a WHO example