Hypertensive disorders mnemonic

Signs of magnesium sulphate toxicity

The mnemonic

Reflex, Respire, Rhythm

What each word stands for

  • ReflexPatellar reflex lost first
  • RespireRespiratory depression next
  • RhythmCardiac arrest last

Why it matters clinically

Checking reflexes and respiratory rate before each dose prevents toxicity.

Where it stops being reliable

Gives order of toxicity only. Urine output below 30 mL per hour also needs attention, and the antidote is calcium gluconate.

Teaching aid, still awaiting independent review. Confirm facts in a standard source.

More mnemonics

Common questions

What is the Hypertensive disorders mnemonic?

Reflex, Respire, Rhythm. It helps you recall: Signs of magnesium sulphate toxicity.

What does "Reflex" stand for?

Patellar reflex lost first

What does "Respire" stand for?

Respiratory depression next

What does "Rhythm" stand for?

Cardiac arrest last

What are all the parts of the Reflex, Respire, Rhythm mnemonic?

Reflex: Patellar reflex lost first; Respire: Respiratory depression next; Rhythm: Cardiac arrest last.

Which topic does this mnemonic belong to?

It belongs to Hypertensive disorders in OBG.

Where does this mnemonic stop being reliable?

Gives order of toxicity only. Urine output below 30 mL per hour also needs attention, and the antidote is calcium gluconate.

How is this useful clinically?

Checking reflexes and respiratory rate before each dose prevents toxicity.

How do I make this mnemonic stick?

Say it aloud, write it from memory tomorrow, then again in a week. Then test yourself on a OBG question about Hypertensive disorders.

Is this a standard mnemonic?

It is a teaching aid written or adapted by our team. Some resemble ones students share informally. Check any fact that matters in a standard source.