Overview
This lecture demonstrates how to check for ankle clonus, especially in the context of preeclampsia, to assess neurological status and seizure risk.
Importance of Clonus Assessment in Preeclampsia
- Clonus and hyperreflexia are signs of central nervous system irritability in preeclampsia.
- Presence of clonus indicates increased seizure risk.
Steps for Checking Ankle Clonus
- Have the patient sit with feet dangling.
- Support the lower leg of the foot you want to test.
- Quickly dorsiflex (bend upward) the foot.
- Observe the foot's response after releasing.
Interpreting Clonus Results
- A normal (negative) clonus: foot returns to normal position without rhythmic movements.
- A positive clonus: foot rhythmically bounces or beats three or more times after dorsiflexion.
Key Terms & Definitions
- Preeclampsia — A pregnancy complication characterized by high blood pressure and signs of organ damage.
- Hyperreflexia — Overactive reflexes, often seen in neurological conditions.
- Clonus — Rhythmic, involuntary muscle contractions and relaxations, usually observed by quickly dorsiflexing the foot.
- Dorsiflexion — Movement that brings the top of the foot toward the shin.
Action Items / Next Steps
- Practice clonus assessment technique as demonstrated.
- Review additional lectures in the maternity series for further learning.