OBSbasic
How do osmotic dilators help ripen the cervix?
Answer
They absorb water, enlarge, and mechanically dilate the cervix
Explanation
Osmotic dilators are hydrophilic: they absorb water and enlarge, thereby mechanically dilating the cervix. The slides also state that mechanical methods can release endogenous prostaglandins and oxytocin. They do not function by directly rupturing membranes.
**Key takeaway:** Osmotic dilators expand after absorbing water to produce cervical dilatation.
**Glossary:** **Hydrophilic**: having an affinity for water. **Osmotic dilator**: a material that expands as it absorbs fluid.
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