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Factors influencing epidural catheter migration
I M Bishton1, P H Martin, J M Vernon
1University Department of Anaesthesia, Queen's Medical Centre, Nottingham.
Anaesthesia
|July 1, 1992
Summary
Epidural catheter migration occurred in 36% of laboring women, with outward migration linked to patient weight and BMI. While migration didn't increase overall epidural block issues, significant outward movement correlated with failed blocks.
Area of Science:
- Anesthesiology
- Obstetrics
- Medical Devices
Background:
- Epidural analgesia is common in labor.
- Catheter migration can affect block efficacy and safety.
- Understanding migration patterns is crucial for patient care.
Purpose of the Study:
- To prospectively investigate epidural catheter migration during labor analgesia.
- To identify factors associated with catheter migration.
- To determine the impact of migration on epidural block outcomes.
Main Methods:
- Prospective randomized study of 153 women receiving labor epidural analgesia.
- Measurement of epidural catheter migration (inward/outward).
- Correlation analysis of migration with patient demographics and block outcomes.
Main Results:
- 36% of patients experienced epidural catheter migration.
- Outward migration correlated significantly with patient weight, BMI, and epidural space depth.
- No relationship found between migration and height, age, intervertebral space, or duration.
- Significant outward migration (≥2.5 cm) was associated with all failed epidural blocks.
- Migration ≥1 cm did not increase overall block problems but altered the pattern of complications.
Conclusions:
- Epidural catheter migration is a common event during labor analgesia.
- Patient characteristics like weight and BMI influence outward migration.
- While not increasing overall complication rates, significant outward migration is linked to specific adverse outcomes like failed blocks.
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