Lumbar cerebrospinal fluid opening pressure measured in a flexed lateral decubitus position in children

Area of Science:

• Pediatric Neurology
• Neurosurgery
• Critical Care Medicine

Background:

• Lumbar punctures in children are typically performed with the patient in a flexed position.
• Established normal ranges for cerebrospinal fluid (CSF) opening pressure are based on measurements taken in an extended position.
• Flexion is known to artificially elevate lumbar CSF pressure.

Purpose of the Study:

• To determine the normal range (mean +/- 2 SD) for lumbar CSF opening pressure in children.
• To provide accurate reference values for CSF pressure measured in the commonly used flexed lateral decubitus position.
• To aid in the interpretation of CSF pressure readings during pediatric lumbar punctures.

Main Methods:

• CSF opening pressure was measured in 33 pediatric patients undergoing lumbar punctures.
• Measurements were conducted in a flexed lateral decubitus position.
• Patients with conditions known to affect CSF pressure were excluded from the study.

Main Results:

• The mean CSF opening pressure was 19.0 +/- 4.4 cm H2O.
• No significant impact on CSF pressure was observed related to patient age or sex.
• Neither intrathecal chemotherapy nor sedation administration affected the measured CSF pressure.

Conclusions:

• The normal range for lumbar CSF opening pressure in children, measured in a flexed lateral decubitus position, is 10 to 28 cm H2O.
• This range provides a crucial reference for clinical practice when interpreting CSF pressure in pediatric patients.
• The findings support the use of this specific measurement position for routine pediatric lumbar punctures.