Cerebrospinal fluid pressure changes in response to coughing

Area of Science:

• Neurology
• Neurosurgery
• Physiology

Background:

• Cerebrospinal fluid (CSF) pressure dynamics during physiological maneuvers like coughing are not fully understood.
• Previous studies have not extensively investigated the differential pressure changes between the lumbar and cisternal regions during coughing.

Purpose of the Study:

• To analyze the pressure waves in the lumbar theca and cisterna magna during coughing in sitting patients.
• To explore the potential diagnostic value of these pressure waves for various neurological conditions and spinal blockages.

Main Methods:

• CSF pressure recordings were obtained from the lumbar region and cisterna magna in 16 patients.
• Patients were in a sitting position, and isolated, low-amplitude coughs were studied.
• Pressure wave phenomena were analyzed and displayed on a differential trace.

Main Results:

• Lumbar pressure waves were observed to occur sooner and at lower amplitudes compared to cisternal waves.
• A distinct phase was identified where lumbar pressure exceeded cisternal pressure, followed by the reverse.
• The phase of cisternal pressure exceeding lumbar pressure could be prolonged.

Conclusions:

• Specific pressure wave patterns may be associated with conditions like Froin's syndrome, syringobulbia, communicating syringomyelia, and tonsillar herniation.
• Cough impulse testing shows potential as a sensitive clinical indicator for spinal blockage, possibly surpassing Queckenstedt's test.
• Further evaluation is recommended to establish the clinical utility of cough impulse testing for spinal blockage detection.