Management of Pneumoventricles Following EVD Insertion

Introduction to Pneumoventricles

Pneumoventricles can occur as a complication following EVD placement and may lead to increased intracranial pressure, neurological deterioration, and even tension pneumoventricle in severe cases, highlighting the need for immediate assessment and intervention to prevent neurological deterioration and potential mortality 1

The World of Neurosurgery recommends minimizing EVD manipulation, using strict aseptic technique for all EVD access, and considering antibiotic-impregnated catheters for high-risk patients to prevent infection 1
Administer preprocedural antimicrobials, such as cefazolin, to reduce the risk of surgical site infections and central nervous system infections in patients requiring external ventricular drainage 2
Perform perioperative chlorhexidine shampoo and hair clipping, taking care to avoid skin abrasions, to minimize infection risk 2
Consider using antibiotic-impregnated catheters (minocycline and rifampin-impregnated or silver-coated), which significantly reduce infection rates (risk ratio 0.31) 2
Select appropriate catheter size and type, considering antibiotic-impregnated options, to reduce infection risk 3
Ensure EVD system is properly assembled and ready for connection, and use strict aseptic technique throughout the procedure 3
Use chlorhexidine for skin preparation to minimize infection risk 3
Apply sterile dressing to the insertion site to minimize infection risk 3
Implement standardized protocols for EVD care and maintenance, including aseptic technique for all EVD manipulations, to reduce infection risk 3, 2

Set the drip chamber at the prescribed height, typically at the level of the foramen of Monro or external auditory meatus, and ensure all connections are secure and the system is properly leveled 3
Minimize manipulation of the device and system, and follow institutional protocols for dressing changes and system maintenance 2, 3
Monitor for signs of infection or complications, and limit CSF sampling to when clinically necessary 2
Use strict aseptic technique when obtaining samples, and clean EVD access ports while wearing mask and gloves 3, 2
Avoid routine EVD exchange, as it has not been shown to reduce infection rates 2
Monitor the number of EVD catheter days, and track infection rates using a uniform definition for ventriculostomy-associated infection 3
Document all EVD parameters, including CSF output, EVD height setting, CSF appearance, and neurological status 3

Identifying and addressing the source of air entry, ensuring all connections in the EVD system are secure, and considering subcutaneous tunneling of the catheter if replacement is needed can help prevent recurrence of pneumoventricles 1
Consider subcutaneous tunneling of the catheter to reduce infection risk, especially in institutions with high infection rates 2
Minimize the duration of EVD placement when clinically feasible to reduce infection risk 2

Ensure healthcare professional training on insertion and management, and maintain staff education and competency assessment 3
Use standardized EVD order panels to minimize errors and ensure consistency in care 3