EVD vs Bolt vs JP drain

https://teachmesurgery.com/neurosurgery/flow-and-pressure/icp-monitoring/

https://jomi.com/article/357/emergent-right-frontal-camino-bolt-placement-for-intracranial-pressure-monitoring-for-a-gcs-under-8#:~:text=The%20Camino%20Micro%20Ventricular%20Bolt,of%20intracranial%20swelling%20or%20bleeding.

https://my.clevelandclinic.org/health/articles/21104-jackson-pratt-jp-drain

“In neurosurgery, an external ventricular drain (EVD) is a device used to drain cerebrospinal fluid (CSF) and monitor intracranial pressure (ICP), while a bolt is a type of device used to monitor ICP only, not drain CSF. EVDs are typically placed in the ventricle of the brain, often through a burr hole, and can be either tunnelled or bolt-connected. Bolt devices, also inserted through a burr hole, are simpler and less invasive than EVDs, but they do not allow for CSF drainage. 

Key Differences:

• Drainage:

  EVDs are designed to drain CSF, which can help relieve pressure on the brain and manage conditions like hydrocephalus. Bolts, on the other hand, are primarily for ICP monitoring and do not drain fluid. 

• Complexity:

  EVDs are generally more complex to insert than bolts, particularly when using a tunnelled approach. Bolt insertion is a simpler procedure. 

• Infection Risk:

  Some studies suggest that bolt-connected EVDs may have a lower risk of infection compared to traditional tunnelled EVDs. 

• Accuracy:

  Studies have shown that bolt-connected EVDs can be more accurate in placement than tunnelled EVDs. 

• Complications:

  While bolt-connected EVDs may have fewer complications like CSF leakage or accidental disconnection, the overall complication rates can be similar to traditional tunnelled EVDs in some studies. 

• Cost:

  Bolt EVD kits are generally less expensive than tunnelled EVD placement, which often occurs in an operating room. 

In essence:

• EVD:

  Monitors ICP and drains CSF, more complex and invasive, but potentially life-saving in certain situations. 

• Bolt:

  Monitors ICP only, simpler and less invasive, but doesn't allow for CSF drainage. “