However, this changes in the second series after he becomes a victim of a subdural hematoma and, as a result, becomes more vulnerable.

The optic nerve is ensheathed in all three meningeal layers (dura, arachnoid, and pia mater) rather than the epineurium, perineurium, and endoneurium found in peripheral nerves.

The line carrying the drug may be threaded under the skin to emerge at the front of the patient, a process called tunneling , recommended with long term use to reduce the chance of any infection at the exit site reaching the epidural space.

A small number of babies who collapse and die unexpectedly in their first year are found to have one or more of the following three symptoms in common bleeding just outside the brain (subdural hemorrhage) bleeding at the back of the eye (retinal hemorrhage) and brain swelling.