What are the differences between low-dose and normal epidurals?

Not much: Epidurals are constant infusions of medication that can be either just an anesthetic or a combination with a narcotic. The dose can be altered easily to be low-dose or whatever dose is necessary for the woman's comfort. There is a different medication also given into the back, itn, which is a single shot of narcotics and doesn't provide as dense pain relief.

Epidurals: This simply refers to the dose of anesthetic given. With low dose we block fibers only involved with certain pathways - hence you will not be totally numb and unbale to walk. With a regular epidural usually everything is blocked and you usually cannot walk until it wears off.

Not for surgery: The concept of "low-dose" usually applies to the use of local anesthetic for childbirth or post-op pain relief. Normal doses are used for surgery to produce a complete block of sensation and movement. A complete block prevents a patient from walking, pushing strongly during childbirth, or moving in bed. Also, blood pressure and other vital signs must be closely. Low doses may allow walking.

Not sure: but sounds like low-dose means low dose steroid. Some research shows that low dose steroid injections work as well as high dose steroid injections (which is current standard of care).