b. Anesthetic. Anesthetic refers to a technique or medication that partially or
completely eliminates sensation or feeling. There are two types of nerve-blocking
anesthetics, local and regional. Local anesthetics block sensory nerve pathways at the
organ level. Regional anesthetics block sensory nerve pathways along the course of
tissues. Refer to figure 4-3 for the level of anesthesia necessary for cesarean and
Figure 4-3. Level of anesthesia for cesarean and vaginal delivery.
c. Sedative or Tranquilizer. This refers to a medication that relieves anxiety
and quiets the patient. It may combine with analgesics to enhance the effects of
analgesics (although that effect is now being questioned). The primary ones for
Phenergan --given more for its antiemetic effect.
Antiemetic refers to preventing or alleviating nausea and vomiting.
NERVE-BLOCKING ANESTHETICS USED IN OBSTETRICS
a. Local. Local anesthetics produces anesthesia only in the area where
injected. It is used in the superficial nerves of the perineum to make or repair
episiotomy. Lidocaine 1percent drug normally used and is short acting. Local
anesthetics are used frequently for delivery.
b. Regional. Regional anesthetics include paracervical block, pudendal block,
saddle block (low spinal), and caudal or lumbar epidural. (See figure 4-4.)