What are some practical
recommendations regard-ing neuraxial anesthesia in the parturient who presents
with a low platelet count?
If the decision is made to proceed with
neuraxial anesthesia, a subarachnoid block using a small-caliber spinal needle
is preferable to epidural anesthesia. This is not always possible, especially
for women in labor who will require repeated doses of local anesthetic. An
epidural anesthetic should be placed using a midline technique. The lowest
concentration of local anesthetic necessary to pro-duce analgesia while
preserving motor function should be used. The patient should be examined every
1–2 hours to assess the extent of the motor block, and these examina-tions
should continue until after the anesthetic has worn off and the catheter has
been removed. In this way, if the patient develops a motor block out of
proportion to what one would expect, or if the anesthetic has a prolonged
duration of action, the patient can be immediately assessed with MRI for the
development of an epidural hematoma. Immediate evaluation is necessary because
an emergent laminectomy and decompression must be performed within 6–12 hours
of diagnosis to preserve neurologic function. If a patient develops a
coagulopathy with an epidural catheter already in situ, the catheter should be
removed only after the coagulation status is corrected.
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