Spinal Anesthesia Clinical Trial
Official title:
Determination of the Minimum Local Anesthetic Dose (MLAD) of Spinal Chloroprocaine for Inguinal Herniorrhaphy in Ambulatory Surgery
This study is to determine the minimum effective dose for intrathecal chloroprocaine in inguinal herniorrhaphy in outpatients using a Combined Spinal Epidural (CSE) anesthesia.
A standard CSE procedure will be conducted in which the patient is placed in an upright
sitting position on the side of the operation table and a epidural Tuohy needle 18G will be
inserted into L3-L4 interspace via a loss-of-resistance technique. The dura will be punctured
using a 27-gauge pencil-point spinal needle and a certain dose of chloroprocaine 1% will be
given. After the spinal needle is withdrawn, an epidural catheter will be placed and the
epidural needle will be withdrawn. After fixation of catheter the patient will be placed in a
supine position.
The first spinal dose of chloroprocaine 1% to start with is 50mg. This dose has been
successfully used for spinal anesthesia in hernia repair outpatients to reach an adequate
analgesia. Each time there will be added 2,5 microgram of sufentanil for prolongation of the
analgesia. The testing interval is 2 mg.
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