Study: NCT02431065

Intervention type: PROCEDURE
Group type: PLACEBO_COMPARATOR
Intervention: Rectus sheath block
Description: Local anesthetics (Ropivacaine 0.75% 10ml) or normal saline (10ml) will be injected in the rectus sheath via different methods:~1. Control group Normal saline 10mL will be injected under ultrasonography guidance into the right, left rectus sheath at the end of the operation before emergence from general anesthesia.~2. Ultrasonography group Local anesthetic (Ropivacaine 0.75% 10 mL) will be injected under ultrasonography guidance into the right left rectus sheath at the end of the operation before emergence from general anesthesia.~3. Direct injection group Local anesthetic (Ropivacaine 0.75% 10 mL) will be injected under direct visualization into the right, left rectus sheath at the end of the operation before emergence from general anesthesia.

Intervention type: PROCEDURE
Group type: ACTIVE_COMPARATOR
Intervention: Rectus sheath block
Description: Local anesthetics (Ropivacaine 0.75% 10ml) or normal saline (10ml) will be injected in the rectus sheath via different methods:~1. Control group Normal saline 10mL will be injected under ultrasonography guidance into the right, left rectus sheath at the end of the operation before emergence from general anesthesia.~2. Ultrasonography group Local anesthetic (Ropivacaine 0.75% 10 mL) will be injected under ultrasonography guidance into the right left rectus sheath at the end of the operation before emergence from general anesthesia.~3. Direct injection group Local anesthetic (Ropivacaine 0.75% 10 mL) will be injected under direct visualization into the right, left rectus sheath at the end of the operation before emergence from general anesthesia.

Intervention type: PROCEDURE
Group type: EXPERIMENTAL
Intervention: Rectus sheath block
Description: Local anesthetics (Ropivacaine 0.75% 10ml) or normal saline (10ml) will be injected in the rectus sheath via different methods:~1. Control group Normal saline 10mL will be injected under ultrasonography guidance into the right, left rectus sheath at the end of the operation before emergence from general anesthesia.~2. Ultrasonography group Local anesthetic (Ropivacaine 0.75% 10 mL) will be injected under ultrasonography guidance into the right left rectus sheath at the end of the operation before emergence from general anesthesia.~3. Direct injection group Local anesthetic (Ropivacaine 0.75% 10 mL) will be injected under direct visualization into the right, left rectus sheath at the end of the operation before emergence from general anesthesia.

Intervention type: DRUG
Group type: ACTIVE_COMPARATOR
Intervention: Ropivacaine
Description: Local anesthetics (Ropivacaine 0.75% 10ml) or normal saline (10ml) will be injected in the rectus sheath via different methods:~1. Control group Normal saline 10mL will be injected under ultrasonography guidance into the right, left rectus sheath at the end of the operation before emergence from general anesthesia.~2. Ultrasonography group Local anesthetic (Ropivacaine 0.75% 10 mL) will be injected under ultrasonography guidance into the right left rectus sheath at the end of the operation before emergence from general anesthesia.~3. Direct injection group Local anesthetic (Ropivacaine 0.75% 10 mL) will be injected under direct visualization into the right, left rectus sheath at the end of the operation before emergence from general anesthesia.

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Ropivacaine
Description: Local anesthetics (Ropivacaine 0.75% 10ml) or normal saline (10ml) will be injected in the rectus sheath via different methods:~1. Control group Normal saline 10mL will be injected under ultrasonography guidance into the right, left rectus sheath at the end of the operation before emergence from general anesthesia.~2. Ultrasonography group Local anesthetic (Ropivacaine 0.75% 10 mL) will be injected under ultrasonography guidance into the right left rectus sheath at the end of the operation before emergence from general anesthesia.~3. Direct injection group Local anesthetic (Ropivacaine 0.75% 10 mL) will be injected under direct visualization into the right, left rectus sheath at the end of the operation before emergence from general anesthesia.

Intervention type: OTHER
Group type: PLACEBO_COMPARATOR
Intervention: Normal saline
Description: Local anesthetics (Ropivacaine 0.75% 10ml) or normal saline (10ml) will be injected in the rectus sheath via different methods:~1. Control group Normal saline 10mL will be injected under ultrasonography guidance into the right, left rectus sheath at the end of the operation before emergence from general anesthesia.~2. Ultrasonography group Local anesthetic (Ropivacaine 0.75% 10 mL) will be injected under ultrasonography guidance into the right left rectus sheath at the end of the operation before emergence from general anesthesia.~3. Direct injection group Local anesthetic (Ropivacaine 0.75% 10 mL) will be injected under direct visualization into the right, left rectus sheath at the end of the operation before emergence from general anesthesia.