None listed
Conditions
Interventions
None listed
Sponsors
The Catholic University of Korea, Eunpyeong St. Mary's Hospital
Eligibility
Sex/Gender
All
Inclusion criteria
Inclusion criteria: 1. Adult patients aged 19 to 74 years 2. Patients scheduled for laparoscopic cholecystectomy at Eunpyeong St. Mary’s Hospital 3. Patients undergoing a rectus sheath block for perioperative analgesia before surgery 4. Patients receiving a rectus sheath block with either 20 mL of 0.5% ropivacaine or 20 mL of 0.25% ropivacaine as part of routine clinical practice 5. Patients able to undergo shear wave elastographic assessment of rectus abdominis muscle stiffness before the block and 20 minutes after the block 6. Patients able to undergo stiffness measurement in both the resting state and during standardized active contraction using leg raising 7. Patients able to undergo sensory assessment and pain evaluation in the PACU and ward 8. Patients who voluntarily provide written informed consent after receiving a full explanation of the study purpose and procedures
Exclusion criteria
Exclusion criteria: 1. Patients who decline participation or are unable to provide written informed consent 2. Patients with known hypersensitivity or allergy to ropivacaine or other amide-type local anesthetics 3. Patients with local infection at the intended block site or clinically significant systemic infection 4. Patients considered unsuitable for the planned rectus sheath block by the attending anesthesiologist because of current bleeding risk, coagulopathy, or antithrombotic medication status 5. Patients with pre-existing abdominal wall neurologic abnormalities, significant structural abnormalities of the abdominal wall muscle or fascia, or other conditions that may interfere with interpretation of rectus muscle stiffness or sensory assessment 6. Patients who are unable to understand or cooperate with the study procedures, making serial shear wave elastography assessment in both the resting state and during leg raising unreliable 7. Patients in whom the rectus sheath block is performed with a concentration or volume different from the study protocol, or who receive additional abdominal wall block(s) before the primary assessment at 20 minutes 8. Patients for whom reliable measurement or interpretation of the primary outcomes is judged to be difficult by the investigators
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Peak port-site pain score during ambulation on postoperative day 1 | — |
Secondary
| Measure | Time frame |
|---|---|
| Change in rectus abdominis muscle stiffness in the resting state from baseline to 20 minutes after rectus sheath block;Change in the difference between active and resting rectus abdominis muscle stiffness from baseline to 20 minutes after rectus sheath block;Loss of cold sensation in the target abdominal wall area at 20 minutes after rectus sheath block;Peak port-site pain score during PACU stay;Cumulative rescue analgesic consumption during PACU stay;Cumulative analgesic consumption on postoperative day 1;Change in rectus abdominis muscle stiffness during standardized active contraction using leg raising from baseline to 20 minutes after rectus sheath block | — |
Countries
Korea, Republic of
Contacts
Public ContactMinsuk Chae
The Catholic University of Korea, Eunpyeong St. Mary's Hospital
Outcome results
None listed