About this trial
This randomized, prospective, single-blinded study aims to compare the efficacy of ultrasound-guided serratus anterior plane (SAP) block combined with serratus-intercostal interfascial plane (SIP) block versus local wound infiltration (LWI) for postoperative analgesia in patients undergoing minimally invasive cardiac surgery (MICS). The primary outcome is total perioperative and postoperative opioid consumption. Secondary outcomes include postoperative pain scores (NRS), opioid-related side effects, block-related complications, and ICU stay duration.
Eligibility criteria
This trial does not accept healthy volunteersQualifiers
Age 18-75 years
Undergoing MICS with left-sided 4th-5th intercostal incision
ASA I-III
Informed consent provided
Disqualifiers
Coagulopathy or on anticoagulants
Allergy to local anesthetics or opioids
Local infection at block site
Pregnancy or lactation
Trial design
Single group
Treatments tested in this trial
Ultrasound-guided serratus anterior plane block and serratus-intercostal interfascial plane block with bupivacaine
Procedure/SurgeryParticipants will receive an ultrasound-guided serratus anterior plane (SAP) block using 30 mL of 0.25% bupivacaine combined with a serratus-intercostal interfascial plane (SIP) block using 10 mL of 0.25% bupivacaine. Both blocks will be administered after surgery but before emergence from anesthesia. This combination targets multiple interfascial planes to enhance postoperative analgesia in patients undergoing minimally invasive cardiac surgery (MICS).
Local wound infiltration with bupivacaine
Procedure/SurgeryParticipants will receive local wound infiltration with 40 mL of 0.25% bupivacaine applied to the surgical and drain sites following surgery. This approach represents a standard method for managing postoperative pain in MICS patients and serves as the active comparator.
Treatment groups
Trial outcomes
Primary outcomes
o Total opioid consumption (mcg of fentanyl and mg of tramadol) in the first 48 hours postoperatively.
The cumulative perioperative and postoperative opioid consumption measured in micrograms of fentanyl and milligrams of tramadol administered during the first 48 hours after surgery.
Secondary outcomes
NRS pain scores (static and dynamic) at 0, 2, 4, 8, 16, 24, 48, and 72 hours postoperatively.
Pain intensity will be assessed using the Numeric Rating Scale (NRS) at rest and during movement at predefined postoperative time points (0, 2, 4, 8, 16, 24, 48, and 72 hours).
Sponsors and contacts
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