The aim of this prospective, randomized controlled trial is to compare the analgesic efficacy of transverse versus longitudinal ultrasound probe orientations during Serratus Anterior Plane (SAP) block in patients undergoing breast surgery. The study hypothesizes that the longitudinal approach (probe parallel to the ribs) may provide better craniocaudal spread of the local anesthetic, thereby resulting in lower postoperative Visual Analog Scale (VAS) scores and reduced opioid consumption compared to the standard transverse approach.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
TRIPLE
Enrollment
70
Transverse serratus anterior plane block will be performed on the patients using 20 mL of 0.375% bupivacaine under ultrasound guidance.
Longitudinal serratus anterior plane block will be performed on the patients using 20 mL of 0.375% bupivacaine under ultrasound guidance.
Ankara Etlik City Hospital
Ankara, Yenimahalle\Ankara, Turkey (Türkiye)
RECRUITINGPostoperative Pain Intensity
Pain will be assessed using a visual analog scale from 0 mm (no pain) to 100 mm (worst pain) at rest. Pain assessment will be made at 4 hour after surgery.
Time frame: 4 hour after surgery
Postoperative Pain Intensity
Pain will be assessed using a visual analog scale from 0 mm (no pain) to 100 mm (worst pain) at rest and when coughing. Pain assessment will be made at 1, 8, 12, and 24 hours after surgery.
Time frame: Up to 24 hours
Postoperative Pain Intensity
Pain will be assessed using a visual analog scale from 0 mm (no pain) to 100 mm (worst pain) while coughing. Pain assessment will be made at 1, 4, 8, 12, and 24 hours after surgery.
Time frame: Up to 24 hours
Total Postoperative Opioid Consumption
The total amount of opioid consumed by the patient will be recorded.
Time frame: Up to 24 hours
Area Under Curve for Pain
Cumulative 24-hour pain burden calculated by the trapezoidal rule
Time frame: Up to 24 hours
Assessment of Sensory Blockade Extent
Sensory extent will be assessed using pinprick testing with a 20-gauge hypodermic needle.
Time frame: Evaluated at 20 minutes following block administration.
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