US-Guided Quadro-Iliac Plane Block for Postoperative Analgesia After Lumbar Instrumentation

Evaluation of the Effectiveness of Ultrasound-Guided Quadro-Iliac Plane Block in Postoperative Analgesia Management Following Lumbar Instrumentation Surgery

Lumbar instrumentation surgery is associated with significant postoperative pain. This study evaluates the analgesic effectiveness of the ultrasound-guided Quadro-Iliac Plane Block in patients undergoing lumbar instrumentation surgery, aiming to assess the efficacy of this newly developed technique for postoperative pain management.

Lumbar instrumentation surgery is associated with significant postoperative pain, which may reduce patient comfort, delay early mobilization, and increase analgesic requirements. Effective postoperative pain management is essential for enhancing recovery and reducing postoperative morbidity. In this context, regional anesthesia techniques have become an important component of multimodal analgesia strategies.

The Quadro-Iliac Plane Block is a newly described ultrasound-guided regional analgesia technique. This block aims to provide effective analgesia by targeting the relevant branches of the lumbar nerves supplying the surgical area. However, clinical evidence regarding its effectiveness in postoperative analgesia following lumbar instrumentation surgery remains limited.

This study aims to evaluate the postoperative analgesic effectiveness of the ultrasound-guided Quadro-Iliac Plane Block in patients undergoing lumbar instrumentation surgery. The findings of this study are expected to contribute to the assessment of this newly developed technique as a safe and effective option for postoperative pain management in lumbar spine surgery.

Inclusion Criteria:

• Classified as American Society of Anesthesiologists (ASA) physical status I-III
• Scheduled for elective lumbar instrumentation surgery
• Surgery performed under general anesthesia
• Provision of written informed consent

Exclusion Criteria:

• Use of anticoagulant or antiplatelet medications
• Presence of bleeding diathesis or coagulation disorders
• Known allergy or hypersensitivity to local anesthetics or opioid medications
• Infection at the planned block site
• Alcohol or drug dependence
• Cognitive impairment preventing reliable pain assessment using the NRS
• Pregnancy or lactation
• History of previous lumbar spine surgery
• Diabetes mellitus
• Renal or hepatic impairment