An interventional study of Suprainguinal Fascia Iliaca Block and Deep Iliacus Plane Block in Hip Arthroplasty, Postoperative Pain and Regional Anesthesia, sponsored by Sivas Numune Hospital. Recruiting at 2 sites in Turkey (Türkiye). Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-04-02.
Sponsored by Sivas Numune Hospital · Not applicable, Interventional, and Treatment
This randomized, double-blind clinical trial aims to compare the effectiveness of the Deep Iliacus Plane Block (DIPB) and the Suprainguinal Fascia Iliaca Block (SIFIB) for postoperative pain control in patients undergoing primary total hip arthroplasty. Effective analgesia after hip surgery is essential for early mobilization, reduction of complications, and improved recovery outcomes.
Seventy patients scheduled for elective hip arthroplasty under spinal anesthesia will be randomly assigned to receive either DIPB or SIFIB at the end of surgery. Postoperative pain scores, opioid consumption, motor block, and block-related complications will be evaluated over a 48-hour period.
The study aims to determine whether DIPB provides superior or comparable analgesia with reduced motor blockade compared to SIFIB, thereby contributing to safer and more comprehensive postoperative pain management in hip surgery patients.
Hip arthroplasty is frequently associated with moderate to severe postoperative pain, which may negatively affect early mobilization, rehabilitation, and overall recovery. Adequate postoperative analgesia is therefore essential to reduce complications such as pulmonary morbidity, thromboembolism, delirium, and prolonged hospital stay.
The hip joint is innervated by both deep articular branches (femoral, obturator, and accessory obturator nerves) and superficial cutaneous branches (femoral nerve and lateral femoral cutaneous nerve). An optimal regional analgesic technique should provide effective blockade of both components. However, currently used techniques often fail to adequately block deep capsular innervation while preserving motor function.
The suprainguinal fascia iliaca block (SIFIB) is widely used in hip surgery and effectively blocks the femoral nerve and lateral femoral cutaneous nerve, providing reliable cutaneous analgesia. Nevertheless, insufficient spread to obturator and accessory obturator nerves may result in inadequate deep joint analgesia. Attempts to overcome this limitation using high-volume injections may increase the risk of quadriceps weakness and motor blockade.
The Deep Iliacus Plane Block (DIPB) is a recently described fascial plane block targeting the deep surface of the iliacus muscle at the level of the anterior inferior iliac spine. Anatomical and preliminary clinical findings suggest that DIPB allows spread of local anesthetic to femoral, lateral femoral cutaneous, and pericapsular articular branches of the hip joint, potentially providing both capsular and cutaneous analgesia with reduced motor impairment. DIPB has therefore been proposed as a hybrid technique combining advantages of existing regional blocks.
This prospective, randomized, controlled, double-blind clinical trial will be conducted at Sivas Numune Hospital. Seventy patients (ASA I-III) scheduled for elective primary total hip arthroplasty under spinal anesthesia will be enrolled and randomly assigned into two groups: the SIFIB group (n=35) and the DIPB group (n=35). Randomization will be performed using a computer-generated sequence.
All patients will receive standardized spinal anesthesia and multimodal systemic analgesia. At the end of surgery, ultrasound-guided SIFIB or DIPB will be performed by an experienced anesthesiologist using 0.25% bupivacaine (30-40 mL, weight-adjusted). Postoperative pain will be assessed using the Numeric Rating Scale (NRS) at rest and during movement at predetermined intervals up to 48 hours. Rescue analgesia with intravenous tramadol will be administered when NRS ≥4, and total opioid consumption will be recorded. Motor blockade will be evaluated using the modified Bromage scale. Block-related complications and adverse events will also be documented.
The primary aim of the study is to compare postoperative pain scores and opioid consumption between DIPB and SIFIB. Secondary outcomes include motor blockade, block-related complications, and overall analgesic effectiveness. The findings of this study are expected to clarify whether DIPB provides superior or comparable analgesia with less motor impairment, thereby contributing to safer and more comprehensive postoperative pain management in hip arthroplasty patients.
5,093 studies on the registry are indexed under Pain, Postoperative; 1,140 are open to participants now.
This study's planned enrollment of 70 is close to the median of 75 across 4,344 interventional studies indexed under Pain, Postoperative.
Browse Pain, Postoperative studies →This is the only study on the registry with Sivas Numune Hospital as lead sponsor.
Counted across the registry records on this site, refreshed daily.
Exclusion Criteria:
Participants randomized to this arm will receive an ultrasound-guided suprainguinal fascia iliaca compartment block at the end of surgery using 0.25% bupivacaine (30-40 mL, weight-adjusted) for postoperative analgesia following primary total hip arthroplasty.
Procedure: Suprainguinal Fascia Iliaca Block
Participants randomized to this arm will receive an ultrasound-guided deep iliacus plane block at the end of surgery using 0.25% bupivacaine (30-40 mL, weight-adjusted) for postoperative analgesia following primary total hip arthroplasty.
Procedure: Deep Iliacus Plane Block
Ultrasound-guided suprainguinal fascia iliaca compartment block performed at the end of surgery using 0.25% bupivacaine (30-40 mL, weight-adjusted) for postoperative analgesia following primary total hip arthroplasty.
Ultrasound-guided deep iliacus plane block performed at the end of surgery using 0.25% bupivacaine (30-40 mL, weight-adjusted) for postoperative analgesia following primary total hip arthroplasty.
Postoperative pain intensity
Postoperative pain assessed using the Numeric Rating Scale (NRS; 0 = no pain, 10 = worst pain imaginable) at rest and during movement following total hip arthroplasty.
Time frame: 2, 4, 8, 16, 24, and 48 hours postoperatively
Opioid consumption
Total rescue opioid consumption (intravenous tramadol) administered for postoperative pain management.
Time frame: From the end of surgery to 48 hours postoperatively
Motor block
Motor blockade assessed using the Modified Bromage Scale (0-3), where higher scores indicate greater motor impairment of the lower extremity following regional anesthesia.
Time frame: 4, 8, 16, 24, and 48 hours postoperatively
Pain during movement
Pain during movement assessed using the Numeric Rating Scale (NRS; 0 = no pain, 10 = worst imaginable pain), where higher scores indicate greater pain intensity.
Time frame: 2, 4, 8, 16, 24, and 48 hours postoperatively
Plan to share: No
Eligibility is decided by the study team. Share this record with your doctor or contact the team directly.
Contact study teamGet an email when the registry record changes — status, dates, results — or when someone posts here.
Sign in to followQuestions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.
Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.
Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.