Clinical Research Directory

Effect of Adding Ultrasound-Guided PECS II Block to Standard Multimodal Analgesia in Breast Augmentation Surgery

This randomized, controlled clinical study will evaluate the effect of an ultrasound-guided PECS II block on postoperative pain control in patients undergoing elective augmentation mammoplasty. A total of 50 adult female patients aged 18-65 years who meet the eligibility criteria and provide written informed consent are planned to be enrolled. Participants will be randomly assigned to two groups using a computer-generated randomization method. Participants in the PECS II group will receive an ultrasound-guided PECS II block after induction of general anesthesia and before surgical incision, in addition to standard postoperative multimodal analgesia. Participants in the control group will receive standard postoperative multimodal analgesia without a PECS II block or placebo procedure. The primary objective is to evaluate postoperative pain intensity using the visual analog scale (VAS) at 1, 6, 12, and 24 hours after surgery. Secondary outcomes will include analgesic consumption, additional analgesic requirements, postoperative nausea and vomiting, and potential complications associated with the block. Outcomes will be compared between the two groups to assess the effect of the PECS II block on postoperative pain control.

Mid-point Transverse Process to Pleura Block VS Serratus Anterior Plane Block for Postoperative Analgesia After Modified Radical Mastectomy

This study aimed to compare the analgesic efficacy of ultrasound-guided mid-point transverse process-to-pleura block versus serratus anterior plane block after unilateral modified radical mastectomy.

Comparison of the Effects of Sacral Erector Spinae Plane Block and Dorsal Penile Block on Postoperative Pain in Circumcision Procedures

Egypt performed circumcision in 2300 BC, although its origin is unknown. Some societies use circumcision for health, whereas others do it for religious and cultural reasons . Our competent pediatric surgeons perform circumcisions without ultrasonography using midazolam (0.1 mg/kg) premedication and penile block. In addition to penile block, general anesthesia is given using sevoflurane, ketamine, fentanyl, and propofol, depending on age and weight, for intraoperative anesthesia and analgesia. Penis procedures are frequently simple (phimosis, circumcision), but the pain is significant and long-lasting, affecting young patients' postoperative recovery. The topic of analgesia remains relevant and important in anesthesia practice. Early patient mobilization and discharge are crucial. Pediatric opioid use is questioned due to adverse effects include somnolence, vomiting, and respiratory depression. The advent of ultrasound-guided nerve blocks has revolutionized regional anesthesia in pediatrics. Many upper and lower abdominal operations use truncal blocks with good success and patient safety. Since its applicability, ease of anatomical approach, distance to the medulla spinalis and surgical site, and minimal risk of infection, sacral ESP block has become a popular method for youngsters. Postoperative pain trials demonstrate it works well.

RIPB Versus EOIPB for Pain Control After Laparoscopic Cholecystectomy

This prospective observational study aims to compare the effects of bilateral ultrasound-guided recto-intercostal plane block(RIPB) and bilateral ultrasound-guided external oblique intercostal plane block(EOIPB) on postoperative analgesia in patients undergoing elective laparoscopic cholecystectomy under general anesthesia. Both blocks are performed after anesthesia induction as part of routine preemptive multimodal analgesia practice. Patients who receive bilateral recto-intercostal plane block will be included in the RIPB group, and patients who receive bilateral external oblique intercostal plane block will be included in the EOIPB group. The primary outcome is cumulative intravenous tramadol consumption via patient-controlled analgesia during the first 24 postoperative hours. Secondary outcomes include postoperative pain scores at rest and during activity, rescue analgesic requirement, postoperative nausea and vomiting, time to mobilization, length of hospital stay, quality of recovery assessed using the Quality of Recovery-15 questionnaire, and block-related complications.

Efficacy and Safety of Anrikefon Injection for the Treatment of Postoperative Pain in Patients Undergoing Totally Laparoscopic Radical Distal Gastrectomy

Anruikefen is a peripherally highly selective kappa receptor agonist that does not easily cross the blood-brain barrier, resulting in a low incidence of central adverse reactions such as respiratory depression, sedation, and addiction. As a Class 1 new drug, it was approved for marketing in China on May 13, 2025, and is indicated for the treatment of postoperative pain following abdominal surgery. Results from two Phase Ⅲ randomized controlled trials (RCTs) of Anruikefen have demonstrated its significant analgesic efficacy, with the incidence of postoperative nausea and vomiting (PONV) being 50% significantly lower than that in the placebo group, which confirms the favorable safety profile of Anruikefen Injection. Therefore, this investigator-initiated trial (IIT) is designed to further verify the efficacy and safety of Anruikefen in patients undergoing total laparoscopic distal gastrectomy for gastric cancer.

A Predictive Model for Postoperative Analgesic Requirements After Abdominal Surgery

Postoperative pain remains a common challenge after abdominal surgery despite the use of standard multimodal pain management strategies. Poorly controlled pain can delay recovery, limit early mobilisation, reduce patient comfort, and increase the risk of longer-term pain problems. This study aims to develop a predictive model to better understand and anticipate patients' postoperative pain relief needs after abdominal surgery. The study will observe adults undergoing elective abdominal surgery and collect information on their pain scores, pain medication use, surgical characteristics, and recovery during the first 48 hours after surgery. Participants will receive standard postoperative pain management according to usual clinical practice. The study will analyse patterns of rescue pain medication use, including when and how often additional pain relief is required after surgery. The collected information will be used to develop a model that can predict factors associated with increased pain medication requirements. The goal of this research is to improve understanding of individual differences in postoperative pain and provide a foundation for more personalised pain management strategies in the future. The findings may help healthcare providers identify patients who are more likely to require additional pain relief and support the development of safer and more effective approaches to postoperative pain control.

Deep Iliacus Plane Block Versus Transmuscular Quadratus Lumborum Block for Postoperative Analgesia After Total Hip Arthroplasty

This study aims to compare the analgesic efficacy, opioid consumption, motor function preservation, and quality of recovery of ultrasound-guided deep iliacus plane block (DIPB) and transmuscular quadratus lumborum block (QLB) in patients undergoing total hip arthroplasty (THA).

Ultrasound Guided Versus Surgical Rectus Sheath Block Versus Local Anesthesia Infiltration for Postoperative Analgesia in Patients Undergoing Total Abdominal Hysterectomy

The aim of this work is to compare the efficacy and safety of the effectiveness and safety of ultrasound-guided surgical rectus sheath block and local anesthetic infiltration for postoperative analgesia in patients undergoing total abdominal hysterectomy.

Ultrasound Guided Rectus Sheath Block Versus Intrathecal Morphine for Postoperative Analgesia in Patients Undergoing Open Total Abdominal Hysterectomy

This study aims to compare the effectiveness and safety of ultrasound-guided rectus sheath block versus intrathecal morphine for postoperative analgesia in patients undergoing open total abdominal hysterectomy.

Oliceridine Versus Sufentanil Analgesia for Postoperative Patients With Obstructive Sleep Apnea

Opioids are frequently used for postoperative analgesia but may induce side effects. Opioid-induced respiratory depression is the most dangerous side effect of opioids. Patients with obstructive sleep apnea (OSA) are at higher risk for opioid-induced respiratory depression. Oliceridine is a novel biased μ-opioid receptor agonist that selectively engages the G-protein pathway while reducing β-arrestin recruitment and thus may lower the risk of respiratory depression. The goal of this observational study is to compare the effects of oliceridine versus sufentanil analgesia on the incidence of postoperative respiratory depression in patients with known or suspected OSA in the postoperative period following elective surgery.

Comparison the Analgesic Efficacy of Ultrasonographic Bilateral TAP and Anesthetic Infiltration Into the Surgery Field for Laparoscopic Unilateral TEP Herniorrhaphy

Laparoscopic inguinal hernia repair is a common surgical procedure, but postoperative pain management remains a challenge. This prospective, randomized study aims to compare the analgesic efficacy of preperitoneal and surgical site anesthetic infiltration with ultrasound-guided bilateral transversus abdominis plane (TAP) block in patients undergoing laparoscopic unilateral total extraperitoneal (TEP) herniorrhaphy. Sixty patients will be randomly allocated into two groups: Group-I will receive preperitoneal and surgical site infiltration with bupivacaine, while Group-II will receive ultrasound-guided bilateral TAP block with bupivacaine. The primary outcomes will be postoperative pain scores assessed using the visual analog scale (VAS) and additional analgesic requirements. Secondary outcomes will include postoperative hospital stay duration and cost-effectiveness. Demographic data, ASA scores, comorbidities, and operation times will be recorded. Postoperative pain will be managed with a multimodal approach, including paracetamol and NSAIDs. Rescue analgesia will be provided with intravenous paracetamol. Statistical analysis will be performed using t-tests, ANOVA, Wilcoxon-Mann-Whitney tests, and chi-square tests, as appropriate. This study aims to determine the optimal and most beneficial method for postoperative pain management and patient comfort following laparoscopic inguinal hernia repair.

Transversalis Fascia Plane Versus Transversus Abdominis Plane Block for Postoperative Analgesia in Children

This prospective clinical study aims to compare the postoperative analgesic efficacy of the ultrasound-guided transversalis fascia plane block (TFPB) and the transversus abdominis plane (TAP) block in pediatric patients undergoing laparoscopic surgery. Effective and long-lasting postoperative analgesia is essential for patient and parental satisfaction in pediatric anesthesia. With recent advances in ultrasound technology, regional anesthesia techniques have become increasingly utilized in pediatric practice. In the TAP block, local anesthetic is injected between the internal oblique and transversus abdominis muscles, providing analgesia typically between Torachal vertebra 10 (T10) and Lumbar vertebra (L1) dermatomes. The transversalis fascia plane block, developed as a modification of this approach, targets the proximal portions of the T12 and L1 nerves by depositing local anesthetic between the transversus abdominis muscle and the transversalis fascia, potentially offering wider sensory coverage. This study compares both blocks in terms of postoperative pain scores, duration of analgesia, and requirement for rescue analgesics in children undergoing laparoscopic surgery. The results are expected to contribute to the optimization of regional anesthesia techniques and improve pain management strategies in pediatric surgical patients.

Evaluation of Safety and Efficacy of Nalbuphine Versus Morphine for Postoperative Analgesia

Evaluation of safety and efficacy of Nalbuphine versus Morphine patient controlled intravenous analgesia (PCIA) for the treatment of postoperative analgesia

The Effect of Liposomal Bupivacaine Erector Spinae Plane Block

This is a single-center, randomized, controlled, double-blind clinical trial. A total of 148 patients undergoing elective open upper abdominal surgery will be included and randomly assigned 1:1 to receive ultrasound-guided erector spinae plane block with liposome bupivacaine plus bupivacaine hydrochloride or bupivacaine hydrochloride alone. The primary outcome is the AUC of resting pain scores from 0 to 72 hours postoperatively. This study aims to evaluate the analgesic efficacy and safety of liposome bupivacaine and provide a long-acting and safe postoperative analgesia strategy.

Effect of Oliceridine Analgesia on Postoperative Nause and Vomiting

Postoperative nausea and vomiting (PONV) is common after surgery and impede rapid recovery after surgery. Patients who undergo laparoscopic colorectal surgery are more likely to develop PONV due to the pneumoperitoneum, interruption of gastrointestinal system, delay of oral feeding, and nasogastric catheterization, as well as postoperative opioid analgesic requirement to control acute pain. Oliceridine is a novel selective μ-opioid agonist. It stimulates G protein signalling but is markedly less potent than morphine for β-arrestin recruitment; the latter contributes to opioid-related adverse events including PONV. It is postulated that G protein-biased agonists may deliver effective analgesia with fewer opioid-related adverse events. This randomized trial aimed to investigate whether oliceridine for patient-controlled analgesia can decrease the incidence of PONV in patients recovering from laparoscopic colorectal surgery.

Impact of Bupivacaine Dilution With Dextrose or Saline on Infraclavicular Block Outcomes

D5W) has long been used as an intravenous fluid for hydration and energy supplementation and has recently gained increasing clinical interest in perineural injection therapies and ultrasound-guided hydrodissection. D5W has been shown to improve pain and functional outcomes in entrapment neuropathies by mechanically releasing perineural adhesions and potentially modulating neurogenic inflammation. In contrast, 0.9% sodium chloride (normal saline) is routinely used as a dilution medium for local anesthetics in peripheral nerve blocks; however, emerging evidence suggests that alternative diluents such as D5W may influence block onset and efficacy. The infraclavicular block is a commonly used ultrasound-guided technique for brachial plexus anesthesia, providing reliable anesthesia and postoperative analgesia for upper extremity surgery. This study aims to compare the effects of diluting bupivacaine with either D5W or 0.9% NaCl on block success and duration of analgesia in patients undergoing infraclavicular block. Secondary outcomes include block onset characteristics, sensory and motor block profiles, and perioperative analgesic requirements. The findings may help determine whether D5W represents a safe and effective alternative diluent to saline in routine regional anesthesia practice.

Dual Subsartorial Versus Adductor Canal Block Versus Femoral Nerve Block for Postoperative Analgesia in Patients Undergoing Total Knee Arthroplasty

This study aims to compare the effect of dual subsartorial block (DSB), adductor canal block (ACB), and femoral nerve block (FNB) for postoperative analgesia in patients undergoing total knee arthroplasty (TKA).

Comparison of Two Dosing Regimens of Intravenous Ketorolac for Post-Cesarean Pain Control

we aim to compare the analgesic efficacy of two intravenous ketorolac dosing regimens as part of a multimodal analgesic protocol that includes local wound infiltration for postoperative pain management after elective cesarean delivery.

Fascial Plane Blocks In Cardiac Surgery

The aim of the present study is to evaluate the effects of the recto-intercostal fascial plane block (RIFPB) or the rectus sheath block (RSB) combined with the pectoral-intercostal fascial plane block (PIFPB) on postoperative analgesia in patients undergoing cardiac surgery.

The Effects of Dexamethasone and Ibuprofen on Postoperative Analgesia in Patients Undergoing Hand and Forearm Surgery With Axillary Brachial Plexus Block

This study aims to comparatively examine the effects of preemptive intravenous dexamethasone and intravenous ibuprofen use on the duration of analgesia in ultrasound-guided Axillary Brachial Plexus Block applications for patients undergoing hand and forearm surgery. Furthermore, investigating the relationship between the study drugs and the incidence of Postoperative Nausea and Vomiting and determining the time until the first use of rescue analgesic are also among the secondary objectives.

Oliceridine Versus Sufentanil for Postoperative Nausea in Cerebellopontine Angle Surgery

This single-center, double-blind, randomized controlled trial aims to determine whether oliceridine for patient-controlled intravenous analgesia (PCIA) can significantly reduce the incidence of postoperative nausea, an opioid-related adverse reaction, compared to sufentanil PCIA in patients undergoing cerebellopontine angle (CPA) region surgery. A secondary objective is to compare the postoperative analgesic effects between the two drugs. The study plans to enroll 174 patients (with a calculated sample size of 164 plus 5% for attrition). The primary outcome is the incidence of nausea within 6-48 hours postoperatively. Secondary outcomes include pain scores at rest and during movement within 48 hours, and other exploratory outcomes such as vomiting incidence, time to first flatus/defecation, and gastrointestinal function scores.

Preemptive Analgesia in Laparoscopic Hysterectomy

The aim of this study is to evaluate the effects of ibuprofen and paracetamol administered for pre-emptive analgesia to patients undergoing laparoscopic hysterectomy on pain scores during the first 24 hours postoperatively, the amount of opioids consumed postoperatively, and adverse effects such as postoperative nausea and vomiting.

Comparison of Pain Relief Methods for Hip Surgery: A Study on Two Different Nerve Block Techniques

This prospective randomized comparative study aims to compare the analgesic efficacy of pericapsular nerve group block (PENG) and lumbar erector spinae plane block (L-ESP) groups to relieve postoperative pain in participants over the age of 18 undergoing total hip arthroplasty under spinal anesthesia. The main question it aims to answer is: To demonstrate whether PENG block or L-ESP block is more effective in postoperative analgesia in patients undergoing total hip arthroplasty surgery based on pain scores, opioid consumption, and patient satisfaction. Total hip arthroplasties cause severe pain with movement in the postoperative period. After surgery, the movements of the participants are severely restricted, which increases the possibility of complications. In this study, the participants' pain status, VAS score, opioid consumption through patient-controlled analgesia, and patient satisfaction will be measured with a questionnaire for 24 hours at predetermined time points and then compared. Both types of blocks have pain-relieving effects. This study will only investigate which one is more effective in reducing pain, and there will be no deficiency in relieving the pain of the participants.

Adding Dexmedetomidine or Clonidine to Spinal Anesthesia for Cesarean Delivery

This study will examine whether addition of dexmedetomidine or clonidine (two alpha-2 adrenergic agonists) will improve the comfort of patients during spinal anesthesia for cesarean delivery. When added to standard spinal anesthesia consisting of bupivacaine (a local anesthetic) and fentanyl and morphine (two opioids), these medications may decrease some of the pulling/tugging/pressure sensations that patients sometimes feel during cesarean delivery, may prolong the anesthetic time, and may decrease postoperative pain.