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NCT Number: NCT05960422

Popliteal Sciatic Nerve Block and Adductor Canal Block

The goal of this observational study is to determine the effect of adding adductor canal block to popliteal sciatic nerve block on patient-surgeon satisfaction, intraoperative sedation need, tourniquet pain, return time of motor block, and postoperative pain in patients undergoing hallux valgus correction surgery. The main question it aims to answer are:

* Does peroperative pain decrease? * Do patient-surgeon satisfaction increase? The patients were divided into two groups, the Popliteal Sciatic Block (PSB) group, and the Popliteal Sciatic Block + Adductor Canal Block (PSB + ACB) group.

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Key information

Conditions

Popliteal Sciatic Nerve Block Adductor Canal Block

Age range

18 year–80 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Istanbul Medeniyet University Faculty of Medicine Department of Anesthesiology and Reanimation

Istanbul, Kadikoy, 34720, Turkey (Türkiye)

About this study

Patients were randomly assigned into 2 groups as popliteal sciatic nerve block (Group PSB), popliteal sciatic nerve + adductor canal block (Group PSB + ACB). In this study, 52 patients scheduled for hallux valgus correction operations, in the American Society of Anesthesiologists I-III groups, between the ages of 18-80, were enrolled. Study was planned as a prospective, randomized and controlled trial. All patients were perfomed PSB with 10 ml 0.5% bupivacaine and 10 ml 2% prilocaine in the prone position, using ultrasonography and nerve stimulator. 10 ml of 0.5% bupivacaine and 10 ml of 2% prilocaine were administered to the patients in the ACB + PSB group in the supine position, in addition to PSB. Patients with coagulopathy, infection at the region site of regional blockade, allergy of local anesthetic drugs, peripheral neuropathy and neurogenic disorders affecting the lower extremities, peripheral artery disease, mental retardation and those who did not give consent to study were excluded. All patients were sedated with 1-2 mg midazolam and 50 µg fentanyl. After the blocks were performed , sensory -motor block onset time, surgery-tourniquet time, tourniquet pain, motor block time, pain onset time, first analgesic administration time (NPRS≥4) and analgesic administered were recorded. Anesthesiologists evaluating these data were blinded to group distribution .

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Patients aged between 18 and 80
  • American Society of Anesthesiologists ASA I-III

Exclusion criteria

  • Patients with coagulopathy
  • Patient with wounds or infections in the region
  • Patient with allergies to local anesthetic drugs
  • Patient with significantly impaired peripheral neuropathy and neurogenic disorders affecting the lower extremity
  • Patient with peripheral arterial disease
  • Patient with mental retardation

Treatment and study plan

Popliteal Sciatic nerve block

Procedure

Patients undergoing popliteal sciatic block, the side where the procedure would be performed in the prone position was sterilized after appropriate antisepsis. After visualizing the popliteal artery in the popliteal fossa with the probe it was advanced proximally in a horizontal and minimally lateral position to determine the point of separation of the tibial and peroneal nerves from the sciatic nerve. Subcutaneous local anesthesia was applied at this point after the skin, and the stimulator needle was advanced towards the sciatic nerve in an in-plane approach, passing through the skin and subcutaneous tissue, and then the nerve stimulator was opened up to 1 mA. After observing motor movement in the foot, the stimulator was reduced to 0.3-0.5 mA, and after observing motor movements for duration of 0.1 ms, 10 ml of 0.5% bupivacaine + 10 ml of 2% prilocaine were administered to the target tissue

Adductor canal block

Procedure

Patients in the group undergoing popliteal sciatic block + adductor canal block, with the extremity to be blocked slightly externally rotated, the anterior part of the thigh was prepared with the necessary antiseptic procedures while the patient was in the supine position. Using an ultrasound probe, the femoral artery was visualized by advancing the ultrasound probe distally, and the saphenous nerve was identified just lateral to the femoral artery, beneath the sartorius muscle. At the junction of the sartorius muscle and vastus medialis, 10 ml of 0.5% bupivacaine + 10 ml of 2% prilocaine were applied to the periphery of the saphenous nerve. Subsequently, the patient was turned prone, and a popliteal sciatic block was performed.

Primary outcomes

  1. Postoperative Pain

    Time frame: Postoperative 24 hours

    The Numeric Pain Rating Scale (NPRS). Between 1-10. The low values mean low pain and a better outcome.

Sponsors and collaborators

Lead sponsor

Istanbul Medeniyet University

Other

Registry information

Official study title

Effects of Adding Adductor Canal Block to Popliteal Sciatic Nerve Block in Hallux Valgus Correction Operations

Important dates

Study start
2021
Primary completion
2022
Study completion
2022
First posted
Jul 25, 2023
Registry last updated
Aug 1, 2023

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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