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Knee DiseaseNCT06084403

Ultrasound-Guided Adductor Canal Block for Total Knee Arthroplasty Surgery

A study testing 20 ml volume adductor canal block, 30 ml volume adductor canal block and 40 ml volume adductor canal block in people with Knee Disease and Knee Deformity, run by Bursa City Hospital at 1 site in Turkey (Türkiye).

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

The ultrasound-guided selective blockade of the saphenous nerve in the adductor canal provides effective analgesia and reduces postoperative pain in patients undergoing arthroscopic medial meniscectomy. Read more about this study

Who is it for?
Ages 18 to 65 years
Conditions the study is for
Knee Disease, Knee Deformity, Knee Pain Chronic
What is being tested?
20 ml volume adductor canal block, 30 ml volume adductor canal block and 40 ml volume adductor canal block
Type of treatment
Injection or infusion
Could I receive a placebo?
No, everyone receives an active treatment
How many people
90 participants
Where
1 siteTurkey (Türkiye)
Study dates
20 Dec 2023to 10 May 2024
Phase
Interventional
Are there results?
None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 to 65 years
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • American Society of Anesthesiologists (ASA) classification I-II-III
  • Scheduled for total knee arthroplasty under spinal anesthesia

Who cannot join

  • history of bleeding diathesis
  • receiving anticoagulant treatment,
  • known local anesthetics and opioid allergy,
  • infection of the skin at the site of the needle puncture,
  • pregnancy or lactation,
  • patients who do not accept the procedur

Trial locations and contacts

1 site in 1 country.

Turkey (Türkiye)1 site
  • Mürsel Ekinci

    Bursa

Other trials in Turkey (Türkiye)

About this study

Official title: The Efficacy of Different Volumes for Ultrasound-Guided Adductor Canal Block for Postoperative Analgesia Management After Total Knee Arthroplasty Surgery

The ultrasound-guided selective blockade of the saphenous nerve in the adductor canal provides effective analgesia and reduces postoperative pain in patients undergoing arthroscopic medial meniscectomy. Selective blockade of the saphenous nerve in the adductor canal provides effective analgesia without quadriceps muscle weakness. It has been shown that the adductor canal block (ACB) block increases the spread of local anesthetics in a distal and proximal way. Therefore, the proximal spread of local anesthetics may cause possible quadriceps weakness. The distal spread of local anesthetics may increase analgesic effect via sciatic nerve. The different volumes for ACB is a topic of discussion. The aim of this study is to compare the different volumes of US-guided ACB performing for postoperative analgesia management after total knee arthroplasty surgery.

Read the detailed description

Knee arthroplasty is one of the most common orthopedic procedures. Patients may complain severe pain due to the surgical trauma and the prosthesis. Opioid agents are commonly used for analgesia management. However, opioids have adverse effects such as nausea, vomiting, sedation and respiratory depression. Peripheral nerve blocks such as femoral block, adductor canal block (ACB) may be performed to reduce opioid consumption and opioid-related side effects.

Selective blockade of the saphenous nerve in the adductor canal for knee surgery provides effective analgesia without quadriceps muscle weakness. This is an important advantage of ACB since it there is no motor blockade in the postoperative period. Blocking of the motor branches leads to delaying of the mobilization and it increases the patient's falling risk. ACB, targets the saphenous nerve and the vastus medialis branch which are the two largest sensorial nerves of the femoral nerve that innervates the knee. ACB blocks the articular branches of the obturator nerve at the same time. Since the ACB is performed at the distal site of thigh it does not target majority of the efferent branches of the quadriceps muscle, therefore the strength of this muscle may not be affected. ACB is usually performed with a volume of 10-30 ml and studies may be needed including different volumes to understand its effectiveness.

The aim of this study is to compare the different volumes (20 ml, 30 ml, and 40 ml) of US-guided ACB for postoperative analgesia management after total knee arthroplasty. The primary aim is to compare postoperative opioid consumption and the secondary aim is to evaluate postoperative pain scores (VAS), motor blockage, the first mobilization time, and adverse effects related with opioids (allergic reaction, nausea, vomiting).

Being tested
20 ml volume adductor canal block, 30 ml volume adductor canal block, 40 ml volume adductor canal block
Keywords
Adductor Canal Block, Total Knee Arthroplasty, Postoperative Analgesia Management
Medical subject headings
Osteoarthritis, Knee

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • 20 ml volume adductor canal blockDrug

    ACB will be performed at the end of the surgery. After identifying the adductor canal, by using the in-plane technique, the probe will be placed at the mid-thigh, half the distance between the inguinal crease and the patella, for block location. The superficial femoral artery will be visualized dorsal to the sartorius muscle. Then, the probe will be removed to distally. At this level, the hyperechoic view of the saphenous nerve will be visualized lateral and anterior to the artery in the subsartorial region. 5 mL of saline will be injected to confirm the proper injection site, and then a dose of 0.25% bupivacaine (Buvasin %5 flakon) 20ml will be injected here.

  • 30 ml volume adductor canal blockDrug

    ACB will be performed at the end of the surgery. After identifying the adductor canal, by using the in-plane technique, the probe will be placed at the mid-thigh, half the distance between the inguinal crease and the patella, for block location. The superficial femoral artery will be visualized dorsal to the sartorius muscle. Then, the probe will be removed to distally. At this level, the hyperechoic view of the saphenous nerve will be visualized lateral and anterior to the artery in the subsartorial region. 5 mL of saline will be injected to confirm the proper injection site, and then a dose of 0.25% bupivacaine(Buvasin %5 flakon) 30ml will be injected here.

  • 40 ml volume adductor canal blockDrug

    ACB will be performed at the end of the surgery. After identifying the adductor canal, by using the in-plane technique, the probe will be placed at the mid-thigh, half the distance between the inguinal crease and the patella, for block location. The superficial femoral artery will be visualized dorsal to the sartorius muscle. Then, the probe will be removed to distally. At this level, the hyperechoic view of the saphenous nerve will be visualized lateral and anterior to the artery in the subsartorial region. 5 mL of saline will be injected to confirm the proper injection site, and then a dose of 0.25% bupivacaine(Buvasin %5 flakon) 40ml will be injected here.

Study groups in NCT06084403
Study groupRoleWhat they receive
20 ml volume adductor canal blockActive comparatorACB will be performed at the end of the surgery. Patients will be administered tenoxicam (Tilcotil 20 mg flakon) 20 mg IV every 12 hours in the postoperative period. A patient controlled device prepared with 5 mg/ ml tramadol (100 mg-Contramal ® ampul) will be attached to all patients with a protocol included 10 mg bolus without infusion dose, 20 min lockout time and 4 hour limit. If the VAS score will be ≥ 4, 0,5 mg/kg-1 meperidine (Aldolan ampul 100 mg/2 ml) IV will be administered.
Receives: Drug: 20 ml volume adductor canal block
30 ml volume adductor canal blockActive comparatorACB will be performed at the end of the surgery. Patients will be administered tenoxicam (Tilcotil 20 mg flakon) 20 mg IV every 12 hours in the postoperative period. A patient controlled device prepared with 5 mg/ ml tramadol (100 mg-Contramal ® ampul) will be attached to all patients with a protocol included 10 mg bolus without infusion dose, 20 min lockout time and 4 hour limit. If the VAS score will be ≥ 4, 0,5 mg/kg-1 meperidine (Aldolan ampul 100 mg/2 ml) IV will be administered.
Receives: Drug: 30 ml volume adductor canal block
40 ml volume adductor canal blockActive comparatorACB will be performed at the end of the surgery. Patients will be administered tenoxicam (Tilcotil 20 mg flakon) 20 mg IV every 12 hours in the postoperative period. A patient controlled device prepared with 5 mg/ ml tramadol (100 mg-Contramal ® ampul) will be attached to all patients with a protocol included 10 mg bolus without infusion dose, 20 min lockout time and 4 hour limit. If the VAS score will be ≥ 4, 0,5 mg/kg-1 meperidine (Aldolan ampul 100 mg/2 ml) IV will be administered.
Receives: Drug: 40 ml volume adductor canal block

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Opioid consumption

    The primary aim is to compare perioperative and postoperative opioid consumption.

    Opioid consumption will be recorded at the first 48 hours period postoperatively.

    (postoperative 0-8, 8-16, 16-24, 24-48 hours)

    Measured: Opioid consumption will be recorded at the first 48 hours period postoperatively

Secondary outcomes (1)
  1. Postoperative pain scores (Numerical rating scale) (0-meaning "no pain" to 10-meaning "worst pain imaginable")

    Postoperative 48 hours period. Patients' pain scores will be questioned at 0, 2, 4, 8, 16, 24 and 48 hours.

    Measured: Patients will be evaluated at the first 48 hours period postoperatively

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted16 Oct 2023
  2. Study start20 Dec 2023
  3. Primary completion20 Mar 2024
  4. Study completion10 May 2024

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase N/A
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Model description
There are threemodels for this study. 20 ml volume adductor canal block group, 30 ml volume adductor canal block group and 40 ml volume adductor canal block group
Masking
Double blind
Who is masked
Participant, Outcomes assessor
Enrolment
90 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT06084403
Sponsor's protocol ID
BursaCityH
Status last verified
Dec 2025
First submitted
30 Sep 2023
Last updated
19 Dec 2025
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No: We will not share IPD

Publications

  • Guven Kose S, Kose HC, Arslan G, Eler Cevik B, Tulgar S. Evaluation of ultrasound-guided adductor canal block with two different concentration of bupivacaine in arthroscopic knee surgery: A feasibility study. Int J Clin Pract. 2021 Nov;75(11):e14747. doi: 10.1111/ijcp.14747. Epub 2021 Sep 3.

    PubMed 34428334
  • Ekinci M, Ciftci B, Demiraran Y, Celik EC, Yayik M, Omur B, Kuyucu E, Atalay YO. A comparison of adductor canal block before and after thigh tourniquet during knee arthroscopy: a randomized, blinded study. Korean J Anesthesiol. 2021 Dec;74(6):514-521. doi: 10.4097/kja.21040. Epub 2021 May 13.

    PubMed 33984219
  • Frassanito L, Vergari A, Nestorini R, Cerulli G, Placella G, Pace V, Rossi M. Enhanced recovery after surgery (ERAS) in hip and knee replacement surgery: description of a multidisciplinary program to improve management of the patients undergoing major orthopedic surgery. Musculoskelet Surg. 2020 Apr;104(1):87-92. doi: 10.1007/s12306-019-00603-4. Epub 2019 May 3.

    PubMed 31054080
  • Ekinci M, Kaciroglu A, Dikici M, Yildiz Eglen M, Bayrak F, Aydogmus I, Celik EC, Ciftci B. Effects of ultrasound-guided adductor canal block at different volumes on postoperative analgesia management in patients undergoing total knee arthroplasty: a prospective clinical study. BMC Anesthesiol. 2025 Oct 20;25(1):510. doi: 10.1186/s12871-025-03383-6.

    PubMed 41116173

Questions about this trial

What is this clinical trial studying?

A study testing 20 ml volume adductor canal block, 30 ml volume adductor canal block and 40 ml volume adductor canal block in people with Knee Disease and Knee Deformity, run by Bursa City Hospital at 1 site in Turkey (Türkiye).

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 2 inclusion and 6 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 19 Dec 2025. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in Turkey (Türkiye). Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Opioid consumption (time frame: Opioid consumption will be recorded at the first 48 hours period postoperatively). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT06084403, which also lists 4 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 19 Dec 2025.

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