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CompletedNCT06086483Updated Oct 17, 2023

Pain Management After Adductor Canal Block for Total Knee Arthroplasty

A Phase 4 interventional study of Ropivacaine 0.2% Injectable Solution and 0.9%sodium chloride in Knee Osteoarthritis, Knee Arthritis and Knee Arthropathy, sponsored by Poznan University of Medical Sciences. Completed at 1 site in Poland. Open to participants aged 18 Years to 100 Years. Per ClinicalTrials.gov, last updated 2023-10-17.

Sponsored by Poznan University of Medical Sciences · Phase 4, Interventional, and Treatment

From the registry’s dates

  • Registered 3 years 3 months after the study started (first participant enrolled Jun 2020, registered Oct 2023).
Phase
Phase 4
Study type
Interventional
Enrollment
361
Allocation
Randomized
Ages
18 Years to 100 Years
Sex
All
01

Study summary

This randomized, double-blinded, placebo-controlled trial sought to evaluate the efficacy of the iPACK block with Adductor Canal Block on postoperative pain, functional recovery and NLR and PLR levels.

Read the detailed description

The Interspace between the popliteal artery and capsule of the posterior knee, or iPACK block, together with the Adductor Canal block (ACB), has been described and shows promise in providing analgesia to the knee joint. However, the effect of these two blocks on postoperative pain levels, functional recovery, and stress response is uncertain. This study compares a preoperative iPACK and ACB block to Sham blocks before total knee arthroplasty under spinal anesthesia.

02

Conditions studied

  • Knee Osteoarthritis
  • Knee Arthritis
  • Knee Arthropathy
  • Knee Pain Chronic

Keywords

  • iPACK
  • Adductor Canal Block
  • pain management
  • multimodal analgesia
  • peripheral nerve block
  • knee arthroplasty
03

In context

Osteoarthritis, Knee

3,391 studies on the registry are indexed under Osteoarthritis, Knee; 628 are open to participants now.

This study's enrollment of 361 is above the median of 69 across 2,808 interventional studies indexed under Osteoarthritis, Knee.

Browse Osteoarthritis, Knee studies →

Lead sponsor

Poznan University of Medical Sciences is the lead sponsor of 147 studies on the registry; 45 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 100 Years
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Patients > 18 years old undergoing unilateral total knee arthroplasty

Exclusion criteria

Exclusion Criteria:

  • refusal to participate
  • \< 18 yo
  • Chronic opioid use
  • localized infection
05

Study design

Phase
Phase 4
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Triple (Participant, Care provider, Investigator)
Enrollment
361 participants (actual)

Study arms

  • Active comparator
    iPACK block+ABC block

    Patients received a preoperative ultrasound-guided iPACK block with 20 mL of 0.25% ropivacaine and an Adductor Canal block with 20mL 0.25% ropivacaine.

    Drug: Ropivacaine 0.2% Injectable Solution

  • Active comparator
    Sham blocks

    Patients received a preoperative ultrasound-guided iPACK block with 20 mL of 0.9% normal saline and an Adductor Canal block with 20mL 0.9% normal saline.

    Drug: 0.9%sodium chloride

Interventions

  • 20 mL 0.5% ropivacaine was injected into the PENG block 20 mL 0.5% ropivacaine was injected into the Adductor Canal block

    Also known as: Ropimol

  • 20 mL 0.9% sodium chloride was injected into the PENG block 20 mL 0.5% sodium chloride was injected into the Adductor Canal block

    Also known as: normal saline

06

What researchers measure

Primary outcomes

  1. postoperative Numeric Pain Rating Scale

    Numeric Pain Rating Scale. The 11-point numeric scale ranges from '0' representing one pain extreme (e.g. "no pain") to '10' representing the other pain extreme (e.g. "pain as bad as you can imagine" or "worst pain imaginable")

    Time frame: 24 hours after surgery

  2. postoperative Numeric Pain Rating Scale et rest

    Numeric Pain Rating Scale. The 11-point numeric scale ranges from '0' representing one pain extreme (e.g. "no pain") to '10' representing the other pain extreme (e.g. "pain as bad as you can imagine" or "worst pain imaginable")

    Time frame: 48 hours after surgery

  3. postoperative Numeric Pain Rating Scale et rest

    Numeric Pain Rating Scale. The 11-point numeric scale ranges from '0' representing one pain extreme (e.g. "no pain") to '10' representing the other pain extreme (e.g. "pain as bad as you can imagine" or "worst pain imaginable")

    Time frame: 72 hours after surgery

  4. postoperative Numeric Pain Rating Scale et rest

    Numeric Pain Rating Scale. The 11-point numeric scale ranges from '0' representing one pain extreme (e.g. "no pain") to '10' representing the other pain extreme (e.g. "pain as bad as you can imagine" or "worst pain imaginable")

    Time frame: 96 hours after surgery

  5. postoperative Numeric Pain Rating Scale during active flexion

    Numeric Pain Rating Scale. The 11-point numeric scale ranges from '0' representing one pain extreme (e.g. "no pain") to '10' representing the other pain extreme (e.g. "pain as bad as you can imagine" or "worst pain imaginable")

    Time frame: 48 hours after surgery

  6. postoperative Numeric Pain Rating Scale during active flexion

    Numeric Pain Rating Scale. The 11-point numeric scale ranges from '0' representing one pain extreme (e.g. "no pain") to '10' representing the other pain extreme (e.g. "pain as bad as you can imagine" or "worst pain imaginable")

    Time frame: 72 hours after surgery

  7. postoperative Numeric Pain Rating Scale during active flexion

    Numeric Pain Rating Scale. The 11-point numeric scale ranges from '0' representing one pain extreme (e.g. "no pain") to '10' representing the other pain extreme (e.g. "pain as bad as you can imagine" or "worst pain imaginable")

    Time frame: 96 hours after surgery

Secondary outcomes

  1. Postoperative opioid consumption

    milligrams of intravenous morphine equivalents

    Time frame: 96 hours after surgery

  2. Neutrophil-to-lymphocyte ratio

    Neutrophil-to-lymphocyte ratio

    Time frame: 12 hours after surgery

  3. Neutrophil-to-lymphocyte ratio

    Neutrophil-to-lymphocyte ratio

    Time frame: 24 hours after surgery

  4. Platelet-to-lymphocyte ratio

    Platelet-to-lymphocyte ratio

    Time frame: 12 hours after surgery

  5. Platelet-to-lymphocyte ratio

    Platelet-to-lymphocyte ratio

    Time frame: 24 hours after surgery

  6. Time to first opioid administration

    Hours to first administration of an intravenous opioid drug

    Time frame: 96 hours postoperatively

07

Study locations

1 site
  • Poznan University of Medical Sciences
    Poznan, Poznań 61-701, Poland
08

References and documents

Individual participant data

Plan to share: Yes — The data presented in this study are available on request from the corresponding author.

Supporting information: Study protocol, Statistical analysis plan, Informed consent form, Clinical study report, Analytic code

Time frame: December 2024

Access criteria: The data presented in this study are available on request from the corresponding author.

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Oct 17, 2023, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT06086483
Responsible party
Sponsor
First posted
Oct 17, 2023
Start date
Jun 18, 2020
Primary completion
Jul 20, 2022
Completion
Aug 24, 2023
Last update
Oct 17, 2023

Study contacts

Zbigniew Żaba, Ph.D.
study chair · Department of Emergency Medicine Clinic
Malgorzata Domagalska, Ph.D.
principal investigator · Department of Palliative Medicine, University of Medical Sciences, Poznań, Poland

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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Studies of the drugs tested here: Ropivacaine · Sodium Chloride

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