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NCT Number: NCT04400708

Single-injection Adductor Canal Block for Total Knee Arthroplasty Under Spinal Anesthesia

This study evaluates the effect of the single-injection adductor canal block in patients receiving total knee arthroplasty under spinal anesthesia.

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Key information

Conditions

Total Knee Arthroplasty

Age range

19 year–80 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Seoul National University Hospital

Seoul, 110-744, South Korea

About this study

This study aims to evaluate the effect of the single-injection adductor canal block in patients receiving total knee arthroplasty under spinal anesthesia. The effect of the single-injection adductor canal and continuous adductor canal block in patients receiving total knee arthroplasty under general anesthesia has been well established. However, due to the residual effect of spinal anesthesia, the effect of the single-injection adductor canal block needs to be determined. The investigators hypothesize that the single-injection adductor canal block will decrease the total sum of 2h, 6h, 12h, and 24h pain score.

Who can participate

Healthy volunteers accepted: Yes

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

Inclusion criteria

  • adult patients receiving total-knee arthroplasty under spinal anesthesia
  • ASA class 1-3

Exclusion criteria

  • infection at the needle injection site
  • hard for pain evaluation
  • CRPS patient with lower extremity symptom
  • chronic opioid user
  • those with side effect to local anesthetics
  • those getting revision total-knee arthroplasty or with the previous operation at the same knee area
  • those getting the surgery under general anesthesia due to the failed spinal anesthesia

Treatment and study plan

Adductor canal block

Procedure

After the end of the surgery, at the arrival of PACU, the patient's leg is prepared and draped in a sterile manner. Assisted by the high-frequency linear ultrasound transducer, we target the mid-thigh level and the 22-gauge/8cm needle is introduced in plain through the sartorius muscle. the correct position for the tip of the needle in the adductor canal is checked and a bolus injection of 0.5% ropivacaine 15ml is given.

Control Group

Procedure

After the end of the surgery, at the arrival of PACU, the patient's leg is prepared and draped in a sterile manner. Assisted by the high-frequency linear ultrasound transducer, we target the mid-thigh level and the 22-gauge/8cm needle is introduced in plain through the sartorius muscle. the correct position for the tip of the needle in the adductor canal is checked and a bolus injection of normal saline15ml is given.

Primary outcomes

  1. the sum of pain score

    Time frame: 2 hours, 6 hours, 12 hours, and 24 hours after intervention

    VAS pain score (0 to 10) is measured using numeric pain rating scale at 2 hours, 6 hours, 12 hours, and 24 hours 0: no pain, 10: worst pain

Secondary outcomes

  1. Postoperative nausea and vomiting

    Time frame: 2 hours, 6 hours, 12 hours, and 24 hours after intervention

    degree of postoperative nausea and vomiting (0 to 3) 0: no nausea, no vomiting, 1: nausea present, but no vomiting, 2: nausea present, vomiting once, 3: vomiting repeatedly within 30 minutes.

  2. Postoperative opioid consumption

    Time frame: 2 hours, 6 hours, 12 hours, and 24 hours intervention

    amount of postoperative opioid consumption based on oral morphine equivalent daily dose

Sponsors and collaborators

Lead sponsor

Seoul National University Hospital

Other

Registry information

Official study title

The Effect of Postoperative Single-injection Adductor Canal Block for Multimodal Pain Control in Patients Receiving Total Knee Arthroplasty Under Spinal Anesthesia

Important dates

Study start
2020
Primary completion
2021
Study completion
2021
First posted
May 22, 2020
Registry last updated
Nov 24, 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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