Proximal Versus Distal Adductor Canal Blocks for Total Knee Arthroplasty

A Comparison of Proximal Versus Distal Continuous Adductor Canal Blocks After Total Knee Arthroplasty

Status

Completed

Phases

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT02701114

Enrollment

Registered

2016-03-08

Start date

2016-02-29

Completion date

2016-11-30

Last updated

2017-07-13

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Post-Operative Pain

Brief summary

This study is designed to evaluate pain control of continuous adductor canal blocks placed proximally versus distally within the canal. The investigators hypothesize that there will be similar pain control between both groups.

Detailed description

This study is a non-inferiority trial designed to determine whether placement of a continuous block within the adductor canal has a substantial impact on pain following total knee arthroplasty. Our primary outcome to determine this difference will be opioid consumption within the first day following surgery. Secondary outcomes will include: pain scores, quadriceps strength, and distance ambulated during physical therapy.

Interventions

PROCEDUREProximal Adductor Canal Block

Continuous Nerve Block

PROCEDUREDistal Adductor Canal Block

Continuous Nerve Block

Study design

Allocation

RANDOMIZED

Intervention model

PARALLEL

Primary purpose

TREATMENT

Masking

DOUBLE (Subject, Outcomes Assessor)

Eligibility

Sex/Gender

ALL

Age

18 Years to No maximum

Healthy volunteers

Inclusion criteria

* Unilateral Total Knee Arthroplasty * ASA physical status I-III * \>18 years old * Non-pregnant * Consent to participate in the study

Exclusion criteria

* Refusal to participate * \<18 years old * Chronic opioid use * Localized infection Pregnancy Pre-existing coagulopathy Allergy to ultrasound gel or local anesthetics Contraindication to or refusal of spinal anesthetic

Design outcomes

Primary

Measure	Time frame	Description
Opioid Consumption (IV Morphine Equivalents)	24 Hours	Total opioid consumption

Secondary

Measure	Time frame	Description
Opioid Consumption (IV Morphine Equivalents)	48 Hours	Total opioid consumption
Pain (Numeric Rating)	48 Hours	NRS Pain Scale
Quadriceps Strength (% of Baseline)	48 Hours	Maximum Isometric Voluntary Contraction
Distance Ambulated (Feet)	48 Hours	Total distance ambulated during physical therapy

Countries

United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 25, 2026