- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT01991288
Analgesic Efficacy of Saphenous Nerve Block in Total Knee Replacement
Does Saphenous Nerve Block Improve Analgesia After Total Knee Replacement When Used in Combination With Local Infiltration Analgesia? A Prospective Randomised Double Blinded Trial.
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Introduction:
Local infiltration analgesia (LIA) is considered acceptable after total knee replacements (TKR) in terms of analgesia, ease of performance, early mobilization and early hospital discharge . Continuous femoral nerve block has been used to enhance post op pain relief (POPR) for TKR but at the expense of motor blockade . A Sub sartorial approach to saphenous nerve block (SNB) spares the motor block . To date the role of saphenous nerve block for POPR in TKR has not been evaluated.
Methodology:
In order to test this hypothesis, we proposed to carry out a prospective randomized controlled double blinded (surgeon and assessor) trial study. With institutional ethics approval and having obtained written informed consent from each patient, 20 ASA 1 - 3 patients scheduled to undergo TKR under spinal anesthesia +/- sedation were allocated to one of two groups i.e. Group (SNB): patients receiving SNB sub sartorial approach and Group (NSNB): patients not receiving SNB.
Group allocation was determined using computer generated random number tables. Sealed envelopes were opened on the day of the surgery by the attending anesthetist responsible for the care of the recruited patient.
Postoperative period:
Patients were then assessed for pain at rest and on movement on arrival in recovery and then at 6 , 12 and 24 hrs. Visual analogue scale on a 10 cm straight line was used to assess postoperative pain scores as predictive value of post operative analgesia on rest and movement i.e passive flexion of knee to 30 degree . Patients were assessed for any motor block by using maximum tolerable range of active knee flexion (MKF) and maximum range of straight leg raise(MSLR) on arrival in recovery and at 6, 12 and 24 hrs. All patients received regular paracetamol 1g 6 hourly, diclofenac 75 mg 12 hourly, oxycontin 10-20 mg ( depending on age) 12 hourly and oxynorm 10 mg as rescue analgesia.
Study Type
Enrollment (Actual)
Phase
- Phase 4
Contacts and Locations
Study Locations
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Cork, Ireland, 0000
- Dept. of Anaesthesia & Intensive Care Unit, Cork University Hospital
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
American Society of Anaesthesia (ASA) Grade I-lll patients Undergoing elective Total Knee Arthroplasty Patients able to consent and understand all the components of the study.
Exclusion Criteria:
Demented patients Patients having bilateral Knee Replacements Patients unable to comprehend the use of pain scales Allergy to any of the medications used in the study Renal dysfunction Coagulation disorders Peptic ulcer disease precluding use of non-steroidal anti-inflammatory drugs (NSAIDs) Patients unable to use regular opioid medication Any chronic pain condition other than osteoarthritis of the knee.
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: Double
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
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Experimental: SNB Saphenous Nerve block
Patients received SNB preoperatively at mid thigh level with ultrasound guidance.
10 mls 0.5% bupivacaine was administered for nerve block by the anesthetist.
All patients also received peri operative Local Infiltration Analgesia by the surgeon.
All patients will receive preoperative oxycontin, peri operative paracetamol and diclofenac.
Post operatively all patients received regular paracetamol 1g 6 hourly, Diclofenac sodium 12 hourly and oxycontin 10-20 mg 12 hourly.
All patients received standardized spinal block by the same anesthetist, post nerve block for surgery.
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Patients in group SNB received an ultrasound guided SNB (a sub sartorial approach) by a single operator with 10 mls 0.5% bupivacaine.
At the end of surgery periarticular knee infiltration of 30 mls 0.5% levobupivacaine + 70 mls 0.9% saline + 0.5 mg adrenaline was performed in a staged fashion by the surgeon, beginning with infiltration of the deep structures on tibial surface at 1mm depth around all exposed tissues, medial and lateral collateral ligament origin, all cut surfaces of extensor mechanism, all cut surface of skin and subcutaneous tissue
Other Names:
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Active Comparator: NSNB Non Saphenous Nerve Block
Patients only received Local Infiltration Analgesia.
As per protocol all patients received the same pre, peri and post operative analgesia as described in the experimental group.
All patients had a standardized spinal block for surgery.
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All patients at the end of surgery received periarticular knee infiltration of 30 mls 0.5% levobupivacaine + 70 mls 0.9% saline + 0.5 mg adrenaline, in a staged fashion by the surgeon, beginning with infiltration of the deep structures on tibial surface at 1mm depth around all exposed tissues, medial and lateral collateral ligament origin, all cut surfaces of extensor mechanism, all cut surface of skin and subcutaneous tissue
Other Names:
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
Pain on movement at 24 hours time point post operatively
Time Frame: 24 hours hours time point
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24 hours hours time point
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Secondary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
pain on movement at 6 and 12 hour time point
Time Frame: 6 and 12 hours time points
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6 and 12 hours time points
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pain at rest at 6, 12 and 24 hours time points
Time Frame: 6, 12 and 24 hours time points
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6, 12 and 24 hours time points
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Maximum Knee Flexion at 6, 12 and 24 hours time points
Time Frame: 6, 12 and 24 hours time points
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6, 12 and 24 hours time points
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Maximum Straight Leg Raise Test at 6, 12 and 24 hours time points
Time Frame: 6, 12 and 24 hours time points
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6, 12 and 24 hours time points
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Time to First request for rescue analgesia
Time Frame: 24 hours
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24 hours
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Cumulative Opioid consumption in 24 hours
Time Frame: 24 hours
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24 hours
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Cumulative opioid consumption till discharge
Time Frame: till discharge time
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till discharge time
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6 Minute walk test
Time Frame: At 24 hours Post block Conduction
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At 24 hours Post block Conduction
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Other Outcome Measures
Outcome Measure |
Time Frame |
---|---|
Time to discharge from hospital
Time Frame: 1 week
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1 week
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Collaborators and Investigators
Sponsor
Investigators
- Study Director: George Shorten, FFARCSI, PhD, Dept. of Anaesthesia & ICU, Cork University Hospital, Cork, Ireland
Study record dates
Study Major Dates
Study Start
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Estimate)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
- Pathologic Processes
- Postoperative Complications
- Pain
- Neurologic Manifestations
- Pain, Postoperative
- Physiological Effects of Drugs
- Adrenergic Agents
- Neurotransmitter Agents
- Molecular Mechanisms of Pharmacological Action
- Central Nervous System Depressants
- Autonomic Agents
- Peripheral Nervous System Agents
- Sensory System Agents
- Anesthetics
- Adrenergic alpha-Agonists
- Adrenergic Agonists
- Anesthetics, Local
- Bronchodilator Agents
- Anti-Asthmatic Agents
- Respiratory System Agents
- Adrenergic beta-Agonists
- Sympathomimetics
- Vasoconstrictor Agents
- Mydriatics
- Bupivacaine
- Levobupivacaine
- Epinephrine
- Racepinephrine
- Epinephryl borate
Other Study ID Numbers
- JR-0786-GI
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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