Condition category
Date applied
Date assigned
Last edited
Retrospectively registered
Overall trial status
Recruitment status
No longer recruiting
Publication status
Results overdue

Plain English Summary

Background and study aims
The aim of this study is to help us better understand the ways in which we can manage pain in patients who have had a knee replacement. There are various methods of pain relief; all of these treatments have been shown to work well. Currently, the treatment depends on the surgeons’ preference. This project will compare two methods of pain relief to see if patients experience less pain and are more mobile, with one method above another.

Who can participate?
Any patient due to undergo a total knee replacement at the Lancashire Teaching Hospital

What does the study involve?
Patients will be randomly put into one of the two groups, and each group will receive a different method of pain relief to cover the period following the operation. One group will be given a femoral nerve block, which is a type of local anaesthetic which ‘numbs’ the area of the thigh and knee. This will involve an Anesthetist giving an injection into the nerve, which lies in the upper part of the leg. The other group will receive an injection that contains pain relieving drugs into the joint itself at the time of surgery. This will be done by the surgeon. All participants will be asked to report their pain scores at various intervals, so that these can be recorded. Other information which will be documented will include:
The amount of the pain relieving medication used after the operation.
The time it takes to work through physiotherapy goals.
The time it takes to recover in hospital after the operation.

What are the possible benefits and risks of participating?
We cannot promise that patients will gain any immediate benefit from taking part in the research. However, the information gathered will help improve the care of patients who have knee replacements in the future. There are no major risks associated with this research study. The risks of having knee replacement surgery will have been discussed with you by the surgeon.

Where is the study run from?
Lancashire Teaching Hospital (UK)

When is the study starting and how long is it expected to run for?
May 2012 to July 2012

Who is funding the study?
Lancashire Teaching Hospitals NHS Foundation Trust (UK)

Who is the main contact?
Mr George McLauchlan

Trial website

Contact information



Primary contact

Mr George McLauchlan


Contact details

Lancashire Teaching Hospitals NHS Foundation Trust
Royal Preston Hospital
Sharoe Green Lane
United Kingdom
+44 (0)1772 522 479

Additional identifiers

EudraCT number number

Protocol/serial number


Study information

Scientific title

Post operative pain relief following knee arthroplasty - an exploratory study comparing the efficacy of a single shot femoral nerve block against intra-articular analgesic injection


Study hypothesis

The two methods of pain relief being compared are femoral nerve blocks, which cause numbing of the thigh and knee, versus the use of injections which contain drugs used for pain relief into the knee joint.

To measure which method is more effective, we will be measuring the following:
1. The pain scores of patients
2. The amount of patient-controlled pain relief used
3. The time taken to achieve physiotherapy goals.
4. The length of stay in hospital

Ethics approval

NRES Committee Northwest – Preston, 15/03/2012, ref: 12/NW/0153

Study design

Randomised control trial

Primary study design


Secondary study design

Randomised controlled trial

Trial setting


Trial type


Patient information sheet

Not available in web format, please use the contact details to request a patient information sheet


Knee arthroplasty


Randomised control trial looking at single shot femoral nerve blocks versus Intra articular injections. The data will be analysed using stats direct and MS Excel.

Prior to surgery, patients will be randomly allocated to either group A or group B. Group A will receive a one shot femoral nerve block containing 30ml or 0.2% ropivacaine post surgery.

Group B will receive a single intra articular knee injection containing 200ml 0.2% ropivacaine, 1ml 1:1000 adrenaline and 30mg ketolorac.

Intervention type



Not Applicable

Drug names

Primary outcome measure

Pain scores in the two patient groups, recorded 4 hours post operatively, before and after physiotherapy

Secondary outcome measures

1. The amount of patient-controlled pain relief used
2. The time taken to achieve physiotherapy goals
3. The length of stay in hospital

Overall trial start date


Overall trial end date


Reason abandoned (if study stopped)


Participant inclusion criteria

Patients having a total knee arthroplasty between the dates of May 2012- July 2012 who have capacity to consent

Participant type


Age group




Target number of participants


Participant exclusion criteria

1. Any patients that lack capacity to consent to the study
2. Patients who are unwilling to consent.
3. Patients who may be acutely confused or suffer from dementia
4. Patients who have a known allergy, intolerance or previous reaction to any of the drugs being administered

Recruitment start date


Recruitment end date



Countries of recruitment

United Kingdom

Trial participating centre

Lancashire Teaching Hospitals NHS Foundation Trust
United Kingdom

Sponsor information


Lancashire Teaching Hospitals NHS Foundation Trust (UK)

Sponsor details

Royal Preston Hospital
Sharoe Green Lane
United Kingdom

Sponsor type

Hospital/treatment centre



Funder type

Hospital/treatment centre

Funder name

Lancashire Teaching Hospitals NHS Foundation Trust (UK)

Alternative name(s)

Funding Body Type

Funding Body Subtype


Results and Publications

Publication and dissemination plan

Not provided at time of registration

Intention to publish date

Participant level data

Not provided at time of registration

Basic results (scientific)

Publication list

2013 results in:

Publication citations

Additional files

Editorial Notes

14/02/2019: Publication reference added. 12/02/2018: No publications found, verifying study status with principal investigator.