Condition category
Urological and Genital Diseases
Date applied
Date assigned
Last edited
Prospectively registered
Overall trial status
Recruitment status
No longer recruiting

Plain English Summary

Background and study aims
The prostate gland sits at the exit of the bladder like a collar so when it enlarges it can be difficult, or even impossible, to pass urine, which can cause men significant problems and result in hospital admissions. 25,000 men each year have an operation to relieve this problem, making it one of the most common operations performed in the NHS. Transurethral resection of the prostate (TURP) is the standard operation and is generally a very successful procedure, although it does have some complications. Various laser procedures have been tried as their use leads to less blood loss and a faster return home. However, they have not become widely used, either because they have been difficult to do or because the results were not as good as TURP. We now have the opportunity to use a new type of laser called thulium which cuts and vaporises the prostate and has shown promising results in a small study.

Who can participate?
Men who are fit to have prostate surgery for either bothersome lower urinary tract symptoms (LUTS) or urinary retention, secondary to benign prostatic obstruction (BPO).

What does the study involve?
Men who need a prostate operation are randomly allocated to either have the thulium operation or TURP. We want to know if the thulium operation is as good as TURP, including whether patients benefit by having less bleeding and going home earlier, and if the cost of the operation is less. We expect that most patients will have the operation as a day case and not stay overnight at the hospital. The success of the two procedures will be mainly judged by a simple symptom questionnaire completed by men and measurement of the speed at which patients pass urine before and after surgery.

What are the possible benefits and risks of participating?
There may be no direct benefit to men who take part, but they will be helping with this research enabling doctors to assess which operation is best and safest. The men will receive considerably more post-operative follow-up than is available routinely and this should ensure that men receive optimum care. The benefit to men, the NHS and society is that at the end of the trial, it will be known which operation is most cost-effective. The risks are that they may have a less effective operation, but any operation carries a risk, and it is not known which of the two procedures is more effective or more risky.

Where is the study run from?
This study is run from North Bristol NHS Trust in collaboration with the clinical trials unit at the University of Bristol, UK. There will be six centres across the UK participating in the trial. Urology departments in the following centres: North Bristol NHS Trust (lead centre), The Newcastle Upon Tyne Hospitals NHS Foundation Trust, NHS Grampian, Great Western Hospital NHS Foundation Trust, Royal United Hospital Bath NHS Trust, Gloucestershire Hospitals NHS Foundation Trust

When is the study starting and how long is it expected to run for?
Recruitment will start in early 2014 and the study will end in December 2017

Who is funding the study?
National Institute for Health Research, Health Technology Assessment (UK)

Who is the main contact?
The co-ordinating trial office - Bristol Randomised Trials Collaboration (BRTC)

Trial website

Contact information



Primary contact

Mr Hashim Hashim


Contact details

Bristol Urological Institute
Southmead Hospital
BS10 5NB
United Kingdom

Additional identifiers

EudraCT number number

Protocol/serial number

HTA 12/35/15

Study information

Scientific title

A randomised controlled trial to determine the clinical and cost effectiveness of thulium laser transurethral vaporesection of the prostate (ThuVARP) versus transurethral resection of the prostate (TURP) in the National Health Service (NHS)



Study hypothesis

The key aim of this research is to determine whether thulium laser transurethral vaporesection of the prostate (ThuVARP) is equivalent to transurethral resection of the prostate (TURP) in men with benign prostatic obstruction (BPO) treated within the NHS, judged on a patient reported symptom severity score (IPSS) and the maximum urine flow rate (Qmax).

Ethics approval

National Research Ethics Service (NRES) Committee South West - Frenchay, 15/01/2014

Study design

Randomised controlled parallel-group 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


Bothersome voiding lower urinary tract symptoms, or urinary retention, secondary to benign prostatic obstruction


ThuVARP versus TURP in men with BPO.

The trial compares conventional TURP, the current gold standard, to the new laser technique of ThuVARP. All eligible men referred for consideration of BPO surgery will be identified by the consultant, dedicated research nurse or designated team member at clinics in each centre. The consultant/research nurse will introduce the study to the patients and if interest is expressed, provide further details of the study by means of the Patient Information Sheet. All men who enter the study will complete baseline questionnaires, including measurement of urinary and sexual symptoms, a urinary bladder diary and a flow test. Men who consent will be randomised to either having a TURP or ThuVARP. All consenting men will complete the follow-up questionnaires and diaries at 6 weeks by post, and at 3 and 12 months in the clinic. At 12 months they will also have a review appointment with their urologist and research nurse to evaluate the results of surgery including a maximum flow rate (Qmax) and an international prostate symptom score (IPSS), and to identify any problems or the need for other treatment.

Intervention type



Drug names

Primary outcome measure

Clinical effectiveness of ThuVARP and TURP in improving patient reported lower urinary tract symptoms (LUTS) as measured by the IPSS patient reported questionnaire and the objective measure of Qmax, 12 months after surgery.

Secondary outcome measures

All patient reported outcomes (PROs) will be recorded at baseline, 6 weeks (by post), 3 months and 12 months.

1. What is the cost-effectiveness of ThuVARP as compared to TURP in terms of the two primary outcomes and quality-adjusted-life-years (QALYs)? Measured using EQ-5D-5L (preference based general quality of life measure)
2. What is the comparative impact of each treatment on patient-reported LUTS, erectile function, quality of life and general health at 6 weeks after randomisation/surgery, 3 months and 12 months? Measured using the ICIQ-MLUTS (for symptom bother), International Index of Erectile Function (IIEF), ICIQ-MLUTSsex (measures of erectile function), ICIQ-LUTSqol (condition specific quality of life score), EQ-5D-5L (preference based general quality of life measure) and ICIQ-Satisfaction (measures satisfaction with surgery outcomes) to assess the full impact of the intervention on patients and the NHS.
3. What is the comparative satisfaction of men with each type of surgery? Measured using ICIQ-Satisfaction (measures satisfaction with surgery outcomes) to assess the full impact of the intervention on patients and the NHS.
4. What is the comparative effectiveness of these operations in men who present with LUTS as opposed to urinary retention? Measured using the ICIQ-MLUTS (for symptom bother), International Index of Erectile Function (IIEF), ICIQ-MLUTSsex (measures of erectile function) and ICIQ-LUTSqol (condition specific quality of life score)?
5. What are men’s experiences of both procedures, including those presenting with LUTS or urinary retention?

Added 08/12/2017: Additional secondary outcomes:
1. Surgical complications is measured using Clavien-Dindo classification to 12 months post surgery
2. Length of hospital stay is measured using medical notes
3. Blood transfusion rate is measured using medical notes to 12 months post surgery
3. Post-operative catheterisation time is measured using medical notes
4. Haemoglobin (blood loss during surgery) is measured using blood tests pre and post operatively
5. Serum sodium (absorption of irrigation fluid) is measured using blood tests pre and post operatively
6. Post-void residual urine is measured using urinary flow tests at 12 months post surgery

Overall trial start date


Overall trial end date


Reason abandoned (if study stopped)


Participant inclusion criteria

Adult men over the age of 18 suitable for TURP, either in urinary retention or with bothersome lower urinary tract symptoms (LUTS), secondary to BPO.

Participant type


Age group




Target number of participants


Participant exclusion criteria

Patients with:
1. Neurogenic lower urinary tract dysfunction (LUTS)
2. Prostate cancer
3. Previous prostate or urethral surgery
Added 08/12/2017:
4. A PSA outside of the normal age-related range and who have not had prostate cancer excluded
5. Men who are unable to give informed consent or complete trial documentation

Recruitment start date


Recruitment end date



Countries of recruitment

United Kingdom

Trial participating centre

Bristol Urological Institute
BS10 5NB
United Kingdom

Sponsor information


North Bristol NHS Trust (UK)

Sponsor details

Trust Headquarters
Beckspool Road
BS16 1JE
United Kingdom

Sponsor type

Hospital/treatment centre



Funder type


Funder name

Health Technology Assessment Programme

Alternative name(s)

NIHR Health Technology Assessment Programme, HTA

Funding Body Type

government organisation

Funding Body Subtype

Federal/National Government


United Kingdom

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

2017 protocol in:

Publication citations

Additional files

Editorial Notes

08/12/2017: The overall trial dates have been updated from 01/10/2013-30/09/2016 to 01/01/2014-31/12/2017. The recruitment dates have been updated from 01/06/2014-30/09/2016 to 05/06/2014-31/12/2016. The ethics approval has been updated. The outcome measures have been updated. The exclusion criteria has been updated. 18/04/2017: Publication reference added.