Condition category
Musculoskeletal Diseases
Date applied
Date assigned
Last edited
Prospectively registered
Overall trial status
Recruitment status
No longer recruiting
Publication status

Plain English Summary

Background and study aims
Due to changes in working regulations, today’s trainee surgeons will have had far fewer hours of experience in the operating theatre by the time they become consultants than in the past. There has been a change in the training culture in the modern NHS and it is rightly now considered unacceptable to allow young surgeons to ‘practice’ (perform) operations for the first time on real patients. The government has urged that there is a need to look at additional ways of training surgeons that provide realistic yet safe training. This will help to ensure that future orthopaedic (bone and joint) surgeons are trained to the highest possible standard to perform safe operations for their patients. One way of overcoming this problem is by using simulated surgery. Much in the same way as pilots learn to fly aeroplanes using a flight simulator before doing it for real, surgeons can first learn to do operations using simulation. One of the most promising simulation opportunities for learning surgery is found in using donated dead human bodies (cadavers). This is a very valuable learning resource for young surgeons as cadavers have the correct arrangement of all parts of the body that is found in the living patient, and it replicates the experience of surgery in an accurate and sophisticated way. A recent change in the law has allowed human cadavers to be used for training surgeons in the UK for the first time in history. It is not yet known whether this type of training will help young surgeons to learn operations more quickly and to a higher standard. The aim of this study is to see whether there are any benefits to the learning curve of the trainee surgeons.

Who can participate?
Junior surgeons in their fourth and fifth years of clinical practice after medical school, on a training programme in the West Midlands area

What does the study involve?
Participants are randomly allocated into one of two groups. One group attends a cadaveric simulation training course in September 2014. The other group attends the exact same course in July 2015. Between September 2014 and July 2015, all participants in both groups have their performance measured during certain operations they perform on real patients during the year. As during this time period some of the participants have received the training (the September group) and some have not yet (the July group), the research team is able to see what effect, if any, the new type of training has had on the participants’ real-life operations.

What are the possible benefits and risks of participating?
This study offers three major potential benefits for arthritis patients:
1. Young surgeons could learn to do arthritis surgery using cadaveric simulation and achieve a high level of skill before operating on live patients
2. More experienced surgeons-in-training learn to perform increasingly complex operations
for arthritis such as joint replacement surgery. There are many surgeon-related factors that can affect the outcome of these operations. Key skills could be learnt using cadaveric simulation, therefore helping to ensure the best outcome for the patients.
3. This research will also help develop tools for assessing surgeons' technical skill and could, with further work in the future, be used to help assess if surgeons are competent to proceed to the next stage of their training.
There are no risks to patients from their surgeons participating in this study. The training cannot make them ‘worse’ surgeons. The surgeons themselves will need to make a time commitment to attend the training course, and will be asked to complete some additional assessments during the year, in addition to those which are already a standard feature of training. We also need to talk to the surgeons who are taking part to find out about their view and experiences of the new training.

Where is the study run from?
University Hospital Coventry & Warwickshire, West Midlands Surgical Training Centre, Warwick Medical School (UK)

When is the study starting and how long is it expected to run for?
September 2014 to August 2015

Who is funding the study?
1. Arthritis Research UK
2. Health Education West Midlands (UK)

Who is the main contact?
Dr Hannah James

Trial website

Contact information



Primary contact

Dr Hannah James


Contact details

Clinical Sciences Research Laboratories
University Hospitals Coventry & Warwickshire
Clifford Bridge Road
United Kingdom

Additional identifiers

EudraCT number number

Protocol/serial number

Arthritis Research UK Grant reference number 20485

Study information

Scientific title

Does learning to perform surgery on cadavers lead to better surgeons and safer patients?


cad:trauma study

Study hypothesis

The study hypothesis is that provision of a cadaveric simulation training (CST) course to junior orthopaedic surgeons-in-training will improve their real world operative performance.

The following objectives will be addressed in the study:
1. Measurement of the early surgical skill acquisition trajectory of CST-trained and standard-trained participants using an objective, validated outcome measure
2. Characterize skill retention and transfer to ‘live’ surgery following a CST intervention
3. Determine trainee and trainers’ perspectives on the experience of CST

Ethics approval

1. University of Warwick's Biomedical and Scientific Research Ethics Committee, 29/05/2014, ref. REGO-2014-718
2. National research ethics approval (15/WM/0464) (added 28/01/2020)
3. Confidentiality Advisory Group approval (16/CAG/0125) (added 28/01/2020)

Study design

Randomised multi-centre controlled 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 participant information sheet


Education and training of surgeons


Participants will be randomised to two groups:

The CST intervention is a two-day course and will take place on 25/09/2014 at the West Midlands Surgical Training Centre (WMSTC) at the University Hospital Coventry & Warwickshire. Faculty and participants will be briefed on the study at the start of the day.
Demographic data on participants and their subjective skills rating will be measured at the beginning of the day using a surgical self-efficacy questionnaire. Participant performance of the taught procedures during the course will be assessed by the supervising faculty surgeons, using both the Objective Structured Assessment of Technical Skills in Surgery (OSATS) and the Generic Operative Supervised Learning Event (GOSLE) measures. All participants will also have Procedure Based Assessments (PBAs) completed for each procedure, which is standard current educational practice.

Control group: Self-efficacy questionnaires (SEQs) will be administered to the control participants on 25/09/2014. Control participants and their trainers will be briefed about the study outcome measures at this time (OSATS/GOSLE/PBA), and from the 25/09/14 onwards they will be asked to complete these during every live surgical procedure they perform.

After the training intervention, participants in the intervention group will disperse to their respective host hospitals and continue to be exposed to a variety of trauma surgery as per standard training.

Intervention type



Not Applicable

Drug names

Primary outcome measure

1. Objective Structured Assessment of Technical Skill in Surgery (OSATS). This is a validated tool for assessing technical skill in surgeons. It is completed by a senior surgeon immediately after supervising a trainee performing a procedure. It is generic to all operations and assesses learners across six domains; respect for tissue, time and motion, knowledge and instrument handling, flow of operation, use of assistants and knowledge of this procedure. Each domain is scored on a Likert scale of one to five, with one being the worst and five the best.
2. Generic Operative Supervised Learning Event (GOSLE). This is a new tool developed for assessing technical skill in Trauma & Orthopaedic surgeons, which is undergoing validation (which this trial will contribute towards). The GOSLE is similarly generic to all surgical procedures and completed by a senior surgeon immediately after supervising a trainee. The GOSLE measures the percentage of the procedure performed (in 5% increments), description of the steps performed by the trainee and a global rating assessment of their performance on this occasion. The global rating is on an eight-point scale with attached descriptors and guidance notes, ranging from ‘able to assist, with guidance’ to ‘able to anticipate, avoid and/or resolve common problems'.
3. Procedure Based Assessment (PBA). This is the current gold standard tool used for assessing surgeons-in-training performance. It is procedure-specific, thus the fields on the assessment are different between procedures. The PBA consists of a checklist tool against which performance is scored for different steps of the operation as on ‘not observed’, ‘unsatisfactory’ or ‘satisfactory’. The checklist is different for each procedure. There is a global rating scale assessment ranging from zero – ‘insufficient evidence to support a summary judgment’, to four – ‘competent to perform the procedure unsupervised (could deal with complications that arose)’. There is also space for reflective comments to be made by both the trainer and trainee.

Both the intervention and control group participants will be instructed to arrange completion of the study outcome assessment measures at every subsequent index case they perform on a real patient during the study follow-up period. All outcome data will be collected centrally on the trial website and will be accessed centrally to anonymise and extract it for analysis.

Secondary outcome measures

Surgical self-efficacy questionnaire (SEQ) scores. Participants in the intervention group will be assessed at baseline during the cadaveric simulation training course (25-26th September 2014). Participants in both the intervention and control courses will be assessed during the September 2014-August 2015 training year on each occasion that they perform one of the index study procedures (dynamic hip screw fixation of a femoral neck fracture, hemi-arthroplasty for femoral neck fracture, open reduction-internal fixation of an ankle fracture and lower limb compartment releases). The precise timing of these measurements will vary due to the irregular nature of trauma surgery.

Overall trial start date


Overall trial end date


Reason abandoned (if study stopped)


Participant inclusion criteria

Trainee Trauma & Orthopaedic Surgeons in the West Midlands Area who are in their fourth ('Core Training Year 2') or fifth ('Speciality Training Year 3') post-graduate year of clinical practice

Participant type


Age group




Target number of participants


Participant exclusion criteria

Refusal of consent

Recruitment start date


Recruitment end date



Countries of recruitment

United Kingdom

Trial participating centre

University Hospitals Coventry & Warwickshire
United Kingdom

Sponsor information


Arthritis Research UK (UK)

Sponsor details

Copeman House
St Mary's Gate
S41 7TD
United Kingdom

Sponsor type




Funder type


Funder name

Arthritis Research UK; Grant Number 20485

Alternative name(s)

Funding Body Type

private sector organisation

Funding Body Subtype

Other non-profit organizations


United Kingdom

Funder name

Health Education West Midlands (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

2020 protocol in (added 28/09/2020)

Publication citations

Additional files

Editorial Notes

28/09/2020: Publication reference added. 28/01/2020: The following changes were made to the trial record: 1. Ethics approval 2 and 3 were added to the ethics approval field. 2. The overall end date was changed from 04/08/2015 to 31/07/2020. 14/09/2017: No publications found, verifying study status with principal investigator.