Plain English Summary
Background and study aims
A neck dissection is an operation to remove the glands in the neck either because they have cancer in them or they are at risk of cancer spreading to them. Complications after neck dissection can be a significant problem for patients and may affect their quality of life. Research on understanding the feelings of patients who have had head and neck cancer treatment has shown that avoiding complications is very important. Giving patients a substance that copies the blood clotting process, called Fibrin Sealant, may be able to protect them from complications. This is because this substance can seal areas of bleeding and stick the raw surfaces of the wound together, reducing the space for blood to collect in. Fibrin Sealants are natural products derived from the same human blood that is used for blood transfusions and are sprayed directly into the wound. Unfortunately, there is no high quality research that has been able to answer whether Fibrin Sealants can prevent complications after neck dissection. Therefore a clinical trial has been designed to help answer this important question. However, before this can be started a miniature version of the trial (pilot study) needs to be conducted to make sure it has been designed in the best possible way and improve the design of the future trial, which will find out whether or not Fibrin Sealants can really help avoid complications.
Who can participate?
Patients over 18 years old who are due to have a neck dissection
What does the study involve?
Participants are randomly allocated to either receive Fibrin Sealant during their surgery or have their surgery as normal without it. They are followed up for 6 weeks after the date of their surgery. This includes their hospital in-patient stay and two scheduled outpatient clinic appointments. Any unscheduled hospital visits within the 6 week period are also included.
What are the possible benefits and risks of participating?
Taking part in this study does not have an effect on the participants’ cancer treatment. They will not be restricted in taking any drugs they may need or in having any further treatment. There are no specific benefits to taking part other than the opportunity to take part in surgical research. The study has been designed to minimise extra tests and hospital visits so that participation is as easy as possible. Surgeons up and down the country are already using Fibrin Sealants but this is not based on high quality evidence. Participants will be helping to design a ‘full’ trial that is as effective and efficient as possible. It is hoped that the ‘full’ trial will answer whether or not Fibrin Sealants are beneficial to patients undergoing neck dissection surgery. Fibrin Sealants are considered to be very safe products and serious risks are very rare. The manufacturer reports the following potential risks:
1. Itchiness of the skin of the neck (between 1 – 10 patients out of a hundred). The doctor may treat this with antihistamines (allergy medicines) depending on how problematic this is.
2. Fluid collection under skin (less than 1 patient out of a hundred). Most fluid collections do not require treatment as the body will eventually absorb the fluid. If the fluid collection is large or problematic, the doctor may drain the fluid. This may be done by either drawing the fluid out using a syringe or formally opening the wound and letting the fluid out.
3. Severe allergic reaction (less than 1 patient out of a hundred). If participants develop a severe allergic reaction it will normally develop during or immediately after the surgery. If signs and symptoms of allergy are noted they will receive treatment as a matter of urgency.
4. If the surgeon holds the spray too close to the blood vessels in the neck, air may enter the blood vessel causing a serious complication known as an “air embolism”. Patients who get “air embolisms” are at increased risk of heart attacks, strokes and breathing problems. Fortunately this is very rare as there have only ever been 6 reported cases of life threatening “air embolism” out of many thousands of patients who have already been given Fibrin Sealants over the years. There have been no reported cases of “air embolism” from the type of Fibrin Sealant used (ARTISS, Baxter Healthcare Ltd). Every surgeon who uses the fibrin sealant in this study will be trained on how to avoid this complication.
5. Because the Fibrin Sealant is taken from human blood that is used in blood transfusions, there is a theoretical risk of catching a blood-borne virus (e.g. hepatitis or HIV). People who donate their blood are always carefully selected to minimise the risk of transmitting viruses. Also the Fibrin Sealant has been carefully checked and treated to prevent contamination with viruses. Despite these efforts, it cannot be guaranteed that the Fibrin Sealant is free of viruses. There have been no reported cases of patients catching viruses from Fibrin Sealants. In the very unlikely event that participants do catch a virus, they will be referred to a specialist for treatment.
Where is the study run from?
1. Aintree University Hospital (UK)
2. Queen Victoria Hospital (UK)
When is the study starting and how long is it expected to run for?
October 2017 to September 2020
Who is funding the study?
National Institute for Health Research (NIHR) (UK)
Who is the main contact?
Dr Andrew Schache
Dr Andrew Schache
Northwest Cancer Research Centre
University of Liverpool
200 London Road
Aintree University Hospitals NHS Foundation Trust
+44 (0)151 529 5283
DEFeND: Determining the effectiveness of Fibrin Sealants in reducing complications in patients undergoing lateral neck dissection: a randomised external pilot trial
A neck dissection is an operation to remove the glands in the neck either because they have cancer in them or they are at risk of cancer spreading to them. Complications after neck dissection are a significant problem for patients and may affect their quality of life. Research on understanding the feelings of patients who have had head and neck cancer, has shown that avoiding complications is very important to them.
We have found evidence that by giving patients a substance that copies the blood clotting process called Fibrin Sealant, we may be able to protect them from complications. This is because this substance can seal areas of bleeding and stick the raw surfaces of the wound together. Unfortunately, there is no high quality research that has been able to answer whether Fibrin Sealants can prevent complications after neck dissection. Therefore we have designed a clinical trial to help us answer this important question. However, before this can be started we need to conduct a miniature version of the trial to make sure it has been designed in the best possible way. The main questions we aim to answer are:
1. Can we recruit patients?
2. Do all aspects of the study design work well together?
3. How many patients do we need in the 'full' trial?
North West – Greater Manchester East Research Ethics Committee, 14/05/2018, ref: 234851
Randomised; Interventional; Design type: Treatment, Surgery
Primary study design
Secondary study design
Randomised controlled trial
Patient information sheet
See additional files
Specialty: Surgery, Primary sub-specialty: Other; UKCRC code/ Disease: Cancer/ Malignant neoplasms, stated or presumed to be primary, of lymphoid, haematopoietic and related tissues
Randomisation lists shall be produced by a statistician at the NWSTC prior to the recruitment of the first patient. Patients shall be randomised using a 1:1 ratio. Lists shall be produced based on the principle of randomly permuted blocks with random block sizes of 2 and 4. Patients will only be stratified according to the hospital in which they receive their treatment.
Participants will be randomised to either receive fibrin sealant during their surgery or have their surgery as normal without it:
Arm A: Neck dissection with ARTISS fibrin sealant and standard wound closure. Application of ARTISS fibrin sealant to the surgical wound in addition to “Standard of care”. “Standard of care” will include the establishment of a dry surgical field after performing the neck dissection using electrocautery &/or surgical ties &/or clips. The wound should then be irrigated with 100ml of Normal Saline and dried. Up to 2ml of ARTISS will be sprayed into the wound adhering to the manufacturer’s instructions and surgical protocol steps
Arm B: Neck dissection with standard wound closure. Arm B is the control arm and constitutes “standard of care” alone. This will include the establishment of a dry surgical field after performing the neck dissection using electrocautery and/or surgical ties and/or clips. Patients will have a surgical drain placed and the wound closed in the usual manner.
Patients will be followed up for 6 weeks after the date of their surgery. This will include their hospital in-patient stay and two scheduled out-patient clinic appointments. Any unscheduled hospital visits within the 6 week period will also be included.
Primary outcome measures
As this research is a 'pilot study' no formal primary outcome measure has been specified. The outcomes measures for this study can be divided into those that will inform the pilot study and those that will inform the future 'full' clinical trial.
1. Proportion of eligible patients recruited to the study, calculated as the screened to randomisation rate at 12 months at the end of the DEFeND study
2. Reasons for failure to screen potentially eligible patients. Qualitative data recorded as free text for every patient who was potentially eligible but was not screened recorded at screening
3. Recruitment rate measured as the number of patients randomised each month throughout the study for 12 months
4. Reasons for failure to randomise. Qualitative data recorded as free text for every patient who was recruited but not randomised recorded at baseline
5. Reasons for failure to reveal allocation at a specific time point during surgery. Qualitative data recorded as free text for every patient who was randomised but did not have their allocation revealed at the correct timepoint during surgery. This is recorded on the day of surgery
6. Fidelity of the blinding process (both patients and outcome assessors) as detected by blinding indices. This is assessed by asking the patient and research team members what the allocation for that particular patient when they exit the study at follow-up 2 (day 28 – 42) or premature discontinuation
7. Accuracy of data recording, summarised by the number of key data items with missing/incomplete data entries recorded per patient when they exit the study at follow-up 2 (day 28 – 42) or premature discontinuation
8. Number of patients lost to follow-up recorded at 12 months at the end of the DEFeND study
9. Protocol adherence, measured by the number of major/minor protocol deviations observed per patient when they exit the study at follow-up 2 (day 28 – 42) or premature discontinuation
10. The minimal clinically important difference (MCID) in clinical endpoints, determined by questioning recruited patients and recruiting clinicians. Qualitative data recorded as free text for every patient when they exit the study at follow-up 2 (day 28 – 42) or premature discontinuation
Secondary outcome measures
1. Surgical complications recorded using the Clavien-Dindo classification of surgical complications recorded every day of in-patient stay, follow-ups 1 and 2, any unscheduled follow-up and at premature discontinuation
2. Wound drainage volume (ml) recorded 2 – 3 times daily during inpatient stay while surgical drain is in situ
3. Time (hours) for wound drainage volume to reach a rate of <30ml/24hrs (<1.25ml/hr) from the end of surgery. Recorded during inpatient stay
4. Time (hours) to drain removal (as dictated by drainage volume) from end of surgery. Recorded during inpatient stay
5. Total wound drainage volume (ml) from the time of drain activation to drain removal. Recorded during inpatient stay
6. Time (hours) to be declared medically fit for hospital discharge and time (hours) to actual hospital discharge. Recorded during inpatient stay
7. Incremental cost-effectiveness ratio, calculated per patient when they exit the study at follow-up 2 (day 28 – 42) or premature discontinuation
8. Neck Dissection Impairment Index (NDII). This is a procedure specific validated patient reported outcome measure. Recorded at baseline and when they exit the study at follow-up 2 (day 28 – 42) or premature discontinuation
9. Daily patient reported pain score using Visual Analogue Scale (VAS) recorded at baseline, every day of in-patient stay, follow-ups 1 and 2, any unscheduled follow-up and at premature discontinuation
Overall trial start date
Overall trial end date
Participant inclusion criteria
1. Patients due to undergo lateral neck dissection
2. Neck dissection to include a minimum of 3 levels
3. Patients who have capacity to consent
Target number of participants
Planned Sample Size: 50; UK Sample Size: 50
Participant exclusion criteria
1. Known allergy to Aprotinin (an ingredient of Fibrin Sealants known to cause allergic reactions)
2. Pregnancy or breastfeeding
3. Age less than 18 years
4. Bilateral neck dissection
5. Previous exposure to Fibrin Sealant within the last 6 months
6. The patient has a cancer that requires complex reconstructive surgery
7. Allergy to dairy products
Recruitment start date
Recruitment end date
Countries of recruitment
Trial participating centre
Aintree University Hospital
Trial participating centre
Queen Victoria Hospital
University of Liverpool
c/o Mr Alex Astor
Head of Liverpool Joint Research Office
Research Support Office
2nd Floor Block D Waterhouse Building
3 Brownlow Street
+44 (0)151 794 8739
NIHR Trainees Co-ordinating Centre (TCC); Grant Codes: DRF-2017-10-117
Funding Body Type
Funding Body Subtype
Results and Publications
Publication and dissemination plan
Planned publication in a high-impact peer reviewed journal as well as a PhD thesis by 30/09/2021.
IPD sharing statement
The datasets generated and/or analysed during the current study during this study will be included in the subsequent results publication (including PhD thesis).
Intention to publish date
Participant level data
Results - basic reporting