Condition category
Circulatory System
Date applied
20/01/2016
Date assigned
20/01/2016
Last edited
09/03/2016
Prospective/Retrospective
Prospectively registered
Overall trial status
Ongoing
Recruitment status
Recruiting

Plain English Summary

Background and study aims
Congenital heart disease (CHD) is the general term used to describe a range of birth defects that affect the heart. The majority of children born with a congenital heart defect (CHD) now live into adulthood. Many of them need repeated operations throughout life to replace the valves on the right side of the heart (pulmonary valves). The standard operation for valve replacement involves opening the chest so that the heart is accessible to the surgeon and the use of the heart lung machine to take over the function of the heart and lungs (pumping blood and oxygen through the body) during the operation. It has been found however, that repeated use of the heart lung machine is associated with complications, such as excessive bleeding, heart damage, stroke, and even death, and so it is preferable to avoid using them if possible. In recent years, new types of “injectable” self-expanding artificial valves have been developed for pulmonary valve replacement (PVR) procedures. They have been developed so they can be “injected” into position with the heart still beating (avoiding the need to use the heart lung machine) and without a need for the surgeon to fully expose the heart. The aim of this study is to find out if using injectable valves leads to a quicker recovery and shorter stay in hospital, saving money for the NHS, and whether they work as well as standard valves.

Who can participate?
Patients aged between 12 and 80 who are having a PVR procedure.

What does the study involve?
Participants are randomly allocated to one of two groups. Participants in the first group have the conventional PVR procedure, involving opening the chest to replace the affected valve, while using the heart lung machine to keep the patient alive during the operation. Participants in the second group have a PVR procedure using an injectable self-expanding valve is used. This involves the replacement valve being placed in the correct position through a small incision (cut). The length of time that the participants stayed in hospital after their operation is recorded for all participants.

What are the possible benefits and risks of participating?
Not provided at time of registration

Where is the study run from?
Clinical Trials and Evaluation Unit, Bristol Royal Infirmary (UK)

When is the study starting and how long is it expected to run for?
February 2016 to February 2018

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

Who is the main contact?
Miss Rachel Heys

Trial website

Contact information

Type

Public

Primary contact

Miss Rachel Heys

ORCID ID

Contact details

Clinical Trials and Evaluation Unit
Level 7
Bristol Royal Infirmary
Upper Maudlin Street
Bristol
BS2 8HW
United Kingdom

Additional identifiers

EudraCT number

ClinicalTrials.gov number

Protocol/serial number

20472

Study information

Scientific title

The effectiveness on post-­operative recovery of using ‘off pump’ self­-expanding tissue valves versus ‘on pump’ conventional tissue valves for pulmonary valve replacement: An early phase randomised controlled trial

Acronym

INVITE

Study hypothesis

The aim of this study is to determine whether the use of injectable valves results in quicker recovery and shorter stay in hospital and is cost­-saving for the NHS, and whether these valves function as well as the conventional ones.

Ethics approval

NRES Committee South West – Exeter, 16/11/2015, ref: 15/SW/0179

Study design

Randomised; Interventional; Design type: Treatment

Primary study design

Interventional

Secondary study design

Randomised controlled trial

Trial setting

Other

Trial type

Treatment

Patient information sheet

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

Condition

Topic: Children, Cardiovascular disease; Subtopic: All Diagnoses, Cardiovascular (all Subtopics); Disease: All Diseases, Congenital Heart Disease and Pulmonary Hypertension

Intervention

Eligible patients requiring PVR who give written informed consent to participate, will be randomised in a 1:1 ratio. Randomisation will be carried out using an internet-based system.

Group 1:: Participants receive an injectable pulmonary (BioPulmonic™, Biointegral Surgical Inc.) tissue valve inserted through a median sternotomy, without CPB.

Group 2: Participants receive a standard pulmonary stented tissue valve inserted through a median sternotomy with CPB.

Apart from the use of the intervention (IPVR) the patient care pathway will be as standard care.

Participants will be blinded to their treatment allocation until their participation in the trial has ended. The success of blinding will be monitored during each participant’s follow up, and instances of unblinding will be recorded. Patients will be followed up for 6 months.

Intervention type

Other

Phase

Drug names

Primary outcome measures

Chest drainage in the first 24 post-operative hours.

Secondary outcome measures

1. Post-operative time-to-‘readiness for extubation’. The criteria below will be documented at the time of extubation (when all criteria should be met): normal temperature, cardiovascular system stable, no metabolic imbalance, blood loss decreasing and below a defined rate, able to clear respiratory secretions, patient awake, no residual muscle paralysis and adequate analgesia.
2. Length of ICU stay
3. Inotropic/vasodilator support
4. Chest drain volume in the first 0-12 hours
5. Blood products used in the first 24 hours
6. FFD, defined as all of: normal temperature, pulse and respiration, normal oxygen saturation on air, normal bowel function, physically mobile
7. Cardiac MRI assessment of valve and heart function at 6 months, defined as: presence and degree of pulmonary regurgitation, end-diastolic volume and right ventricular ejection fraction
8. Echocardiography assessment of valve function at routine follow-up at 6 months, defined as presence and degree of pulmonary regurgitation and residual valve stenosis, measured as peak velocity through the valve
9. Health-related quality of life is measured using the EuroQol EQ-5D (or EQ-5D-Y in patients <18 years), SF36 (in patients >18 years) and child health questionnaire (CHQ, in patients <18 years) at 6 weeks, 6 months
10. Valve-related complications during follow-up

Overall trial start date

01/06/2014

Overall trial end date

01/07/2020

Reason abandoned

Eligibility

Participant inclusion criteria

1. Patients undergoing either:
1.1. Pulmonary valve replacement (PVR) or
1.2. Pulmonary valve replacement (PVR) with PFO closure that would not require CPB if using an injectable valve or
1.3. Pulmonary valve replacement (PVR) with RVOT reconstruction that does not require CPB if using an injectable valve
2. Patients aged 12-­80 years old inclusive, with an adult valve size (25­31mm)

Participant type

Patient

Age group

Mixed

Gender

Both

Target number of participants

Planned Sample Size: 60; UK Sample Size: 60

Participant exclusion criteria

1. Prisoners and adults lacking capacity to consent
2. Patients aged 12 to 15 years old under the care of social services
3. Patients with pulmonary valve or artery stenosis requiring patch reconstruction of the pulmonary arteries using CPB
4. Patients having an intra-­cardiac shunt that would require CPB despite using an injectable valve
5. Patients having a RVOT reconstruction that would require CPB despite using an injectable valve
6. Patients requiring other anatomical heart corrections that would require CPB despite using an injectable valve
7. Patients who are unwilling to undergo surgery involving a porcine product
8. Patients unable to provide assent/consent

Recruitment start date

01/02/2016

Recruitment end date

01/02/2018

Locations

Countries of recruitment

United Kingdom

Trial participating centre

Bristol Royal Infirmary
Clinical Trials and Evaluation Unit Level 7 Upper Maudlin Street
Bristol
BS2 8HW
United Kingdom

Sponsor information

Organisation

University of Bristol

Sponsor details

Clinical Trials and Evaluation Unit Bristol
School of Clinical Sciences
Level 7 Queens Building
Bristol Royal Infirmary
Bristol
BS2 8HW
United Kingdom

Sponsor type

University/education

Website

Funders

Funder type

Government

Funder name

National Institute for Health Research

Alternative name(s)

NIHR

Funding Body Type

government organisation

Funding Body Subtype

Federal/National Government

Location

United Kingdom

Results and Publications

Publication and dissemination plan

1. Planned presentation of study results at international meetings
2. Planned publication in peer reviewed publications
3. Planned dissemination through patient organisations and newsletters to patients, where available

Intention to publish date

01/07/2021

Participant level data

Not provided at time of registration

Results - basic reporting

Publication summary

Publication citations

Additional files

Editorial Notes

09/03/2016: Verified study information with principal investigator.