The Role of Ischaemia-reperfusion Injury in the Pathogenesis of Muscle Wasting After Thoracic Aortic Surgery (RIMMAS)

November 20, 2017 updated by: Imperial College London

Observational Study Into the Effect on Muscle Wasting and Multiple Organ Function of Ischaemia-reperfusion Injury After Major Aortic Surgery

Single-centre observational study over one year investigating the mechanisms of muscle homeostasis in patients with acute skeletal muscle atrophy following major aortic surgery

Study Overview

Status

Completed

Conditions

Detailed Description

Some patients who are critically ill develop a syndrome of muscle weakness called Intensive Care Unit Acquired Paresis. This syndrome involves the development of severe muscle wasting and weakness and affects all skeletal muscles including the muscles which help one breathe. Muscle wasting and weakness whilst critically ill cause prolongation of mechanical ventilation, longer stays on the ICU, reduced mobility and prolonged rehabilitation in survivors. It has also been shown to increase the risk of death on ICU, due to an inability to wean patients from mechanical ventilation. Most patients recover; however in some, the effects last for many years and patients may not recover fully.

Although there is some understanding of why this syndrome develops, the molecular processes underlying the muscle wasting are not well understood. From the current scientific evidence, the investigators have identified a group or family of proteins believed to be important in the development of this condition, the activity of which are regulated by disease processes thought to lead to Intensive Care Unit Acquired Paresis (e.g. infection, inflammation, oxidative stress, immobility).

This research aims to investigate the role of these proteins in human tissue from patients who are at risk of Intensive Care Unit Acquired paresis. Even patients who do not go on to develop the full syndrome, in the early stages of ICU care, show some signs of muscle changes and loss of strength.

Study Type

Observational

Enrollment (Actual)

40

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Sampling Method

Probability Sample

Study Population

All patients undergoing major aortic or aortic valve surgery requiring cardiopulmonary bypass and aortic cross-clamping

Description

Inclusion Criteria:

  • All adult (>18) patients undergoing major aortic or aortic valve surgery

Exclusion Criteria:

  • Pre-existing cause for neuromuscular weakness or severe wasting (such as previous stroke, neuromuscular disease or malignancy)

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
Wasting patients
Patients with >10% loss of skeletal muscle one week after major aortic surgery
Non-wasting patients
Patients with <10% loss of skeletal muscle one week after major aortic surgery

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Change in Rectus Femoris muscle cross-sectional area (%)
Time Frame: 7 days
Percentage change in cross sectional area of Rectus Femoris muscle (cm2) in the first post-operative week, from pre-operative measurement (measured the day before surgery), repeated on day 7 post-operatively
7 days

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

November 1, 2013

Primary Completion (Actual)

October 1, 2014

Study Completion (Actual)

August 1, 2015

Study Registration Dates

First Submitted

November 11, 2016

First Submitted That Met QC Criteria

November 20, 2017

First Posted (Actual)

November 28, 2017

Study Record Updates

Last Update Posted (Actual)

November 28, 2017

Last Update Submitted That Met QC Criteria

November 20, 2017

Last Verified

April 1, 2013

More Information

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

Clinical Trials on Muscular Diseases

Clinical Trials on Aortic and aortic valve surgery

3
Subscribe