Muscular DiseasesRIMMASNCT03354767
The Role of Ischaemia-reperfusion Injury in the Pathogenesis of Muscle Wasting After Thoracic Aortic Surgery
An observational study of Muscular Diseases, run by Imperial College London.
Trial summary
Single-centre observational study over one year investigating the mechanisms of muscle homeostasis in patients with acute skeletal muscle atrophy following major aortic surgery Read more about this study
- Who is it for?
- Ages 18 years and olderHealthy volunteers can take part
- Conditions the study is for
- Muscular Diseases
- What is being tested?
- Aortic and aortic valve surgery
- Type of treatment
- Surgery or procedure
- How many people
- 40 participants
- Where
- No sites listed yet
- Study dates
- Nov 2013to Aug 2015
- Phase
- Observational
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Study population: All patients undergoing major aortic or aortic valve surgery requiring cardiopulmonary bypass and aortic cross-clamping
Who may be able to join
- All adult (>18) patients undergoing major aortic or aortic valve surgery
Who cannot join
- Pre-existing cause for neuromuscular weakness or severe wasting (such as previous stroke, neuromuscular disease or malignancy)
About this study
Official title: 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
Read the 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.
- Conditions
- Muscular Diseases
- Being tested
- Aortic and aortic valve surgery
- Medical subject headings
- Muscular Diseases
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Aortic and aortic valve surgeryProcedure or surgery
| Study group | Role | What they receive |
|---|---|---|
| Wasting patients | Patients with >10% loss of skeletal muscle one week after major aortic surgery Receives: Procedure: Aortic and aortic valve surgery | |
| Non-wasting patients | Patients with <10% loss of skeletal muscle one week after major aortic surgery Receives: Procedure: Aortic and aortic valve surgery |
What is being measured
The primary outcome is the main question the study is designed to answer.
Change in Rectus Femoris muscle cross-sectional area (%)
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
Measured: 7 days
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted28 Nov 2017
- Study startNov 2013
- Primary completionOct 2014
- Study completionAug 2015
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Muscular DiseasesStudies of the same condition, open and under way.
- More trials run by Imperial College LondonThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Cohort
- Time perspective
- Prospective
- Enrolment
- 40 participants (actual)
Sponsor and investigators
- Lead sponsor
- Imperial College London
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT03354767
- Sponsor's protocol ID
- ImperialC
- Acronym
- RIMMAS
- Status last verified
- Apr 2013
- First submitted
- 11 Nov 2016
- Last updated
- 28 Nov 2017
- Results posted
- No
- Individual data sharing
- No
Study at a glance
From the registry record, last updated by the sponsor on 28 Nov 2017. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Observational Study Into the Effect on Muscle Wasting and Multiple Organ Function of Ischaemia-reperfusion Injury After Major Aortic Surgery
- ClinicalTrials.gov ID
- NCT03354767
- Acronym / sponsor ID
- RIMMAS / ImperialC
- Conditions
- Muscular Diseases
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 40 participants (actual)
- Lead sponsor
- Imperial College LondonUniversity, hospital or other
- Study start
- Nov 2013
- Primary completion
- Oct 2014 (actual)
- Study completion
- Aug 2015 (actual)
- First posted
- 28 Nov 2017 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Single-centre observational study over one year investigating the mechanisms of muscle homeostasis in patients with acute skeletal muscle atrophy following major aortic surgery
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 design
- Observational model
- Cohort
- Time perspective
- Prospective
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Wasting patients | – | Procedure: Aortic and aortic valve surgeryPatients with >10% loss of skeletal muscle one week after major aortic surgery |
| Non-wasting patients | – | Procedure: Aortic and aortic valve surgeryPatients with <10% loss of skeletal muscle one week after major aortic surgery |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
- Study population
- All patients undergoing major aortic or aortic valve surgery requiring cardiopulmonary bypass and aortic cross-clamping
Key inclusion criteria (1 listed)
- All adult (>18) patients undergoing major aortic or aortic valve surgery
Key exclusion criteria (1 listed)
- Pre-existing cause for neuromuscular weakness or severe wasting (such as previous stroke, neuromuscular disease or malignancy)
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Aortic and aortic valve surgery | Procedure or surgery | Non-wasting patients, Wasting patients |
Primary outcome
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
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 28 Nov 2017.
- Individual participant dataSharing planned: No
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
Questions about this trial
What is this clinical trial studying?
An observational study of Muscular Diseases, run by Imperial College London.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 1 inclusion and 1 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 28 Nov 2017. Status can change between updates, so confirm with the study contact before making plans.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Change in Rectus Femoris muscle cross-sectional area (%) (time frame: 7 days). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 28 Nov 2017; AzTrials last refreshed its copy on 8 Nov 2026.