Effect of Exercise on Patients With Claudication Undergoing Surgery

Status Recruiting

Clinical Trial Summary

Title: How does exercise improve the calf muscle in patients with poor blood supply to their leg?

Purpose of the project: Patients with peripheral arterial disease have a poor blood supply to their lower leg. The reduced inflow prevents the leg from utilising nutrients and oxygen as easily as a healthy leg would. This causes pain when walking (intermittent claudication), which often occurs after a reproducible distance e.g. every 50 yards. These patients have a reduction in their quality of life as they feel embarrassed in social situations e.g. walking around town requires multiple breaks, so they tend to avoid this and isolate themselves more.

One treatment for claudication is exercising until the pain comes on; which most are reluctant to do. Walking up to three times a week for an hour, can double most people's walking distances, but doesn't always. The reason why some improve with exercise and others do not remains unknown.

This project will be the first randomised controlled trial of exercise in claudicants that focuses on the adaptations that occur in the muscle at a cellular level. We wish to compare muscle cells from a group that have exercised and group that have not. We will focus on the change in muscle cell size and function at present, and later progress to why and how this happens.

Methods: We will take measurements at the start of the study (baseline), after 6 weeks and then 3, 6 and 12 months. These measurements will be of a patient's fitness, actual walking distances and blood samples. At the time of surgery, muscle from the calf will be taken from the affected leg. This will be processed at the University's biomedical science department to look at the different types of muscle fibre and how efficiently they are working.

Clinical Trial Description

n/a

Study Design

Allocation: Randomized, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Treatment

Related Conditions & MeSH terms

Clinical Trial Details

NCT number	NCT01980602
Study type	Interventional
Source	University of Hull
Contact	Romesh Sarvanandan, MBBS MRCS
Phone	01482674643
Email	romesh1985@doctors.org.uk
Status	Recruiting
Phase	N/A
Start date	March 2011

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Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.

Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.