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A Study on the Phenomenon of Remote Ischaemic Preconditioning in Patients With Peripheral Artery Disease

Peripheral Arterial Disease Clinical Trial

Official title:
A Study on the Phenomenon of Remote Ischaemic Preconditioning in Patients With Peripheral Artery Disease

Clinical Trial Summary

This study aims to evaluate whether remote ischemic preconditioning (RIPC) daily for 28 days reduces the symptoms of intermittent claudication in patients with peripheral artery disease (PAD). The study evaluates the effect of RIPC on patients' total walking distance (TWC), initial claudication distance (ICD), and time to relief of claudication (TRC). In addition, the trial investigates the effect of RIPC on different arterial functional characteristics and low molecular weight metabolites in serum and affected skeletal muscle.

Clinical Trial Description

A research hypothesis is that repeated remote ischemic preconditioning (RIPC) daily for 28 days reduces the symptoms of intermittent claudication in patients with peripheral artery disease (PAD). The investigators plan to conduct a randomized controlled trial. Clinically stable patients with PAD and intermittent claudication are randomly allocated to receive a repeated RIPC or sham for 28 days. An automated device generates RIPC. One cycle of RIPC consists of 4 cycles of 5-min upper limb ischemia followed by 5-min reperfusion (lasting a total of 35 minutes). The participant places the device on his upper arm and presses the "Start "button, starting the intervention. The intervention occurs at rest in the participant's home environment. The first intervention takes place in the research center, where the research assistant teaches the participant how to use the device. In the sham group, a RIPC imitation is performed. The sham device has the same sound and light effects as the active device; the only difference is that the pressure in the cuff does not increase, so ischemia does not occur. Randomization is performed using blocks. Each block has 2-4 subjects. Subjects are divided according to smoking status (active smoker yes/no) and age (≥ 65 years or < 65 years old). Randomized letters (whether the subject will go into the experimental group or the sham group) are placed in opaque envelopes, which are opened right before the first intervention. Participants will visit the research center twice. During the first visit, they fill in the VASCUQOL-6 questionnaire to evaluate their symptoms and health-related quality of life. In addition, the investigators collect participants' blood and urine samples, measure their arterial stiffness parameters and assess symptom-free and maximal walking distance on a treadmill. The investigators will take a skeletal muscle biopsy from the first ten participants in each group using a tiny percutaneous needle biopsy (TPNB) technique to measure low molecular weight metabolites in affected skeletal muscle. These steps are repeated on the second visit (after 28 days of intervention). After data collection is completed, a statistical analysis is performed to evaluate whether RIPC improves participants' maximal walking distance, arterial stiffness, and metabolic parameters. ;

Study Design

Related Conditions & MeSH terms

Clinical Trial Details
NCT number NCT05084066
Study type Interventional
Source Tartu University Hospital
Contact
Status Completed
Phase N/A
Start date January 24, 2022
Completion date April 18, 2023
View Details
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