Diabetes Mellitus, Type 2, Vasodilation
Conditions
Keywords
Vibration, Peripheral Artery Hemodynamics, Diabetes Mellitus
Brief summary
Application of vibration has been previously shown to affect tissue perfusion and utilized in different branches of medicine. Little is known about the acute impact of vibration application on peripheral artery hemodynamics. In this study, investigators intend to assess: 1. vibration induced hemodynamic changes in brachial artery in non-diabetic patients and compare the characteristics of these alterations with flow mediated dilation mediated changes in same cohort. 2. compare the characteristics of vibration mediated hemodynamic alterations in diabetic and non-diabetic subgroups.
Detailed description
Background and Rationale: Vibration application has been previously shown to affect tissue perfusion and utilized in different branches of medicine. However, previous studies have mainly focused on the impact of vibration on skin perfusion or vibration with active muscle contractions, therefore couldn't truly demonstrate acute impact of local vibration application on peripheral arteries. In addition to that, as a population that is prone to develop vascular problems, it is not known whether diabetic patients have comparable response to vibration application with non-diabetic population. Objectives: In this study, investigators aim to demonstrate and compare hemodynamic alterations in brachial artery with paired measurements pre- and post- vibration application and compare the characteristics of these changes with those of flow-mediated dilation in a non-diabetic cohort. Additionally, differences and similarities in vascular hemodynamic response to vibration in diabetic and non-diabetic subgroups are intended to be elucidated. Methods: Flow mediated dilatation and vibration will be applied after the participants will abstain from alcohol, caffeine and nicotine for 24 hours. Flow mediated dilatation (FMD) will be induced via 5 min cuff inflation below left elbow at supra-systolic pressures (50mmHg above pre-application systolic pressure). Vibration will be applied with a commercially available vibration plate to forearm at 20 hz and 3 mm of vertical amplitude for 5 minutes, 30 minutes after termination of FMD. Left Brachial artery flow will be measured with pulsed Doppler and diameter will be measured via 2D ultrasonographic imaging at 0th, 2nd, 4th, 6th, 8th minutes.Throughout the entire application and measurement periods, patients will be continuously monitored with electrocardiogram.
Interventions
DEVICELocal Vibration Application Following Flow Mediated Dilation
Flow mediated dilatation will be induced via 5 min cuff inflation below left elbow at suprasystolic pressures (50mmHg above preapplication systolic pressure). Vibration is applied with a commercially available vibration plate to forearm at 20 hz and 3 mm of vertical amplitude for 5 minutes, 30 minutes after termination of FMD.
Flow mediated dilatation will be induced via 5 min cuff inflation below left elbow at suprasystolic pressures (50mmHg above preapplication systolic pressure).
Sponsors
Istanbul University
Study design
Allocation
NON_RANDOMIZED
Intervention model
SINGLE_GROUP
Primary purpose
BASIC_SCIENCE
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
18 Years to 80 Years
Healthy volunteers
Yes
Inclusion criteria
* 18 - 80 * Sinus Rhythm in ECG * Ejection Fraction \> %35 * Informed Consent
Exclusion criteria
* Unstabile angina * Certain or suspected subclavian artery or brachial artery atherosclerotic disease (assessed with USG) * Heart failure ( New York Heart Association III - IV) * Atrial fibrillation or frequent extrasystoles in ECG.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Brachial Artery Diameter | Up to 10 minutes after vibration application initiation | vessel diameter in millimeters |
| Brachial Artery Mean Flow Velocity | Up to 10 minutes after vibration application initiation | Mean flow velocity ( cm/sec) measured with Doppler |
Other
| Measure | Time frame | Description |
|---|---|---|
| Magnitude of Maximum Blood Flow Change | Up to 10 minutes after vibration application initiation | Magnitude of Maximum Blood Flow Change in Diabetic and Nondiabetic subgroups |
| Magnitude of Maximum Diameter Change | Up to 10 minutes after vibration application initiation | Magnitude of Maximum Diameter Change in Diabetic and Nondiabetic subgroups |
| Magnitude of Maximum Resistance Change | Up to 10 minutes after vibration application initiation | Magnitude of Maximum Resistance Change in Diabetic and Nondiabetic subgroups |
| Magnitude of Maximum Mean Flow Velocity Change | Up to 10 minutes after vibration application initiation | Magnitude of Maximum Mean Flow Velocity Change in Diabetic and Nondiabetic subgroups |
Countries
Turkey (Türkiye)
Outcome results
None listed