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| ID | Type | Description | Link |
|---|---|---|---|
| 2023-A01784-41 | Registry Identifier | ID-RCB |
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| Name | Class |
|---|---|
| phymedexp | UNKNOWN |
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The measurement of magnetic fields emitted by cardiac activity has already been studied in magneto-cardiography. To date, however, this technology has never been evaluated in the peripheral circulation.
The magnetic susceptibility of iron in the circulating blood and the ionic currents in the blood stream generate a very weak induced magnetic current, which can be detected by the micro-sensor of the prototype investigators wish to study.
Proving the validity of this prototype would make it a new diagnostic and even prognostic tool, non-invasive, less costly and more accessible than Doppler for screening peripheral arterial disease.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Magnetic sensor | Experimental | The CapMagic device is a small magnetic sensor, whose technology is derived from magnetocardiography, with a very weak field identical to that of a refrigerator magnet, which is placed on the foot or toe to record curves reflecting the state of the arterial network. It does not require direct skin contact. |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Evaluation by magnetic sensor | Device | Evaluation by magnetic sensor on arm and leg |
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| Measure | Description | Time Frame |
|---|---|---|
| Correlation of the two curve amplitudes (y) versus time (x) between the signal recording obtained by the CapMagic prototype on the radial artery and the pulsed echo-Doppler recording on the radial artery | Correlation of the two curve amplitudes (y) versus time (x) between the signal recording obtained by the CapMagic prototype on the radial artery and the pulsed echo-Doppler recording on the radial artery, in adult patients with or without AOMI in hospital. The result is expressed by a Spearman correlation coefficient ranging from -1 to 1, with 0 corresponding to no correlation and 1 corresponding to a perfect positive correlation | On day 1 |
| Measure | Description | Time Frame |
|---|---|---|
| Correlations of the two curve amplitudes (y) versus time (x) between the signal recording obtained by the CapMagic prototype and the pulsed echo-Doppler recording, measured on the plantar artery on one side and on the pulpal artery on the other | Correlations of the two curve amplitudes (y) versus time (x) between the signal recording obtained by the CapMagic prototype and the pulsed echo-Doppler recording, measured on the plantar artery on one side and on the pulpal artery on the other, in adult patients with or without LEAD in hospital. The result is expressed by a Spearman correlation coefficient ranging from -1 to 1, with 0 corresponding to no correlation and 1 corresponding to a perfect positive correlation |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Gudrun Boge, MD | Contact | +33467336279 | g-boge@chu-montpellier.fr |
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| University Hospital Center | Recruiting | Montpellier | France |
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| On day 1 |
| Correlation of the Pulsatility index (or Gosling Pulsatility index) between the signal recording obtained by the CapMagic prototype and the pulsed echo-Doppler recording | IP=P/M where P=maximum amplitude of the trace (from highest positive value, i.e. peak systolic, to lowest value) and M=average circulatory velocity, averaged over the entire cardiac cycle. Calculated from the Doppler or CapMagic curves. | On day 1 |
| Correlation of the Systolic rise time (SRT) between the signal recording obtained by the CapMagic prototype and the pulsed echo-Doppler recording | Systolic rise time (SRT), (ms) : the time between the foot and the peak of the pulse wave. Calculated from the Doppler or CapMagic curves. | On day 1 |
| Correlation of the Systolic peak between the signal recording obtained by the CapMagic prototype and the pulsed echo-Doppler recording | Systolic peak, Measured in cm/s or mV: Peak height in systole. Calculated from the Doppler or CapMagic curves. | On day 1 |
| Correlation of the maximum acceleration of systolic rise between the signal recording obtained by the CapMagic prototype and the pulsed echo-Doppler recording | The maximum acceleration of systolic rise (cm/s2) calculated from the Doppler or CapMagic curves. | On day 1 |
| Correlation of Presence of critical ischemia measured by the CapMagic prototype and the pulsed echo-Doppler recording | critical ischemia is defined by systolic pressure at toe < 30 mmHg or ankle < 50mmHg, or diagnosis of critical ischemia retained by the team in the impossibility of obtaining pressure measurements | On day 1 |
| ID | Term |
|---|---|
| D058729 | Peripheral Arterial Disease |
| D001157 | Arterial Occlusive Diseases |
| ID | Term |
|---|---|
| D050197 | Atherosclerosis |
| D001161 | Arteriosclerosis |
| D014652 | Vascular Diseases |
| D002318 | Cardiovascular Diseases |
| D016491 | Peripheral Vascular Diseases |
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