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Development of a Telemetric System for Postoperative Follow-up of Vascular Surgery Procedures: In Vitro Model
Manuel Hernando Rydings1, Pilar Marín Palacios2, Ana M Aragón-Sánchez2
1Department of Vascular Surgery, Basurto University Hospital, Universidad País Vasco, Bilbao, Spain mhrydings@hotmail.com.
Journal of the American Heart Association
|July 25, 2016
Summary
A novel wireless magnetoelastic microwire sensor can detect fluid pressure changes, aiding in postoperative vascular surgery follow-up. This technology enables wireless monitoring of stenosis in arteries and anastomoses.
Area of Science:
- Biomedical Engineering
- Materials Science
- Medical Devices
Background:
- Magnetoelastic microwires possess unique electromagnetic properties enabling pressure sensing.
- Fluid pressure variations induce mechanical stress, altering microwire magnetization detectable wirelessly.
- This forms the basis for a wireless system for monitoring vascular surgery outcomes.
Purpose of the Study:
- To develop and validate a wireless sensor for monitoring fluid pressure in vascular surgery.
- To assess the sensor's ability to detect, locate, and quantify stenosis in arteries and anastomoses.
Main Methods:
- A magnetoelastic microwire ring sensor was integrated into an in vitro pulsatile flow model.
- Stenosis was simulated in bovine arteries and polytetrafluoroethylene (PTFE) grafts.
- Signal analysis included Fourier analysis, Pearson correlation, and receiver operating characteristic (ROC) curves.
Main Results:
- A strong correlation (Pearson index 0.945, P<0.001) was found between fluid pressure and sensor signal power in bovine arteries.
- The sensor demonstrated high accuracy in detecting stenosis, with areas under the ROC curve ranging from 0.88 to 0.98.
- The system successfully detected, located, and quantified stenosis in various vascular models.
Conclusions:
- Magnetoelastic microwire sensors can effectively detect, locate, and quantify stenosis in arteries and anastomoses with high statistical significance.
- This represents the first wireless in vitro sensor developed for the postoperative follow-up of vascular surgery procedures.
