ArticleIEEE sensors journal2023
A Flexible Double Helix Inductive Antenna for RFID Vascular Flow Sensing.
Article in IEEE sensors journal, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
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Who cites it
1 citing paper in PubMed.
- Recent Progress in Blood Flow Sensing.Sensors and actuators. A, Physical · 2025Article
Corrections and comments
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Authors and funding
2 authors.
Funding
Abstract
This work demonstrates a batteryless, implantable blood-flow sensor with radio frequency identification (RFID) readout. This flexible sensor system was developed specifically for surgical implantation around a blood vessel, without contacting blood to reduce platelet deposition, clotting, and other complications with blood-contacting sensors. A flexible sensor and circuit architecture was adopted to enable a cuff-like form factor for surgical implantation around an artery, vein, or graft without piercing or cutting the vessel. This required the development of a flexible RFID data/power antenna using a split-double helix antenna (DHA), which could be opened and closed, unlike a solenoidal or flat spiral antenna. DHAs with diameter of 3-10 mm were fabricated and characterized on the bench, showing a typical coupling coefficient of 0.007 when placed 5 cm from a reader. Prototype implantable DHA systems were developed to wrap around vessels of 3-8 mm. A flexible pulsation sensor (FPS) was developed from a piezoresistive carbon black-polydimethylsiloxane (PDMS) nanocomposite, which enabled the measurement of vascular distension caused by blood flow. A commercial RFID chip enabled sensor readout to an external transceiver in real time with a sample rate of 12 Hz when immersed in saline test media. Validation experiments on a vascular phantom with simulated stenosis demonstrated a blood-flow rate monitoring from 200 to 400 mL/min with the capacity to distinguish flow changes as low as 10 mL/min.
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Registered trials
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