Researchers developed smart catheter that can sense pressure inside the body in real time
When doctors use catheters (thin flexible tubes) inside the body for diagnosis or treatment, it’s hard to know how much pressure the catheter applies to the surrounding tissues. Too much pressure can damage tissues, while too little pressure might make the procedure less effective.
They integrated tiny piezoelectric sensors (which generate electric signals when pressure applied) into the catheter surface. This works across a wide pressure range (0–80 kPa).
Pressure at multiple directions inside the body (like in blood vessels or airways) can be measured which help doctors during surgeries.
Sensitivity is measured by,
Here The custom signal acquisition circuit is designed to: Amplify the weak voltage, Convert it into digital data, and Display the pressure graph on screen instantly
They used a thermal drawing process for catheter fabrication. The main sensing material is P(VDF-TrFE)poly vinylidene fluoride-co-trifluoroethylene – a flexible plastic film that reacts to pressure and can bend easily without breaking.
Source: https://arxiv.org/abs/2511.00978
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