Related Experiment Video
Updated: May 9, 2026
08:25
Construction of a Wireless-Enabled Endoscopically Implantable Sensor for pH Monitoring with Zero-Bias Schottky Diode-based Receiver
Published on: August 27, 2021
Implantable electrolyte conductance-based pressure sensing catheter, II. Device construction and testing
Robert Tan1, Peyman Benharash, Peter Schulam
1Department of Bioengineering, University of California Los Angeles, Los Angeles, CA, 90095, USA.
Biomedical Microdevices
|July 23, 2013
Summary
Researchers developed a novel, low-cost blood pressure sensor using an electrolyte-filled elastic tube. This innovative device offers accurate pressure measurement with potential for widespread use in various medical applications.
Area of Science:
- Biomedical Engineering
- Medical Devices
- Sensor Technology
Background:
- Direct arterial blood pressure measurement often relies on bulky external equipment prone to artifacts.
- Existing in situ sensors are effective but can be costly and difficult to miniaturize.
Purpose of the Study:
- To develop a cost-effective and miniaturizable alternative for blood pressure monitoring.
- To explore a novel sensing principle based on the electrical conductance of an electrolyte solution within a deforming elastic tube.
Main Methods:
- An elastic tube filled with an electrolyte solution was used as the core sensing element.
- Changes in the tube's dimensions due to external pressure were measured by monitoring the electrical conductance of the solution.
- Prototypes were tested in vitro and in vivo using a porcine model.
Main Results:
- In vitro testing demonstrated a linear pressure response and a resolution of 1 mmHg.
- In vivo studies showed comparable performance to a commercial pressure transducer in the femoral artery.
- The sensor is fabricated from inexpensive materials and is easily miniaturized.
Conclusions:
- The developed sensor offers a scalable and cost-effective approach to blood pressure measurement.
- Potential applications include monitoring intracranial, spinal, and interstitial pressures.
- This technology presents a promising alternative to existing invasive pressure monitoring methods.
