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August 10, 2026Journal of Medical Engineering & Technology

Development of a digital dual-channel pressure biofeedback unit: a proof-of-concept for clinically driven re-engineering

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Why the study?

Lumbopelvic exercise monitoring has traditionally relied on single-channel analogue pressure units, limiting clinical translation of simultaneous transvaginal and external abdominal pressure assessment.

Design

Bench characterisation proof-of-concept study

Key result

A proof-of-concept digital dual-channel pressure biofeedback unit demonstrated high linearity (R2 > 0.99) with a mean absolute error of less than 1.1 mmHg during static bench characterization.

Authors

RIRafet Irmak

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Overview

Enables simultaneous transvaginal-abdominal pressure monitoring in lumbopelvic exercise; leaves open clinical adoption pending validation trials.

Key Points

  • The aim is to develop a digital biofeedback unit capable of integrating pressure measurement for therapeutic exercise.
  • Developed a digital architecture using a PIC16F1789 microcontroller and dual differential pressure sensors.
  • Implemented continuous wireless telemetry and created a user-friendly R-based interface.
  • Conducted static bench characterisation to evaluate system reliability across a pressure range of 20–100 mmHg.
  • Achieved high linearity (R2 > 0.99) with a mean absolute error of less than 1.1 mmHg.
  • Inter-channel standard deviation measured at 0.72 mmHg, indicating consistent performance.
  • Establishes a dual-channel effective frame rate of approximately 39 Hz suitable for real-time monitoring.

Structured PICO

P
Population
Bench-level demonstrator (no human subjects)
I
Intervention
Digital dual-channel pressure biofeedback unit (PIC16F1789 microcontroller, dual differential pressure sensors)
C
Comparator
Comparator-based static bench characterisation (20–100 mmHg)
O
Outcome
Linearity, mean absolute error, and inter-channel standard deviation

Main Result

Effect estimate: R2 > 0.99

A proof-of-concept digital dual-channel pressure biofeedback unit demonstrated high linearity and low error in bench testing, providing an open-hardware blueprint for lumbopelvic rehabilitation research.

Limitations

  • Currently functions as a robust bench-level demonstrator rather than a clinically validated diagnostic tool

Cite This Study

Rafet Irmak (2026) studied Lumbopelvic rehabilitation. Digital dual-channel pressure biofeedback unit vs. Commercial pressure biofeedback units was evaluated on Static bench characterisation (20–100 mmHg) (R2 > 0.99). A proof-of-concept digital dual-channel pressure biofeedback unit demonstrated high linearity (R2 > 0.99) with a mean absolute error of less than 1.1 mmHg during static bench characterization.

synapsesocial.com/papers/6a797d479c20a9bbd318487fhttps://doi.org/10.1080/03091902.2026.2713029
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