Pressure Mapping Mattress — Biomedical Instrumentation & Clinical Sensing

Abstract — Pressure Mapping Mattress

CH-5232 Villigen PSI, bSorbonne Universit´e, CNRS UMR 7590, Institut de Min´eralogie, de Physique des Mat´eriaux Figure 1: Diagnostic Medical Waveform & Bio-Potential Clinical Trace for Pressure Mapping Mattress We discuss the use of commercial high-power light emitting diodes (LEDs) as a light source for Iuorescence pressure measurements. A relatively broad light emitting spectra of single color LEDs (in comparison with lasers) do not prevent producing narrow Iuorescence lines at least for two widely used pressure indicator materials, namely ruby (Cr3+:Al2O3) and strontium tetraborate (Sm2+:SrB4O7). Strongest responses of both pressure indicators were detected for the green color LEDs with the average wavelength λav ∼530 nm. LEDs might be easily implemented for producing Iber coupled, as well as the parallel light sources. LEDs were found to be eIcient to replace laser sources in piston-cylinder cell and diamond anvil cell Iuorescence pressure measurement setups.

Sensor Interfacing & Analog Front-End Conditioning

light-emitting diodes; Iuorescence; diamond anvil pressure cell; piston-cylinder coexistence and interplay of diIerent energy scales in a broad variety of materials. In some particular cases, the external pressure may lead to formation of a new, previously unknown, structural phases with unique physical properties which were not detected at ambient pressure conditions. One of the major example is the observation of a nearly room temperature superconductivity in hydrogen rich materials, where the new phases were synthesized inside diamond anvil cells by keeping them at hundreds of gigapascal pressures (see e.g. Refs.

Bio-Signal Waveform Analysis & Simulation Findings

Figure 2: Diagnostic Medical Waveform & Bio-Potential Clinical Trace for Pressure Mapping Mattress and references therein). One of the drawbacks of pressure experiments is the necessity of using especially dedicated containers (cells), which are suitable for generating high pressures. The key question, in such case, becomes the knowledge of an accurate pressure value (p) arXiv:2305.08243v1 [cond-mat.mtrl-sci] 14 May 2023 inside the cell, which, in most of the cases, diIers from the simpliIed assumption of p = Fap/S (where, Fap and S are the applied force and the area to which this force is being applied, respectively). The most direct way is to look on the response of a so-called pressure indicator, which might be placed inside the cell chamber together with the sample under investigation. Such pressure indicator needs, on the one hand, to be small in order not to occupy much of the cell volume available for the sample and, on the other hand, to be sensitive to the applied pressure.

Scope & Clinical Applications

• Real-time multi-parameter vital signs telemetry (ECG, Heart Rate, SpO2, Temperature, Respiration)
• Low-noise Analog Front-End (AFE) conditioning with active Driven Right Leg (DRL) 50 Hz cancellation
• Digital signal processing in MATLAB: Pan-Tompkins QRS detection, FIR/IIR notch, and Continuous Wavelet Transforms
• Finite element tissue bio-electromagnetics and orthopedic mechanical simulations in COMSOL & ANSYS
• Complete Arduino firmware .INO sketches, circuit schematics, and university dissertation reports