BET Breath Sampling System by IONICON Analytik GmbH

Overview

The BET Breath Sampling System is a CE-marked, clinically validated gas sampling interface engineered by IONICON Analytik GmbH (Innsbruck, Austria) for real-time, quantitative breath analysis via mass spectrometry. Designed specifically to bridge human respiratory physiology with high-sensitivity analytical instrumentation, the system implements a patented end-tidal buffer sampling architecture that isolates the alveolar phase of exhalation—where volatile organic compound (VOC) concentrations best reflect systemic metabolic and pathological states. Unlike conventional sidestream or mainstream capnography adapters, the BET integrates active thermal management (70 °C heated sample path), low-dead-volume fluidics (<40 mL internal volume), and pressure-stabilized flow control to preserve VOC integrity, minimize condensation, and eliminate analyte adsorption on tubing walls. Its sub-100 ms response time enables synchronization with ventilator cycles and spontaneous breathing patterns, supporting both ICU monitoring and controlled clinical research protocols.

Key Features

• Patented end-tidal buffer sampling mechanism ensures selective capture of alveolar breath fractions, enhancing biomarker specificity and reproducibility across repeated measurements.
• Heated sample pathway maintained at 70 °C throughout the entire 2-meter sampling line and internal chamber, preventing water vapor condensation and VOC loss due to surface adsorption.
• Low internal volume (40 mL) and optimized laminar flow design reduce transit delay and memory effects, enabling rapid system equilibration and high temporal resolution during dynamic breath-by-breath analysis.
• Compatible with both pressure-controlled and flow-triggered ventilation modes; supports integration into existing anesthesia workstations and critical care monitors without signal interference.
• Fully compliant with ISO/IEC 60601-1:2012 + A1:2020 for medical electrical equipment safety, including electrical isolation, leakage current limits, and mechanical stability under clinical environmental conditions.

Sample Compatibility & Compliance

The BET system interfaces seamlessly with quadrupole, time-of-flight (TOF), and proton-transfer-reaction (PTR) mass spectrometers—requiring only standard 6-mm or 1/4-inch Swagelok-compatible inlet connections. It accommodates adult, pediatric, and neonatal tidal volumes (100–1500 mL) through adjustable flow rate settings (50–500 mL/min). All wetted materials—including PTFE-lined stainless-steel valves and fused silica-reinforced silicone tubing—meet USP Class VI biocompatibility requirements and are certified non-reactive toward oxygenated VOCs, ketones, aldehydes, and sulfur-containing metabolites. The device is supplied with documentation supporting traceability to EN ISO 13485:2016 quality management systems and includes a Declaration of Conformity for EU MDR 2017/745 Annex II Class IIa classification.

Software & Data Management

While the BET operates as a hardware interface without embedded firmware or standalone software, it delivers synchronized analog TTL trigger outputs (exhalation onset, end-tidal peak) compatible with LabVIEW, MATLAB, and third-party acquisition platforms. When integrated with IONICON’s TOF-MS instruments, the system enables automated breath-phase gating, real-time VOC ratio calculation (e.g., acetone/isoprene), and timestamp-aligned spectral averaging per respiratory cycle. Audit trails, user access logs, and configuration change records can be maintained within the host mass spectrometer’s data acquisition suite, supporting compliance with FDA 21 CFR Part 11 when deployed in GLP or GCP-regulated clinical trials.

Applications

• Clinical pharmacokinetic studies: Real-time tracking of inhaled anesthetic metabolism (e.g., sevoflurane degradation to compound A) and exogenous tracer kinetics (e.g., ¹³C-labeled substrates).
• Non-invasive disease phenotyping: Detection of breath-based VOC signatures associated with lung cancer (e.g., C₄H₈O, C₆H₁₂O), diabetic ketoacidosis (acetone, isopropanol), and hepatic encephalopathy (dimethyl sulfide, mercaptans).
• Critical care monitoring: Continuous assessment of pulmonary shunt fraction, dead space ventilation, and mitochondrial dysfunction via CO₂/O₂ exchange kinetics coupled with VOC profiling.
• Translational respiratory physiology: Validation of novel biomarkers in controlled challenge models (e.g., ozone exposure, allergen inhalation, exercise stress testing).

FAQ

Is the BET system compatible with non-IONICON mass spectrometers?
Yes—the BET provides standardized pneumatic and electrical interfaces (6-mm inlet, 0–10 V analog output, TTL trigger signals) and has been validated with Thermo Fisher, Waters, and TOFWERK instruments.
Does the system require calibration gases or routine maintenance?
No calibration gases are needed for sampling functionality; however, periodic verification of heating uniformity (using NIST-traceable thermocouples) and leak testing per ISO 8573-7 is recommended every 6 months.
Can the BET be used during mechanical ventilation with PEEP?
Yes—its pressure-compensated sampling valve maintains stable flow rates across PEEP levels up to 20 cm H₂O and supports inspiratory hold maneuvers without flow interruption.
What documentation is provided for regulatory submissions?
IONICON supplies technical files, risk management reports (ISO 14971), EMC test certificates (EN 61326-1), and clinical evaluation summaries aligned with MDR Annex XIV requirements.