Whole Body Inhalation Exposure System by TSE Systems

Overview

The TSE Systems Whole Body Inhalation Exposure System is an engineered platform for controlled, reproducible, and physiologically relevant inhalation toxicology studies in rodents. Based on the principle of whole-body exposure—where animals breathe freely within a sealed chamber—the system enables homogeneous distribution of test atmospheres (gases, vapors, liquid aerosols, or dry powders) under either static (headspace) or dynamic (flow-through) conditions. Its signature chamber geometry—an oval-rectangular main body terminating in pyramidal end caps—minimizes dead-volume zones and promotes laminar, uniform airflow patterns across the entire animal housing zone. This design ensures consistent dose delivery per unit time and mass, critical for regulatory-grade repeat-dose and subchronic inhalation studies aligned with OECD Test Guidelines 412 (28-day) and 413 (90-day), as well as EPA OPPTS 870.3465 and ISO 10993-12 requirements for biocompatibility assessment of medical device leachables.

Key Features

• Modular stainless steel construction (AISI 316L grade) with electropolished interior surfaces, ensuring corrosion resistance, cleanability, and compatibility with aggressive test agents including chlorine, ozone, and organic solvents.
• Customizable chamber volume and footprint: Standard configurations range from 0.5 m³ to 3.0 m³; scalable designs accommodate single-species or multi-species cohorts (e.g., simultaneous rat/mouse exposures).
• Integrated flow monitoring: Precision-matched inlet manifolds with calibrated mass flow meters (±1% FS accuracy) and real-time pressure differential sensors enable continuous verification of chamber residence time and air exchange rate (ACH).
• Multi-port architecture: Up to 12 configurable ports per chamber—including aerosol/gas inlets, exhaust lines, isokinetic sampling taps, and optional humidity/temperature/CO₂ monitoring interfaces—pre-wired and labeled per ISO 8573-1 cleanliness class.
• Animal welfare–integrated infrastructure: Standard cage racks support TSE-certified stainless steel cages (ISO 11784/11785 RFID-compatible); optional automatic watering systems with non-drip valves and drip trays meet AAALAC International housing standards.
• Safety-rated observation: 15 mm-thick polycarbonate viewing windows (EN 12600 Class P2A impact resistance) permit uninterrupted behavioral monitoring without compromising atmospheric integrity or requiring chamber depressurization.

Sample Compatibility & Compliance

The system supports exposure to gaseous compounds (e.g., NO₂, SO₂, ozone), volatile organic compounds (VOCs), nebulized pharmaceuticals (e.g., monoclonal antibody formulations), and respirable dry powders (MMAD 1–5 µm, GSD < 2.0). All wetted components comply with USP Class VI and FDA 21 CFR Part 11 requirements for material certification. Chamber validation includes ISO 14644-1 Class 7 particulate testing, traceable thermohygrometric mapping (±0.3°C / ±2% RH), and aerosol uniformity assessment per ASTM E1708 Annex A2. Documentation packages include IQ/OQ protocols, calibration certificates for all integrated sensors, and full traceability to NIST standards—essential for GLP audits and regulatory submission dossiers (e.g., REACH, PMDA, Health Canada).

Software & Data Management

TSE’s ExposControl™ v4.2 software provides centralized control of exposure parameters (flow rate, temperature, relative humidity, O₂/CO₂ levels), automated logging at 1-second intervals, and export-ready CSV/Excel reports compliant with ALCOA+ principles. Audit trails record all user actions, parameter changes, and alarm events with electronic signatures. The system supports 21 CFR Part 11-compliant user role management (Admin, Operator, Reviewer), encrypted database storage, and seamless integration with LIMS platforms via HL7 or RESTful API. Raw data files are archived with SHA-256 checksums and time-stamped digital signatures to satisfy ICH M7 and ICH E6(R3) data integrity expectations.

Applications

• Regulatory inhalation toxicology: 28-day, 90-day, and chronic studies per OECD 412, 413, and 418 guidelines.
• Inhalable drug development: PK/PD evaluation of dry powder inhalers (DPIs), soft mist inhalers (SMIs), and nebulized biologics.
• Environmental health research: Nanomaterial respiratory deposition modeling, wildfire smoke component toxicity screening, and urban air pollutant mixture effects.
• Medical device safety: Leachable vapor testing of polymer-based implants, sterilant residuals (e.g., EtO, hydrogen peroxide), and packaging off-gassing assessments.
• Veterinary pharmacology: Species-specific dose-response characterization in guinea pigs and hamsters where head-only systems are impractical.

FAQ

What rodent species are validated for use with this system?
Mice (C57BL/6, BALB/c), rats (Sprague-Dawley, Wistar), Syrian hamsters, and Hartley guinea pigs have been experimentally validated across all standard chamber configurations.
Can the system be validated for Good Laboratory Practice (GLP) compliance?
Yes—TSE provides full IQ/OQ documentation kits, certified calibration records, and on-site qualification support traceable to ISO/IEC 17025-accredited laboratories.
Is remote monitoring supported during long-term exposures?
ExposControl™ enables secure web-based access to real-time chamber status, historical trends, and alarm notifications via TLS 1.2–encrypted connections.
How is aerosol uniformity verified across the chamber volume?
Uniformity is confirmed using cascade impactor sampling at ≥6 spatially distributed locations per ISO 10993-12 Annex C, with coefficient of variation (CV) maintained below 15% for MMAD and total mass concentration.
Are spare parts and service contracts available globally?
TSE maintains regional technical hubs in the EU, USA, and APAC; all critical wear components (seals, filters, flow sensors) are stocked with ≤5-business-day lead time under extended warranty agreements.