Ambulance Mobile Oxygen System by SIGAS (Schütz Measurement & Control)

Overview

The Ambulance Mobile Oxygen System by SIGAS is a fully integrated, vehicle-mounted medical gas supply platform engineered for rapid deployment and continuous oxygen delivery in pre-hospital emergency care. Designed in accordance with DIN EN 1789:2020 (Ambulances — Requirements and Test Methods) and compliant with ISO 8573-1:2010 (Compressed Air Quality), the system utilizes pressure-reduction, flow-regulation, and dual-stage filtration architecture to deliver medical-grade oxygen (≥99.5% O₂ purity, Class 1 air quality per ISO 8573-1) directly from onboard high-pressure cylinders or optional external manifold connections. Its modular configuration supports both portable cylinder banks (e.g., 10 L / 200 bar) and fixed reservoir integration, enabling uninterrupted operation during extended transport, multi-patient scenarios, or field triage. The system operates within ambient temperature ranges of −20 °C to +55 °C and meets IP54 ingress protection for dust and water resistance—critical for mobile EMS environments.

Key Features

• Integrated pressure regulation: Dual-stage stainless steel regulators maintain stable outlet pressure (0–10 bar adjustable) across variable inlet pressures (50–200 bar), minimizing flow fluctuation during cylinder depletion.
• Medical-grade filtration: Three-stage filtration (coalescing pre-filter, activated carbon adsorber, and 0.01 µm final particulate filter) ensures compliance with ISO 8573-1 Class 1 for solid particles, oil aerosol, and water content.
• Redundant flow control: Independent flowmeters (0–15 L/min range, ±2% full-scale accuracy) and fail-safe shut-off valves for up to four simultaneous patient outlets.
• Vibration-damped mounting: Engineered chassis with elastomeric isolation mounts certified to ECE R10 (Electromagnetic Compatibility) and DIN 75200 (Vibration Resistance for Vehicle-Mounted Medical Equipment).
• Real-time monitoring interface: Integrated digital display shows cylinder pressure, outlet pressure, cumulative flow volume, and system status alerts (e.g., low-pressure warning, filter saturation indicator).
• Modular scalability: Compatible with SIGAS OEM accessories including heated humidification modules, oxygen concentrator bypass interfaces, and CAN bus integration for vehicle telematics reporting.

Sample Compatibility & Compliance

The system is validated for use with standard medical oxygen cylinders (DIN 46301, EN 1089-3), aluminum and composite lightweight cylinders (ISO 11119-2), and seamless steel vessels (ISO 9809-1). It supports connection to wall-mounted oxygen manifolds via standardized CGA 540 or DIN 477-1 fittings. Regulatory alignment includes conformity with EU MDR 2017/745 (Class IIa medical device), CE marking under Directive 2014/34/EU (ATEX for potential oxygen-rich environments), and adherence to national ambulance equipment standards including KTW W270 (Germany), NHS England Technical Specification TS-0132, and NFPA 1917 (Standard for Automotive Fire Apparatus—applicable to EMS vehicle integration).

Software & Data Management

While the base system operates as a standalone analog-electromechanical platform, optional SIGAS DataLink Module enables RS485/Modbus RTU or CAN 2.0B communication for integration into fleet management systems. Logged parameters—including cylinder pressure decay rate, total oxygen dispensed per shift, and valve actuation timestamps—are stored locally (16 GB internal flash) with GLP-compliant audit trail functionality. Data export supports CSV and XML formats; firmware updates follow IEC 62304 Class B software lifecycle requirements. Optional cloud synchronization (via secure TLS 1.2 tunnel) permits remote health monitoring and predictive maintenance scheduling aligned with ISO 13485:2016 QMS protocols.

Applications

• Primary and secondary emergency response: Sustained oxygen delivery during prolonged extrication, inter-facility transfer, or mass casualty incident (MCI) operations.
• Aeromedical evacuation: Certified for installation in fixed-wing and rotary-wing air ambulances meeting EASA CS-29 Appendix A and FAA AC 120-97B vibration and altitude profiles.
• Military field medicine: Deployable in tactical vehicles (e.g., Boxer, Puma) with compatibility for NATO STANAG 4650 oxygen interface specifications.
• Disaster relief coordination: Rapid integration with mobile field hospitals (WHO EMF Type III) and interoperability with WHO Emergency Health Kit (EHK) oxygen subsystems.
• Training and simulation: Used in accredited EMS academies for competency assessment under EN 15531-1 (Emergency Medical Services — Competence Requirements).

FAQ

Is this system certified for use in ISO Class 7 cleanroom transport vehicles?
Yes—the filtration architecture and leak-tight construction (helium leak rate ≤1×10⁻⁶ mbar·L/s) meet ISO 14644-1 requirements for supporting critical patient transport in controlled environments.
Can the system be retrofitted into existing ambulance models?
Yes—standardized mounting templates and vehicle-specific brackets are available for Mercedes-Benz Sprinter, Ford Transit, and Fiat Ducato platforms; installation requires adherence to DIN 75200 mechanical load testing.
Does the system support integration with hospital central pipeline pressure alarms?
Via optional SIGAS Interface Gateway, it provides dry-contact alarm outputs compatible with ASME A13.4 and HTM 02-01 alarm signaling protocols.
What is the recommended service interval for filter replacement?
Coalescing and particulate filters require replacement every 1,500 operating hours or annually—whichever occurs first—per SIGAS Maintenance Manual Rev. 4.2 (2023).
Is training provided for biomedical engineering staff?
Yes—SIGAS offers on-site commissioning, operator certification (EN 13485-aligned), and biannual refresher courses delivered by TÜV-certified instructors.