EN 1789 Medical Tools and Equipment - Road Ambulances

The European standard “EN 1789 Medical vehicles and equipment - Road ambulances” describes the requirements for the design, testing, performance, and equipping of road ambulances used for the transport, monitoring, treatment, and care of patients. This standard includes requirements for the patient compartment in terms of the working environment, ergonomic design, and the safety of both crew and patients. This standard does not cover personnel training, which is the responsibility of the competent authority(ies) in the country where the ambulance will be registered.

This standard applies to road ambulances capable of carrying at least one person on a stretcher and does not cover the transport of hospital beds. This standard also includes requirements for ambulances intended to transport transport incubator systems.

This standard covers the specific requirements for each type of road ambulance (e.g., patient transport road ambulance types A1, A2, B, and C), determined by the patient's condition. It also provides general requirements for medical equipment transported in road ambulances and used inside and outside hospitals and clinics, in situations where environmental conditions may differ from normal indoor conditions.

The latest revision of the EN 1789 standard has two main objectives:

• The primary aim is to revise the technical aspects of the document, considering a more manageable validation process while maintaining high quality and the stringent nature of the requirements.
• The second objective is to check all references and regulations, paying particular attention to the EU.

Road ambulances and their equipment, when used normally and maintained in accordance with the manufacturer's instructions, should not present any safety hazards that can be reasonably foreseen using risk management procedures in accordance with EN ISO 14971 and are connected with their intended use. These hazards are valid under normal conditions and in the event of a single malfunction.

EN 1789 is the main European standard regulating the design, performance, safety, testing, and equipment requirements for road ambulances. It was developed to harmonize ambulance safety and functionality across Europe.

This standard exists to ensure that ambulances are not merely vehicles for transport, but fully engineered mobile medical environments capable of safely supporting emergency treatment during transport. This standard focuses on:

• Patient safety
• Crew safety
• Protection of medical equipment
• ergonomic treatment area
• Vehicle structural integrity
• Environmental control
• Electrical reliability
• Infection control
• Collision resistance

This standard acknowledges that medical personnel frequently perform advanced procedures while vehicles are in motion under emergency driving conditions.

The EN 1789 standard applies to:

• Road ambulances carrying at least one patient on a stretcher
• Emergency ambulances
• Intensive care ambulances
• Patient transport ambulances
• Ambulances carrying transport incubators

However, this does not include the following:

• Staff education
• National licensing regulations
• Vehicle registration rules
• Hospital beds used as transport devices.

The EN 1789 standard defines four ambulance categories based on patient condition and treatment capacity:

• A1 Patient transport ambulance (single patient): Non-emergency transport
• A2 Patient transport ambulance (multiple patients): Planned medical transport
• B. Emergency ambulance: Pre-hospital emergency care
• C Mobile Intensive Care Unit: Advanced Life Support and Critical Care

Type C ambulances represent the highest level of onboard treatment capacity.

The main technical requirements have been defined as follows:

• Patient compartment design: The patient compartment should provide the following:
  • Sufficient workspace for medical personnel.
  • Safe seating
  • Access to the patient from multiple sides
  • Rounded inner edges
  • Secure storage systems
  • Controlled lighting
  • Adequate ventilation

The design places great emphasis on ergonomics and operational efficiency in emergency situations.

• Collision safety and equipment containment: One of the most important sections of this standard deals with collision safety. This standard requires the following:
  • Stretchers must remain stable during collisions.
  • Medical devices must withstand high acceleration forces.
  • The cabins and oxygen systems must remain fixed.
  • Ensuring passengers are properly secured.
  • Internal structures minimize the risk of injury.

A key engineering principle is the 10g dynamic impact requirement, meaning equipment and components must withstand deceleration loads at the collision level. This is typically verified using dynamic skid testing.

• Electrical systems: This standard includes comprehensive requirements for the following:
  • Dual battery systems
  • Power management
  • Electromagnetic compatibility (EMC)
  • External shore power connections
  • Inverters and converters
  • The progress in the field of emergency lighting systems

Electrical reliability is crucial because life support systems must operate continuously during transport.

• Environmental requirements: The ambulance interior must maintain acceptable environmental conditions. Requirements include:
  • Heating performance
  • Air conditioning capacity
  • Ventilation rates
  • Noise limits
  • Moisture tolerance
  • Lighting intensity

These checks help ensure appropriate medical treatment and patient comfort.

• Medical gas systems: This standard also regulates the following:
  • Oxygen cylinder assembly
  • Gas pipeline route
  • Pressure regulators
  • Leak prevention
  • Labeling and identification

Improperly secured oxygen systems can pose significant dangers during collisions.

EN 1789 requires numerous validation tests, including the following:

• Dynamic crash test: Verifying holding safety.
• Electrical testing: Ensuring system reliability.
• Ventilation test: Verifying airflow performance.
• Noise measurement: Limiting excessive indoor noise.
• Lighting measurement: Ensuring treatment visibility.
• Temperature test: Verifying climate control.
• Mechanical durability test: Evaluating the durability of the cabinet and assembly.

These tests aim to simulate real working conditions.

The latest revision of this standard has introduced requirements for electrically powered ambulances. The updated versions include guidance for:

• Battery system integration
• High voltage safety
• Electrical insulation
• Charging infrastructure compatibility
• Emergency shutdown procedures

This reflects the increasing use of electric commercial vehicle platforms in emergency medical service fleets.

The EN 1789 standard is important for the following reasons:

• Protection during accidents
• Standardized emergency care
• Better working conditions
• Reduced liability and regulatory compliance.

The EN 1789 standard is commonly used by:

• Ambulance manufacturers
• Vehicle converters
• Emergency Medical Services (EMS) organizations
• Fire and rescue organizations
• Hospitals
• Military medical transport units
• Certification laboratories
• State procurement authorities

The EN 1789 standard is commonly used in conjunction with the following:

• ISO 10542 Passenger safety systems
• IEC 60601 Medical electrical equipment
• UNECE R10 EMC requirements
• UNECE R14 Seat safety systems
• UNECE R17 Seat safety

In conclusion, the EN 1789 standard is one of the most influential ambulance engineering standards in Europe. It transforms ambulances from simple transport vehicles into highly controlled medical environments designed for emergency care under challenging conditions.

Our organization, with its competent and experienced staff, has been understanding the needs of its clients for many years, providing the advanced testing services they require, and assisting in the establishment, implementation, and improvement of management systems. Within this framework, we also provide testing services in accordance with the EN 1789 standard.