Pre-hospital Medical Plan: Ensuring Rapid Response at Disaster Sites

When a disaster strikes, the first few hours are critical. The difference between life and death often depends on how quickly and efficiently medical teams can reach victims, assess their injuries, and provide appropriate care. A pre-hospital medical plan serves as the blueprint for this rapid response, ensuring that emergency services work in a coordinated manner from the moment an incident is reported until casualties reach definitive medical care. This plan encompasses everything from establishing command centres to triaging patients and setting up mobile medical facilities at disaster sites.

Setting up emergency control centres 🔗

The foundation of any effective disaster medical response lies in establishing a well-organized emergency control centre, also known as a command post or incident command centre. This is the nerve centre from which all medical operations are coordinated during a disaster.

Location and structure of command posts 🔗

The command post should be established in a location that is safe from immediate hazards, has reliable communication capabilities, and provides adequate space for coordination activities. According to WHO guidelines, hospitals and emergency services should designate a specific location prepared to convene and coordinate emergency response activities. This area must be away from structures at risk of collapse and in zones not prone to secondary hazards like floods, fires, or contamination.

The command centre typically includes several key functional areas: an operations section that directs field activities, a planning section that tracks resource deployment, a logistics section managing supplies and personnel, and a finance section handling administrative matters. This structure follows the Incident Command System (ICS) framework, which ensures standardized coordination across different agencies responding to the same event.

Coordination and communication 🔗

Effective coordination requires establishing clear communication channels between the command post and field teams, receiving hospitals, government agencies, and support services. The disaster command centre board coordinates the entire response process and maintains continuous communication with institutions such as crisis management centres, health directorates, and emergency management authorities.

The command post is responsible for dispatching medical teams to disaster areas based on incoming information about casualty numbers and types of injuries. It also manages resource allocation, ensuring that ambulances, medical supplies, and personnel are deployed where they are most needed. Real-time tracking systems help monitor available hospital beds and medical resources, enabling informed decisions about where to transport patients.

First aid and triage at disaster sites 🔗

Once medical teams arrive at a disaster site, their first priority is to rapidly assess and categorize casualties through a process called triage. This systematic approach ensures that limited medical resources are used to provide the greatest benefit to the largest number of people.

Organizing first aid teams 🔗

First aid teams at disaster sites typically include emergency medical technicians, paramedics, nurses, and physicians who work together under a designated triage officer. The triage officer rapidly evaluates each patient to determine treatment priorities. These teams are equipped with basic medical supplies including bandages, tourniquets, airway management tools, and essential medications.

The first responders provide basic life support interventions such as controlling bleeding, maintaining airways, and administering oxygen. Their role is not to provide definitive treatment but to stabilize patients sufficiently for transport to medical facilities. This approach is counterintuitive to normal medical protocols but is essential when the number of casualties overwhelms available resources.

Triage categories and colour-coded tagging 🔗

The most widely used triage system is the START method (Simple Triage and Rapid Treatment), developed in the 1980s in California. This system, along with similar protocols used globally, categorizes patients into four main classes using colour-coded tags:

Class I (Red Tag – Immediate): These patients have severe injuries but a high potential for survival with immediate treatment. They require emergency care within minutes. Examples include victims with chest injuries affecting breathing, severe bleeding that can be controlled, or shock. Red-tagged patients are treated first and transported to hospitals as priority.

Class II (Yellow Tag – Delayed): These casualties have serious injuries but are not in immediate danger of death. They can wait 30 minutes to 2 hours for treatment without significant risk to survival. Typical cases include stable fractures, moderate burns, or back injuries without spinal cord damage.

Class III (Green Tag – Minor): Often called the “walking wounded,” these individuals have minor injuries such as sprains, abrasions, or small lacerations. They can often evacuate themselves from the disaster scene and wait several hours for treatment. Many green-tagged patients may be directed to seek care independently at nearby clinics.

Class IV (Black Tag – Expectant/Deceased): This category includes patients who are either dead or have injuries so severe that survival is unlikely even with treatment. In mass casualty situations, resources are not allocated to expectant patients as doing so would compromise care for those with better survival chances.

The tagging process 🔗

Triage should be completed in 30 to 60 seconds per patient using simple physiological criteria. The START method uses the mnemonic “RPM: 30-2-can do” to remember key assessment points: respiratory rate (over 30 breaths per minute indicates red), perfusion (capillary refill over 2 seconds indicates red), and mental status (inability to follow commands indicates red).

The tagging process begins by asking all ambulatory victims to move to a designated safe area-these individuals automatically receive green tags. Non-ambulatory patients are then assessed individually. Those not breathing even after airway opening receive black tags. Patients with abnormal vital signs receive red tags, and remaining stable patients receive yellow tags.

Evacuation procedures and staging areas 🔗

After triage, the next critical phase involves organizing the systematic evacuation of casualties from the disaster site to appropriate medical facilities. This process requires careful coordination to prevent bottlenecks and ensure that patients reach the right level of care.

Establishing staging areas 🔗

Staging areas serve as intermediate collection points between the disaster site and transport vehicles. According to hospital evacuation guidelines, these areas should be located away from immediate hazards while remaining accessible to ambulances and other transport vehicles. The staging area is designed as a temporary holding area with essential care resources needed to support patients while transportation is being arranged.

Effective staging areas include separate zones for different triage categories, clear traffic flow patterns for incoming and outgoing vehicles, communication equipment, and basic medical supplies for continued patient monitoring. Having distinct staging points for critical care transport and basic life support transport helps accelerate patient distribution.

Evacuation teams and transport coordination 🔗

Evacuation teams work under the direction of the incident command post to move patients from the disaster scene to the staging area and then to receiving hospitals. These teams include transport personnel, patient handlers, and medical monitors who continue to assess patient status during movement.

Transport coordination involves matching patient needs with appropriate destinations. Red-tagged patients typically require Level I trauma centres with surgical capabilities, while yellow-tagged patients may be transported to community hospitals. The command post tracks hospital capacity and distributes patients to prevent overwhelming any single facility.

Mobile hospitals in disaster response 🔗

When existing medical infrastructure is damaged or overwhelmed, mobile hospitals provide essential surge capacity. These deployable medical facilities can be operational within hours of arriving at a disaster site.

Types and capabilities of mobile hospitals 🔗

Mobile field hospitals come in various configurations, from tent-based facilities to containerized units. According to the World Health Organization, field hospitals are units consisting of containers, tents, or inflatable modules with at least ten beds, one operating room, basic laboratory facilities, and mobile imaging equipment.

Modern mobile hospitals can be customized for specific needs. At maximum capacity, some facilities can treat over 200 patients and perform 15 to 30 surgeries daily. They arrive with generators, water purification systems, and medical supplies sufficient for self-sustained operation. Specialized configurations include surgical suites, burn units, isolation wards for infectious disease containment, and intensive care capabilities.

Deployment and operation 🔗

Mobile hospitals are typically deployed when permanent healthcare facilities are either destroyed, contaminated, or overwhelmed by patient volume. The location where a field hospital will be established should be in a safe zone away from ongoing hazards while remaining accessible for patient transport and supply delivery.

Tents remain the most commonly used shelter for field hospitals due to their ease of installation, low cost, and portability. A trained team can have a tent-based hospital operational within 24 hours of site arrival. Alternative structures include inflatable modules, prefabricated buildings, and repurposed existing structures such as schools or sports facilities.

Field hospitals serve multiple functions beyond immediate trauma care. They provide continuity of treatment for patients evacuated from damaged hospitals, support ongoing medical needs in affected communities, and create surge capacity when local healthcare systems are overwhelmed. Some mobile units also include pharmacy services, mental health support, and chronic disease management capabilities.

Integrating pre-hospital planning with hospital response 🔗

A pre-hospital plan only works effectively when it connects seamlessly with hospital emergency operations. This integration requires advance coordination, shared communication systems, and regular joint training exercises.

Hospitals must be prepared to activate their own emergency plans when notified of an incoming mass casualty incident. This includes implementing surge protocols to increase bed capacity, calling in additional staff, cancelling elective procedures, and preparing for the specific types of injuries expected from the disaster type.

The California Medical Assistance Teams model provides a useful framework for this integration. These deployable teams support specialized health response needs including disaster triage sites, clinics, medical shelters, and mobile field hospitals, ensuring a continuum of care from the disaster scene through hospital treatment and recovery.

What do you think? How prepared is your community for a mass casualty event, and what role could ordinary citizens play in supporting emergency medical response during the critical first hours after a disaster?

References

1. https://aspr.hhs.gov/HealthCareReadiness/HPP/Pages/default.aspx
2. https://pmc.ncbi.nlm.nih.gov/articles/PMC5469841/
3. https://www.ncbi.nlm.nih.gov/books/NBK459369/
4. https://pmc.ncbi.nlm.nih.gov/articles/PMC6390156/
5. https://journalofethics.ama-assn.org/article/disaster-and-mass-casualty-triage/2010-06
6. https://www.mass.gov/doc/evacuation-toolkit-planning-guide-0/download
7. https://pmc.ncbi.nlm.nih.gov/articles/PMC7251258/
8. https://emsa.ca.gov/disaster-medical-services-division-links/