Basic Life Support (BLS) forms the foundation of emergency care provided during search and rescue operations. In the challenging environments where search and rescue (SAR) teams operate, be it mountains, collapsed buildings, remote wilderness, or disaster zones, having a robust understanding of BLS is critical. BLS consists of essential interventions that support vital functions until advanced care arrives, focusing primarily on airway management, breathing, and circulation, as well as prompt action for life-threatening emergencies.
The primary responsibility of SAR personnel is to initially stabilize subjects until advanced medical help arrives or in preparation for transportation to advanced medical help. Training in BLS techniques does not qualify SAR personnel as EMTs or other types of trained medical personnel. Do not go beyond your training!
Core Principles of Basic Life Support
BLS in the search and rescue context centers around several core principles:
- Ensure safety: Always assess the scene for hazards before approaching a victim. Protect yourself and teammates first.
- Rapid assessment: Quickly determine responsiveness and the presence of life-threatening conditions.
- Immediate intervention: Address airway obstruction, absent breathing, or circulation issues without delay.
- Continuous monitoring: Reassess the victim frequently as conditions may change, especially in environments with fluctuating risks.
- Communication: Relay vital information to incoming medical teams or evacuation units.
The ABCs
The classic ABC approach anchors BLS:
- A: Airway: Ensure the airway is open and clear. In unconscious casualties, use techniques like the head-tilt chin-lift or jaw thrust (if spinal injury is suspected).
- B: Breathing: Assess breathing by looking, listening, and feeling. If absent or inadequate, provide rescue breaths using barrier devices if available.
- C: Circulation: Check for a pulse and signs of effective circulation. If absent, begin chest compressions immediately.
Initial Assessment
The first step in providing BLS during SAR missions is to perform a scene and subject assessment. Rescuers must evaluate the safety of the environment to avoid putting themselves at risk. Once safety is confirmed, they can assess the subject.
Search and rescue missions are critical operations that aim to locate, stabilize, and recover individuals who are lost, trapped, or injured. A key component of such missions is the initial assessment of a subject, which determines their physical condition, psychological state, and immediate needs. This assessment is pivotal in guiding the rescue team’s actions and ensuring the subject’s survival.
Key Principles of Initial Assessment
A thorough and effective initial assessment should adhere to the following principles:
- Safety first: Ensure the safety of both the rescuers and the subject before beginning any evaluation.
- Time sensitivity: Conduct the assessment quickly but comprehensively, as delayed intervention may worsen the subject’s condition.
- Documentation: Record observations and findings for future reference in treatment or handover to medical personnel.
Steps in Initial Assessment
1 Approach and Scene Evaluation
Before reaching the subject, rescuers should observe the surrounding environment to identify hazards, such as unstable terrain, extreme weather, or dangerous wildlife. Always approach the subject calmly and announce your presence to avoid startling them. Once close, assess the subject’s location for any immediate threats.
2 Primary Survey
The primary survey focuses on life-threatening conditions. Use the ABCDE approach:
- A: Airway: Ensure the subject’s airway is clear. Remove obstructions if necessary.
- B: Breathing: Check for normal breathing patterns. Look, listen, and feel for breaths.
- C: Circulation: Assess pulse and check for severe bleeding. Control hemorrhages immediately.
- D: Disability: Evaluate consciousness using the AVPU scale (Alert, Verbal response, Pain response, Unresponsive).
- E: Exposure: Inspect the subject for injuries or illnesses while protecting them from environmental elements.
3 Psychological Assessment
Assess the subject’s mental and emotional state. Look for signs of shock, panic, or disorientation. Provide reassurance and comfort to help stabilize their psychological condition.
5 Immediate Intervention
Based on the findings from the initial assessment, provide immediate care:
- Administer first aid for injuries.
- Protect the subject from environmental hazards (e.g., cold, heat).
- Ensure hydration and provide food if needed.
Airway and Ventilation
Without proper oxygenation, vital organs begin to fail within minutes, making airway management a cornerstone of emergency care. SAR teams often operate in remote or challenging locations where environmental factors such as altitude, cold, or debris may compromise airway function. Thus, a solid understanding of this BLS principle is essential for rescuers.
Search and rescue operations often involve situations where timely and effective airway and ventilation management can mean the difference between life and death. Basic life support (BLS) protocols focus on ensuring the airway remains open, adequate ventilation is provided, and oxygen delivery is maintained. For search and rescue (SAR) teams, these skills are crucial in hostile environments where medical resources are limited.
Recognizing Airway Emergencies
Early recognition of airway compromise is critical in SAR situations. Common causes of airway emergencies include:
- Obstruction due to foreign bodies, fluids, or swelling.
- Trauma to the head or neck.
- Unconsciousness leading to loss of muscle tone and airway closure.
Signs of airway compromise include noisy breathing (stridor or gurgling), cyanosis (bluish skin), and difficulty breathing. In such cases, immediate intervention is necessary.
Basic Airway Management Techniques
Head-Tilt/Chin-Lift Maneuver
This maneuver is the first-line technique to open the airway in a non-trauma victim. By tilting the head back and lifting the chin, rescuers can prevent the tongue from obstructing the airway.
Jaw-Thrust Maneuver
If spinal injury is suspected, the jaw-thrust maneuver is preferred as it minimizes cervical spine movement. The rescuer uses both hands to push the angles of the jaw upwards while stabilizing the head.
Clearing Airway Obstructions
Rescuers must be prepared to clear obstructions using suction devices, manual methods like finger sweeps (only when visible), or back blows and abdominal thrusts in cases of choking.
Airway Adjuncts
If basic maneuvers are insufficient, airway adjuncts like oropharyngeal airways (OPA) or nasopharyngeal airways (NPA) can be used. These devices maintain airway patency and are especially useful for unconscious patients. This technique is mentioned here as information only. SAR personnel trained to be efficient with BLS are not qualified to use airway adjuncts. Know when this is required and seek assistance from trained personnel.
Unique Challenges for SAR Teams
Once the airway is open, effective ventilation is necessary to restore oxygen levels. SAR teams typically employ the following methods.
SAR operations often take place in extreme environments. High altitudes can reduce oxygen availability, requiring teams to account for hypoxia. Cold temperatures can exacerbate airway and breathing difficulties, while debris and dust may cause inhalation injuries.
Unlike hospital settings, SAR teams work with minimal equipment. This demands improvisation, such as using clothing to stabilize the neck.
Effective airway and ventilation management require seamless teamwork. SAR teams should train together to anticipate each other’s actions, ensuring smooth transitions from airway management to ventilation.
CPR
CPR serves as a bridge, maintaining circulation and oxygenation until advanced medical care can be provided. In SAR scenarios, where the time to reach a hospital may be extended, the timely application of CPR can keep vital organs functioning, preventing irreversible damage and increasing the chances of survival.
This manual is not intended to train CPR but to provide an overview and review of CPR. SAR team members should seek training from a qualified instructor.
Unique Challenges in CPR During Search and Rescue
Performing CPR in SAR operations involves complexities that differ from traditional emergencies in controlled environments. These challenges include:
Remote Locations
SAR missions often take place in remote or inaccessible areas, such as mountains, forests, or disaster zones. Rescuers may need to perform CPR on uneven terrain, in confined spaces, or under extreme weather conditions.
Prolonged Response Times
Unlike urban settings where emergency medical services are minutes away, SAR teams may face delays in transporting patients to advanced care facilities. This increases the importance of sustaining CPR efforts for extended periods.
Limited Resources
SAR teams often operate with minimal medical equipment, relying on portable devices like automated external defibrillators (AEDs). Rescuers need to adapt their techniques to work effectively with the tools and supplies available.
Physical and Emotional Strain
The physical demands of CPR, combined with the stress of working in high-stakes environments, can lead to rescuer fatigue. Maintaining composure and energy is essential for delivering effective care.