PHTLS - Prehospital Trauma Life Support Scene Assessment and Safety Questions and Answers — Questions and Answers
Question 1: Upon arriving at the scene of a motor vehicle collision, which of the following is the highest priority for the prehospital trauma provider?
- Determining the mechanism of injury (MOI).
- Assessing for immediate threats to your own safety. (Correct answer)
- Triaging the number of patients involved.
- Initiating the primary survey (XABCDE) on the closest patient.
Correct answer: Assessing for immediate threats to your own safety.
The absolute first priority in any response is ensuring the safety of the responding crew. Before any patient contact can be made, providers must perform a thorough scene size-up to identify and mitigate any potential hazards, such as traffic, fire, hazardous materials, or violence. Only after the scene is deemed safe can providers proceed with other essential tasks like determining MOI, number of patients, and patient assessment.
Question 2: You are dispatched to a construction site where a worker has fallen from scaffolding. As you approach, you see a downed electrical line near the patient. What is the most appropriate initial action?
- Immediately run to the patient to begin assessment, avoiding the wire.
- Use a dry, non-conductive object to move the wire away from the patient.
- Stage a safe distance away and notify the power company to secure the hazard. (Correct answer)
- Instruct a bystander to check if the patient is in contact with the wire.
Correct answer: Stage a safe distance away and notify the power company to secure the hazard.
Downed power lines present a lethal threat. The correct procedure is to maintain a safe distance (at least 30 feet from downed distribution lines), prevent others from entering the area, and request that the appropriate utility company respond to de-energize the line. Attempting to move the wire or approaching the patient before the scene is electrically safe risks severe injury or death to the rescuer.
Question 3: During the scene size-up of a multi-vehicle crash on a highway, which of the following components is essential for resource management?
- Obtaining detailed medical histories from uninjured occupants.
- Estimating the speed of the vehicles involved.
- Determining the total number of patients. (Correct answer)
- Documenting the exact time of the incident.
Correct answer: Determining the total number of patients.
A key component of the scene size-up is identifying the number of patients to determine if additional resources, such as more ambulances or specialized teams, are needed. This step is critical for initiating a mass casualty incident (MCI) response if the number of patients exceeds the capabilities of the initial responding units. While other factors are part of the overall assessment, determining patient count directly impacts immediate resource allocation.
Question 4: Which of the following is the primary purpose of evaluating the Mechanism of Injury (MOI) during a trauma scene assessment?
- To definitively diagnose specific internal injuries.
- To determine the patient's exact Glasgow Coma Scale (GCS) score.
- To develop an index of suspicion for potential injuries. (Correct answer)
- To decide which hospital the patient must be transported to.
Correct answer: To develop an index of suspicion for potential injuries.
Evaluating the mechanism of injury helps the provider develop an index of suspicion for the types and severity of injuries that may not be immediately apparent. For example, significant vehicle damage or a long fall suggests a large transfer of energy to the patient, increasing the likelihood of severe internal trauma. While MOI does not diagnose injuries, it is a crucial tool for anticipating them and guiding the physical assessment.
Question 5: When assessing a trauma scene, which of the following best describes the principle of 'situational awareness'?
- Focusing solely on the patient's most obvious injury.
- Continuously re-evaluating the scene for changing conditions and new threats. (Correct answer)
- Strictly following a memorized protocol without deviation.
- Delegating all safety monitoring tasks to law enforcement officers.
Correct answer: Continuously re-evaluating the scene for changing conditions and new threats.
Situational awareness is the ongoing process of observing and understanding the environment, including potential hazards, the patient's condition, and the actions of others. A scene that is initially safe can become dangerous at any moment due to factors like changing traffic patterns, fire, or the arrival of hostile individuals. Constant reassessment is a critical aspect of scene safety.
Question 6: You respond to an assault in a private residence. The scene appears calm, but the patient seems fearful and is glancing at a closed door. Which of the following is the most prudent action?
- Ignore the patient's behavior and focus on the physical assessment.
- Ask the patient to speak up and tell you what is wrong.
- Position yourself between the patient and the door to block a potential escape.
- Maintain a high index of suspicion, ensure an escape route, and consider requesting law enforcement backup. (Correct answer)
Correct answer: Maintain a high index of suspicion, ensure an escape route, and consider requesting law enforcement backup.
The safety of the EMS crew is paramount. Subtle cues, such as a patient's nervous behavior or body language, can indicate a potential threat. In this scenario, the provider should trust their instincts, maintain awareness of their surroundings, ensure they have a clear path to an exit, and request police presence to secure the scene before proceeding with patient care in a potentially volatile environment.
PHTLS - Prehospital Trauma Life Support Scene Assessment and Safety Questions and Answers
Upon arriving at the scene of a motor vehicle collision, which of the following is the highest priority for the prehospital trauma provider?