Pass the NREMT Medical Technicians EMT Questions and answers with CertsForce

The correct answers are A. Mechanisms of injury, B. If entrapment occurred, and D. Total number of patients.

During the scene size-up, the EMT performs an initial overview to ensure safety and gather critical information before patient contact. NREMT guidelines emphasize specific elements that must be identified early.

Key components of scene size-up include:

1. Mechanism of Injury (MOI) (A):

Helps predict potential injuries based on how the incident occurred

Essential for determining severity and treatment priorities

2. Entrapment (B):

Determines whether patients are physically trapped

Helps anticipate need for extrication resources and delays in care

3. Number of Patients (D):

Critical for determining if additional resources are needed

Helps identify potential mass-casualty incidents (MCI)

NREMT-aligned references state:

“Scene size-up includes determining the mechanism of injury.”

“Identify the number of patients and need for additional resources.”

“Determine if extrication or special rescue is required.”

Why the other options are incorrect:

C. Severity of the patientsThis is determined during the primary assessment, not initial scene size-up

E. Which patients have diedNot part of initial size-up priorities

F. Site for loading injured patientsThis is part of incident management/transport decisions, not initial size-up

Exact Extracts (NREMT-aligned EMT educational references):

“Determine the mechanism of injury or nature of illness.”

“Determine the number of patients.”

“Assess the need for additional resources and extrication.”

Clinical Priority Summary:

Scene size-up focuses on environmental awareness and resource needs, specifically MOI, patient count, and entrapment, making A, B, and D correct.

Personal injury prevention supplies are designed to protect EMS providers from physical injuries, rather than infection.

Option C (Pair of leather gloves) is correct because leather gloves protect against cuts, abrasions, and puncture injuries during rescue operations such as vehicle extrication.

Option D (N95 respirator) is personal protective equipment (PPE) for infection control, not injury prevention.

Option A and B are related to biohazard handling and decontamination.

NREMT differentiates PPE from injury-prevention equipment to ensure proper risk management.

This scenario suggests a potential multiple-casualty incident with a possible environmental hazard, such as carbon monoxide or another toxic gas. NREMT places strong emphasis on scene size-up as the first and most critical step in EMS operations.

Option B is correct because determining the size and scope of the incident allows the EMT to assess scene safety, identify hazards, estimate the number of patients, and determine the need for additional resources. Entering the scene without this assessment could result in responder injury or death.

Option A is incorrect because establishing command typically follows an initial size-up. Command cannot be effectively established without understanding the nature of the incident.

Option C is incorrect because announcing the presence of poisonous gas without confirmation may cause panic and is not an appropriate first action.

Option D is incorrect because attempting rescue before confirming scene safety violates NREMT’s core principle that rescuer safety comes first.

NREMT standards clearly state that EMTs must never enter a potentially hazardous scene until it has been properly assessed and deemed safe or appropriate resources are requested.

Comprehensive and Detailed Explanation (Based on NREMT standards):

For a conscious adult with complete airway obstruction, abdominal thrusts are typically indicated. However, NREMT guidelines specify that chest thrusts should be used instead for patients who are morbidly obese or pregnant, because abdominal thrusts may be ineffective or unsafe.

Option D is correct because chest thrusts provide effective airway clearance while accommodating body habitus.

Options A and B are inappropriate for a conscious patient.

Option C is incorrect because abdominal thrusts may not be effective in morbidly obese patients.

NREMT stresses modifying airway obstruction techniques based on patient size and condition.

The correct answer is B because improper splinting can compress nerves, soft tissues, and blood vessels . EMT trauma teaching materials identify this as a recognized hazard of improper splinting , which is why EMTs must check and reassess distal pulse, motor function, and sensation before and after splint application

This patient presents with severe head trauma, unresponsiveness, hypotension, tachycardia, and apnea (R = 0). NREMT education stresses that apnea following head injury is a critical red flag for increased intracranial pressure (ICP) and potential brain herniation.

Option B is correct because brain herniation occurs when swelling or bleeding within the skull forces brain tissue downward, compressing the brainstem. Compression of the brainstem can result in loss of respiratory drive, explaining the absence of respirations. Elderly patients are at increased risk due to cerebral atrophy and fragile bridging veins.

Option A is possible but does not directly explain apnea.

Option C is associated with sudden cardiac arrest after chest impact, not head trauma.

Option D would present with respiratory compromise but not directly from a forehead injury.

NREMT emphasizes rapid airway management, ventilation, spinal precautions, and immediate transport for suspected brain herniation.

The correct answer is B. Apply direct pressure.

This patient is experiencing severe arterial bleeding, as indicated by:

Bright red blood

Pulsating flow

Direct pressure is the first-line treatment for external bleeding, including arterial hemorrhage.

It is the fastest and most effective immediate intervention to control bleeding.

EMT protocols emphasize controlling life-threatening bleeding before other interventions.

A. Place a tourniquet → Appropriate if direct pressure fails or bleeding is uncontrollable, but not the first step

C. Sling and swathe → Used for immobilization, not hemorrhage control

D. Oxygen → Important, but bleeding control takes priority (circulation first in trauma)

Exact Extracts:

“Control external bleeding with direct pressure as the first step.”

“Arterial bleeding is characterized by bright red, pulsating blood.”

“Tourniquets are used when direct pressure fails to control severe bleeding.”

Defusing is an informal, short-term intervention after a critical incident. It should:

Occur within hours of the event (ideally the same shift)

Encourage voluntary open discussion in a confidential setting

It is not a full debrief or counseling session and doesn’t require mental health professionals present. Forcing participation or waiting too long (e.g., 72+ hours) can reduce its effectiveness.

The correct answer is A. Atherosclerosis.

This patient is experiencing orthostatic symptoms:

Dyspnea

Lightheadedness (feels faint)

Blurred vision

Symptoms triggered by standing and relieved with rest

These findings strongly suggest impaired cerebral perfusion during position change, commonly seen in elderly patients with atherosclerosis.

Why A is correct (Atherosclerosis):

Atherosclerosis leads to:

Narrowed and stiffened arteries

Reduced ability to adjust to positional changes

Decreased cerebral blood flow when standing

NREMT-based medical guidance emphasizes:

“Elderly patients commonly experience perfusion changes due to vascular stiffness.”

“Reduced cerebral perfusion may cause dizziness and visual disturbances with position changes.”

Why the other options are incorrect:

B. Cardiac arrhythmia: Typically causes irregular pulse and symptoms not specifically tied to positional changes.

C. Transient ischemic attack (TIA): Produces focal neurologic deficits (e.g., unilateral weakness, speech difficulty), not just position-related symptoms.

D. Dissecting aortic aneurysm: Presents with severe, tearing chest/back pain and hemodynamic instability, not transient positional symptoms.

Exact Extracts:

“Reduced cerebral perfusion can cause dizziness and syncope, especially in older adults.”

“Atherosclerosis decreases vascular elasticity and affects blood flow regulation.”

“Orthostatic symptoms are common in elderly patients with vascular disease.”

The correct answers are A, C, and E because this patient is experiencing suspected acute coronary syndrome (ACS) with hypoxia (SpO₂ 88%) and borderline hypotension .

Aspirin is indicated in suspected cardiac chest pain to reduce platelet aggregation and improve outcomes.

Oxygen is appropriate because the SpO₂ is below 94% , indicating hypoxemia.

Position of comfort (usually sitting upright) helps reduce cardiac workload and improves breathing.

NREMT guidelines emphasize treating hypoxia, reducing cardiac workload, and administering aspirin early in suspected ACS.

CPAP is not indicated due to low blood pressure (92 systolic) , and AED use is not appropriate because the patient is not in cardiac arrest.