RRT TMC Exam| Complete 160 Questions And
Correct Answers With Rationale| 100%
Accurate| 2024-2025| A+ Grade
1. You Are Called To The Emergency Department To Help Care For A Patient Who Was In
A Vehicle Accident And Has Chest Injuries Including Broken Ribs. Crepitations Are Felt
While Palpitating The Patient's Neck. What Is Most Likely The Cause Of This?
Choices:
• A) The Patient's Lung Has An Air Leak
• B) The Patient Has A Fractured Clavicle
• C) The Patient Has Subcutaneous Emphysema
• D) The Patient Has A Tracheal Injury
ANS: A)
Rationale: Crepitations Felt In The Neck Suggest The Presence Of Subcutaneous
Emphysema, Which Often Occurs When Air Leaks From The Lung Into The Soft Tissues
Following A Pneumothorax Or Rib Fracture. While Other Options Could Potentially
Contribute, The Specific Context Of Chest Injuries And Crepitations Points To An Air Leak
From The Lung.
2. A Forced Expiratory Measurement Obtained After The Administration Of A
Bronchodilator Shows An Increase In FEV1 From 60% To 80% Of Predicted. This Indicates
A:
Choices:
• A) Fixed Airway Obstruction
• B) Reversible Airway Obstruction
• C) Restrictive Lung Disease
, • D) Normal Pulmonary Function
ANS: B)
Rationale: An Increase In FEV1 Of 20% Or More After Bronchodilator Therapy Indicates
That The Airway Obstruction Is Reversible, Characteristic Of Conditions Such As Asthma.
This Suggests That The Bronchodilator Was Effective In Alleviating The Obstruction.
3. During Capnography Monitoring Of A Mechanically Ventilated Patient, You Note That
The End-Tidal PCO2 (Petco2) Has Dropped To 0 Mm Hg. This Finding May Indicate:
Choices:
• A) Hyperventilation
• B) Complete Airway Obstruction
• C) Pulmonary Embolism
• D) Decreased Lung Perfusion
ANS: B)
Rationale: A Petco2 Of 0 Mm Hg Typically Indicates That No CO2 Is Being Exhaled,
Which Is Consistent With Complete Airway Obstruction. In Such A Scenario, CO2 Cannot
Be Transported From The Lungs To The Atmosphere, Leading To This Alarming Reading.
4. An Unconscious Apneic Patient With A Full Stomach Cannot Be Orally Intubated In The
Emergency Room. Which Of The Following Would You Recommend?
Choices:
• A) Inserting An Esophageal-Tracheal Combitube
• B) Performing A Surgical Airway (Cricothyrotomy)
• C) Using A Laryngeal Mask Airway (LMA)
• D) Administering Bag-Mask Ventilation
ANS: A)
,Rationale: The Esophageal-Tracheal Combitube Is A Useful Alternative For Securing The
Airway In Difficult Intubations, Especially In Unconscious Patients. It Allows For
Ventilation Even When Traditional Intubation Fails, Especially In The Context Of A Full
Stomach Where Aspiration Risk Is Heightened.
5. While Establishing Initial Ventilatory Support Settings For A New Patient, The Most
Important Consideration Is:
Choices:
• A) Patient’s Size And Clinical Condition
• B) Patient's Age
• C) Patient's Previous Ventilation History
• D) Patient's Metabolic Rate
ANS: A)
Rationale: The Patient's Size (Height And Weight) Is Crucial For Determining Tidal
Volumes And Minute Ventilation Settings. Additionally, The Clinical Condition Dictates
Whether To Use Volume Control, Pressure Control, Or Other Modes Of Ventilation, Making
It The Primary Consideration.
6. A Male Patient Has A Lower Than Normal Mixed Venous O2 Content. Which Of The
Following Is The Most Likely Cause Of This Condition?
Choices:
• A) Fever (Hyperthermia)
• B) Anemia
• C) Sepsis
• D) Pulmonary Shunting
ANS: A)
, Rationale: Hyperthermia Increases Metabolic Demand, Leading To Higher Oxygen
Consumption And, Subsequently, A Lower Mixed Venous Oxygen Content Due To The
Body Using More Oxygen Than It Is Able To Replenish. Anemia And Sepsis Can Also
Affect Oxygen Delivery But Are Less Directly Linked To Mixed Venous O2 Content
Changes In This Context.
7. You Are Trying To Wean An Alert Intubated Patient Off Full Ventilatory Support Using
The CPAP Protocol With 40% O2. Early In The Initial Effort Her Respiratory Rate Increases
From 24 To 30/Min And You Start To Observe Some Use Of Her Accessory Muscles While
Breathing. Which Of The Following Would Be Your First Action At This Time?
Choices:
• A) Apply 5-10 Cm H2O Pressure Support
• B) Increase The Fio2 To 60%
• C) Reintubate The Patient
• D) Initiate Non-Invasive Ventilation
ANS: A)
Rationale: The Increase In Respiratory Rate And Use Of Accessory Muscles Indicate The
Patient Is Struggling To Maintain Adequate Ventilation. Applying Pressure Support Can
Provide Assistance During Inhalation, Improving Respiratory Mechanics And Comfort,
Allowing For Continued Weaning Efforts.
8. What Is The Approximate Duration Of Flow Of An Oxygen E-Cylinder At 1000 Psi
Running At 4 L/Min?
Choices:
• A) 50 Minutes
• B) 70 Minutes
• C) 120 Minutes
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