Prescribing And Administering Oxygen And Performing Pulse Oximetry

10 Questions

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Oxygen Quizzes & Trivia

This Short test of 10 questions will be similar to the questions that will appear in your exams. This will test the level of knowledge you have acquired from watching the video. If there are any areas you are not sure of or perform badly in it is important you revist them. Remember-the best way to retain clinical knowledge is to go out onto the wards and experience and apply it in reality and under supervision.


Questions and Answers
  • 1. 
    An 80 year old man comes to the emergency department with severe shortness of breath, he is exhibiting an obvious tremor and appears distressed and unsure of where he is or who he is. His pulse rate is 94bpm. What is his target oxygen saturation?
    • A. 

      92-98%

    • B. 

      88-92%

    • C. 

      Unknown until ABGs taken

    • D. 

    • E. 

      Depends on the presence of asterixis

  • 2. 
    The same man's ABGs come back. They show that he is severely hypercapnic and acidotic. How would you treat him?
    • A. 

      100% administered oxygen via non-rebreather

    • B. 

      Treat with the lowest concentration of oxygen required to maintain target saturation

    • C. 

      Immediately begin non-invasive ventilation

    • D. 

      Use no oxygen at all

    • E. 

      Wait for a senior colleague before proceeding

  • 3. 
    You are in A&E. A 20 year old woman is brought in from a recent RTA. There is a deep laceration running the length of her left leg. She is fully conscious and in severe pain. What Oxygen treatment is indicated assuming the airway is clear?
    • A. 

      None

    • B. 

      15L/min non-rebreather

    • C. 

      Venturi with 60% filter

    • D. 

      4L/min nasal cannulae

    • E. 

      Monitor her oxygen saturation with oximetry and titrate if required

  • 4. 
    A 35 year anaemic old woman in hospital with bronchiectasis shows dropping oxygen sats. ABGs come back and her CO2 levels are normal. You’re superior tells you to prescribe oxygen. What do you specify?
    • A. 

      24% venturi

    • B. 

      28% venturi

    • C. 

      40% venturi

    • D. 

      Nasal Cannulae 4L/min

    • E. 

      Non-rebreather 15L/min

  • 5. 
    • A. 

      Cyanide poisoning

    • B. 

      Poor peripheral circulation

    • C. 

      Carbon monoxide poisoning

    • D. 

      Emergency situations

    • E. 

      Patients with carbon dioxide retention

  • 6. 
    The following are situations in which you should use a non-rebreather mask:
    • A. 

      Cardiac arrest

    • B. 

      Facial trauma

    • C. 

      COPD patients

    • D. 

      Oxygen toxicity

    • E. 

      Acute respiratory episode

  • 7. 
    A patient’s breathing has become noticeably shallow and at a severely reduced rate, his latest ABG results show high arterial CO2 saturation, acidosis and hypoxaemia. How should he be treated?
    • A. 

      Non-rebreather mask 15L/min

    • B. 

      Lowest concentration of inspired oxygen to maintain O2 sats with non-invasive ventilation

    • C. 

      Lowest concentration of inspired oxygen to maintain O2 sats

    • D. 

      Venturi mask with 24% filter

    • E. 

      No oxygen administered

  • 8. 
    The following is a/are danger(s) with Nasal Cannulae:
    • A. 

      Mucosal Dermatitis

    • B. 

      Ear pressure sores

    • C. 

      Carbon Dioxide re-breathing

    • D. 

      Non-adherence

    • E. 

      Oxygen toxicity

  • 9. 
    Which of the following is/are not true:
    • A. 

      Venturi masks can be used in non-COPD patients to titrate a correct dose

    • B. 

      Nasal cannulae are used at flow rates of up to 6L/min

    • C. 

      Humidifiers reduce the risk of nasal infection

    • D. 

      Pure water should not be used in a humidifier

    • E. 

      If a patient is carrying their own oxygen mask the mask should be used

  • 10. 
    • A. 

      Non-rebreather prevents rebreathing using a one way valve

    • B. 

      Nasal cannulae prongs curve upwards to the roof of the nasopharynx to slow oxygen before it reaches the trachea and thus prevent mucosal drying

    • C. 

      Pure water in a humidifier can precipitate bronchoconstriction

    • D. 

      Oxygen should be prescribed in an emergency

    • E. 

      Some normal, healthy elderly individuals can have arterial oxygen saturation values of