Understanding Oxygen Use and Risks in Critical Care

What is the primary reason for using supplemental oxygen in acute conditions?

• To enhance cellular respiration

• To prevent hypoxia

• To increase blood pressure

• To reduce heart rate

What is hyperoxia?

• A condition of low oxygen levels in tissues

• A condition of high oxygen levels in tissues

• A condition of normal oxygen levels in tissues

• A condition of fluctuating oxygen levels in tissues

How does hyperoxia lead to oxygen toxicity?

• By increasing reactive oxygen species

• By decreasing blood flow

• By reducing ATP production

• By lowering blood pressure

What are reactive oxygen species?

• Stable molecules with paired electrons

• Unstable molecules with unpaired electrons

• Molecules that decrease oxidation

• Molecules that increase ATP production

Which phase of oxygen toxicity involves irreversible changes?

• Initiation

• Inflammation

• Proliferation

• Fibrosis

What is a major risk factor for oxygen toxicity?

• Low levels of reactive oxygen species

• Short duration of oxygen exposure

• High total dose of oxygen

• Low atmospheric pressure

What condition can mimic acute lung injury caused by other factors?

• Pneumonia

• Asthma

• Chronic obstructive pulmonary disease

• Hyperoxic acute lung injury

What is the primary concern when delivering high levels of oxygen?

• Enhancing cellular respiration

• Increasing heart rate

• Causing hyperoxia

• Reducing blood pressure

Why is it important to monitor oxygen levels in patients?

• To increase heart rate

• To reduce cellular respiration

• To prevent oxygen toxicity

• To ensure high blood pressure

What should be considered when a patient has high SpO2 levels?

• Increasing atmospheric pressure

• Maintaining current oxygen levels

• Reducing oxygen delivery

• Increasing oxygen delivery