This is a more accurate indicator of tissue perfusion. It represents the cardiac output in terms of liters per minute per square meter of body surface area. Its normal range is 2.4-4 L/min.

Correct Answer: A

Rationale: The correct answer is A: Cardiac Index. Cardiac Index is a more accurate indicator of tissue perfusion as it takes into account the individual's body surface area, providing a more standardized measure. It is calculated by dividing the cardiac output by body surface area. This normalization allows for a more precise assessment of tissue perfusion compared to just cardiac output alone. The normal range of Cardiac Index is 2.4-4 L/min/m^2. Summary: - Choice B (Stroke volume) is incorrect because it is the volume of blood pumped out by the heart with each heartbeat, not accounting for body surface area. - Choice C (Ejection fraction) is incorrect because it is the percentage of blood ejected from the heart's left ventricle with each heartbeat, not adjusted for body surface area. - Choice D (Cardiac output) is incorrect because it doesn't consider the individual's body surface area, making it less accurate in assessing tissue perfusion.

Correct Answer: A

Rationale: The correct answer is A: Heart failure. This condition occurs when the heart is unable to pump enough blood to meet the body's needs. It can result from various factors such as high blood pressure, heart muscle damage, or heart valve disorders. In contrast, B (Myocardial infarction) refers to a heart attack caused by a blockage in the coronary arteries, C (Cardiomyopathy) is a disease of the heart muscle, and D (Pericarditis) is inflammation of the pericardium surrounding the heart. These conditions may affect the heart's function but do not specifically indicate the inability to pump sufficient blood like heart failure does.

Correct Answer: A

Rationale: The correct answer is A: Deep vein thrombosis (DVT). DVT is a blood clot that forms in a deep vein, commonly in the legs. It can lead to serious complications if the clot dislodges and travels to the lungs, causing a pulmonary embolism. Varicose veins (C) are enlarged, twisted veins near the surface of the skin, not involving deep veins. Atherosclerosis (D) is the build-up of plaque in arteries, not related to vein clot formation. Pulmonary embolism (B) is a complication of DVT, not the initial clot formation in a vein.

Correct Answer: A

Rationale: The correct answer is A: Endocarditis. Endocarditis is the inflammation of the heart's inner lining, often due to an infection. "Endo-" refers to the inner lining of the heart (endocardium) and "-itis" denotes inflammation. Myocarditis (B) is inflammation of the heart muscle, pericarditis (C) is inflammation of the outer lining of the heart, and valvulitis (D) is inflammation of the heart valves. Endocarditis specifically targets the inner lining, making it the correct choice.

Correct Answer: A

Rationale: The correct answer is A: Nebulizer. A nebulizer is a device that delivers medication in the form of a fine spray into the airways, making it easier for the patient to inhale the medication and reach the lungs. It is commonly used for treating respiratory conditions such as asthma and COPD. Inhalers (B) deliver medication in a different format, through a measured dose of medication in aerosol form. Oxygen concentrators (C) provide supplemental oxygen and do not deliver medication. Peak flow meters (D) are used to measure the peak expiratory flow rate and are not used to deliver medication.