What Do You Know About V/Q Mismatch?

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Questions: 8 | Attempts: 1,292 | Updated: Mar 20, 2023

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What Do You Know About V/Q Mismatch? - Quiz

A V/Q mismatch induces one very serious condition. Can you tell us what you know about this anomaly? Do you know what's v, q and what happens after this mismatch?

Questions and Answers

1.

What does the V stand for?
- A.
  
  Veins
- B.
  
  Ventilation
- C.
  
  Varicose vein
Correct Answer
B. Ventilation

Explanation
The correct answer is "ventilation" because in the context of the question, the letter V is being referred to and asked for its meaning. Ventilation is the process of providing fresh air or circulating air in a particular space, such as a room or building. It is commonly associated with the exchange of air in order to maintain a healthy and comfortable environment.

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2.

What does the P stand for?
- A.
  
  Polycystic
- B.
  
  Pressure
- C.
  
  Perfusion
Correct Answer
C. Perfusion

Explanation
The letter "P" in this context stands for perfusion. Perfusion refers to the process of delivering blood to the tissues and organs in the body. It ensures that oxygen and nutrients are supplied to the cells, while waste products are removed. In the given options, "polycystic" and "pressure" do not relate to the concept of perfusion, making them incorrect choices.

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3.

What does it mean when we say Q?
- A.
  
  It considers the blood that reaches the alveoli
- B.
  
  It considers the blood that reaches the heart
- C.
  
  It considers the blood that can't coagulate
Correct Answer
A. It considers the blood that reaches the alveoli

Explanation
When we say "Q," it refers to the measurement or consideration of the blood that reaches the alveoli. Alveoli are small air sacs in the lungs where the exchange of oxygen and carbon dioxide takes place. By considering the blood that reaches the alveoli, we are specifically focusing on the blood that has been oxygenated and is ready to be transported to different parts of the body. This measurement helps in assessing the efficiency of gas exchange in the lungs and the overall respiratory function.

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4.

What's the measuring instrument for V/Q ratio?
- A.
  
  A ventilation/perfusion digital scale
- B.
  
  A ventilation/perfusion meter
- C.
  
  A ventilation/perfusion scan
Correct Answer
C. A ventilation/perfusion scan

Explanation
A ventilation/perfusion scan is used as a measuring instrument for V/Q ratio. This scan involves injecting a radioactive substance into the bloodstream and inhaling a radioactive gas. The scan then measures the distribution of the gas and the blood flow in the lungs, providing information about the V/Q ratio. By comparing the ventilation and perfusion images, any abnormalities in the lung function can be detected, making it an effective tool for evaluating lung diseases such as pulmonary embolism or chronic obstructive pulmonary disease (COPD).

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5.

What does a V/Q mismatch produce?
- A.
  
  Type 2 respiratory failure
- B.
  
  Type 1 respiratory failure
- C.
  
  Type 2 respiratory failure
Correct Answer
B. Type 1 respiratory failure

Explanation
A V/Q mismatch refers to an imbalance between ventilation (V) and perfusion (Q) in the lungs. In this condition, there is inadequate matching between the amount of air reaching the alveoli and the blood flow to the alveoli. This results in impaired oxygenation of the blood and can lead to hypoxemia. Type 1 respiratory failure is characterized by low oxygen levels (hypoxemia) with normal or low carbon dioxide levels (normocapnia or hypocapnia). Therefore, a V/Q mismatch is more likely to produce type 1 respiratory failure rather than type 2 respiratory failure.

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6.

What are the oxygen and carbon dioxide rates when the failure happens?
- A.
  
  They can't be kept at the same level
- B.
  
  They're the same
- C.
  
  Both carbon dioxide and oxygen leave the body within one hour
Correct Answer
A. They can't be kept at the same level

Explanation
When the failure happens, the oxygen and carbon dioxide rates cannot be kept at the same level. This suggests that there is an imbalance between the intake of oxygen and the release of carbon dioxide in the body. In a normal functioning system, oxygen is taken in and carbon dioxide is expelled through respiration. However, in the event of failure, this balance is disrupted, leading to an inability to maintain the same levels of oxygen and carbon dioxide.

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7.

Type 1 respiratory failure induces low level of oxygen in blood called...?
- A.
  
  Avixemia
- B.
  
  Hypoxemia
- C.
  
  Hyperxemia
Correct Answer
B. Hypoxemia

Explanation
Type 1 respiratory failure is characterized by inadequate oxygenation of blood due to impaired gas exchange in the lungs. This leads to a low level of oxygen in the blood, a condition known as hypoxemia. Hypoxemia can result from various respiratory conditions such as pneumonia, acute respiratory distress syndrome (ARDS), or pulmonary edema. It can cause symptoms like shortness of breath, rapid breathing, confusion, and cyanosis. Prompt medical intervention is necessary to address the underlying cause and improve oxygenation.

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8.

If a v/q mismatch happens, what happens to lungs?
- A.
  
  The right lung only gets oxygen and enough blood
- B.
  
  The left lung only gets oxygen and enough blood
- C.
  
  Some parts of it receive oxygen but not enough to absorb it
Correct Answer
C. Some parts of it receive oxygen but not enough to absorb it

Explanation
In a v/q (ventilation/perfusion) mismatch, some parts of the lungs receive oxygen but not enough to absorb it. This means that there is an imbalance between the amount of air reaching the alveoli (ventilation) and the amount of blood flowing through the capillaries surrounding the alveoli (perfusion). As a result, certain areas of the lungs may not receive sufficient blood supply to effectively exchange oxygen and carbon dioxide, leading to impaired gas exchange and decreased oxygen absorption.

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Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

Current Version
Mar 20, 2023

Quiz Edited by
ProProfs Editorial Team
Mar 02, 2016

Quiz Created by
Snoopye

What Do You Know About V/Q Mismatch?

What does the V stand for?

What does the P stand for?

What does it mean when we say Q?

What's the measuring instrument for V/Q ratio?

What does a V/Q mismatch produce?

What are the oxygen and carbon dioxide rates when the failure happens?

Type 1 respiratory failure induces low level of oxygen in blood called...?

If a v/q mismatch happens, what happens to lungs?