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Doctor insights on: What Is The Difference Between Ventilation And Perfusion

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What are the differences between pulmonary perfusion scan and pulmonary ventilation scan?

What are the differences between pulmonary perfusion scan and pulmonary ventilation scan?

Lung V-Q scan: Ventilation scanning involves the patient breathing in a radiotracer while perfusion scanning involves injecting the radiotracer through an iv. The procedure is done usually to evaluate the presence of absence of a pulmonary embolism (usually a blood clot) and involves comparing the radiotracer's presence in the alveoli vs. Its presence in the lung circulation. ...Read more

Breathing (Definition)

Breathing is the way we take in oxygen and expel carbon dioxide (co2) through out lungs. When our lungs expand we take fresh air in that contains oxygen and then when our lungs ...Read more


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I need to know what is ventilation perfusion matching?

I need to know what is ventilation perfusion matching?

Blood clots in lungs: It's a nuclear test to look for blood clots in the lungs. It has been largely replaced with high resolution spiral ct scans. ...Read more

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What is a ventilation-perfusion scan?

What is a ventilation-perfusion scan?

Radiological test: A ventilation-perfusion (v/q) scan is a specialized radiological lung test comparing mismatches between any part of your lung that still exchanges oxygen (affected in COPD e.g.) and any part that is not receiving blood flow. This is done through radio-tracers. A mismatch means there is a clot in that part of the lung hindering blood flow. Diseases & surgery of the lung complicate interpretation. ...Read more

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What person needs a lung ventilation/perfusion scan?

What person needs a lung ventilation/perfusion scan?

: Folks with a suspicion for blood clot in the lung. This may be due to spells of breathlessness or chest pain or both. More common if there is blood clots in the leg (phlebitis). ...Read more

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How does pneumonia affect the ventilation – perfusion ratio?

Lowering ventilation: Pneumonia decreases the lungs ability to fully expand. This decreases ventilation and has little effect on perfusion. Therefore you have a decreased v/q ratio. ...Read more

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What does ventilation-perfusion coupling refer to in regard to the lungs?

What does ventilation-perfusion coupling refer to in regard to the lungs?

V/Q mismatch= PE?: Pulmonary zones of good ventilation with good perfusion result in appropriate oxygen transport into the bloodstream. Mismatch of ventilation and perfusion results in poorly oxygenated blood (example pulmonary emboli where vascular clots prevent good perfusion to regions of optimal ventilation ---ie oxygen cannot be transported into bloodstream. ...Read more

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Why would a pulmonary ventilation/perfusion scan be performed?

Pulmonary Embolism: The main reason to perform a pulmonary ventilation-perfusion (v-q) scan is to rule out the presence of a pulmonary embolus (commonly a blood clot). There are several forms of pulmonary thrombo-embolism, but the most common situation is one of sudden onset, leading to sob. Chronic thrombo-embolism leads to development of sob over a long period and it can also be diagnosed with a v-q scan. ...Read more

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What does blood clot in the lungs (pulmonary embolus) show on ventilation perfusion scan?

Lack of blood flow: A ventilation perfusion scan is a test for a blood clot in the lungs, or pulmonary embolism. If there is a blood clot, an area of the lung will not be perfused, but will be ventilated, and therefore a mismatch will be seen. ...Read more

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Dr order pulm. Ventilation/perfusion scan for tachardyia and sob. Have normal chest x-ray, ekg, pulmonary test and blood work. Odds it's an embolism?

Odds don't count: Stastitics are only guidelines and don't apply to individual cases. A lung scan (v/q) is accurate if it is considered high probability or normal. The " gold standard" is computerized angiogram of the chest which is very accurate both to diagnose or exclude pulmonary embolism. Talk to your md. If you have no medical contraindications, I would prefer the ct angiogram. ...Read more

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Why is perfusion more important than ventlation?

Why is perfusion more important than ventlation?

Need both: Not sure what you are referring to regarding perfusion being more important than ventilation. In regards to a lung perfusion ventilation scan, a mismatch between perfusion and ventilation is abnormal and can suggest pulmonary disease. Ventilation delivers oxygen to the blood via the lungs, then perfusion (blood) delivers the oxygen to the body, so both are important. ...Read more

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Please advise what is the difference between mechanical ventilation & intubation?

Simply: Intubation is placement of a tube in the trachea (wind pipe), mechanical ventilation is the process by which a patient receives oxygen using artificial means (a ventilator). Almost always, intubation is followed by mechanical ventilation and mechanical ventilation is performed most times after intubation. ...Read more

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What is the difference between breathing loudly and snoring?

What is the difference between breathing loudly and snoring?

Ask your partner: There may be no difference to your bed partner if it is keeping them up! snoring is usually caused by the palate and uvula vibrating in the back of your throat. Noisy breathing could be related to nasal issues like allergies, a deviated septum or enlarged turbinates. ...Read more

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What is the difference between a b-pap and a c-pap breathing machine?

What is the difference between a b-pap and a c-pap breathing machine?

See below.: The CPAP provides continuous pressure throughout the breathing cycle. The bipap provides a higher pressure in inspiration and a lower pressure in exhalation. Best settings and modes are determined by overnight sleep study. ...Read more

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I want to know what is the difference between breathing through your nose or mouth?

I want to know what is the difference between breathing through your nose or mouth?

Nose is better: The main difference is that your nose is designed to warm and moisten the air before it gets to your lungs while the mouth is not. If you breathe mostly through your mouth, you will have increased loss of water from your body. Also, it is less attractive, socially. ...Read more

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What is the difference between breathing problems caused by a panic attack and asthma?

What is the difference between breathing problems caused by a panic attack and asthma?

Few differences: Asthma is a breathing out problem. Panic attacks are a breathing in problem). Asthma is relieved with albuterol inhalers, panic attacks are resolved by relaxing. Asthma is associated with allergic disease, panic attacks sometimes with anxiety/psychological disease. You can get a peak flow meter from your doctor to check your breathing when you're having an attack and/or breathing tests in office ...Read more

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Can you tell me what is the difference between breathing problems caused by a panic attack and asthma?

Can you tell me what is the difference between breathing problems caused by a panic attack and asthma?

Panic attack: Panic attack shortness of breath is psychologic and not physiologic. The shortness of breath with asthma is due to constriction of the bronchial tree diameter and increased airway resistance to air flow. ...Read more

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What's the difference between breathing and snoring?

Snoring: Breathing is essential to life. Snoring is the result of tissues vibrating during obstructive attempts at breathing. ...Read more

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What is the basic difference between breathing and respiration.....?

What is the basic difference between breathing and respiration.....?

Mechanical vs biolog: Breathing is basically the actual air movement in and out of lungs. Respiration is a biological process of transferring and using the oxygen/carbon dioxide for cellular functions/chemical processes, applying to both animals and plants. It is a rather complicated but fascinating process of life. Biology=study of life.
Have fun learning. Good luck. ...Read more

Perfusion (Definition)

Perfusion usually refers to blood flow into an ...Read more