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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

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Is there a difference between epinephrine and albuterol action on breathing?

Is there a difference between epinephrine and albuterol action on breathing?

Not much different: Primatene mist previously available without a rx was just inhaled epinephrine. Overuse was associated with bad side effects like stroke and heart attack. Albuterol has less pronounced effects on the heart so its safer. Primatene has been taken off of the retail market because of the problems. Both are bronchodilators. ...Read more

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Can a Dr tell the difference between bronchitis and pneumonia by listening to your breathing with a stethescope?

Can a Dr tell the difference between bronchitis and pneumonia by listening to your breathing with a stethescope?

Not very well: It's possible to get clues for and against pneumonia with a stethoscope, and some doctors who are true experts with the stethoscope and physical exam of the chest are more likely to tell accurately. But almost always a chest xray or other imaging (e.g. CT scan) is the only way to know for sure. ...Read more

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How can you tell the difference between cardiac chest pain, muscular chest pain, and angina? I'm 18 been having chest pains for a while. Breathing fine

How can you tell the difference between cardiac chest pain, muscular chest pain, and angina? I'm 18 been having chest pains for a while. Breathing fine

Chest pain: Describe your chest pain in details: Location, nature (sharp, dull, crushing etc), does it move to other areas of your body such as your neck, chin or your arm, other associated symptoms such as nausea, hear burn, sweating, palpitation and one of the physicians can explain the chest pain to you ...Read more

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Tell me the difference between the plastic thing they put in your nose, an oxygen mask, and a breathing tube?

Tell me the difference between the plastic thing they put in your nose, an oxygen mask, and a breathing tube?

Levels of help: Each can be used to give a person oxygen. The prongs in the nose are nasal cannula, the mask delivers a higher concentration or oxygen and the breathing tube does the highest. That last intervention, called intubation, is also a way to completely breathe for a person. The intensity of the patient's need determines which is appropriate for a given case. ...Read more

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Help please? What is the difference bettween breathing and respiration?

Help please? What is the difference bettween breathing and respiration?

Breathing / respir..: They can be the same but if you want to be technical breathing is the physical action of moving air in and out while respiration refers to the actual exchange of oxygen and carbon dioxide between blood and air. ...Read more

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Is there a difference in the breathing sounds of someone with croup compared to pertussis?

Is there a difference in the breathing sounds of someone with croup compared to pertussis?

Breathing sounds: With severe croup, you may hear stridor, which is an inspiratory sucking or squeaking sound. This is a sign of severe tracheal narrowing and warrants immediate medical attention. With pertussis, there are many coughs in a row (>5) which makes it hard to breath in between. Sometimes there's a whooping sound after the cough attack. For both conditions, the child should be evaluated. ...Read more

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Suffer from blood pressure on lisinopril 25 mg notice a difference in my breathing lately should I be concern?

Suffer from blood pressure on lisinopril 25 mg notice a difference in my breathing lately should I be concern?

Maybe: Some get a chronic dry cough from ace inhibitors, which is a known side effect. However, breathing changes should be evaluated by your dr or a cardiologist to be sure it is not due to fluid overload, worsening heart or lung function or other process. ...Read more

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While I'm awake does lying on my back or my belly make any difference to breathing that tells if I have sleep apnea prior to sleep studu?

While I'm awake does lying on my back or my belly make any difference to breathing that tells if I have sleep apnea prior to sleep studu?

Probably not: Probably not so much while you are awake. That is why we assess for sleep apnea with an overnight sleep study to monitor your breathing while you are asleep. ...Read more

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In law in stage IV RCC with multiple metasises all cancerous in multiple bones and organs We have noticed a difference breathing and mood. What's next?

In law in stage IV RCC with multiple metasises all cancerous in multiple bones and organs We have noticed a difference breathing and mood. What's next?

Comfort: Whatever measures to keep him comfortable. Narcotic pain medicines (prescriptions needed) for pain. Addiction is irrelevant at this stage. The maim object is his comfort. Hang in there. ...Read more

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Why am I still have trouble breathing after finishing swimming? Is it chlorine related? Took albuterol but haven't noticed difference yet.

Why am I still have trouble breathing after finishing swimming? Is it chlorine related? Took albuterol but haven't noticed difference yet.

Asthma: You should have a spirometry test with an allergist or pulmonologist to see what proper inhalers you need, the albuterol prior to exercise may not be enough. ...Read more

Perfusion (Definition)

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