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Doctor insights on: Nasal Potential Difference Measurement

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What are the differences in action between nasal crom and a steroid like qnasal?

What are the differences in action between nasal crom and a steroid like qnasal?

Timing of action: Cromolyn works on certain, not all inflammatory cells to stabilize their surface and avoid release of chemicals of inflammation. It only works as a preventer of inflammation. Steroid works in all phases of inflammation and nearly all types of cells of inflammation so once there is symptom steroid works and cromolyn does not. ...Read more

Dr. Jack Mutnick
1,167 doctors shared insights

Nasal (Definition)

NaSal is a nasal preparation which is a kind of ...Read more


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Could the nasal conchae also be termed the nasal meatus? What's the difference in conchae and meatus?

Could the nasal conchae also be termed the nasal meatus? What's the difference in conchae and meatus?

Nasal/sinus anatomy: The conchae are also called turbinates- scrolls of erectile tissue and thin bone that can enlarge from allergy, inflammation, etc. There are 3-4 on each side of the nose. The meatus is a space where sinuses drain; there are 3 of those. The shape of the conchae plus other nearby structures contribute to determine the shape and area of each meatus. All are important in sinus drainage and airflow. ...Read more

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Are there any differences in the different nasal allergy meds?

Are there any differences in the different nasal allergy meds?

Yes : There are several different classes of nasal allergy medications: nasal steroids, nasal antihistamines, oral antihistamines and allergy vaccine therapy. All of these are effective for nasal allergies but work through different mechanisms. ...Read more

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What is the difference between the nasal and oral medications for allergies?

What is the difference between the nasal  and oral medications for allergies?

Risk/benefit ratio: In general, nasal medicines are more effective with less risk of side effects. This is partly because they are applied only to the area that is a problem, the nose. However, some people don't like nasal sprays, and teaching is needed to use them most effectively. Oral medicines are quick and easy, but the medicine goes throughout the body, even to places it's not needed. ...Read more

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What is the difference between rhinitis and nasal polyp?

What is the difference between rhinitis and nasal polyp?

2 different entities: A nasal polyp is an inflammatory growth from the lateral wall of the nose. Rhinitis is an inflammation of the mucous membrane of the nose, for example allergic rhinitis. The two may be associated but they are totally different. ...Read more

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Is there a difference between a nasal endoscopy or rhinoscopy?

Is there a difference between a nasal endoscopy or rhinoscopy?

Yes: Anterior rhinoscopy is using light to evaluate the front of the nose. Nasal endoscopy utilizes fiberoptics in a thin hose to view the entire nasal cavity and all its complex internal anatomy. ...Read more

Dr. Liawaty Ho Dr. Ho
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How can I tell the difference between nasal polyps and a tumor?

Dr. Liawaty Ho Dr. Ho
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How can I tell the difference between nasal polyps and a tumor?

Case and biopsy: From listening to patient, examining and visualizing the mass directly plus minus imaging study- you can have some impression whether it is a benign or cancerous one. However, ultimately, a biopsy is the one that can tell you definitively whether it is a cancer or a benign tumor/polyps etc. ...Read more

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Have had post nasal drip for years, weird taste all the time. How to tell the difference between CSF and post nasal drip?

Have had post nasal drip for years, weird taste all the time. How to tell the difference between CSF and post nasal drip?

Sinusitis : Sinusitis or inflammation of the sinuses can cause headaches. Postnasal drip causes nausea, poor appetite, and weight loss. A CSF leak leaves a salty taste in the back of the throat and/or leaks clear fluid from a single nostril. The leak is worse with straining or bending over. See an ear nose and throat physician or otolaryngologist to monitor your symptoms. ...Read more

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Difference between nasal vestibular furunculosis and nasal polyps?

Difference between  nasal vestibular furunculosis and nasal polyps?

Easy answer: Nasal polyps arise from the lateral wall of the nose, lateral to the middle turbinate and represent a de novo inflammatory growth. The causes are multiple, such as bacterial infection, fungal infection, and viral infection. Although the exact etiology is still an enigma. Nasal vestibular furunculosis is an infection of the front of the nose, the nasal vestibule, and is caused by S. aureus. ...Read more

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What is the difference between nasal spray and saline drops?

What is the difference between nasal spray and saline drops?

Similar: Saline (salt water) can be administered into the nose many ways. Saline nasal sprays produce a fine mist, while drops are larger. Sometimes, nasal rinse with a neti pot or nasal sinus rinse in larger volumes to rinse out the nasal cavity is useful. An allergist or ENT can assist in the type of nasal spray/treatment most effective for each individual. ...Read more