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Doctor insights on: Do I Have To Get Some Blood Tests Before Doing A Sweat Test

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Do I have to get some blood tests before doing a sweat test?

Do I have to get some blood tests before doing a sweat test?

No: Sweat chloride testing at an accredited testing center is the standard way to diagnose cystic fibrosis. You do not have to get any other tests first to make the results of the sweat chloride test valid or meaningful. However, if your symptoms suggest cystic fibrosis, you might have had several tests first, including a chest x-ray and possibly blood work for pneumonia and/or diarrhea. ...Read more

Dr. Tiffanie Noonan
29 doctors shared insights

Sweat Chloride Test (Definition)

The sweat chloride test is the first line test for diagnosing cystic fibrosis. The results may be abnormal (diagnosis of CF), normal (CF very unlikely) or intermediate (possible CF, needing further testing). In young babies the intermediate range is very broad, because the sweat ...Read more


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Do I have to get some blood tests before doing a thoracentesis?

Do I have to get some blood tests before doing a thoracentesis?

Yes: A doctor will usually want a few simple blood tests to make sure you do not have some potential for bleeding prior to a thoracentesis. It depends a lot on what medications you are currently taking, especailly blood thinning medications and your general level of health at the time of the thoracentesis. A protime test and a blood count are typical tests to do prior. ...Read more

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Do I have to get some blood tests before doing a thoracotomy?

Yes: A thoracotomy is a specialized procedure to get into your chest. Coagulation tests should be acceptable to minimize the risk of bleeding. Usually your lung function should be available if high risk morbidities (risks) & a baseline oxygenation (oxymetry). Unless a risk for cardiac problem that is enough. ...Read more

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Do I have to get some blood tests before doing a pancreaticoduodenectomy?

Do I have to get some blood tests before doing a pancreaticoduodenectomy?

Yes: This is a relatively major surgery and will require a few preoperative tests, at minimum a blood coagulation test and usually a chest xray and abdominal ct scan. ...Read more

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Do I have to get some blood tests before doing a brachytherapy?

Do I have to get some blood tests before doing a brachytherapy?

Simple blood test: Avery simple blood test- i.e. Cbc and pt/ptt most likely. ...Read more

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Do I have to get some blood tests before doing a liver biopsy?

Do I have to get some blood tests before doing  a liver biopsy?

Yes: Most doctors will want blood tests indicating your current blood counts (red and white blood cells, platelets) and making sure you are not at risk for bleeding excessively during the test. The may want liver function tests as well, or even kidney function tests. ...Read more

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Do I have to get some blood tests before doing an oophorectomy?

Do I have to get some blood tests before doing an oophorectomy?

Elective procedures: Elective surgical procedures, like a planned and scheduled oophorectomy, require less blood work than emergency procedures. The type of blood work is usually determined by both your surgeon and anesthesia provider, and depends on your age and other health issues. So answer is, depends on a few things. If you have recent blood work from your primary doc, share it. ...Read more

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Do I have to get some blood tests before doing an immunization?

Do I have to get some blood tests before doing  an immunization?

No ReasonTo Do SO: Immuniztions have tremendous safety records and require no preliminary tests for any reason. ...Read more

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Do I have to get some blood tests before getting a keratectomy?

Do I have to get some blood tests before getting a keratectomy?

Keratectomy: Depends on your health, or if you have medical conditions like bleeding disorders. Typically blood test are not ordered. However, if your ophthalmologist is asking for test, i suggest you do them. There is something called "clinical acumen" "clinical skills" that come with experience. These are non-written rules aka the "art of medicine.". ...Read more

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Do I have to get some blood tests before doing a botox injections?

Do I have to get some blood tests before doing a botox injections?

Unlikely: Depends on the physician and the indication for the botox. For most cosmetic Botox injections, no lab work (blood tests) are needed. ...Read more

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Do I have to get some blood tests before doing a puva treatment?

Do I have to get some blood tests before doing a puva treatment?

Phototherapy: Puva, means psoralen ultraviolet a. This is a treatment for certain skiin diseases, like psoriasis or vitiligo, where a chemical made from a plant, called psoralen, is ingested or applied to the skin rash, and then the patient is exposed to certain kinds of light, called ultraviolet light a. Some dermatologists check the patients liver , and for lupus, by doing a blood test before puva is started. ...Read more

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Do I have to get some blood tests before doing a lumbar puncture?

Do I have to get some blood tests before doing a lumbar puncture?

Depends on question: Possibly, depending on why the LP is being done. Some tests require comparing the concentration of chemicals in the blood to that in the csf. Also, sometimes people need to make sure their blood is clotting properly before doing the lp, so as to reduce the risk of bleeding. ...Read more

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Do I have to get any blood tests when I go for a mammogram?

Do I have to get any blood tests when I go for a mammogram?

No: Mammogram can result in an ultrasound and possibly even a biopsy which some institutions do the same day, but usually this is scheduled for another day if it is deemed necessary. No blood test is standard in preparation for a mammogram. ...Read more

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Do I have to get some blood tests before doing a lumbar MRI without dye?

Do I have to get some blood tests before doing  a lumbar MRI without dye?

No: Not unless you need anesthesia. Then you will need a full history and physical, and whatever pre-anesthetic testing your anesthesiologist sees fit to ensure your safety. ...Read more

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Do I have to get some blood tests before doing a lumbar MRI without dye?

Do I have to get some blood tests before doing a lumbar MRI without dye?

No: There is no need for blood tests before a non-contrast mri. However, if there is a chance that contrast might be used during the test, then it's easier to have a simple kidney function blood test before the MRI scan rather than having to get out of the scanner, have the test and then have to reschedule a scan with contrast. ...Read more

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Do I have to get some blood tests before doing an endometrial ablation?

Do I have to get some blood tests before doing an endometrial ablation?

Endo Ablation: Endometrial ablation is a way to destroy the endometrium (lining of uterus), which sheds each month. Ablation is a technique that can be used in place of hysterectomy, but after you complete your family. It is important to be sure you do not have cancer, so biopsy more important than blood tests. Ultrasound or MRI helpful to make sure of cause for abnormal bleeding. Good luck. ...Read more

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Blood Tests (Definition)

Blood is usually drawn from your ...Read more