Of note, reference ranges vary with gender and age. On average, women have higher values than men, and values in both genders increase with age. On each CCC report, the reference range listed will be tailored for the patient's gender and age.

TSH is a test to measure how much Thyroid Stimulating Hormone your pituitary gland is producing. The TSH tells your thyroid to produce hormones. The higher the number, the less your thyroid is working. A properly working thyroid measures .35 to 5.5 for someone who has never been diagnosed with Thyroid Cancer. If you have been diagnosed, please refer to your health care provider for your goals. Medications for your thyroid will alter the TSH levels in your blood. See similar questions...

noted above, when screening outpatients, a normal NTproBNP effectively rules out CHF. In this population, an elevated NTproBNP would dictate follow-up testing with more definitive (specific) tests for CHF. Probably not. Even though a normal value still rules out CHF very effectively, a mildly elevated value may well be unrelated to the acute episode. See similar questions...

The NTproBNP assay has excellent precision. If we were to run the same sample once daily for many days, the variation in the results would be less than 10%. That is, a sample with a value of 1000 pg/mL would be measured as 900-1100 pg/mL. However, there's a large amount of physiologic, intra-individual variation. As a result, many experts recommend that changes of less than 2-fold not be considered significant. See similar questions...

The National Cholesterol Education Program's latest Adult Treatment Panel III (ATP III) published the following revised guidelines for optimal cholesterol levels: It is estimated that 52% of all Americans (98 million) have total blood cholesterol levels above 200 mg/dL and 20% of American adults have a cholesterol level greater than 240 mg/dL (20%). See similar questions...

Does splenda cause cancer? Find out the answer in this FAQ about the risks of consuming the artifical sweetener, Splenda. Leukemia is a cancer that has many types. In this article, the different types of leukemia are explored and the characteristics of each are described. Most people recognize a perisistant cough as the most common symptom of lung cancer. People need to also be aware common symptoms of lung cancer that most people don't know about. See similar questions...

Your ability to resume presurgery levels of activity depends on your physical condition, the nature of the activity, and the type of bariatric surgery you had. Many patients return to normal levels of activity within three to six weeks of surgery. Back to Top See similar questions...

The volume of TV Ears works independently from the volume of the television set. Family members can set the TV volume at any level (loud, low, and muted) while TV Ears user(s) can listen at their own comfortable level. However , when using audio outs and the option to choose between fixed or variable on audio out ports is not available on your TV, volume on both headset and TV will go up the same. This is also true if you are using the power microphone. See similar questions...

Unfortunately, bilirubin is not like blood pressure or cholesterol, where you can look up what "normal" is, and then compare your baby's bilirubin level to that normal value. It's much more complicated. A very wide range of bilirubin levels is considered normal in the first week of life for healthy term newborn babies. This is because the normal level changes over time as the baby matures during that first week. See similar questions...

Cortisol levels are higher in adults than children and levels fluctuate throughout each 24 hour period, so tests must account for the time of day. Cortisol concentrations are highest in the early morning around 6 – 8 a.m. and they are also elevated after exercise (a normal part of your body’s response to exercise). The lowest levels are usually around midnight. According to the Medline Encyclopedia, normal levels of cortisol in the bloodstream at 8:00 a.m. are 6-23 mcg/dl. See similar questions...

All clinical laboratory tests must define a normal range that best distinguishes those with disease from those without. Depending on what range is used to define normal will determine how many people with disease will fall into the normal range, and conversely, how many people without disease will fall into the abnormal range. See similar questions...

The normal range for the "intact" PTH assay within the normal population with functioning kidneys, is 10-65 pgm/mL. It has been learned that the ESRD patient population is associated with much higher levels of "intact" PTH assay values. The broad, somewhat arbitrary "intact" PTH range of approximately five times normal or 100-300 pgm/mL has been used as a rough target for PTH management in the ESRD population. See similar questions...

Based on what I've been able to learn about thyroid hormones, there seems to be more of a complementary relationship at work. TSH stimulates production of T3 and T4. T4 is the "prohormone", the storage form that comprises the majority of thyroid hormone in the body at any time. It has two iodine molecules and lasts 14 (? or longer, not sure) hours in the body. T4 gets broken down to T3 (by the removal of one iodine in an enzymatic reaction in cells). T3 lasts a much shorter time. See similar questions...

The prohormone is proBNP, which is cleaved into two fragments upon release from cardiac muscle cells: Even though NTproBNP is physiologically inactive, its levels are highly correlated with BNP levels. Most experts agree that both peptides offer similar diagnostic information, but there are two differences to note. Second, the two assays have different "cross-reactivities" with the therapeutic drug nesiritide (Natrecor), which is, in fact, recombinant BNP: See similar questions...

All NTproBNP assays are the same. You can read any reference in the literature, and the analytical results will be directly transferable to BIDMC. Second, from the practical perspective, we already have the instrumentation for NTproBNP. It's available on both the east and west campuses, and our techs are already proficient on it. See similar questions...

Establishing the cause of shortness of breath in the ED, for example distinguishing between CHF and COPD. For an excellent overall review of the literature on NTproBNP (and BNP), please see Munagala et al, Curr Probl Cardiol, 2004:29:707-769. See similar questions...

NTproBNP (and BNP) have rapidly become widely used cardiac markers because they have excellent predictive values: When used to screen for CHF in an outpatient setting, the negative predictive values are reported as 98-99%. That is, a negative value can rule out CHF with a high level of certainty. See similar questions...

Many authorities agree that NTproBNP (or BNP) should be measured no more often than once per week in any given patient. Real changes related to pathophysiology or therapy require time to occur. Although serial values can be very important, the cycle time is very different from cardiac troponins and CK-MB. Renal failure causes mild elevations in NTproBNP (up to 300-500 pg/mL) in NTproBNP (Januzzi et al, PRIDE study, in press). See similar questions...

Yes - if the only reason for infertility is the high prolactin level. There are many causes of infertility, but if high prolactin is the only reason, lowering prolactin to normal results in the same chances for pregnancy as the general age-matched population (fertility declines with increasing age, especially after 32 years). See similar questions...