Doctor insights on:
How Accurate Are C4a Blood Test Levels
How reliable are blood tests that look for monoclonal gammopathy in elevated ImM levels ? Are false negatives possible?
Accurate: We pathologists are focused on labs. In testing for B12 deficiency, we're looking largely at the ability to absorb it, and perhaps at its absence in the diet (even modest vegetarians are prone to be low). A non-fasting serum B12 in the normal range would reassure me and i'd not ask for a repeat fasting. ...Read more
It depends: What is your idea of "accurate"? The lab test results need to be interpreted in the context of the clinical condition. Different tests have different sensitivity, specificity and predictive values. These characteristic vary with the population under consideration, e.g., the HIV screening tests have different performance when used on drug addicts vs. Observant nuns. ...Read more
Saliva cortisol tests are abnormally low. Serum cortisol tests are normal. Dr says i don't need an acth stim test due to serum results. Agree?
Yes: If your saliva cortisol tests are low, then you have adrenal insufficiency. Acth stim test will only help determine if the cause is in the adrenal glands, pituitary gland or hypothalamus. Without other hormonal abnormalities or abnormal levels of sodium or potassium, this test is generally not needed and treatment for the adrenal insufficiency can be done. ...Read moreSee 1 more doctor answer
Is there a more accurate way to detect magnesium&calcium levels since 99% are intracellular and only 1%in blood.Sounds serum levels are not reliable
YES! : Good question. One can measure intracellular magnesium levels. The easiest is red blood cells, which is ok for mag but not so much for calcium. Even better is white blood cell mag. But again not good for calcium. The best is levels in epithelial cells from a scraping done under your tongue but it is pricey- see http://www.Exatest.Com/ , the website of the only lab i know that does this test. ...Read moreSee 1 more doctor answer
How rare/common is lab error when hCG blood levels are drawn? (pregnancy related; no other hCG producing issues).
Usually very rare: If done in reputable labs, margin of error is small. If still having a doubt better repeat it. ...Read more
Can bloods test for all neurotransmitters to see if levels are accurate ? Which is more reliable blood or urine ?
No: No, the world isn't there yet. Maybe someday in the distant future, but life is actually much, much more complex than that. There are many different neurotransmitters, that do different things in different parts of the brain and body. They are not independent, but may work together, so that their levels and effects are likely different in various parts of the brain and body, etc... ...Read more
How acurate are at home hemoglobin monitors ? Can i rely on this monitor to show accurate hemoglobin levels?
See below: These are only moderately accurate but give you a fairly decent idea of your hemoglobin for instance if it should drop suddnley that would be significant. ...Read more
No test is 100%: Accurate. Home pregnancy tests are generally accurate if performed correctly and about two weeks after a missed period. Blood tests may be positive sooner. All lab tests have false negatives and false positives and the test results need to be interpreted in the clinical context. ...Read more
I had blood test & the results are as follows INR 1.12
APTT ratio 1.16
Beta-2 Microglobulin 1.50mg/L. Can you tell me if they are normal?
Is it possible to get instantaneous blood cholestrol readings doing strip tests similar to strip tests done for checking blood glucose levels?
Instant cholesterol : I am not aware of thatGet a more detailed answer ›
Are the results of serum calcium test automatically corrected for albumin? 10.4 calcium 4.9 albumin gives me 9.68 if not calculated.
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