Questions tagged [test]

This tag should be used for questions about Biomedical tests used in diagnosis of health conditions.

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59 views

Are false positives from Cellex’s Coronavirus antibody test systemic?

The FDA just approved the first antibody test for the Coronavirus, made by Cellex. The test has a significant false positive rate though (see here). Now for a lot of tests, false positives can be ...
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281 views

Is South Korea doing “random” testing to combat covid-19 epidemic?

It is well-known that South-Korea has developed a powerful system of drive-through testing allowing them to test hundreds of thousands of person in the past two months. I was wondering whether the ...
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Why is the US not implementing large scale random Covid-19 testing to isolate asymptomatic people? [closed]

For this question, we will define surveillance as large scale random Covid-19 testing. It is my understanding that: surveillance enables the sorting of asymptomatic patients to be immediately ...
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Is it possible that COVID-19 virus exist in a human body, but be absent from samples taken from nose and back of throat?

As specified in this link, COVID-19 tests start with taking samples from the nose or back or throat of people. Based on growth rate of this disease, I thought what if those samples are not positive (...
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Can the Chinese or S Korean COVID approaches be implemented in the US (or Europe)? [migrated]

The "Daily" NY Times podcast for 3/12/20 described two effective management schemes for handling the epidemic. Briefly: Chinese: Check everyone's temperature frequently on a massive scale. Track ...
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Can widely-accessible/universal testing for Coronavirus (COVID-19) benefit the health-outcome of an *individual*?

(I am not a clinician, so it's quite possible I am missing something obvious.) Tried but failed to explain to someone (who is used to routine swab/culture for a sore throat, as well as diagnostic ...
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1answer
26 views

What is the best protocol and criteria or policy for COVID-19 novel coronavirus testing?

What is the best protocol and criteria or policy for COVID-19 novel coronavirus testing? During early U.S. infections, the criteria have been stringent due to limited test availability. As tests ...
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72 views

Can the capacity for COVID-19 tests be amplified by testing multiple samples mixed together and testing each only if positive?

If I understand it right, the following steps are to be taken into account: Taking the sample. -for the proposed method more samples would have to be taken. Transporting the sample -more samples ...
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1answer
173 views

Is there a way to test for covid 19 after recovery?

I had symptoms that could have been corona symptoms last week. Unfortunately the testing capacity in my country (Germany) is not sufficient to test every person with symptoms at the moment, so only ...
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1answer
45 views

Which tests for Coronavirus/COVID19 are available and why seem they be so different?

Lately I'm reading about the good Coronavirus-Tests in South Korea, the faulty tests in the USA and the tests in Indonesia which are according to some Singapore newspapers not even working. I wonder ...
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Why are people with COVID-19 symptoms being denied tests in the US?

I have heard several times now, from both people I personally know and from others who have posted their stories online that they do not qualify for COVID-19 testing. From the stories I have heard, ...
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Pandemic: what is the term for the phenomenon of diffusion of tests and the spreading of the virus itself?

Context: from the "discovery" of the virus to its spreading Before the discovery of sars-2 people died from sars-1, flu or pneumonia. On the one hand, we have a new, previously unknown virus that is ...
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74 views

Having tested positive for COVID-19, will future tests be positive?

The World Health Organization indicates the COVID-19 genome is detected in assays. Once a patient tests positive, is there any reason not to expect that future instances of the same assay will result ...
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18 views

Tilt table test and beta blockers

Is tilt table test indicative with beta blockers for dysautonomia diagnosis? Or is it require drug withdrawal?
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114 views

Is there any figure about the accuracy of COVID-19 tests? [duplicate]

Recently I saw the local media (Romania) presenting a case that was initially considered COVID-19 positive and two subsequent tests led to negative results. As far as I know no official bothered to ...
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What is the range of times for fasting for glucose and cholesterol/lipid tests?

I have been reading references on the Internet about the fasting times before getting a blood test for glucose and cholesterol/lipid, and they all indicate at least 8 hrs for glucose and 10-12 hrs for ...
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135 views

Technology prospects for genome sequencing at home and data protection

Ever since the end of the Human Genome project we have been witnessing the steady advance of genome sequencing technology and the decline of the price required to perform it. This lead to the advent ...
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1answer
157 views

What is the “best” or most accurate way to measure bodily hydration?

We all know that there are important benefits to good hydration. No question there. I recently heard about a study (unfortunately I didn't catch the author's name) concluding that water is not close ...
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53 views

Are blood pressure numbers recorded during an office visit really meaningful?

On a recent visit to my primary care doctor the staff did the perfunctory BP reading. I had just sat down a few seconds prior. The reading was done only once. Is such a reading at all meaningful? I ...
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37 views

How often is a microscope used

I am planning on studying Graduate Entry into Medicine (4 years instead of 6 for people that already have a degree) in the UK. Microscopes really irritate my eyes. I think in the UK we still have to ...
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1answer
34 views

Is there a convenient self test for Glaucoma?

I was identified as a glaucoma suspect and told to get rechecked for glaucoma annually. Knowing that glaucoma can move more quickly than that I was spooked and wound up creating my own self test. If ...
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34 views

Is there an inexpensive test (IE: perhaps a form of litmus paper?) for keeping tabs on oral pH at home?

My initial research into the effect of oral pH on health I came across an article that suggests that using fluoride products in an acidic environment has many negative effects on health and that 32% ...
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324 views

What is the correct way to use the pinch test for dehydration?

My understanding is that the test works by pinching the back of your own hand for two seconds, then letting go. If the pinch "immediately" returns flat you are not dehydrated but if it doesn't, you ...
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33 views

Can two different medications in the same bottle contaminate one another.

Last week, I went to my pain control doctor, I came up positive for an opiate I do not take. The gal who works for me, asks Me all the time if sheshe can put her pills in my pill bottle. We do manual ...
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42 views

Is there a way to measure allergy to tablet/pill ingredients?

It looks like I have some kind of allergy to tablets/pills. It doesn't matter which type I take (I used to take mainly vitamins). If I take some, the result is vary from bearable sickness (for 2 days)...
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44 views

Online Genetic Test Repositories

I've found out that NCBI's Genetic Testing Registry database holds quite a large collection of genetic/genomic tests available. However, it is a database where producers/researchers submit their ...
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194 views

How would I know whether I am lactose-intolerant? Are there any tests?

I suspect that I might be lactose-intolerant, but I don't know how to tell. Can I just see a doctor and get tested, or do I have to live with the assumption? If there are any standardized tests, how ...
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1answer
48 views

How well can we test for deadly reactions to a drug, like anesthetics for an operation? [closed]

Since I still hear about people dying from adverse effects of anesthesia, prescription drugs, and clinical trials, we obviously don't have a perfect ex vivo test for adverse reactions to arbitrary ...
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127 views

What medical tests a man should take regularly to check for common health issues?

What medical tests should a man living in a relatively developed area take regularly to check for most common diseases? I'm interested in monthly and yearly basis.
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67 views

What contagious diseases can be diagnosed by x-ray test on chest?

I'm going to work in a pasta manufacturing company/factory. Egyptian law states that I must not catch any contagious diseases to be able to work there. I was asked to do a chest x-ray test. The ...
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89 views

How are Sensitivity/Specificity determined for tests in mental health?

Originally the question was How are Sensitivity/Specificity determined for the first test available for a disease? but I narrowed it down a bit since it seemed to be too broad. Given that measuring ...
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22 views

What are basic checks to be done yearly [closed]

I am a reasonably healthy 47 yo male. Not hypochondriac. I am wondering which basic medical tests should be performed, and in which cycle. I am thinking about tests per se (blood, urine,...), ...
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1answer
56 views

How and where to test for organic mercury levels?

I tried to find information about this online but unfortunately couldn't find anything besides more or less serious-looking articles explaining the different kinds of mercury poisoining, etc... I'm ...
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887 views

EverlyWell - legit?

EverlyWell is a lab testing startup. I'm looking at their food sensitivity test, didn't find a whole lot of independent info online (other than blogger reviews that were paid by the company). Is it ...
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Lactase quantity test?

Is there a way to reliably test the quantity of lactase enxymes in a solution? For example, if I were to culture multiple bacterial species which produce lactase. Is there a way to count the lacyase ...
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97 views

is 1.319 IU/ML Helicobacter Pylori IGG normal?

Doctor suggested me H-pylori Stool test & now I have the report which indicates: Test Name:Helicobacter Pylori IgG Result:1.319 IU/ML Normal Ranges: < 0.9 --> Negative 0.9-1.0 --> ...
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What are the testosterone tests that I can take to prove that my low libido is really a testosterone problem?

I understand that ( correct me if I am wrong) the Sex Hormone Binding Globulin ( SHBG) test is one of the tests that can be used to evaluate one's libido. The sex hormone binding globulin (SHBG) ...