Questions tagged [blood-tests]

Questions about tests of the blood that help to estimate the component(s) in it.

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25 views

If an HIV test was done using a chemiluminescent microparticle immunoassay (CMIA), does it mean it screens for HIV 2 and/or is a 4th generation test?

If an HIV test was done using a chemiluminescent microparticle immunoassay (CMIA): does it mean that it screened for HIV 2 and/or is a 4th generation test? On http://www.uphs.upenn.edu/bugdrug/...
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Can certain medications cause false positives for COVID-19?

I was told by some colleagues at work that certain medications if they were taken by a person can cause antibody COVID-19 tests to test positive, is it possible ? If so how is that possible ?
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DIY hypernatrimia test

Is there a reliable, accessible blood test kit that can be administered at home to monitor hypernatrimia ? I understand that because sodium does not produce colored compounds, serum sodium cannot be ...
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Is low immature reticulocyte fraction after an acute hemolytic crisis normal?

All following data are theoretical and not real: A patient had a hemolytic crisis without anemia proven by elevated reticulocytes, elevated unconjugated bilirubin and normal hemoglobin and erythrocyte ...
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115 views

Is it possible to have an autoimmune disease and no C-reactive protein in blood serum?

Autoimmune diseases cause inflammations. C-reactive protein should be elevated in a person with an inflammation. Is it possible that a person with an autoimmune disease (e. g. autoimmune hemolytic ...
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What are the likeliest causes for rising indirect bilirubin levels?

All the following data is from a task a professor gave me and is not connected to a true patient. Patient's bilirubin level is first 28 micromole/litre and direct bilirubin level is 8 micromole/litre. ...
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Could NSAIDs lift bilirubin level?

If one takes 800 to 1200 mg of ibuprofen a day for 3 to 4 weeks, could that lift total bilirubin level to around 28 micromole/litre and direct bilirubin to around 8 micromole/litre?
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Why do Vacutainer blood containers contain additives? Are they really necessary and have an effect on blood analysis? [closed]

Just a basic medical science question. Is a vacutainer necessary for use in venous whole blood sample collection? Also is the needle with plastic holder required? Can we not draw blood using a sterile ...
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Why is prothrombin time not used to monitor the effects of heparin?

Unfractionated heparin (UFH) is an anticoagulant that main works "by inactivating thrombin and activated factor X (factor Xa) through an antithrombin (AT)-dependent mechanism". Prothrombin time (PT) ...
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Why are there different blood sugar measurements?

I've been reading about health and wondering why blood sugar measurements are different. Why do these different sites use different measurements and give different numbers? Examples: Less than 100 ...
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62 views

Does mastectomy permanently prevent using the arms for blood samples?

This question, Why can't blood samples be taken from the legs/ankles as well arms/wrists? , refers to Specimen Collection Procedure - PERFORMING A VENIPUNCTURE | Akron Children's Hospital, which says: ...
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Why can't blood samples be taken from the legs/ankles as well arms/wrists?

This is a genuine question, which so far I've been unable to find an answer to. Some time ago when my wife was pregnant, she seemed to be constantly needing to have samples taken for various tests ...
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Why do different labs give different reference ranges? [duplicate]

I've seen various result printouts from different labs, and for the same test, they have different reference ranges. For example, I've seen some labs writing that the reference range for blood ...
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64 views

How reliable is the determination method of reference ranges for blood tests?

A reference range is usually defined as the set of values 95 percent of the normal population falls within (that is, 95% prediction interval). It is determined by collecting data from vast numbers ...
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86 views

What is the blood level evolution of a intramuscular injection?

Suppose an intramuscular injection of a substance is done on a patient. What would be the form of the graph of the blood concentration of this substance over time?
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115 views

Difference between mmol/l and mg/dl for blood glucose measurement

I'm in the process of preparing a short lecture on hypoglycemia. In the process, I discovered that blood glucose levels can be expressed in the measurement of millimoles per liter or milligrams per ...
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28 views

What does a low serum creatinine indicate?

The normal serum creatinine range is [0.80-1.60] mg/dl. If a person's creatinine level is slightly less than 0.80 mg/dl, what does it indicate?
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608 views

Risk of HIV transmission during blood test?

If I as an healthy individual get my blood work done for preventative reasons (health checkup etc...) at mass testing labs (Labcorp) or smaller local internal medicine practices - what are the chances ...
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High lyphocytes count in blood test

What is the lymphocytes counts limit which discriminates a recent infection from a CLL (Chronical Leukaemia Lymphocytosis)?
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What metric is used to measure estrogen levels?

I have had a blood test recently and over the phone I was told by a doctorthat my oestrogen level is high. I'm a man and was told my level is "190, but the average is 150". 190 what? I forgot to ask ...
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How else can a phlebotomist lessen my pain, on top of using a baby needle? [closed]

My grandpa's specialist has ordered quarterly blood tests for him. Most of LifeLabs' phlebotomists (in Ontario, Canada) venipuncture very painfully. Though he didn't mention algophobia, he chanced ...
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173 views

Baby vs. Butterfly Needle

How do they differ? They're mentioned here. I prefer a smaller needle to lessen pain for blood tests.
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135 views

Are there any other probabilities for an O blood typed kid other than O & O parents?

I was watching a Ted-Ed video about blood types. It said that an O kid is only possible for O & O parents. I want to make sure of that fact, and to know whether it's related to only and ...
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61 views

Hormone Definitions and Measurements [closed]

How are human hormones defined in the body and how are they measured? I understand that blood tests can be used to measure the amount of a hormone in the body, but how do we know which hormone ...
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52 views

Can a minor burn influence blood/fecal test results?

If a person sustained a minor burn on their hand from touching a hot object (2-3 hours after the burn there is only some red skin and little pain), and is meant to do blood and fecal tests in the ...
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2k views

Which lab value skeleton diagrams are used to display results for CBC, Chemistry, coagulation panel, etc?

Which lab value skeleton diagrams are used for discrete, cbc/cbcdiff, chem, and coag results?
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What are the factors that make veins easy for a blood test one day, and difficult the next?

I take blood tests quite frequently, and most the time the technicians (Phlebotomists) spend a lot of time searching both my arms for a good vein. I pump my fists, and they smack my arms (and of ...
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Does Blood Testing give meaningful insights in Vitamin/Mineral Deficiency?

I yesterday watched the documentary Vitamania by Dr Derek Muller, which is about the production, benefits and risks of vitamin supplements. In the film, he briefly talked about people being blood ...
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69 views

What software are there to use on laptop for blood analysis and diagnosis?

I wanted to know if there are any softwares that by installing on a notebook can allow me to do initial diagnosis of a patient at ordinary locations. Does anybody know what softwares are there or ...
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33 views

What approaches can I take to find out my blood type and Rhesus factor?

I need to find out my blood type and Rhesus factor. However, there is no medical necessity for this - it's just to know myself. (as such, I'm aware that medical insurance would likely not cover the ...
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191 views

Are metamyelocytes typically present on blood tests?

Is it normal to have metamyelocytes present on a blood test result? Basically, does it adhere to the standard morphology of the WBC & platelet or is it indicative of something abnormal?
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Is there any data about the significance of a blood serotonine level test and links to depression or other psychiatric diseases, or simply mood?

What does low or high blood serotonine levels tell us. Is there any data on the link between certain conditions and serum serotonine concentration?
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Online doctor consultation? [closed]

I'm interested in paying a doctor to chat with me online to help explain my blood test results. Does such a thing exist? And do you know of any affordable good options?
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71 views

Checking nutrition balance

I've just started to explore nutrition. I assume that: a1) A human body needs some minerals and vitamins, which can be delivered either in food or as supplements a2) There's recommended daily ...
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How accurate are blood count tests?

I just started to read about blood count, I am wondering how accuratelly can be determimed the number of red blood cells in case of Rouleaux formation or agglutination of red cells?
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277 views

ABO blood type mismatch

I have a question about blood types and seeming hereditary contradictions. The above image of an Eldoncard blood test, which shows quite clearly that the testee has AB- type blood. (see image!). The ...
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1answer
41 views

Can the foods you have been eating be detected through blood tests?

I know that things like sodium, cholesterol, and sugar levels can be found in blood (at least I think so.) But what about things like fruits and veggies? Can that be detected through bloodwork? Or ...
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I have natural immunity to Hepatitis B. Do I pose risk to others?

Some time ago I was rejected as donor and received following rejection letter: Just wanted to inform you that there was a positive infectious disease result for Hepatitis B. Unfortunately, we ...
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160 views

How fast can serum calcium, magnesium and potassium levels change?

Can serum electrolytes (such as Ca Mg or K) within NORMAL limits rise or drop substantially within 12-24 hours? Enough to go outside of normal range, even to the point of being symptomatic?
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What does the stability of blood test means for patient who have few pains in different parts of the body

What does the stability of a CBC (and all related tests) means for a patient who is not suffering anything besides few ache here or there like in stomach or the back? More generalized, if a blood ...
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665 views

Possible blood test after smoking weed

I'm going to a medical consultation early tomorrow (circa 5:45 AM) where might be a blood test. I was invited for a party tonight where I would drink and smoke marijuana (marijuana is illegal in my ...
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Reason behind testing blood when someone is suffering from Common cold and fever?

What does testing blood helps identifying in case of Common cold or fever? This article about Common cold states, a doctor may do a throat or nasal culture, or blood test to rule out a secondary ...
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What does CRP decreased result means within 2 months [duplicate]

What does it means when you repeat all your blood test between 2 months and all the result are within range and exactly the same as previously, but a test called CRP decreased from 2 to 0.98. Does it ...
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Is There Any Point In Getting Lab Tests Done If I Can't Find a Primary Care Physician?

I've been seeing a therapist for depression and I've been requested to get a physical done so I can have my vitamin D, testosterone levels and thyroid checked. Unfortunately I live in a rural area ...
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72 views

Hospital says their blood test caused sepsis. How serious is this?

My wife went to an Ontario (Canada) public hospital and they performed a blood test, among other things. The test revealed a presence of bacteria in the blood. They said they will send it for analysis ...
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Is undermethylation considered a legitimate diagnosis?

Apparently undermethylation can be diagnosed using blood work. I googled it a bit, and what I saw seemed to suggest that it isn't widely accepted in the medical community. I'm wondering how ...
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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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168 views

Blood Test Panel for weight loss in females

Is there a well regarded medical/academic type of blood panel test or list of items to get tested for, when unable to loose weight, despite proper diet and exercise efforts? For example, this comes ...
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Opposite Venous Blood pH Readings In Groups Of Patients?

Assume Group A and B are 2,000 people each. If one doctor found that, say, sodium bicarbonate alkalized all venous blood of patients in Group A, but another doctor found that sodium bicarbonate ...
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192 views

What do these blood tests mean in general and why do doctors ask for them before taking action?

My doctor ordered some blood tests for me. I would like to understand what each test is for, meaning what information could be gathered from the results. W.B.C. Platelets E.S.R. C.R.P. Alpha feto ...