Questions tagged [blood-tests]

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

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5
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1answer
55 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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1answer
53 views

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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14 views

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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1answer
57 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 ...
6
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1answer
179 views

What blood tests are worth doing for a healthy 30-year-old male?

The patient is a 30-year-old male who seems healthy. The patient has to do a blood test for some administrative forms (namely, proof of immunity to rubella and varicella), and wonder what else could ...
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1answer
33 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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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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0answers
38 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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27 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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1answer
152 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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22 views

Is 0.00 ng/ml a reasonable result for a drug screening?

If someone’s blood was taken to determine whether they’ve been using certain substances such as methylamphetamines, barbiturates, opiates etc., is the value of 0.00 ng/ml a reasonable indication of a ...
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32 views

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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3answers
6k views

Fasting blood glucose and Hemoglobin A1C not valid for athletes?

I've been a competing athlete, mostly in endurance sports for nearly 45 years now. As part of military and other physicals, I have had blood glucose levels come back several times with high levels, ...
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0answers
41 views

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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1answer
139 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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1answer
49 views

How else can a phlebotomist lessen my pain, on top of using a baby needle?

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 ...
2
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1answer
131 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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0answers
60 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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2answers
5k views

How long should a person keep blood test results?

If someone has no chronic health problems (but a family history of diabetes and high blood pressure), is there a good medical reason for them to keep their old blood test results that doctors have ...
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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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1answer
1k 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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1answer
263 views

Why lower gauge needles aren't used to draw blood for blood tests?

I am told that lower gauge needles (broader needles) are used during blood donation to minimize the damage to the RBCs. If the probability of damaging the drawn RBCs is greater with Higher gauge ...
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1answer
36 views

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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47 views

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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1answer
68 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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1answer
51 views

Are medical units pertaining to blood-tests, etc. standard/universal? Or vary from country to country?

Are medical measurements/units pertaining to blood-tests and urine-tests standardized across the globe? Or are they different? (I thought the metric system was standard in science, but when I was ...
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1answer
90 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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1answer
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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29 views

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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1answer
1k views

How many mL of blood is typically drawn for a HIV blood test?

I hope this isn't too broad or unanswerable a question but I'm wondering how many mL of blood serum are typically drawn out for a blood test for HIV. What's the minimum that's typically required?
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1answer
25 views

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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1answer
70 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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0answers
42 views

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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2answers
190 views

What CGM systems don't require fingerstick calibration?

Most continuous glucose monitoring (CGM) systems require you to still do fingerstick blood testing on a daily basis in order to calibrate them. But that defeats the purpose of why people want CGM ...
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1answer
1k views

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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1answer
197 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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2answers
163 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 ...
4
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1answer
76 views

What are the online blood testing services that allow to pick and choose exactly what test you want?

I know there are now several competitive online blood test companies that offer a menu of bundled blood test services in the US. I am looking for a US based service that would disaggregate their ...
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0answers
886 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 ...
2
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2answers
141 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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2answers
237 views

How to detect cancer in general?

Can a common blood test spot cancer in general? Or is it necessary to take some specific tests for each kind of cancer?
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0answers
3k views

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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2answers
243 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 ...
2
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1answer
3k views

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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1answer
68 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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1answer
15 views

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 ...
5
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1answer
183 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 ...
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1answer
111 views

Check Lithium Related Side Effects Without Blood Test

Situation: A middle aged patient with no health insurance and a well documented history of moderate to severe bipolar disorder visits a low cost clinic. The patient has a just lapsed lithium ...
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1answer
21 views

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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0answers
30 views

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 ...