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Questions tagged [measurement]

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2
votes
0answers
29 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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0answers
21 views

Where are good abdominal places for measuring SO2 and heart rate via reflective pulse oximeter?

I'm trying to develop a belt (wearable device) from which I could measure belly stretch (exhalation, inhalation), heart pulse frequency and blood oxygen saturation data via optical EKG (reflective ...
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2answers
24 views

Could sleep apena outcomes be improved by adding sensors to measure the location and movement of the jaw?

"When you are a hammer", the proverb goes, "everything looks like a nail". To my knowledge current apnea testing involves a multitude of sensors that record the position of various parts of the body ...
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1answer
151 views

What are normal values for EMG/nerve conduction studies?

Where can I find a detailed table of normal values for NCS (nerve conduction studies) for the various arm nerves - ulnar, median, radial; including both motor and sensory component of each nerve; ...
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0answers
38 views

How wrist wearables count breaths?

I am doing a research about wrist wearables in order to understand how they work. They can be used to measure stress levels, just like pupillometry, skin conductance and other related measures can be. ...
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0answers
193 views

RAE vs IU in Vitamin descriptions

Reading an article about Vitamin-A: Vitamin A Fact Sheet for Health Professionals The following acronym RAE in: RDAs for vitamin A are given as mcg of retinol activity equivalents (RAE) to ...
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0answers
38 views

Mid-20C paper on pain perception in undergraduate males

I am seeking a particular paper on pain perception in undergraduate males. In the late 1980s, my father told me about the experiment in the paper. My recollection is that he had read it long before, ...
2
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1answer
73 views

What (if any) are the measurement units for neurotransmitters?

I've searched through the web for how to measure neurotransmitters (such as dopamine, serotonin, and oxytocin), but could not find any. Could someone please specify if there is a unit of measurement, ...
2
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1answer
58 views

Wrist Blood Pressure Monitor Accuracy?

I have both a wrist blood pressure monitor and an upper arm blood pressure monitor. I generally enjoy using the wrist monitor more, as it's difficult for me to secure the cuff on the arm monitor, as ...
1
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1answer
11 views

gauge R&R of time varying data: how to discriminate between equipment variation and actual signal variation?

I am trying to evaluate a measurement system suitability for some physiological parameters say heart rate. If I collect say 30 measurements of my heart rate, the standard deviation of the population ...
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1answer
23 views

Unit of the daily recommended amount of calories

Average calories required for a man are 2000 to 2200. Is the unit calories, or kilo-calories (sometimes also called Calories)?
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35 views

What level of alcohol is dangerous for children

I've come across a number of food products that have some alcohol ranging from .04% to 2% they often don't have warnings and you only find by going through the ingredients. Some examples deserts ...
2
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0answers
772 views

Period between Heart lub-dup sound S1 and S2

Just curious not asking a professional opinion, Does anyone know the average time difference between S1 and S2 sounds of the heart the so called lub-dup sound? I believe its around 150 milliseconds. ...
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1answer
43 views

How long a phonocardiography (PCG) should be for diagnosis?

I have many PCG records with different lengths, what is the minimum length (minutes or seconds) that a specialist use to diagnose any abnormalities in heart? Highly appreciate your help. Cheers
4
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1answer
38 views

Who decides the “normal” values for blood count?

I'm currently researching the values for a Complete Blood Count. Obviously different sources give slightly different values, usually due to rounding, but I found that some values consistently shifted ...
1
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0answers
12 views

Are there any reasonably-priced technology to measure any part of your body to help cut the pressure garment precisely

I am not sure if this topic belongs here but could not find a more relevant stackexchange site. My kid is receiving a pressure garment treatment to recover from severe burn. However, cutting the ...
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0answers
27 views

What's the Right Amount of Conditioner to Use for Thick, Male Hair?

I tend to use almost a handful, but I don't know if that's dumb. I don't have long hair, either. On the top, I cut to 8 or 7, usually, and that's the longest I have it.
4
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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?
4
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1answer
49 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 ...
2
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0answers
332 views

Fever lower limit ( 99.0 °F (37.2 °C) at armpit)… is it universal?

Surprisingly, all professional doctors, school-textbooks and other resources, consider as armpit temperatures: > 99 ° F (some-others > 98.6 &deg F) = Fever; = 99 ° F (Some-others = ...
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0answers
329 views

How can I quantify muscle tightness?

How can I quantify muscle tightness? I'm mostly interested in forarm muscles. I could ask a physical therapist to assess muscle tightness by touching the muscle. What are other solutions? The more ...
3
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1answer
50 views

Why is blood glucose measured using molar concentration internationally?

In the US, blood glucose is measured in mg/dL, while the rest of the world tends to use mmol/L. Is there any reason for using the molar concentration rather than the mass concentration? Or is it just ...
1
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2answers
571 views

Normal resting heart rate and how to measure it

There is somewhat conflicting information on what the "normal" resting heart rate should be. Some sites cite rates between 60 and 100 as being normal, with rates below 60 being defined as bradycardia, ...
2
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0answers
57 views

Way to measure different degrees of a mental disorder? [closed]

Is it possible to have a disorder that might only display some of the symptoms, is not as defined, or episodic, making it "borderline"? Is there a way to measure, or at least express the severity of a ...
1
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0answers
22 views

How is measured the transmission rate of virusses?

I would like to know how is measured the transmission rate of viruses, for example, there is a 'normal' flu, his transmission rate is '1', but for a virus like H1N1 the transmission rate is '0.2' ...
2
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1answer
832 views

Markings on a 3ml syringe

I have some 3ml syringes with 23Gx1" needles. But there is also a second scale on the syringe that is marked as "M" and 40M is right at around the 2.5 ml measure. What is this M scale mean? I thought ...
0
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1answer
107 views

Melanocyte count in our skin

How many melanocytes can be found in one square milimeter of the skin. Is 1500 melanocytes per square-milimeter skin indeed the correct number?
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0answers
49 views

How can I measure my tendon length?

I read on Wikipedia's page on tendon (mirror): Tendon length varies in all major groups and from person to person. How can I measure my tendon length? I am mostly interested in the tendons that ...
3
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0answers
187 views

How to measure scoliosis angle?

I am interested in how to measure scoliosis curve angle without X-Ray. As far as I know there are two ways to measure the angle - VCM and Cobb's angles. But again they require X-Ray. Can I measure the ...
8
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2answers
2k views

Does BMR adjust and decrease in response to calorie restriction diets?

Is it possible for your Basal Metabolic Rate (BMR) to adjust in response to dieting for long periods of time? If this does happen how much can it go down? I have heard that BMR ranges from 1000 - 2500 ...
10
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1answer
4k views

Does having more muscles influence blood pressure measurement?

As stated in the title, do we have any evidence that having a big muscular arm influence BP measurement?
11
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1answer
1k views

Is there an optimal body fat percentage?

Many digital bathroom scales nowadays include automatic measuring of the (approximate) percentage of body fat. I am aware of some guidelines for percentage of body fat loss, but are there actually ...