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17 votes
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People who can't receive O negative blood?

O negative blood doesn't have either the A or B antigen, and is also negative for the rhesus antigen. These are the most common antigens expressed on blood cells, and are responsible for most ...
Michael's user avatar
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14 votes

People who can't receive O negative blood?

The incident in that episode of television was mostly pure fantasy. There are 35 blood type groups recognized by the International Society of Blood Transfusion, but for simplicity's sake, most people ...
anongoodnurse's user avatar
10 votes
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Is lipaemia the same as hyperlipidemia?

These are not really synonymous. Despite some sites claiming them to be. Compare the usage on this site. Lipaemia is describing lab artifacts, that is roughly too much fat in the blood sample that ...
LаngLаngС's user avatar
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9 votes
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Medical relevance of tetanus vaccination

Clostridium tetani is the causative organism in tetanus. It requires an anaerobic environment to grow so is found in soil and in the gut of animals. Person to person transmission is not possible. ...
Graham Chiu's user avatar
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9 votes
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Why do surgeons wear blue aprons during surgeries?

Initially surgeons did wear white in the operating theater, but there were two large problems with this. Firstly, under the bright lights, the white reflects too much light making an inordinate amount ...
David's user avatar
  • 104
9 votes

Is lipaemia the same as hyperlipidemia?

Because the context refers to a serum sample, and it sounds like a low quality one, you should use lipemia (or, the british variant lipaemia), not hyperlipidemia. See here for an example of the ...
De Novo's user avatar
  • 3,188
9 votes

People who can't receive O negative blood?

Bombay phenotype hh or the Bombay blood group, is a rare blood type. This blood phenotype was first discovered in Bombay by Dr. Y. M. Bhende in 1952. It is mostly found in the Indian sub-continent (...
fraxinus's user avatar
  • 191
8 votes
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Can eating chalk cause very low level haemoglobin level?

Eating chalk is a type of Pica. It is characterized by an appetite for substances that are largely non-nutritive, such as paper, clay, drywall or paint, metal, chalk, soil, glass, or sand which is ...
CCR's user avatar
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8 votes
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Is it possible to change person's blood group?

Yes, it is possible. In a bone marrow transplant, all of the patient's bone marrow is destroyed and replaced with donor marrow. Since red blood cells are created by bone marrow, the donor's blood type ...
Carey Gregory's user avatar
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8 votes
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Normal for menstruation blood to be brown/black at the start?

Menstrual blood is composed of a mixture of blood (blood cells), vaginal secretions, endometrial cells and inflammatory cells. I have found no study investigating the change in colour of mentruation ...
M. Arrowsmith's user avatar
7 votes

dangers of keeping blood in a jar

First problem: Blood is an organic substance, and like all organic substances that aren't cooked, refrigerated or otherwise preserved, it will rot. You'll need to freeze or at least refrigerate it. ...
Carey Gregory's user avatar
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7 votes
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Is it possible to get a cut from being elbowed in the head?

There are a few different types of injury to the skin. You can have a contusion (Bruise), abrasion (scrape), puncture, laceration or incision. The injury that you suffered is a laceration, as opposed ...
JohnP's user avatar
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7 votes
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What do these blood tests mean in general and why do doctors ask for them before taking action?

CRP C-reactive protein (CRP) is produced by the liver. The level of CRP rises when there is inflammation throughout the body. It is one of a group of proteins called "acute phase reactants" that go ...
Narusan's user avatar
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7 votes
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How does a blood transfusion directly from one person to another through a line work?

Direct blood transfusion is both dangerous for the donor and inconvenient in a modern medical setting, so this does not really happen today outside of movies/TV. Before blood banking and ...
Bryan Krause's user avatar
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6 votes

Are there variations in blood cholesterol by age?

Levels generally increase until the ages of 50-60, then fall. In children, levels of LDL and HDL generally either rise or fall monotonically (i.e. continuously) over childhood; see Dai et al. (2009). ...
HDE 226868's user avatar
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6 votes

Occasional medical tests and imageries

Screening tests such as "blood tests and imaging" have two costs and one benefit: the cost (dollars and possible health problems) of the actual screening, which can in some cases be free the cost (...
Kate Gregory's user avatar
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6 votes

Occasional medical tests and imageries

Great answer above. This is to add on to it: Making a decision on whether to recommend screening tests for the entire population is different from deciding whether to screen an individual patient. ...
DoctorWhom's user avatar
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6 votes
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What happens when a hemophiliac woman gets her period?

"Luckily" haemophilia only occurs in men*; women may be carrier of the disease but their bleeding tendency is in general less severe. However, haemophilia carriers and women with other bleeding ...
Jasper's user avatar
  • 286
6 votes

How to calculate my "approximate" mortality rate while in ICU?

An individual person does not have a mortality rate: it means the fraction of people out of a group who die over a specific time period. It may seem like your particular chance of dying is that same ...
Kate Gregory's user avatar
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6 votes
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How can warming your feet send cold blood to your heart?

When hypothermic, the blood vessels in the arms and legs constrict; by not sending (as much) blood to the extremities, more heat is retained in the core and head/neck area, prolonging survival (at the ...
Bryan Krause's user avatar
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5 votes
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Blood donor restrictions (Mad Cow Disease) in Australia/France for people who lived in Britain, is it justified?

Blood donor restrictiction aims at preventing the transmission of the variant Creutzfeldt-Jakob disease (also known as Mad Cow Disease for a layperson), which is a prion disease that leads to ...
M. Arrowsmith's user avatar
5 votes
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What are the online blood testing services that allow to pick and choose exactly what test you want?

Somehow today I had a bit more luck in addressing my own question. It seems that many of the online blood testing services do offer tests on a disaggregated basis. Their more popular products are ...
Sympa's user avatar
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5 votes

how many 'lives' are saved from one donation of blood?

Here are some statistics: Each year, an estimated 6.8 million people in the U.S. donate blood. 13.6 million whole blood and red blood cells are collected in the U.S. in a year. Giving blood saves 4.5 ...
David Roop's user avatar
5 votes
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What causes aortic aneurysm

Aneurysm - a pathologic ballooning of a segment of a blood vessel Source: http://www.nhlbi.nih.gov/health/health-topics/topics/arm/types - Public Domain In order for an aneurysm to occur, conditions ...
neerajt's user avatar
  • 701
5 votes

Can blood transfusion help in case of scleroderma?

I'm not aware of any work done in this area. A whole blood transfusion is not going replace circulating defective lymphocytes. On the other hand Hematopoietic Stem Cell Transplantation has some ...
Graham Chiu's user avatar
  • 13.3k
5 votes

How can blood pressure be high but my pulse low?

If that is the accurate pressure, you really need to go to the emergency room! 188 is high but not immediately dangerous, but 134 for a diastolic is outrageous. At very least go to an urgent care or ...
quietmedic's user avatar
5 votes

Blood in urine without seeing it...?

Yes. what you are describing sounds like microscopic hematuria (1). Sometimes red blood cells(RBC) are not numerous enough to be visible in urine. Yet, when tested, RBCs are detected. (1) http://www....
Jack Frost's user avatar
5 votes
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What keeps our organs in place?

They’re fastened together by blood vessels, nerves and most importantly, connective tissue, muscles and bones. Image Source: anatomyorgan.com Image Source: Britannica The same holds true for other ...
Narusan's user avatar
  • 6,772
5 votes

Can HIV patients get further infected by their own blood?

No. One is either infected or one isn't. There is no middle ground. Infection is defined as invasion and multiplication of microorganisms in body tissues, as in an infectious disease. Also, ...
Narusan's user avatar
  • 6,772
5 votes
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How is blood cleared from the body after internal bleeding

After internal bleeding, the blood serum from the blood can be reabsorbed back into the circulation (capillaries), and the blood cells can be phagocytosed by macrophages. The blood serum from the ...
Jan's user avatar
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