how is this measured?
Arterial pressure is most commonly measured via a sphygmomanometer, which uses the height of a column of mercury, or an aneroid gauge, to reflect the blood pressure by auscultation.
Blood pressure
Arterial pressure is most commonly measured via a sphygmomanometer, which uses the height of a column of mercury, or an aneroid gauge, to reflect the blood pressure by auscultation. 
true or false anaphylaxis generally only affects the skin and eyes Incorrect. why does this happen? Common causes include insect bites and stings, foods, and medications. Other causes include latex exposure and exercise. how does the latter effect? Through their direct effects on mast cells. can you tell me more about this last mentioned cells. It is a migrant cell of connective tissue that contains many granules rich in histamine and heparin. is this cell responsible for any disorders? Yes, Mast cell activation disorders. can you name a few. UNANSWERABLE what are the above mentioned granules? In cell biology, a granule is a small particle. what is it made up of ? It is a tightly interwoven network of differentially localized RNA-binding proteins. what is its main purpose ? Storage. what are the symptoms of the first mentioned disease ? An itchy rash, throat or tongue swelling, shortness of breath, vomiting, lightheadedness, low blood pressure, and temporary blindness. can you explain what is the second last mentioned symptom? A systolic blood pressure of less than 90 millimeters of mercury (mm Hg) or diastolic of less than 60 mm Hg is generally considered to be hypotension or low blood pressure.
wiki:5415202
Blood pressure [SEP] Measurement
Arterial pressure is most commonly measured via a sphygmomanometer, which uses the height of a column of mercury, or an aneroid gauge, to reflect the blood pressure by auscultation. The most common automated blood pressure measurement technique is based on the oscillometric method. Fully automated oscillometric measurement has been available since 1981. This principle has recently been used to measure blood pressure with a smartphone. Measuring pressure invasively, by penetrating the arterial wall to take the measurement, is much less common and usually restricted to a hospital setting. Novel methods to measure blood pressure without penetrating the arterial wall, and without applying any pressure on patient's body are currently being explored.