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An oropharyngeal airway (also known as an oral airway, OPA or Guedel pattern airway) is a medical device called an airway adjunct used in airway management to maintain or open a patient's airway. It does this by preventing the tongue from covering the epiglottis , which could prevent the person from breathing.
The correct size airway is chosen by measuring the device on the patient: the device should reach from the patient's nostril to the earlobe or the angle of the jaw. [10] The outside of the tube is lubricated with a water-based lubricant so that it enters the nose more easily. [5] The device is inserted until the flared end rests against the ...
In human body measurement, these three sizes are the circumferences of the bust, waist and hips; usually rendered as xx–yy–zz in inches, or centimeters. The three sizes are used mostly in fashion , and almost exclusively in reference to women, [ 1 ] who, compared to men, are more likely to have a narrow waist relative to their hips.
Bra size 70B is suitable for women with underbust girth 68–72 cm and bust girth from 82–84 cm to 86–88 cm. Example 2 A woman with an underbust girth of 89 cm and a bust girth of 108 cm has cup size 19 cm (= 108 cm – 89 cm) or "D". Her underbust girth rounded to the nearest multiple of 5 cm is 90 cm.
A 1951 USAF resolution test chart is a microscopic optical resolution test device originally defined by the U.S. Air Force MIL-STD-150A standard of 1951. The design provides numerous small target shapes exhibiting a stepped assortment of precise spatial frequency specimens.
Below is a list of currently available tablet PCs grouped by their width, depth, height, screen size, and appropriate tablet case sizes. The most popular presently available tablet computers are compared in the following table:
How to measure bra size with a measuring tape Step1: Find your bra band size Start by wearing an unlined, non-padded bra or a fitted t-shirt, running the measuring tape all of the way around your ...
Phthalaldehyde (sometimes also o-phthalaldehyde or ortho-phthalaldehyde, OPA) is the chemical compound with the formula C 6 H 4 (CHO) 2. It is one of three isomers of benzene dicarbaldehyde , related to phthalic acid .