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Self-prescription is reasonably safe assuming that the compression gradient is 15–20 mmHg, the ABPI (for both legs) is >1.0 and that the stockings fit correctly. "Firm" gradient stockings (20–30 mmHg and 30–40 mmHg) should generally be worn only on medical advice.
In medical contexts, compression garments provide support for people who have to stand for long periods or have poor circulation. These come in varying degrees of compression, and higher degree compression sleeves, such as sleeves that provide compression of 20–30 mmHg or higher, typically require a doctor's prescription. [1]
The advent of the fashionable miniskirt, which exposed the legs to well above the knee, made pantyhose a necessity to many women. In 1970, U.S. sales of pantyhose exceeded stockings for the first time, and it has remained so ever since. [14] Pantyhose became a wardrobe staple throughout the 1970s and 1980s. Sheer tights with a control-top
If the pressure is dropped to a level equal to that of the patient's systolic blood pressure, the first Korotkoff sound will be heard. As the pressure in the cuff is the same as the pressure produced by the heart, some blood will be able to pass through the upper arm when the pressure in the artery rises during systole .
Abdominal compartment syndrome is defined as an intra-abdominal pressure above 20 mmHg with evidence of organ failure. Abdominal compartment syndrome develops when the intra-abdominal pressure rapidly reaches certain pathological values, within several hours (intra-abdominal hypertension is observed), and lasts for 6 or more hours.
The millimetre of mercury is defined as the pressure exerted by a column of mercury 1 millimetre high with a density of 13 595.1 kg/m 3 (approximate density at 0 °C or 32 °F) at standard gravity (9.806 65 m/s 2), i.e. precisely 133.322 387 415 pascals. 1 mmHg = 1 mm × 13 595.1 kg/m 3 × 9.806 65 m/s 2 = 133.322 387 415 Pa (exactly)
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