q v - définition. Qu'est-ce que q v
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Qu'est-ce (qui) est q v - définition

CARDIORESPIRATORY PROPERTY
Ventilation-perfusion ratio; Ventilation-perfusion inequality; V/q; Ventilation perfusion ratio; V/Q; Ventilation/perfusion mismatch; V/Q mismatch

Q with stroke         
  • Q with diagonal stroke in [[Doulos SIL]]
  • French-language]] extract of page 9 of [[Joachim du Bellay]]'s 1549 work ''[[La Défense et illustration de la langue française]]''. The text of the extract is: ''Barbares anciẽnement etoint nõmez ceux, '''ꝗ''' ĩeptemẽt ꝑloint Grec.''
LETTER OF THE LATIN ALPHABET
Q̵; Ꝗ; Ꝗꝗ; Ꝙ
Q with stroke (Ꝗ, ꝗ) is a letter of the Latin alphabet, derived from writing the letter Q with the addition of a bar through the letter's descender. The letter was used by scribes during the Middle Ages, where it was employed primarily as an abbreviationa modern parallel of this would be abbreviating the word "and" with an ampersand (&).
Q (dairy)         
NORWEGIAN DAIRY COMPANY
Q–meieriene; Q Milk; Q-Milk; Q-Melk; Q Melk; Q-meieriene
Q or Q–meieriene is a private dairy products company based in Bergen, Norway. It is owned by the Kavli Group (Kavli Holding AS) which in turn is owned by the Kavli Trust (Kavlifondet).
Q         
  • POPVLVSQVE]]", was carved into [[Trajan's column]] c. [[AD]] 113.
  • Latin Q
  • A long-tailed Q as drawn by French typographer [[Geoffroy Tory]] in his 1529 book ''Champfleury''
  • Proto-Sinaitic Qup
  • 20px
  • g}}
  • The five most common typographic presentations of the capital letter Q.
  • 77}}
LETTER OF THE LATIN ALPHABET
Q; Q (alphabet); Q (letter); User:Psiĥedelisto/Q tails; ASCII 81; ASCII 113; U+0051; U+0071; Letter Q; Long-tailed Q; Short-tailed Q; Cue (letter); Que (letter); Kew (letter); Queue (letter)
Symbol for electric quantity.

Wikipédia

Ventilation/perfusion ratio

In respiratory physiology, the ventilation/perfusion ratio (V/Q ratio) is a ratio used to assess the efficiency and adequacy of the matching of two variables:

  • V – ventilation – the air that reaches the alveoli
  • Q – perfusion – the blood that reaches the alveoli via the capillaries

The V/Q ratio can therefore be defined as the ratio of the amount of air reaching the alveoli per minute to the amount of blood reaching the alveoli per minute—a ratio of volumetric flow rates. These two variables, V and Q, constitute the main determinants of the blood oxygen (O2) and carbon dioxide (CO2) concentration.

The V/Q ratio can be measured with a ventilation/perfusion scan.

A V/Q mismatch can cause Type 1 respiratory failure.