Respiratory Minute Volume - Wikidoc
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Respiratory minute volume (or minute ventilation, or flow of gas) is the volume of air which can be inhaled (inhaled minute volume) or exhaled (exhaled minute volume) from a person's lungs in one minute. This is normally registered when a person has a ventilator supporting the person's breathing due to a sickness or injury.
Minute volume is calculated by taking the tidal volume and multiplying the respiratory rate (the number of breaths per minute a person is taking). The higher the minute volume the more carbon dioxide (CO2) the person is releasing, the converse is the lower the minute volume the lower the amount of carbon dioxide the person is releasing. For example a person who is hyperventilating would have an increased minute volume.
A normal minute volume would be 5-8 liters per minute.
The symbol used to represent minute volume is <math> \dot{V}</math> or MV.
"Alveolar ventilation" is a closely related quantity, consisting of the respiratory rate multiplied by the dead space subtracted from the tidal volume.
External links
- Overview at healthsystem.virginia.edu
- Overview at ccmtutorials.com
- Essentials of Human Physiology by Thomas M. Nosek. Section 4/4ch3/s4ch3_15.
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| Lung volumes | VC · FRC · Vt · dead space · CC calculations: respiratory minute volume · FEV1/FVC ratio devices: spirometry · body plethysmography · peak flow meter |
| Airways/ventilation (V) | positive pressure ventilation · breath (inhalation, exhalation) · respiratory rate · respirometer · pulmonary surfactant · compliance · hysteresivity · airway resistance · bronchial hyperresponsiveness · bronchial challenge test · bronchoconstriction/bronchodilation |
| Blood/perfusion (Q) | pulmonary circulation · hypoxic pulmonary vasoconstriction · pulmonary shunt |
| Interactions/ventilation/perfusion ratio (V/Q) | ventilation/perfusion scan · zones of the lung · gas exchange · pulmonary gas pressures · alveolar gas equation · alveolar-arterial gradient · hemoglobin · oxygen-haemoglobin dissociation curve (2,3-DPG, Bohr effect, Haldane effect) · carbonic anhydrase (chloride shift) · oxyhemoglobin · respiratory quotient · arterial blood gas · diffusion capacity · DLCO |
| Control of respiration | pons (pneumotaxic center, apneustic center) · medulla (dorsal respiratory group, ventral respiratory group) · chemoreceptors (central, peripheral) · pulmonary stretch receptors (Hering-Breuer reflex) |
| Insufficiency | high altitude · oxygen toxicity · hypoxia |
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Tag » How To Calculate Minute Ventilation
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