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L17 Lab Tests (Asthma)
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Questions in this quiz (5)
1Pneumonia will affect the gas exchange because it affects the alveolar spaces.
- ATrue
- BFalse
2Alveolar ventilation (Av) allows gas to move from the lungs to blood. An adequacy of [blank_start]capillary[blank_end] flow to the lungs is required for adequate [blank_start]gas[blank_end] exchange. When the capillary flow is compromised, a mismatch will occur between [blank_start]Av and perfusion[blank_end]. (I.e. even when alveolar ventilation is fine, if blood flow to the alveolar capillaries is poor the perfusion of gasses will be [blank_start]poor[blank_end].)
Factors that affect pulmonary capillary flow include:
- pulmonary [blank_start]embolism[blank_end]
- right [blank_start]ventricular[blank_end] dysfunction- Acapillary
- Bgas
- CAv and perfusion
- Dpoor
- Eembolism
- Fventricular
3When PaCO2 gets high we breathe slower.
- ATrue
- BFalse
4Spirometry tests assess alveolar ventilation. A FEV/FVC (Forced Expiratory Volume (1s) & Forced Vital Capacity) ratio is usually [blank_start]0.8[blank_end].
Peak expiratory flow rate (L/min) values of PEFR depend on size, sex and age, but typically a healthy range for adults is [blank_start]400 - 600[blank_end] L/min. PEFR tends to be less [blank_start]sensitive[blank_end] to small airways disease.
Obstructive diseases ([blank_start]asthma, COPD, bronchitis[blank_end]) reduce the expiration ability (reduce [blank_start]FEV1[blank_end] and [blank_start]FEV/FVC[blank_end] ratio.) There is evidence of [blank_start]reversibility[blank_end].
Restrictive diseases ([blank_start]fibrosis[blank_end], end stages of [blank_start]COPD[blank_end]) reduce the usable capacity (reduce [blank_start]FVC[blank_end], and [blank_start]reduce[blank_end] FEV.)- A0.8
- B400 - 600
- Csensitive
- Dasthma, COPD, bronchitis
- EFEV1
- FFEV/FVC
- Greversibility
- Hfibrosis
- ICOPD
- JFVC
- Kreduce
5Partial pressure of oxygen & carbon dioxide:
1. PaO2, partial pressure of oxygen in the arterial circulation
- PaO2 is dependent on [blank_start]inspired[blank_end] O2 and [blank_start]atmospheric[blank_end] pressure.
- Values [blank_start]< 60 mmHg[blank_end] typically cause symptoms.
2. PaCO2, partial pressure of CO2 in the arterial circulation
- Normal value is [blank_start]40 mmHg[blank_end]
- It is produced by [blank_start]tissues[blank_end] during internal respiration
- Values [blank_start]> 50 mmHg[blank_end] typically cause symptoms- Ainspired
- Batmospheric
- C< 60 mmHg
- D40 mmHg
- Etissues
- F> 50 mmHg
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- User has deleted their subject information Quiz on L17 Lab Tests (Asthma), created by Deleted user on 14/04/2019.
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- Created on 14 Apr 2019 · updated on 26 May 2019
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