L17 Lab Tests (Asthma)

Description

PHCY310 Quiz on L17 Lab Tests (Asthma), created by Mer Scott on 12/04/2019.
Mer Scott
Quiz by Mer Scott, updated more than 1 year ago
Mer Scott
Created by Mer Scott over 5 years ago
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Resource summary

Question 1

Question
Pneumonia will affect the gas exchange because it affects the alveolar spaces.
Answer
  • True
  • False

Question 2

Question
Alveolar 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
Answer
  • capillary
  • gas
  • Av and perfusion
  • poor
  • embolism
  • ventricular

Question 3

Question
When PaCO2 gets high we breathe slower.
Answer
  • True
  • False

Question 4

Question
Spirometry 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.)
Answer
  • 0.8
  • 400 - 600
  • sensitive
  • asthma, COPD, bronchitis
  • FEV1
  • FEV/FVC
  • reversibility
  • fibrosis
  • COPD
  • FVC
  • reduce

Question 5

Question
Partial 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
Answer
  • inspired
  • atmospheric
  • < 60 mmHg
  • 40 mmHg
  • tissues
  • > 50 mmHg
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