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Physio > Respiration > Flashcards

Respiration Flashcards

1
Q

Functional Residual Capacity (FRC) Is

A
  1. Amount of gas in the lungs at the end of a passive expiration
  2. Neutral or equilibrium point for the Respiratory System
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2
Q

FRC is the marker for

A

Lung compliance

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3
Q

Inspiratory capacity (IC) is

A

Maximal volume of gas that can be inspired from FRC

So bottom of TV to the very top

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4
Q

Inspiratory reserve volume (IRV) is

A

Additional amount of air that can be inhaled after normal inspiration

So, from the top of TV to the max

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5
Q

Expiratory reserve volume (ERV) is

A

Additional volume that can be expired after a passive expiration

From bottom of TV to the top of RV

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6
Q

Residual volume (RV) is

A

Amount of air in the lung after a maximal expiration

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7
Q

Vital capacity (VC) is

A

Maximal volume that can be expired after a maximal inspiration

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8
Q

Total ventilation =

A

VT X f

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9
Q

Alveolar ventilation =

A

(VT - DS) X f

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10
Q

What is the net result during inspiration

A

to make Intrapleural pressure more negative

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11
Q

Lung compliance =

A

ΔV/ΔP

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12
Q

What will increase lung compliance curve

A
  1. Emphysema
  2. Aging
  3. Normal Saline in alveoli
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13
Q

What will decrease lung compliance

A

Fibrosis

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14
Q

FEV1/FVC in restrictive disorders

A

Normal

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15
Q

FEV1/FVC in obstructive disorders

A

Decrease

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16
Q

Lab results of Obstructive disorder

A
  1. Decrease FVC
  2. Increase FRC
  3. Increase TLC
  4. Increase RV
  5. Severly decreased FEV
17
Q

Obstructive is due

A

Breathing in is normal, but can’t breath out.

18
Q

Lab results in Restrive disorder

A

Everything decreases but FEV1/FEV is normal

19
Q

What does the flow-volume loop look like in obstructive disease

A

Begns and ends at abnormally high lung volumes

Expiratory flow is lower than normal

Downslope scalops or bows inward

20
Q

Each g of Hb can combine with

A

1.34 mL of O2

21
Q

What shifts Oxygen-Hb curve to the right

A
  1. Increase CO2
  2. Decrease pH (Increase H+)
  3. Increase Temperature
  4. Increase 2,3-BPG
22
Q

What shifts Oxygen-Hb curve to the left

A
  1. Decrease CO2
  2. Increase pH (Decrease H+)
  3. Decrease Temperature
  4. Decrease 2,3-BPG
23
Q

Right shift of Oxygen-Hb curve indicates

A

Reduced affinity of Hb molecule for oxygen

24
Q

Stimulation of central chemoreceptors locatedin medulla cause

A

increased ventilation

25
Q

What governs central chemoreceptors

A

CSF H+ and CO2

Mainly CO2

26
Q

Peripheral chemoreceptors found in

A

Carotid bodies (CN 9)

Aortic bodies (CN 10)

27
Q

Apneustic breathing is due to

A

Loss of the normal balance between vagal input and the pons-medullary interactions

Leasion in Caudal pons

28
Q

Cheyne-Stokes breathing is due

A

Midbrain lesion or CHF

29
Q

Ventilation is

A

Adding Oxygen

Removing Carbond dioxide

30
Q

Perfusion is

A

Removing oxygen

Adding Carbon dioxide

Physio (11 decks)

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