Obstructive (can't get air OUT) Lung Dysfunction: Exam 2 Flashcards
OLD or
Obstructive Lung Disease!!!
What is Chronic Obstructive Pulmonary Disease
OLDs as a WHOLE?
- Dis’s of airways, which produce obstruction of expiratory flow AND incomplete emptying of lungs
3 KEY components to Obstructive Lung Disease
- DECd diameter of airways
- Hyperinflation of alveoli
- INCd resistance to Airflow
- Air Trapping!!!
In Obstructive lung disease
Airflow obstruction can be related to 4 things:
- Retained or excessive secretions
- Inflammation of mucosal linings of airway walls
-
Bronchial constriction:
- tone
- spasm
- size
- inflammation
- Weakening of support structure or alveoli
Obstructive Lung Diseases====>
CBABE
Obstructive Lung Diseases
CBABE
- C: Cystic Fibrosis
- B: (chronic) Bronchitis
- A: Asthma
- B: Bronchiectasis
- E: Emphysema
Remember….there is a Difference b/w Chronic Obstructive Pulmonary Disease and just your “standard” COPD
What is the “Classic” COPD??
- COPD== (chronic) Bronchitis + Emphysema TOGETHER!!!
Dx Imaging Tools for COPD:
4 Tools:
- Chest Xray
- PFT
- ABG
- CT scan
What is the Hallmark S/S for OBSTRUCTIVE LUNG DISEASE?
*Seen on Chest Xray*
Flattening of the Diaphragm
*Extra air in lungs pushes it DOWN
GOLD STANDARD TEST for OLD’s???
PFT
PFT Test of OLD’s
What are the components?
What does it determine?
- As severity of lung obstruction INCs—-> LESS and LESS air can be exhaled in 1sec
- this det’s our FEV1
- MSK system
- Diaphragm
ABG test and OLDs
- MANY factors affect gas exchange
- obstruction
- hyperinflation
- secretions
An abnormal ABG test w/ OLD
will show what?
- PCO2
- >CO2 (INCd)
- PO2
*
RV and OLDs
BIG INC in RV *****
BIG TLC
PFT Test
Normal vs. Obstructive
Break it down!!!
-
Normal: Example
- FEV1= 3.0L
- FVC (tot. air we breathe OUT)= 4.0L
- FEV1/FVC= 75% (Nrml is .70)
-
Obstructive: example
- FEV1= 1.0L (cant get air OUT)
- FVC= 4.0L
-
FEV1/FVC= 25% (LOW bc cant get air OUT)
- Obstructive Dis.=
- **As FEV1/FVC shrinks==> MORE severe OLD***
FEV1/FVC
OLD!!!
COPD: MSK Component
What should you look @?
Flattening of the Diaphragm!!!!
COPD: MSK Component
Sequela #1:
Talks about EXPIRATION
- Anatomically Barrel Shaped diaphragm—>
- CLASSIC S/S—> ribs now angled out horiz.
- Diaphragm pulled to flat pos.—>
- Length-tension relationship changes—>
- Exhalation now active or forced—->
- remember should be passive
- Leads to excessive fatigue + caloric use—->
- using mm’s not norm. active
- all energy goes to breathing
- these people DO NOT eat
- Excess abd. pressure==> urinary incontinence
COPD: MSK Component
Sequela #2:
Talks about INSPIRATION
- Anatomically barrel-shaped diaphragm—>
- Diaphragm pulled to flat pos.—–>
- Altered length-tension relationship—->
-
Inspiration req’s accessory mm’s to overcome large RV+ poor functioning diaphragm—>
- *still diff. to breathe IN bc fighting lg. RV
- Hypertrophied acess. mm’s + functional shortening
What will Posture look like w/ OLD?
Forward Head
Rounded shoulders
Thoracic kyphosis
SIDE NOTE: What happens to the diaphragm w/ the MSK component of OLD?
- Switches to Type II skeletal mm fibers
- NEEDS SUGAR
- takes leucine from quads and makes it into sugar
- Glucose-Alanine Cycle***
32% pts w/ COPD have skeletal mm weakness
INCd prevalance directly related to severity of the disease
USUALLY LE MORE
*ESP the QUADS
Psychological impairments of COPD
3:
- Anxiety
- Depression
- Cognitive decline
S/S of OLD:
- Signs of lung hyperinflation
- Elevation of shoulder girdle
- Horizontal ribs
- Barrel-shaped thorax
- Low, flattened diaphragm
- Anxiety
- Cough w/ secretions
- Hypertrophy of SCM
- Forward posture
Adult COPD
What is this a combination of?
Emphysema
+
chronic Bronchitis
Adult COPD: Emphysema
what is it?
Condition of lung characterized by destruction of alveolar walls and enlargement of airspaces DISTALLY
Adult COPD: Emphysema
also enlargement of airspaces Distally:
what are these Distal airspaces?
- Bronchioles
- Alveolar ducts
- Alveoli
Emphysema think…….
Alveolar Destruction
MOST COMMON CAUSE OF EMPHYSEMA
Smoking
Emphysema
Distal airways enlarged
1. bronchioles
2. alveolar ducts
3. alveoli
*All 3 of these make up what?
Parenchyma
Adult COPD: Emphysema
Pathophys:
Inflammatory cells role
Disorders common in COPD:
Emphysema
Picture depiction
- Enlargement and Destruction of alveolar walls
- Walls of alveoli are torn and cannot be repaired
- Alveoli fuse into large air spaces
Chronic Bronchitis think…..
Bronchiole inflammation
Adult COPD: Chronic Bronchitis
What MUST be present in order for it to be Chronic Bronchitis?
Presence of productive cough for 3 mos in each of 2 successive years
Adult COPD: Chronic Bronchitis
Pathophys:
- Irritation leads to hypersecretion of mucus in LARGE airways and progresses to SMALLER airways hypersecretion
- Hypertrophy of submucosal glands
Chronic Bronchitis
Explain role of Goblet Cells
- Make mucus as a defense mechanism
- EVENTUALLY…..mucus clogs everything up!!!
Disorders common in COPD
Chronic Bronchitis
What happens?
- Air tubes narrow as a result of swollen tissues and excess. mucus production
- Enlarged submucosal gland
- Inflammation of epithelium
- Mucus accumulation
- Hyperinflation of alveoli
Decreased recoil in lungs
OR
loss of elasticity in lungs
Adult COPD: Emphysema + Chronic Bronchitis
The cascade of events:
- Risk factors== smoking (most common), air pollution, noxious particles
- causes inflammation of lung
- structural changes and narrowing of small airways w/ hypersecretion
- Destruction of lung parenchyma, resp. bronchioles, alveoli===> Dec. lung recoil (loss of elasticity)
Adult COPD: Emphysema + Chronic Bronchitis
Air TRAPPED in lungs (bad open/closing of Alveoli)
Explain the events:
- Air TRAPPED in lungs
- lose elastic recoil of lungs
-
NOT good control of open/closing of alveoli
- air becomes TRAPPED w/ not enough time to get out!!!
Adult COPD: Emphysema + Chronic Bronchitis
PFT
PFT <60%
Adult COPD: Emphysema + Chronic Bronchitis
ABG
INCd CO2
Adult COPD: Emphysema + Chronic Bronchitis
Auscultation?
LONG Exhalation phase
*Cannot get air OUT!
Adult COPD: Emphysema + Chronic Bronchitis
Posture
Forward head
Rounded shoulders
Kyphosis
Adult COPD: Emphysema + Chronic Bronchitis
Strength
Loss– ESP LE’s
Do MMT, HHD,
Weakness– esp. INSP mm strength
Adult COPD: Emphysema + Chronic Bronchitis
Explain EmPhysema Dominant:
PINK PUFFERS
- EmPhysema has a P, Pink Puffers has P!!!
- Much more frail
- skinny
- Not a lot of coughing
-
***Hypertrophy of Scalenes
- Scalene Triangle*******
Adult COPD: Emphysema + Chronic Bronchitis
Chronic Bronchitis dominant:
Blue Bloaters
-
Bronchitis has a B, Blue Bloaters has a B!!!
- R. sided HF
- Congestion, fluid
- Peripheral edema bc backflow of fluid