Pulmonary Flashcards
Name the Causes of ARDS (10)
ARDS
A= Aspiration vs. [Acute Pancreatitis] vs. [Air Fluid Embolus (amniotic)]
R= Radiation
D= Drugs vs. DIC vs. Drowning
S= Sepsis vs. Smoking vs. Shock
ARDS is a restrictive pattern that –> ⬇︎Lung Compliance, Pulm HTN and impaired gas exchange
Tx for ARDS
PEEP (Positive End Expiratory Pressure)
Based on GOLD Criteria, how should COPD pts be treated?
What are the 3 criteria for COPD Exacerbation
COPD
[Cough ⇪ with (Oral-Lung SPUTUM ∆ )]
[Pulmonary WHEEZING BL ➜ respiratory acidosis]
Dyspnea
Tx for COPD Exacerbation-4
“I’m having COPD Exacerbation! Give me DOPA! (but not really)”
- Duoneb (albuterol + ipratropium)
- O2 PRN via BiPAP (goal: 90-94% O2 Sat)
- [Prednisone 40 mg qd x 5]
- Abx (Azithro-⬇︎future events or Levoflox or Doxy)
Out of the Tx for COPD Exacerbation
Which improves survival?
________________
Which ⬇︎future events?
“I’m having COPD Exacerbation! Give me DOPA! (but not really)”
[O2 PRN via BiPAP (goal: 90-94% O2 Sat)]
________________
Abx (Azithro-⬇︎future events or Levoflox or Doxy)
Difference between [Dead Space Ventilation] and [Physiological shunting]
________________
Which causes Hypoxemia?
[Dead Space Ventilation] = [Ventilation with no perfusion]
________________
[Physiological shunting] = [Perfusion with no ventilation (think PNA)] ➜ [HYPOXEMIA refractory to supplemental O2]➜ SHUNTING of blood to better ventilated areas
What mediastinal masses are found in the…
A: Anterior mediastinum
B: Middle mediastinum
C: Posterior mediastinum
A: Anterior = Thymoma
B: Middle = Bronchogenic Cyst
C: Posterior = Neurogenic tumors (Meningocele/Lymphomas/Esophageal tumors)
For pts on ventilators, what are the best ventilator setting changes for ⬆︎ oxygenation-2 and why
- INC PEEP ( prevents alveolar collapse/Reopens old ones/Reduces shunting) AND Reduces mortality in ARDS pts
- INC FiO2 (note: >60% for long time–>proinflammatory O2 free radicals!)
Most common sx of Pulmonary Embolism-5
- Pleuritic Chest Pain
- SOB
- Cough
- Tachypnea
- Tachycardia
Physical Exam: Rales, low Fever, Hemoptysis
(LTOT-Long Term Oxygen Therapy) improves survival in Stage 4 COPD pts
When is LTOT indicated-3
________________
how many hours per day is it used?
- [PaO2 ≤55 mm Hg] OR
- [SaO2 ≤88] OR
- FEV1 < 30%
________________
used ≥15 hours/day!
In Cor Pulmonale pts, PaO2 LOE 59 or SaO2 LOE 89
Describe the Approach to a PE pt
W
L I H
P P D
N N P
N N i
________________
- Wells = Don’t Die | Tell Team To | Calculate Criteria*
- PERC = BREATHS*
Bronchiectasis Etx
Recurrent
[Poor mucociliary clearance] –> Bacterial infection –> Inflammation –> Bronchial Dilation and thickening–> [tenacious productive cough w/ hemopytsis]
________________
Dx = High Res CT Chest
Gold standard dx for Bronchiectasis
High Res CT chest scan (initial dx)
List the Obstructive causes of Bronchiectasis (2)
A:
1) Tumor
2) Foreign Body
List the Infectious causes of Bronchiectasis (2)
1) TB
2) [Aspergillus Fumigatus in ABPA]-Allergic BronchoPulmonary Aspergillosis] –> will be associated with [recurrent transient pulm infiltrates]
List the Congenital causes of Bronchiectasis (3)
1) Immunodeficient Syndromes
2) cystic fibrosis
3) Kartagener (1° Ciliary Dyskinesia)
List the Random causes of Bronchiectasis (3)
1) Rheumatoid Arthritis
2) Lupus
3) Graft
What is the most common cause of Hemoptysis
Bronchitis (usually [acute s/p viral infection] but could be chronic also)
Tx = supportive
Also think about: Bronchiectsis/TB/CA/Trauma/PE
Describe Bronchial Breath Sounds-2
[Loud-LONG EXPIRATION]
+
[Loud-short inspiration]
What does Bronchial breath sounds indicate?
________________
Where in the body are Bronchial bs normal?
Pulmonary Consolidation (alveoli are full of blood/pus/water–> SHUNT)
________________
OVER THE TRACHEA
Name Drugs that cause Asthma exacerbation and why-4
- NSAIDs (pushes Arachodonic Acid pathway to leukotriene production)
- ASA (pushes Arachodonic Acid pathway to leukotriene production)
- General B Blockers (bronchospasms)
- MgSO4 (⬆︎Histamine)
What’s the most significant finding in this CXR and what does it indicate?
Westermark Sign! = Pulmonary Embolus!
Formula for Alveolar-arterial oxygen gradient
Normal Alveolar-arterial oxygen difference is Less than ⬜ .
________________
What does Higher difference indicate?
[(Age/4) + 4]
________________
there’s something blocking O2 transport from Alveoli ➜ artery
CXR findings for PE -3
- Westermark sign
- Hampton’s hump (pulmonary infarction distal to thrombus)]
- [Elevated hemidiaphragm 2/2 Atelectasis]
Indications for IVC Filter -2
- Anticoagulation ctx
- Recurrent DVT/PE despite anticoag
Family hx of Thrombosis is best indicator for inherited hypercoagulability
Name the common inherited hypercoagulable diseases-5
- Antiphospholipid Syndrome
- Factor 5 Leiden
- ⬆︎ Factor 8
- Prothrombin 20210 mutation
- Hyperhomocysteinemia
List 2 major signs of impending respiratory failure
- Conversational Dyspnea
- Abd paradoxus (abd moves inward during inspiration = diaphragmatic fatigue)
Hospitalization, Nursing homes, abx use are common causes of healthcare-associated PNA
Name UnCommon causes of healthcare-associated PNA-5
- Hemodialysis
- Family member w/MDR pathogen
- Outpatient wound care
- Gastric acid suppressants (PPI, H2 blocker)
- Tube feedings
Which bacteria cause PNA in Immunodeficient pts -4
NACS
- Neg gram rods (NEUTROPENIC PTS)
- Aspergillus
- Candida
- Staph A
Tx for Healthcare associated PNA 2/2 Pseudomonas -2
[Piperacillin/Tazobactam] vs. cefTAZidime
“Zoe needs Pipe from Tae“(Piperacillin / Tazobactam)
Supplemental O2 should be given with what O2 Sat goal?
________________
Why is this?
90-94 %
________________
below 90% –> HUGE ⬇︎ Hb Saturation
Dead Space % is represented in formulas by ____ and is defined as ____
VD/VT ; % of Tidal volume that is NOT partcipating in gas exchange (anatomic vs physiologic)
⬜% of Tidal Volume (VT) is normally Dead Space
What conditions ⬆︎Dead space -3
Normally, 30% of VT is Dead Space
_________________
- PE
- Pulmonary HTN
- Volume Depletion
Name the Conditions in which Diffusion Capacity is INCREASED (3)
A: [CHF vs. Polycythemia vs. Hemorrhage] –> INC DLCO
**All others (PILEA) DEC diffusion capacity**
What is FDG-PET? How are results interpreted?-3
fluorodeoxyglucose (FDG)-positron emission tomography (PET)
Pt is given radioactive sugar water –> taken up my tumor as main source of energy–> SUV (Standard uptake value)
>3 SUV = Malignant
2 - 3 = Inderterminate
<2 = benign
not good for Brain/Liver/Kidney CA
What are the Cons of FDG-PET?
NOT good for Brain/Liver/Kidney CA
What are the minimal PFT requirements before Lung CA resection - 2 ;
[PreOp FEV1 GOE 2L] or [Predicted PostOp FEV1 GOE 0.8L]
If MD expects to resect 25% Lung volume and pt PreOp FEV1 is 1.5 L, then Predicted PostOp FEV1 will = 1.125 L
Describe the system used to diagnose DVT
Wells Criteria!
DVT tx - 2
[Therapeutic (Heparin v Enoxaparin)] now
________________ ➜
[Px (Warfarin v NOAC)] x 3 mo
Advantages of Enoxaparin over Unfractionated Heparin - 4
Enoxaparin…
- Longer half life = administered SubQ qD/BID (but note: this also means it takes longer to reverse if surgery is needed)
- No Lab monitoring
- FIXED Dosing
- ⬇︎probability of HIT Thrombocytopenia
You hear Stridor in a patient
What is your DDx?-4
________________
How can you differeniate between them?
Biphasic = Inspiratory AND Expiratory (Vascular Ring)
LaryngoMalcia: Laying down is Malicious (Supine worsens Stridor)
Tx for Croup
Nebulized Racemic Epi breathing tx
Laryngomalacia Etx
Collapse of supraglottic structures during inspiration –> Laying down is Malicious (LaryngoMalacia) = Supine worsens Stridor
Asthma Etx
Excess TH2 cells (recruited by hypersensitive APC to inhaled allergens) secrete IL4 –>activates [B-lymphocyte class switching for IgE Ab]–> IgE binds to Mast cells which will then secrete IL5 –> Recruits Eosinophils–>which release mediators like Leukotrienes.
List the 5 Step Asthma action plan based on
SABA use -4
List the 5 Step Asthma action plan based on
Nighttime Awakenings -4
Describe Kerley B lines and what they represent
Interstitial fluid in lung tissue appearing as 3 cm linear densities in lung periphery = CHF
Orthopnea differs from Paroxysmal Nocturnal Dyspnea in that it occurs while pt is awake EVERY time they lie down
Which conditions are associated with Orthopnea? - 6
- CHF which can –> Pulmonary Edema
- Pulmonary edema
- Asthma
- Chronic Bronchitis
- OSA
- Panic Disorder
Why is an inspiratory hold maneuver performed?
To measure the pulmonary compliance (sum of the elastic pressure) so that the PEEP can be matched with that
Common side effects for Beta 2 agonist - 4
- hypOkalemia –> muscle weakness, arrhythmias
- Palpitations
- Tremor
- HA
Imaging findings for Bronchogenic Carcinoma - 3
________________
Asbestos –> Bronchogenic carcinoma > mesothelioma
- [BL Pleural Plaques and thickening] (pleural mesothelioma will have uL pleural ∆ )
- Honeycoming (cystic areas surrounded by interstitial infiltrates)
- BL CENTRAL reticulonodular infiltrates
__________________
smoking enhances asbestos damage. SOB comes from fibrosis, NOT pleural calcifications
Which pulmonry process targets the bilateral lower lobes of the lung?
AAT-Alpha 1 antitrypsin deficiency –> Panacinar Basilar predominant emphysema –> ⬇︎Bilateral Breath Sounds
________________
Smoking –> Upper lobe centriacinar emphysema