Medicine - Pulm 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 is the 4 Criteria for COPD Exacerbation
- SOB
- ⬆︎Cough
- Sputum ∆
- BL wheezing w/ respiratory acidosis
Tx for COPD Exacerbation-4
Which improves survival? Which ⬇︎future events?
“I’m having COPD Exacerbation! Give me DOPA! (but not really)”
- Duoneb (albuterol + ipratropium)
- O2 PRN via BiPAP (goal: 90-94% O2 Sat) -only when desat
- [Prednisone 40 mg qd x 5]
- Abx (Azithro-⬇︎future events or Levoflox or Doxy)
Criteria for Pulmonary HTN ; What are causes?-7
Pulm Arterial presure ≥25 (normal = 20);
- L Heart Dz = MOST COMMON
- Drugs (see image)
- [Limited CREST Scleroderma]
- SLE
- Recurrent VTE
- Idiopathic Primary
- Chronic Lung Dz
Difference between [Dead Space Ventilation] and [Physiological shunting]; Which causes Hypoxemia?
[Dead Space Ventilation] = Area of Lung that has Good Ventilation but poor perfusion
vs.
[Physiological Shunting] = Area of Lung with POOR Ventilation but good perfusion which—> physiological shunting –> Hypoxemia (Think PNA) - “You’ll get Shunts when the [VP is PG” = Ventilation Poor but Perfusion is Good]
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 and how long/day is it used?
- [PaO2 LOE 55 mm Hg] OR
- [Pulse Ox SaO2 LOE 88] OR
- FEV1 < 30%
should be used GOE 15 hours/day!
In Cor Pulmonale pts, PaO2 LOE 59 or SaO2 LOE 89
Describe the Approach to a PE pt
Classic Sx of Sarcoidosis-8
CCUBBEDD
Cardiac (Restrictive Cardiomyopathy)
HYPERCalcemia
Uveitis –> Vision loss
Bilateral Hilar LAD!
Bell’s Palsy
Erythema Nodosum (SubQ Fat lesions)
[Dry cough & Dyspnea]
Diffuse interstitial fibrosis
- elevated ACE and 1-25VitD production –> HYPERCalcemia and HYPERCalciuria*
- Image showing b/l Hilar LAD*
Sarcoidosis Etx-2 (Etiology)
[CD4 Helper T] inappropriately respond to environmental triggers + Suppressed TRegs –> Non-Caseating Granulomas in Lung
Image showing b/l Hilar LAD
Sarcoidosis Tx-4
“Sarcoidosis is a SCAM”
Steroids
Cyclosporine
Azathioprine
MTX
Image showing b/l Hilar LAD
How long does it take Malignant Pulm Nodules to double in size? How does this affect diagnostics?
1 month - 1 year; Pt with stable Pulm Nodule > 1 year = NO CA!
Bronchiectasis Etx
Recurrent Cycle of
[Poor mucociliary clearance –> Bacterial infection –> Inflammation –> Bronchial Dilation and thickening–> Cough w/tenacious sputum and Hemoptysis]
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 short inspiration]
+
[Loud LONG EXPIRATION]
What does Bronchial breath sounds indicate?-3 Where in the body are Bronchial bs normal?
Alveoli are full of blood/pus/water= Pulmonary Consolidation–> SHUNT;
THIS IS NORMAL OVER THE TRACHEA
Which bacteria cause Community Acquired PNA-8
- Strep Pneumo
- H. Flu
- Moraxella
- MRSA
- Mycoplasma pneumoniae-AT (ATypical)
- Chlamydophila pneumoniae-AT
- Chlamydophila Psittaci-AT
- Legionella-AT
Which NON-bacteria cause Community Acquired PNA-3
- Flu
- TB
- Histoplasmosis
What determines whether or not Community Acquired PNA is admitted?
If pt has 1 of the CURB 65
Confusion
BUN > 19
Respiratory Rate > 30
BP: Systolic < 90
65 y/o or older
Tx for Community Acquired PNA-4
- CefTriaxone
- CefTriaxone + Azithromycin
- Levofloxacin (For inpatient vs. Severe Outpatient)
- Vanc (MRSA suspicion only)
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?
CXR findings for PE -4
- Elevated hemidiaphragm
- Atelectasis
- Westermark sign
- Hampton’s Hump
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
Tx for Healthcare associated PNA 2/2 Pseudomonas -2
Zosyn 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
How does Cirrhosis cause Hypoxia?
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
Name the Conditions in which Diffusion Capacity is INCREASED (3)
A: [CHF vs. Polycythemia vs. Hemorrhage] –> INC DLCO
**All others (PILEA) DEC diffusion capacity**
Define [Solitary Pulmonary Nodule]
Single Lung nodule 1-6 cm that does NOT invade
Pt with hemoptysis comes in with [Coin lesion on CXR]
What determines whether or not she needs w/u?
1ST: LOCATE PREVIOUS (At least 1 year prior or older) CXR! If lesion unchanged = NO CA
Coin lesions = 80% chance malignancy
3 characteristics of pulmonary nodules tht make them more likely to be Malignant
- Size: Bigger is worst
- Border: Spiculated / Retracted from surrounding tissue / irregular
- Location: Endobronchial proximal extension/Local invasion/Satellite Nodules
DDx for Solitary Pulmonary Nodule -5
- CA: hamartoma/metastasis/primary
- Infectious: granulomatous/fungal (blasto,histo)
- Pneumoconiosis
- Vasculitis
- Scar
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
1st: Therapeutic Heparin vs Lovenox
2nd: [Warfarin px vs NOAC] x at least 3 months
Advantages of Lovenox over Unfractionated Heparin - 4
Lovenox…
- Longer half life = administered SubQ only 1-2/day (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
and
Nighttime Awakenings