Pencil Villain Shared "Respiratory System" - 52 Picmonics
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Respiratory System
Respiratory Anatomy
- Characteristics
- Nasal Cavity
- Hair Filters
- Mucus Filters and Moistens
- Capillaries Warm
- Pharynx (Throat)
- Larynx (Voice Box)
- Cilia Expel Mucus and Dust
- Trachea
- Bronchi
- Alveoli
2 mins
Alveolar Gas Exchange
- Characteristics
- Pulmonary Artery Blood is O2-Poor, CO2-Rich
- Two-Cell Thick Air-Blood Barrier
- CO2 Diffuses Into Air
- O2 Diffuses Into Blood
- Gases Equilibrate
- Pulmonary Vein is O2-Rich, CO2-Poor
- Thermoregulation
2 mins
Physiologic Dead Space (VD)
- Tidal Volume (VT)
- Partial pressure of arterial CO2 (PaCO2)
- Partial pressure of CO2 in expired air (PECO2)
- VD = TV x (PaCO2-PECO2) / PaCO2
2 mins
A-a Gradient
- Partial pressure of alveolar oxygen (PAO2)
- Partial Pressure of Arterial O2 (PaO2)
- Normal 10 to 15 mmHg
- Hypoxemia with an Abnormal A-a Gradient
- Diffusion problem
- Shunting (Low V/Q)
- Dead space (high V/Q)
1 min
Alveolar Gas Equation
- Equation
- Partial Pressure of Alveolar Oxygen (PAO2)
- Partial Pressure of Oxygen in the Inspired Air (PIO2)
- PIO2 Normally Approximated = 150 mmHg
- Arterial Partial Pressure of CO2 (PaCO2)
- Respiratory Quotient (R)
- R Normally Approximated = 0.8
- PAO2 = PIO2 - (PaCO2/R)
1 min
Winter's Formula
- Evaluates Respiratory Compensation
- Used in Metabolic Acidosis
- Equation
- (HCO3 x 1.5 ) + 8 plus-minus 2 = PCO2
- Steps
- Bicarbonate (HCO3) x 1.5
- + 8
- ± 2
- = Expected Value for PCO2
2 mins
Light's Criteria
- Use
- Determines Transudative vs. Exudative Source of Pleural Effusion
- Exudate if (At Least One of the Following):
- Effusion/Serum Protein Ratio > 0.5
- Effusion/Serum LDH Ratio > 0.6
- Effusion LDH > Two-thirds Upper Serum LDH Range
2 mins
Lung Sounds - Wheezes
- Location
- Throughout Lung
- Description
- High Pitched
- Sounds Like
- Musical
- Cause
- Air Moving through Narrowed Airways
38 secs
Lung Sounds - Crackles
- Location
- Lower Lobes
- Description
- Fine/Coarse
- Sounds Like
- Fine: Twisting Hair through Fingers
- Coarse: Velcro
- Cause
- Collapsed Small Airways and Alveoli "Popping Open"
1 min
Lung Sounds - Rhonchi
- Location
- Trachea and Bronchi
- Description
- Low Pitched Rumbling
- Sounds Like
- Gurgling
- Cause
- Narrowed Airway
- Secretions or Bronchospasm
49 secs
Lung Sounds - Pleural Friction Rub
- Location
- Anterior Lateral Lung
- Description
- Dry, Rubbing, or Squeaking
- Sounds Like
- Rubbing a Balloon with Finger
- Cause
- Inflamed Pleura
50 secs
Theophylline
- Indications
- Asthma
- Mechanism
- Inhibits Phosphodiesterase
- Increases cAMP
- Side Effects
- Cardiotoxicity
- Neurotoxicity
- Blocks Adenosine Action
53 secs
Terbutaline (Brethine)
- Mechanism of Action
- Beta-2 Agonists
- Indications
- Asthma
- Tocolytic
- Side Effects
- Hypotension
- Tremor
- Tachycardia
- Pulmonary Edema
- Hyperglycemia
2 mins
Albuterol (Proventil)
- Mechanism
- Short-Acting Beta-2 Agonist
- Indications
- Bronchospasm
- Asthma
- Side Effects
- Angina
- Tachycardia
- Tremor
1 min
Cromolyn (Mast Cell Stabilizers)
- Mechanism
- Mast Cell Stabilizer
- Indications
- Asthma Prophylaxis
- Bronchial Inflammation
- Allergic Rhinitis
- Side Effects
- Cough
- Bronchospasm
- Consideration
- Fixed Schedule Administration
2 mins
Montelukast (Singulair)
- Mechanism
- Leukotriene Receptor Blocker
- Indications
- Allergic Rhinitis
- Asthma Prophylaxis
- Exercise Induced Bronchospasm
- Side Effects
- Fatigue
- Headache
- Mood Changes
- Suicidal Thoughts
- Considerations
- Increased Risk of Churg Strauss
2 mins
Restrictive vs. Obstructive Lung Diseases
- Restrictive Lung Disease
- Decreased Lung Volume
- FEV1/FVC Ratio Normal to Increased
- Obstructive Lung Disease
- Increased Lung Volume
- Decreased FEV1/FVC Ratio
2 mins
Restrictive Lung Diseases
- Poor Breathing Mechanics
- Interstitial Lung Diseases
- Goodpasture's Syndrome
- Eosinophilic Granuloma
- Granulomatosis with Polyangiitis
- Sarcoidosis
- Pneumoconiosis
- Idiopathic Pulmonary Fibrosis
- Drug Toxicity
- Acute Respiratory Distress Syndrome (ARDS)
- Neonatal Respiratory Distress Syndrome
2 mins
Obstructive Lung Disease
- Blocked Airflow
- Increased residual volume
- V/Q Mismatch
- Decreased forced vital capacity (FVC)
- Decreased FEV1/FVC ratio
- Asthma
- Bronchiectasis
- Chronic bronchitis
- Emphysema
51 secs
Chronic Bronchitis
- Pathophysiology
- Chronic Inflammation of Bronchi
- Signs and Symptoms
- Early-Onset Cyanosis
- Blue Bloaters
- Productive Cough
- Wheezing
- Chronic Obstructive Pulmonary Disease (COPD)
- Late-Onset Dyspnea
- Crackles
- Diagnosis
- Reid Index > 50%
2 mins
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