Frances Shared "Gas Exchange" - 51 Picmonics
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Gas Exchange
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
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
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
Hypoxia (Early Symptoms)
- Diaphoresis
- Restlessness
- Tachypnea
- Dyspnea on Exertion
- Tachycardia
- Hypertension
- Arrhythmias
- Decreased Urine Output
- Unexplained Fatigue
1 min
Hypoxia (Late Symptoms)
- Cyanosis
- Cool, Clammy Skin
- Use of Accessory Muscles
- Retractions
- Hypotension
- Arrhythmias
2 mins
COPD Overview (Chronic Obstructive Pulmonary Disease Overview)
- Causes
- Inhaled Toxins
- Smoking
- AAT Deficiency
- Assessment
- Emphysema
- Chronic Bronchitis
- Asthma
- Considerations
- Spirometry
- Slow Progression
2 mins
Asthma Assessment
- Assessment
- Triggers (Cold air, Dander, Dust, Infection, Mold, Pollen, Smoke)
- Shortness of Breath (SOB)
- Tachypnea and Tachycardia
- Wheezing
- Diaphoresis
- Accessory Muscles
- Decreased Pulmonary Function Tests
2 mins
Asthma Implementation and Education
- Medication
- Oxygen
- Corticosteroids
- Ipratropium (Anticholinergic)
- Albuterol
- Implementation
- Inhaler/nebulizer
- Pulse Oximetry
- Pursed Lip Breathing
- Education
- Carry Inhaler
- Rinse Mouth after Inhaler
- Identify Trigger (Cold Air, Dander, Dust, Infection, Mold, Pollen, Smoke)
2 mins
Chronic Bronchitis Assessment
- Clinical Findings
- Chronic Productive Cough
- > 3 Months for 2 Years
- Increased Mucus Production
- Dyspnea
- Cyanosis
- Wheezes
- Complications
- Right Side Heart Failure
- Jugular Venous Distention (JVD)
- Peripheral Edema
2 mins
Chronic Bronchitis Interventions
- Tripod Position
- Humidified Oxygen
- Pursed Lip Breathing
- Increase Fluid Intake
- ABGs
- Early Detection of Exacerbation
- Considerations
- Lowest O2 Therapy
- Assisted Ventilation
- Increased Infection Risk
2 mins
Emphysema
- Mechanism
- Hyperinflation and Loss of Elasticity
- Assessment
- Pursed Lip Breathing
- Barrel Chest
- Dyspnea on Exertion
- Clubbing
- Depression and Anxiety
- Thin Appearance
- Nursing Considerations
- CO2 Retention
- Low Concentration of O2
- High Fowler's Position
- High Calorie, High Protein Diet
2 mins
Pneumonia Assessment
- Risk Factors
- Older Adult
- Immunocompromised
- Long Term Care
- Assessment
- Shortness of Breath (SOB)
- Hypoxemia
- Cough and Sputum Production
- Wheezing or Crackles
- Fever
- Pleuritic Pain
- Diagnosis
- Chest X-ray
2 mins
