Respiratory/ARDS/ETT/Vents/Sedation Flashcards
Normal pH
7.35-7.45
Normal PaCo2
35-45 mmHg
Normal HCO3
22-26 mEq/L
Normal PaO2
80-100 mmHg
Normal SaO2
> 95%
Acute Respiratory Failure: Early S/S
- restlessness
- tachycardia
- HTN
- fatigue
- HA
- tachypnea
Acute Respiratory Failure: Later S/S
- confusion
- lethargy
- central cyanosis
- diaphoresis
- respiratory arrest
- fast RR slowing down
First Sign of Respiratory Failure
mental status change
S/S of Inadequate CO2 Removal
- morning HA
- slower respiratory rate
- decreased LOC
Auscultating Inspiratory Crackles means there is…
pulmonary edema
Auscultating Expiratory Crackles
PNA or COPD
Auscultating Absent of Diminished Breath Sounds
- atelectasis
- effusion
- hypoventilation
How does ARDS look on x-ray?
White-out
ARDS: S/S
- sudden or slowly progressive pulmonary edema
- increasing bilateral lung infiltrates
- absence of left atrial pressure
- rapid onset of severe dyspnea and V/Q mismatch <72 hours after precipitating event (hypoxemia that doesn’t respond to supplemental O2; crackles, intercostal retractions and BNP levels)
PaO2/FiO2 (P/F) Ratio Values
- Normal: >400
- Mild: >200 to <300
- Moderate: 100 to <200
- Severe: <100
ARDS: Injury or Exudative Phase
- 1-7 days (usually 24-48 hours) after insult
- Path: interstitial and alveolar edema, atelectasis, decreased surfactant production, refractory hypoxemia
- Intervention: intubation d/t increased WOB
- RECOVERABLE
ARDS: Reparative or Proliferative Phase
- 1-2 weeks after initial lung injury
- Patho: inflammatory response continues, lung compliance worsens, lung becomes dense, fibrous
- Intervention: continue mechanical ventilation and lung support, prevent failure of other organs (MODS d/t poor perfusion)
ARDS: Fibrotic Phase
- 2-3 weeks after initial injury
- Patho: lung is remodeled by collagenous and fibrous tissues, pulmonary HTN
- Intervention: long term mechanical vent
BNP
- normal: <100pg/mL
- helpful in distinguishing ARDS from cariogenic pulmonary edema (it is high in ARDS)
ARDS: Medical Management
- ID and treat underlying cause
- Intubation, mechanical ventilation with PEEP to keep alveoli open
- treat hypovolemia to keep hemodynamically stable
- Prone positioning is best for oxygenation
- nutrition support (enteral feedings preferred)
- Reduce anxiety, sedation, paralysis
ARDS: Risk Factors
- aspiration
- COVID-19 PNA
- drug ingestion and overdose
- fat or air embolism
- hematologic disorders
- localized infection
- major surgery
- metabolic disorders
- prolonged inhalation of high concentrations of O2, smoke, or corrosive substances
- sepsis
- shock (any cause)
- trauma
ARDS: Nutritional Therapy
- require 35-45 kcal/kg/day to meet caloric requirements
- enteral feeds is the first consideration, but parenteral nutrition also may be required
Why ETT?
- provides patent airway
- access for mechanical ventilation
- facilitates removal of secretions
Intubated Patient Nursing Considerations
- ETT size
- location
- mouth care
- sedation level (LOC, RASS)
- Positioning (prone, 30 degrees or higher)
- respiratory assessment
- equipment assessment
- interprofessional team
Can the patient eat or drink immediately after extubation?
- NO
- patient needs to be evaluated by speech and swallow
Barotrauma
- air goes into pleural space and is unable to escape
- can lead to pneumothorax
Volutrauma
- too much tidal volume
- leads to subcutaneous emphysema
Pneumothorax
- absent breath sounds
- bag the patient, 8-10 breaths per minute
- Patient will be getting a chest tube
Trach Cuff Pressure
between 20-25 mmHg
Intubation for no longer than…
14-21 days (after will require a tracheostomy