What is the stepwise sprint weaning protocol for clinically stable intubated infants, including criteria for spontaneous breathing trials and extubation?

Sprint Weaning Protocol for Intubated Infants

For clinically stable intubated infants, implement a protocolized extubation readiness testing (ERT) bundle that includes daily screening for eligibility, followed by a spontaneous breathing trial (SBT) using CPAP alone (without pressure support) for 30-120 minutes, combined with assessment of airway protection, secretion management, and post-extubation support planning. 1

Stepwise Protocol Implementation

Step 1: Daily Protocolized Screening for Eligibility

• Screen all intubated infants daily (after >24 hours of mechanical ventilation) to determine if they meet criteria for extubation readiness testing 1
• This systematic approach has demonstrated sensitivity of 90% and positive predictive value of 94% for extubation success 1

Eligibility criteria must include:

• Hemodynamic stability without escalating vasopressor support
• Adequate oxygenation (typically FiO₂ ≤0.5, PEEP ≤5-8 cmH₂O)
• Resolution or improvement of the underlying condition requiring intubation
• Appropriate sedation level allowing spontaneous respiratory effort
• Adequate neurologic control of airway (cough, gag reflexes present)

Step 2: Conduct the Spontaneous Breathing Trial (SBT)

For standard-risk infants:

• Use either CPAP alone OR pressure support with CPAP during the SBT 1
• Duration: 30 minutes to 120 minutes (either timeframe is acceptable) 1

For high-risk infants (those with:

• Neuromuscular weakness
• Prolonged ventilation >7 days
• Previous extubation failure
• Significant comorbidities)

Use CPAP without pressure support to better assess true extubation readiness 1

Research in neonates specifically supports ET-CPAP for 30 minutes as highly predictive, with 93.97% positive predictive value and 81.2% sensitivity 2. The rationale for avoiding pressure support in high-risk infants is that endotracheal tubes in neonates are less resistant than previously thought, and pressure support may mask inadequate respiratory effort 3.

Step 3: Complete the ERT Bundle Assessment

Beyond the SBT, simultaneously evaluate:

• Respiratory muscle strength: Measure PiMax (maximal inspiratory pressure) in infants at risk for muscle weakness or extubation failure 1

• Airway leak test: For infants with cuffed endotracheal tubes, perform cuff leak test to assess risk of post-extubation upper airway obstruction 1

• Secretion management: Assess volume and character of airway secretions; infant must demonstrate ability to handle secretions

• Neurologic assessment: Confirm adequate cough strength and gag reflex

Step 4: SBT Monitoring and Failure Criteria

During the SBT, continuously monitor:

• Heart rate
• Respiratory rate
• Oxygen saturation (SpO₂)
• Work of breathing (use Silverman-Andersen score or similar assessment)
• Blood pressure stability

Abort the SBT and return to full ventilatory support if:

• Sustained tachypnea (respiratory rate >60-80/min depending on age)
• Oxygen desaturation (SpO₂ <88-90% sustained)
• Increased work of breathing (retractions, nasal flaring, grunting)
• Hemodynamic instability (bradycardia, hypotension)
• Altered mental status or decreased responsiveness

Step 5: Post-Extubation Planning

For high-risk infants, plan noninvasive respiratory support (NRS) immediately after extubation rather than conventional oxygen therapy 1

High-risk criteria include:

• Age <1 year (particularly preterm infants)
• Prolonged mechanical ventilation
• Previous extubation failure
• Significant underlying lung disease
• Neuromuscular weakness

NRS options include:

• High-flow nasal cannula (HFNC)
• CPAP
• Non-invasive ventilation (NIV)

For infants <1 year being started on NRS, CPAP or NIV is suggested over HFNC alone 1

Step 6: Corticosteroid Administration for Upper Airway Obstruction Risk

Administer dexamethasone at least 6 hours before extubation in infants at high risk of post-extubation upper airway obstruction 1

High-risk indicators:

• Failed cuff leak test
• Prolonged intubation (>7 days)
• Multiple intubation attempts
• History of stridor or airway edema
• Traumatic intubation

Critical Implementation Pitfalls to Avoid

Do not use pressure support during SBT in high-risk infants - this can mask inadequate respiratory drive and lead to extubation failure. The work of breathing during pressure support may not accurately reflect post-extubation demands, particularly at higher respiratory rates (>36/min) where trigger work increases exponentially 3.

Do not delay extubation once SBT is passed - the ERT bundle has demonstrated reduction in PICU length of stay when implemented systematically, with minimal adverse effects and similar rates of unplanned extubation compared to usual care 1.

Do not extubate to room air in high-risk infants - planned NRS significantly reduces extubation failure in this population 1.

Do not rely solely on clinical gestalt - protocolized approaches reduce IMV duration by approximately 20-30 hours compared to physician judgment alone 4, 5, though the evidence certainty is moderate.

Monitoring Post-Extubation

Define extubation success as remaining extubated for 48 hours without requiring reintubation 2, 6, 7

If respiratory distress develops on conventional oxygen therapy post-extubation, escalate to NRS (HFNC, CPAP, or NIV) rather than continuing conventional oxygen alone 1

The overall extubation success rate with this protocolized approach ranges from 75-90% in pediatric populations 2, 4, with reconnection rates of approximately 2% within 30 days when protocols are followed systematically 8.