What is pressure support ventilation with a pressure support level of 10 cm H₂O and a positive end‑expiratory pressure of 5 cm H₂O?

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Last updated: September 29, 2026 • View editorial policy

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Pressure Support Ventilation 10/5

Pressure support ventilation 10/5 refers to a patient-triggered mode of assisted spontaneous breathing where the ventilator delivers 10 cm H₂O of inspiratory pressure support above a baseline positive end-expiratory pressure (PEEP) of 5 cm H₂O.

How It Works

In pressure support (PS) mode, the patient's own respiratory effort triggers the ventilator both to initiate and terminate each breath 1. This means:

  • Respiratory frequency and timing are entirely patient-controlled — the ventilator does not deliver mandatory breaths unless a backup rate is programmed 1
  • The "10" represents inspiratory pressure support (IPAP) — when the patient triggers a breath, the ventilator delivers positive pressure of 10 cm H₂O above baseline
  • The "5" represents PEEP (or EPAP) — a continuous baseline pressure of 5 cm H₂O maintained throughout the respiratory cycle 1

The actual pressure delivered during inspiration is therefore 15 cm H₂O total (10 + 5), though clinicians typically refer to this as "10 over 5" to distinguish the inspiratory support from the expiratory baseline.

Physiological Effects

Pressure support reduces work of breathing by providing inspiratory assistance proportional to the patient's effort. The 10 cm H₂O support level helps overcome airway resistance and reduces the pressure-time product generated by respiratory muscles 1.

The 5 cm H₂O PEEP serves multiple functions 1:

  • Offsets intrinsic PEEP (PEEPi) in patients with airflow limitation, making it easier to trigger the ventilator 1
  • Recruits collapsed alveoli and improves oxygenation
  • Reduces inspiratory work by counterbalancing auto-PEEP

In patients with COPD who have significant PEEPi (often 10-15 cm H₂O), the 5 cm H₂O PEEP helps overcome the inspiratory threshold load that would otherwise prevent effective triggering 1. However, EPAP levels above 5 cm H₂O are rarely tolerated in these patients 1.

Clinical Considerations

This is a moderate level of support — the 10 cm H₂O pressure support represents an intermediate assistance level. According to recent evidence, initial spontaneous breathing trials often use 5-8 cm H₂O of pressure support 2, making 10 cm H₂O a reasonable support level for patients not yet ready for liberation.

Patient effort determines all breath timing — if the patient stops making respiratory effort, no breaths will be delivered unless the ventilator has a backup rate programmed (typically 6-8 breaths/minute on modern machines) 1. This makes PS mode inappropriate for patients with unreliable respiratory drive.

Risk of central apneas during sleep — excessive pressure support can cause hyperventilation, dropping PaCO₂ below the apneic threshold and triggering central apneas 3. A 10 cm H₂O support level carries moderate risk for this complication, particularly in patients with heart failure. If periodic breathing develops, consider reducing the pressure support level or switching to assist-control mode with backup ventilation 3.

Triggering sensitivity is critical — the ventilator must detect the patient's inspiratory effort through changes in flow or pressure 1. Excessive mask leak can impair trigger function and cause patient-ventilator asynchrony 1.

Common Pitfalls

  • Inadequate support in high PEEPi patients: If a COPD patient has PEEPi of 12 cm H₂O, the 5 cm H₂O PEEP only partially offsets this, and they must still generate 7 cm H₂O of negative pressure before triggering occurs 4
  • Over-assistance during sleep: The 10 cm H₂O support may be excessive when metabolic demands decrease during sleep, potentially causing central apneas 3
  • Assuming adequate ventilation: Just because settings are "10/5" doesn't guarantee appropriate minute ventilation — monitor tidal volumes, respiratory rate, and blood gases to ensure the support level matches patient needs 5

References

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This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.