6.1 MR SOPA Ventilation Corrective Steps

Why Corrective Steps Dominate Neonatal Resuscitation

Positive-pressure ventilation (PPV) is the single most important intervention in neonatal resuscitation. When a newborn is apneic, gasping, or has a heart rate below 100 beats per minute after the initial steps, the team starts face-mask PPV at 30–60 breaths per minute. The immediate goal is effective ventilation of the lungs—visible chest movement and, most importantly, a rising heart rate.

If the chest does not move and the heart rate does not rise, the problem is almost always technical: poor mask seal, obstructed airway, insufficient opening pressure, or the wrong interface for this baby. Compressions and epinephrine will not fix an unventilated lung. MR SOPA is the structured way NRP trains you to diagnose and correct ineffective PPV before you escalate along the algorithm.

On the Online Learning Assessment and in simulation, expect questions that present a non-improving heart rate during PPV and ask for the next corrective action—not automatic compressions. The correct reflex is: Is ventilation actually effective? If not, correct it.

The Full MR SOPA Mnemonic

Memorize every letter and what it means in the delivery room:

A common teaching cue is that the first four letters (M–R–S–O) optimize the face-mask airway, P increases the driving pressure, and A changes the device interface entirely.

M — Mask adjustment

Mask problems are the most frequent cause of failed PPV. The mask must cover the mouth and nose without pressing on the eyes and without hanging over the chin. Use a size appropriate for the infant: too large leaks; too small fails to cover both orifices. Hold with a technique that maintains a seal without crushing soft tissues (often taught as a two-point or modified C-E grip depending on device and hand size). If you hear a loud leak, see the cheeks balloon asymmetrically without chest rise, or feel free gas escaping, reseat the mask immediately.

R — Reposition the airway

Newborns have a large occiput. Neutral or slight sniffing position aligns the pharynx; excessive flexion (chin to chest) or hyperextension can kink the airway. A rolled towel under the shoulders of a preterm infant can help maintain alignment. Repositioning is free, fast, and often restores effectiveness after mask reseating.

S — Suction mouth then nose

Secretions, blood, or meconium in the mouth and nose can obstruct. Suction the mouth first, then the nose, so material is not drawn posteriorly when the nose is suctioned. Use appropriate catheter size and brief passes—prolonged suctioning delays ventilation and can cause bradycardia. If thick material is visible and ventilation still fails, suction is justified; do not perform lengthy ritual suctioning when the airway already looks clear and the real problem is seal or pressure.

O — Open the mouth

Even with good head position, a closed mouth and a large tongue can obstruct. Gently open the mouth under the mask and consider a modest jaw lift. This step is easy to skip under stress and frequently appears on exams as the “forgotten” corrective action after mask and position have been tried.

P — Pressure increase

If the airway is open and the seal is good but the chest still does not move, the lungs may need higher opening pressure. Increase PIP gradually—commonly taught in increments of about 5–10 cm H₂O—until you see chest rise and heart-rate improvement. Initial term PIP is often near 20–25 cm H₂O (9th-edition guidance emphasizes adequate starting pressure, including higher starting PIP for many infants ≥32 weeks when indicated by local protocol and response). Avoid jumping straight to the device maximum; barotrauma risk rises with unnecessary high pressure, but inadequate pressure that never opens the lung is also harmful.

Know your device: a T-piece resuscitator changes set PIP and PEEP predictably; a flow-inflating bag requires skilled squeeze control; a self-inflating bag needs a tight seal and may include a pressure-relief valve that must be understood so you are not fighting a pop-off while thinking pressure is rising.

A — Alternative airway

If corrected face-mask PPV still fails, place an alternative advanced airway: endotracheal tube or laryngeal mask. In NRP 9th Edition the LMA is recognized as a primary advanced-airway option, not only a last-ditch rescue after failed intubation (details in the laryngeal-mask section). The “A” step is device escalation, not free-flow oxygen or a higher FiO₂ alone.

9th Edition Flexibility: Prioritize the Most Likely Problem

Older teaching often presented MR SOPA as a strict left-to-right march: always M, then R, then S, then O, then P, then A. NRP 9th Edition keeps the full mnemonic but emphasizes clinical flexibility. You still must know every letter, but you apply steps in an order that attacks the most likely problem first rather than wasting time on low-probability adjustments when the cause is already obvious.

Examples of flexible prioritization:

• Obvious large mask leak with the head already well positioned → fix M (and recheck R) immediately; do not suction a clear airway first.
• Visible thick secretions pouring from the mouth with no chest rise → prioritize S (mouth then nose) early.
• Chest never moves despite excellent seal and open appearance → move more quickly to P, then A, rather than repeating endless mask micro-adjustments.
• Known difficult airway anatomy or failed prolonged mask PPV → do not delay A forever while cycling the first letters without progress.

Flexibility is not permission to skip assessment or to invent steps outside the mnemonic. It means: use judgment, fix the rate-limiting problem, and reassess. Exam items may still list the classic order; answers that scramble the letters randomly are wrong, but scenarios that reward addressing an obvious obstruction before an irrelevant step reflect modern practice.

The Five-Breath Reassessment Habit

After each meaningful corrective adjustment, deliver a short series of ventilations—commonly taught as about five breaths—and reassess:

1. Does the chest rise with each breath?
2. Is the heart rate rising (auscultation and/or ECG monitor)?
3. Is the color/SpO₂ improving once a reliable signal is available?

This “correct → ventilate briefly → reassess” loop prevents two errors: stacking every MR SOPA letter without ever checking whether the last fix worked, and abandoning a successful correction too early. Heart-rate rise remains the best single indicator that alveolar ventilation is occurring.

If chest movement and heart rate improve, continue effective PPV at 30–60/min and monitor—you have solved the problem without unnecessary pressure or advanced airway. If they do not improve after appropriate corrections, escalate along the mnemonic, including alternative airway when indicated.

Integrating MR SOPA With the Algorithm Clock

• Golden Minute: Initial steps and start of PPV when indicated should occur promptly; do not spend the first minute performing elaborate suction rituals if the baby needs ventilation.
• During PPV: Assess heart rate frequently. If HR remains <100, ensure ventilation is effective (MR SOPA) before assuming the baby needs something else.
• Before compressions: Chest compressions are indicated for HR <60 after at least 30 seconds of effective PPV. “Effective” implies chest movement—so incomplete MR SOPA work is not a free pass to start compressions on a still-unventilated infant.
• Team communication: Call out findings: “No chest rise—reseating mask and repositioning head,” then “Chest rise present, heart rate rising to 120.” Closed-loop statements keep the leader and recorder synchronized.

Exam traps

• Starting compressions for HR 70–90 during PPV without first ensuring ventilation effectiveness.
• Confusing P (pressure increase) with immediately giving 100% oxygen or epinephrine.
• Treating A as “add an orogastric tube only” (OG tubes help vent the stomach during prolonged mask PPV but are not the alternative airway).
• Rigidly refusing to suction when secretions are the obvious problem, or suctioning forever when the seal is the problem.
• Listing MR SOPA letters incorrectly (especially swapping S/O or calling A “apgar” or “adrenaline”).

Master the mnemonic, practice the five-breath reassessments, and think flexibly about the most likely failure point. That combination is how NRP expects you to rescue failed face-mask ventilation.