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BVM Ventilation (Apneic Patient)

Category: Procedures Sources: raw/nremt/psychomotor-skills.md, raw/supplemental/patient-assessment-sequence.md Last updated: 2026-04-03

Overview

Bag-valve-mask (BVM) ventilation is the primary EMT-B intervention for a patient with absent or inadequate breathing. It delivers positive-pressure ventilation manually, with or without supplemental oxygen. Proper mask seal and adequate tidal volume are the critical technique elements — a poor seal delivers most of the volume into the air rather than the lungs.

Key Points

  • Indications: Absent breathing (apnea) or inadequate breathing (rate too slow/fast, insufficient depth, agonal respirations)
  • Ventilation rates:
  • Adult: 1 breath every 5–6 seconds (10–12/min)
  • Child: 1 breath every 3–5 seconds (12–20/min)
  • Infant: 1 breath every 3–5 seconds (12–20/min)
  • Tidal volume: Enough to produce visible chest rise — approximately 500–600 mL in adults. Avoid over-ventilation (causes gastric inflation and reduces cardiac output).
  • Airway adjuncts: Always insert an OPA (preferred, unconscious patients with no gag reflex) or NPA (conscious, intact gag, or when OPA cannot be placed) before BVM use.
  • Oxygen connection: Connect O2 at 15 LPM to the BVM reservoir bag. This increases delivered FiO2 from ~21% (room air) to ~100%.
  • Two-rescuer technique: Preferred. One rescuer maintains two-handed mask seal (E-C clamp technique); second rescuer squeezes the bag.
  • One-rescuer technique: Single rescuer holds mask with one hand (C-E grip) and squeezes bag with the other. Maintaining an adequate seal solo is difficult.

Assessment Relevance

BVM need is identified during primary-assessment — specifically the Breathing component. Triggers: - Absent breathing - Breathing rate <8/min or >30/min (adult) with inadequate depth - Agonal respirations (slow, gasping, ineffective) - Inadequate chest rise despite open airway

After initiating BVM, confirm effectiveness by watching for chest rise with each squeeze. If chest does not rise: reposition airway, adjust mask seal, reassess for obstruction.

BVM is the bridge to definitive airway management and is continued throughout cardiac-arrest-aed management.

Procedures

Pre-use Setup

  1. Select appropriate BVM size (adult / child / infant).
  2. Connect O2 tubing to BVM; set flow at 15 LPM; allow reservoir bag to fill.
  3. Select appropriate mask size — should cover nose and mouth without covering eyes or going below chin.

Airway

  1. Position patient supine; tilt head back (or use jaw thrust if trauma suspected — see spinal-immobilization-supine).
  2. Insert OPA or NPA as appropriate.

Mask Seal (Two-Rescuer — Preferred)

  1. Rescuer 1: Place mask on face; use E-C clamp on both sides.
  2. C-grip: thumb and index finger form a "C" around the mask connector
  3. E-grip: remaining three fingers form an "E" along the mandible, lifting the jaw up into the mask
  4. Rescuer 2: Squeeze the bag once every 5–6 seconds (adult); watch for chest rise.

One-Rescuer

  1. Use C-E clamp one-handed; squeeze bag with opposite hand.
  2. Allow full chest recoil between breaths.

Reassessment

  1. After 2 minutes (or 5 cycles), reassess breathing.
  2. If continued BVM is needed, monitor for gastric distension.
  3. Document: time started, rate used, airway adjunct placed, O2 connected.

NM Protocol Notes

  • BVM with OPA/NPA is the highest airway intervention in EMT-B scope in NM. Advanced airways (supraglottic devices) may be in scope depending on the NM system — check current protocol.
  • Two-rescuer BVM is standard; request additional personnel if working solo.
  • During cardiac-arrest-aed management, integrate BVM ventilation with CPR — 30:2 compression-to-ventilation ratio if no advanced airway is in place.

NREMT Relevance

BVM ventilation is a standalone psychomotor skill station. Examiners assess: - Correct airway opening technique (jaw thrust vs head-tilt/chin-lift based on scenario) - Correct airway adjunct insertion before BVM - Proper mask sizing and seal - Adequate ventilation rate — not too fast, not too slow - Visible chest rise - Oxygen connection to BVM - Reassessment after ventilations

Critical failures: inadequate tidal volume (no chest rise), excessive rate (hyperventilation), or failing to open airway before applying mask.

Sources

  • raw/nremt/psychomotor-skills.md — BVM Ventilation (Apneic Patient)
  • raw/supplemental/patient-assessment-sequence.md — Breathing section