Guidelines for Managing Elevated Right Hemidiaphragm After Intubation

Immediate Assessment (DOPE Mnemonic)

Displacement of the endotracheal tube (e.g., esophageal placement or right‑mainstem intubation) should be considered first. 1
Obstruction of the tube by mucus plugs or kinks is a common reversible cause. 1
Pneumothorax must be ruled out, especially when high airway pressures are used. 4
Equipment failure (e.g., ventilator malfunction) should be evaluated promptly. 5

Waveform capnography is the most reliable continuous method to confirm tracheal placement, but it does not exclude right‑mainstem intubation. [1][6]7
Chest radiography is required to verify that the tube is not lodged in a bronchus and to ensure mid‑tracheal positioning. Malposition rates range from 12–15 %, with some series reporting 28–46 % of tubes malpositioned on insertion. [1][3]8

Bilateral chest movement and equal breath sounds over both lung fields (especially the axillae) support correct tube placement. 1
Unequal chest expansion suggests right‑mainstem intubation with left‑lung collapse and apparent right‑hemidiaphragm elevation. 7
Asymmetric breath sounds are also indicative of right‑mainstem intubation. [1][8]

Right‑mainstem intubation is the most frequent malposition causing apparent hemidiaphragm elevation.
Phrenic nerve injury from intubation trauma can produce progressive respiratory distress and difficulty weaning from ventilation. [4][5]
Pneumothorax may result from barotrauma, especially with:
- High airway pressures – 4
- Breath‑stacking (auto‑PEEP) – 3
- Pre‑existing lung disease – [2][3]

Verify tube depth at the incisors against the documented insertion depth; incisor‑based repositioning alone is inaccurate and must be followed by radiography. [1][5]8
Inspect for surgical emphysema, which can indicate airway trauma. 5

Chest radiography remains essential to confirm tube position, exclude pneumothorax, and differentiate true diaphragm elevation from lung collapse. [1][3]8

Most cases are transient; provide supportive mechanical ventilation as needed. [4][1]

Insert a chest tube immediately for tension pneumothorax. 1
Adjust ventilator settings to reduce auto‑PEEP: tidal volume 6–8 mL/kg, slower respiratory rate, and longer expiratory time. [2][3]

Physical examination alone predicts tube malposition in only 3 % of cases, compared with 14–28 % detection by radiography. 8
Do not rely on incisor measurements for tube repositioning without confirmatory imaging. 8
Capnography confirms tracheal placement only; it does not rule out right‑mainstem intubation. 1
Maintain the head in neutral position after securing the tube; neck flexion pushes the tube deeper, while extension may pull it out. 1

Continuous waveform capnography should be maintained throughout ventilation. [6][7]
Re‑assess tube position after any patient movement, transport, or repositioning. 1
Watch for “red‑flag” signs: loss or alteration of capnograph waveform, rising airway pressures, decreasing tidal volumes, or inability to pass a suction catheter. 5