RD5.4 | Device Position on Adult and Pediatric ICU Chest X-ray — Summary & Reflection

KEY TAKEAWAYS

ICU Device Position on the Chest X-ray — Key Points

• The ICU film is read 'tubes and lines first': trace each device to its tip, judge it against its landmark, then always search for a complication. It is an AP supine portable film — true heart size cannot be assessed.
• ET tube: tip ~3–5 cm above the carina (neutral neck). Too low = right-main-bronchus intubation → left-lung collapse (withdraw); too high = accidental extubation (advance). The tip moves with neck position ('goes where the chin goes').
• CVC: tip at the cavoatrial junction / lower SVC. In the right atrium → arrhythmia/perforation (withdraw); aberrant vein → reposition.
• NG tube: must run in the midline, bisect the carina, tip clearly below the left hemidiaphragm in the stomach. In the airway/oesophagus or above the diaphragm = malpositioned — do NOT feed; replace and re-image (radiography is the gold-standard check).
• Mandatory complication check: after any insertion, exclude a pneumothorax (lung edge, absent peripheral markings; supine deep sulcus sign), haemothorax and surgical emphysema — a correctly placed line can still have caused a pneumothorax.
• Paediatric differences: the short airway and vessels make small migrations proportionally large and more dangerous; use age/size-specific targets (not the adult 3–5 cm figure), expect more movement with neck position, and have a low threshold to re-image.
• Every malposition is paired with its action — withdraw, advance, reposition or replace — and re-imaging.

REFLECT

Imagine you are covering the ICU overnight and a stack of post-insertion films arrives. (1) Do you have a fixed order for tracing every tube and line to its tip, so you never sign off a film having checked only that a device is 'present'? (2) Will you remember, every single time, to finish with the complication search — and specifically to look for a pneumothorax on every post-line film even when the line looks perfectly placed? (3) When the patient is a child, will you consciously switch to paediatric targets and account for the short airway and the tube's movement with neck position, rather than applying the adult 3–5 cm rule? Building these habits now is what turns the device check from a box-ticking glance into the daily, life-saving interpretation skill the ICU demands.