How to Dictate a Portable Chest X-ray: Lines, Tubes, and the ICU Report

The portable chest X-ray is the highest-volume study you will ever read and the one nobody teaches you to dictate. On a normal call night the ICU list is forty of them, each read in under a minute, and the intensivist skims each report for exactly two things: where the hardware is, and whether the lungs changed. A report that answers those two questions in the first three lines is a good report. Everything else is commentary.

Start with the technique, because the technique lies

Every portable is AP, most are supine or semi-upright, and many are taken at low lung volumes on a sedated patient. That combination manufactures pathology: the heart magnifies, the vessels crowd, the bases whiten. Before you dictate "interval worsening of bibasilar opacities," look at the carina-to-diaphragm distance on today's film and yesterday's. A shallower breath explains more "worsening" than any disease does. Rotation does the same for the mediastinum — check the clavicular heads against the spinous process before you call a wide mediastinum on a trauma portable.

Say the positioning in the technique line ("supine portable") because it changes what the film can show, which brings us to the physics below.

Lines and tubes: the numbers

Dictate every support device, every time, with a position — not "lines and tubes unchanged" unless you have personally verified each one. The numbers worth memorizing:

• Endotracheal tube: tip 3–5 cm above the carina with the neck neutral. The tube moves with the head — roughly 2 cm down with flexion, 2 cm up with extension ("the hose follows the nose") — which is why a tip at 2.5 cm is worth a sentence, not silence. A tip in the right mainstem bronchus gets a call, documented in the report.
• Enteric tube: the tip and the side port must be below the gastroesophageal junction; for feeding, the tip should sit at least 10 cm beyond the GEJ, and post-pyloric if that was the goal. Trace the entire course. The lethal miss is the tube that follows the right bronchus into the lung — if the course parallels the bronchial tree or the tip projects over the lung, say so and call before anyone feeds through it.
• Central venous catheter / PICC: tip at the cavoatrial junction or lower superior vena cava. A left-sided catheter that fails to cross the midline may be in the azygos or an artery; a tip deep in the right atrium earns a recommendation to withdraw.
• Pulmonary artery catheter: tip in the main, right, or left pulmonary artery, within about 2 cm of the hilum. A tip out in a segmental branch is a pulmonary infarct waiting to happen — say "distal, recommend withdrawal."
• Chest tube: confirm the side hole (the interruption in the radiopaque stripe) is inside the pleural space. A side hole in the chest wall is a malfunctioning tube that looks fine at a glance.
• Intra-aortic balloon pump: tip just distal to the left subclavian origin, roughly 2 cm below the top of the aortic knob.

That list sounds long. Dictated as a practiced block — "ET tube 4 cm above the carina, right IJ central line at the cavoatrial junction, enteric tube in the stomach" — it takes ten seconds and it is the most valuable ten seconds in the report.

The supine film hides the emergencies

On a supine patient, air rises anteriorly and fluid layers posteriorly, so the two findings the ICU most needs are the two the film is worst at:

• Pneumothorax collects anteromedially and at the base. Look for the deep sulcus sign — a lucent, abnormally deep costophrenic angle — and an unusually sharp cardiac or diaphragmatic border, not for the apical pleural line you learned on upright films.
• Pleural effusion shows as a hazy gradient over the hemithorax with preserved vessels, not a meniscus.
• Pneumoperitoneum is nearly invisible supine; if the question matters, recommend a cross-table lateral, an upright, or CT rather than reporting "no free air" on a film that cannot show it.

Comparison discipline

Compare to the most recent film and name its date in the report. "Compared to prior" is not a comparison; the ICU patient has thirty priors. Then, once a day or when something feels subtly different, pull a remote baseline — three or four days back. Daily comparison is how a slowly enlarging effusion or a creeping consolidation gets dictated as "unchanged" seven days in a row while the patient deteriorates. The day-to-day delta can be invisible while the week-to-week delta is obvious.

The "worse / better / unchanged" trap

The single global verdict is the laziest sentence in radiology and the one the clinician trusts most. Three rules keep it honest:

1. Give each finding its own direction. "Right pleural effusion increased; left basilar atelectasis improved; no new consolidation" is actionable. "Overall slightly worse" is not.
2. "Unchanged" is a positive claim. It asserts you compared that specific finding against a named prior and found no difference. If you did not, say what you see instead.
3. Do not inherit the prior report's language. If three reports in a row say "bibasilar opacities, unchanged," look at the actual images from day one. Report-to-report copying is how an ICU develops a fictional stable patient.

What not to over-call

Low lung volumes plus supine positioning produce basilar atelectasis on nearly every sedated patient; it does not need a differential every day. Say "bibasilar atelectasis" and move on — reserve "aspiration" and "pneumonia" for a new or asymmetric opacity with a clinical reason. And when a portable shows a discrete nodule, resist the urge to let it die in an ICU report nobody rereads: it needs a recommendation, and if the patient survives to outpatient follow-up, the interval comes from Fleischner criteria, not from memory.

A model report

EXAMINATION: Portable AP chest radiograph
HISTORY: 64-year-old male, intubated, septic shock.
Line placement and interval change.
TECHNIQUE: Single supine portable AP radiograph.
COMPARISON: Portable chest radiograph of 10/27, 06:12.
FINDINGS:
Support devices: Endotracheal tube tip 4.2 cm above the
carina. Right internal jugular central venous catheter
at the cavoatrial junction. Enteric tube tip and side
port below the GE junction, tip in the gastric body.
Left chest tube unchanged, side hole within the thorax.
Lungs: Left basilar atelectasis, improved. Right lower
lobe consolidation, slightly increased. No pneumothorax;
no deep sulcus sign.
Pleura: Small right pleural effusion, unchanged.
Cardiomediastinum: Stable, allowing for AP technique.
IMPRESSION:
1. All support devices in standard position.
2. Right lower lobe consolidation slightly increased;
   left basilar atelectasis improved.
3. Small right effusion, stable since 10/27.

Notice the architecture: devices first, each with a position; each finding with its own direction; the comparison dated. If you want a clean starting scaffold, our normal chest X-ray template is the non-ICU version of the same structure, and the rest of the template library follows the same logic. And if you would rather watch an ICU portable turn into exactly this report from a ten-second dictation, there's a live case in the demo — no signup, and it places every tube tip for you to verify rather than the other way around.