AP Neck Radiograph Positioning
Placeholder: proper alignment for airway soft-tissue imaging.
- AP soft tissue: View type (Placeholder caption)
- Neutral/extension: Neck position (Placeholder caption)
- Low kVp: Exposure (Placeholder caption)
- Subglottis: Key structure (Placeholder caption)
Positioning technique
Placeholder: short note on AP neck film setup.
Subglottic Steeple Sign Formation
Placeholder: tapering airway column mimics a church steeple.
- Steeple sign: Sign name (Placeholder caption)
- Subglottic trachea: Location (Placeholder caption)
- Mucosal edema: Cause (Placeholder caption)
- Tapered point: Shape (Placeholder caption)
Pathophysiology of narrowing
Placeholder: subglottic edema narrows the airway column.
Radiographic Confirmation of Croup
Placeholder: steeple sign supports clinical croup diagnosis.
- ~50%: Sensitivity (Placeholder caption)
- High: Specificity (Placeholder caption)
- 6mo–3yr: Typical age (Placeholder caption)
- Self-limited: Course (Placeholder caption)
Imaging role in croup
Placeholder: X-ray supports but does not replace clinical exam.
Thumb Sign in Epiglottitis
Placeholder: swollen epiglottis appears as a rounded thumb shape.
- Thumb sign: Sign name (Placeholder caption)
- Supraglottic: Location (Placeholder caption)
- Epiglottis edema: Cause (Placeholder caption)
- Emergency: Urgency (Placeholder caption)
Differentiating patterns
Placeholder: thumb sign contrasts sharply with steeple sign.
Clinical Judgment Over Imaging
Placeholder: never delay airway management to obtain imaging.
- Airway first: Priority (Placeholder caption)
- Adjunct only: Imaging role (Placeholder caption)
- No X-ray: Unstable patient (Placeholder caption)
- ENT/anesthesia: Team approach (Placeholder caption)
Safety principle
Placeholder: clinical stability guides imaging decisions.
Placeholder: unstable airway patients bypass radiography entirely.