Sinusoid sign

The sinusoid sign in lung ultrasound refers to the dynamic, undulating appearance of the pleural line, often seen during inspiration and expiration in healthy lungs. This subtle, wave-like motion reflects the normal sliding of the visceral and parietal pleura, indicating the absence of pneumothorax or significant pleural adhesions. Recognizing the sinusoid sign is a key diagnostic feature for ruling out conditions that impede lung sliding.

This ultrasound finding is critical for medical professionals evaluating lung pathology, particularly in emergency and critical care settings. It helps differentiate normal lung mechanics from abnormalities, making it an essential component of pulmonary ultrasound assessment and aiding in accurate and timely diagnoses.

Other Definitions
Want to learn more?

POCUS Essentials Course

Learn More
Related Definitions
Other Definitions
Cardiac

Contribute to the POCUSpedia

Help us improve the accuracy and completeness of the POCUSpedia. Your contributions help maintain the highest standards of factual content.
Contributors who provide verified corrections or additions will be credited with a link to their chosen web address. We appreciate your expertise and time in helping us maintain accurate information about POCUS

As a [Specialty] clinician, POCUS has completely changed how I practice. GUSI’s training gave me the confidence to make faster, more accurate decisions for my patients.

JONATHAN DOE
Private Practice Owner

Suggest a Correction

* Required fields

“”