June-Sik Cho MD, Abstract Co-Author: Nothing to Disclose

Jeong Eun Lee, Abstract Co-Author: Nothing to Disclose

Kyung-Sook Shin MD, Abstract Co-Author: Nothing to Disclose

Borahm Lee, Presenter: Nothing to Disclose

Won Hong Park MD, Abstract Co-Author: Nothing to Disclose

To establish the reference value for normal right hemidiaphragmatic motion measured by M-mode ultrasonography in a large healthy population.

From May 2013 to January 2014, a total of 288 adult subjects(140 men and 148 women) who had regular checkup liver ultrasound scans underwent M-mode ultrasonography for evaluation of right hemidiaphragmatic motion. Examinations were performed three times: during quiet breathing, deep breathing, and voluntary sniffing. Diaphragmatic excursion was determined as median value of the three measurements during each examination. Relationships between diaphragmatic motion and different variables [sex, age groups(≤30, 31–60, ≥61), and BMI groups(<18.5, 18.5–23, >23)] were assessed.

Right hemidiaphragmatic motion was successfully evaluated in all 288 subjects during quiet breathing, deep breathing, and voluntary sniffing. The median values of diaphragmatic excursions of quiet breathing, deep breathing, and voluntary sniffing were 1.9 cm(range, 0.9–4.2; mean ±SD, 2.0±0.5), 4.9 cm(range, 1.8–8.6; mean ±SD, 4.9 ± 1.2), and 2.6 cm(range, 1.2–5.5; mean ±SD, 2.7±0.8). There was no significant difference in diaphragmatic motion between sex and age groups, respectively, during quiet breathing, deep breathing, and voluntary sniffing(p> .05 in all examinations). In BMI groups, there was no significant difference in diaphragmatic motion during quiet breathing and voluntary sniffing(p=0.626 and 0.137, respectively); however, there was significant difference during deep breathing(P< .05).

The results of this study suggest a reference value of normal right hemidiaphragmatic motion.

The reference value of normal right hemidiaphragmatic motion can be used in study of diaphragmatic movement disorders such as diaphragmatic paralysis.

Cho, J, Lee, J, Shin, K, Lee, B, Park, W, Normal Right Hemidiaphragmatic Motion Measured with M-Mode Ultrasonography in a Large Healthy Population.  Radiological Society of North America 2014 Scientific Assembly and Annual Meeting, - ,Chicago IL. http://archive.rsna.org/2014/14007069.html