Feasibility of Rib Kinematics and Intercostal-Space Biomechanical Characterization by Ultrasound in Adolescent Idiopathic Scoliosis

Hisaund, Alisa; Pietton, Raphaël; Vialle, Raphaël; Skalli, Wafa; Vergari, Claudio

doi:10.1016/j.ultrasmedbio.2021.03.017

Cited by 2 publications

(2 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We speculated that an increased thoracic perimeter and inspiratory muscle activation during inhalation played a role. The finding is consistent with the previous studies that reported an increase in intercostal width [ 27 ], stiffness [ 27 – 29 ], muscle cross-sectional area [ 30 ], and muscle thickness [ 31 ] during inspiration. On the other hand, the impact of respiration on the intercostal SCD values exhibited a non-linear pattern, the ANOVA suggesting a site-dependent interaction.…”

Section: Discussionsupporting

confidence: 93%

“…Intercostal elastography also remains an unexplored territory in the literature. Only two recent studies [ 27 , 28 ] demonstrated the feasibility of biomechanical characterization of the ICS by SWE. The reported biomechanical values (an approximation of 10 to 20 kPa) were of the same order of magnitude as our data, which supports the validity of our intercostal SWE results.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Determining the ideal measurement site and respiratory condition for liver transient elastography: toward clinical practice standardization

Huang,

Lam,

Cheng

et al. 2024

Insights Imaging

View full text Add to dashboard Cite

Objectives Liver transient elastography (TE) has been endorsed by the WHO as the first-line diagnostic tool for liver diseases. Although unreliable and invalid results caused by intercostal space (ICS)-associated factors (including excessive subcutaneous fat and a narrow ICS relative to the transducer size) and operator inexperience are not uncommon, no standard guidelines for ideal probe placement are currently available. Herein, we conducted a prospective observational study to identify an ideal measurement site and respiratory condition for TE by characterizing anatomical and biomechanical properties of the ICSs using ultrasound B-mode and elasticity imaging. Methods Intercostal ultrasound was performed pointwise at four specific sites in 59 patients to simultaneously measure the width, stiffness, and skin‒liver capsule distance (SCD) of the ICSs over the liver, under end-inspiratory and end-expiratory conditions. Intersections between the 8th ICS and anterior axillary line, the 7th ICS and anterior axillary line, the 8th ICS and mid-axillary line, and the 7th ICS and mid-axillary line were defined as Sites 1 to 4, respectively. Results Results indicated that Sites 2 and 3 presented greater intercostal width; Sites 3 and 4 displayed lower intercostal stiffness; Sites 2 and 3 exhibited a shorter SCD. The ICSs were significantly wider and stiffer at end-inspiration. Additionally, the liver was more easily visualized at Sites 1 and 3. Conclusion We recommend Site 3 for TE probe placement owing to its greater width, lower stiffness, and smaller abdominal wall thickness. Performing TE at end-inspiration is preferred to minimize transducer-rib interferences. This study paves the way toward a standardized TE examination procedure. Critical relevance statement A standardized measurement protocol for WHO-recommended liver TE was first established to improve the success and efficiency of the examination procedure. Key Points WHO-recommended TE is unreliable or fails due to intercostal space-related factors. The 8th intercostal space on the mid-axillary line and end-inspiration are recommended. This standardized protocol aids in handling challenging cases and simplifies operational procedures. Graphical Abstract

show abstract