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Sonographic elbow scanning is not yoga exercise
Advances in Rheumatology volume 59, Article number: 33 (2019)
We have read the manuscript by Abogamal and colleagues with interest . The article describes a comparison of the 90-degree flexion/neutral position of the elbow, sometimes called the “crab” (usually used for the posterior window evaluation) , with a standard position. Their results showed a highly significant difference in favor of the 90-degree flexion position. We congratulate the authors for their effort in drawing attention to improve ultrasound elbow scanning ergonomy. Importantly, it has already been reported that repetitive ultrasound examinations may result in musculoskeletal pain in ultrasound practitioners . However, according to our experience, the proposed 90-degree flexion position is not only uncomfortable for the examiner but also for the patient, already presenting with preexisting elbow pain. The position is coupled with internal rotation and extension of the shoulder, and as apparent from the Fig. 3c also shoulder abduction and an excessive wrist extension. Herewith, this position imposes abnormal pressure on the joints which may cause unnecessary loading of the musculoskeletal system of the patient. Furthermore, the proposed positioning is coupled with a need to change the position to assess the medial and lateral elbow compartments dynamically. In the medial compartment, the examiner may need to perform the dynamic valgus stress test to assess the integrity of the anterior bundle of the medial collateral ligament. On the lateral side, the examiner may need to perform dynamic scanning to evaluate annular ligament and rule out possible occult fractures of the radial head. On the contrary, Mezian and colleagues proposed and published a more ergonomic protocol for all elbow regions examination with the patient lying semisupine on the examination bed . In the future, we suggest a study to compare the semisupine approach to a “standard” protocol . We believe this is of utmost importance for a smooth workflow for musculoskeletal ultrasonographers to prevent chronic injuries and improve the quality of the examination.
Availability of data and materials
Abogamal A, Ghanem S, Saad H. A single simple position for ultrasound assessment of both common extensor and common flexor origin at the elbow. Adv Rheumatol. 2019;59(1):11.
Reijnierse M, Kelemouridou M, Miller TT. Video: musculoskeletal ultrasound imaging of the elbow: part 1, Normal anatomy. AJR Am J Roentgenol. 2013;200(6):W644.
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Mezian K, Machač S, Zavareh A, Majerníková L, Vacek J, Navrátil L, Schmitz M. Positioning techniques to improve the ultrasound evaluation of the elbow. Ultrasound Q. 2019;35(2):136–41.
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Mezian, K., Sobotová, K. & Angerová, Y. Sonographic elbow scanning is not yoga exercise. Adv Rheumatol 59, 33 (2019). https://doi.org/10.1186/s42358-019-0079-3
- Patient positioning
- Ultrasound scan
- Elbow ultrasonography