New applications of sonoelastography in rheumatology: where are we now?

BMC Musculoskelet Disord

et al. 2020

Background Gout has been associated with weaker foot/leg muscles and altered gait patterns. There is also evidence of on-going foot pain and an increased risk of tendinopathy, with the Achilles and patella tendons most frequently affected in gout. Additionally, the inflammation associated with gout may change tissue elasticity. Ultrasound imaging utilising shear wave elastography (SWE) offers a non-invasive method of quantifying changes in tendon stiffness. SWE findings have not previously been reported in individuals with gout. We sought to determine differences in Achilles tendon stiffness in people with gout compared to controls (non-gout). Methods A cross sectional study comparing 24 people with gout and 26 age/sex-matched controls. Clinical and demographic data were collated, and US imaging used to determine tendon thickness, presence of gouty tophi and/or aggregates and levels of angiogenesis. Ten shear wave elastography (SWE) measures were taken along the centre of a longitudinal section of the mid-portion of each Achilles tendon. Prior to data collection, intra-observer error was good (>0.69). Data were summarised using descriptive statistics and a repeated measures ANCOVA was used to compare SWE measures between the two groups for the left and right foot separately after accounting for Body Mass Index (BMI). Results A small proportion of those with gout presented with intra-tendon aggregates and/or intra-tendon tophi in one or both tendons. There was no statistically significant difference in tendon thickness between groups. Neo-vascularity was present in a third of gout participants. SWE findings demonstrated significantly reduced tendon stiffness in those with gout compared to controls: right Achilles mdiff =1.04 m/s (95% CI (0.38 to 1.7) p = 0.003 and left Achilles mdiff = 0.7 m/s (95% CI 0.09 to 1.32) p = 0.025. No relationship between the presence of tophi and SWE values were detected. Conclusion Subjects with chronic gout show significantly reduced Achilles tendon stiffness compared to non-gout controls. From a clinical standpoint, our findings were similar to SWE measurements in subjects with Achilles tendinopathy and who did not have gout.

Section: Introductionmentioning

confidence: 99%

Differences in Achilles tendon stiffness in people with gout: a pilot study

BMC Musculoskelet Disord

et al. 2020

“…[13] SWE is a non-invasive and dynamic method of quantifying changes in tendon elasticity, where vibration is tissue is applied via a focussed ultrasound pulse. [14][15][16] SWE offers a quantitative measure of the velocity of a transverse wave propagating through soft tissue, which has been demonstrated to be directly proportional to tissue stiffness. [17] Importantly in ultrasonography, previous work indicates SWE is more independent of user skill.…”

Section: Introductionmentioning

confidence: 99%

“…In Sjogrens syndrome (SS) SWE has promising utility for the evaluation of salivary glands. [16] A review of imaging modalities in gout, highlighted the value of ultrasound for urate deposition and inflammation damage, but sonoelastography was not reported. [21] We aimed to utilise SWE to determine differences in Achilles tendon stiffness in people with chronic gout compared to controls (non-gout).…”

Section: Introductionmentioning

confidence: 99%

Differences in Achilles tendon stiffness in people with gout.

et al. 2020

Preprint

Background Chronic gout is associated with weaker foot/leg muscles, altered gait patterns and on-going foot pain. Inflammation associated with gout may change tissue elasticity and ultrasound imaging (US) utilising shear wave elastography (SWE) offers a non-invasive method of quantifying these changes in tendon stiffness and SWE findings have not previously been reported in individuals with gout. We sought to determine differences in Achilles tendon stiffness in people with chronic gout compared to controls (non-gout). Methods A cross sectional study comparing 24 people with gout and 26 age/sex-matched controls. Clinical and demographic data were collated and US imaging used to determine tendon thickness, presence of gouty tophi and/or aggregates and levels of angiogenesis. Ten shear wave elastography (SWE) measures were taken along a longitudinal section of the mid-point of the Achilles tendon bilaterally. Prior to data collection, intra-observer error was good (0.75). Data were summarised using descriptive statistics and a repeated measures ANCOVA was used to compare SWE measures between the two groups for the left and right foot separately after accounting for Body Mass Index (BMI). Results: A small proportion of those with gout presented with intra-tendon aggregates and/or intra-tendon tophi in one or both tendons. There was no statistically significant difference in tendon thickness between groups. Neo-vascularity was present in a third of gout participants. SWE findings demonstrated significantly reduced tendon stiffness in those with gout compared to controls: right Achilles mdiff =1.04 (95% CI (0.38 to 1.7) p=0.003 and left Achilles mdiff = 0.7 (95% CI 0.09 to 1.32) p=0.025. Conclusion: Subjects with chronic gout show significantly reduced Achilles tendon stiffness compared to non-gout controls. From a clinical standpoint, our findings were similar to SWE measurements in subjects with Achilles tendinopathy and who did not have gout.

“…[18] Shear wave elastography (SWE) is a non-invasive and dynamic method of quantifying changes in tendon elasticity, involving application of a focused ultrasound pulse to the tissue being imaged. [19][20][21] SWE is a type of US elastography that uses shear waves generated by a remote radiation force of focused ultrasonic beams to assess tissue elasticity. It measures the velocity of shear waves (in metres per second) moving through tissue, and displays these in a quantitative manner via a real-time elastogram, in which elasticity is portrayed as a colour-coded representation over a B-mode image.…”

Section: Introductionmentioning

confidence: 99%

Differences in Achilles tendon stiffness in people with gout: a pilot study

et al. 2020

Preprint

Background: Gout has been associated with weaker foot/leg muscles and altered gait patterns. There is also evidence of on-going foot pain and an increased risk of tendinopathy, with the Achilles and patella tendons most frequently affected in gout. Additionally, the inflammation associated with gout may change tissue elasticity. Ultrasound imaging utilising shear wave elastography (SWE) offers a non-invasive method of quantifying changes in tendon stiffness. SWE findings have not previously been reported in individuals with gout. We sought to determine differences in Achilles tendon stiffness in people with gout compared to controls (non-gout).Methods: A cross sectional study comparing 24 people with gout and 26 age/sex-matched controls. Clinical and demographic data were collated, and US imaging used to determine tendon thickness, presence of gouty tophi and/or aggregates and levels of angiogenesis. Ten shear wave elastography (SWE) measures were taken along the centre of a longitudinal section of the mid-portion of each Achilles tendon. Prior to data collection, intra-observer error was good (0.75). Data were summarised using descriptive statistics and a repeated measures ANCOVA was used to compare SWE measures between the two groups for the left and right foot separately after accounting for Body Mass Index (BMI).Results: A small proportion of those with gout presented with intra-tendon aggregates and/or intra-tendon tophi in one or both tendons. There was no statistically significant difference in tendon thickness between groups. Neo-vascularity was present in a third of gout participants. SWE findings demonstrated significantly reduced tendon stiffness in those with gout compared to controls: right Achilles mdiff =1.04m/s (95% CI (0.38 to 1.7) p=0.003 and left Achilles mdiff = 0.7m/s (95% CI 0.09 to 1.32) p=0.025. No relationship between the presence of tophi and SWE values were detected. Conclusion: Subjects with chronic gout show significantly reduced Achilles tendon stiffness compared to non-gout controls. From a clinical standpoint, our findings were similar to SWE measurements in subjects with Achilles tendinopathy and who did not have gout.