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Conference Paper: Use of ultrasound to monitor distractions by magnetically controlled growing rods: a longitudinal correlation study

TitleUse of ultrasound to monitor distractions by magnetically controlled growing rods: a longitudinal correlation study
Authors
Issue Date2015
PublisherSICOT.
Citation
The 36th SICOT Orthopaedic World Congress, Guangzhou, China, 17-19 September 2015. How to Cite?
AbstractINTRODUCTION: Growing rods are commonly used for surgical treatment of skeletally immature patients with scoliosis. Magnetically-controlled growing rods (MCGR) allows for more frequent distractions to mimic normal growth. However, such frequent distractions equate to more frequent radiographs for monitoring distraction; thereby, increasing ionizing radiation exposure to the developing child. The use of ultrasound, which emits no radiation, has been found in cross-sectional studies to be reliable in measuring MCGR distractions. As such, the following study aimed to address the longitudinal clinical utility of ultrasound compared to x-ray use for MCGR distractions. METHODS: This is a prospective case series with minimum two-year follow-up of patients treated with MCGR. Out-patient distractions were performed at monthly intervals, targeting 2mm of distraction on each occasion. Assessment of distraction length was monitored by ultrasound at each visit, X-rays were taken every six months and compared with ultrasound measurements. RESULTS: 8 patients (6 females, 2 males) with mean 23 distractions (SD: ±11.9) were recruited. The mean follow-up was 45.7 months (SD: ±12.8). A total of 22 sets of x-rays were taken. The mean distracted length was 5.3 mm(SD: ±3.7mm) on x-rays and 4.7mm (SD:±3.7mm) on ultrasound, with excellent correlation noted between the two imaging modalities (r=0.930; p<0.0001). CONCLUSIONS: This is the first longitudinal study to note that ultrasound assessment of MCGR distraction lengths was highly comparable to that of x-rays. Ultrasound can be a reliable alternative to plain radiographs; thereby, avoiding radiation exposure and its detrimental sequelae in the developing child.
DescriptionSession: Free Papers - Spine Deformities 2: abstract no.: 39908
Persistent Identifierhttp://hdl.handle.net/10722/220345

 

DC FieldValueLanguage
dc.contributor.authorBow, CHY-
dc.contributor.authorCheung, JPY-
dc.contributor.authorSamartzis, D-
dc.contributor.authorKwan, K-
dc.contributor.authorCheung, KMC-
dc.date.accessioned2015-10-16T06:38:58Z-
dc.date.available2015-10-16T06:38:58Z-
dc.date.issued2015-
dc.identifier.citationThe 36th SICOT Orthopaedic World Congress, Guangzhou, China, 17-19 September 2015.-
dc.identifier.urihttp://hdl.handle.net/10722/220345-
dc.descriptionSession: Free Papers - Spine Deformities 2: abstract no.: 39908-
dc.description.abstractINTRODUCTION: Growing rods are commonly used for surgical treatment of skeletally immature patients with scoliosis. Magnetically-controlled growing rods (MCGR) allows for more frequent distractions to mimic normal growth. However, such frequent distractions equate to more frequent radiographs for monitoring distraction; thereby, increasing ionizing radiation exposure to the developing child. The use of ultrasound, which emits no radiation, has been found in cross-sectional studies to be reliable in measuring MCGR distractions. As such, the following study aimed to address the longitudinal clinical utility of ultrasound compared to x-ray use for MCGR distractions. METHODS: This is a prospective case series with minimum two-year follow-up of patients treated with MCGR. Out-patient distractions were performed at monthly intervals, targeting 2mm of distraction on each occasion. Assessment of distraction length was monitored by ultrasound at each visit, X-rays were taken every six months and compared with ultrasound measurements. RESULTS: 8 patients (6 females, 2 males) with mean 23 distractions (SD: ±11.9) were recruited. The mean follow-up was 45.7 months (SD: ±12.8). A total of 22 sets of x-rays were taken. The mean distracted length was 5.3 mm(SD: ±3.7mm) on x-rays and 4.7mm (SD:±3.7mm) on ultrasound, with excellent correlation noted between the two imaging modalities (r=0.930; p<0.0001). CONCLUSIONS: This is the first longitudinal study to note that ultrasound assessment of MCGR distraction lengths was highly comparable to that of x-rays. Ultrasound can be a reliable alternative to plain radiographs; thereby, avoiding radiation exposure and its detrimental sequelae in the developing child.-
dc.languageeng-
dc.publisherSICOT.-
dc.relation.ispartofSICOT Orthopaedic World Congress-
dc.titleUse of ultrasound to monitor distractions by magnetically controlled growing rods: a longitudinal correlation study-
dc.typeConference_Paper-
dc.identifier.emailBow, HYC: cbow@hku.hk-
dc.identifier.emailCheung, JPY: cheungjp@hku.hk-
dc.identifier.emailSamartzis, D: dsamartzis@msn.com-
dc.identifier.emailKwan, K: kyhkwan@hku.hk-
dc.identifier.emailCheung, KMC: cheungmc@hku.hk-
dc.identifier.authorityCheung, JPY=rp01685-
dc.identifier.authoritySamartzis, D=rp01430-
dc.identifier.authorityKwan, K=rp02014-
dc.identifier.authorityCheung, KMC=rp00387-
dc.identifier.hkuros255856-
dc.publisher.placeChina-

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