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Conference Paper: Use of ultrasound to monitor distractions by magnetically controlled growing rods: a longitudinal correlation study
Title | Use of ultrasound to monitor distractions by magnetically controlled growing rods: a longitudinal correlation study |
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Authors | |
Issue Date | 2015 |
Publisher | SICOT. |
Citation | The 36th SICOT Orthopaedic World Congress, Guangzhou, China, 17-19 September 2015. How to Cite? |
Abstract | INTRODUCTION: 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. |
Description | Session: Free Papers - Spine Deformities 2: abstract no.: 39908 |
Persistent Identifier | http://hdl.handle.net/10722/220345 |
DC Field | Value | Language |
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dc.contributor.author | Bow, CHY | - |
dc.contributor.author | Cheung, JPY | - |
dc.contributor.author | Samartzis, D | - |
dc.contributor.author | Kwan, K | - |
dc.contributor.author | Cheung, KMC | - |
dc.date.accessioned | 2015-10-16T06:38:58Z | - |
dc.date.available | 2015-10-16T06:38:58Z | - |
dc.date.issued | 2015 | - |
dc.identifier.citation | The 36th SICOT Orthopaedic World Congress, Guangzhou, China, 17-19 September 2015. | - |
dc.identifier.uri | http://hdl.handle.net/10722/220345 | - |
dc.description | Session: Free Papers - Spine Deformities 2: abstract no.: 39908 | - |
dc.description.abstract | INTRODUCTION: 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.language | eng | - |
dc.publisher | SICOT. | - |
dc.relation.ispartof | SICOT 2015 Orthopaedic World Congress | - |
dc.relation.ispartof | 第三十六届世界骨科大会 | - |
dc.title | Use of ultrasound to monitor distractions by magnetically controlled growing rods: a longitudinal correlation study | - |
dc.type | Conference_Paper | - |
dc.identifier.email | Bow, HYC: cbow@hku.hk | - |
dc.identifier.email | Cheung, JPY: cheungjp@hku.hk | - |
dc.identifier.email | Samartzis, D: dsamartzis@msn.com | - |
dc.identifier.email | Kwan, K: kyhkwan@hku.hk | - |
dc.identifier.email | Cheung, KMC: cheungmc@hku.hk | - |
dc.identifier.authority | Cheung, JPY=rp01685 | - |
dc.identifier.authority | Samartzis, D=rp01430 | - |
dc.identifier.authority | Kwan, K=rp02014 | - |
dc.identifier.authority | Cheung, KMC=rp00387 | - |
dc.identifier.hkuros | 255856 | - |
dc.publisher.place | China | - |