Clinical utility of ultrasound to prospectively monitor distraction of magnetically controlled growing rods.

BACKGROUND CONTEXT: Growing rods are commonly used for surgical treatment of skeletally immature patients with scoliosis, but require repeated surgeries for distractions and are fraught with complications. As an alternative, the use of magnetically controlled growing rods (MCGR) allows for more frequent non-invasive distractions to mimic normal growth. However, more plain radiographs are needed to monitor increased distraction frequency, thereby increasing ionizing radiation exposure to the developing child. The use of ultrasound, which emits no radiation, has been found in a cross-sectional study to be reliable in measuring MCGR distractions. PURPOSE: The study aims to address the prospective clinical utility of ultrasound compared with plain radiographs for assessing MCGR distractions. STUDY DESIGN: This is a prospective study. PATIENT SAMPLE: The study includes patients with early-onset scoliosis undergoing distractions after MCGR implant. OUTCOME MEASURES: The distraction length on plain radiographs and ultrasound was measured. METHODS: This is a prospective study of patients treated with MCGR. Patients with both single- and dual-rod systems were included. Outpatient distractions were performed at monthly intervals, targeting 2 mm of distraction on each occasion. Assessment of distraction length was monitored by ultrasound at each visit; plain radiographs were taken every 6 months and were compared with ultrasound measurements. RESULTS: Nine patients (5 female, 4 male), with a mean of 29 distractions (standard deviation [SD] ±14.3), were recruited. The mean distracted length per 6 months was 5.7 mm (SD ±3.6 mm) on plain radiographs and 5.2 mm (SD ±3.9 mm) on ultrasound for the concave rod, and 6.1 mm (SD ±3.6 mm) on plain radiographs and 5.9 mm (SD ±3.8 mm) on ultrasound for the convex rod. Excellent inter- and intra-rater reliabilities were observed for radiographic and ultrasound measurements. An excellent correlation was noted between the two imaging modalities (r=0.93; p<.0001). CONCLUSIONS: This is the first prospective study to validate that ultrasound assessment of MCGR distraction lengths was highly comparable with that of plain radiographs. The present study has verified that ultrasound can be used to document length changes by distraction over time and that it had high clinical utility. Ultrasound can be a reliable alternative to plain radiographs, thereby avoiding radiation exposure and its potential detrimental sequelae in the developing child.

Fundamentals of Clinical Outcomes Assessment for Spinal Disorders: Clinical Outcome Instruments and Applications.

Study Design A broad narrative review. Objectives Outcome assessment in spinal disorders is imperative to help monitor the safety and efficacy of the treatment in an effort to change the clinical practice and improve patient outcomes. The following article, part two of a two-part series, discusses the various outcome tools and instruments utilized to address spinal disorders and their management. Methods A thorough review of the peer-reviewed literature was performed, irrespective of language, addressing outcome research, instruments and tools, and applications. Results Numerous articles addressing the development and implementation of health-related quality-of-life, neck and low back pain, overall pain, spinal deformity, and other condition-specific outcome instruments have been reported. Their applications in the context of the clinical trial studies, the economic analyses, and overall evidence-based orthopedics have been noted. Additional issues regarding the problems and potential sources of bias utilizing outcomes scales and the concept of minimally clinically important difference were discussed. Conclusion Continuing research needs to assess the outcome instruments and tools used in the clinical outcome assessment for spinal disorders. Understanding the fundamental principles in spinal outcome assessment may also advance the field of "personalized spine care."

Fundamentals of clinical outcomes assessment for spinal disorders: study designs, methodologies, and analyses.

Study Design A broad narrative review. Objective Management of spinal disorders is continuously evolving, with new technologies being constantly developed. Regardless, assessment of patient outcomes is key in understanding the safety and efficacy of various therapeutic interventions. As such, evidence-based spine care is an essential component to the armamentarium of the spine specialist in an effort to critically analyze the reported literature and execute studies in an effort to improve patient care and change clinical practice. The following article, part one of a two-part series, is meant to bring attention to the pros and cons of various study designs, their methodological issues, as well as statistical considerations. Methods An extensive review of the peer-reviewed literature was performed, irrespective of language of publication, addressing study designs and their methodologies as well as statistical concepts. Results Numerous articles and concepts addressing study designs and their methodological considerations as well as statistical analytical concepts have been reported. Their applications in the context of spine-related conditions and disorders were noted. Conclusion Understanding the fundamental principles of study designs and their methodological considerations as well as statistical analyses can further advance and improve future spine-related research.

Inter-observer and intra-observer reliability of the Harris hip scoring system

OBJECTIVE: The Harris hip score (HHS) is a 100-point scale for rating pain, function, absence of deformity, and range of motion. The purpose of this study is to assess the inter-observer and intra-observer reliability of the Harris hip score among senior orthopedic residents at the Philippine General Hospital. METHODS: Twenty-four hips from 20 patients were evaluated using the Harris hip score by four senior residents from the Department of Orthopedics, Philippine General Hospital. All patients were interviewed twice in the clinic and the reliability of the HHS was evaluated. RESULTS: The inter-observer coefficient of concordance (Kendall coefficient of concordance W) was 0.9 for both groups of observers. The intra-observer coefficients of concordance were 0.8, 1.0, 0.9, and 0.9, for the four observers. A 0 value indicates no concordance among a set of raters while a score of 1 indicates perfect concordance. Obtaining a score greater than 0.75 represents excellent level of agreement. CONCLUSION: We conclude that the Harris hip score has high interobserver and inter-observer reliability among senior Orthopedic residents at the Philippine General Hospital.