Congenital Muscular Torticollis
Conditions
Keywords
Ultrasonography, echotexture, K value, SCM muscles, CMT infants
Brief summary
Objective: To document the sternocleidomastoid (SCM) muscle fibrosis in congenital muscular torticollis (CMT) infants with quantified echotexture and measured thickness during the treatment course. Design: Cohort study. Setting: Rehabilitation department in a tertiary care hospital. Participants: Infants with clinical diagnosis of CMT, without any neurological presentation, cervical spin abnormality, and developmental dysplastic hip problem, were recruited in the study. Intervention: All subjects had physiotherapy for at least 3 months. They underwent at least two times of clinical assessment and ultrasonographic examination (1) for bilateral SCM muscles during the follow-up period. End of follow-up: Subjects who still had prominent clinical presentations after physiotherapy for 6 months or were older than 1 year would receive surgery. Subsided presenting clinical features determined by the clinician was the other end-point of this investigation. Main Outcome Measures: The K value, derived from the difference of echo intensities (2) between the involved and uninvolved SCM muscles on longitudinal sonograms, was used to represent the severity of muscle fibrosis in CMT infants. Bilateral SCM muscle thickness and involved-to-uninvolved thickness ratio (Ratio I/U) were also obtained from longitudinal sonograms. Clinical outcome was also recorded.
Detailed description
1. An experienced sonographer performed ultrasonographic examination with the subject in the supine position and heads rotated contralaterally to the examination side. A 5-12 MHz linear-array ultrasound transducer was used to observe both longitudinal and transverse views of bilateral SCM muscles for each subject. The ultrasound system settings, including gain (86%), monitor dynamic range (70 dB), and depth (2 cm), were kept constant throughout the study. 2. The echo intensity was determined by computer-assisted gray scale analysis and was calculated in MATLAB 2006b. The mean echo intensity of every pixel in the region of interest and the K value developed to compare sonograms between different individuals or between different times in the same subject were estimated as the previous study (PMID: 22215768)
Interventions
Sponsors
Chang Gung Memorial Hospital
Study design
Observational model
COHORT
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
1 Months to 12 Months
Healthy volunteers
No
Inclusion criteria
* infants with congenital muscular torticollis Presenting clinical features of the CMT infants, including head tilt in the upright position, facial asymmetry, limited passive range of motion in neck rotation, palpable neck mass
Exclusion criteria
* Subjects with neurological symptoms or signs * Cervical spine abnormalities * Developmental dysplastic hip problems
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| K value | 3 years | Difference of echo intensities on muscle sonograms between involved and uninvolved sternocleidomastoid muscles in 50 infants with congenital muscular torticollis |
| Muscle thickness in cm | 3 years | Bilateral sternocleidomastoid muscle thickness in 50 infants with congenital muscular torticollis |
| Ratio I/U (involved-to-uninvolved muscle thickness ratio) | 3 years | — |
| Age in month | 3 years | The age of first evaluation |
| Times of ultrasonographic examinations | 3 years | The times of ultrasonographic examination before end follow-up |
| Body weight in kg | 3 years | Body weight of all subjects during the follow-up period |
| Body length in cm | 3 years | Body length of all subjects during the follow-up period |
Outcome results
None listed