The objective of this study is to analyse the positioning of the scapula in standing position and compared to the supine position (CT scan) in 3 dimensions (3 rotations of the scapula) using a non-radiant, portable system, combining an ultrasound probe with marker and a camera integrated into a Tablet for the three-dimensional location of the marker (probe).
This is a mono-center trial. Patients in the process of pre-operative care of a reverse shoulder arthroplasty (CT Scan already available as part of the care course in supine position) will be offered the study. A localizer ultrasound will be performed during surgical consultation or the day before the surgery in standing position (duration: 1/2 day). This consultation takes place during the course of the surgical consultation or when the patient is admitted the day before his surgical procedure.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
DIAGNOSTIC
Masking
NONE
Enrollment
30
The localizer ultrasound of the shoulder is performed in an unclothed patient (at the shoulders) and comes to locate bony landmarks using the ultrasound probe as a Transcutaneous localizer.
Brest, University Hospital
Brest, France
RECRUITINGStudy the location of the scapula in 3 dimensions for the patient in standing position
descriptive statistics of the population : mean and standard deviation of the 3 rotations of the scapula in each plane of reference coronal plane expressed in degree. Comparison with the supine position and analysis of any differences.
Time frame: Day 1
Study the location of the scapula in 3 dimensions for the patient in standing position
descriptive statistics of the population : mean and standard deviation of the 3 rotations of the scapula in each plane of reference axial plane expressed in degree. Comparison with the supine position and analysis of any differences.
Time frame: Day1
Study the location of the scapula in 3 dimensions for the patient in standing position
descriptive statistics of the population : mean and standard deviation of the 3 rotations of the scapula in each plane of reference sagittal plane expressed in degree. Comparison with the supine position and analysis of any differences.
Time frame: Day 1
Evaluating the accuracy of the device using a validation bench
Validation of the device using a biomechanical bench. The rotation will be assessed in coronal plane in degree. The differences between the measurements of the biomechanical bench will be compared to the measurements validation bench to assess the mean error and standard deviation of the ultrasound device
Time frame: Day 1
Evaluating the accuracy of the device using a validation bench
Validation of the device using a biomechanical bench. The rotation will be assessed in axial plane in degree. The differences between the measurements of the biomechanical bench will be compared to the measurements validation bench to assess the mean error and standard deviation of the ultrasound device
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Time frame: Day 1
Evaluating the accuracy of the device using a validation bench
Validation of the device using a biomechanical bench. The rotation will be assessed in sagittal plane in degree. The differences between the measurements of the biomechanical bench will be compared to the measurements validation bench to assess the mean error and standard deviation of the ultrasound device
Time frame: Day 1