The purpose of this study is to examine the rotator cuff muscles in your shoulder at one and two year post total shoulder replacement surgery.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
TREATMENT
Masking
NONE
Enrollment
30
studies of both operative and nonoperative shoulders
Penn State Hershey Medical Center
Hershey, Pennsylvania, United States
RECRUITINGActive Nerve Denervation
EMG examination will be performed by a single neurologist. The EMG Examination will be performed on the muscles (upper subscapularis, supraspinatus, infraspinatus, teres minor and rhomboid) to look for any presence or absence of active denervation. Presence indicated by increased insertional activity, fibrillation potential, positive sharp waves and/or with fasciculations in both operated and unoperated shoulders.
Time frame: one year post surgery
Active Nerve Denervation
EMG examination will be performed by a single neurologist. The EMG Examination will be performed on the muscles (upper subscapularis, supraspinatus, infraspinatus, teres minor and rhomboid) to look for any presence or absence of active denervation. Presence indicated by increased insertional activity, fibrillation potential, positive sharp waves and/or with fasciculations in both operated and unoperated shoulders.
Time frame: two year post surgery
Neuropathic Changes_amplitude
The EMG Examination will be performed on the muscles (upper subscapularis, supraspinatus, infraspinatus, teres minor and rhomboid) to look for the presence or absence of neuropathic changes assessed by examining unit morphology amplitude: measured in millivolts, in both operated and unoperated shoulders.
Time frame: one year post surgery
Neuropathic Changes_amplitude
The EMG Examination will be performed on the muscles (upper subscapularis, supraspinatus, infraspinatus, teres minor and rhomboid) to look for the presence or absence of neuropathic changes assessed by examining unit morphology amplitude: measured in millivolts, in both operated and unoperated shoulders.
Time frame: two year post surgery
Neuropathic Changes_recruitment pattern
The EMG Examination will be performed on the muscles (upper subscapularis, supraspinatus, infraspinatus, teres minor and rhomboid) to look for the presence or absence of neuropathic changes assessed by examining unit morphology: phases with recruitment pattern measured as 1-2 or 3-4 units in both operated and unoperated shoulders.
This platform is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional.
Time frame: one year post surgery
Neuropathic Changes_recruitment pattern
The EMG Examination will be performed on the muscles (upper subscapularis, supraspinatus, infraspinatus, teres minor and rhomboid) to look for the presence or absence of neuropathic changes assessed by examining unit morphology: phases with recruitment pattern measured as 1-2 or 3-4 units in both operated and unoperated shoulders.
Time frame: two year post surgery
Neuropathic Changes_duration
The EMG Examination will be performed on the muscles in both operated and unoperated shoulders to look for the presence or absence of neuropathic changes assessed by examining unit morphology: duration measured in milliseconds.
Time frame: one year post surgery
Neuropathic Changes_duration
The EMG Examination will be performed on the muscles in both operated and unoperated shoulders to look for the presence or absence of neuropathic changes assessed by examining unit morphology: duration measured in milliseconds.
Time frame: two year post surgery
Total number of Muscles affected with active denervation
The EMG Examination will be performed to look for abnormal changes as indicated by presence of active nerve denervation across the 5 muscles (upper subscapularis, Infraspinatus, Supraspinatus, teres minor, Rhomboid) in both operated and unoperated shoulders.
Time frame: one year post surgery
Total number of Muscles affected with active denervation
The EMG Examination will be performed to look for abnormal changes as indicated by presence of active nerve denervation across the 5 muscles (upper subscapularis, Infraspinatus, Supraspinatus, teres minor, Rhomboid) in both operated and unoperated shoulders.
Time frame: two year post surgery
Total number of muscles affected with neuropathic changes
The EMG Examination will be performed to look for neuropathic changes as indicated by amplitude, recruitment pattern and duration across the 5 muscles (upper subscapularis, Infraspinatus, Supraspinatus, teres minor, Rhomboid) in both operated and unoperated shoulders.
Time frame: one year post surgery
Total number of muscles affected with neuropathic changes
The EMG Examination will be performed to look for neuropathic changes as indicated by amplitude, recruitment pattern and duration across the 5 muscles (upper subscapularis, Infraspinatus, Supraspinatus, teres minor, Rhomboid) in both operated and unoperated shoulders.
Time frame: two year post surgery
Tear in Rotator Cuff Muscles in both shoulders
CT Scan to evaluate rotator cuff muscles for presence or absence of any tear in operative and non-operative. If tear is present - partial or full. If full, small or (\<1cm), or medium (1-3 cm\_ or Large (3-5 cm) or massive (\>5cm), tendon involved (supraspinatus or infraspinatus or subscapularis).
Time frame: one year post surgery
Tear in Rotator Cuff Muscles in both shoulders
CT Scan to evaluate rotator cuff muscles for presence or absence of any tear in operative and non-operative. If tear is present - partial or full. If full, small or (\<1cm), or medium (1-3 cm\_ or Large (3-5 cm) or massive (\>5cm), tendon involved (supraspinatus or infraspinatus or subscapularis).
Time frame: two year post surgery
Fatty degeneration in Rotator Cuff Muscles in both shoulders using Goutallier Classification
CT scan to evaluate atrophy in Rotator Cuff Muscles using the Goutallier Classification System. The Classification system measures fatty tissue infiltration and has five stages, ranging from Stage 0 (normal muscle) to Stage 4 (more fat than muscle) in upper subscapularis, infraspinatus, supraspinatus, teres minor and rhomboid in both operated and unoperated shoulder.
Time frame: one year post surgery
Fatty degeneration in Rotator Cuff Muscles in both shoulders using Goutallier Classification
CT scan to evaluate atrophy in Rotator Cuff Muscles using the Goutallier Classification System. The Classification system measures fatty tissue infiltration and has five stages, ranging from Stage 0 (normal muscle) to Stage 4 (more fat than muscle) in upper subscapularis, infraspinatus, supraspinatus, teres minor and rhomboid in both operated and unoperated shoulder.
Time frame: two year post surgery
Fatty atrophy in Rotator Cuff Muscles in both shoulders
CT Scan to evaluate fatty degeneration in Rotator Cuff Muscles - present or absent in upper subscapularis, infraspinatus, supraspinatus, teres minor and rhomboid muscles in both operated and unoperated shoulders.
Time frame: one year post surgery
Fatty atrophy in Rotator Cuff Muscles in both shoulders
CT Scan to evaluate fatty degeneration in Rotator Cuff Muscles - present or absent in upper subscapularis, infraspinatus, supraspinatus, teres minor and rhomboid muscles in both operated and unoperated shoulders.
Time frame: two year post surgery