1.Is the Subscapularis Function Preserved after the Latarjet Procedure? A Quantitative Analysis Using Positron Emission Tomography
Kazuho AIZAWA ; Nobuyuki YAMAMOTO ; Jun KAWAKAMI ; Takayuki MURAKI ; Shoichi WATANUKI ; Kotaro HIRAOKA ; Manabu TASHIRO ; Toshimi AIZAWA ; Eiji ITOI
Clinics in Orthopedic Surgery 2025;17(2):274-282
Background:
In the Latarjet procedure, the subscapularis is divided at the superior two-thirds junction. It has been believed that this subscapularis split approach resulted in better internal rotation strength rather than an L-shaped subscapularis tenotomy. However, there are few studies demonstrating the preserved function of the subscapularis after the Latarjet procedure. The aim of the present study was to clarify the subscapularis activity using positron emission tomography (PET) in patients after the Latarjet procedure.
Methods:
Six men who had undergone the Latarjet procedure were enrolled. The internal rotation exercise with elastic bands was performed with the arm at 0° and 90° of abduction. After the exercises, the patients had an intravenous injection of fluorine 18 fluorodeoxyglucose ( 18 F FDG). Each PET image was fused to the corresponding computed tomography image to calculate the standardized uptake value (SUV). The internal rotation muscle strength was measured by a dynamometer.
Results:
At 0° of abduction, the subscapularis SUVs of the involved side were significantly lower than those of the uninvolved side (p = 0.010), although there was no significant difference at 90° of abduction. The SUVs of the involved subscapularis were significantly lower at 0° of abduction than at 90° (p = 0.034). The internal rotation strength of the involved side was 81.1% ± 12.1% of the uninvolved side at 0° of abduction.
Conclusions
After the Latarjet procedure with the subscapularis split approach, subscapularis activity was well preserved at 90° of abduction. However, internal rotation strength was reduced by 19%.
2.Is the Subscapularis Function Preserved after the Latarjet Procedure? A Quantitative Analysis Using Positron Emission Tomography
Kazuho AIZAWA ; Nobuyuki YAMAMOTO ; Jun KAWAKAMI ; Takayuki MURAKI ; Shoichi WATANUKI ; Kotaro HIRAOKA ; Manabu TASHIRO ; Toshimi AIZAWA ; Eiji ITOI
Clinics in Orthopedic Surgery 2025;17(2):274-282
Background:
In the Latarjet procedure, the subscapularis is divided at the superior two-thirds junction. It has been believed that this subscapularis split approach resulted in better internal rotation strength rather than an L-shaped subscapularis tenotomy. However, there are few studies demonstrating the preserved function of the subscapularis after the Latarjet procedure. The aim of the present study was to clarify the subscapularis activity using positron emission tomography (PET) in patients after the Latarjet procedure.
Methods:
Six men who had undergone the Latarjet procedure were enrolled. The internal rotation exercise with elastic bands was performed with the arm at 0° and 90° of abduction. After the exercises, the patients had an intravenous injection of fluorine 18 fluorodeoxyglucose ( 18 F FDG). Each PET image was fused to the corresponding computed tomography image to calculate the standardized uptake value (SUV). The internal rotation muscle strength was measured by a dynamometer.
Results:
At 0° of abduction, the subscapularis SUVs of the involved side were significantly lower than those of the uninvolved side (p = 0.010), although there was no significant difference at 90° of abduction. The SUVs of the involved subscapularis were significantly lower at 0° of abduction than at 90° (p = 0.034). The internal rotation strength of the involved side was 81.1% ± 12.1% of the uninvolved side at 0° of abduction.
Conclusions
After the Latarjet procedure with the subscapularis split approach, subscapularis activity was well preserved at 90° of abduction. However, internal rotation strength was reduced by 19%.
3.Is the Subscapularis Function Preserved after the Latarjet Procedure? A Quantitative Analysis Using Positron Emission Tomography
Kazuho AIZAWA ; Nobuyuki YAMAMOTO ; Jun KAWAKAMI ; Takayuki MURAKI ; Shoichi WATANUKI ; Kotaro HIRAOKA ; Manabu TASHIRO ; Toshimi AIZAWA ; Eiji ITOI
Clinics in Orthopedic Surgery 2025;17(2):274-282
Background:
In the Latarjet procedure, the subscapularis is divided at the superior two-thirds junction. It has been believed that this subscapularis split approach resulted in better internal rotation strength rather than an L-shaped subscapularis tenotomy. However, there are few studies demonstrating the preserved function of the subscapularis after the Latarjet procedure. The aim of the present study was to clarify the subscapularis activity using positron emission tomography (PET) in patients after the Latarjet procedure.
Methods:
Six men who had undergone the Latarjet procedure were enrolled. The internal rotation exercise with elastic bands was performed with the arm at 0° and 90° of abduction. After the exercises, the patients had an intravenous injection of fluorine 18 fluorodeoxyglucose ( 18 F FDG). Each PET image was fused to the corresponding computed tomography image to calculate the standardized uptake value (SUV). The internal rotation muscle strength was measured by a dynamometer.
Results:
At 0° of abduction, the subscapularis SUVs of the involved side were significantly lower than those of the uninvolved side (p = 0.010), although there was no significant difference at 90° of abduction. The SUVs of the involved subscapularis were significantly lower at 0° of abduction than at 90° (p = 0.034). The internal rotation strength of the involved side was 81.1% ± 12.1% of the uninvolved side at 0° of abduction.
Conclusions
After the Latarjet procedure with the subscapularis split approach, subscapularis activity was well preserved at 90° of abduction. However, internal rotation strength was reduced by 19%.
4.Is the Subscapularis Function Preserved after the Latarjet Procedure? A Quantitative Analysis Using Positron Emission Tomography
Kazuho AIZAWA ; Nobuyuki YAMAMOTO ; Jun KAWAKAMI ; Takayuki MURAKI ; Shoichi WATANUKI ; Kotaro HIRAOKA ; Manabu TASHIRO ; Toshimi AIZAWA ; Eiji ITOI
Clinics in Orthopedic Surgery 2025;17(2):274-282
Background:
In the Latarjet procedure, the subscapularis is divided at the superior two-thirds junction. It has been believed that this subscapularis split approach resulted in better internal rotation strength rather than an L-shaped subscapularis tenotomy. However, there are few studies demonstrating the preserved function of the subscapularis after the Latarjet procedure. The aim of the present study was to clarify the subscapularis activity using positron emission tomography (PET) in patients after the Latarjet procedure.
Methods:
Six men who had undergone the Latarjet procedure were enrolled. The internal rotation exercise with elastic bands was performed with the arm at 0° and 90° of abduction. After the exercises, the patients had an intravenous injection of fluorine 18 fluorodeoxyglucose ( 18 F FDG). Each PET image was fused to the corresponding computed tomography image to calculate the standardized uptake value (SUV). The internal rotation muscle strength was measured by a dynamometer.
Results:
At 0° of abduction, the subscapularis SUVs of the involved side were significantly lower than those of the uninvolved side (p = 0.010), although there was no significant difference at 90° of abduction. The SUVs of the involved subscapularis were significantly lower at 0° of abduction than at 90° (p = 0.034). The internal rotation strength of the involved side was 81.1% ± 12.1% of the uninvolved side at 0° of abduction.
Conclusions
After the Latarjet procedure with the subscapularis split approach, subscapularis activity was well preserved at 90° of abduction. However, internal rotation strength was reduced by 19%.
5.Prevalence of pain and depression and their coexistence in patients with early stage of Parkinson’s disease
Shinji Ohara ; Ryoichi Hayashi ; Katsuhiko Kayanuma ; Harumi Kuwabara ; Kotaro Aizawa ; Hiroshi Koshihara ; Kenya Oguchi ; Yo-ichi Takei ; Naoko Tachibana
Neurology Asia 2015;20(3):355-361
Depression and pain are common and often early non-motor symptoms of Parkinson disease (PD).
The relationship between pain and depression in PD has been unsettled, with conflicting findings.
The PD patients followed up at the general neurology outpatient clinics were requested to complete
Beck Depression Inventory (BDI) and McGill pain questionnaire. The patients were categorized in
three groups according to the Hoehn-Yahr (H-Y) stage of PD; mild (stage I&II), moderate (stage III)
and advanced stage (stage IV&V), and group comparisons were performed in each group between
those with and without pain. A total of 186 patients completed the questionnaires. Their mean age was
74±9.3 years, and the mean H-Y stage was 2.8±0.8.Sixty-nine percent of the patients reported pain
symptoms of various natures. The BDI scores were significantly higher in the pain group (P< 0.0001)
despite the absence of statistically significant differences in the mean age, H-Y stage, and duration of
illness. Only PD patients of mild stage revealed significant difference of BDI scores between those
with pain and without pain (P <0.001). Our results showed that pain is a common symptom in patients
with PD and suggest that it may be related to depression in the early stage of the disease.
6.Prevalence of pain and depression and their coexistence in patients with early stage of Parkinson’s disease
Shinji Ohara ; Ryoichi Hayashi ; Katsuhiko Kayanuma ; Harumi Kuwabara ; Kotaro Aizawa ; Hiroshi Koshihara ; Kenya Oguchi ; Yo-ichi Takei ; Naoko Tachibana
Neurology Asia 2015;20(4):355-361
Depression and pain are common and often early non-motor symptoms of Parkinson disease (PD).
The relationship between pain and depression in PD has been unsettled, with conflicting findings.
The PD patients followed up at the general neurology outpatient clinics were requested to complete
Beck Depression Inventory (BDI) and McGill pain questionnaire. The patients were categorized in
three groups according to the Hoehn-Yahr (H-Y) stage of PD; mild (stage I&II), moderate (stage III)
and advanced stage (stage IV&V), and group comparisons were performed in each group between
those with and without pain. A total of 186 patients completed the questionnaires. Their mean age was
74±9.3 years, and the mean H-Y stage was 2.8±0.8.Sixty-nine percent of the patients reported pain
symptoms of various natures. The BDI scores were significantly higher in the pain group (P< 0.0001)
despite the absence of statistically significant differences in the mean age, H-Y stage, and duration of
illness. Only PD patients of mild stage revealed significant difference of BDI scores between those
with pain and without pain (P <0.001). Our results showed that pain is a common symptom in patients
with PD and suggest that it may be related to depression in the early stage of the disease.
Parkinson Disease