Publications by authors named "Sairyo Koichi"

Aims/introduction: This study examined the effects of high-intensity interval walking training (IWT) compared to moderate-intensity continuous walking training (CWT) on muscle strength, walking ability, and health-related quality of life (QOL) in people with diabetes accompanied by lower extremity weakness.

Materials And Methods: People with diabetes accompanied by low isometric knee extensor strength using a simple manual dynamometer (n = 50) were screened and randomly divided into 2 groups: CWT (n = 25) and IWT (n = 25). Both groups were instructed by a physical therapist to perform walking training with the goal of 120 min/week over a 5-month period.

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Introduction: Full endoscopic spine surgery continues to spread worldwide but has a long learning curve. Conventional endoscopy training uses live pigs or human cadavers, which has disadvantages such as high costs and limited availability. Therefore, this study aimed to develop and evaluate three-dimensional (3D)-printed models for endoscopy training.

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  • The study investigates the relationship between subcoracoid bursa (SCB) effusion and factors like rotator cuff tears (RCT) using MRI in patients with shoulder pain.
  • Out of 80 analyzed shoulders, 41.3% exhibited SCB effusion, with RCT being significantly associated with SCB effusion presence.
  • The size of the SCB effusion was larger in shoulders with RCT compared to those without, indicating possible pathological links in shoulder conditions.
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  • This report discusses the successful treatment of a 13-year-old boy with an acute avulsion fracture of the ischial tuberosity using a new approach involving suture anchor fixation.
  • The injury occurred during running, leading to a significant displacement of the fractured fragment, which required surgical intervention 5 days later.
  • Post-surgery, the patient showed complete bone fusion after one year and was able to return to competitive sports, demonstrating the effectiveness of the suture bridge technique with multiple anchors for this type of fracture.
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Background: In Japan, the Japanese Orthopedic Association (JOA) score is widely used as a clinician-reported outcome after shoulder surgery. However, Shoulder36 is positioned as a general patient-reported outcome measure. This study aimed to determine the correlations between the JOA score and scores in the domains of the Shoulder36 and their minimal clinically important differences (MCIDs) and cutoff values for the patient-acceptable symptom state (PASS) after unilateral arthroscopic rotator cuff repair (ARCR).

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Open axillary arterial injury is life-threatening, and upper-extremity reperfusion must be performed within approximately 6 h. We present the case of a patient who underwent reperfusion of the upper limb and nerve reconstruction of the post-ganglionic brachial plexus injury in one stage while maintaining stable vital signs. The injury was an avulsion with no fracture.

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  • * The patient initially had successful surgery for lumbar spinal canal stenosis, but complications arose during the second stage due to a Mobitz type II atrioventricular block, leading to emergency interventions like percutaneous pacing and temporary pacemaker insertion.
  • * The report emphasizes the importance of thorough monitoring of elderly patients during surgery under local anesthesia to quickly address any unexpected emergencies, similar to the precautions taken with general anesthesia.
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Background: Hirayama disease (HD) is characterized by slow progression of muscle atrophy without sensory disturbance in a single upper extremity in adolescent boys. HD can be treated using both conservative measures and surgery. However, the optimal treatment remains controversial.

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  • Foraminal stenosis is a type of lumbar spinal stenosis that can be treated with full-endoscopic spine surgery (FESS), especially in patients with stable isthmic spondylolisthesis at L5.
  • The article outlines the process for achieving complete decompression, emphasizing the importance of visualizing the "pars crisscross" structure during the procedure.
  • The step-by-step method involves docking an 8 mm cannula, removing specific bone structures, and confirming decompression of the L5 nerve root, making it the first detailed guide for this surgery under local anesthesia.
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  • * It included 119 women with RA and a control group of 288 women without RA, examining factors like trabecular bone score (TBS) and hip structure analysis (HSA) through dual-energy X-ray absorptiometry.
  • * Results showed no significant differences in BMD between groups, but women on glucocorticoids had a lower TBS compared to those not on them, highlighting the need for doctors to consider TBS along with BMD when treating RA patients.
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Objectives: To investigate the relationship between the size and location of osteochondral defects in capitellar osteochondritis dissecans (OCD) measured on coronal and sagittal reconstructed computed tomography (CT) images and the clinical outcomes of arthroscopic debridement in adolescent baseball players.

Methods: This retrospective study investigated the clinical outcomes of arthroscopic debridement for capitellar OCD in adolescent baseball players with ≥24 months of follow-up after surgery between 2008 and 2020. On preoperative coronal CT images, medial and lateral distance (%) were used to evaluate the location of the defect.

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Background: Both scapular dynamics and static scapular position are important in the treatment of shoulder dysfunction. This study aimed to create an index that can evaluate scapular position on plain radiographs and evaluate the relation between scapular position and posture accurately.

Methods: Using four fresh frozen cadavers, we developed a glenoid angle grade based on the degree of overlap between the shadow of the coracoid inflection point and the upper edge of the scapula on frontal plain radiographs: grade 1, no overlap; grade 2, overlaps by less than half of the shadow; grade 3, overlaps by more than half.

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  • The study examined the 1-year results of four treatments for lumbar disc herniation: transforaminal full-endoscopic lumbar discectomy (TF-FED), condoliase injection, open discectomy (OD), and microendoscopic discectomy (MED) among 279 patients.
  • No significant differences were found in pain and functional outcomes (JOABPEQ, VAS scores), complication rates, or nerve injury rates among the surgical methods, but condoliase injection had a higher reoperation rate due to residual herniation.
  • TF-FED and condoliase injection were less expensive and involved less blood loss since they can be done under local anesthesia, but both showed increased disc degeneration and end
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Romosozumab is an anti-sclerostin antibody that increases bone formation and decreases bone resorption. It became available for patients at high risk of osteoporotic fractures in Japan in 2019. The aim of this study was to clarify the clinical effects, safety, and predictors of the effectiveness of 12 months of romosozumab therapy.

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  • Osteoporotic vertebral fractures (OVF) are common in older adults and can lead to conditions like radiculopathy due to foraminal stenosis.
  • An 89-year-old woman experienced leg pain for 5 years, diagnosed with radiculopathy from OVF-related foraminal stenosis, and was treated successfully using a minimally invasive procedure while avoiding general anesthesia due to her severe heart disease.
  • Post-surgery, the patient had immediate relief from leg pain, confirmed by follow-up scans, showing that full-endoscopic procedures can be effective for high-risk elderly patients.
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Background: Augmented reality navigation is the one of the navigation technologies that allows computer-generated virtual images to be projected onto a real-world environment. Augmented reality navigation can be used in spinal tumor surgery. However, it is unknown if there are any pitfalls when using this technique.

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  • Transforaminal full-endoscopic spine surgery (FESS) is a minimally invasive spinal surgery that can be done under local anesthesia, making it suitable for elderly patients.
  • The study presents three cases of patients aged 90 and older who underwent FESS for severe leg pain and achieved successful outcomes with no complications.
  • The findings suggest that FESS is a promising option for elderly patients with various medical conditions, allowing for effective pain relief and quicker recovery.
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  • Early detection and conservative treatment are crucial for the best outcomes in managing capitellar osteochondritis dissecans (OCD) in young baseball players.
  • A study conducted in Tokushima, Japan, between 2006 and 2020 revealed that ultrasonographic screening was significantly more effective in identifying OCD compared to physical examinations.
  • The prevalence of capitellar OCD among elementary school players was found to be 1.4%, with the incidence increasing from the fourth grade to the sixth grade.
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Presently, the invasiveness of direct repair surgery for lumbar spondylolysis is relatively high. Thus, high school and junior high school students who play sports often cannot return to sports before graduation because of the invasiveness. The use of a robotic system enabled an accurate and minimally invasive procedure.

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Background: Full-endoscopic spine surgery via a transforaminal approach (TF-FESS) is minimally invasive and could help athletes quickly return to play. When treating professional athletes, we have to consider their season schedule. In this study, we investigated the characteristics of Japanese professional baseball players who underwent TF-FESS and examine how the timing of surgery influenced their postoperative course.

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Objective: To determine the effects of thoracic stiffness on mechanical stress in the lumbar spine during motion.

Methods: To evaluate the effect of preoperative thoracic flexibility, stiff and flexible spine models were created by changing the material properties of ligaments and discs in the thoracic spine. Total laminectomy was performed at L4/5 in stiff and flexible models.

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  • * A study examined the relationship between hand dominance and facet joint size in 25 Japanese baseball players with back pain, noting significant differences in joint morphology between pitchers and fielders.
  • * Results showed that pitchers had larger nondominant side facet joints compared to dominant ones, while fielders had the opposite, highlighting how their dominant hand influences facet joint development.
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Introduction: Trabecular bone score (TBS) is partially independent of fracture risk. Reference values for TBS have not been established in official guidelines, and thus clinicians often have difficulty interpreting TBS results. This study aimed to investigate whether reference values for TBS could be a valid indicator for clinical vertebral fracture (CVF).

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  • Fluoroscopy is crucial for orthopedic surgeries but poses health risks due to radiation exposure to the surgical team.
  • This study used cadavers to measure radiation doses during hip surgeries, finding that exposure was significantly higher during lateral imaging compared to posteroanterior imaging for the surgeon.
  • The results suggest reducing lateral imaging time and maintaining distance from fluoroscopy equipment can minimize radiation exposure for surgical team members, especially nurses and anesthesiologists.
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The purpose of this study is to evaluate the results and intraoperative or postoperative complications of primary total hip arthroplasty (THA) using a contemporary tapered wedge titanium femoral component. A total of 213 THAs in 187 patients were followed up more than 5 years (mean, 102 months ; range, 60-150). The mean age at surgery was 64.

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