Publications by authors named "Ohyama S"
Overview Of Literature: There are no established treatments for low back pain. Conventional treatments include physiotherapy and pharmacological treatments, such as non-steroidal anti-inflammatory drugs (NSAIDs). Recently, analgesics with mechanisms of action different from those of NSAIDs have emerged.
View Article and Find Full Text PDFBackground: Patients with residual adolescent idiopathic scoliosis (AIS) and thoracolumbar/lumbar curves may present with progression after cessation of growth, with lateral translation as a major risk factor. Nonetheless, radiographic predictors and underlying mechanisms remain indefinite. This study aimed to determine these radiographic predictors and structural mechanisms in patients with residual AIS.
View Article and Find Full Text PDFObjective: The objective of this study was to determine whether a reduction in the retrocrural space (RCS) area is a risk factor for postoperative ileus (POI) in patients with adult spinal deformity (ASD) treated with spinal corrective surgery.
Methods: In total, 100 patients (mean age 67.5 ± 8.
【PURPOSE】: Diffusion Tensor Imaging (DTI) with tractography is useful for the functional diagnosis of degenerative lumbar disorders. However, it is not widely used in clinical settings due to time and health care provider costs, as it is performed manually on hospital workstations. The purpose of this study is to construct a system that extracts the lumbar nerve and generates tractography automatically using deep learning semantic segmentation.
View Article and Find Full Text PDFBackground: Proximal femoral fractures in geriatric patients are a major challenge in orthopedics, often leading to major functional impairment. Early surgical intervention is crucial for improving patient recovery and overall health outcomes. Thus, Japan's Ministry of Health, Labour and Welfare initiated a reimbursement policy in April 2022 to encourage early surgery for these fractures in patients aged ≥75 years.
View Article and Find Full Text PDFObjective: This study aims to comprehend the natural history of adolescent idiopathic scoliosis (AIS) patients and determine risk factors for facet joint bridging in adolescent-onset adult idiopathic scoliosis with thoracolumbar/lumbar (TL/L) curves.
Methods: We included 50 patients with residual AIS with TL/L curves (3 males, 47 females; age 41.5 ± 17.
Article Synopsis
- The study evaluates a new imaging technique called MIXTURE, developed by Philips, which produces high-resolution T2 maps for diagnosing cervical radiculopathy.
- It compares T2 relaxation times and their variability using MIXTURE with another method, SHINKEI-Quant (S-Q), in both healthy participants and a patient with cervical disc herniation.
- Results show that MIXTURE provides significantly shorter T2 relaxation times and lower variability in measurements, indicating its potential for more accurate preoperative functional diagnosis of cervical nerve issues.
Background: Balloon kyphoplasty (BKP) is a method for the management of osteoporotic vertebral body fracture (OVF). However, improvement in back pain (BP) is poor in some patients, also previous reports have not elucidated the exact incidence and risk factors for residual BP after BKP. We clarified the characteristics of residual BP after BKP in patients with OVF.
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- This research examined the link between spinal characteristics and the length of the abdominal aorta in adult spinal deformity patients who had corrective surgery.
- Thirteen patients were studied, revealing that the abdominal aorta length increased post-surgery by an average of 4.8%.
- A negative correlation was found between changes in spinal alignment (specifically thoracolumbar kyphosis) and changes in aorta length, suggesting that spinal correction affects aorta elongation.
Article Synopsis
- Lateral lumbar interbody fusion (LLIF) techniques are commonly used for adult spinal deformity surgery, and proper patient positioning on the surgical table is crucial for safety.
- This study analyzed data from 59 patients to determine the optimal angle for patient positioning using three-dimensional computed tomography (3DCT) images.
- The findings suggest that by positioning patients at the calculated optimal mean angle (OMA), the rotation of the surgical table is minimized, enhancing safety and efficiency during the procedure.
Article Synopsis
- Conventional methods for assessing vertebral rotation post-surgery are not comprehensive and this study focuses on using inverse trigonometric functions for analyzing adolescent idiopathic scoliosis (AIS) after posterior fusion surgery.
- The study analyzed data from 78 AIS patients, measuring rotation angles right after surgery and at two and five years later, finding a strong correlation between traditional CT measurements and calculated angles.
- The findings indicate the inverse trigonometric method effectively measures post-surgical rotation, with minimal changes over five years, while also identifying complications like the crankshaft phenomenon in a small percentage of patients.
Spinal fixation surgery has been increasingly performed in patients with osteoporosis. Romosozumab, a drug that was introduced in Japan recently, is known to possibly promote bone healing. However, few studies have reported the therapeutic effects of romosozumab in clinical practice in Japan.
View Article and Find Full Text PDFThe prognosis of recurrent gastric cancer is generally poor, and aggressive surgical treatment is rarely performed. Herein, we present the case of a patient who underwent resection of cerebellar and adrenal gland metastases from gastric cancer. The patient was treated for gastric cancer with distal gastrectomy at 23 years and for remnant gastric cancer with completion gastrectomy at 48 years.
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- The study aimed to compare patient outcomes using expandable versus static interbody spacers during oblique lateral interbody fusion (OLIF) surgery, utilizing CT and MRI imaging for evaluations.
- A total of 35 patients with degenerative disc disease were analyzed, measuring factors like cage height, lordosis, pain levels, and radiologic changes both preoperatively and 6 months post-op.
- Results indicated that expandable spacers provided better clinical outcomes, including less cage subsidence, improved dural sac area, better correction of vertebral slippage, and reduced leg numbness compared to static spacers.
Study Design: Retrospective cohort study.
Objective: To develop a machine learning (ML) model that predicts the progression of AIS using minimal radiographs and simple questionnaires during the first visit.
Summary Of Background Data: Several factors are associated with angle progression in patients with AIS.
Article Synopsis
- Pyogenic vertebral osteomyelitis (PVO) is a common infection among the elderly that can lead to serious complications like abscesses, often making traditional treatments ineffective.
- A case study focused on a 76-year-old man suffering from PVO and abscesses who didn't respond to antibiotics, undergoing a two-stage surgical procedure for treatment.
- The innovative use of retroperitoneal continuous local antibiotic perfusion (CLAP) during surgery showed significant success, greatly reducing pain and the size of abscesses, highlighting its potential as a new treatment option for resistant cases.
Introduction: This study aimed to determine whether the proximity of the median arcuate ligament (MAL) and the celiac artery (CA) changes in patients following surgery to correct adult spinal deformity (ASD). We hypothesized that the distance between the MAL and the CA shortens after corrective spinal surgery, which may cause acute celiac artery compression syndrome (ACACS).
Methods: A total of 89 patients (68.
Objective: The first sacral nerve root block (S1 NRB) is used to diagnose and treat lumbosacral and radicular pain. This study aims to clarify the anatomy of the S1 neural foramen using three-dimensional (3D) computed tomography (CT) images and to establish the optimal fluoroscopic angle, localize the S1 neural foramen on fluoroscopy, and determine the safe puncture depth for S1 NRB.
Methods: In this single-center cohort study, 200 patients with lumbar degenerative disease who underwent preoperative CT were enrolled.
Article Synopsis
- The study investigated the incidence and risk factors of superior mesenteric artery syndrome (SMAS) in patients with adult spinal deformity (ASD) post spinal surgery.
- Out of 102 patients, only 2 (2%) were diagnosed with SMAS, with some spinal parameters showing significant correlations to the condition.
- It was concluded that smaller thoracolumbar kyphosis and greater upper lumbar lordosis post-surgery could be risk factors for SMAS, suggesting surgeons should avoid overcorrecting the upper lumbar spine.
Article Synopsis
- Neurofibromatosis type 1 (NF1) is often linked to gastrointestinal stromal tumors (GISTs), particularly in the small intestine, characterized by a tendency for multiple tumors, low growth activity, and generally good outcomes.
- A woman in her forties with a family history of NF1 presented with abdominal pain, leading to the discovery of a large cystic mass and a smaller solid mass in her abdomen, confirmed via various imaging techniques.
- Surgical exploration revealed a multicystic tumor in the jejunum along with a solid tumor, both showing benign characteristics under microscopic examination and confirming a diagnosis of multiple GISTs in the context of NF1.
Background and objective The surgery to correct adult spinal deformity (ASD) is associated with a rare, but life-threatening complication called acute celiac artery compression syndrome (ACACS). To our knowledge, there is currently no study in the literature regarding the abnormal elevation of serum levels of hepatobiliary enzymes after surgery to correct the deformity. In light of this, the purpose of this study was to investigate this potential association.
View Article and Find Full Text PDFIntroduction: This study aims to investigate risk factors for cage subsidence following minimally invasive lateral corpectomy for osteoporotic vertebral fractures.
Methods: Eight males and 13 females (77.2±6.
Sarcopenia is defined as decreasing in muscle strength and mass, and dynapenia is defined as decreasing in muscle strength and maintained muscle mass. This study elucidated the prevalence and characteristics of sarcopenia and dynapenia and evaluate in elderly spinal disorders patients. 1039 spinal disorders patients aged ≥ 65 years were included.
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