Retear Rate Between 1 and 2 Years Postoperatively After Arthroscopic Rotator Cuff Repair Is Over 30% and Associated With Higher Tear Size and Fatty Degeneration.

Purpose: The purpose of this study was to evaluate the integrity of the repaired rotator cuff between 1 and 2 years postoperatively after arthroscopic rotator cuff repair (ARCR) using magnetic resonance imaging (MRI), investigate the factors affecting its change, and assess the association between the change and postoperative clinical outcomes.

Methods: Rotator cuff tear patients who underwent ARCR and were evaluated by MRI before surgery, and 1 and 2 years after ARCR with a minimum of 2-year follow-up were included in this study. Repair integrity was evaluated using Sugaya's classification, and according to the classification types IV and V were defined as retears.

The 1st World Congress of Nuclear Medicine and Biology held in Japan: a historical review with personal reminiscences.

The 1st World Congress of Nuclear Medicine and Biology was held from September 30 to October 4 1974 in Japan. This was an epoch-making event in the history of Nuclear Medicine in Japan as well as in the World. The huge success of the meeting contributed a lot to the rapid and remarkable progress of nuclear medicine thereafter.

Radiation Exposure During Lumbar Interbody Fusion Surgery Can Be Reduced by Using a Three-Dimensional Patient-Specific Template Guide.

Background: The use of posterior lumber interbody fusion (PLIF) using cortical bone trajectory (CBT) with a patient-specific 3D template guide is increasingly widespread. To our knowledge, no studies have extensively evaluated the reduction of radiation exposure when using patient-specific drill template guides. The purpose of this study is to compare the intra-operative radiation dose and surgeon's exposure to radiation in CBT-PLIF when using a patient-specific drill guide with that in traditional minimally invasive (MIS)-PLIF.

Effective screening methods to prevent surgical site infections in orthopedic surgery: an observational study.

Background: The bacterial source of surgical-site infections (SSIs) can have either endogenous and/or exogenous origins, and some studies have revealed that endogenous transmission is an important pathway for SSIs in orthopedic surgery. However, since the frequency of SSIs is low (0.5-4.

Novel within ring fixation using iliac screws and an iliosacral screw locking system technique for fragility fracture of the pelvis.

Background: Surgical indications for fragility fracture of the pelvis (FFP) have been reconsidered recently, and the indications to perform surgery have increased. However, the optimal surgical method to obtain sufficiently strong fixation in elderly patients with minimal invasiveness is not yet clear. In this report, we present the case of a patient with FFP who was treated with a novel posterior within ring fixation technique using a combination of iliac screws and an implant that locks the original iliosacral (IS) screw in the sacrum.

Lateral Bowing of Femur Associated With Older Age, Shorter Stature, and Lower Bone Mineral Density.

We often encounter elderly patients with femur bowing. According to literature, femoral bowing is correlated with patient characteristics such as aging, race, atypical femoral fracture (AFF), and osteoporosis. However, the clear relationships between these factors and femoral bowing are still unknown.

Open Reduction and Internal Fixation of Simultaneous, Bilateral, Atypical Femoral Shaft Fractures After Nine Years of Bisphosphonate Treatment.

Bisphosphonates are generally used to treat osteoporosis and decrease the risk of femoral neck and vertebral fractures in patients with osteoporosis. Recently, it has been suggested that long-term bisphosphonate use can lead to decreased bone remodeling and an increased risk of atypical fractures. Atypical fractures often occur in the femur.

Preferential Adsorption of Propylene over Propane on a Ag-Exchanged X-Type Zeolite Membrane.

We investigated the adsorption properties of propylene and propane on an olefin-selective Ag-X membrane and discussed the contribution of adsorption selectivity to propylene/propane separation performance through this membrane. The isotherms of propylene and propane on Ag-X membranes were measured in unary systems at 313 K. The amount of propylene adsorbed on the Ag-X membrane at a lower pressure increased remarkably compared with that on the Na-X membrane.

Nuclear oncology as seen by me in Japan: a historical review and future perspective.

Since 1964 the author has seen and experienced the progress of nuclear medicine in Japan. The purpose of this review article is to trace the application of radiopharmaceuticals and instruments for the diagnosis of tumors and treatment of cancers in the past 55 years. The application of various radiopharmaceuticals for the detection of tumors and therapy of cancers are historically reviewed based on the author's personal clinical experience and research work.

Relative contribution of sensory characteristics for different types of pork loin, assessed by temporal dominance of sensations.

Background: Sensory perception is a dynamic process occurring sequentially. The dynamic analysis of the perception of sensory characteristics in meat is important to understand complex meat sensory characteristics. Temporal dominance of sensations (TDS) is a dynamic sensory method that captures the 'dominance of sensations' throughout food consumption, and it is possible to calculate the relative contribution of various sensory characteristics by 'dominance rate' over time.

Influence of a nerve injury proximal to the suprascapular nerve on healing of repaired rotator cuff tear.

Background: Massive rotator cuff tears have a high rate of re-injury because of severe fatty infiltration. Our data showed that injuries proximal to the suprascapular nerve may be one cause of massive rotator cuff tears. The purpose of this study was to evaluate, using a rat model, how brachial plexus injury associated with a massive rotator cuff tear influences healing of the rotator cuff repair.

Olefin Selective Ag-Exchanged X-Type Zeolite Membrane for Propylene/Propane and Ethylene/Ethane Separation.

Propylene/propane and ethylene/ethane separation was examined with Ag-exchanged X-type zeolite membrane (Ag-X membrane). The Na-X membrane was prepared on a porous tubular α-alumina support by a secondary growth method. The resulting Na-X membrane was ion-exchanged by using AgNO aq.

Histological analysis and biomechanical evaluation of fatty infiltration after rotator cuff tear and suprascapular nerve injury in a rat model.

Background: Rotator cuff tears are the most common shoulder injury, and little is known about the underlying etiology of fatty infiltration after rotator cuff tear. Previous studies speculated that rotator cuff tears lead to neural injury due to tethering of the suprascapular nerve at the notch. This study aimed to evaluate fatty infiltration after suprascapular nerve injury and rotator cuff tears.

Relationship between neuropathy proximal to the suprascapular nerve and rotator cuff tear in a rodent model.

Background: Rotator cuff tears are believed to coexist with cervical spine lesions. In cases of preexisting neuropathy, such as cervical spine lesions, fatty degeneration has likely already occurred due to the neuropathy. In these cases, rotator cuff tear is thought to occur easily because of preexisting extensive fatty degeneration and degeneration of the tendons due to neuropathy.

Macroscopic and histologic evaluation of a rat model of chronic rotator cuff tear.

Background: The major cause of rotator cuff tears in humans is thought to be tendon degeneration. Although some studies have reported chronic rotator cuff tear models in animals, few studies of chronic rat models have demonstrated persistent defects for a relatively long time. The purpose of this study was to establish a chronic rotator cuff tear model in the rat and to evaluate the model macroscopically and histologically.

In vivo 3-dimensional analysis of scapular and glenohumeral kinematics: comparison of symptomatic or asymptomatic shoulders with rotator cuff tears and healthy shoulders.

Background: Alteration in shoulder kinematics has been suggested as one cause of symptoms in shoulders with rotator cuff tears (RCTs). However, only a few studies comparing symptomatic and asymptomatic RCTs using kinematic analysis have been performed. The purpose of this study was to compare 3-dimensional (3D) scapular and glenohumeral kinematics during scapular-plane abduction among symptomatic RCTs, asymptomatic RCTs, and healthy shoulders.

Efficacy of hyaluronic acid or steroid injections for the treatment of a rat model of rotator cuff injury.

This study evaluated dorsal root ganglia from C3-C7, analyzed gait, and compared the expression of calcitonin gene-related peptide (CGRP) which was a marker of inflammatory pain in a rat rotator cuff tear model in which the supraspinatus and infraspinatus tendons were detached; comparisons were made to a sham group in which only the tendons were exposed. Fluorogold was injected into the glenohumeral joint 21 days after surgery in both groups, and saline, steroids, or hyaluronic acid was injected into the glenohumeral joint in the rotator cuff tear group 26 days after surgery. The proportions of CGRP-immunoreactive neurons were higher and the gait parameters were impaired in the rotator cuff tear group compared to in the sham group.

Potential requirement of positron emission tomography apparatuses in Asia and latin america including Mexico.

The number of positron emission tomography (PET) machines has been increasing in regions of East-, Southeast-, and South-Asia as well as in Latin America including Mexico. This study was performed to assess the potential requirement of PET machines in 19 countries which already use PET in the aforementioned regions. Data on the number of PET machines and internationally available characteristics of the restrictive countries such as the land area, the total population, the gross national income (GNI), and the average life span of inhabitants were obtained from IAEA, UN, WB, and WHO.

Two-staged hindfoot reconstruction with vascularized fibula graft for calcaneal osteomyelitis caused by methicillin-resistant Staphylococcus aureus: a case report.

Hindfoot reconstruction after calcaneal osteomyelitis is a challenging procedure designed to restore the weight bearing function of the heel and to allow a functional reconstruction of the Achilles tendon. Some patients require subtalar arthrodesis after primary calcaneal osteosyntesis or hindfoot reconstruction due to the considerable pain associated with weight-bearing caused by the irregular surface of the subtalar joint. To date, no reports have shown a case of hindfoot reconstruction with subtalar arthrodesis using a pedicled vascularized fibula graft.

[Medical management of patients internally contaminated with radionuclides in radionuclide therapy facility and assembly-temporary type therapeutic facility in nuclear emergency].

The utilization of radionuclide therapy facility and temporary therapeutic facility has been proposed for securing the effectiveness of the higher medical management of patients internally contaminated in nuclear emergency. However it is not then practical to conduct all of the medical management. The purpose of the medical management of contaminated patients in the facilities is to continue the medical treatment of the patients who already undergo medication in order to decrease the amount of radionuclides inside of the bodies and reduce possible cancer risks and, from the view point of radiation protection, to prevent the proliferation of radionuclides from the patients and the expansion of secondary radiation exposure from them to the general public.

[Utilization of radionuclide therapy facility and assembly-temporary type therapeutic facility for medical treatment of radioactivity contaminated patients in nuclear emergency].

Medical management of patients internally contaminated in nuclear emergency needs, in addition to general medical treatment, to evaluate doses due to intakes of radioactive materials, to conduct effective treatment with stable isotopes and chelating agents and to keep public away from radioactive materials in and excreted from patients. The idea of medical treatment for internal contamination is demonstrated in the general principles on medical management of victims in nuclear emergency issued by the Cabinet Office in Japan. However, if impressive number patients with internal contamination are generated, the current medical management scheme in nuclear emergency is not able to admit them.

Management of cosmic radiation exposure for aircraft crew in Japan.

The International Commission on Radiological Protection has recommended that cosmic radiation exposure of crew in commercial jet aircraft be considered as occupational exposure. In Japan, the Radiation Council of the government has established a guideline that requests domestic airlines to voluntarily keep the effective dose of cosmic radiation for aircraft crew below 5 mSv y(-1). The guideline also gives some advice and policies regarding the method of cosmic radiation dosimetry, the necessity of explanation and education about this issue, a way to view and record dose data, and the necessity of medical examination for crew.