result 3716 件
| JaLCDOI | 10.18926/AMO/56376 |
|---|---|
| FullText URL | 72_6_583.pdf |
| Author | Park, Se-Jin| Jeong, Hwa-Jae| Shin, Hun-Kyu| Park, Jai Hyung| Lee, Jaewook| Cho, Yongun| Lee, Seok Won| Murase, Tsuyoshi| Ikemoto, Sumika| Sugamoto, Kazuomi| Kim, Eugene| |
| Abstract | We retrospectively evaluated the altered biomechanics of the talus in 15 adult patients (7 males, 8 females) with chronic lateral ankle instability when the ankle joint moved actively from full dorsiflexion to full plantarflexion under a non-weight bearing condition. CT images were taken for the unstable ankle and the contralateral normal (control) ankle. Three-dimensional surface models of both ankle joints were reconstructed from the CT data, and we used a computer simulation program to compare both ankle motions of inversion/eversion in the coronal plane, plantarflexion/dorsiflexion in the sagittal plane, and internal rotation/external rotation in the axial plane. This evaluation method provides in vivo, dynamic, and 3D results of ankle motion. In the ankles with chronic lateral instability and the controls, the average talar rotational movement of inversion (+)/eversion (−) was 19.0° and 15.5° and the internal rotation (+)/external rotation (−) was 30.4° and 20.7°, respectively. Paired t-tests revealed significant differences in the amount of inversion (+)/eversion (−) (p=0.012) and internal rotation (+)/external rotation (−) (p<0.001) between unstable and normal ankle joints. The difference of mean rotational movement in internal rotation (9.7°) was greater than that of inversion (3.5°). Rotational instability should be considered when evaluating chronic lateral ankle instability. |
| Keywords | three-dimensional motion analysis chronic lateral ankle instability talus ankle joint |
| Amo Type | Original Article |
| Publication Title | Acta Medica Okayama |
| Published Date | 2018-12 |
| Volume | volume72 |
| Issue | issue6 |
| Publisher | Okayama University Medical School |
| Start Page | 583 |
| End Page | 589 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | English |
| Copyright Holders | CopyrightⒸ 2018 by Okayama University Medical School |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 30573913 |
| NAID | 120006545161 |
| JaLCDOI | 10.18926/AMO/56375 |
|---|---|
| FullText URL | 72_6_577.pdf |
| Author | Makino, Takuma| Orita, Yorihisa| Tachibana, Tomoyasu| Marunaka, Hidenori| Miki, Kentaro| Akisada, Naoki| Akagi, Yusuke| Usui, Yoshiyuki| Sato, Yasuharu| Yoshino, Tadashi| Nishizaki, Kazunori| |
| Abstract | Since no diagnostic method has been established to distinguish follicular thyroid carcinoma (FTC) from follicular thyroid adenoma (FTA), surgery has been the only way to reach a diagnosis of follicular neoplasm. Here we investigated the computed tomography (CT) features of follicular neoplasms, toward the goal of being able to identify specific CT features allowing the preoperative differentiation of FTC from FTA. We retrospectively analyzed the cases of 205 patients who underwent preoperative CT of the neck and were histopathologically diagnosed with FTC (n=31) or FTA (n=174) after surgery between January 2002 and June 2016 at several hospitals in Japan. In each of these 205 cases, non-enhanced and contrast-enhanced CT images were obtained, and we analyzed the CT features. On univariate analysis, inhomogeneous features of tumor lesions on contrast-enhanced CT were more frequently observed in FTC than in FTA (p=0.0032). A multivariate analysis identified inhomogeneous features of tumor lesions on contrast-enhanced CT images as an independent variable indicative of FTC (p=0.0023). CT thus offers diagnostic assistance in distinguishing FTC from FTA. |
| Keywords | computed tomography follicular thyroid carcinoma follicular thyroid adenoma preoperative diagnosis |
| Amo Type | Original Article |
| Publication Title | Acta Medica Okayama |
| Published Date | 2018-12 |
| Volume | volume72 |
| Issue | issue6 |
| Publisher | Okayama University Medical School |
| Start Page | 577 |
| End Page | 581 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | English |
| Copyright Holders | CopyrightⒸ 2018 by Okayama University Medical School |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 30573912 |
| NAID | 120006545160 |
| JaLCDOI | 10.18926/AMO/56374 |
|---|---|
| FullText URL | 72_6_567.pdf |
| Author | Yagi, Takahito| Takagi, Kosei| Umeda, Yuzo| Yoshida, Ryuichi| Nobuoka, Daisuke| Kuise, Takashi| Fujiwara, Toshiyoshi| |
| Abstract | Living donor liver transplantation (LDLT) is the final therapeutic arm for pediatric end-stage liver diseases. Toward the goal of achieving further improvement in LDLT survival, we investigated factors affecting recipient survival. We evaluated the prognostic factors of 60 pediatric recipients (< 16 years old) who underwent LDLT between 1997 and 2015. In a univariate analysis, non-cholestatic (NCS) disease, graft/recipient body weight ratio, cold and warm ischemic times, and intraoperative blood loss were significant factors impacting survival. In a multivariate analysis, NCS disease was the only significant factor worsening survival (p=0.0021). One-and 5-year survival rates for the cholestatic disease (CS, n=43) and NCS (n=17) groups were 100% vs. 70.6% and 97.4% vs. 58.8% (p=0.004, log-rank). Intergroup comparisons revealed that CS was significantly associated with operation time, cold ischemia, hepatomegaly of the native liver, and portal plasty. These data suggest that a cirrhotic, swollen, artery-dominant liver did not increase graft size-related risks despite the surgical complexity of preceding operations. The NCS group’s poorer survival originated from recurrence of the primary disease and liver manifestation of systemic disease untreatable by transplantation. Improving the survival of pediatric recipients requires intensive efforts to prevent primary disease relapse and more rapid diagnoses to exclude contraindications from NCS disease. |
| Keywords | liver transplantation living donor pediatrics prognostic factor cholestatic disease |
| Amo Type | Original Article |
| Publication Title | Acta Medica Okayama |
| Published Date | 2018-12 |
| Volume | volume72 |
| Issue | issue6 |
| Publisher | Okayama University Medical School |
| Start Page | 567 |
| End Page | 576 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | English |
| Copyright Holders | CopyrightⒸ 2018 by Okayama University Medical School |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 30573911 |
| NAID | 120006545159 |
| JaLCDOI | 10.18926/AMO/56373 |
|---|---|
| FullText URL | 72_6_563.pdf |
| Author | Katayama, Yoshimi| Senda, Masuo| Kaneda, Daisuke| Ozaki, Toshifumi| |
| Abstract | We studied phrenic nerve conduction times in 90 phrenic nerves of 45 normal subjects. The phrenic nerve was stimulated at the posterior border of the sternomastoid muscle in the supraclavicular fossa, just above the clavicle, with bipolar surface electrodes. For recording, positive and negative electrodes were placed on the xiphoid process and at the eighth intercostal bone-cartilage transition, respectively. We studied both the right and left sides to determine whether there was any difference between the two sides. The mean onset latency (± SD) of the right compound muscle action potentials (CMAPs) (5.99±0.39 msec) was significantly shorter than that of the left CMAPs (6.45±0.50 msec). The mean peak latency was significantly shorter in the right CMAPs (10.22±1.33 msec) than the left CMAPs (12.48±2.02 msec). The mean (± SD) amplitude was significantly lower in the left CMAPs (0.42±0.11 mV) than the right CMAPs (0.49±0.10 mV). The difference between the length of the nerve on the right and left sides might have affected the difference in latency between the two sides. |
| Keywords | phrenic nerve right left difference healthy subject nerve conduction |
| Amo Type | Original Article |
| Publication Title | Acta Medica Okayama |
| Published Date | 2018-12 |
| Volume | volume72 |
| Issue | issue6 |
| Publisher | Okayama University Medical School |
| Start Page | 563 |
| End Page | 566 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | English |
| Copyright Holders | CopyrightⒸ 2018 by Okayama University Medical School |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 30573910 |
| NAID | 120006545158 |
| JaLCDOI | 10.18926/AMO/56372 |
|---|---|
| FullText URL | 72_6_553.pdf |
| Author | Omura, Daisuke| Sato, Asuka| Oka, Kosuke| Hanayama, Yoshihisa| Ogawa, Hiroko| Obika, Mikako| Otsuka, Fumio| |
| Abstract | To clarify potential relationships between chief complaints of patients and laboratory data with a focus on aging-related changes, we retrospectively analyzed the data of 843 patients who visited a general medicine department for the first time. Their chief complaints were classified into 8 major symptoms: visceral pain, somatic pain, fever, cough, dizziness, fatigue, appetite loss, and edema. We compared the laboratory data obtained from the patients with complaints with the data of symptom-free (control) patients. The serum sodium and potassium levels in the fever group were decreased compared to those in the control group. In the fever group, the serum sodium level was inversely correlated with age. The ratio of serum urea nitrogen to creatinine (UN/Cr) was increased in the appetite-loss group. There were significant age-dependent increases in the UN/Cr ratio in the appetite-loss and edema groups. Of note, serum levels of free thyroxin were lower in the dizziness group compared to the control group. In addition, the free thyroxin level was inversely correlated with age in the dizziness group but not in the asymptomatic control group. Collectively, the results indicated that osmolality-related laboratory data are strongly associated with individual primary symptoms at the first visit regardless of the final diagnosis. The consideration of age-dependent changes of these markers is helpful for diagnosing latent disorders based on various primary symptoms. |
| Keywords | dizziness fever osmolality serum sodium thyroid dysfunction |
| Amo Type | Original Article |
| Publication Title | Acta Medica Okayama |
| Published Date | 2018-12 |
| Volume | volume72 |
| Issue | issue6 |
| Publisher | Okayama University Medical School |
| Start Page | 553 |
| End Page | 562 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | English |
| Copyright Holders | CopyrightⒸ 2018 by Okayama University Medical School |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 30573909 |
| NAID | 120006545157 |
| JaLCDOI | 10.18926/AMO/56371 |
|---|---|
| FullText URL | 72_6_547.pdf |
| Author | Watanabe, Akihisa| Ono, Qana| Nishigami, Tomohiko| Hirooka, Takahiko| Machida, Hirohisa| |
| Abstract | Distinct anatomic variants of the scapula such as the critical shoulder angle (CSA) were found to be associated with rotator cuff tears (RCTs), but it is unclear whether the CSA is a risk factor in Japanese. Here we sought to determine whether the CSA is associated with RCTs in a Japanese population, and whether the CSA is a more useful parameter than the conventionally used parameters. Our RCT group and non-RCT group each consisted of 54 consecutive cases. We compared the groups’ values of CSA, the acromion index (AI), and the lateral acromion angle (LAA) obtained by X-ray imaging. Receiver operating characteristic (ROC) analyses were performed to determine cutoff values and the area under the curve (AUC), and to assess the odds ratio. The means of the CSA and the AI in the RCT group were significantly larger (36.3° vs. 33.7°, 0.74 vs 0.68), but the LAA did not show a significant between-group difference. The AUCs for the CSA and AI were 0.678 and 0.658, the cutoff values were 35.0° and 0.72, and the odds ratios were 3.1 and 2.5, respectively. In conclusion, the CSA was a strong risk factor compared to the AI and LAA for rotator cuff tears. |
| Keywords | rotator cuff tear risk factor critical shoulder angle acromion index lateral acromion angle |
| Amo Type | Original Article |
| Publication Title | Acta Medica Okayama |
| Published Date | 2018-12 |
| Volume | volume72 |
| Issue | issue6 |
| Publisher | Okayama University Medical School |
| Start Page | 547 |
| End Page | 551 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | English |
| Copyright Holders | CopyrightⒸ 2018 by Okayama University Medical School |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 30573908 |
| NAID | 120006545156 |
| JaLCDOI | 10.18926/AMO/56370 |
|---|---|
| FullText URL | 72_6_539.pdf |
| Author | Hiraki, Takao| Kamegawa, Tetsushi| Matsuno, Takayuki| Komaki, Toshiyuki| Sakurai, Jun| Kanazawa, Susumu| |
| Abstract | Since 2012, we have been developing a remote-controlled robotic system (Zerobot®) for needle insertion during computed tomography (CT)-guided interventional procedures, such as ablation, biopsy, and drainage. The system was designed via a collaboration between the medical and engineering departments at Okayama University, including various risk control features. It consists of a robot with 6 degrees of freedom that is manipulated using an operation interface to perform needle insertions under CT-guidance. The procedure includes robot positioning, needle targeting, and needle insertion. Phantom experiments have indicated that robotic insertion is equivalent in accuracy to manual insertion, without physician radiation exposure. Animal experiments have revealed that robotic insertion of biopsy introducer needles and various ablation needles is safe and accurate in vivo. The first in vivo human trial, therefore, began in April 2018. After its completion, a larger clinical study will be conducted for commercialization of the robot. This robotic procedure has many potential advantages over a manual procedure: 1) decreased physician fatigue; 2) stable and accurate needle posture without tremor; 3) procedure automation; 4) less experience required for proficiency in needle insertion skills; 5) decreased variance in technical skills among physicians; and 6) increased likelihood of performing the procedure at remote hospitals (i.e., telemedicine). |
| Keywords | robot needle insertion CT-guided interventional radiology |
| Amo Type | Review |
| Publication Title | Acta Medica Okayama |
| Published Date | 2018-12 |
| Volume | volume72 |
| Issue | issue6 |
| Publisher | Okayama University Medical School |
| Start Page | 539 |
| End Page | 546 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | English |
| Copyright Holders | CopyrightⒸ 2018 by Okayama University Medical School |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 30573907 |
| NAID | 120006545155 |
| JaLCDOI | 10.18926/AMO/56254 |
|---|---|
| FullText URL | 72_5_535.pdf |
| Author | Sato, Daisuke| Gohda, Tomohito| Kihara, Masao| Kanaguchi, Yasuhiko| Kobayashi, Takashi| Mano, Satoshi| Sasaki, Yu| Nohara, Nao| Murakoshi, Maki| Nakata, Junichiro| Suzuki, Hitoshi| Ueda, Seiji| Horikoshi, Satoshi| Suzuki, Yusuke| |
| Abstract | Some patients with chronic kidney disease (CKD) receiving hemodialysis develop erythropoietin-resistant anemia, possibly due to zinc deficiency. The frequency of zinc deficiency in CKD (stages 1-5 and 5D) and CKD improvement via zinc supplementation are not completely verified. Here 500 CKD patients (Stage 1/2, n=100; Stage 3, n=100; Stage 4, n=100, Stage n=5, 100; Stage 5D, n=100) will be recruited to determine the frequency of serum zinc deficiency at each CKD stage. Patients with serum zinc concentrations <80 μg/dL will be treated with zinc acetate dihydrate (NobelzinR) to evaluate its effects on hypozincemia, taste disturbances, and anemia. |
| Keywords | zinc acetate dihydrate anemia chronic kidney disease |
| Amo Type | Clinical Study Protocol |
| Publication Title | Acta Medica Okayama |
| Published Date | 2018-10 |
| Volume | volume72 |
| Issue | issue5 |
| Publisher | Okayama University Medical School |
| Start Page | 535 |
| End Page | 538 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | English |
| Copyright Holders | CopyrightⒸ 2018 by Okayama University Medical School |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 30369613 |
| JaLCDOI | 10.18926/AMO/56253 |
|---|---|
| FullText URL | 72_5_531.pdf |
| Author | Kondo, Naoki| Fujisawa, Junichi| Arai, Katsumitsu| Kakutani, Rika| Endo, Naoto| |
| Abstract | A 60-year-old Japanese woman with severe osteoporosis presented with a history of right buttock pain and right lateral lower leg pain in an L5 distribution. She had been treated with methotrexate and methylprednisolone for rheumatoid arthritis (RA) and interstitial pneumonia. Computed tomography demonstrated a sacral stress fracture in the right sacral ala. The right L5 nerve root was compressed by the fracture site. This case is rare in that L5 radiculopathy was complicated by a sacral stress fracture. Clinicians should suspect sacral stress fractures when RA or osteoporosis is present in women who experiences lumbar pain and lumbar radiculopathy. |
| Keywords | lumbar 5 radiculopathy sacral stress fracture osteoporosis rheumatoid arthritis |
| Amo Type | Case Report |
| Publication Title | Acta Medica Okayama |
| Published Date | 2018-10 |
| Volume | volume72 |
| Issue | issue5 |
| Publisher | Okayama University Medical School |
| Start Page | 531 |
| End Page | 534 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | English |
| Copyright Holders | CopyrightⒸ 2018 by Okayama University Medical School |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 30369612 |
| JaLCDOI | 10.18926/AMO/56252 |
|---|---|
| FullText URL | 72_5_525.pdf |
| Author | Kakutani, Rika| Kondo, Naoki| Mochizuki, Tomoharu| Fujisawa, Junichi| Endo, Naoto| |
| Abstract | The bilateral shoulder pain of an 81-year-old Japanese woman due to falls persisted despite celecoxib treatment, and plain X-rays later showed bilateral collapsed humeral heads. After ruling out osteoarthritis, infectious arthritis, crystal-induced arthritis, neuropathic arthropathy, and osteonecrosis, we diagnosed bilateral shoulder joint rapidly destructive arthrosis (RDA). Lumbar bone mineral density showed very low T-score (−4.1). Primary osteoporosis was observed. Histology of biopsied humeral head indicated the features of fracture healing process: callus formation and osteoclasts without empty lacunae. Her history thus included an insufficiency fracture due to severe osteoporosis. Bilateral humeral head replacement was performed; her shoulder joint function improved. This case is extremely rare in that RDA was caused by simultaneous bilateral shoulder joint collapse within a very short time, with minimal or low mechanical stress and severe osteoporosis. |
| Keywords | rapidly destructive arthrosis differential diagnosis humeral head replacement osteoporosis shoulder joint |
| Amo Type | Case Report |
| Publication Title | Acta Medica Okayama |
| Published Date | 2018-10 |
| Volume | volume72 |
| Issue | issue5 |
| Publisher | Okayama University Medical School |
| Start Page | 525 |
| End Page | 530 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | English |
| Copyright Holders | CopyrightⒸ 2018 by Okayama University Medical School |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 30369611 |
| JaLCDOI | 10.18926/AMO/56251 |
|---|---|
| FullText URL | 72_5_519.pdf |
| Author | Miyahara, Hiroyuki| Tokumasu, Hironobu| Chin, Masaki| Waki, Kenji| Arakaki, Yoshio| |
| Abstract | Cases of recurrent meningitis in elderly patients with a spontaneous cerebrospinal fistula have been reported, and in some of these patients, cystic lesions were thought to be the underlying cause. We report a case of recurrent meningitis in an 11-year-old Japanese girl with an arachnoid cyst in the petrous apex. Pulsation of the cystic lesion was thought to cause bone erosion, leading to the formation of a fistula. Magnetic resonance imaging was useful in evaluating the arachnoid cyst and fistula. During 2 years of follow-up, the osteolytic lesion enlarged and the rate of bone erosion was higher than expected. |
| Keywords | magnetic resonance imaging pulsation of cystic lesion bone erosion fistula |
| Amo Type | Case Report |
| Publication Title | Acta Medica Okayama |
| Published Date | 2018-10 |
| Volume | volume72 |
| Issue | issue5 |
| Publisher | Okayama University Medical School |
| Start Page | 519 |
| End Page | 523 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | English |
| Copyright Holders | CopyrightⒸ 2018 by Okayama University Medical School |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 30369610 |
| JaLCDOI | 10.18926/AMO/56250 |
|---|---|
| FullText URL | 72_5_515.pdf |
| Author | Kanamitsu, Kiichiro| Chayama, Kousuke| Washio, Kana| Yoshida, Ryuichi| Umeda, Yuzo| Yagi, Takahito| Shimada, Akira| |
| Abstract | Hepatitis-associated aplastic anemia (HAAA) is an acquired bone marrow failure syndrome that develops after seronegative fulminant hepatitis. Abnormal cytotoxic T-cell activation with cytokine release is a possible pathophysiology. We present the case of a 16-month-old Japanese male who developed HAAA following living-donor liver transplantation for fulminant hepatitis. His aplastic anemia was successfully treated with immunosuppressive therapy. He had been administered tacrolimus for prophylaxis against hepatic allograft rejection. Ten years after the HAAA onset, the patient’s bone marrow was found to be slightly hypoplastic. Tacrolimus may be effective in controlling abnormal immune reactions that can cause recurrent impaired hematopoiesis. |
| Keywords | hepatitis-associated aplastic anemia impaired hematopoiesis liver transplantation immunosuppressive therapy abnormal immune reaction |
| Amo Type | Case Report |
| Publication Title | Acta Medica Okayama |
| Published Date | 2018-10 |
| Volume | volume72 |
| Issue | issue5 |
| Publisher | Okayama University Medical School |
| Start Page | 515 |
| End Page | 518 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | English |
| Copyright Holders | CopyrightⒸ 2018 by Okayama University Medical School |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 30369609 |
| JaLCDOI | 10.18926/AMO/56249 |
|---|---|
| FullText URL | 72_5_507.pdf |
| Author | Ogata, Takeshi| Katsui, Kuniaki| Yoshio, Kotaro| Ihara, Hiroki| Katayama, Norihisa| Soh, Junichi| Kuroda, Masahiro| Kiura, Katsuyuki| Maeda, Yoshinobu| Toyooka, Shinichi| Kanazawa, Susumu| |
| Abstract | To clarify the relationship between dose-volume histogram (DVH) parameters and radiation pneumonitis (RP) after surgery in cases of non-small cell lung cancer (NSCLC) treated with induction concurrent chemoradiotherapy (CCRT). Patients with NSCLC treated with induction CCRT (chemotherapy: cisplatin and docetaxel; radiotherapy: 2.0 Gy fractions once daily for a total of 46 Gy) before surgery were reviewed. We calculated the percentage of lung volume receiving at least 20 Gy (V20) and the mean lung dose (MLD) for the total lung volume and the lung remaining after resection. Factors affecting the incidence of RP at grade 2 or higher (≥ G2 RP) were analyzed. Eighteen of 49 patients (37%) experienced ≥G2 RP. The V20 and MLD for the lung remaining after resection (V20r and MLDr) were significant predictors according to the multivariate analysis (p=0.007 and 0.041, respectively). The incidence of ≥G2 RP was 8% in patients with V20r<10%, and 13% in patients with MLDr<5.6 Gy, respectively. The optimal approach to reduce the rate of postoperative RP in patients with induction CCRT for NSCLC is to keep the V20r below 10% and/or the MLDr below 5.6 Gy in the radiotherapy planning. |
| Keywords | radiation pneumonitis V20 mean lung dose induction chemoradiotherapy non-small cell lung cancer |
| Amo Type | Original Article |
| Publication Title | Acta Medica Okayama |
| Published Date | 2018-10 |
| Volume | volume72 |
| Issue | issue5 |
| Publisher | Okayama University Medical School |
| Start Page | 507 |
| End Page | 513 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | English |
| Copyright Holders | CopyrightⒸ 2018 by Okayama University Medical School |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 30369608 |
| JaLCDOI | 10.18926/AMO/56248 |
|---|---|
| FullText URL | 72_5_499.pdf |
| Author | Kodama, Yuya| Furumatsu, Takayuki| Maehara, Ami| Ozaki, Toshifumi| |
| Abstract | Cell clusters, or groups of cells sharing a single chondron-like structure, are frequently found in degenerated areas of the osteoarthritic (OA) meniscus. However, little is known about these meniscal clusters in humans. The aim of our study was to determine the composition of the extracellular matrix deposition around cell clusters in human OA menisci. Twenty-six menisci were obtained through total knee arthroplasty from patients with OA knee joints. The specimens were subjected to safranin O staining and immunostaining for Sry-type HMG box 9 (SOX9), type II collagen, and aggrecan. Their signal density after staining was assessed using ImageJ software. Five regions of interest were analyzed within each tissue sample. The SOX9, type II collagen, and aggrecan densities were considerably higher in cluster areas than in intact superficial layers of the meniscus. In addition, a substantial difference was detected between cluster areas and degenerative areas without cell clusters. We demonstrated that cell clusters localized near fissures and clefts showed remarkable uniformity in menisci exposed to a broad range of injuries. In addition, the chondrogenic proteins SOX9, type II collagen, and aggrecan were highly expressed in these tissues. |
| Keywords | cell cluster meniscus osteoarthritis Sry-type HMG box 9 type II collagen |
| Amo Type | Original Article |
| Publication Title | Acta Medica Okayama |
| Published Date | 2018-10 |
| Volume | volume72 |
| Issue | issue5 |
| Publisher | Okayama University Medical School |
| Start Page | 499 |
| End Page | 506 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | English |
| Copyright Holders | CopyrightⒸ 2018 by Okayama University Medical School |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 30369607 |
| JaLCDOI | 10.18926/AMO/56247 |
|---|---|
| FullText URL | 72_5_493.pdf |
| Author | Okazaki, Yuki| Furumatsu, Takayuki| Masuda, Shin| Miyazawa, Shinichi| Kodama, Yuya| Kamatsuki, Yusuke| Hino, Tomohito| Okazaki, Yoshiki| Ozaki, Toshifumi| |
| Abstract | Medial meniscus (MM) posterior root tear (PRT) results in joint overloading and degenerative changes in the knee. MM root repair is recommended to prevent subsequent cartilage degeneration following MMPRT. Favorable clinical outcomes have been reported after transtibial pullout repair of MMPRT. However, it is unclear whether pullout repair can cause compositional change in the MM posterior segment. We examined this question in 14 patients who underwent MMPRT pullout repair. Magnetic resonance imaging examinations were performed preoperatively and 3 months postoperatively at 10° knee flexion. The region-of-interest was marked along the MM posterior segment edge. Intra-meniscal signal intensity (IMSI) was expressed as the signal intensity ratio of the repaired MM to the intact lateral meniscus, which was used as a control. MMPRT pullout repair reduced IMSI from 1 to 0.915±0.096 (range, 0.760-1.074) 3 months postoperatively (p=0.006, power=0.90). Meniscal degeneration causes high proton density-weighted imaging signal intensity of the meniscal body. In our study, MMPRT pullout repair reduced IMSI contrary to other tears. This technique may decrease the MM posterior segment signal intensity by restoring the hoop tension mechanism. Measuring IMSI may be useful to assess the effect of MMPRT pullout repair on meniscal healing. |
| Keywords | medial meniscus posterior root tear magnetic resonance imaging signal intensity arthroscopic surgery |
| Amo Type | Original Article |
| Publication Title | Acta Medica Okayama |
| Published Date | 2018-10 |
| Volume | volume72 |
| Issue | issue5 |
| Publisher | Okayama University Medical School |
| Start Page | 493 |
| End Page | 498 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | English |
| Copyright Holders | CopyrightⒸ 2018 by Okayama University Medical School |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 30369606 |
| JaLCDOI | 10.18926/AMO/56246 |
|---|---|
| FullText URL | 72_5_487.pdf |
| Author | Hamasaki, Ichiro| Shibata, Kiyo| Shimizu, Takehiro| Morisawa, Shin| Toshima, Shinji| Miyata, Manabu| Furuse, Takashi| Hasebe, Satoshi| Ohtsuki, Hiroshi| Morizane, Yuki| Shiraga, Fumio| |
| Abstract | We investigated variances in the stability and amount of postoperative exodrift among age groups of intermittent exotropia (XPT) patients who underwent unilateral lateral rectus muscle recession and medial rectus muscle resection. We analyzed the cases of 110 consecutive patients who underwent the surgery in 2004-2011, dividing the patients into groups by their age at surgery: <10, 10-19, and ≥20 years. We performed a regression analysis (dependent variable: postoperative exodrift (°); independent variable: number of days post-surgery) using the formula of curve lines. When the tangent line slope was = 0.01 (°/days) for each group, we defined the numbers of days until alignment became stable as the ‘stable days.’ We evaluated the between-group differences in the amount of exodrift calculated for the stable days. The coefficients and coefficients of determination for the fitting curves were: <10 year group: f(x)=12.2 (1−e−0.0183x) (r2=0.588, p<0.05); 10-19 year group: f(x)=10.0 (1−e−0.0178x) (r2=0.453, p<0.05); ≥20 year group: f(x)=3.40 (1−e−0.0382x) (r2=0.217, p<0.05). There were 389 , 388, and 153 stable days, and the estimated postoperative exodrift with long-term follow-up was 11.5±3.7°, 9.3±4.4°, and 4.1±3.6° for the < 10 year, 10-19 year, and ≥ 20 year groups, respectively (≥20 year vs. other 2 groups, p<0.05). Longer periods and more postoperative exodrift were associated with younger age at surgery. The postoperative evaluation was approx. ≥ 1 year post-surgery in patients aged < 20. These findings may contribute to evaluating XPT’s success rate and prognoses. |
| Keywords | intermittent exotropia postoperative exodrift recession resection procedure strabismus surgery |
| Amo Type | Original Article |
| Publication Title | Acta Medica Okayama |
| Published Date | 2018-10 |
| Volume | volume72 |
| Issue | issue5 |
| Publisher | Okayama University Medical School |
| Start Page | 487 |
| End Page | 492 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | English |
| Copyright Holders | CopyrightⒸ 2018 by Okayama University Medical School |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 30369605 |
| JaLCDOI | 10.18926/AMO/56245 |
|---|---|
| FullText URL | 72_5_479.pdf |
| Author | Tanaka, Ken-ichi| Yagi, Takao| Nanba, Takeshi| Asanuma, Masato| |
| Abstract | We tried to clarify the applicability of a single prolonged stress (SPS) protocol as post-traumatic stress disorder (PTSD) model in mice. To investigate PTSD pathophysiology, we conducted hypothalamo-pituitary-adrenal (HPA) negative feedback testing at 1, 4, 8 and 12 weeks after the SPS by administrating a dexamethasone (DEX) suppression test. The SPS induced over-suppression of the HPA system by DEX treatment at 8 and 12 weeks. To investigate PTSD-like behavioral characteristics, we subjected mice to testing in a light/dark box (to assess anxiety), a Y-maze (working memory), a cliff avoidance (visual cognition), and an open field (locomotor activity) at 1, 4, 8 and 12 weeks after the SPS. In the light/dark box test, the SPS-applied mice spent significantly less time in the light box at 8 or 12 weeks. In the cliff avoidance test, the SPS-applied mice spent significantly less time in the open area at 1 week. However, in both the Y-maze test and the open field test, SPS-applied mice tended toward slight decreases in a time-dependent manner until 12 weeks. Therefore, SPS-applied mice may thus be useful for assessing characteristics relevant to PTSD that coincide with changes in the HPA axis. |
| Keywords | PTSD single prolonged stress corticosterone mouse |
| Amo Type | Original Article |
| Publication Title | Acta Medica Okayama |
| Published Date | 2018-10 |
| Volume | volume72 |
| Issue | issue5 |
| Publisher | Okayama University Medical School |
| Start Page | 479 |
| End Page | 485 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | English |
| Copyright Holders | CopyrightⒸ 2018 by Okayama University Medical School |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 30369604 |
| JaLCDOI | 10.18926/AMO/56244 |
|---|---|
| FullText URL | 72_5_467_n.pdf |
| Author | Vika Fatafehi Hala’ufia Lemoto| Sugimoto, Kentaro| Kanazawa, Tomoyuki| Matsuzaki, Takashi| Morimatsu, Hiroshi| |
| Abstract | We investigated the incidence of desaturation during general anesthesia in preoperatively hypoxic (< 92%), and nonhypoxic (≥ 92%) pediatric (n=1,090) and adult (n=5,138) patients. We plotted the patients’ SpO2 value time-courses and assessed desaturation in 6,228 patients. The crude overall incidence (95%CI) for desaturation was 11.1% (9.4-13.1) in the pediatric patients and 0.9% (0.6-1.2) in the adults. The crude incidence of desaturation in the hypoxic pediatric patients was 2.5 times the risk in the nonhypoxic patients: risk ratio (RR) 2.5 (1.8-3.5), p<0.001. The risk of desaturation in the hypoxic adult patients was 20.1 times the risk in the nonhypoxic adult patients: RR 20.1 (10.3-39.2), p<0.001. When the patients were separately stratified by American Society of Anesthesiologists Physical Status (ASA-PS) and by age, the directly adjusted risk-ratio (RRS) showed that the hypoxic pediatric patients had 1.8 and 1.6 times the risk in the nonhypoxic pediatric patients: ASA-PS adjusted RRS 1.6 (1.8-2.2), p<0.001; age-adjusted RRS 1.8 (1.3-2.5), p<0.001, and the hypoxic adult patients had 13.8 times the risk in the nonhypoxic adult patients: RRS 13.8 (6.9-27.6), p<0.001. A pulse-oximeter check before the start of general anesthesia could ensure timely preparation to avoid intraoperative desaturation. |
| Keywords | desaturation incidence pulse oximetry general anesthesia adult pediatric |
| Amo Type | Original Article |
| Publication Title | Acta Medica Okayama |
| Published Date | 2018-10 |
| Volume | volume72 |
| Issue | issue5 |
| Publisher | Okayama University Medical School |
| Start Page | 467 |
| End Page | 478 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | English |
| Copyright Holders | CopyrightⒸ 2018 by Okayama University Medical School |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 30369603 |
| JaLCDOI | 10.18926/AMO/56243 |
|---|---|
| FullText URL | 72_5_457.pdf |
| Author | Muto, Noriko| Matsuoka, Yoshikazu| Arakawa, Kyosuke| Kurita, Masako| Omiya, Hiroki| Taniguchi, Arata| Kaku, Ryuji| Morimatsu, Hiroshi| |
| Abstract | Quercetin is a flavonoid widely found in plants and marketed to the public as a supplement. Several studies have reported its effect on glial cells. This study aimed to examine the effect of quercetin on the development of neuropathic pain and the underlying mechanism in a spared nerve injury (SNI) rat model. Male Sprague-Dawley rats randomly assigned to the control or the quercetin group were subjected to SNI of the sciatic nerve. We measured pain behaviors on the hind paw and glial fibrillary acidic protein (GFAP) in the dorsal root ganglion (DRG) and spinal cord. Oral administration of 1% quercetin, begun before surgery, attenuated mechanical allodynia compared to the control group at days 7 and 10 after SNI. On the other hand, established pain was not attenuated in a post-dose group in which quercetin was begun 7 days after SNI. Quercetin inhibited GFAP in the satellite glial cells of the ipsilateral L5 DRG on day 7 compared to the control group. Quercetin suppressed the development of neuropathic pain through a mechanism partly involving the inhibition of satellite glial cells. As its safety is well established, quercetin has great potential for clinical use in pain treatment. |
| Keywords | flavonoid dorsal root ganglion glial fibrillary acidic protein alternative medicine |
| Amo Type | Original Article |
| Publication Title | Acta Medica Okayama |
| Published Date | 2018-10 |
| Volume | volume72 |
| Issue | issue5 |
| Publisher | Okayama University Medical School |
| Start Page | 457 |
| End Page | 465 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | English |
| Copyright Holders | CopyrightⒸ 2018 by Okayama University Medical School |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 30369602 |
| JaLCDOI | 10.18926/AMO/56242 |
|---|---|
| FullText URL | 72_5_447.pdf |
| Author | Oka, Kosuke| Hanayama, Yoshihisa| Sato, Asuka| Omura, Daisuke| Yasuda, Miho| Hasegawa, Ko| Obika, Mikako| Otsuka, Fumio| |
| Abstract | We retrospectively analyzed the cases of 148 febrile patients whose body temperature (BT) was ≥ 37.5°C at our hospital. We categorized them into seven groups; those with bacterial and viral infection, nonspecific inflammation, neoplasm, connective tissue disease (CTD), drug-induced disease, and unidentified causes. Our analysis revealed that the patient’s BT at the 1st visit (BT-1st visit) and highest BT during the febrile period (BT-max) differed significantly among all categories except neoplasm. The greatest difference between BT-1st visit and BT-max was highest in the CTD group (1.5°C). Positive correlations of heart rate and C-reactive protein (CRP) level with BT-max and a negative correlation between serum sodium level with BT-max were uncovered. The serum thyroid-stimulating hormone (TSH) level and the ratio of TSH/free thyroxine were negatively correlated with BT-max, especially in the viral infection group, suggesting the existence of occult thyrotoxicosis in accord with a febrile condition, possibly leading to febrile tachycardia. A febrile gap between BT-1st visit and BT-max (except in the neoplasm group) was shown, in which BT-max was correlated with thyroid function. Clinicians should recognize the fluctuation of BT when diagnosing febrile patients, and tachycardia in such febrile patients may be, at least in part, associated with subclinical thyroid dysfunction. |
| Keywords | body temperature C-reactive protein fever of unknown origin tachycardia thyroid dysfunction |
| Amo Type | Original Article |
| Publication Title | Acta Medica Okayama |
| Published Date | 2018-10 |
| Volume | volume72 |
| Issue | issue5 |
| Publisher | Okayama University Medical School |
| Start Page | 447 |
| End Page | 456 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | English |
| Copyright Holders | CopyrightⒸ 2018 by Okayama University Medical School |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 30369601 |
