{"title":"Impact of surgeon experience on the effectiveness of patient-specific instrumentation in reverse shoulder arthroplasty.","authors":"Jun Kawamata, Shoji Fukuta, Daisuke Nakai, Masashi Kano, Katsutoshi Miyatake, Koichi Sairyo","doi":"10.2152/jmi.73.217","DOIUrl":"10.2152/jmi.73.217","url":null,"abstract":"<p><p>Scapular models were created based on preoperative computed tomography images obtained for 8 cases of cuff tear arthropathy that underwent reverse shoulder arthroplasty (RSA). Four surgeons performed baseplate implantation:A, a shoulder surgeon with experience of more than 200 RSA cases;B, an arthroscopic shoulder surgeon with experience of fewer than 10 RSA cases;C, an orthopedic fellow;and D, an orthopedic resident. Implantation was performed using the conventional method and using patient-specific instrumentation (PSI). Overall, the mean ΔInc was 9.1° using the conventional method and 3.7° using PSI;the respective mean ΔVer were 3.7° and 3.2°. Using the conventional method, there were statistically significant inter-surgeon differences in ΔInc (p=0.038) but not in ΔVer (p=0.77). Using the PSI method, there was no significant inter-surgeon difference in ΔInc (p=0.89) or ΔVer (p=0.23). There was a statistically significant intra-surgeon difference in ΔInc for surgeons B and C (B, p<0.001;C, p=.007) but not in ΔVer for any of the surgeons. PSI ensured the accuracy of baseplate implantation in RSA regardless of a certain amount of surgeon's experience. Implantation accuracy was more impacted when the surgeon was less experienced. J. Med. Invest. 73 : 217-221, February, 2026.</p>","PeriodicalId":46910,"journal":{"name":"JOURNAL OF MEDICAL INVESTIGATION","volume":"73 1.2","pages":"217-221"},"PeriodicalIF":0.9,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147785262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"AceScope<sup>TM</sup> monitor program revision does not facilitate tracheal intubation in novice physicians:A manikin simulation study.","authors":"Atsushi Kobayashi, Shingo Kawashima, Tetsuro Kimura, Shin Suzuki, Satoko Yokoyama, Masahiko Ohashi, Hiroyuki Kinoshita","doi":"10.2152/jmi.73.32","DOIUrl":"10.2152/jmi.73.32","url":null,"abstract":"<p><p>Whether the difference in video laryngoscope view affects the success of endotracheal intubation in beginners is unknown. In the current study, we aimed to investigate whether the revision of the monitor program in a Macintosh-type video laryngoscope, AceScopeTM, enhances the endotracheal tube intubation skill in novice physicians. Participants with no experience performing tracheal intubation were assigned to the pre- (n=15) and post-program revision (n=16) groups. Each participant performed tracheal intubation twice using the assigned version of the AceScopeTM video laryngoscope on an immobilized airway setting in the manikin. We assessed the intubation success rate, intubation time, frequency of dental injury, numerical rating scale (NRS) of easiness, and the Cormack & Lehane (CL) classification. The intubation success rate did not differ between the pre-program revision (93%) and post-program revision (100%) groups. The median intubation times were not different between pre- (39 seconds) and post- (31 seconds) groups. The frequency of dental injury, the NRS of easiness, and the CL classification were similar between the two groups. The program revision of the AceScopeTM video laryngoscope did not alter the intubation success rate and median intubation time in novice physicians. Improving the video laryngoscope's monitor view does not enhance solely beginners' intubation conditions. J. Med. Invest. 73 : 32-35, February, 2026.</p>","PeriodicalId":46910,"journal":{"name":"JOURNAL OF MEDICAL INVESTIGATION","volume":"73 1.2","pages":"32-35"},"PeriodicalIF":0.9,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147785451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The role of postoperative ultrasonography in the early detection of renal artery pseudoaneurysms after robot-assisted partial nephrectomy.","authors":"Rikizo Matsumoto, Kei Daizumoto, Keisuke Ozaki, Asami Yuasa, Susumu Nishio, Kunihisa Yamaguchi, Masayuki Takahashi, Hisanori Uehara, Takayoshi Shinya, Hiroomi Kanayama, Junya Furukawa","doi":"10.2152/jmi.73.106","DOIUrl":"10.2152/jmi.73.106","url":null,"abstract":"<p><strong>Introduction: </strong>The presence of renal artery pseudoaneurysms, a complication after robot-assisted partial nephrectomy, was evaluated by abdominal ultrasonography. The incidence of renal artery pseudoaneurysms detected by abdominal ultrasonography and the usefulness of abdominal ultrasonography for evaluation after partial nephrectomy were also examined.</p><p><strong>Methods: </strong>A total of 73 patients who underwent robot-assisted partial nephrectomy between September 2020 and June 2023 and who underwent abdominal ultrasonography on postoperative day 7 to screen for renal pseudoaneurysms were retrospectively reviewed.</p><p><strong>Results: </strong>Ultrasonography after partial nephrectomy showed the presence of renal artery pseudoaneurysms in 3 of 73 patients (4.1%). One of the patients with a renal artery pseudoaneurysm was diagnosed with a large, 15-mm renal artery pseudoaneurysm on postoperative day 7, followed by hematuria with blood clot on postoperative day 10, but the bleeding was stopped by vascular embolization, and the patient had a good course. Two other patients were diagnosed with 20-mm and 16-mm renal artery pseudoaneurysms on postoperative day 7;they were carefully monitored, and the pseudoaneurysms disappeared and regressed by CT or ultrasonography. One of the 73 patients in this study had an intravesical hemorrhage on the 8th postoperative day and underwent emergency embolization. The results of this study showed that renal artery pseudoaneurysms as small as 15 mm in diameter can be identified.</p><p><strong>Conclusion: </strong>The present results suggest that screening ultrasonography is useful in identifying renal pseudoaneurysms in the early postoperative period after partial nephrectomy. J. Med. Invest. 73 : 106-110, February, 2026.</p>","PeriodicalId":46910,"journal":{"name":"JOURNAL OF MEDICAL INVESTIGATION","volume":"73 1.2","pages":"106-110"},"PeriodicalIF":0.9,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147785508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Transforaminal Full-Endoscopic Surgery for a Juxta-Facet Cyst Under Local Anesthesia:A 2.5-Year Follow-Up of Ligamentum Flavum Repair-A Case Report.","authors":"Duong Le Minh, Masatoshi Morimoto, Takayuki Kitahara, Takafumi Ohshima, Yuji Nagao, Naoto Ono, Saori Soeda, Kosuke Sugiura, Hiroaki Manabe, Fumitake Tezuka, Kazuta Yamashita, Koichi Sairyo","doi":"10.2152/jmi.73.88","DOIUrl":"10.2152/jmi.73.88","url":null,"abstract":"<p><p>A juxta facet cyst is a relatively uncommon disease that is usually treated by cyst removal and nerve decompression surgery. Nowadays, these cysts can be removed by endoscopic surgery, which is minimally invasive and allows rapid recovery. In this report, we present a 60-year-old man with a left-sided juxta facet cyst at L4 / 5 who underwent transforaminal full-endoscopic cyst removal and left L5 nerve root decompression under local anesthesia. The surgery was performed via an 8-mm incision while the patient was awake and there were no complications. The patient's leg pain score decreased to 1 / 10 postoperatively and he returned to work 2 weeks after the surgery. There has been no recurrence during 2.5 years of follow-up. Interestingly, the ligamentum flavum repair has been observed in the time since the surgery. We believe that transforaminal full-endoscopic surgery under local anesthesia is the least invasive surgery for juxta facet cysts. J. Med. Invest. 73 : 88-91, February, 2026.</p>","PeriodicalId":46910,"journal":{"name":"JOURNAL OF MEDICAL INVESTIGATION","volume":"73 1.2","pages":"88-91"},"PeriodicalIF":0.9,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147785515","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effect of glucose load on metabolism in patients with type 2 diabetes during elective surgery using remifentanil-induced anesthesia:a randomized controlled trial.","authors":"Asuka Kasai, Kohei Fukuta, Noriko Kambe, Ryosuke Kawanishi, Nami Kakuta, Katsuya Tanaka","doi":"10.2152/jmi.73.222","DOIUrl":"10.2152/jmi.73.222","url":null,"abstract":"<p><p>This study aimed to explore the effect of intraoperative glucose load on metabolism in patients with type 2 diabetes anesthetized with remifentanil. A total of 30 patients were enrolled and randomly allocated to one of two groups:no glucose or low-dose glucose (0.1 g/kg/h for 1 hour followed by 0.05 g/kg/h for 1 hour). Glucose, adrenocorticotropic hormone, 3-methylhistidine, insulin, cortisol, free fatty acid, ketone bodies, and creatinine were measured at several points before, during, and after general anesthesia. Glucose levels in the low-dose glucose group increased significantly at 1 and 2 hours after glucose infusion compared to their preanesthetic levels and to those in the no glucose group. Two patients in the low-dose glucose group had blood glucose levels exceeding 11.1 mmol/L. Free fatty acids, ketone bodies, and 3-methylhistidine/creatinine did not differ significantly between groups. Ketone body levels were significantly higher at 1 hour than preanesthetic levels in both groups;after 1 hour, however, they did not change in the no glucose group but significantly decreased in the low-dose glucose group. Intraoperative low-dose glucose load may suppress ketogenesis, but clinicians must consider the risk of causing hyperglycemia in patients with type 2 diabetes undergoing remifentanil-induced anesthesia. J. Med. Invest. 73 : 222-228, February, 2026.</p>","PeriodicalId":46910,"journal":{"name":"JOURNAL OF MEDICAL INVESTIGATION","volume":"73 1.2","pages":"222-228"},"PeriodicalIF":0.9,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147785396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Toshiya Akiyama, Ryuichi Tanioka, Hirokazu Ito, Krishan Soriano, Leah Anne Bollos, Allan Paulo Blaquera, Kyoko Osaka, Hidehiro Umehara, Reiko Kamoi, Yoshihiro Mifune, Rick Yiu Cho Kwan, Anson Chui Yan Tang, Kazushi Mifune, Tetsuya Tanioka
{"title":"Key Biomarkers and Physical Performance Indicators Associated with Pre-Frailty and Frailty in Patients with Chronic Schizophrenia aged < 65 years.","authors":"Toshiya Akiyama, Ryuichi Tanioka, Hirokazu Ito, Krishan Soriano, Leah Anne Bollos, Allan Paulo Blaquera, Kyoko Osaka, Hidehiro Umehara, Reiko Kamoi, Yoshihiro Mifune, Rick Yiu Cho Kwan, Anson Chui Yan Tang, Kazushi Mifune, Tetsuya Tanioka","doi":"10.2152/jmi.73.12","DOIUrl":"10.2152/jmi.73.12","url":null,"abstract":"<p><p>Patients with schizophrenia have a higher risk of early death, an average life expectancy 10-25 years lesser, and higher risk of frailty than the general population. This study aimed to determine the relationship between A Body Shape Index (ABSI), body mass index (BMI), chlorpromazine (CP) equivalent dose, and blood urea nitrogen to creatinine (BUN / Cr) ratio in hospitalized patients with chronic schizophrenia, with pre-frailty / frailty, and age < 65 years. The Shapiro-Wilk test was used to analyze normality. Non-parametric methods were used for analysis. The study included 67 of 175 patients with chronic schizophrenia who were hospitalized and eligible for inclusion. Sixty-one patients were diagnosed with pre-frailty or frailty. Among the participants, 68.9% were pre-frailty, 31.1% were frailty, and 63.9% were at high mortality risk. Walking speed was significantly less in patients with frailty, highlighting its role in frailty assessment. The ABSI z-score was negatively correlated with grip strength, thereby linking abdominal obesity to muscle weakness. The BUN / Cr ratio was also correlated with grip strength, walking speed, and BMI, suggesting metabolic influences on frailty. Frailty in patients with schizophrenia often occurs at a younger age in patients with schizophrenia than in the general population, and routine assessment of ABSI z-score and BUN/Cr levels could offer valuable prognostic information. J. Med. Invest. 73 : 12-20, February, 2026.</p>","PeriodicalId":46910,"journal":{"name":"JOURNAL OF MEDICAL INVESTIGATION","volume":"73 1.2","pages":"12-20"},"PeriodicalIF":0.9,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147785343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Intraoperative identification of parathyroid with 4K 3D ORBEYE®︎ exoscope in thyroid surgery.","authors":"Asami Kageyama, Seiichiro Kamimura, Ayaka Yamamoto, Sho Takaoka, Miki Tomura, Eiji Kondo, Takahiro Azuma, Go Sato, Yoshiaki Kitamura","doi":"10.2152/jmi.73.208","DOIUrl":"10.2152/jmi.73.208","url":null,"abstract":"<p><p>Preservation of the parathyroid glands during thyroid surgery is important to preserve postoperative parathyroid function. However, macroscopic identification of the parathyroid glands in the surgical field is difficult because normal parathyroid glands are small and resemble lymph nodes or fat tissues. Recently, the detection of the parathyroids using near-infrared imaging has been reported. In this study, we applied ORBEYE, a three-dimensional surgical exoscope system, to four cases of thyroidectomy and examined whether the near-infrared mode of ORBEYE is useful for the intraoperative identification of the parathyroid glands. We demonstrated that the ORBEYE can be an effective surgical instrument in thyroid surgery, and it is necessary to accumulate more cases and examine the usefulness of this method in the future. J. Med. Invest. 73 : 208-211, February, 2026.</p>","PeriodicalId":46910,"journal":{"name":"JOURNAL OF MEDICAL INVESTIGATION","volume":"73 1.2","pages":"208-211"},"PeriodicalIF":0.9,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147785315","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yoshiko Matsuda, Yoshie Imai, Yuta Inoue, Yasushi Takagi, Kenji Shimada
{"title":"Relationship between Constipation and Cerebral Vasospasm after Aneurysmal Rupture and Bowel Control in Patients with Vasospasm:Findings from a Retrospective Study.","authors":"Yoshiko Matsuda, Yoshie Imai, Yuta Inoue, Yasushi Takagi, Kenji Shimada","doi":"10.2152/jmi.73.135","DOIUrl":"10.2152/jmi.73.135","url":null,"abstract":"<p><p>This study focused on bedside bowel movement-related information obtained during days 0 to 14 after the onset of subarachnoid hemorrhage (SAH) due to cerebral aneurysmal rupture, with the aim of examining its potential as a monitoring index for predicting vasospasm onset. This retrospective study covered April 2013 to December 2022. Data collected included age, sex, Hunt and Hess grade, and whether and how radical aneurysm treatment was performed, and patient characteristics were compared between those with and without vasospasm. Among 170 participants, no significant differences were observed in factors related to the gut-brain axis according to the presence of vasospasm. Subsequent descriptive analysis of vasospasm cases during post-SAH days 0 to 14 revealed that patients generally experienced constipation postoperatively while bedridden and received laxatives or bowel-stimulating medications. These findings suggest impaired bowel motility and possible involvement of the gut-brain axis in vasospasm onset. Although no numerically significant differences were demonstrated, the present results indicate a potential relationship between vasospasm and the gut-brain axis, warranting further investigation. J. Med. Invest. 73 : 135-142, February, 2026.</p>","PeriodicalId":46910,"journal":{"name":"JOURNAL OF MEDICAL INVESTIGATION","volume":"73 1.2","pages":"135-142"},"PeriodicalIF":0.9,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147785439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Takeshi Soeki, Tomomi Matsuura, Tomoko Takahashi, Kazuki Tezuka, Masataka Sata
{"title":"New approaches to the diagnosis and treatment of atrial fibrillation.","authors":"Takeshi Soeki, Tomomi Matsuura, Tomoko Takahashi, Kazuki Tezuka, Masataka Sata","doi":"10.2152/jmi.73.1","DOIUrl":"10.2152/jmi.73.1","url":null,"abstract":"<p><p>Atrial fibrillation (AF) is a prevalent arrhythmia that exhibits an increased incidence with advancing age. AF has emerged as a critical public health concern due to its potential to precipitate cerebral infarction and heart failure. Therefore, it is imperative to implement preventive strategies for individuals at risk of AF, enable earlier diagnoses, and ensure reliable therapeutic interventions. Despite rapid advancements in diagnostic and therapeutic tools for AF, these remain insufficient. Recent studies have focused on developing diagnostic and therapeutic methodologies for AF, particularly regarding chronic inflammation. Clinical investigations have explored biomarkers of AF associated with various pathologies, including chronic inflammation, such as circulating pentraxin 3, microRNA, and fragmented cell-free DNA. Several studies have examined novel indicators that integrate conventional risk factors or the use of artificial intelligence to predict the onset of AF. We explore emerging therapeutic strategies for AF, focusing on the potential to inhibit its onset and progression by targeting factor Xa - protease-activated receptor-2 signaling. Additionally, we review the treatment of AF complicated by heart failure through catheter ablation, including the innovative technique of pulse field ablation. This review focuses on the advancement of innovative diagnostic and therapeutic strategies for AF through a multifaceted approach. J. Med. Invest. 73 : 1-11, February, 2026.</p>","PeriodicalId":46910,"journal":{"name":"JOURNAL OF MEDICAL INVESTIGATION","volume":"73 1.2","pages":"1-11"},"PeriodicalIF":0.9,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147785441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Competencies of nurses involved in preventing child abuse in hospital:a qualitative descriptive study.","authors":"Hiroko Hashimoto, Kumi Takahashi","doi":"10.2152/jmi.73.251","DOIUrl":"10.2152/jmi.73.251","url":null,"abstract":"<p><p>Nurses working in hospitals play important roles in preventing child abuse, detecting it early, and providing ongoing support, as they have many opportunities to interact with children and their parents. However, because of this, they feel that they lack competency and have difficulty in making decisions that prevent child abuse. This study aimed to clarify competencies of nurses involved in preventing child abuse. Data were collected by semi-structured interviews with 10 nurses who have been recommended by their supervisor or peers as having excellent skills in preventing child abuse in hospitals. The interviews were transcribed and analyzed qualitatively and descriptively. Nine categories were identified as competencies of nurses involved in preventing child abuse, including \"Be considerate of parents' feelings and build a trusting relationship with them\", \"Ensure the safety of children and check their mental and physical conditions\", \"Support for the parent and child who have concerns when the opportunity arises\", \"Collect information, and share and collaborate closely with various professions\", \"Strive to improve the current situation and professional development\". In order to enhance the practical skills of nurses involved in preventing child abuse in hospitals, in-service education is essential for helping them develop these competencies. J. Med. Invest. 73 : 251-256, February, 2026.</p>","PeriodicalId":46910,"journal":{"name":"JOURNAL OF MEDICAL INVESTIGATION","volume":"73 1.2","pages":"251-256"},"PeriodicalIF":0.9,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147785443","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}