A nationwide survey on clinical practice patterns and bleeding complications of percutaneous native kidney biopsy in Japan.

BACKGROUND: Practice patterns and bleeding complications of percutaneous native kidney biopsy (PNKB) have not recently been investigated and the Japanese Society of Nephrology performed a nationwide questionnaire survey in 2018. METHODS: The survey consisted of nine sections about PNKB: (1) general indications; (2) indications for high-risk patients; (3) informed consent; (4) pre-biopsy evaluation; (5) procedures; (6) sedation; (7) post-biopsy hemostasis, bed rest, and examinations; (8) bleeding complications; and (9) specimen processing. A supplementary survey examined bleeding requiring transcatheter arterial embolization (TAE). RESULTS: Overall, 220 directors of facilities (nephrology facility [NF], 168; pediatric nephrology facility [PF], 52) completed the survey. Indications, procedures, and monitoring protocols varied across facilities. Median lengths of hospital stay were 5 days in NFs and 6 days in PFs. Gauge 14, 16, 18 needles were used in 5%, 56%, 33% in NFs and 0%, 63%, 64% in PFs. Mean limits of needle passes were 5 in NFs and 4 in PFs. The bed rest period was 16-24 h in 60% of NFs and 65% of PFs. Based on 17,342 PNKBs, incidence rates of macroscopic hematuria, erythrocyte transfusion, and TAE were 3.1% (NF, 2.8%; PF, 6.2%), 0.7% (NF, 0.8%; PF, 0%), and 0.2% (NF, 0.2%; PF, 0.06%), respectively. Forty-six percent of facilities processed specimens all for light microscopy, immunofluorescence, and electron microscopy, and 21% processed for light microscopy only. Timing of bleeding requiring TAE varied among PNKB cases. CONCLUSION: Wide variations in practice patterns of PNKB existed among facilities, while PNKBs were performed as safely as previously reported.

Correction to: A nationwide survey on clinical practice patterns and bleeding complications of percutaneous native kidney biopsy in Japan.

In the original publication, some errors have been found in the alignment of Table 9. The corrected table is given below.

A cross-sectional nationwide survey of congenital and infantile nephrotic syndrome in Japan.

BACKGROUND: Congenital nephrotic syndrome (CNS) and infantile nephrotic syndrome (INS) cause substantial morbidity and mortality. In Japan, there is a lack of knowledge regarding the characteristics of CNS and INS. This study aimed to clarify the characteristics of CNS and INS in Japan. METHODS: This cross-sectional nationwide survey obtained data from 44 institutions in Japan managing 92 patients with CNS or INS, by means of two survey questionnaires sent by postal mail. Patients aged < 16 years by 1 April 2015, with a diagnosis of CNS or INS, were included in this study. The primary outcome was end-stage kidney disease. RESULTS: A total of 83 patients with CNS or INS were analyzed. The most frequent disease type was non-Finnish (60.2%); 33 patients (39.8%) had Finnish type. Among those with non-Finnish-type disease, 26 had no syndrome and 24 had a syndrome, of which the most frequent was Denys-Drash syndrome (70.8%). Patients with non-Finnish-type disease with syndrome showed the earliest progression to end-stage kidney disease compared with the other two groups, whereas patients with non-Finnish-type disease without syndrome progressed more slowly compared with the other two groups. In the Finnish-type group, the disease was diagnosed the earliest; a large placenta was reported more frequently; genetic testing was more frequently performed (93.8%); mental retardation was the most frequent extra-renal symptom (21.2%); and thrombosis and infection were more frequent compared with the other groups. Patients with non-Finnish-type disease with syndrome had a higher frequency of positive extra-renal symptoms (79.2%), the most common being urogenital symptoms (54.2%). Treatment with steroids and immunosuppressants was more frequent among patients with non-Finnish-type disease without syndrome. Two patients with non-Finnish-type disease without syndrome achieved complete remission. In all groups, unilateral nephrectomy was performed more often than bilateral nephrectomy and peritoneal dialysis was the most common renal replacement therapy. CONCLUSIONS: The present epidemiological survey sheds light on the characteristics of children with CNS and INS in Japan. A high proportion of patients underwent genetic examination, and patient management was in accord with current treatment recommendations and practices. TRIAL REGISTRATION: Not applicable.

[Pulmonary Epithelial Hemangioendothelioma Needed to Differentiate from Metastatic Lung Tumor;Report of a Case].

Pulmonary epithelioid hemangioendthelioma(PEH) is rare malignant disease known to originate from hemangioendthelial cells. We report a case of PEH that is difficult to differential diagnosis on image. A 55-year-old woman was diagnosed with malignant lymphoma 15 years ago and had been followed-up. She referred to our hospital due to abnormal shadow on chest X-ray. Multiple nodules of 0.2~1.0 cm in size with clear but irregular margin were found in bilateral lungs on chest computed tomography(CT) scan. Nodules were found to be increased both in size and in number compared to those of 10 years ago. Pulmonary metastases of lymphoma, lung cancer or granulomatous disease were suspected and a thoracoscopic lung biopsy was performed, which led to a diagnosis of PEH pathologically.

[Postoperative Superior Mesenteric Artery and Cerebral Infarction Possibly due to the Thrombus at the Left Superior Pulmonary Vein Stump].

Pulmonary vein stump thrombus (PVST) was thought to be a rare complication after lung resection. Several cases of embolism due to PVST were reported previously. However, in recent paper, PVST was reported to be found in 13.5% of patients after left upper lobectomy ( LUL). We experienced a case of PVST that induced acute embolism of the superior mesenteric artery at 2 weeks after LUL. After discontinuation of anticoagulation therapy, development of PVST was confirmed by computed tomography scan at 12 months after LUL resulting in cerebral infarction.

[Reconstruction of the superior vena cava for invasive thymoma under monitoring of regional cerebral saturation of oxygen].

A 63-year-old man was referred to our department for surgical resection of invasive thymoma (type B3)after 2 courses of chemo-therapy resulted in stable disease. Resection of the tumor was done through a median sternotomy under monitoring of regional cerebral saturation of oxygen (rSo2) using near-infrared spectroscopy (NIRS). The tumor invaded to the right upper lobe (S3), the right phrenic nerve, the superior vena cava (SVC), and the bilateral brachiocephalic vein (BCV). Although bilateral clamping of the BCVs induced significant decrease in rSo2, unilateral clamping of the BCV did not. Therefore, reconstruction of the SVC by sequential reconstruction of BCVs was carried out, and the tumor was successfully and safely excised with the SVC and a part of the right upper lobe.

Evaluation of the Factors Affecting Higher Hospitalization Cost of Lung Resection for Primary Lung Cancer: A Retrospective Cohort Study.

PURPOSE: This study aims to evaluate the factors associated with the higher hospitalization cost of lung resection for primary lung cancer to contribute to the reduction of healthcare spending. METHODS: A total of 435 consecutive primary lung cancer patients who underwent lung resection by a single surgeon at a single institution were enrolled. Baseline patient characteristics, operative procedures, postoperative complications, and postoperative courses were analyzed in relation to the hospitalization cost. Patients with higher costs (exceeding the third quartile [TQ]) were compared with patients with lower costs (less than TQ). RESULTS: Median and TQ medical costs for overall cases were 11177 US dollars (USD) and 12292 USD, respectively. Smoking history, history of coronary artery disease, previous thoracotomy, multiple sealant material use, transfusion, tumor factor T3 or higher, squamous cell carcinoma, postoperative complications, and longer postoperative hospital stay (>10 POD) were significant risk factors for increased hospitalization cost in multivariate analysis. The 5-year survival rate was significantly lower in the higher hospitalization cost group. CONCLUSION: In addition to postoperative complications and prolonged hospitalization, patient background, histological types, and intraoperative factors were also considered as the risk factors for higher medical costs.

The impact of diabetic polyneuropathy on toe grip strength in patients with type 2 diabetes mellitus: a cross-sectional study.

Purpose: Type 2 diabetes mellitus (T2DM) and concomitant diabetic polyneuropathy (DPN) induce muscle weakness. Muscle weakness in the foot is associated with foot deformities and falls. However, factors affecting toe grip strength (TGS) are not well known. Therefore, the present study investigated factors related to TGS in patients with T2DM. Methods: This was a cross-sectional study involving 100 patients with T2DM who were hospitalized for the treatment of T2DM and 50 healthy adults. The subjects were divided into three groups: a group of healthy subjects, a group of T2DM patients without DPN, and a group of T2DM patients with DPN. Hierarchical multiple regression analysis was performed with TGS and the TGS-to-weight ratio (TGS/Wt%) as dependent variables and with age, the presence of T2DM, and DPN as independent variables, and sex and BMI as confounders. Results: There were no significant differences in age or sex among the three groups. In the final regression analysis, age and presence of T2DM and DPN were associated in both models with TGS and TGS/Wt% as dependent variables. Conclusion: DPN, T2DM, and age were found to be related to TGS. The findings of this study could contribute to healthcare providers developing foot care and rehabilitation programs for diabetic patients. Trial registration: This study was registered with UMIN-CTR (UMIN000034320) on 1 November 2018.

Detecting service chains and feature interactions in sensor-driven home network services.

Sensor-driven services often cause chain reactions, since one service may generate an environmental impact that automatically triggers another service. We first propose a framework that can formalize and detect such service chains based on ECA (event, condition, action) rules. Although the service chain can be a major source of feature interactions, not all service chains lead to harmful interactions. Therefore, we then propose a method that identifies feature interactions within the service chains. Specifically, we characterize the degree of deviation of every service chain by evaluating the gap between expected and actual service states. An experimental evaluation demonstrates that the proposed method successfully detects 11 service chains and 6 feature interactions within 7 practical sensor-driven services.

[Multilocular thymic cyst associated with rheumatoid arthritis].

A 66-year-old woman had been receiving treatment for rheumatoid arthritis( RA) since her 28 years of age. Chest computed tomography( CT) taken during follow-up showed an anterior mediastinal tumor of 35×20×65 mm in size as a region of heterogeneous internal density. Accumulation of 18F-fluorodeoxyglu cose was identified on positron emission tomography( PET)[ maximum standardized uptake value( SUV max) 8.7]. Thymic epithelial tumor( thymoma or thymic cancer) with cystic degeneration was initially suspected, so total thymectomy was performed. A multilocular, non-invasive tumor mass was completely resected. Pathological diagnosis was lymphoid follicular hyperplasia with concomitant multilocular thymic cyst( MTC). Surgery resulted in alleviation of RA symptoms and a decreased inflammatory response. Inflammation due to autoimmune disease is believed to play an important role in the formation of MTC. In the present case, surgery may have inhibited the progression of RA.

Upper thoracic empyema and concomitant superior vena cava syndrome treated with reconstructive surgery using a pedicled omental flap.

Superior vena cava (SVC) syndrome refers to a constellation of symptoms secondary to obstruction of blood flow through the SVC. In this condition, venous blood that usually drains into the SVC is diverted into the inferior vena cava (IVC) via collateral veins. Reconstructive surgery is challenging in such cases owing to the anomalous venous system. In this case report, we describe reconstructive surgery using a pedicled omental flap in a patient with upper thoracic empyema and concomitant SVC syndrome. A 68-year-old man underwent resection of malignant thymoma, the bilateral brachiocephalic veins, and a part of the right upper lobe, followed by polytetrafluoroethylene (PTFE) graft placement for venous system reconstruction, 2 years prior to presentation. He developed postoperative upper thoracic cavity empyema, which necessitated PTFE graft removal. Although the infection was controlled after 2 months, multiple right upper lobe pulmonary fistulas persisted, and the patient was referred to our department for further evaluation. Contrast-enhanced computed tomography revealed SVC syndrome characterized by SVC obstruction and consequent drainage of venous blood from the upper trunk into the IVC via collateral vessels. We debrided necrotic and infected tissues, and a pedicled omental flap was placed for upper lobe fistula coverage. The patient showed an uncomplicated postoperative course, and no recurrent empyema or pulmonary fistulas were observed 3 years postoperatively. Flaps associated with the SVC system show high venous pressures. The use of a pedicled omental flap was deemed feasible because this graft reaches the upper thorax even though it is associated with the IVC system.

A Patient with Lung Adenocarcinoma Accompanied by Whole Right Lung Torsion Induced by the Accumulation of a Large Amount of Pleural Effusion.

A 68-year-old man visited a physician with a chief complaint of difficulty breathing. Right pleural effusion was noted, and he was referred to our department for a close examination and treatment. Thoracoscopy was performed under local anesthesia, and pleural dissemination of lung adenocarcinoma was noted, so a chest drain was placed. Since poor right lung inflation persisted and whole right lung torsion was observed on computed tomography, thoracoscopy-assisted thoracotomic reduction of lung torsion was performed. In this patient, the right middle lobe and anterior chest wall were adhered, suggesting that whole right lung torsion occurred when atelectasis was formed due to pleural effusion.

Pleomorphic Carcinoma with Exophthalmos and a Subsequent Diagnosis of Paraneoplastic Syndrome.

The patient was a 75-year-old man who developed polyopia and exophthalmos. Chest computed tomography (CT) revealed a mass in the left upper lobe. A CT-guided biopsy suggested lung adenocarcinoma. He was treated by neoadjuvant chemotherapy followed by left upper lobectomy. He was diagnosed with stage IIB pleomorphic carcinoma postoperatively. Preoperative head magnetic resonance imaging revealed exophthalmos and bilateral swelling of the extraocular muscles. The thyroid function of the patient was within the normal range, and he tested negative for autoantibodies. As his symptoms and swelling of the extraocular muscles improved postoperatively, he was diagnosed with paraneoplastic syndrome.

Suppression of right ventricular hypertrophy after extensive pulmonary resection in rats by granulocyte colony-stimulating factor.

BACKGROUND: The objective of the present study was to investigate the effects of granulocyte colony-stimulating factor (G-CSF) on right ventricular hypertrophy following extensive pulmonary resection in rats. MATERIALS AND METHODS: Adult rats were divided into four groups: (1) Group S (right thoracotomy only); (2) Group L (right three lobectomy); (3) Group LG10 (Group L+G-CSF [10microg/kg/d]); and (4) Group LG100 (Group L+G-CSF [100microg/kg/d]). At postoperative day 21, weight ratio of the right ventricular to the left ventricle plus septum (RV/LV+S, indicator of right ventricular hypertrophy) were measured, and a histopathological study was conducted to determine percentage wall thickness of peripheral pulmonary arteries and proliferating cell nuclear antigen labeling index (indicator of oxidative DNA damage) of right ventricles. RESULTS: Mean RV/LV+S for Group S was 0.27+/-0.02, significantly smaller than that for the lobectomy groups (Group L, LG10, LG100; 0.47+/-0.05, 0.35+/-0.02, 0.38+/-0.05). G-CSF significantly suppressed right ventricular hypertrophy. Mean medial wall thickness of peripheral pulmonary arteries for Group S was 13.6% +/- 4.9%, significantly smaller than that for Group L (22.9% +/- 9.6%). Compared with Group L, G-CSF reduced medial wall thickness (LG10, 17.6% +/- 9.5%; LG100, 18.0% +/- 11.2%). Incidence of proliferating cell nuclear antigen positive nuclei for Group S was 1.07% +/- 0.49%, significantly smaller than that for Group L (13.77% +/- 5.87%). G-CSF significantly reduced the incidence of proliferating cell nuclear antigen positive nuclei (LG10, 4.04% +/- 2.14%; LG100, 3.18% +/- 1.66%). CONCLUSIONS: G-CSF administration not only reduce medial wall thickness of peripheral pulmonary arteries but also directly protect cardiomyocytes of the right ventricle, thus suppressing right ventricular hypertrophy. These results suggest that low-dose G-CSF administration can prevent right heart failure following extensive pulmonary resection.

Our tips for bronchoplasty using suture holder and tourniquet.

Bronchial anastomosis is an important part of successful bronchoplasty, but it takes time to achieve stable results because of few opportunities to do it. To ensure a stable outcome, we have applied some tips for bronchial anastomosis. One of the tips is the use of a suture holder to obtain appropriate suture pitches, adjusting the discrepancy of the bronchial diameter, and another one is the use of a tourniquet to obtain an adequate tension upon tying the knots, ensuring good operative view.

Walking speed affects instrumental activities of daily living in patients with hip osteoarthritis.

BACKGROUND: The symptoms of hip osteoarthritis (OA) influence instrumental activities of daily living (IADL). Evidence form previous studies suggest that body functions and walking speed are important etiological factors for IADL. However, no studies have investigated which factors that have the greatest influence on IADL. OBJECTIVE: The aims of this study were (1) to analyze factors related to IADL in patients with hip OA, including 10 m walking speed (10 mWS), and (2) to establish cut-off values for factors that predict maintenance of IADL. METHODS: Forty-eight patients participated in this study. IADL was treated as dependent variable. Range of motion (ROM), muscle strength of the hips and knees, and 10 mWS were measured as independent variables. Other potential confounding factors were also measured. Data were analyzed using hierarchical multiple regression and Receiver Operating Characteristic curve analysis. RESULTS: The hip flexion ROM on the affected side and 10 mWS were selected as significant variables in this study. The cut-off values obtained were 92.5 degrees for the hip flexion ROM on the affected side and 42.3 m/min for 10 mWS. CONCLUSIONS: The suggested target associated with maintaining IADL in patients with hip OA is the cut-off value of 42.3 m/min for 10 mWS found in this study.