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Multiple mask and boundary scoring R-CNN with cGAN data augmentation for bladder tumor segmentation in WLC videos. Artif Intell Med 2024; 147:102723. [PMID: 38184356 DOI: 10.1016/j.artmed.2023.102723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 11/19/2023] [Accepted: 11/22/2023] [Indexed: 01/08/2024]
Abstract
Automatic diagnosis systems capable of handling multiple pathologies are essential in clinical practice. This study focuses on enhancing precise lesion localization, classification and delineation in transurethral resection of bladder tumor (TURBT) to reduce cancer recurrence. Despite deep learning models success, medical applications face challenges like small and limited datasets and poor image characterization, including the absence lack of color/texture modeling. To address these issues, three solutions are proposed: (1) an improved texture-constrained version of the pix2pixHD cGAN for data augmentation, addressing the tradeoff of generating high-quality images with enough stochasticity using the Fréchet Inception Distance (FID) measure. (2) Introducing the Multiple Mask and Boundary Scoring R-CNN (MM&BS R-CNN), a new mask sub-net scheme where multiple masks are generated from the different levels of the mask sub-net pipeline, improving segmentation accuracy by including a new scoring module to refine object boundaries. (3) A novel accelerated training strategy based on the SGD optimizer with the second momentum. Experimental results show significant mAP improvements: the data generation scheme improves by more than 12 %; MM&BS R-CNN proposed architecture is responsible for an improvement of about 1.25 %, and the training algorithm based on the second-order momentum increases mAP by 2-3 %. The simultaneous use of all three proposals improved the state-of-the-art mAP by 17.44 %.
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Severity of precapillary pulmonary hypertension: Predictive factor. Pulmonology 2023; 29 Suppl 4:S25-S35. [PMID: 34969648 DOI: 10.1016/j.pulmoe.2021.11.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Revised: 11/16/2021] [Accepted: 11/17/2021] [Indexed: 11/24/2022] Open
Abstract
BACKGROUND AND OBJECTIVES Patients with pulmonary arterial hypertension (PAH) require risk assessments for prognosis and appropriate therapy. These assessments need to be improved by incorporating clinical and laboratory data such as the analysis of the right ventricle. We aim to establish echocardiographic morphometric data of the right ventricle and its relationship with the left ventricle, to estimate the hemodynamic severity of precapillary pulmonary hypertension (PHprecapillary). METHODS This cohort, prospective, observational, and cross-sectional study included 41 consecutive patients with PHprecapillary using echocardiographic study and cardiac catheterization. RESULTS Patients' mean age was 44.0±16.4 years, and 37 were women (90.2%). Idiopathic PAH was diagnosed in 18 patients (43.9%). The World Health Organization/New York Association functional class was III or IV in 31 patients (75.6%). The ratio of the right to left ventricles (RV/LV) echocardiographic diastolic diameters was associated with pulmonary arterial pressures in cardiac catheterization, with the best cutoff per receiver operating characteristic curve being 0.8 for systolic pressure (sensitivity 90.0%, specificity 78.3%, area under the curve [AUC] 0.882) and mean pressure (sensitivity 60.0%, specificity 95.7%, AUC 0.823). Spearman's correlation (R) of RV/LV echocardiographic ratio and the hemodynamic variables was significant for systolic pressure (R = 0.7015, p < 0.0001), mean pressure (R = 0.6332, p < 0.0001), transpulmonary pressure gradient (R = 0.6524, p < 0.0001), pulmonary vascular resistance (R = 0.6076, p = 0.0021), and pulmonary vascular resistance index (R = 0.6229, p = 0.0014). CONCLUSION The ratio of RV/LV echocardiographic diastolic diameters contribute to the estimates the hemodynamic severity of precapillary pulmonary hypertension. The best cutoff for this assessment was RV/LV of 0.8.
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CycleGAN-Based Image to Image Translation for Realistic Surgical Training Phantoms. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2023; 2023:1-4. [PMID: 38083631 DOI: 10.1109/embc40787.2023.10340986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2023]
Abstract
Training in surgery is essential for surgeons to develop skill and dexterity. Physical training phantoms provide excellent haptic feedback and tissue properties for stitching and operating with authentic instruments and are easily available. However, they lack realistic traits and fail to reflect the complex environment of a surgical scene. Generative Adversarial Networks can be used for image-to-image translation, addressing the lack of realism in physical phantoms, by mapping patterns from the intraoperative domain onto the video stream captured during training with these surgical simulators. This work aims to achieve a successful I2I translation, from intra-operatory mitral valve surgery images onto a surgical simulator, using the CycleGAN model. Different experiments are performed - comparing the Mean Square Error Loss with the Binary Cross Entropy Loss; validating the Fréchet Inception Distance as a training and image quality metric; and studying the impact of input variability on the model performance. Differences between MSE and BCE are modest, with MSE being marginally more robust. The FID score proves to be very useful in identifying the best training epochs for the CycleGAN I2I translation architecture. Carefully selecting the input images can have a great impact in the end results. Using less style variability and input images with good feature details and clearly defined characteristics enables the network to achieve better results.Clinical Relevance- This work further contributes for the domain of realistic surgical training, successfully generating fake intra operatory images from a surgical simulator of the cardiac mitral valve.
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P109 Addition of platinum analogues to neoadjuvant chemotherapy improving pathologic complete response among triple negative breast cancer patients. Real World Evidence. Breast 2023. [DOI: 10.1016/s0960-9776(23)00226-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/17/2023] Open
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Extraperitoneal RASP – is there still room for the intraperitoneal approach? EUR UROL SUPPL 2022. [DOI: 10.1016/s2666-1683(22)02192-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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Double-J ureteral stents incrustation pattern characterization on scanning electron microscope. EUR UROL SUPPL 2022. [DOI: 10.1016/s2666-1683(22)00166-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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Is prostate cancer diagnosis affected by biopsy needle length? A prospective study. EUR UROL SUPPL 2021. [DOI: 10.1016/s2666-1683(21)03102-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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Internal and external metal-based coatings to prevent uropathogen adhesion on stents. Eur Urol 2021. [DOI: 10.1016/s0302-2838(21)00528-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Percutaneous nephrostomy, ureteral stent or primary ureteroscopy with stone removal for the treatment of hydronephrosis secondary to ureteric calculi: A prospective evaluation of the impact on complications, stone management and health-related QoL. EUR UROL SUPPL 2020. [DOI: 10.1016/s2666-1683(20)33280-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Abstract
BACKGROUND Studies into the mental health of firefighters have primarily focussed on individual factors (e.g. biological and psychological factors). Little is known about how exposure to traumatic events and psychosocial and organizational work factors influence firefighters' mental health despite the evidence that these are important for employee health. AIMS To study job demands, job control, social support and operational trauma as predictors of firefighters' psychiatric morbidity, and whether job control and social support moderate these relationships. METHODS Participants were drawn from a longitudinal cohort study of firefighters in Brazil. Portuguese-language variants of the Self-Report Questionnaire (SRQ-20) and Traumatic Events List for Emergency Professionals measured psychiatric morbidity and exposure to traumatic events. Job demands, job control and social support were measured by the Job Stress Scale. Hierarchical regressions were run controlling for socio-demographics and previous psychiatric morbidity. Subsequent regression steps first included the proposed predictors followed by their interactions. RESULTS Thirteen per cent of the sample (n = 40/312) met the caseness criteria indicating psychiatric morbidity. Operational trauma, job demands, job control and social support predicted psychiatric morbidity. Both job control and social support functioned as moderators and where these moderators were high, the job demands and psychiatric morbidity relationships were weaker. CONCLUSIONS These findings show that psychosocial factors and operational trauma predict firefighters' psychiatric morbidity. Crucially, the results that improving social support and job control could mitigate the detrimental influence of job demands highlight the need for more research and practice towards organizational-level interventions.
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Abstract
BACKGROUND Percutaneous access to the renal pelvis still remains the most difficult step before nephrolitholapaxy (PCNL). New imaging techniques, such as 3D imaging and various navigation instruments such as electromagnetic, sonographic, CT-controlled and marker-based/iPAD try to simplify this step and reduce complications. OBJECTIVES In this review, various new techniques for puncturing the renal collecting system are presented and their advantages and disadvantages are evaluated. MATERIALS AND METHODS A systematic literature search was carried out in MEDLINE, whereby only puncture techniques that have already been evaluated in clinical studies were included. RESULTS Five different navigation methods for puncturing the renal pelvis before PCNL were found. CONCLUSION Intraoperative navigation can be useful when puncturing the collecting system. The combination of ultrasound and fluoroscopy currently remains the gold standard. However, there is still a need for further, primarily clinical, prospective studies to determine which new imaging technology and navigation systems will prevail and thus facilitate the access route to the kidney, especially in the case of special anatomical conditions.
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Use of hemostatic agents for surgical bleeding in laparoscopic partial nephrectomy: Biomaterials perspective. J Biomed Mater Res B Appl Biomater 2020; 108:3099-3123. [PMID: 32458570 DOI: 10.1002/jbm.b.34637] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Accepted: 04/29/2020] [Indexed: 12/20/2022]
Abstract
In recent years, there was an abrupt increase in the incidence of renal tumors, which prompt up the appearance of cutting-edge technology, including minimally invasive and organ-preserving approaches, such as laparoscopic partial nephrectomy (LPN). LPN is an innovative technique used to treat small renal masses that have been gaining popularity in the last few decades due to its promissory results. However, the bleeding control remains the main challenge since the majority of currently available hemostatic agents (HAs) used in other surgical specialities are inefficient in LPN. This hurried the search for effective HAs adapted for LPN surgical peculiarities, which resulted on the emergence of different types of topical HAs. The most promising are the natural origin HAs because of their inherent biodegradability, biocompatibility, and lowest toxicity. These properties turn them top interests' candidates as HAs in LPN. In this review, we present a deep overview on the progress achieved in the design of HAs based on natural origin polymers, highlighting their distinguishable characteristics and providing a clear understanding of their hemostat's role in LPN. This way it may be possible to establish a structure-composition properties relation, so that novel HAs for LPN can be designed to explore current unmet medical needs.
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MP15-05 PERCUTANEOUS NEPHROSTOMY, URETERAL STENT OR PRIMARY URETEROSCOPY WITH STONE REMOVAL FOR THE TREATMENT OF HYDRONEPHROSIS SECONDARY TO URETERIC CALCULI: A PROSPECTIVE EVALUATION OF THE IMPACT ON COMPLICATIONS, STONE MANAGEMENT AND HEALTH-RELATED QUALITY OF LIFE. J Urol 2020. [DOI: 10.1097/ju.0000000000000840.05] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Impact of time to second transurethral resection on oncological outcomes of patients with high-grade T1 bladder cancer treated with intravesical Bacillus Calmette-Guerin. World J Urol 2020; 38:3161-3167. [PMID: 32062805 DOI: 10.1007/s00345-020-03108-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Accepted: 01/27/2020] [Indexed: 12/14/2022] Open
Abstract
PURPOSE To determine the impact of time to restaging transurethral resection (Re-TUR) on recurrence-free survival (RFS), progression-free survival (PFS), and cancer specific survival (CSS) of patients with high-grade T1 bladder cancer (BC) treated with intravesical Bacillus Calmette-Guerin (BCG). MATERIALS AND PATIENTS Our prospectively maintained NMIBC databases were queried to identify patients with high-grade T1 BC who underwent Re-TUR before receiving intravesical BCG treatment (induction + 1-year maintenance). Patients were divided into three groups based on time to Re-TUR (group A: ≤ 6 weeks; group B: > 6-12 weeks; group C: > 12-18 weeks). Kaplan-Meier plots were used to estimate differences in RFS, PFS, and CSS. Multivariate Cox regression analysis was used to assess the impact of time to Re-TUR on oncological outcomes. RESULTS Overall, 269 high-grade T1 BC patients were eligible for the analysis. Nineteen (7.1%) had concomitant CIS. Median follow-up was 49.3 (IQR 25-65) months. Kaplan-Meier plots showed no differences in RFS, PFS, and CSS between the three groups. Multivariate Cox regression analysis showed that Group B had a slightly better RFS, while the other outcomes were not affected by time to Re-TUR. CONCLUSIONS This is the first study testing the role of time to Re-TUR in a homogeneous population of patients with high-grade T1 BC who received complete BCG treatment. The study challenged the concept the sooner the Re-TUR the better, since time to Re-TUR did not significantly affect oncological outcomes.
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New endoscopic procedure for bladder wall closure: results from the porcine model. Sci Rep 2019; 9:18747. [PMID: 31822690 PMCID: PMC6904675 DOI: 10.1038/s41598-019-54304-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Accepted: 11/07/2019] [Indexed: 11/27/2022] Open
Abstract
Upper urinary tract urothelial carcinomas are usually managed by radical nephroureterectomy (RNU), often followed by intravesical chemotherapy to minimize recurrence. Open surgery is the gold standard procedure for RNU, but it associates with high morbidity, and it has been increasingly replaced by minimally invasive strategies, such as laparoscopy and endoscopy. Although effective, endoscopic ureteral excision leaves the bladder unsutured, increasing the risk of tumor spillage, and precluding the immediate administration of intravesical chemotherapy. Here we describe a new method to close the bladder wall after ureteral excision, using barbed sutures via the endoscopic access. Our results in 8 female pigs demonstrate that this method is effective to close the bladder wall. The procedure was completed in a median time of 24 min, and no adverse events were registered in the follow-up or at the three-week necropsy. This technique improves a previous approach described by our group because the device is more flexible and allows to tie the knots inside the bladder. Barbed sutures have been used in the clinical practice for other types of surgeries, and therefore this method can further be adapted to human patients with no safety concerns. Its use may allow to administer intravesical chemotherapy, which reduces tumor recurrence and improves patient outcomes.
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Efficacy and safety of a combined anesthetic technique for transrectal prostate biopsy: a single center, prospective, randomized study. Cent European J Urol 2019; 72:258-262. [PMID: 31720027 PMCID: PMC6830480 DOI: 10.5173/ceju.2019.1936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2019] [Revised: 08/09/2019] [Accepted: 09/05/2019] [Indexed: 11/29/2022] Open
Abstract
Introduction A transrectal ultrasound-guided (TRUS) biopsy is the gold standard for diagnosis of prostatic neoplasia. This exam is associated with pain and discomfort, and numerous methods of analgesia during this procedure have been described. There is still no consensus among urologists about the pain control technique that should be performed, even though the periprostatic basal nerve block is the most studied technique. The main objective of this study is to evaluate the benefit of adding local periapical prostatic anesthesia to the traditional periprostatic basal nerve block during TRUS biopsy. Material and methods A total of 70 patients with indication for TRUS biopsy were enrolled in this study. Patients were randomized into 2 groups. Group 1 received a periprostatic basal nerve block. Group 2 received both periapical prostatic and periprostatic basal nerve blocks . The pain experienced during different moments of the procedure (introduction of the probe, anesthesia administration, removal of cores and 30 minutes after biopsy) was assessed using visual analog scales of one to ten. The rate of complications at 30 days post-biopsy was also assessed. Results The difference in pain during the distinct moments of the TRUS biopsy was not significant between the two groups. There were no significant differences concerning age, level of total prostate-specific antigen (PSA) and prostate volume in both groups. There were also no statistically significant differences between the groups regarding the occurrence of complications and pathological findings. Conclusions The administration of concurent periprostatic basal and periapical nerve blocks has no significant benefits as compared to a periprostatic basal nerve block alone.
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Using lamb sales data to investigate associations between implementation of disease preventive practices and sheep flock performance. Animal 2019; 13:2630-2638. [PMID: 31094306 DOI: 10.1017/s1751731119001058] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Although the UK is the largest lamb meat producer in Europe, there are limited data available on sheep flock performance and on how sheep farmers manage their flocks. The aims of this study were to gather evidence on the types of disease control practices implemented in sheep flocks, and to explore husbandry factors associated with flock productivity. A questionnaire focusing on farm characteristics, general husbandry and flock health management was carried out in 648 farms located in the UK over summer 2016. Abattoir sales data (lamb sales over 12 months) was compared with the number of breeding ewes on farm to estimate flock productivity (number of lambs sold for meat per 100 ewes per farm per year). Results of a multivariable linear regression model, conducted on 615 farms with complete data, indicated that farms vaccinating ewes against abortion and clostridial agents and administering a group 4/5 anthelmintic to ewes (as recommended by the Sustainable Control of Parasites in Sheep Initiative) during quarantining had a greater flock productivity than farms not implementing these actions (P<0.01 and 0.02, respectively). Flocks with maternal breed types had higher productivity indexes compared with flocks with either pure hill or terminal breeds (P<0.01). Farms weighing lambs during lactation had greater productivity than those not weighing (P<0.01). Importantly, these actions were associated with other disease control practices, for example, treating individual lame ewes with an antibiotic injection, weaning lambs between 13 and 15 weeks of age and carrying out faecal egg counts, suggesting that an increase in productivity may be associated with the combined effect of these factors. This study provides new evidence on the positive relationship between sheep flock performance and disease control measures and demonstrates that lamb sales data can be used as a baseline source of information on flock performance and for farm benchmarking. Further research is needed to explore additional drivers of flock performance.
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Technical Note: Assessment of electromagnetic tracking systems in a surgical environment using ultrasonography and ureteroscopy instruments for percutaneous renal access. Med Phys 2019; 47:19-26. [PMID: 31661566 DOI: 10.1002/mp.13879] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Revised: 10/01/2019] [Accepted: 10/21/2019] [Indexed: 12/19/2022] Open
Abstract
PURPOSE Electromagnetic tracking systems (EMTSs) have been proposed to assist the percutaneous renal access (PRA) during minimally invasive interventions to the renal system. However, the influence of other surgical instruments widely used during PRA (like ureteroscopy and ultrasound equipment) in the EMTS performance is not completely known. This work performs this assessment for two EMTSs [Aurora® Planar Field Generator (PFG); Aurora® Tabletop Field Generator (TTFG)]. METHODS An assessment platform, composed by a scaffold with specific supports to attach the surgical instruments and a plate phantom with multiple levels to precisely translate or rotate the surgical instruments, was developed. The median accuracy and precision in terms of position and orientation were estimated for the PFG and TTFG in a surgical environment using this platform. Then, the influence of different surgical instruments (alone or together), namely analogic flexible ureterorenoscope (AUR), digital flexible ureterorenoscope (DUR), two-dimensional (2D) ultrasound (US) probe, and four-dimensional (4D) mechanical US probe, was assessed for both EMTSs by coupling the instruments to 5-DOF and 6-DOF sensors. RESULTS Overall, the median positional and orientation accuracies in the surgical environment were 0.85 mm and 0.42° for PFG, and 0.72 mm and 0.39° for TTFG, while precisions were 0.10 mm and 0.03° for PFG, and 0.20 mm and 0.12° for TTFG, respectively. No significant differences were found for accuracy between EMTSs. However, PFG showed a tendency for higher precision than TTFG. AUR, DUR, and 2D US probe did not influence the accuracy and precision of both EMTSs. In opposition, the 4D probe distorted the signal near the attached sensor, making readings unreliable. CONCLUSIONS Ureteroscopy- and ultrasonography-assisted PRA based on EMTS guidance are feasible with the tested AUR or DUR together with the 2D probe. More studies must be performed to evaluate the probes and ureterorenoscopes' influence before their use in PRA based on EMTS guidance.
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B-43 Adolescent Recovery Following TBI: Moderators of Change Over Time. Arch Clin Neuropsychol 2019. [DOI: 10.1093/arclin/acz034.126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Objective
The study aimed to assess (1) whether the severity of a TBI affects performance on a measure of memory, and (2) whether FSIQ, VIQ, and PIQ moderate recovery following TBI, over time, after controlling for severity of injury.
Method
TBI patients (n = 60) were recruited from admissions to the Loma Linda University Children’s Hospital (LLUCH). Indicators of memory and learning were assessed with the CMS for all the children (ages 6 to 16), while overall cognitive abilities were assessed with the WASI-II. These data are a component of a larger neuropsychology assessment battery collected at 3 and 12 months post-injury.
Results
Simple Linear Regression was conducted in SPSS. Results indicated that severity of injury explained a significant amount of the variance in participant’s performance on overall memory at the initial evaluation (R2 = .154). As severity of injury increased by one-point, general memory declined by .392 points, 95%CI [.820, 3.233] (p < .001). Three moderation analyses using model one of the PROCESS macro for SPSS were conducted to assess whether FSIQ, VIQ, or PIQ moderated recovery from TBI over time. We controlled for the severity of injury. FSIQ, VIQ, and PIQ did not significantly moderate verbal, nonverbal, or general memory recovery of moderate-to-severe TBI over time (ps > .05).
Conclusions
Results of the study suggest that, after controlling for severity of injury, FSIQ, VIQ, and PIQ did not significantly moderate recovery following a TBI. Given that research suggests that higher premorbid IQ is associated with more favorable outcomes, further investigation is warranted.
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Absolute basophil count is associated with time to recurrence in patients with high-grade T1 bladder cancer receiving bacillus Calmette-Guérin after transurethral resection of the bladder tumor. World J Urol 2019; 38:143-150. [PMID: 30993426 DOI: 10.1007/s00345-019-02754-2] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Accepted: 04/01/2019] [Indexed: 01/28/2023] Open
Abstract
BACKGROUND Basophils, eosinophils and monocytes may be involved in BCG-induced immune responses and be associated with outcomes of bladder cancer patients receiving intravesical BCG. Our objective was to explore the association of baseline counts of basophils, eosinophils and monocytes with outcomes of patients with high-grade T1 bladder cancer receiving a standard course of intravesical BCG. METHODS We retrospectively reviewed medical records of patients with primary T1 HG/G3 bladder cancer. After re-TURBT, patients were treated with a 6-week course of intravesical BCG induction followed by intravesical BCG every week for 3 weeks given at 3, 6, 12, 18, 24, 30 and 36 months from initiation of therapy The analysis of potential risk factors for recurrence, muscle invasion and cancer-specific and overall survival was performed using univariable Cox regression models. Those factors that presented, at univariate analysis, an association with the event at a liberal p < 0.1, have been selected for the development of a multivariable model. RESULTS A total of 1045 patients with primary T1 HG/G3 were included. A total of 678 (64.9%) recurrences, 303 (29.0%) progressions and 150 (14.3%) deaths were observed during follow-up. Multivariate analysis showed that logarithmic transformation of basophils count was associated with a 30% increment in the hazard of recurrence per unit increase of logarithmic basophils count (HR 1.30; 95% confidence interval 1.09-1.54; p = 0.0026). Basophil count modeled by quartiles was also significantly associated with time to recurrence [second vs. lower quartile HR 1.42 (1.12-1.79); p = 0.003, third vs. lower quartile HR 1.26 (1.01-1.57); p = 0.041; upper vs. lower quartile HR 1.36 (1.1-1.68); p = 0.005]. The limitations of a retrospective study are applicable. CONCLUSION Baseline basophil count may predict recurrence in BCG-treated HG/G3 T1 bladder cancer patients. External validation is warranted.
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Atorvastatin prevents lipopolysaccharide-induced depressive-like behaviour in mice. Brain Res Bull 2019; 146:279-286. [PMID: 30690060 DOI: 10.1016/j.brainresbull.2019.01.018] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 11/21/2018] [Accepted: 01/22/2019] [Indexed: 12/14/2022]
Abstract
Clinical and pre-clinical evidences indicate an association between inflammation and depression since increased levels of pro-inflammatory cytokines are associated with depression-related symptoms. Atorvastatin is a cholesterol-lowering statin that possesses pleiotropic effects including neuroprotective and antidepressant actions. However, the putative neuroprotective effect of atorvastatin treatment in the acute inflammation mice model of depressive-like behaviour has not been investigated. In the present study, we aimed to investigate the effect of atorvastatin treatment on lipopolysaccharide (LPS) induced depressive-like behaviour in mice. Mice were treated with atorvastatin (1 or 10 mg/kg, v.o.) or fluoxetine (30 mg/kg, positive control, v.o.) for 7 days before LPS (0.5 mg/kg, i.p.) injection. Twenty four hours after LPS infusion, mice were submitted to the forced swim test, tail suspension test or open field test. After the behavioural tests, mice were sacrificed and the levels of tumour necrosis factor-α (TNF-α), brain-derived neurotrophic factor (BDNF), glutathione and malondialdehyde were measured. Atorvastatin (1 or 10 mg/kg/day) or fluoxetine treatment prevented LPS-induced increase in the immobility time in the forced swim and tail suspension tests with no alterations in the locomotor activity evaluated in the open field test. Atorvastatin (1 or 10 mg/kg/day) or fluoxetine treatment also prevented LPS-induced increase in TNF-α and reduction of BDNF levels in the hippocampus and prefrontal cortex. Treatment with atorvastatin (1 or 10 mg/kg/day) or fluoxetine prevented LPS-induced increase in lipid peroxidation and the reduction of glutathione levels in the hippocampus and prefrontal cortex. The present study suggests that atorvastatin treatment exerted neuroprotective effects against LPS-induced depressive-like behaviour which may be related to reduction of TNF-α release, oxidative stress and modulation of BDNF expression.
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Surface-based registration between CT and US for image-guided percutaneous renal access - A feasibility study. Med Phys 2019; 46:1115-1126. [DOI: 10.1002/mp.13369] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Revised: 12/13/2018] [Accepted: 12/19/2018] [Indexed: 12/30/2022] Open
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PSX-37 Influence of type of birth and sex on weight the weaning of Dorper crossbred lambs. J Anim Sci 2018. [DOI: 10.1093/jas/sky404.1024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Late presentation of vesicoureteral reflux: An unusual cause of pyelonephritis in adults. Int J Surg Case Rep 2018; 53:238-241. [PMID: 30428440 PMCID: PMC6232627 DOI: 10.1016/j.ijscr.2018.10.058] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Accepted: 10/22/2018] [Indexed: 12/25/2022] Open
Abstract
Vesicoureteral reflux presenting for the first time in adults is rare. The diagnosis should be suspicious in adult patients with recurrent Pyelonephritis without recognizable cause. Endoscopic treatment with bulking agents is a minimally invasive technique with good results for adult vesicoureteral reflux.
Introduction: Vesicoureteral reflux (VUR) corresponds to the reflux of urine from the bladder into the upper urinary system. It can be a congenital or an acquired anomaly and although its incidence is high in children it is uncommon in the adult life. One of its presentations in the adult population is the presence of recurrent Pyelonephritis. Case presentation: Here we report a case of an adult patient with repetitive uncomplicated pyelonephritis caused by VUR. VUR was successfully managed endoscopically with subureteral injection of a bulking agent. A literature review of adult presenting VUR was performed. Discussion: The first presentation of VUR in the adult life is rare. One of the most typical presentation is the presence of recurrent uncomplicated Pyelonephritis. Although no guidelines exists to study the presence of VUR in adult patients with Pyelonephritis, in the presence of several recurrent episodes of Pyelonephritis we should think in VUR as a possible cause. Even in adults, endoscopic management of VUR is an effective treatment with low morbidity. Conclusion: VUR can first present in the adult life, with recurrent episodes of UTI. The diagnosis is a suspicious one and is confirmed by VUCG. VUR in adults can be effectively managed with endoscopic injection of bulking agents.
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Resistance of different guidewires to laser injury: an in-vitro experiment. MINERVA UROL NEFROL 2018; 70:624-629. [PMID: 30160385 DOI: 10.23736/s0393-2249.18.03050-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND In urology, lasers are used in a variety of endoscopic procedures such as ureteroscopy and retrograde renal surgery for stone fragmentation of urinary calculi and ablation of urothelial tumors. To perform these procedures, guidewires are used as a preliminary safe-mainstay for referencing the urinary tract. This study aims to determine the effect of two different lasers: holmium:YAG (Ho:YAG) and thulium:YAG (Tm:YAG) lasers on metal guidewires with PTFE coating (PTFE), nitinol guidewires with hydrophilic coating (Hydrophilic) and nitinol guidewires with hydrophilic listed coating (Zebra). METHODS Different combinations of frequency (5, 10 and 12 Hz) and energy per pulse (0.5, 1.5, and 2.6 J) of Ho:YAG laser were applied on the three kinds of guidewires in two experiments (50 J vs. 100 J of total energy). For the Tm:YAG laser three power levels (5, 35, and 70 W) with a total energy of 100 J were applied to the guidewires. The degree of damage (0 to 5) of the guidewire was assessed after each laser application. RESULTS A higher degree of injury of guidewires was related to higher values of total energy used for the Ho:YAG laser (P=0.036), and to higher values of power applied with the Tm:YAG (P=0.051). The most resistant guidewire to Ho:YAG laser energy was Zebra, followed by PTFE and Hydrophilic (P<0.001). With the Tm:YAG laser, PTFE guidewire appears to be the most resistant and the Hydrophilic the most fragile, although without reaching the statistical significance (P=0.223). CONCLUSIONS Both lasers revealed a harmful effect on the three tested guidewires. There was an association between the degree of injury and the amount of Ho:YAG laser energy and Tm:YAG laser power. The guidewire Zebra proved to be the safest when using Ho:YAG laser and the PTFE guidewire the most resistant to laser Tm:YAG. Further studies are necessary to confirm these results.
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438 Scrotal trauma - results of a series of surgically treated patients. J Sex Med 2018. [DOI: 10.1016/j.jsxm.2018.04.344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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524 Vaccinating male individuals against human papillomavirus - an evidence-based review. J Sex Med 2018. [DOI: 10.1016/j.jsxm.2018.04.430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Ureteroscopy-assisted percutaneous kidney access with a novel navigation system using electromagnetic guidance: An updated clinical series. ACTA ACUST UNITED AC 2018. [DOI: 10.1016/s1569-9056(18)32522-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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MP45-09 EFFECTS OF CASTRATION AND TESTOSTERONE REPLACEMENT OVER SEROTONIN (PROSTATIC AND PLASMATIC): A MICE IN VIVO STUDY. J Urol 2018. [DOI: 10.1016/j.juro.2018.02.1448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Neuroprotective effect of melatonin against lipopolysaccharide-induced depressive-like behavior in mice. Physiol Behav 2018; 188:270-275. [PMID: 29458118 DOI: 10.1016/j.physbeh.2018.02.034] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Revised: 02/09/2018] [Accepted: 02/15/2018] [Indexed: 12/18/2022]
Abstract
Accumulating evidence indicates an interaction between inflammation and depression since increased levels of pro-inflammatory cytokines are associated with depression-related symptoms. Melatonin is a hormone synthesized and secreted by the pineal gland with antioxidant, anti-inflammatory and antidepressant-like effects. In this way, it would be interesting to evaluate the putative antidepressant-like effect of melatonin treatment in an acute inflammation mice model of depression. The present study aimed to investigate the effect of melatonin treatment on lipopolysaccharide (LPS) induced depressive-like behavior, neuroinflammation, oxidative stress and alteration on brain-derived neurotrophic fator (BDNF) levels. Mice were treated with melatonin (10 mg/kg, i.p.) 30 min before LPS (0.5 mg/kg, i.p.) injection. Twenty-four hours after LPS infusion, mice were submitted to the behavioral tests and, thereafter, biochemical determinations were performed. Melatonin treatment prevented LPS-induced depressive-like behavior in the forced swim and tail suspension tests with no alterations in locomotor activity evaluated in the open field test. Melatonin attenuated LPS-induced increase in tumor necrosis factor-α (TNF-α) and reduction of BDNF levels in the hippocampus. Treatment with melatonin also prevented LPS-induced increase in lipid peroxidation and the reduction of glutathione levels in the hippocampus. In conclusion, the present study suggests that melatonin treatment exerted neuroprotective effects against LPS-induced depressive-like behavior which may be related to reduction of TNF-α release, oxidative stress and modulation of BDNF expression.
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Flexural strength and reliability of CAD/CAM materials for dental applications. Dent Mater 2018. [DOI: 10.1016/j.dental.2018.08.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Precision surgery and genitourinary cancers. Eur J Surg Oncol 2017; 43:893-908. [PMID: 28254473 DOI: 10.1016/j.ejso.2017.02.005] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Accepted: 02/08/2017] [Indexed: 02/06/2023] Open
Abstract
The landscape of the surgical management of urologic malignancies has dramatically changed over the past 20 years. On one side, better diagnostic and prognostic tools allowed better patient selection and more reliable surgical planning. On the other hand, the implementation of minimally invasive techniques and technologies, such as robot-assisted laparoscopy surgery and image-guided surgery, allowed minimizing surgical morbidity. Ultimately, these advances have translated into a more tailored approach to the management of urologic cancer patients. Following the paradigm of "precision medicine", contemporary urologic surgery has entered a technology-driven era of "precision surgery", which entails a range of surgical procedures tailored to combine maximal treatment efficacy with minimal impact on patient function and health related quality of life. Aim of this non-systematic review is to provide a critical analysis of the most recent advances in the field of surgical uro-oncology, and to define the current and future role of "precision surgery" in the management of genitourinary cancers.
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A novel hydrogel of poloxamer 407 and chitosan obtained by gamma irradiation exhibits physicochemical properties for wound management. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 74:36-46. [PMID: 28254305 DOI: 10.1016/j.msec.2016.12.127] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Revised: 12/07/2016] [Accepted: 12/16/2016] [Indexed: 11/25/2022]
Abstract
Application of polymers cross-linked by gamma irradiation on cutaneous wounds has resulted in the improvement of healing. Chitosan (CH) and poloxamer 407 (P407)-based hydrogels confer different advantages in wound management. To combine the properties of both compounds, a gamma-irradiated mixture of 0.75/25% (w/w) CH and P407, respectively, was obtained (CH-P), and several physical, chemical, and biological analyses were performed. Notably, gamma radiation induced changes in the mixture's thermal behavior, viscosity, and swelling, and exhibited stability at neutral pH. The thermal reversibility provided by P407 and the bacteriostatic effect of CH were maintained. Mice full-thickness wounds treated with CH-P diminished the wound area during the first days. Consequently, with this treatment, increased levels of macrophages, α-SMA, and collagen deposition in wounds were observed, indicating a more mature scar tissue. In conclusion, the new hydrogel CH-P, at physiologic pH, combined the beneficial characteristics of both polymers and produced new properties for wound management.
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Clinical Cases: Ischaemic heart disease899Asymptomatic very late presentation of ALCAPA900Usefulness of 3-dimensional contrast echocardiography in the diagnosis of a left ventricular pseudoaneurysm after acute myocardial infarction901Peri-procedural jailing of septal perforator branch retrospectively identified using speckle tracking echocardiography902Anomalous origin of the left coronary artery from the pulmonary artery (ALCAPA)903Coronary artery compression by aneurysmal pulmonary artery904A rare complication of myocardial infarction: pseudoaneurysm leading to ischaemic VSD905Single coronary ostium from the right aortic sinus of valsalva906Incremental value of regional longitudinal strain upon visual assessment for detection of ischemia during dobutamine stress echocardiography907One serious complication after myocardial infarction, isn't that enough? Eur Heart J Cardiovasc Imaging 2016. [DOI: 10.1093/ehjci/jew257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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A-05Psychosocial Predictors of Self-Perceived Memory and Its Implications on General Health and Neuropsychological Performance. Arch Clin Neuropsychol 2016. [DOI: 10.1093/arclin/acw043.05] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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C-67Using Tests of Balance to Predict Sub-Optimal Performance on Tests of Validity in Neuropsychological Testing. Arch Clin Neuropsychol 2016. [DOI: 10.1093/arclin/acw043.216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Polymorphism of the CYP2D6 gene in women with breast cancer treated with tamoxifen. EUR J GYNAECOL ONCOL 2016; 37:700-702. [PMID: 29787014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
OBJECTIVE To evaluate polymorphism frequency of the CYP2D6*4, *10, and * 17 alleles in women with breast cancer treated with tamoxifen. MATERIALS AND METHODS Ninety-five women with estrogen and progesterone receptor-positive breast carcinoma were investigated from September to December 2013. A three-ml sample of peripheral blood was collected from each patient to analyze the presence of CYP2D6 *4, *10, and *17 allele polymorphism by specific polymerase chain reaction technique (PCR) for analysis of haplotypes *1, *4, *10, and *17, determined by studies of different single-nucleotide polymorphism (SNP). The data obtained were compiled and analyzed with the aid of Excel software 2010. RESULTS The frequency of CYP2D6 alleles *4, *10, and *17 was 16%, 29%, and 2%, respectively, and haplotype * 1/*10 was shown in 22% of the women. The phenotype of intermediate metabolism occurred in 8% of women. CONCLUSIONS The present study showed a deficiency in tamoxifen metabolism, characterized by intermediate metabolism in 8% of Brazilian women.
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The fice course and qualification - experience from the cheshire and merseyside group. Intensive Care Med Exp 2015. [PMCID: PMC4798501 DOI: 10.1186/2197-425x-3-s1-a610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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Collaborative Brazilian Pediatric Renal Transplant Registry (CoBrazPed-RTx): A Report From 2004 to 2013. Transplant Proc 2015; 47:950-3. [DOI: 10.1016/j.transproceed.2015.03.020] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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894 Serotonin inhibits prostate growth down regulating androgen receptors: Evidence for a novel theory for benign prostatic hyperplasia (BPH). ACTA ACUST UNITED AC 2015. [DOI: 10.1016/s1569-9056(15)60882-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Chemical composition and biological activities of Laurus essential oils from different Macaronesian Islands. BIOCHEM SYST ECOL 2014. [DOI: 10.1016/j.bse.2014.04.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Three-dimensional coherent diffractive imaging on non-periodic specimens at the ESRF beamline ID10. JOURNAL OF SYNCHROTRON RADIATION 2014; 21:594-599. [PMID: 24763650 DOI: 10.1107/s1600577514003440] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2013] [Accepted: 02/16/2014] [Indexed: 06/03/2023]
Abstract
The progress of tomographic coherent diffractive imaging with hard X-rays at the ID10 beamline of the European Synchrotron Radiation Facility is presented. The performance of the instrument is demonstrated by imaging a cluster of Fe2P magnetic nanorods at 59 nm 3D resolution by phasing a diffraction volume measured at 8 keV photon energy. The result obtained shows progress in three-dimensional imaging of non-crystalline samples in air with hard X-rays.
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In vitro and in vivo experiments with iron oxide nanoparticles functionalized with DEXTRAN or polyethylene glycol for medical applications: magnetic targeting. J Biomed Mater Res B Appl Biomater 2014; 102:860-8. [PMID: 24458920 DOI: 10.1002/jbm.b.33068] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2013] [Revised: 09/13/2013] [Accepted: 10/20/2013] [Indexed: 01/30/2023]
Abstract
In this research work, DEXTRAN- and polyethylene glycol (PEG)-coated iron-oxide superparamagnetic nanoparticles were synthetized and their cytotoxicity and biodistribution assessed. Well-crystalline hydrophobic Fe3 O4 SPIONs were formed by a thermal decomposition process with d = 18 nm and σ = 2 nm; finally, the character of SPIONs was changed to hydrophilic by a post-synthesis procedure with the functionalization of the SPIONs with PEG or DEXTRAN. The nanoparticles present high saturation magnetization and superparamagnetic behavior at room temperature, and the hydrodynamic diameters of DEXTRAN- and PEG-coated SPIONs were measured as 170 and 120 nm, respectively. PEG- and DEXTRAN-coated SPIONs have a Specific Power Absorption SPA of 320 and 400 W/g, respectively, in an ac magnetic field with amplitude of 13 kA/m and frequency of 256 kHz. In vitro studies using VERO and MDCK cell lineages were performed to study the cytotoxicity and cell uptake of the SPIONs. For both cell lineages, PEG- and DEXTRAN-coated nanoparticles presented high cell viability for concentrations as high as 200 μg/mL. In vivo studies were conducted using BALB/c mice inoculating the SPIONs intravenously and exposing them to the presence of an external magnet located over the tumour. It was observed that the amount of PEG-coated SPIONs in the tumor increased by up to 160% when using the external permanent magnetic as opposed to those animals that were not exposed to the external magnetic field.
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Morphological evaluation of dentin and Y-TZP after short-pulse laser application. Dent Mater 2014. [DOI: 10.1016/j.dental.2014.08.281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Color stability of restorative materials after immersion in different solutions. Dent Mater 2014. [DOI: 10.1016/j.dental.2014.08.134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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3D fusion echocardiography improves 3D left ventricular assessment: comparison with 2D contrast echocardiography. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht311.5864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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A new quantitative method to determine the uptake of SPIONs in animal tissue and its application to determine the quantity of nanoparticles in the liver and lung of Balb-c mice exposed to the SPIONs. J Biomed Nanotechnol 2013; 9:142-5. [PMID: 23627077 DOI: 10.1166/jbn.2013.1467] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
We propose a new method for determining the quantity of superparamagnetic iron oxide nanoparticles (Fe3O4, SPIONs) embedded in animal tissue using magnetization measurements. With this method, the smallest detectable quantity of magnetite nanoparticles in a tissue sample is -1 microg. We showed that this method has proved being efficient. In this study, we focused in determining the quantity of SPION confined in lung and liver tissue of mice injected with -13 nm magnetite superparamagnetic nanoparticles. Furthermore, the method allowed us to detect the magnetite nanoparticles present in animal tissues without letting the natural iron ions present in the tissue or blood interfere with the measurements.
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Understanding electrochemical stability of Cu+ on zeolite modified electrode with Cu-ZSM5. J Electroanal Chem (Lausanne) 2013. [DOI: 10.1016/j.jelechem.2012.12.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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