Tag: nevin manimala

J Biomed Opt. 2022 Feb;27(8). doi: 10.1117/1.JBO.27.8.083009.

ABSTRACT

SIGNIFICANCE: Diffuse correlation spectroscopy (DCS) is an optical technique that measures blood flow non-invasively and continuously. The time-domain (TD) variant of DCS, namely, TD-DCS has demonstrated a potential to improve brain depth sensitivity and to distinguish superficial from deeper blood flow by utilizing pulsed laser sources and a gating strategy to select photons with different pathlengths within the scattering tissue using a single source-detector separation. A quantitative tool to predict the performance of TD-DCS that can be compared with traditional continuous wave DCS (CW-DCS) currently does not exist but is crucial to provide guidance for the continued development and application of these DCS systems.

AIMS: We aim to establish a model to simulate TD-DCS measurements from first principles, which enables analysis of the impact of measurement noise that can be utilized to quantify the performance for any particular TD-DCS system and measurement geometry.

APPROACH: We have integrated the Monte Carlo simulation describing photon scattering in biological tissue with the wave model that calculates the speckle intensity fluctuations due to tissue dynamics to simulate TD-DCS measurements from first principles.

RESULTS: Our model is capable of simulating photon counts received at the detector as a function of time for both CW-DCS and TD-DCS measurements. The effects of the laser coherence, instrument response function, detector gate delay, gate width, intrinsic noise arising from speckle statistics, and shot noise are incorporated in the model. We have demonstrated the ability of our model to simulate TD-DCS measurements under different conditions, and the use of our model to compare the performance of TD-DCS and CW-DCS under a few typical measurement conditions.

CONCLUSION: We have established a Monte Carlo-Wave model that is capable of simulating CW-DCS and TD-DCS measurements from first principles. In our exploration of the parameter space, we could not find realistic measurement conditions under which TD-DCS outperformed CW-DCS. However, the parameter space for the optimization of the contrast to noise ratio of TD-DCS is large and complex, so our results do not imply that TD-DCS cannot indeed outperform CW-DCS under different conditions. We made our code available publicly for others in the field to find use cases favorable to TD-DCS. TD-DCS also provides a promising way to measure deep brain tissue dynamics using a short source-detector separation, which will benefit the development of technologies including high density DCS systems and image reconstruction using a limited number of source-detector pairs.

PMID:35199501 | DOI:10.1117/1.JBO.27.8.083009

United European Gastroenterol J. 2022 Feb 24. doi: 10.1002/ueg2.12207. Online ahead of print.

ABSTRACT

BACKGROUND: Identifying branch-duct intraductal papillary mucinous neoplasms (BD-IPMNs) at lowest risk of progression may allow for a reduced intensity of surveillance.

OBJECTIVE: We aimed to externally validate the previously developed Dutch-American Risk stratification Tool (DART-1; https://rtools.mayo.edu/DART/), which identifies cysts at low risk of developing worrisome features (WFs) or high-risk stigmata (HRS).

METHODS: Three prospective cohorts of individuals under surveillance for BD-IPMNs were combined, independent from the original development cohort. We assessed the performance (discrimination and calibration) of DART-1, a multivariable Cox-proportional logistic regression model with five predictors for the development of WFs or HRS.

RESULTS: Of 832 individuals (mean age 77 years, SD 11.5) under surveillance for a median of 40 months (IQR 44), 163 (20%) developed WFs or HRS. DART-1’s discriminative ability (C-statistic 0.68) was similar to that in the development cohort (0.64-0.72) and showed moderate calibration. DART-1 adequately estimated the risk for patients in the middle risk quintile, and slightly underestimated it in the lowest quintiles. Their range of predicted versus observed 3-year risk was 0%-0% versus 0%-3.7% for Q1; 0.3%-0.4% versus 3%-11% for Q2; and 2.6%-3% versus 2.4%-9.8% for Q3. The development of WFs or HRS was associated with pancreatic cancer (p < 0.001). Vice versa, in absence of WFs or HRS, the risk of malignancy was low (0.3%).

CONCLUSIONS: The performance of DART-1 to predict the development of WFs or HRS in BD-IPMN was validated in an external international cohort, with a discriminative ability equal as in the development cohort. Risk estimations were most accurate for patients with BD-IPMNs in the middle risk quintile and slightly underestimated in the lowest quintiles.

PMID:35199484 | DOI:10.1002/ueg2.12207

Clin Exp Dent Res. 2022 Feb 24. doi: 10.1002/cre2.503. Online ahead of print.

ABSTRACT

OBJECTIVE: Wiskott-Aldrich syndrome (WAS) is a rare X-linked primary immunodeficiency, characterized by micro-thrombocytopenia, recurrent infections, and eczema. This study aims to describe common oral manifestations and evaluate oral microbioma of WAS patients.

MATERIAL AND METHODS: In this cohort study, 11 male WAS patients and 16 male healthy controls were evaluated in our Center between 2010 and 2018. Data about clinical history, oral examination, Gingival Index (GI) and Plaque Index (PI) were collected from both groups. Periodontal microbiological flora was evaluated on samples of the gingival sulcus.

RESULTS: WAS subjects presented with premature loss of deciduous and permanent teeth, inclusions, eruption disturbance, and significantly worse GI and PI. They also showed a trend toward a higher total bacterial load. Fusobacterium nucleatum, reported to contribute to periodontitis onset, was the most prevalent bacteria, together with Porphyromonas gingivalis and Tannerella forsythia.

CONCLUSIONS: Our data suggest that WAS patients are at greater risk of alterations in the oral cavity. The statistically higher incidence of periodontitis and the trend to higher prevalence of potentially pathological bacterial species in our small cohort, that should be confirmed in future in a larger population, underline the importance of dentistry monitoring as part of the multidisciplinary management of WAS patients.

PMID:35199474 | DOI:10.1002/cre2.503

Int J Rheum Dis. 2022 Feb 23. doi: 10.1111/1756-185X.14307. Online ahead of print.

ABSTRACT

AIM: S-flurbiprofen plaster (SFPP) is a novel topical nonsteroidal anti-inflammatory drug (NSAID) patch. This study aimed to assess the efficacy and safety of SFPP in knee osteoarthritis (OA) patients compared to diclofenac gel.

METHODS: This study was a multicenter, randomized, active-controlled, open-label, non-inferiority phase III trial. There were 311 enrolled patients treated by SFPP or diclofenac gel for 2 weeks. The primary efficacy outcome was the knee pain when rising from the specially arranged chair assessed by visual analog scale (rVAS). The other efficacy outcomes were clinical symptoms, pain on walking, global assessment by both investigator and patient, and use/non-use of the rescue drugs during the treatment period. Adverse events (AEs) were evaluated as the safety outcome.

RESULTS: The least-squares mean (95% CI) of ΔrVAS at the end of the study was 41.52 (39.16-43.88) mm in the SFPP group and 36.01 (33.69-38.33) mm in the diclofenac gel group, with a between-group difference of 5.51 (2.20-8.82), indicating non-inferiority. There were statistically significant differences between the groups in rVAS, clinical symptoms, pain on walking, and the global assessment by both investigator and patient. The incidence rate of AEs in the SFPP group was 5.8%, and there was no statistically significant difference from that in the diclofenac gel group (5.2%). Most of the AEs were mild, and no AE led to discontinuation.

CONCLUSION: Non-inferiority of SFPP to diclofenac gel was demonstrated in the efficacy for pain on rising from a chair. SFPP was also well-tolerated in knee OA patients.

PMID:35199483 | DOI:10.1111/1756-185X.14307

BJU Int. 2022 Feb 23. doi: 10.1111/bju.15718. Online ahead of print.

ABSTRACT

OBJECTIVE: To introduce a wireless high-definition endoscopic system (WHES) and compare it with a Storz HD system in image resolution, color resolution, weight and costs.

MATERIALS AND METHODS: The WHES incorporated a portable LED light source and a wireless camera module, which could be compatible with different types of endoscopes. Images were wirelessly transmitted to a monitor or mobile platform such as smartphone through a receiver. The ISO 12233 resolution chart image was used for the comparison of image resolution and Munsell Color Checker Chart for color resolution. 38 endourologists used a Likert questionnaire to blindly evaluate cystoscopic images from a patient with hematuria. The surgical team was inquired about the overall performance of WHES in twenty laparoscopic adrenalectomies by a nonvalidated subjective survey.

RESULTS: there was no difference in image resolution between the two systems (5.82 vs 5.89 lp/mm). Without lens and respective light sources, there were better purple (ΔE=21.48 vs 28.73), blue (ΔE=34.88 vs 38.6) and red color resolution (ΔE=29.01 vs 35.45) for the camera of WHES (P<0.05), but orange (ΔE=43.45 vs 36.52) and yellow (ΔE=52.7 vs 35.93) resolution were better for the Storz HD camera (P<0.05). Comparing WHES to a Storz laparoscopic system, the Storz system still presented better resolution of orange and yellow, and the resolution of purple, blue and red was similar for the two systems. The expert comments of resolution, brightness, color for cystoscopy were not statistically different, but the ergonomics scores of WHES was higher (3.7 vs 3.33, P=0.038). The overall expense of WHES was $23000-25000 compared with $45000-50000 for a Storz system. There were 100% general satisfaction for WHES in the survey.

CONCLUSION: We developed a new WHES represented the same resolution images and acceptable color resolution with the advantages of wireless connection, small volume, low cost, portability and high-speed wireless transmission.

PMID:35199469 | DOI:10.1111/bju.15718

Nurs Health Sci. 2022 Feb 23. doi: 10.1111/nhs.12932. Online ahead of print.

ABSTRACT

Although active learning methodologies promote students’ creativity and motivation regarding learning objectives, traditional unidirectional teaching methods remain more common. The objective of this study was to determine nursing students’ perceptions regarding the efficacy of narrative photography as a learning method, including self-perceived satisfaction. Narrative photography is an art-based technique inspired by Photovoice that promotes empathy, creativity, and reflection. A cross-sectional study was conducted using a non-probabilistic sample of 66 nursing students from a public university in Barcelona (Spain). Quantitative and qualitative data were collected anonymously using an electronic tool. Descriptive statistics and thematic analyses were used to analyze the data. Sixty valid questionnaires were returned. The respondents found narrative photography’s ability to promote creativity and assist understanding of theory to be its most satisfying aspect (>95% somewhat/totally agree). Meanwhile, narrative photography’s usefulness, ability to foster self-criticism, and the associated workload was the least satisfactory aspect (>55% somewhat/totally agree). Significant differences regarding satisfaction levels were found for both age and sex. Narrative photography is a helpful and satisfactory learning method, especially for promoting creativity and understanding theoretical concepts.

PMID:35199453 | DOI:10.1111/nhs.12932

J Clin Nurs. 2022 Feb 23. doi: 10.1111/jocn.16257. Online ahead of print.

ABSTRACT

AIM AND OBJECTIVES: This study investigated the incidence of thirst and contributing factors in intensive care unit (ICU) patients by analysing differences in physiologic, psychological, and disease- and environment-related parameters in ICU patients with vs without thirst.

BACKGROUND: Little is known about the factors that influence thirst, and there are no standardised methods for identifying at-risk patients in the ICU. Previous studies generalised the risk of thirst in ICU patients because of a lack of data on relevant variables. Here, we examined the factors contributing to thirst based on symptom management theory.

DESIGN: Prospective descriptive design.

METHODS: Physiologic, psychological, disease-related and environment-related data were collected for 301 patients from 4 ICUs (medical, surgical, cardiac and emergency ICUs) of a hospital from 15 December 2017-10 July 2019 through a screening interview, questionnaires and from electronic medical records. The data were analysed with descriptive statistics, the t-test and chi-squared test, and by logistic regression. Binary stepwise logistic regression was used to identify thirst-associated factors. The findings are reported according to the STROBE checklist for cross-sectional studies.

RESULTS: In total, 210/301 (69.8%) ICU patients experienced thirst. Risk factors were nil per os order (odds ratio [OR] = 4.10, 95% confidence interval [CI]: 1.44-11.69), surgery (OR = 2.96, 95% CI: 1.11-7.93), high glucose (OR = 3.36, 95% CI: 1.01-11.17) and greater disease severity (OR = 1.13, 95% CI: 1.02-1.24).

CONCLUSION: Thirst is common in ICU patients. Timely detection of patients’ thirst and identification of those at high risk by ICU nurses can ensure the implementation of effective and safe interventions.

RELEVANCE TO CLINICAL PRACTICE: The results of this study highlight the need to evaluate thirst symptoms in patients with severe disease and develop relief strategies for fasting, perioperative, and hyperglycaemic patients and others who are at high risk of thirst.

PMID:35199411 | DOI:10.1111/jocn.16257

Oral Dis. 2022 Feb 24. doi: 10.1111/odi.14168. Online ahead of print.

ABSTRACT

OBJECTIVES: To evaluate the prognostic and locoregional metastatic features of carcinoma ex pleomorphic adenoma of submandibular gland (SMG-CXPA) and improve the understanding of this uncommon condition.

PATIENTS AND METHODS: We retrospectively reviewed patients who were diagnosed with SMG-CXPA. The survival data of SMG-CXPA patients were statistically analyzed using Cox regression and Kaplan-Meier method. The associations between cervical metastasis and clinicopathological parameters were evaluated using chi-squared test. Additionally, two different histological categories (histological grade and invasiveness) and their combination were evaluated with the Kaplan-Meier method and receiver operating characteristic curves.

RESULTS: In total, 86 patients were diagnosed: 38 clinically node-negative, 31 pathologically node-negative and 17 node-positive patients. Clinical tumor stage and histological grade were two independent prognostic factors for SMG-CXPA. There were significant correlations between sex, tumor size, clinical tumor stage, clinical lymph node stage, histological grade, invasiveness, malignant components, perineural invasion and no specific criteria exist for the clinical outcome.

CONCLUSION: SMG-CXPA is a high-grade malignancy with an unfavorable prognosis. Elective neck dissection should be performed in SMG-CXPA patients with a risk of locoregional metastasis. Histological grade seems to be a more valuable predictor of lymph node involvement than invasiveness.

PMID:35199423 | DOI:10.1111/odi.14168

J Appl Toxicol. 2022 Feb 23. doi: 10.1002/jat.4309. Online ahead of print.

ABSTRACT

Cardiotoxicity is a serious adverse effect of an anticancer drug, doxorubicin (DOX), which can occur within a year or decades after completion of therapy. The present study was designed to address a knowledge gap concerning a lack of circulating biomarkers capable of predicting the risk of cardiotoxicity induced by DOX. Profiling of 2083 microRNAs (miRNAs) in mouse plasma revealed 81 differentially expressed miRNAs one week after 6, 9, 12, 18, or 24 mg/kg total cumulative DOX doses (early-onset model) or saline (SAL). Among these, the expression of 7 miRNAs were altered prior to the onset of myocardial injury at 12 mg/kg and higher cumulative doses. The expression of only miR-34a-5p was significantly (FDR<0.1) elevated at all total cumulative doses compared to concurrent SAL-treated controls and showed a statistically significant dose-related response. The trend in plasma miR-34a-5p expression levels during DOX exposures also correlated with a significant dose-related increase in cardiac expression of miR-34a-5p in these mice. Administration of a cardioprotective drug, dexrazoxane, to mice before DOX treatment, significantly mitigated miR-34a-5p expression in both plasma and heart in conjunction with attenuation of cardiac pathology. This association between plasma and heart may suggest miR-34a-5p as a potential early circulating marker of early-onset DOX cardiotoxicity. In addition, higher expression of miR-34a-5p (FDR<0.1) in plasma and heart compared to SAL-treated controls 24 weeks after 24 mg/kg total cumulative DOX dose, when cardiac function was altered in our recently established delayed-onset cardiotoxicity model, indicated its potential as an early biomarker of delayed-onset cardiotoxicity.

PMID:35199358 | DOI:10.1002/jat.4309

J Obstet Gynaecol Res. 2022 Feb 23. doi: 10.1111/jog.15141. Online ahead of print.

ABSTRACT

BACKGROUND: Polycystic ovary syndrome (PCOS) is one of the most prevalent endocrine disorders in females of reproductive age, with a prevalence of 20%-33% in the general population. Interleukin (IL)-34 is a recently explored proinflammatory cytokine and is an important modulator in different disease types. However, the function of IL-34 in PCOS has yet to be investigated.

OBJECTIVE: The purpose of this study was to determine the IL-34 serum level in women with PCOS and to compare it to that of a relatively healthy control group. Focusing on its relationship with IL-6, TNF-α, and IL-1β and homeostatic model assessment for insulin resistance (HOMA-IR), triglyceride, and low-density lipoprotein cholesterol (LDL-C).

MATERIALS AND METHODS: In this study, blood samples were obtained from 100 women with PCOS and 100 healthy control women for the purpose of estimating their serum levels of IL-34, IL-6, TNF-α, and IL-1β using the enzyme-linked immunosorbent assay technique.

RESULTS: Serum levels of IL-34, IL-6, TNF-α, and IL-1β were all higher in PCOS women than in healthy controls, and the difference was highly statistically significant. Serum IL-34 concentration was positively correlated with IL-6, TNF-α, and IL-1β concentration. Additionally, serum concentrations of IL-34 were positively correlated with HOMA-IR, triglyceride, and LDL-C.

CONCLUSION: When compared to normal women, IL-34, IL-6, TNF-α, and IL-1β levels were highly statistically significant in PCOS, and these high levels were associated with other cytokines (IL-6, TNF-α, and IL-1β), HOMA-IR, triglyceride, and LDL-C.

PMID:35199410 | DOI:10.1111/jog.15141