Aagaardgotfredsen1652

Pollution due to heavy metals is becoming increasingly hazardous; therefore, demand for the large-scale deployment of sensor nodes for water quality monitoring has increased. The development of integrated and miniaturised sensors for detecting heavy metals is necessary. Herein, an integrated microfluidic sensor based on a "glass-silicon-glass" sandwich structure is proposed for Pb2+ detection. This micro-sensor consists of a nanochannel liquid conjunct Ag/AgCl reference electrode(RE), a working electrode with a three-dimensional Au micropillar array, and a detection chamber for sample measurement. The potential fluctuation of the RE in this sensor was only 0.62% over seven days, remaining relatively stable. Under optimal conditions, the limit of detection and sensitivity for lead were 0.13 μg L-1 (S/N = 3) and 52.30 nA (μg L-1)-1, respectively. The linearity of the sensor for detecting lead was good in the concentration range of 0.50-150 μg L-1 (R2 = 0.9989). Moreover, the proposed microsensor showed high selectivity for Pb2+ and achieved sensitive detection of trace Pb2+ in different water samples. Therefore, this integrated and miniaturised sensor is a practical tool for trace lead detection, allowing the development of large scale sensor network for water monitoring.In this study, a clustered carbon aerogel interconnected by carbon balls (CCAI-CB) was prepared as an electrode material to construct a multi-functional electrochemical sensor. CCAI-CB derived from taros (Colocasia esculenta (L). Schott) possesses meso-macroporous structure and plenty of defective sites, and shows notable activity in electrocatalysis as an electrode material. We investigated the application of CCAI-CB modified glassy carbon electrode (CCAI-CB/GCE) for determination of ascorbic acid (AA) and hydrogen peroxide (H2O2). Compared with carbon nanotubes (CNTs) modified GCE (CNTs/GCE) and bare GCE, CCAI-CB/GCE shows lower detection limit (0.23 μM for AA and 1.31 μM, S/N = 3), higher sensitivities (220.53, 148.86 or 94.39 μA mM-1 cm-2 for AA and 83.06 or 49.07 μA mM-1 cm-2 for H2O2). Concentrations of AA and H2O2 in real samples were determined at CCAI-CB/GCE with satisfactory detection results obtained. In addition, when the CCAI-CB/GCE was used for electrocatalysis of other biomolecules, it also exhibits high electrochemical activity. Thus, CCAI-CB could be a promising electrode material for the construction of multi-functional electrochemical sensors.With the increasingly severe international security situation, the application of explosives is more and more extensive, and the probes that can detect the explosives quickly and efficiently have attracted people's attention. In this work, two novel probes T1 and T2 were synthesized through vitamin E succinate and tetraphenylethylene derivative. Fluorescence spectra showed that both T1 and T2 had a typical aggregation-induced emission (AIE) effect in THF/H2O solution, and explosive FOX-7 could effectively quench this fluorescence without being affected by other explosives or ions. The filter paper and cotton rods prepared with these two probes could detect FOX-7 specifically, which also provided the possibility for practical application on the battlefield.The development of analytical methods that allow the simultaneous determination of a wide range of analytes with different properties is one of the focuses of attention in Analytical Chemistry. This work describes a proof-of-concept of the synergistic extraction of a planar paper-based sorptive phase modified with a polyamide such as nylon. This as-prepared sorptive phase enables the extraction of six penicillin-derived antibiotics of different polarity from human saliva samples in the same analysis, since the analytes either interact with the paper or with the nylon. The synthesis of the sorptive phase is simple as it only requires dipping the paper into an organic solution of the polymer (i.e., nylon in formic acid). Then, the modified paper-based sorptive phase is introduced in an Eppendorf tube to perform the extraction of the analytes, and subsequent desorption and measurement by liquid chromatography-tandem mass spectrometry. Under the optimized extraction conditions, the method enables the determination of the analytes in saliva samples with limits of detection from 2.4 to 3.7 ng mL-1. Relative standard deviation (RSD) below 10% for all the target analytes and relative recoveries between 84 and 123% were achieved by using matrix-matched calibration. The results confirm the versatility and the synergistic extraction of the polyamide-coated paper-based sorptive phase, and its potential to be applied in bioanalysis. Moreover, the easy synthesis of the sorptive phase and the low cost of its preparation, as well as the high sample throughput analysis, are some of the main features of the proposed method.

Retrospective cohort.

To evaluate the single assessment numerical evaluation (SANE) as a patient reported outcomes measure (PROM) after anterior cervical discectomy and fusion (ACDF), by comparing to legacy measures.

We included all patients undergoing ACDF with at least one year of follow up with complete PROM data. Patients completed the Neck Disability Index (NDI), the RAND-36 and the EuroQual Five Dimension (EQ-5D) scale, as well as the one-question SANE, pre- and post-operatively. Validity of SANE compared with other PROMs was determined utilizing Pearson's correlation (ρ), proportional bias (B), responsiveness, minimal clinically important difference (MCID) and agreement.

Sixty-nine patients were included. There were moderate-to-strong correlations at a minimum of one-year follow-up between the SANE and NDI (ρ=-0.73, P<0.0001), RAND (ρ=0.80, P<0.0001), and EQ-5D (ρ=-0.66, P<0.0001). No significant proportional bias was found for the SANE when compared to the RAND (B=0.03, p=0.99), NDI (B=-0.003, p=0.99), or EQ-5D (B=-0.0007, p=0.99). Responsiveness for SANE was statistically similar to all other PROMs. The MCID for SANE was determined to be 10.5, with 42% of patients achieving the MCID. Bland-Altman plots demonstrated high agreement between all PROMs.

We found the SANE score provides clinically important patient outcomes data after ACDF, despite only requiring answering one question. The SANE performs comparably to more burdensome health questionnaires. The SANE score may offer spine surgeons the option to easily and quickly collect clinically relevant data on their surgical patients.

We found the SANE score provides clinically important patient outcomes data after ACDF, despite only requiring answering one question. The SANE performs comparably to more burdensome health questionnaires. The SANE score may offer spine surgeons the option to easily and quickly collect clinically relevant data on their surgical patients.

Meningioma incidence increases with age, yet limited data exist on how comorbidities impact complication rates in elderly patients undergoing meningioma resection. The objective of this study was to report surgical outcomes and identify risk factors for perioperative complications.

We performed a retrospective study of patients 75years and older undergoing meningioma resection. Outcomes included survival and complications. Major complications were those requiring surgical intervention or causing permanent neurological deficit. Recursive partitioning, Kaplan-Meier survival, univariate and multi-variate (MVA) analyses were performed.

From 1996 to 2014, 103 patients with a median age of 79years (IQR 77-83years) underwent cranial meningioma resection. Median follow-up was 5.8years (IQR 1.7-8.7years). Median actuarial survival was 10.5years. Complications occurred in 32 patients (31.1%), and 13 patients (12.6%) had multiple complications. Major complications occurred in 16 patients (15.5%). Increasing age wad with meningioma resection in this cohort, there is also excellent long-term survival.The objective of this study is to describe the caregiver burden, as well as the financial burden among caregivers after inpatient and outpatient neurosurgical patients. In this single center, observational study, adult patients undergoing elective inpatient or outpatient neurosurgery (supratentorial tumor resection or lumbar microdiscectomy) and his/her caregiver were recruited for the study. Bakas Caregiving Outcome Scale (BCOS) was used to assess caregiver burden and data was collected from preoperative period until post-operative day (POD) 30. Cost burden was assessed by a cost diary from day of surgery till POD 7. Forty-eight patient-caregiver pairs (21 inpatient craniotomies, 7 outpatient craniotomies, and 20 outpatient microdiscectomies) completed the study. BCOS values were in the negative impact range (60) after POD3. Median BCOS score remained at 60 in outpatient microdiscectomy. 56% of caregiver had at least 1 day of loss of income and 20% lost income throughout first 8 days. learn more Median Cost (in Canadian dollars) associated with caregiving ranged from C$57 to C$250 amongst different groups. We concluded that caring for patients after craniotomy is psychologically demanding which leads to an increase in caregiver burden. In addition, there is a cost burden for the care givers in the form of missed workdays and additional direct expenses. Further studies are needed to recognize this problem and address the burden among the caregivers in the neurosurgical population.

The coexistence of intracranial arteriovenous malformation (AVM) and meningioma in a single patient is seldom reported, so the clinical profile, optimal management, and outcomes of these patients are mostly unknown.

We performed a systematic review of the SCOPUS and PubMed databases for case reports and case series on patients with both intracranial AVMs and meningiomas. Data on demographics, clinical characteristics, surgical management, and outcomes were collected.

A total of 18 cases were reported in the literature, including the present case. The mean age at presentation was 54years (range of 15-70years), with no gender predilection. Most of the meningiomas and AVMs were frontal in location, and more than half of the lesions were contiguous. The most common presenting symptoms were seizures (67%), headache (44%), and weakness (33%). Majority of the patients underwent single stage meningioma and AVM excision (44%), followed by staged meningioma excision then AVM excision (17%) and meningioma excision only (17%). In all, 94% (17/18) of the meningiomas were excised compared to 72% (13/18) of the AVMs. Outcomes were reported in 15 patients; 80% were favorable, but there were 2 deaths and 1 tumor recurrence after 5years.

The coexistence of an intracranial AVM with a meningioma is recognized but rarely reported in the literature. Individualized treatment should be employed in managing patients with concurrent lesions, and outcomes are generally favorable due to the benign nature of both these entities.

The coexistence of an intracranial AVM with a meningioma is recognized but rarely reported in the literature. Individualized treatment should be employed in managing patients with concurrent lesions, and outcomes are generally favorable due to the benign nature of both these entities.