scholarly journals A pediatric case of extrapontine myelinolysis due to rapid fluctuation of sodium concentration after craniopharyngioma surgery

2021 ◽  
Vol 28 (3) ◽  
pp. 227-229
Author(s):  
Yuto Matsuoka ◽  
Makiko Tani ◽  
Kazuyoshi Shimizu ◽  
Tomoyuki Kanazawa ◽  
Tomotsugu Ichikawa ◽  
...  
Keyword(s):  
Sodium Concentration ◽  
Pediatric Case ◽  
Extrapontine Myelinolysis ◽  
Rapid Fluctuation

SURVEY IN SERUM ADH CONCENTRATION IN TRAUMATIC BRAIN INJURY PATIENTS

2014 ◽  
pp. 83-89
Author(s):  
Dung Ngo ◽  
Thi Nhan Nguyen ◽  
Khanh Hoang
Keyword(s):  
Traumatic Brain Injury ◽  
Brain Injury ◽  
Osmotic Pressure ◽  
Negative Correlation ◽  
Closed Head Injury ◽  
Serum Levels ◽  
Sodium Concentration ◽  
Plasma Sodium ◽  
Plasma Sodium Concentration ◽  
Closed Head

Objective: Study on 106 patients with closed head injury, assessment of serum ADH concentration, correlation with Glasgow score, sodium and plasma osmotic pressure. Patients and methods: Patients with closed head injuries were diagnosed determined by computerized tomography, admitted to the Hue Central Hospital 72 hours ago. Results: (i) Serum concentration of ADH 42.21 ± 47.80 pg/ml. (ii) There is a negative correlation between serum levels of ADH with: (1) Glasgow point r = -0.323, p <0.01; (2) Plasma sodium concentration r = - 0.211, p > 0.05; (3) Plasma osmotic pressure r = - 0.218, p> 0.05. Conclusion: There is a negative correlation between serum levels of ADH with Glasgow scale, plasma sodium concentration and osmotic pressure in plasma. Key words: ADH traumatic brain injury.

Flame Photometry Characterization Procedure for Sodium Content in Brazilian Bentonites for Nanotechnology Applications

2019 ◽  
Vol 12 (2) ◽  
pp. 122-129
Author(s):  
Hellen S. Santos ◽  
Karine L. Buarque da Silva ◽  
Ariel E. Zanini ◽  
Danilo S. Coelho ◽  
Marcelo Embiruçu ◽  
...  
Keyword(s):  
Control Process ◽  
Sodium Concentration ◽  
High Water ◽  
Sodium Content ◽  
Industrial Applications ◽  
Exchange Capacity ◽  
Sodium Cation ◽  
Flame Photometry ◽  
Logarithmic Scale ◽  
Average Value

Background: Brazilian bentonites have a low sodium concentration in their interlayer structure. This is a problem with most of the industrial applications that demand the characteristics of sodium bentonites. Objective: As a solution for this limitation, sodium carbonate is added to in natura clays, promoting ion exchange between other interlayer cations with sodium. Methods: A process was used based on the principle of Stokes’ Law (BR Patent 10 2013 016298). For this, we used four glass columns in series, in which a high water flow was considered to obtain purified clays. It was proposed as a simple, fast and economical method for sodium determination that was developed and applied in bentonites by flame photometry. The equipment calibration was performed with a NaCl standard solution in concentrations between 80 and 110 ppm. The bentonites in the suspension were separated by means of centrifugation, being thus analyzed by a flame photometer. Results: The samples were prepared according to the manufacturer’s specifications to contain detectable amounts of sodium by means of flame photometry. A resulting linear relationship between the average value readings versus sodium standard content solution (both in ppm) was obtained by the logarithmic scale, as expected. Conclusion: The procedure allowed to define a method that could be used in the sodification control process, thus making it possible to differentiate the sodium cation content in terms of the value of cation exchange capacity (CEC) from bentonite. X-ray analysis of in natura and the sodified clays showed nanostructural differences related to interlayer distance.

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