Quality, but not quantity of physical activity is associated with metal ion concentrations in unilateral hip resurfacing

2020 ◽  
Vol 38 (10) ◽  
pp. 2206-2212
Author(s):  
Jetse Jelsma ◽  
Martijn G. M. Schotanus ◽  
Sander M. J. Kuijk ◽  
Ivo T. A. F. Buil ◽  
Ide C. Heyligers ◽  
...  
Keyword(s):  
Physical Activity ◽  
Metal Ion ◽  
Hip Resurfacing ◽  
Ion Concentrations

Do Hardened Femoral Heads Reduce Blood Metal Ion Concentrations after Hip Resurfacing?

2014 ◽  
Vol 24 (4) ◽  
pp. 327-332 ◽  
Author(s):  
Michel J. Le Duff ◽  
Alicia J. Johnson ◽  
Harlan C. Amstutz
Keyword(s):  
Metal Ion ◽  
Hip Resurfacing ◽  
Ion Concentrations ◽  
Femoral Heads

Blood metal ion concentrations after hip resurfacing arthroplasty

2009 ◽  
Vol 91-B (10) ◽  
pp. 1287-1295 ◽  
Author(s):  
D. J. Langton ◽  
A. P. Sprowson ◽  
T. J. Joyce ◽  
M. Reed ◽  
I. Carluke ◽  
...  
Keyword(s):  
Metal Ion ◽  
Hip Resurfacing ◽  
Hip Resurfacing Arthroplasty ◽  
Ion Concentrations ◽  
Resurfacing Arthroplasty

Metal ion concentrations after metal-on-metal hip arthroplasty are not correlated with habitual physical activity levels

2018 ◽  
Vol 29 (6) ◽  
pp. 638-646 ◽  
Author(s):  
Jetse Jelsma ◽  
Martijn GM Schotanus ◽  
Rachel Senden ◽  
Ide C Heyligers ◽  
Bernd Grimm
Keyword(s):  
Physical Activity ◽  
At Risk ◽  
Daily Living ◽  
Metal Ion ◽  
Hip Prosthesis ◽  
Habitual Physical Activity ◽  
Activity Levels ◽  
Ion Concentrations ◽  
Metal On Metal ◽  
Physical Activity Levels

Introduction: Metal-on-metal (MoM) hip arthroplasties have shown high clinical failure rates with many patients at risk for a revision and under surveillance for high metal ion concentrations. Implant wear releasing such ions is assumed to be a function of use, i.e. the patient’s physical activity. This study aimed to assess whether habitual physical activity levels of MoM patients are correlated with metal ion concentrations and are higher in patients with high (at risk) than in patients with low (safe) metal ion concentrations. Methods: A cohort study was conducted of patients with any type of MoM hip prosthesis. Metal ion concentrations were determined using ICP-MS. Habitual physical activity of subjects was measured in daily living using an acceleration-based activity monitor. Outcome consisted of quantitative and qualitative activity parameters. Results: In total, 62 patients were included. Mean age at surgery was 60.8 ± 9.3 years and follow-up was 6.3 ± 1.4 years. Cobalt concentrations were highly elevated overall (112.4 ± 137.9 nmol/L) and significantly more in bilateral (184.8 ± 106.5 nmol/L) than in unilateral cases (87.8 ± 139.4 nmol/L). No correlations were found between physical activity parameters and metal ion concentrations. Subgroup analysis of patients with low versus high cobalt concentration showed no significant differences in habitual physical activity. Discussion: No correlation was found between physical activity levels and metal ion concentrations. Implant use by normal habitual activities of daily living seems not to influence metal ion concentrations.

scholarly journals Predicting High Blood Metal Ion Concentrations following Hip Resurfacing

2015 ◽  
Vol 25 (6) ◽  
pp. 510-519 ◽  
Author(s):  
Gulraj S. Matharu ◽  
Fiona Berryman ◽  
Lesley Brash ◽  
Paul B. Pynsent ◽  
Ronan B.C. Treacy ◽  
...  
Keyword(s):  
Metal Ion ◽  
Hip Resurfacing ◽  
Ion Concentrations

Prediction of Soluble Nickel Removal by Activated Sludge Using Free Metal Ion Concentrations

1987 ◽  
Vol 19 (3-4) ◽  
pp. 439-448 ◽  
Author(s):  
Jeppe S. Nielsen ◽  
Steve E. Hrudey ◽  
Frederick F. Cantwell
Keyword(s):  
Activated Sludge ◽  
Metal Ion ◽  
Municipal Sewage ◽  
Nickel Ion ◽  
Ion Concentrations ◽  
Untreated Sewage ◽  
Nickel Uptake ◽  
Nickel Removal ◽  
Free Metal ◽  
Free Metal Ion

Batch isotherm studies using spiked sewage samples containing a range of total soluble nickel concentrations typical of municipal sewage strongly suggested that it is the free (i.e. uncomplexed) nickel ion that is sorbed by activated sludge. Equations relating nickel uptake by activated sludge to free nickel ion concentrations and the extent of complexation in untreated sewage were developed and applied. Predicted and measured nickel removals generally agreed to within ± 30%.

scholarly journals Uncommon biphasic behaviour induced by very high metal ion concentrations in HCl/H2O/[P44414]Cl and HCl/H2O/PEG-600 systems

2020 ◽  
Vol 22 (40) ◽  
pp. 23226-23236
Author(s):  
Eris Sinoimeri ◽  
Victor Maia Fernandes ◽  
Jérôme Cognard ◽  
Jorge Fernando Brandão Pereira ◽  
Lenka Svecova ◽  
...  
Keyword(s):  
Metal Ion ◽  
Ion Concentrations ◽  
System P ◽  
High Metal ◽  
Very High ◽  
Peg 600

Large amounts of Fe(iii) or Fe(ii) strongly modify the biphasic behavior of the system P44414Cl/HCl/H2O while large amounts of Fe(iii) induce a biphasic regime for the mixture PEG-600/HCl/H2O.

scholarly journals Pre-treatment of desalination feed seawater by Jordanian Tripoli, Pozzolana, and Feldspar: Batch experiments

2011 ◽  
Vol 17 (2) ◽  
pp. 163-171 ◽  
Author(s):  
Aiman Al-Rawajfeh ◽  
Khaldoon Al-Whoosh ◽  
Dwairi Al ◽  
Ahmad Al-Maaberah ◽  
Amer Tarawneh
Keyword(s):  
Layered Double Hydroxide ◽  
Metal Ion ◽  
Raw Materials ◽  
Batch Experiments ◽  
Initial Concentration ◽  
Considerable Potential ◽  
Ion Concentrations ◽  
Pre Treatment ◽  
Co Precipitation ◽  
Double Hydroxide

In this research, composites of layered double hydroxide (LDH) with three Jordanian natural raw materials; Tripoli (T), Pozzolana (P) and Feldspar (F) were prepared by co-precipitation and have been used for feed seawater pre-treatment. The data reveals that percent adsorption decreased with increase in initial concentration, but the actual amount of adsorbed ions per unit mass of LDH/T-P-F increased with increase in metal ion concentrations. The values of ?Go were negative and within 21 to 26 KJ/mol, while the values of ?Ho and ?So were positive and within the range of 0.1 to 25 KJ/mol. The values of ?H?, ?S?, and ?G? indicate the favorability of physisorption and show that the LDH/T-P-F composites have a considerable potential as adsorbents for the removal of ions from seawater.

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