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

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

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

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.

Establishing thresholds for metal ion levels in patients with bilateral Articular Surface Replacement hip arthroplasty

2018 ◽  
Vol 29 (5) ◽  
pp. 475-480 ◽  
Author(s):  
Gabrielle S Donahue ◽  
Vincent P Galea ◽  
Inari Laaksonen ◽  
James W. Connelly ◽  
Orhun Muratoglu ◽  
...  
Keyword(s):  
Hip Arthroplasty ◽  
Metal Ion ◽  
Articular Surface ◽  
High Specificity ◽  
Hip Resurfacing ◽  
Surface Replacement ◽  
Post Surgery ◽  
Articular Surface Replacement ◽  
Clinical Problems

Introduction: The primary aim of the current study was to determine whether metal ion levels could identify well- from poorly-functioning implants in patients after undergoing bilateral Articular Surface Replacement (ASR) Hip System. The secondary aim was to establish threshold values for Co and Cr that could be used to predict clinical problems in these patients. Materials and methods: The study included 125 patients treated with bilateral ASR hip resurfacing (HRA) and 93 patients treated with bilateral ASR XL total hip arthroplasty (THA) at a mean follow-up of 7.1 years post-surgery. Patients were labelled as well- or poorly-functioning based on strict criteria. We calculated the Co and Cr safe upper ion limits (SUL) for ASR HRA and ASR XL THA separately and assessed these cutoffs ability to predict clinical problems. Results: In patients with bilateral ASR HRA, the well-functioning group had lower ions than the poorly-functioning. In ASR THA patients, there was no difference in blood Co or Cr levels between well- and poorly-functioning implant groups ( p = 0.118 and p = 0.379, respectively). Both Co and Cr could effectively discriminate between well-functioning and poorly-functioning ASR HRA implants ( p < 0.001 and p < 0.001, respectively), but not for ASR THA implants ( p = 0.118 and p = 0.564, respectively). SULs of 4.0 ppb for Co and 4.0 ppb for Cr could differentiate between well- and poorly-functioning implants with high specificity. Conclusions: Metal ion levels are a more reliable tool in MoM HRA than THA when discriminating well- from poorly-functioning implants in bilateral patients. For patients treated with bilateral ASR HRA, ion levels above 4.0 ppb are highly specific for the detection of clinical problems.

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