scholarly journals Miniaturized soft centrifugal pumps with magnetic levitation for fluid handling

2021 ◽  
Vol 7 (44) ◽  
Author(s):  
Mingxing Zhou ◽  
Zhijie Qi ◽  
Zhiqiang Xia ◽  
Ya Li ◽  
Wei Ling ◽  
...  
Keyword(s):  
Magnetic Levitation ◽  
Centrifugal Pumps ◽  
Fluid Handling

scholarly journals Magnetic levitation pump versus constrained vortex pump: a pilot study on the hemolysis effect during minimal invasive extracorporeal circulation

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Ignazio Condello ◽  
Giuseppe Santarpino ◽  
Giuseppe Filiberto Serraino ◽  
Pasquale Mastroroberto ◽  
Giuseppe Speziale ◽  
...  
Keyword(s):  
Pilot Study ◽  
Minimally Invasive ◽  
Postoperative Period ◽  
Extracorporeal Circulation ◽  
Magnetic Levitation ◽  
Control Group ◽  
Study Group ◽  
Centrifugal Pumps ◽  
Free Hemoglobin ◽  
Centrifugal Blood Pump

Abstract Background Elevated plasma free hemoglobin is associated with multi-organ injury. In this context, minimally invasive extracorporeal technologies represent a way to reduce this complication following cardiac surgery. Methods We present a pilot study focused on plasma free hemoglobin levels in 40 patients undergoing isolated coronary artery bypass grafting (CABG). The same circuits for minimally invasive extracorporeal circulation (MiECC) were used in all patients. The ECMOLIFE magnetic levitation pump was used in the study group (n = 20), and the AP40 Affinity CP centrifugal blood pump was used in the control group (n = 20). Results In the immediate postoperative period, plasma free hemoglobin (PFH) and lactate dehydrogenase (LDH) were significantly lower in the study group than in the control group (10.6 ± 0.7 vs 19.9 ± 0.3 mg/dL, p = 0.034; and 99.16 ± 1.7 vs 139.17 ± 1.5 IU/L, p = 0.027, respectively). Moreover, patients treated with the magnetic levitation pump showed lower creatinine and indirect bilirubin (0.92 vs 1.29 mg/dL, p = 0.030 and 0.6 ± 0.4 vs 1.5 ± 0.9 mg/dL, p = 0.022, respectively) at 24 h after the procedure, and received fewer transfusions during the whole postoperative period (3 vs 9 red blood cell units (RBC), p = 0.017). Conclusion Our pilot study suggests that the use of magnetically levitated centrifugal pumps for extracorporeal circulation support is associated with a lower risk of hemolysis, though larger studies are warranted to confirm our results.

Improved Outcome of Cardiac Extracorporeal Membrane Oxygenation in Infants and Children Using Magnetic Levitation Centrifugal Pumps

2015 ◽  
Vol 40 (1) ◽  
pp. 27-33 ◽  
Author(s):  
Giovanni Battista Luciani ◽  
Stiljan Hoxha ◽  
Salvatore Torre ◽  
Alessio Rungatscher ◽  
Tiziano Menon ◽  
...  
Keyword(s):  
Extracorporeal Membrane Oxygenation ◽  
Magnetic Levitation ◽  
Infants And Children ◽  
Centrifugal Pumps ◽  
Membrane Oxygenation ◽  
In Infants And Children ◽  
Improved Outcome

scholarly journals Sealed and Delivered

1999 ◽  
Vol 121 (10) ◽  
pp. 63-65
Author(s):  
Ray Clark ◽  
Henri Azibert ◽  
Lanre Oshinowo
Keyword(s):  
Heat Removal ◽  
Mechanical Seals ◽  
Centrifugal Pumps ◽  
Innovative Design ◽  
Surface Design ◽  
Seal Design ◽  
Fluid Handling ◽  
Physical Experiments ◽  
Outer Pair ◽  
Computational Fluid Dynamics Cfd

Engineers at A.W Chesterton Co., Stoneham, MA, applied computational fluid dynamics (CFD) to a new model of their heavy-duty cartridge dual seal Chesterton's dual seal consists of two pairs of seal rings. Mechanical seals are widely used to prevent leakage from fluid-handling equipment such as centrifugal pumps and mixers. Outer pair rotates with the shaft; inner pairs are fixed and contain a channel for the barrier fluid. The seal confines process fluids to the areas on the left. Taper is visible along the lower edge of the inner seal rings and on the corresponding surface of the shaft covering. CFD images described in the article depict the axial circulation of the seal's barrier fluid for a typical untapered seal design and the improved circulation resulting from the tapered surface design. The change in flow patterns results in an improvement in heat removal, from 0.7 to 1.1 kW. In order to validate the accuracy of the CFD results, physical experiments were conducted in Chesterton's seal test laboratory, using a variety of flow rates, rotation speeds, and fluids. The seals that do incorporate the innovative design have performed well in the field, operating at cooler temperatures that should result in seal life at least 30 percent longer,

Short-term hemodynamic support with bearingless, magnetically levitated paracorporal centrifugal pumps

2009 ◽  
Vol 56 (S 01) ◽  
Author(s):  
JFM Bechtel ◽  
EI Charitos ◽  
T Hanke ◽  
M Misfeld ◽  
C Schmidtke ◽  
...  
Keyword(s):  
Centrifugal Pumps ◽  
Short Term ◽  
Hemodynamic Support ◽  
Magnetically Levitated

A Micro Conveyance Actuator based on Superconducting Magnetic Levitation

1999 ◽  
Vol 119 (8-9) ◽  
pp. 417-423 ◽  
Author(s):  
Iizuka Tetsuhiko ◽  
Fujita Hiroyuki
Keyword(s):  
Magnetic Levitation

Withdrawal: New Impeller Shrouds to Improve Hydrodynamic Performance of Centrifugal Pumps: Experimental and Numerical Evaluations

2020 ◽  
Author(s):  
Hamidreza Bozorgasareh ◽  
Mohammad Jafari ◽  
Javad Khalesic ◽  
Heshmat Olah Gazori ◽  
Mostafa Hassanalian
Keyword(s):  
Hydrodynamic Performance ◽  
Centrifugal Pumps
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