Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 22 for “"blood pump"”.
-
Microcomputer control of a pneumatic blood pump
… of a dual chamber, diaphragm-type pneumatic blood pump in both open-loop and closed-loop modes. The open-loop mode of operation allows selection of pumping rate and systolic time parameters. The closed-loop mode of operation allows selection of pumping rate and pump output parameters, with …
-
Analysis of a membrane type blood oxygenator and a ventricle type blood pump
… and in vitro analysis of the Arp Hembrane Type Blood Oxygenator and a ventricle type blood pump. The system is designed for newborns suffering from Respiratory Distress Syndrome (R.D.S.), especially the 15% who are unable to be helped by the Arp Infant Respirator. The analysis included oxygen …
-
A new blood pump and oxygenator system for support of infants with neonatal respiratory distress: preliminary in vitro and in vivo evaluation
A clinical need exists for a blood oxygenator and pumping system for the support of neonates with respiratory deficiencies. Such systems now available for support of adults are not suitable for neonatal patients. In vitro evaluation of a new blood oxygenator and blood pumping system was performed. …
-
A novel magnetically levitated interior permanent magnet slice motor
… motor. This design is targeted for use as a blood pump in extracorporeal life support (ECLS) applications. A magnetically levitated blood pump reduces the risk of blood damage that frequently occurs at the blood seal in a conventional pump due to frictional heat generation.
-
Tierexperimentelle Untersuchungen zu Praktikabilität und Hämokompatibilität einer miniaturisierten extrakorporalen Membranoxygenierung
… It is composed of a portable DeltaStream® blood pump and a polymethyl-pentene membrane oxygenator (HILITE7000LT®) with reduced risk of plasma leakage. In the conducted study a heparin-coated miniaturized ECMO system was compared to the standard ECMO system over 24 hours. For that purpose, …
-
Bearingless Slice Motor and 6-DoF Position Sensor for Extracorporeal Pump
… for the bearingless motor is an extracorporeal blood pump. Extracorporeal blood pumps are used to maintain blood flow as a temporary ventricular assist device and/or blood oxygenator. Bearingless pumps can help to avoid blood damage caused by friction and heat generation due to seals and …
-
Evaluation eines Hemoresistometers
The development of blood pumps for use in heart surgery has to fulfill different demands. On the one hand there is technical performance, on the other hand there is low rate of complications. The technical performance can be tested without difficulty by in-vitro tests. Estimation of mean …
-
Implantierbares elektromechanisches Blutpumpensystem zur langfristigen partiellen Herzentlastung
… of the left ventricle. The development of the pump unit is the main target of this work. Due to size minimization of the pump unit, a new gear type is developed which converts a continuous, unidirectional rotation of the electric motor into a translatory pusher plate movement (patent No. DE 197 …
-
Design of Percutaneous Dual Propeller Pump to assist Patients with Single Functional Ventricle
… design of a percutaneous dual propeller pump inserted and mounted inside the TCPC is developed and studied. The designed blood pump is percutaneously inserted via the Femoral vein and deployed at the center of Total Cavopulmonary Connection (TCPC). The two propellers, each placed in the …
-
Improvements to the kidney dialysis machine
… for dialysate flow control, a diaphragm-type blood pump, and an ultrafiltration control system using blood pressure measurement. A kidney dialysis machine was constructed to test the changes for possible use in future dialysis machine designs. Tests were made on each of the five system …
-
Numerische Simulation der Strömung in Miniaturkreiselpumpen zur Blutförderung
… lead to the development of a new generation of blood pumps with minimal size. This development is mainly focussed on hydraulic performance and biocompatibility. This thesis covers the assessment of computational fluid dynamics as a tool to investigate fluid dynamics and blood damaging effects …
-
Kenngrößenorientierte Beurteilung von Rotationsblutpumpen diagonaler Bauart mittels numerischer Strömungssimulation
… the flow phenomena within the implantable rotary blood pump “MikroDiagonalPump” (MDP) by means of Computational Fluid Dynamics (CFD). In the first part, a method has been developed to evaluate different pump geometries and impeller variations in a standardised and efficient way. The evaluation was …
-
A theoretical approach to the prediction of haemolysis in centrifugal blood pumps
The successful use of centrifugal pumps as temporary cardiac assist devices strongly depends on the extent to which they damage blood. The development of a theoretical pump evaluation model was performed in this study to facilitate an effective pump optimisation. The optimisation process seeks to …
-
Extrakorporale Membranoxygenierung mit dem DeltaStream-System bei experimentell induziertem akutem Lungenversagen
… to the size of traditionally used centrifugal pumps and associated risks of adverse events. In contrast, the DeltaStream-system represents a miniaturized extracorporal circuit consisting of a diagonal blood pump and characterized by a significantly reduced foreign surface area and a decreased …
-
Development of an automated plasmapheresis system for the treatment of sepsis
… that is able to separate plasma from whole blood. The device should be able to generate secondary flow to enhance the performance by reducing the formation of cake layer. In addition, the device should be fully automated in order to simplify the technology for the end user. Approach: Design …
-
In-vivo-Implantation der Mikrodiagonalpumpe II beim Kalb : Hämodynamik und Hämolyse
… treatment strategies is intensified. Artificial blood pumps may be used to bridge patients to transplant or might even be implanted as destination therapy. Despite considerable improvements during the last years the rate of complications remains high in regard of hemodynamic and technical …
-
Entwicklung eines hochintegrierten intravaskulären Membranoxygenators für die Behandlung des akuten Lungenversagens
… devices of the last generation. Particularly blood oxygenators have been successfully used for the last decades as components of the heart-lung machines but still don’t offer in the traditional configuration an alternative for the middle and long-term treatment of the acute lung failure. …
-
Homopolar bearingless slice motors with magnet-free rotors for extracorporeal life support
… is a medical therapy that uses an external blood pump and oxygenator to provide cardiac or cardiopulmonary support. One common system-related challenge is to reduce blood damage, e.g., hemolysis, which is primarily caused by the stress and heat from the pump impeller's bearing surface. …
Page 1 of 2