Study of Left Ventricular Bypass Using Wankel Type Semipulsatile Blood Pump

Mitsui, Norimasa; Fukunaga, Shintaro; Sueda, Taijiro; Matsuura, Yuichiro; Havlik, P.; Trinkl, J.; Demunck, J. L.; Mesana, Thierry G.; Montiès, J R

doi:10.1046/j.1525-1594.1998.06129.x

Cited by 7 publications

(6 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The simplest VAD representation is a prescribed flow function. 15 A more sophisticated method was to construct an equation containing the variables of pump flow, pressure difference across the pump, and the pump rotation speed, matching the experimental measurements of the pump characteristics using regression analysis, while the pump rotor dynamics were either neglected 1,3,4,13,14,30 or modeled considering the various momenta acting on the rotor. 7,11,32 In this article, the pump is modeled by constructing a relationship Q = Q(DP, x) to describe the characteristic pressure-flow relation, while the rotor dynamics of the pump are assumed to be ideal and not included.…”

Section: Model Of the Impeller Pump Vadmentioning

confidence: 99%

Numerical Modeling of Hemodynamics with Pulsatile Impeller Pump Support

2010

View full text Add to dashboard Cite

There is significant interest in the development and application of variable speed impeller-pump type ventricular assist devices designed to generate pulsatile blood flow. However, no study has so far been carried out to investigate the systemic cardiovascular response to various aspects of pump motion. In this article, a numerical model is constructed for the simulation of the cardiovascular response in the heart failure condition under representative cases of pulsatile impeller pump support. The native cardiovascular model is based on a previously validated model, and the impeller pump is modeled by directly fitting the pressure-flow curves that describe the pump characteristics. The model developed is applied to study circulatory dynamics under different degrees of phase shift and pulsation ratio in the pump motion profile. The characteristic variables are discussed as criteria for the evaluation of system response for comparison of the pulsatile flows. Simulation results show that a constant pump speed is the most efficient work mode for the rotary pump, and with the application of either a phase shift of 75% and a pulsation ratio of 0.5, or a phase shift of 42% and a pulsation ratio of 0.55, it is possible to generate arterial pulse pressure with the maximal magnitude of about 28 mmHg. However, this is achieved at the cost of reduced cardiac output and pump efficiency.

show abstract

Section: Model Of the Impeller Pump Vadmentioning

confidence: 99%

Numerical Modeling of Hemodynamics with Pulsatile Impeller Pump Support

2010

View full text Add to dashboard Cite

show abstract

“…The application of the Wankel drive principle in a rotary piston pump for an artificial heart was first proposed by Verbiski et al [14]. Norimasa et al [15,16] also conducted an experimental study on an artificial heart based on the Wankel principle. Wappenschmidt et al [17] reviewed rotary piston artificial hearts.…”

Section: Introductionmentioning

confidence: 99%

Design of a Wankel pump constant pressure grouting system based on Fuzzy PID Method

Wang²,

Zhang

et al. 2023

Preprint

View full text Add to dashboard Cite

In underground engineering disaster management, existing grouting devices are mainly plunger pumps with large output pulses, which easily cause secondary damage to the surrounding rock of tunnels. Using a rotary piston Wankel pump, an intelligent dual-liquid grouting automation control system (SDUZJ) was developed based on the Fuzzy-PID composite control method to achieve steady output pressure control. Fuzzy control was used when the target and current pressure difference was large to improve self-adaptability and response time. Conversely, PID controller was used when the difference was small to eliminate static differences for steady-state regulation. Combined with the human–computer interaction interface of the computer, automatic control of dual-liquid grouting, alarm recording, real-time monitoring curve, system data setting, and historical data query were realized. A constant-pressure fracturing grouting model experiment with three-axis stress was performed using the proposed system. The Fuzzy control mode was selected to rapidly increase the grouting pressure and flow (pressurization stage) and adjust the grouting pressure to the target value (fracture initiation stage) through rapid rotation of the stepper motor. In the pressure stabilization and fracturing expansion stage, the PID control mode was used for grouting pressure and flow stabilization. Therefore, the Fuzzy-PID pressure stabilization grouting control was realized.

show abstract

“…In a working cycle, the multichamber structure can independently generate multivolume periodic changes. Wankel engines have good capacity characteristics and can generate high specific power and high vacuum and are therefore used in positive-displacement compressors [6,7] and expanders [8][9][10][11], especially as rotary positive-displacement pumps, not only retaining the structural advantages of Wankel engines but also exerting the advantages of fewer parts, small size, minimal vibration, and compact structure [12][13][14][15][16][17][18]. Therefore, Wankel pumps are applied in the fields of medical treatment, industry, water and hydropower, etc.…”

Section: Introductionmentioning

confidence: 99%

Design and Experimental Study of a Tetragonal Rotor Pump Based on Wankel Geometry

Gui

Zhou

Zeng

et al. 2022

Sensors

View full text Add to dashboard Cite

Wankel pump designs have not been fully established, with existing designs limited to bicornous rotor pumps and triangular rotor pumps. Here, on the basis of Wankel geometry, we present a tetragonal rotor pump with a three-lobe epicycloid and its conjugate envelope as chamber and rotor profile. First, the design method and basic working principle of the pump are introduced. Four groups of prototypes with different shape factors were manufactured, and their flow and pressure characteristics were experimentally studied. Numerical study showed that the flow rate irregularity of the pump is lower than that of existing Wankel pumps. Finally, the feasibility the pump for mixing applications was verified by a flow field observation experiment. The work in this paper provides a new type of rotary displacement pump design, representing an study of reverse application of a Wankel engine structure.

show abstract

Study of Left Ventricular Bypass Using Wankel Type Semipulsatile Blood Pump

Cited by 7 publications

References 16 publications

Numerical Modeling of Hemodynamics with Pulsatile Impeller Pump Support

Numerical Modeling of Hemodynamics with Pulsatile Impeller Pump Support

Design of a Wankel pump constant pressure grouting system based on Fuzzy PID Method

Design and Experimental Study of a Tetragonal Rotor Pump Based on Wankel Geometry

Contact Info

Product

Resources

About