Computational fluid dynamic simulations of cavopulmonary connections with an extracardiac lateral conduit.

Abstract:

:Complex congenital heart defects due to the absence of a ventricular chamber can often be treated by the Fontan surgical procedure. The objective of this work was to quantify the haemodynamics in the Fontan operation (cavopulmonary connection) with extracardiac lateral conduit. Four different models based on the finite element method were constructed with different lengths of inferior anastomosis (range 18-25 mm) and inclinations of the conduit (33 and 47.5 degrees). Mass conservation and Navier-Stokes equations were solved by means of the FIDAP code, based on the finite element method. The left-to-right pulmonary flow ratio and percentage inferior caval blood to the left lung were the highest with the smallest anastomosis and highest inclination: 1.35 and 83.26%, respectively. Dissipated power percentage was higher with the largest anastomosis than with the smallest (19.4 vs 15.8%). It was concluded that, when performing a total cavopulmonary connection, an extracardiac lateral conduit: (i) diverts more flow to the left lung, and (ii) shows higher energy losses when compared with a connection with intra-atrial tunnel. This study could be useful to evaluate the incidence of pulmonary arteriovenous malformations.

journal_name

Med Eng Phys

authors

Migliavacca F,de Leval MR,Dubini G,Pietrabissa R,Fumero R

doi

10.1016/s1350-4533(99)00042-9

subject

Has Abstract

pub_date

1999-04-01 00:00:00

pages

187-93

issue

3

eissn

1350-4533

issn

1873-4030

pii

S1350453399000429

journal_volume

21

pub_type

杂志文章
  • A computational assessment of the hemodynamic effects of crossed and non-crossed bifurcated stent-graft devices for the treatment of abdominal aortic aneurysms.

    abstract::There are several issues attributed with abdominal aortic aneurysm endovascular repair. The positioning of bifurcated stent-grafts (SG) may affect SG hemodynamics. The hemodynamics and geometrical parameters of crossing or non-crossing graft limbs have not being totally accessed. Eight patient-specific SG devices and ...

    journal_title:Medical engineering & physics

    pub_type: 杂志文章

    doi:10.1016/j.medengphy.2016.09.011

    authors: Stefanov F,McGloughlin T,Morris L

    更新日期:2016-12-01 00:00:00

  • A novel, inexpensive and easy to use tendon clamp for in vitro biomechanical testing.

    abstract::Frozen clamps can hold tendons and ligaments tightly and transmit high loads, from 4 kN to 13 kN, without slippage, yet they are complex and expensive. The existing non-frozen serrated jaw clamp is simple to fabricate and use, but the maximal tensile force it can sustain is only about 2.5 kN, which is not enough in ma...

    journal_title:Medical engineering & physics

    pub_type: 杂志文章

    doi:10.1016/j.medengphy.2011.11.019

    authors: Shi D,Wang D,Wang C,Liu A

    更新日期:2012-05-01 00:00:00

  • Motor unit firing rates and synchronisation affect the fractal dimension of simulated surface electromyogram during isometric/isotonic contraction of vastus lateralis muscle.

    abstract::During fatiguing contractions, many adjustments in motor units behaviour occur: decrease in muscle fibre conduction velocity; increase in motor units synchronisation; modulation of motor units firing rate; increase in variability of motor units inter-spike interval. We simulated the influence of all these adjustments ...

    journal_title:Medical engineering & physics

    pub_type: 杂志文章

    doi:10.1016/j.medengphy.2016.09.022

    authors: Mesin L,Dardanello D,Rainoldi A,Boccia G

    更新日期:2016-12-01 00:00:00

  • Attention attraction in an ophthalmic diagnostic device using sound-modulated fixation targets.

    abstract::This study relates to eye fixation systems with combined optical and audio systems. Many devices for eye diagnostics and some devices for eye therapeutics require the patient to fixate on a small target for a certain period of time, during which the eyes do not move and data from substructures of one or both eyes are ...

    journal_title:Medical engineering & physics

    pub_type: 杂志文章

    doi:10.1016/j.medengphy.2016.05.004

    authors: Gramatikov BI,Rangarajan S,Irsch K,Guyton DL

    更新日期:2016-08-01 00:00:00

  • Review on aspects of artificial tactile feedback in laparoscopic surgery.

    abstract::Since direct manual tissue palpation is not possible in laparoscopic surgery, feedback information on tactile tissue properties is considerably diminished. Restoring part of the surgeon's sense of touch through devices capable of providing artificial tactile feedback (ATF) is an active field of applied research and de...

    journal_title:Medical engineering & physics

    pub_type: 杂志文章,评审

    doi:10.1016/j.medengphy.2009.06.003

    authors: Schostek S,Schurr MO,Buess GF

    更新日期:2009-10-01 00:00:00

  • Quantitative characterisation of impaction events during femoral broaching in total hip arthroplasty.

    abstract::Total hip arthroplasty (THA) broaching involves impacting a broach handle with a mallet, facilitating force transmission to progress broaches into the femoral medullary canal. Limited surgical access during direct anterior THAs increases off-axis forces, potentially contributing to tissue damage. The aim was to charac...

    journal_title:Medical engineering & physics

    pub_type: 杂志文章

    doi:10.1016/j.medengphy.2019.12.004

    authors: Preutenborbeck M,Reuter J,Ferrari E

    更新日期:2020-02-01 00:00:00

  • Computer simulation of commercial conductive gels and their application to increase the safety of electrochemotherapy treatment.

    abstract::Electrochemotherapy (ECT) exploits the phenomenon of electroporation, which is the increase of cell permeability through the application of an electrical field. This technique is applied in medical centers in Europe and in veterinary clinics in Europe, Brazil, and Argentina. ECT treatment requires a minimum electric f...

    journal_title:Medical engineering & physics

    pub_type: 杂志文章

    doi:10.1016/j.medengphy.2019.09.016

    authors: Pintarelli GB,Berkenbrock JA,Rassele A,Rangel MMM,Suzuki DOH

    更新日期:2019-12-01 00:00:00

  • Determination of backrest inclination based on biodynamic response study for prevention of low back pain.

    abstract::Whole-body vibration experiments with subjects under vertical vibration were performed to examine and evaluate effects of backrest inclination on vibration transmitted through seats to the human body by using biodynamic response parameters represented by apparent mass (APMS) and vibration power absorption (VPA). The b...

    journal_title:Medical engineering & physics

    pub_type: 临床试验,杂志文章

    doi:10.1016/j.medengphy.2010.02.007

    authors: Shibata N,Maeda S

    更新日期:2010-07-01 00:00:00

  • Recurrence quantification analysis as a tool for nonlinear exploration of nonstationary cardiac signals.

    abstract::The complexity, nonlinearity and nonstationarity of the cardiovascular system typically defy comprehensive and deterministic mathematical modeling, except from a statistical perspective. Living systems are governed by numerous, continuously changing, interacting variables in the presence of noise. Cardiovascular signa...

    journal_title:Medical engineering & physics

    pub_type: 杂志文章

    doi:10.1016/s1350-4533(01)00112-6

    authors: Zbilut JP,Thomasson N,Webber CL

    更新日期:2002-01-01 00:00:00

  • Model-based physiomarkers of cerebral hemodynamics in patients with mild cognitive impairment.

    abstract::In our previous studies, we have introduced model-based "functional biomarkers" or "physiomarkers" of cerebral hemodynamics that hold promise for improved diagnosis of early-stage Alzheimer's disease (AD). The advocated methodology utilizes subject-specific data-based dynamic nonlinear models of cerebral hemodynamics ...

    journal_title:Medical engineering & physics

    pub_type: 杂志文章

    doi:10.1016/j.medengphy.2014.02.025

    authors: Marmarelis VZ,Shin DC,Orme ME,Zhang R

    更新日期:2014-05-01 00:00:00

  • Biomechanical design using in-vitro finite element modeling of distal femur fracture plates made from semi-rigid materials versus traditional metals for post-operative toe-touch weight-bearing.

    abstract::This proof-of-concept study designs distal femur fracture plates from semi-rigid materials vs. traditional metals for toe-touch weight-bearing recommended to patients immediately after surgery. The two-fold goal was to (a) reduce stress shielding (SS) by increasing cortical bone stress thereby reducing the risk of bon...

    journal_title:Medical engineering & physics

    pub_type: 杂志文章

    doi:10.1016/j.medengphy.2020.11.015

    authors: Gee A,Bougherara H,Schemitsch EH,Zdero R

    更新日期:2021-01-01 00:00:00

  • Application of higher order statistics/spectra in biomedical signals--a review.

    abstract::For many decades correlation and power spectrum have been primary tools for digital signal processing applications in the biomedical area. The information contained in the power spectrum is essentially that of the autocorrelation sequence; which is sufficient for complete statistical descriptions of Gaussian signals o...

    journal_title:Medical engineering & physics

    pub_type: 杂志文章,评审

    doi:10.1016/j.medengphy.2010.04.009

    authors: Chua KC,Chandran V,Acharya UR,Lim CM

    更新日期:2010-09-01 00:00:00

  • Assessment of four statistical pattern recognition techniques to assist in obstructive sleep apnoea diagnosis from nocturnal oximetry.

    abstract::The aim of this study is to assess the utility of traditional statistical pattern recognition techniques to help in obstructive sleep apnoea (OSA) diagnosis. Classifiers based on quadratic (QDA) and linear (LDA) discriminant analysis, K-nearest neighbours (KNN) and logistic regression (LR) were evaluated. Spectral and...

    journal_title:Medical engineering & physics

    pub_type: 杂志文章

    doi:10.1016/j.medengphy.2009.05.010

    authors: Marcos JV,Hornero R,Alvarez D,del Campo F,Zamarrón C

    更新日期:2009-10-01 00:00:00

  • Herringbone-like hydrodynamic structures in microchannels: A CFD model to evaluate the enhancement of surface binding.

    abstract::Selected adsorption efficiency of a molecule in solution in a microchannel is strongly influenced by the convective/diffusive mass transport phenomena that supply the target molecule to the adsorption surface. In a standard microchannel with a rectangular cross section, laminar flow regime limits the fluid mixing, thu...

    journal_title:Medical engineering & physics

    pub_type: 杂志文章

    doi:10.1016/j.medengphy.2017.07.003

    authors: Bianchi E,Piergiovanni M,Arrigoni C,Fukuda J,Gautieri A,Moretti M,Dubini G

    更新日期:2017-10-01 00:00:00

  • Effect of different inertial parameter sets on joint moment calculation during stair ascending and descending.

    abstract::The reliability of internal joint moment calculation in gait analysis during daily living activities is fundamental for clinical decisions based on joint function. This calculation, obtained by means of the inverse dynamics, depends on several modelling factors, such as assumptions on the segments and on the relevant ...

    journal_title:Medical engineering & physics

    pub_type: 临床试验,杂志文章

    doi:10.1016/j.medengphy.2004.12.002

    authors: Fantozzi S,Stagni R,Cappello A,Leardini A

    更新日期:2005-07-01 00:00:00

  • Thermographic imaging in the beating heart: a method for coronary flow estimation based on a heat transfer model.

    abstract::Intraoperative thermographic imaging in open-chest conditions can provide the surgeon with important qualitative information regarding coronary flow by utilizing heat transfer analysis following injection of cold saline into the aortic root. The heat transfer model is based on the assumption that the epicardial temper...

    journal_title:Medical engineering & physics

    pub_type: 杂志文章

    doi:10.1016/s1350-4533(98)00040-x

    authors: Gordon N,Rispler S,Sideman S,Shofty R,Beyar R

    更新日期:1998-09-01 00:00:00

  • A decentralized adaptive fuzzy robust strategy for control of upright standing posture in paraplegia using functional electrical stimulation.

    abstract::In this paper, we present a novel decentralized robust methodology for control of quiet upright posture during arm-free paraplegic standing using functional electrical stimulation (FES). Each muscle-joint complex is considered as a subsystem and individual controllers are designed for each one. Each controller operate...

    journal_title:Medical engineering & physics

    pub_type: 杂志文章

    doi:10.1016/j.medengphy.2011.06.013

    authors: Kobravi HR,Erfanian A

    更新日期:2012-01-01 00:00:00

  • Contrary to basic kinematic modelling, during tight turns, wheelchairs can slide sideways by non-negligible magnitudes: Collision risks may be increased.

    abstract::Small spaces make collision-free turns difficult for wheelchair users. Contrary to basic kinematic wheelchair modelling and not considered previously by engineers; when wheelchairs turn in small spaces, could lateral drift (sideways slipping) increase the risk of collisions with surrounding structures such as walls an...

    journal_title:Medical engineering & physics

    pub_type: 杂志文章

    doi:10.1016/j.medengphy.2020.11.012

    authors: Abraham BB

    更新日期:2021-01-01 00:00:00

  • Including aortic valve morphology in computational fluid dynamics simulations: initial findings and application to aortic coarctation.

    abstract::Computational fluid dynamics (CFD) simulations quantifying thoracic aortic flow patterns have not included disturbances from the aortic valve (AoV). 80% of patients with aortic coarctation (CoA) have a bicuspid aortic valve (BAV) which may cause adverse flow patterns contributing to morbidity. Our objectives were to d...

    journal_title:Medical engineering & physics

    pub_type: 杂志文章

    doi:10.1016/j.medengphy.2012.07.015

    authors: Wendell DC,Samyn MM,Cava JR,Ellwein LM,Krolikowski MM,Gandy KL,Pelech AN,Shadden SC,LaDisa JF Jr

    更新日期:2013-06-01 00:00:00

  • Flexible impulse transfer using a Newton's Cradle-inspired catheter: A feasibility study.

    abstract::A major challenge during minimally invasive surgery is transfer of high forces through small, flexible instruments, such as needles and catheters, because of their low buckling resistance. In this study, we determined the feasibility of using a Newton's Cradle-inspired catheter (patented) to transfer high-force impuls...

    journal_title:Medical engineering & physics

    pub_type: 杂志文章

    doi:10.1016/j.medengphy.2018.12.025

    authors: Sakes A,Grandia L,Lether R,Steenstra L,Valentijn MC,Breedveld P,Spronck JW

    更新日期:2019-05-01 00:00:00

  • Reliability, validity, and precision of an active stereophotogrammetry system for three-dimensional evaluation of the human torso.

    abstract::To determine the reliability, stability, validity and precision of a stereophotogrammetry (SP) system for use in quantifying the complex three-dimensional structure of the human torso, we performed assessments of the system using images of geometric solids and a human-form mannequin. Analysis of geometric solids revea...

    journal_title:Medical engineering & physics

    pub_type: 杂志文章

    doi:10.1016/j.medengphy.2009.08.011

    authors: Paul SM,Chamberlin AP,Hatt C,Nayak AV,Danoff JV

    更新日期:2009-12-01 00:00:00

  • Automated analysis of MR image of hip: geometrical evaluation of the Legg-Calve-Perthes disease.

    abstract::This study proposes semi-automatic determination of geometrical features in hip magnetic resonance (MR) images in order to evaluate the Legg-Calvé-Perthes disease (LCPD). Nine anatomical points on a hip image are selected by a clinician; then eight geometrical indexes of the hip joint are calculated: acetabulum head i...

    journal_title:Medical engineering & physics

    pub_type: 杂志文章

    doi:10.1016/j.medengphy.2004.10.003

    authors: Pouletaut P,Claude I,Winzenrieth R,Ho Ba Tho MC,Sebag G

    更新日期:2005-06-01 00:00:00

  • An impedance sensor to monitor and control cerebral ventricular volume.

    abstract::This paper presents a sensor for monitoring and controlling the volume of the cerebrospinal fluid-filled ventricles of the brain. The measurement principle of the sensor exploits electrical conductivity differences between the cerebrospinal fluid and the brain tissue. The electrical contrast was validated using dog br...

    journal_title:Medical engineering & physics

    pub_type: 杂志文章

    doi:10.1016/j.medengphy.2009.03.011

    authors: Linninger A,Basati S,Dawe R,Penn R

    更新日期:2009-09-01 00:00:00

  • Automatic detection of EEG artefacts arising from head movements using EEG and gyroscope signals.

    abstract::Contamination of EEG signals by artefacts arising from head movements has been a serious obstacle in the deployment of automatic neurological event detection systems in ambulatory EEG. In this paper, we present work on categorizing these head-movement artefacts as one distinct class and on using support vector machine...

    journal_title:Medical engineering & physics

    pub_type: 杂志文章

    doi:10.1016/j.medengphy.2012.08.017

    authors: O'Regan S,Faul S,Marnane W

    更新日期:2013-07-01 00:00:00

  • Validated computational framework for efficient systematic evaluation of osteoporotic fracture fixation in the proximal humerus.

    abstract::The high rate of fixation failure in osteoporotic proximal humerus fractures indicate the need for improved solutions. Computer simulations may help to overcome the limitations of the gold standard biomechanical testing in evaluating the performance of new implants and enhance the effectivity and outcome of the design...

    journal_title:Medical engineering & physics

    pub_type: 杂志文章

    doi:10.1016/j.medengphy.2018.04.011

    authors: Varga P,Inzana JA,Gueorguiev B,Südkamp NP,Windolf M

    更新日期:2018-07-01 00:00:00

  • Dynamic behavior of tripolar hip endoprostheses under physiological conditions and their effect on stability.

    abstract::Tripolar systems have been implanted to reduce the risk of recurrent dislocation. However, there is little known about the dynamic behavior of tripolar hip endoprostheses under daily life conditions and achieved joint stability. Hence, the objective of this biomechanical study was to examine the in vivo dynamics and d...

    journal_title:Medical engineering & physics

    pub_type: 杂志文章

    doi:10.1016/j.medengphy.2013.09.007

    authors: Fabry C,Kaehler M,Herrmann S,Woernle C,Bader R

    更新日期:2014-01-01 00:00:00

  • Design of a biodegradable plate for femoral shaft fracture fixation.

    abstract::Biodegradable materials have been generating increasing bit of interest in biomedical applications and associated research. The evolution of implants made up of such materials (Mg-alloys, etc.) has the potential to be a game changer in fracture surgeries. These implants are essentially made up of a plate and a number ...

    journal_title:Medical engineering & physics

    pub_type: 杂志文章

    doi:10.1016/j.medengphy.2020.05.010

    authors: Chandra G,Pandey A,Pandey S

    更新日期:2020-07-01 00:00:00

  • Reconstruction of dental ultrasonic scaler 3D vibration patterns from phase-related data.

    abstract::Ultrasonic scalers are used in dentistry for removing mineralised plaque, known as calculus, from tooth surfaces. Though there is much information relating to the longitudinal vibrations of scaler probes, corresponding lateral data is limited. Understanding the lateral motion of ultrasonic probes is essential as, when...

    journal_title:Medical engineering & physics

    pub_type: 杂志文章

    doi:10.1016/j.medengphy.2010.02.010

    authors: Lea SC,Landini G

    更新日期:2010-07-01 00:00:00

  • In vivo estimation of normal left ventricular stiffness and contractility based on routine cine MR acquisition.

    abstract::Post-myocardial infarction remodeling process is known to alter the mechanical properties of the heart. Biomechanical parameters, such as tissue stiffness and contractility, would be useful for clinicians to better assess the severity of the diseased heart. However, these parameters are difficult to obtain in the curr...

    journal_title:Medical engineering & physics

    pub_type: 杂志文章

    doi:10.1016/j.medengphy.2020.09.003

    authors: Rumindo GK,Ohayon J,Croisille P,Clarysse P

    更新日期:2020-11-01 00:00:00

  • Wheelchair integrated occupant restraints: feasibility in frontal impact.

    abstract::Individuals often use their wheelchair as a motor vehicle seat when traveling in motor vehicles. The current use of fixed vehicle-mounted wheelchair occupant restraint systems (FWORSs) often results in poor belt fit and discomfort. Additionally, satisfaction, usability and usage rate of FWORSs during transit use are o...

    journal_title:Medical engineering & physics

    pub_type: 杂志文章

    doi:10.1016/s1350-4533(01)00082-0

    authors: VanRoosmalen L,Bertocci GE,Ha D,Karg P

    更新日期:2001-12-01 00:00:00