Abstract：
:The effect of stent design on wall shear stress (WSS) and oscillatory shear index (OSI) was studied in vitro using time-resolved digital particle image velocimetry (DPIV). Four drug-eluting stents [XIENCE V (Abbott Vascular), TAXUS Liberté (Boston Scientific), Endeavor (Medtronic), and Cypher (J&J Cordis)] and a bare-metal stent [VISION (Abbott Vascular)] were implanted into compliant vessel models, and the flow was measured in physiologically accurate coronary conditions featuring reversal and realistic offsets between pressure and flowrate. DPIV measurements were made at three locations under two different flow rates (resting: Re = 160, f = 70 bpm and exercise: Re = 300, f = 120 bpm). It was observed that design substantially affected the WSS experienced at the vessel walls. Averaged values between struts ranged from 2.05 dynes/cm(2) (Cypher) to 8.52 dynes/cm(2) (XIENCE V) in resting conditions, and from 3.72 dynes/cm(2) (Cypher) to 14.66 dynes/cm(2) (VISION) for the exercise state. Within the stent, the WSS dropped and the OSI increased immediately distal to each strut. In addition, an inverse correlation between average WSS and OSI existed. Comparisons with recently published results from animal studies show strong correlation between the measured WSS and observed endothelial cell coverage. These results suggest the importance of stent design on the WSS experienced by endothelial cells in coronary arteries.
journal_name
Ann Biomed Engjournal_title
Annals of biomedical engineeringauthors
Charonko J,Karri S,Schmieg J,Prabhu S,Vlachos Pdoi
10.1007/s10439-009-9697-ysubject
Has Abstractpub_date
2009-07-01 00:00:00pages
1310-21issue
7eissn
0090-6964issn
1573-9686journal_volume
37pub_type
杂志文章abstract：:Twenty-one 3.5-month-old female Sprague-Dawley rats were randomly assigned to three groups: BTX group, in which each rat received a single intramuscular injection of 2 U of Clostridium botulinum toxin (BTX) in the quadriceps femoris muscle of the right hind limb; BTX + SR group, in which each rat received a BTX inject...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1007/s10439-011-0406-2
更新日期：2012-03-01 00:00:00
abstract：:Accurate assessment of blood platelet function is essential in understanding thrombus formation which plays a central role in cardiovascular disease. Parallel plate flow chambers have been widely used as they allow for platelet adhesion on a collagen surface at physiologically relevant fluid mechanical forces. Standar...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1007/s10439-009-9708-z
更新日期：2009-07-01 00:00:00
abstract：:Three-dimensional (3D) measurement of the spine can provide important information for functional, developmental, diagnostic, and treatment-effect evaluations. However, existing measurement techniques are either 2-dimensional, highly invasive, or involve a high radiation dose, prohibiting their widespread and repeated ...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1007/s10439-016-1599-1
更新日期：2016-10-01 00:00:00
abstract：:Biomaterial-based tissue engineering strategies hold great promise for osteochondral tissue repair. Yet significant challenges remain in joining highly dissimilar materials to achieve a biomimetic, mechanically robust design for repairing interfaces between soft tissue and bone. This study sought to improve interfacia...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1007/s10439-015-1337-0
更新日期：2015-11-01 00:00:00
abstract：:Ever-increasing demand for bone grafts necessitates the realization of clinical implementation of bone tissue engineered constructs. The predominant hurdle to implementation remains to be securing FDA approval, based on the lack of viable methods for the rigorous monitoring of said constructs. The study presented here...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1007/s10439-017-1937-y
更新日期：2018-01-01 00:00:00
abstract：:Mild traumatic brain injury in sports has become a significant public health concern which has not only received the general public's attention through multiple news media stories involving athletic concussions, but has also resulted in local, state, and national legislative efforts to improve recognition and manageme...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章,评审
doi：10.1007/s10439-011-0413-3
更新日期：2012-01-01 00:00:00
abstract：:This paper describes a finite volume method for modeling electrical activation in a sample of cardiac tissue using the bidomain equations. Microstructural features to the level of cleavage planes between sheets of myocardial fibers in the tissue are explicitly represented. The key features of this implementation compa...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1007/s10439-005-1434-6
更新日期：2005-05-01 00:00:00
abstract：:An understanding of the mechanical deformation behavior of the liver under high strain rate loading conditions could aid in the development of vehicle safety measures to reduce the occurrence of blunt liver injury. The purpose of this study was to develop a constitutive model of the stress-strain behavior of the human...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1007/s10439-008-9555-3
更新日期：2008-11-01 00:00:00
abstract：:Glaucoma is a common optic neuropathy characterized by retinal ganglion cell death. Elevated intraocular pressure (IOP), a key risk factor for glaucoma, leads to significant biomechanical deformation of optic nerve head (ONH) cells and tissues. ONH astrocytes respond to this deformation by transforming to a reactive, ...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1007/s10439-017-1967-5
更新日期：2018-02-01 00:00:00
abstract：:The pia-arachnoid complex (PAC) covering the brain plays an important role in the mechanical response of the brain during impact or inertial loading. Recent studies have revealed the complicated material behavior of the PAC. In this study, the nonlinear viscoelastic, transversely isotropic material properties of the P...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1007/s10439-013-0948-6
更新日期：2014-04-01 00:00:00
abstract：:Polycrystalline silicon (poly-Si) micromechanical structures can be made by selectively etching an underlying sacrificial oxide layer. Advantages of this micromachining technique are its simplicity and compatibility with conventional integrated-circuit processing. Compressive internal stress in poly-Si films constrain...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1007/BF02584269
更新日期：1986-01-01 00:00:00
abstract：:Wall stress analysis of abdominal aortic aneurysm (AAA) is a promising method of identifying AAAs at high risk of rupture. However, neglecting residual strains (RS) in the load-free configuration of patient-specific finite element analysis models is a sever limitation that strongly affects the computed wall stresses. ...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1007/s10439-013-0749-y
更新日期：2013-07-01 00:00:00
abstract：:The local dilation of the infrarenal abdominal aorta, termed an abdominal aortic aneurysm (AAA), is often times asymptomatic and may eventually result in rupture-an event associated with a significant mortality rate. The estimation of in-vivo stresses within AAAs has been proposed as a useful tool to predict the likel...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1007/s10439-008-9490-3
更新日期：2008-06-01 00:00:00
abstract：:The combination of gene therapy and chemotherapy has showed increased therapeutic efficacy in the treatment of cancers, but it is not well investigated about the actual coordination pattern between therapeutic gene and chemical drug. In this work, p53/BPEI-β-CD/AD-dox complex was fabricated and employed to investigate...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1007/s10439-016-1627-1
更新日期：2016-11-01 00:00:00
abstract：:A vaccine that induces broadly neutralizing antibodies (bnAbs) against the human immunodeficiency virus (HIV) would be instrumental in controlling the disease. The membrane proximal external region (MPER) peptide is an appealing antigen candidate since it is conserved and is the target of several human bnAbs, such as ...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1007/s10439-019-02398-8
更新日期：2020-07-01 00:00:00
abstract：:We describe a system for real-time control of biological and other experiments. This device, based around the Real-Time Linux operating system, was tested specifically in the context of dynamic clamping, a demanding real-time task in which a computational system mimics the effects of nonlinear membrane conductances in...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1114/1.1408929
更新日期：2001-10-01 00:00:00
abstract：:In order to obtain the first quantitative measurements of the in vivo stresses in early-stage amphibian embryos, we developed a novel instrument that uses a pair of parallel wires that are glued to the surface of an embryo normal to the direction in which the stress is to be determined. When a slit is made parallel to...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1007/s10439-006-9250-1
更新日期：2007-04-01 00:00:00
abstract：:Of the many models of peripheral nerve in the literature, essentially all have relied on experimentally derived values for the anisotropic resistivity of the nerve bundle interstitial space. This paper is a comprehensive mathematical analysis of the most referenced experiment for the longitudinal and radial resistivit...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1007/BF02368054
更新日期：1989-01-01 00:00:00
abstract：:Arteries are composed of multiple constituents that endow the wall with proper structure and function. Many vascular diseases are associated with prominent mechanical and biological alterations in the wall constituents. In this study, planar biaxial tensile test data of elastase-treated porcine aortic tissue (Chow et ...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1007/s10439-012-0733-y
更新日期：2013-07-01 00:00:00
abstract：:Continuum-level finite element models (FEMs) of the humerus offer the ability to evaluate joint replacement designs preclinically; however, experimental validation of these models is critical to ensure accuracy. The objective of the current study was to quantify experimental full-field strain magnitudes within osteoar...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1007/s10439-020-02549-2
更新日期：2020-12-01 00:00:00
abstract：:We describe the development of experimental platforms to quantify the regeneration of injured central nervous system (CNS) neurons by combining engineering technologies and primary neuronal cultures. Although the regeneration of CNS neurons is an important area of research, there are no currently available methods to ...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章,评审
doi：10.1007/s10439-012-0515-6
更新日期：2012-06-01 00:00:00
abstract：:The complexity of the coronary circulation especially in the deep layers largely evades experimental investigations. Hence, virtual/computational models depicting structure-function relation of the entire coronary vasculature including the deep layer are imperative. In order to interpret such anatomically based models...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1007/s10439-007-9278-x
更新日期：2007-05-01 00:00:00
abstract：:This paper presents two related methods for registering an image of an anatomical object with data from sensors arranged on the object. One method is described with reference to a test case involving a rectangular electrode plaque disposed on a heart surface, which is imaged with MRI. Data from the electrodes is fused...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1007/s10439-007-9350-6
更新日期：2007-10-01 00:00:00
abstract：:Early stage changes in hypertensive arteries have a significant effect on the long-term adaptation of the arteries. Compared to the long-term adaptation, little is known about the early dimensional and functional changes in hypertensive arteries in the first few days of hypertension. To study the early stage changes i...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1114/1.1376391
更新日期：2001-06-01 00:00:00
abstract：:Cumulative exposure to head impacts during contact sports can elicit potentially deleterious brain white matter alterations in young athletes. Head impact exposure is commonly quantified using wearable sensors; however, these sensors tend to overestimate the number of true head impacts that occur and may obfuscate pot...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1007/s10439-020-02662-2
更新日期：2020-12-01 00:00:00
abstract：:A mathematical model is presented that estimates joint kinematics and kinetics using measured external resultant loads and readily available parameters. The musculo-skeletal system was represented by a planar three degrees of freedom open kinematic chain. Information extraction was limited to the flexion-extension fun...
journal_title：Annals of biomedical engineering
pub_type： 临床试验,杂志文章
doi：10.1023/b:abme.0000030241.26857.75
更新日期：2004-05-01 00:00:00
abstract：:Effects of hyperthermia on transport of low-density lipoprotein (LDL) through a stenosed arterial wall are analyzed comprehensively in the present work. The realistic and pertinent aspects of an arterial wall is represented by a multi-layer model, with a proper representation of the thickened intima region due to the ...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1007/s10439-014-1196-0
更新日期：2015-07-01 00:00:00
abstract：:Concussion tolerance and head impact exposure are highly variable among football players. Recent findings highlight that head impact data analyses need to be performed at the subject level. In this paper, we describe a method of characterizing concussion risk between individuals using a new survival analysis technique...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1007/s10439-020-02675-x
更新日期：2020-11-01 00:00:00
abstract：:We propose a novel method to reconstruct the hypothetical geometry of the healthy vasculature prior to intracranial aneurysm (IA) formation: a Frenet frame is calculated along the skeletonization of the arterial geometry; upstream and downstream boundaries of the aneurysmal segment are expressed in terms of the local ...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1007/s10439-013-0794-6
更新日期：2013-07-01 00:00:00
abstract：:We present here the first quantitative correlation for cell contact guidance in an oriented fibrillar network in terms of biased cell migration. The correlation is between the anisotropic cell diffusion parameter, DA = Dx/Dy, and the collagen gel birefringence, delta n, a measure of axially biased collagen fibril orie...
journal_title：Annals of biomedical engineering
pub_type： 杂志文章
doi：10.1007/BF02368241
更新日期：1994-07-01 00:00:00
