نتایج جستجو برای: expandable additive
تعداد نتایج: 71601 فیلتر نتایج به سال:
Transcutaneous aortic valve implantation has been established as an effective method for the treatment of highgrade stenosis in non-operative, high-risk conventional surgery patients. According to developed technologies, prostheses are divided into balloon-expandable (balloon-expandable valves, BEV) and self-expanding (self-expanding SEV). The two types devices have different models implantatio...
Background—Transcatheter aortic valve implantation (TAVI) is associated with a higher risk of neurological events for both the transfemoral and transapical approach than surgical valve replacement. Cerebral magnetic resonance imaging has revealed more new, albeit clinically silent lesions from procedural embolization, yet the main source and predominant procedural step of emboli remain unclear....
OBJECTIVES Several alternative transapical (TA) aortic prostheses for aortic valve implantation (AVI) have recently become available. Data directly comparing the performance of these different TA-AVI valves, however, are sparse. Therefore, we sought to analyse the performance of the better-established balloon-expandable SAPIEN XT™ valve system, and compare it with the recently approved self-exp...
In CDMA (Code - Division Multiple - Access) systems multi - user accessing of a channel is possible. Under the assumptions of Optimum multi - user and decorrelating detector in CDMA systems. By using signals with zero and / or identical cross correlations, a simple and expandable decorrelating detector with optimum efficiency which can be easily implemented are proposed. Constructing these sign...
BACKGROUND Lumbar disc degeneration may be so advanced and asymmetrical that transforaminal access to the interbody space is limited. The extent of collapse may compromise the capacity to restore disc height and coronal balance in minimally invasive approaches. Although a variety of distractors are available for open approaches, currently there is no feasible distractor that is functional withi...
BACKGROUND Because transcatheter implantation of pulmonary valve is indicated for limited-size dysfunctional right ventricular outflow tract only as a balloon-expandable stent, we investigated the feasibility of a large-diameter self-expandable valved stent and the durability of the valve after >6 months. METHODS We made a nitinol-wire-based, self-expandable valved stent with leaflets made fr...
BACKGROUND Transcatheter aortic valve implantation (TAVI) is associated with a higher risk of neurological events for both the transfemoral and transapical approach than surgical valve replacement. Cerebral magnetic resonance imaging has revealed more new, albeit clinically silent lesions from procedural embolization, yet the main source and predominant procedural step of emboli remain unclear....
OBJECTIVE To evaluate the use of balloon-expandable metallic stents in the treatment of children with tracheomalacia and bronchomalacia in whom conventional therapy has failed. DESIGN Retrospective case series. SETTING Tertiary pediatric otolaryngology and cardiothoracic surgery referral center. PATIENTS Six patients were identified as having undergone bronchoscopic placement of metallic ...
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