Background: Vascular access remains a challenge in many patients who require ventricular support using the Impella catheter (Abiomed, Inc., Danvers, MA) for high risk percutaneous coronary intervention (PCI). Specifically, limitations of vessel size, calcification and tortuosity may make large bore access difficult. Balloon expandable (BE) sheath technology allows for the insertion of a smaller...

To purchase reprints, contact The InnoVision Group, 101 Columbia, Aliso Viejo, CA 92656. Phone, (800) 8092273 or (949) 362-2050 (ext 532); fax, (949) 362-2049; e-mail, [email protected]. devices approved by the Food and Drug Administration have replaced manual compression and are associated with decreased length of stay and increased comfort and satisfaction for patients. These devices include ...

BACKGROUND Arterial access is a major site of bleeding complications after invasive coronary procedures. Among strategies to decrease vascular complications, the radial approach is an established one. Vascular closure devices provide more comfort to patients and decrease hemostasis and need for bed rest. However, the inconsistency of data proving their safety limits their routine adoption as a ...

OFDMA is a new modulation method for the 2 generation of Broadband Wireless Access (BWA) systems that combines both upstream access and modulation together. OFDMA is based on modulating multiple orthogonal sub-carriers. Unlike traditional multi-carrier modulation schemes, several transmitters of the multiple access system modulate the sub-carriers simultaneously. OFDMA offers up to an 18dB gain...

In this report, the problem of interference in dense wireless network deployments is addressed. Two example scenarios are: 1) overlapping basic service sets (OBSSes) in wireless LAN deployments, and 2) interference among close-by femtocells. The proposed approach is to exploit the interference cancellation and spatial multiplexing capabilities of multiple-input multipleoutput (MIMO) links to mi...

WiMAX is an emerging broadband wireless access system based on IEEE 802.16 specification which defines PHY and MAC layer for both fixed and mobile profiles. The WiMAX system effectively supports wide variety of broadband wireless access (BWA) technologies (including high speed internet and multimedia access) with high Quality of service (QoS) requirements. To support flexibility, efficiency and...

The Next Generation Wireless Systems (NGWSs) consists of heterogeneous wireless access networks such as UMTS, Wi-Fi, WiMAX and LTE where Mobile Users (MUs) can access these technologies and services using a single device. This device is equipped with multiple radio interfaces include devices capable of supporting multiple Radio Access Technologies (RATs) by incorporating several interface cards...