11489results about How to "Reduce leakage" patented technology

An apparatus for facilitating securement of a vascular graft within a blood vessel, includes a shaft dimensioned for passage within a blood vessel and having an expansion member movable between a contracted condition and an expanded condition and a fastener array comprising at least one fastener disposed about a peripheral portion of the expansion member. The one fastener is deployable into a wall of the blood vessel upon movement of the expansion member to the expanded condition thereof, to thereby engage the vascular graft to secure the vascular graft to a wall of the blood vessel. The fastener array preferably includes a plurality of fasteners. The fasteners may be operatively connected to each other and releasably secured to the peripheral portion of the expansion member.

A process is provided for making a soft, high density, absorbent material with improved characteristics. A web is formed from material that includes a mixture of cellulosic fibers and synthetic polymer fibers. Then, the web is preferably compacted and embossed at an elevated temperature to further increase the web density and preferably to also create liquid-stable bonds between the synthetic polymer fibers and the cellulosic fibers in spaced-apart regions of the web.

A surgical fastener for use with an anastomosis of two tissues includes a base leg and an upright leg. The base leg is selectively deformable and includes a traumatic tip for piecing tissue. The surgical fastener also includes at least one capillary disposed on the base leg which has a reservoir defined therein for retaining a liquid, e.g., bioadhesive, bonding agent, medicament, etc. Each of the capillaries is ruptureable upon deformation of the surgical fastener to dispense the liquid to the anastomosis site.

The invention includes methods of and apparatus for endovascularly replacing a heart valve of a patient. One aspect of the invention provides a method including the steps of endovascularly delivering a replacement valve and an expandable anchor to a vicinity of the heart valve in an unexpanded configuration; and applying an external non-hydraulic or non-pneumatic actuation force on the anchor to change the shape of the anchor, such as by applying proximally and / or distally directed force on the anchor using a releasable deployment tool to expand and contract the anchor or parts of the anchor.

The methods, devices, and systems are provided for performing endovascular repair of atrioventricular and other cardiac valves in the heart. Regurgitation of an atrioventricular valve, particularly a mitral valve, can be repaired by modifying a tissue structure selected from the valve leaflets, the valve annulus, the valve chordae, and the papillary muscles. These structures may be modified by suturing, stapling, snaring, or shortening, using interventional tools which are introduced to a heart chamber. Preferably, the tissue structures will be temporarily modified prior to permanent modification. For example, opposed valve leaflets may be temporarily grasped and held into position prior to permanent attachment.

This invention relates to hafnium-containing compositions having a zirconium concentration of less than about 500 parts per million, a process for producing the hafnium-containing compositions, organometallic precursor compositions containing a hafnium-containing compound and having a zirconium concentration of less than about 500 parts per million, a process for producing the organometallic precursor compositions, and a method for producing a film or coating from the organometallic precursor compositions. The organometallic precursor compositions are useful in semiconductor applications as chemical vapor deposition (CVD) or atomic layer deposition (ALD) precursors for film depositions.

A seal and a mask having a seal adapted for confronting engagement with a surface of a user to form an interface therewith. The seal includes a first portion defined by a gel substance and a second portion associated with the first portion. The second portion includes a selectively formable substance adapted to be molded from a first pattern into a second pattern and to retain the second pattern responsive to being so molded. The seal and mask having the seal is tailored to patient by causing the formable portion of the seal to be placed in a malleable state, applying the seal to the patient while the formable portion is in the malleable state, and causing the formable portion to be placed in a fixed state to retain a shape generally conforming to the portion of the patient underlying the seal.

A method of forming a partially etched nitride-based compound semiconductor crystal layer includes the following steps. A non-crystal layer of a nitride-based compound semiconductor is formed. At least a part of the non-crystal layer is then etched to form a partially etched non-crystal layer before the partially etched non-crystal layer is crystallized to form a partially etched nitride-based compound semiconductor crystal layer.

The present invention provides compositions comprising polytheylyene-dialkyloxypropyl conjugates (PEG-DAA), liposomes, SNALP, and SPLP comprising such compositions, and methods of using such compositions, liposomes, SNALP, and SPLP.

A capacitor memory is realized, wherein a capacitor stores data and a diode controls to store data “1” or “0”. Diode has four terminals wherein first terminal serves as word line, second terminal serves as storage node, third terminal is floating, and fourth terminal serves as bit line, wherein back channel effect is suppressed adding additional ions in the bottom side of third terminal or applying negative voltage in the well or substrate. A capacitor plate couples to second terminal, which plate has no coupling region to first, third and fourth terminal. With no coupling, the inversion layer of plate in the storage node is isolated from the adjacent nodes. In doing so, the plate can swing ground level to positive supply level to write. As a result, no negative generator is required for controlling plate. Word line and bit line keep ground level during standby, and rise to supply level for read or write operation. In this manner, no holding current is required during standby, and operating current is dramatically reduced with no negative generator. Write has a sequence to clear the state of cell before writing to store data regardless of previous state. Refresh cycle is periodically asserted to sustain data. The present invention can be applied for destructive read, or for nondestructive read adding pull-down device to bit line. The height of cell is almost same as control circuit on the bulk or SOI wafer.

A processing system for depositing a plurality of source materials on a substrate, includes a first thermal evaporation source that can evaporate a first source material to produce a first vapor, a second thermal evaporation source that can evaporate a second source material to produce a second vapor, a vapor mixing chamber that allows the first vapor and the second vapor to be mixed to produce a mixed vapor, and conduits that can separately transport the first vapor and the second vapor to the vapor mixing chamber. The mixed vapor can be directed toward a substrate to deposit a mixture of the first source material and the second source material on the substrate. The processing system can also include vapor filters configured to regulate flows of the first vapor and the second vapor, and a mixed vapor filter to regulate flow of the mixed vapor.

Disclosed is an optical transmission fiber having reduced bending and microbending losses that is commercially usable in FTTH or FTTC transmission systems.

An access port device is provided which enables hand access to a patient's body cavity while retaining pneumoperitoneum by minimizing gas leakage through the access port device. In one embodiment, the access port device includes first and second sleeves forming an inflatable chamber and a third sleeve mounted within the second sleeve including an elastic band for sealingly engaging a hand or wrist. The access port device may also include an exit opening seal for positioning within the patient's body cavity and a second sleeve retraction prevention device for preventing inadvertent movement of the second sleeve outwardly from the patient's body cavity through the incision. In another embodiment, an access port device provided which includes an inner annular sealing device and a non-adhesive outer annular sealing device for creating a non-adhesive seal against the outer surface of a patient. An access component forming an inflatable chamber and including an integral sleeved glove may also be provided. In another embodiment, a sealing force applying feature includes a biasing surface formed on a generally flat annular extension and exposed to gas pressure in an adjacent gas chamber positioned to receive leakage gas leakage between the access port device an the patient to create sealing forces which tend to enhance the seal between the flexible annular extension and patient's skin.

Certain embodiments of the present invention include a retainer, a lid, and a sensor, where the sensor is configured to detect information about the retainer, the lid, or the contents in the retainer. The sensor also may be configured to communicate with an internal or external computer system, thereby facilitating showing the detected information as a representation via a display element. In certain embodiments, the system may include an action element such as an open / close lid opening assembly configured to permit automatically or manually opening or closing a drink aperture or another type of dispensing aperture.