A catheter system and method for achieving total cardiopulmonary bypass during heart surgery. A venous perfusion catheter is inserted peripherally into a preselected vein where it is advanced and positioned at the atrio-caval junction. The venous perfusion catheter has first and second balloons which when inflated respectively occlude the inferior and superior vena cava thereby precluding blood fl...

Cardiovascular and other medical implants fabricated from low-modulus Ti-Nb-Zr alloys to provide enhanced biocompatibility and hemocompatibility. The cardiovascular implants may be surface hardened by oxygen or nitrogen diffusion or by coating with a tightly adherent, hard, wear-resistant, hemocompatible ceramic coating. The cardiovascular implants include heart valves, total artificial heart impl...

A catheter has an inner tube for forming a drug supply channel, and an outer tube for receiving the inner tube. Separation walls extend between the inner and outer tubes for forming a plurality of supply channels for supplying fluid. A balloon is mounted outside the outer tube and has a plurality of separation walls extending between the outer tube and the balloon for forming multiple compartments...

A small diameter wire guide for medical procedures. The wire guide includes a mandrel of metallic superelastic material, such as nitinol, having a diameter less than 0.020 inches and which completes its transformation to austenite at a temperature of about 14.degree.C. The marldrel llas a collstant diameter over a majority of its length and includes a number of tapered portions and reduced-diamete...

An apparatus and method for surface treatment of a substance to be processed, which are capable of decreasing the number of foreign matters holding on the reverse side of the substance more than prior art like apparatus and method without largely decreasing a surface treating speed as compared with that of the prior art, by supplying ozone gas to the surface of the substance mounted on a supportin...

Nucleic acid oligonucleotide probes or primers that hybridize specifically and exclusively to two regions of the pol gene, identified as LV I and LV II, conserved among a wide range of lentiviruses, wherein the preferred amino acid sequences of the conserved regions are: PHPX1GLX2KX3X3X4X5T wherein X1=A, P or G, X2=K or A, X3=K or R, X4=S or R, and X5=V or I; and WX1GX2X3LX4PX5KWX6 wherein X1=M, L...

An enclosure (35) of a loudspeaker (37) is provided with a plurality of tubes (43) of different length via which the sound is emitted in order to achieve frequency spreading of resonance peaks in the SPL (sound pressure level) curve. The side walls (46, 47) of the tubes (43) have openings (63) via which the tubes are coupled to common Helmholtz resonators (59, 61) in order to suppress undesirable ...

A Si material mixed with Group-V element is melted in a crucible, and then held in a chamber filled with a rare gas at atmospheric pressure of 100 torr. or higher. A rare gas, e.g. Ar, Kr, Xe or Rn, having a large mass or the mixture of Ar with Kr, Xe or Rn may be used as atmospheric gas. The high-pressure atmosphere suppress the evaporation of oxides of Group-V elements from the Si melt, so that ...

A solid layer is melted from the upper part thereof by the heat of a heater while the contact area between a molten liquid layer and an inner wall of a crucible is adjusted in a Double Layered CZ method, so that the eluting amount of oxygen from the crucible to the molten liquid layer is controlled. Accordingly, silicon single crystals of the low concentration of oxygen are produced.

A process and an apparatus reduces the oxygen incorporation into a single crystal of silicon which is drawn by the Czochralski method. If a molding is immersed at least temporarily in the melt between the single crystal and the crucible wall during drawing of the single crystal, the oxygen content of the single crystal is reduced compared with the oxygen content of a single crystal which has been ...

Apparatus for processing semiconductor wafers includes a load lock chamber with a first gate valve and a second gate valve so as to load and unload cassettes through the first gate valve, and to convey the wafers from the load lock chamber to a plurality of processing chambers through respective second valves. The load lock chamber is provided with a turntable which holds the plurality of cassette...

A point of use slurry dispensing system with controls for dilution, temperature and oxidizer/etchant/additive infusion. A slurry in unmixed form and a diluting agent are independently pumped to a pad on a CMP tool. Liquid heaters are used to heat the slurry and the diluting agent to a desirable temperature. The actual mixing occurs at the point of use on the pad or in a dispensing line just prior ...

A method and apparatus are provided for determining bond integrity of a seal container having a lid bonded to the rim of the container. The integrity of the bond is determined by detecting flaws therein, between the lid and the container rim. The system method comprises the steps of: i) positioning the container rim between an ultrasonic transmitter system and an ultrasonic receiver system. The tr...

A multi-function differential pressure sensor includes a semiconductor chip, a stationary base having a joining portion joined to a thick wall portion of the semiconductor chip, and a housing joined to the stationary base. The semiconductor chip is provided with a differential pressure detection unit, a static pressure detection unit, and a temperature detection unit. The joining portion of the st...

An ink-jet printer having improved print quality and full color printing capability on plain paper media. A radiant print heater heats the medium at the print area to increase the ink carrier evaporation rate. The heater includes a wire heating element placed in a reflectorized cavity beneath the printing area, and radiant heat energy is directed onto the lower surface of the print medium through ...

A head-mounted display apparatus wherein an image displayed on an image display device is projected on an observer's eyeball, which is designed so that the displayed image can be observed at a desired angle of view and at a desired magnification by making the projection magnification changeable. The head-mounted image display apparatus includes an image display device (11) for displaying an image,...

A portable apparatus useful for close range physical examinations, in particular for use as a colposcope, is described. The portable apparatus includes a stereoscopic optical unit, a main frame lens holder, an auxiliary frame lens holder, a light and mount therefor, a filter and mount therefor, and support structure which allows the component parts to be maintained in precise optical alignment and...

The invention relates to a disc brake with a brake caliper (10) which can be moved on a fixed bearer (14) by at least one axial guide pin (12), with an actuating device which acts on a first brake shoe (16) via a pressure member (52) and as a reaction via the brake caliper (10) on a second brake shoe. An actuation device (20) acts via a piston rod (26) on a pivot lever (30) which rotates about an ...

Process for the preparation of dimethylcarbonate which consists in feeding oxygen and a mixture of methanol and carbon monoxide to the reactor, with a molar ratio methanol/carbon monoxide of between 1 and 2, this mixture coming directly from the non catalytic direct oxidation of methane with oxygen characterized in that the above molar ratio between methanol and carbon monoxide, with fixed tempera...

A method and an apparatus are provided for detecting a current residual capacity of a battery employed in an electric vehicle, such as an electric car. During a charging process, a value of the charge current of the battery is measured and an estimated discharge voltage corresponding to a current battery accumulated power is determined. A power of the battery as a product of the value of the charg...