Abstract: An improved assembly, composed of a hard member and a soft tube fitted onto the hard member, for medical uses is formed with a plurality of projections on the side wall of a flange of the hard member. The projections project toward the soft tube side to firmly hold the foremost end part of the soft tube between the projections and a fitting portion of the hard member in a clamped state when the soft tube is fitted onto a fitting portion of the hard member. The foremost end surface of the soft tube may slantwise be cut to define a certain angle relative to the center axis of the assembly such that the foremost end part of the soft tube comes in tight contact with the side wall of the flange when the soft tube is fitted onto the fitting portion of the hard member. The soft tube may be formed with a plurality of cutouts which are arranged along the periphery of the foremost end surface of the soft tube in a spaced relationship.

Abstract: A catheter is provided which can be safely implanted in the living body for extended periods of time. At least that portion of the catheter which contacts the tissue comprises a cuff of porous material which is made of a vinyl alcohol polymer to which, preferably, collagen has been chemically grafted.

Abstract: An improved infusion needle device of the type including a liquid delivering passage and an air introducing passage extending in parallel with each other includes a tubular needle, a bottom portion into which the rear part of the tubular needle is immovably fitted, a flange portion made integral with the bottom portion, a cover member airtightly secured to the flange portion and a valve disc received beneath a circular projection on the flange-shaped part of the cover member. As air enters through an air inlet port on the flange portion, the valve disc is raised up so that air is introduced into the interior of the parenteral liquid container via a cutout on the circular projection, a clearance between the bottom portion and the cover member and an annular clearance between the tapered foremost end of the cover member and the tubular needle.

Abstract: Braided multifilament sutures exhibiting excellent tie-down performance and knot security are provided. The sutures of the invention comprise synthetic, textured braided sutures coated with a coating composition for lubricating the sutures.

Abstract: An absorbent for absorbing free hemoglobin from blood is provided, which comprises a water insoluble porous carrier having phenyl and/or phenol groups on the surface of the carrier. The phenyl and/or phenol groups may be a constituent of the carrier itself, or they may be a constituent of a separate compound affixed to the carrier surface, directly or through use of a coupling agent. Also provided is a method for absorbing free hemoglobin from whole blood or separated plasma which includes contacting the whole blood or plasma with the absorbent.

Abstract: Plastic molded articles having characteristic properties of both shape-memory and biodegradability and a process for preparing the same are disclosed. The molded products consist of homopolymers of lactide or glycolide or copolymers of lactide and glycolide. The molded articles of this invention are particularly useful for a variety of medical devices.

Abstract: A synthetic vascular prosthesis comprises a hollow tubular base member having a multitude of continuous pores and formed of an elastomer material, and a hydrogel layer formed on the inner surface of the base member. The hydrogel layer is partly embedded in the inner portion of the base member at the pores, thereby permitting anchoring adhesion between the hydrogel layer and the base member. A method for manufacturing the synthetic vascular prosthesis is also disclosed, in which the formation of pores in the base member is effected by two separate steps and the hydrogel layer is formed after formation of an inner porous portion of the base member.

Abstract: A protective cover for sealing ports mounted to a plastic bag is disclosed. The ports can be observed through the protective cover and the protective cover can be easily removed from the port with one hand. A tab is welded on one side of the protective cover and is tapered toward the hub of the port. The tab is welded to the protective cover by heat and has a flat, smooth surface so that it becomes transparent or semi-transparent.

Abstract: A synthetic vascular prosthesis comprises a hollow tubular base member having a multitude of continuous pores and formed of an elastomer material, and a hydrogel layer formed on the inner surface of the base member. The hydrogel layer is partly embedded in the inner portion of the base member at the pores, thereby permitting anchoring adhesion between the hydrogel layer and the base member. A method for manufacturing the synthetic vascular prosthesis is also disclosed, in which the formation of pores in the base member is effected by two separate steps and the hydrogel layer is formed after formation of an inner porous portion of the base member.

Abstract: A suture coating composition comprising a sucrose fatty acid ester and sutures coated therewith whereby said sutures exhibit improved smoothness in tie-down properties and knotting can be readily accomplished using said suture.

Abstract: Plastic resinous tubes, particularly for medical use is improved in blood compatibility when brought into contact with blood, by applying a low-temperature plasma treatment to inner surfaces of the tubes, which plasma is produced through electrodeless electric discharges by the effect of microwave to make it possible to prevent the tube from being heated in such a treatment. The inner surfaces of the tubes thus activated may be further subjected to an inner surface graft copolymerization treatment to enhance blood compatibility.

Abstract: A highly blood-compatible material comprising a polymeric base material and water-soluble and substantially nonionic polymer(s) directly attached to the surface of the base material in an amount of 1 to 100 .mu.g/cm.sup.2. The polymeric base material is preferably in the form of a web and composed of polyurethane, ethylene/vinyl acetate copolymer or polyvinylchloride. In addition, the attached polymers may be selected from the group consisting of acrylamide polymers, polyvinylpyrrolidone, polyvinyl alcohol, polyethylene glycol, and dextran. This material is particularly useful for preparing vascular prosthesis of small diameters.

Abstract: A method for decontaminating blood uses an adsorber prepared by forming a porous membrane containing an adsorbent in the form of powder or fine particles on a support is suitable for removing harmful soluble substances contained in blood. The adsorber has a high rate of adsorbtion, and does not readily shed the fine particles of the adsorbent material. In order to attain these features, it is necessary to set the thickness of the porous membrane within a specified range.

Abstract: A sterilization method and apparatus comprise a coil connected to a high-frequency current generating source to generate a magnetic field in which a device to be sterilized is disposed so that an eddy current is generated in a conductor forming the device or a conductor disposed in the vicinity of the device due to the electromagnetic induction action, whereby bacteria attached to the device is sterilized by heat produced by the eddy current loss. The sterilization method and apparatus is suitable for a device such as a tubular connector for connecting between the abdominal cavity and a disposable container containing a dialysate in the peritoneal dialysis, specifically the continuous ambulatory peritoneal dialysis and which is repeatedly used while exchanging the container.

Abstract: An adhesion preventive for preventing adhesion between vital tissues is provided. The present adhesion preventive is a molded material consisting essentially of a biodegradable and absorbable polymer. It has an advantage of requiring no reoperation for its removal since it would be degraded and absorbed after completing its function in vivo.

Abstract: An infusion apparatus is provided which can give an infusion with high precision and which allows each changing of the infusion capacity. The apparatus includes a first burette and a second burette connected in series. The burettes communicate with each other through a connector which can be selectively opened or closed by directional control valve means.

Abstract: A tubage for use in an intubation is provided. The tubage comprises a tubular body having a first conduit and a second conduit which are formed therein to extend in a longitudinal direction, a flange portion formed to extend substantially perpendicular to the longitudinal direction and a side hole which is formed in the first conduit at a predetermined distance from the flange portion.

Abstract: An artificial lung having first and second oxygen blowing stages formed therein. The device comprises an outermost blood reservoir tube having top and bottom walls formed thereon, a plurality of oxygenation tubes disposed coaxially with the blood reservoir tube defining passages for blood therebetween, a first oxygen blowing stage formed under the oxygenation tubes for blowing oxygen gas into the blood introduced through an inlet for blood and a second or auxiliary oxygen blowing stage formed around the first oxygen blowing stage.

Abstract: An artificial lung provided with a built-in heat exchanger comprising an outer cylindrical member, an inner cylindrical member and an intermediate cylindrical member disposed between said outer and inner cylindrical members.A plurality of tubes are disposed within said inner cylindrical member through which a heat exchange medium is adapted to pass. The supply of oxygen to the blood is carried out within the inner cylindrical member while heat exchange is performed between the blood and the heat exchange medium.