41results about How to "Reduced puncture resistance" patented technology

The invention discloses a safe medical needle comprising a needle tubule. A second inclined plane and a first inclined plane are positioned at the front end of the needle tubule, and the axial length L1 of the first inclined plane is shorter than the axial length L2 of the second inclined plane; the length L2 of the second inclined plane is preferably 65-75% of the total length L of the two inclined planes, and a small concave arc extending backwards is positioned at an inner point of the needle on the first inclined plane, and the inner point is adjacent to the top end of the arc line. Based on the structure of the former needle, the length L2 of the second inclined plane extends towards the first inclined plane, and a small concave arc is formed on the top end of the arc line of the inner point of the needle by fine grinding, sand blasting or laser beam heat treatment, thus the resistance against insertion of the needle head is reduced, absolute safety is ensured as human organism is not affected, needle insertion is more smooth, amount of bleeding is reduced, and pains of patients can be relieved. The medical needle is a really safe medical needle and can replace all the existing medical needles used in various situations.

An aluminum alloy sheet is a sheet of a specific 3000 series aluminum alloy for can bodies formed by drawing and ironing (DI). For producing the alloy sheet, the soaking conditions and hot rolling conditions for the ingot are controlled to produce a cold-rolled sheet having a structure in which the amount of a coarse Mn-based intermetallic compound is a specific value or less and a certain average amount of Mg in solution is ensured. The can body formed therefrom by DI has excellent piercing resistance even when used in a severe environment in which the can body has a lower internal pressure.

The invention discloses a thyroidectomy lacuna tractor of an oral approach endoscope. The tractor comprises a rod body and a hook connected to one end of the rod body, wherein the hook is V-shaped andis of a hollow tubular structure, the hook comprises a puncture part in a straight tube shape and a traction part, bottom ends of the puncture part and the traction part are smoothly connected through an arc connecting part, a beveling needle point is arranged at the top end of the puncture part, and the top end of the traction part is connected with the rod body; and a handle is arranged at oneend, away from the hook, of the rod body. According to the thyroidectomy lacuna tractor of the oral approach endoscope, the tube diameter of the hook is small, so that tractor punctures easily, can easily pull strap muscle, cannot shield the surgery field and has a good exposure effect.

A sewing machine needle capable of preventing stitch skipping and fabric yarn breakage, irrespective of high-speed and multifunction sewing machines and diversified materials being used. Over a predetermined length from an edge, closer to a needle point, of a needle eye toward the needle point, a blade has a straight profile extending parallel to a longitudinal axis of the needle as viewed from a side of the needle in a direction orthogonal to a direction in which the needle eye extends. Over a predetermined length from the straight profile portion toward the needle point, the profile of the blade is a flat cross-section in which the thickness thereof in the direction in which the needle eye extends is larger than the width thereof in the direction orthogonal to the direction in which the needle eye extends. In a needle point portion following the flat cross-section portion and extending to the needle point, the blade has a sectional shape of a perfect circle.

The invention discloses a disposable sterile safe injection needle which comprises a syringe needle thin tube, a first inclined surface forming a 15-degree angle with an axial surface of the thin tube and a second inclined surface forming at 18-degree angle with the axial surface of the thin tube, wherein the width between two arc top ends of a crescent-moon-shaped cross section of the first inclined surface formed on the tube wall portion is equal to the standard thickness of the tube wall, an inner blade, a left blade and a right blade of the cross section are round fillets, and no burrs exist on a plane of the cross section. The disposable sterile safe injection needle cannot pick up tissue of human bodies or bring out fractionation, cannot damage the strength of a syringe needle, is truly safe, and can be used for replacing various medical syringe needles used in various occasions.

The invention discloses a single- chamber oocyte collector, comprising a puncture needle, a handle, a catheter sleeve, a suction catheter and a silicone plug which are connected in turn; the siliconeplug is connected with a conical joint through a vacuum catheter; a protective sleeve is sleeved on the puncture needle; the puncture needle comprises a needle tube and a needle tip connected with theneedle tube; an ultrasonic development enhancement band group is arranged on the outer wall surface of the needle tube; equal diameter needle tube is used for needle tube; the group of ultrasound development enhancement bands includes several ultrasound development enhancement bands; each ultrasound development enhancement band is constituted by a linear groove group arranged along an axial direction of the needle tube; the curve of the linear groove group is a periodically changed curve; and the outer wall surface of the needle tube is machined adopting an ultrashort pulse laser to form thelinear groove group. The single-chamber oocyte collector of the invention enables the ultrasonic imaging of the puncture needle to present a light-dark alternating scale, and is easy for the operatorto directly observe the needle feeding depth on the display screen of the ultrasonic imaging system in real time during operation, so that the operation is more accurate.

The invention relates to a myocardium ablation device capable of ablating cardiac muscle tissue point by point. The myocardium ablation device comprises a sleeve, an inner core, a fornices and a negative pressure suction pipeline. A first hollow pipeline is formed inside the sleeve, and the negative pressure suction pipeline is embedded on the side wall of the sleeve; the far side of the inner core is provided with the tip, and a liquid injection interface is arranged on the near side; the inner core is provided with a body, the body is provided with a second hollow pipeline, the body is configured to move inside the first hollow pipeline, and the second hollow pipeline is communicated with the liquid injection interface; one or more negative pressure suction cups are arranged on the innerside wall of the fornices, and the interior of the side wall is provided with a third hollow pipeline, and the third hollow pipeline is communicated with the negative pressure suction pipeline at thenear end of the fornices; the near side of the negative pressure suction pipeline is provided with a negative pressure interface for being connected with a vacuum generation device. The myocardium ablation device can be used for mapping cardiacelectrical activity.

The invention provides a disposable self-adaptive puncture avulsion sheath. The sheath comprises a sheath canal, canal plugs and a canal seat, the canal seat is formed by splicing two tearable parts, and a containing cavity is formed in the canal seat; the canal plug communicated with the containing cavity is arranged on each tearable part; the upper end of the sheath canal enters the containing cavity from a lower port of the containing cavity and is fastened through the canal plugs; and the top of the canal seat is of a Luer taper structure. By adopting the structure that the sheath canal is naturally cracked, the problem that the sheath canal needs to be punctured and replaced for many times when puncture needles and ablation needles of different models are used is solved, and puncture and ablation positioning is more convenient and efficient. The canal seat is connected with a puncture needle Luer taper, so that the stress is uniform and stable in the puncture process. The tail of the sheath canal shrinks and is in smooth transition to be attached to the puncture inner needle, puncture resistance is conveniently reduced, and puncture is facilitated. A canal seat groove and a canal seat groove buckle are fastened, so that the problem of mistaken tearing is solved. The sheath canal is fixed by pressing and riveting the canal plugs and the canal seat, so that the problem that the sheath canal is not firmly fixed is solved.

The invention relates to an ultrasonic guided puncture needle device. The ultrasonic guided puncture needle device comprises an outer puncture needle and an inner puncture needle, wherein the outer puncture needle is of a hollow structure, the inner puncture needle is of a solid structure, and the outer puncture needle is arranged on the inner puncture needle in a sleeving mode and can move relatively and freely; a plurality of crescent outer needle grooves protruding towards a needle tip are formed in the surface wall, corresponding to the needle tip inclined plane side, of the position, close to the needle tip, of the outer puncture needle, and the outer needle grooves are obliquely arranged in the mode of being not perpendicular to the axis of the outer puncture needle; a plurality of crescent inner needle grooves protruding towards the needle tip are formed in the surface wall, corresponding to the needle tip inclined plane side, of the position, close to the needle tip, of the inner puncture needle, and the inner needle grooves are obliquely arranged in the mode of being not perpendicular to the axis of the inner puncture needle; and when the needle tip inclined plane of the outer puncture needle is flush with the needle tip inclined plane of the inner puncture needle, the inclination direction of the outer needle grooves is opposite to that of the inner needle grooves. The ultrasonic guided puncture needle device is ingenious in structure and reasonable in design, the reflection section of the whole puncture needle device can be greatly increased, ultrasonic reflection is better facilitated, and therefore the puncture needle device can display more clearly under ultrasound.

The invention relates to the technical field of rubber composite materials, in particular to a graphene modified rubber composite material for a tire tread and a mixing method of the graphene modified rubber composite material. The graphene modified rubber material is prepared from the following raw materials: a matrix rubber material, a modified graphene material, a vulcanizing agent, a flow promoting agent and the balance of an organic solvent, the modified graphene material at least comprises the following raw materials: graphene powder, polyvinyl chloride powder, vinyl acetate, talcum powder and the balance of N, N-dimethylformamide solution and water; according to the graphene modified rubber composite material for the tire tread and the mixing method of the graphene modified rubber composite material, the added modified graphene material is physically modified by blending the graphene with the polyvinyl chloride, so that the mechanical property of the graphene material is improved, and the characteristics of the polyvinyl chloride are introduced into the matrix rubber material for blending through the graphene; the strength and the hardness of the composite material can be improved, and meanwhile, the abrasion loss and the puncture resistance of the composite material can be reduced, so that the composite material can be better applied to a tire table top.

The invention discloses an abdominal wall suturing device. The abdominal wall suturing device comprises a needle core and a needle tube. An edge is formed at the front end of the needle tube. The front end of the needle tube is of an openable Y-shaped structure. The Y-shaped structure comprises two elastic opening and closing arms and a needle bar. The two elastic opening and closing arms are both connected with the front end of the needle bar. A needle hook is arranged at the front end of at least one elastic opening and closing arm. The needle bar penetrates the needle tube. By the adoption of the abdominal wall suturing device, use is convenient, rapid picking and fixing of sutures are facilitated, and the sutures can be fed into and dragged out of an abdominal cavity conveniently.