289results about How to "Avoid piercing" patented technology

A locking screw for an intramedullary nail having at least one transverse hole. The locking screw has a central longitudinal axis and includes a screw shank, which is at least partially provided with an external thread, and a screw head. The diameter of the screw head is greater than the outer diameter of the external thread, and the screw head includes a passage extending generally parallel to the longitudinal axis of the screw and the external thread. The passage is configured to receive a longitudinal wedge element. As a result, any gap between the locking screw and the intramedullary nail is eliminated and the screw is wedged in position in the transverse hole of the intramedullary nail.

A steerable distal support system for accessing stenosis, partial occlusions, or complete occlusions within a body lumen. The steerable distal support system generally includes an elongate member that comprises a proximal portion, a more flexible intermediate portion and a deflectable distal tip. The deflectable distal tip is at a distal end of the elongate body to facilitate directionality and positioning of the steerable distal support system to the target site. Optionally, an expandable centering assembly may be disposed on the steerable support assembly to center and anchor the steerable support assembly within the body lumen.

Devices and methods for the treatment of chronic total occlusions are provided. One disclosed embodiment comprises a method of facilitating treatment via a vascular wall defining a vascular lumen containing an occlusion therein. The method includes providing an intravascular device having a distal portion with a lumen extending therein; inserting the device into the vascular lumen; positioning the distal portion in the vascular wall; and directing the distal portion within the vascular wall.

Various surgical instruments for laparoscopic procedures is provided, which are adapted and configured to aspirate and retract a hollow organ, such as a gallbladder. The surgical instruments can includes a needle body, an anchor that is deployable with respect to the needle body, which is adapted and configured for engaging and retracting the hollow organ. Moreover, an aperture can be provided in connection with the needle body, which is adapted and configured for permitting aspiration of contents of the hollow organ. The anchor can be held within, and deployable from, a lumen of the needle body, or held on, and deployable from, an outside surface of the needle body, for example.

A connector according to the invention comprises a hollow needle fastened to a body. A first tubular receptacle provided with a first foil surrounds a first end section of the needle. A second tubular receptacle provided with a second foil surrounds a second end section of the needle. The tubular receptacles are able to slide on the body. The holding sleeve moves the body toward the first foil over a first piercing stroke to pierce it, and then moves the second foil toward the body over a second piercing stroke to pierce it. In this way there may be obtained simultaneous piercing of the foils and foils or stoppers of containers such as flasks or sachets pressed against the foils, to provide a connection under optimum conditions of sterility.

The invention discloses a tissue hemostasis clamping device, comprising a clamp, a releasing mechanism, a drawing assembly, a handle assembly and an external sheathing canal, wherein the clamp comprises a clamping plate and a connector integrally fixed with a pull-push end of the clamping plate; the pull-push end of the clamping plate and the connector can slide back and forth in a tightening pipe, the connector is buckled with the tightening pipe by a loose-preventing mechanism; the front part of the tightening pipe is provided with a stopper; a clamping arm of the clamping plate is provided with a closing stop; the releasing mechanism comprises a pull-push pipe, wherein the front part of the pull-push pipe is connected with the connector in a manner of connection failure when the front part of the pull-push pipe bears the stress exceeding a predetermined tensile force, while the rear part of the pull-push pipe is fixedly connected with a drawing steel wire; the front part of the connection pipe is connected with the rear part of the tightening pipe by a slipknot, and the rear part of the connecting pipe is fixedly connected with a sheathing tube; and the slipknot connection of the connection pipe and the tightening pipe is relieved by a pull-push pipe through the releasing mechanism. With the adoption of the technical scheme, the device has advantages of simple and reasonable structure, stable and reliable clamping, possible repeated pre-clamping, small volume of the clamp and smooth appearance.

A multiwall vented bag is provided which includes an inner tube formed of a plastic material. The inner tube has an open end initially in an open position and adapted to receive filling material therein and at least one vent opening formed therein. The bag further includes a strip of material positioned adjacent and attached to a preselected region of the inner tube. The preselected region includes the at least one vent opening of the inner tube. The strip also includes at least one vent opening to allow air to pass from within the inner tube, through both the at least one vent opening of the inner tube and the at least one vent opening of the strip. The bag further includes an outer tube positioned to substantially surround outer surfaces of the inner tube. The outer tube is formed of a porous material that allows air released from within the inner tube to pass out of the bag through porous material of the outer tube. A method of forming and using a vented bag are also included.

The invention belongs to aerospace product machining technology equipment and particularly discloses a positioning support device for stir friction welding of a storage box cylinder section circular seam. A central shaft disk is arranged above a rotating base seat, a support ring is arranged in the center of the central shaft disk, a top ring is arranged above the central shaft disk, a connecting disk is arranged above the central support ring, long support rods are arranged outside the connecting disk, a short support rod is connected with the rear end of each long support rod, and internal threaded holes are arranged in two ends of left end and right end of a double-stud structure of an adjusting sleeve and respectively connected with the long support rods and the short support rods; the rotating base seat is a perpendicular long positioning rod and a pressing rod, and a pressing plate is arranged above the pressing rod; and a perpendicular short positioning rod is installed between the short support rods and the rotating base seat. Due to the cyclic structure which is formed by the long support rods and the short support rods is adopted, products on a cylinder section can be positioned and supported, positioning error is effectively reduced, and tolerance requirements of welding can be met, and at the same time, parameters in the welding process are stable, internal stress and deformation are small, and positioning support device is further favorable for preventing weldments from being pierced through by a stirring needle.

The invention provides a polyimide diaphragm for a lithium ion secondary battery and a lithium ion battery, which is characterized in that along the direction of the thickness, the polyimide diaphragm comprises a first surface and a second surface which are communicated by a tortuous pore channel. The tortuous pore channel is formed by mutual connection of through pores. According to a mercury intrusion method, average pore size distribution of the polyimide diaphragm is as follow: the volume of the pores with diameter of 40-280nm accounts for more than 78% of the total pore volume. The diameter distribution of the pores on the polyimide diaphragm provided by the invention is uniform, a large number of small pores are distributed on the porous diaphragm and the pores are communicated in a tortuous manner, thus improving the service life of the prepared lithium ion battery by using the diaphragm as the battery diaphragm, in addition, the diaphragm also has higher thermal stability, thus greatly improving the safety performance of the battery.

A hybrid catheter device for performing cutting action on a region of a tissue, using sequential laser and mechanical cutting processes, and incorporating an acoustic sensor on the end of the device, such that if a pulsed laser beam is used for the laser cutting, the absorption of that beam in the tissue being cut can provide information about the progress of the cut by means of the opto-acoustic effect. Other hybrid catheter devices incorporate blunt protrusions on the end of said device, but having sharp lateral edges, such that rotation of the catheter device generates mechanical cutting action in the tissue. The blunt protrusion ends prevents uncontrolled cutting in the forward motion. Other hybrid catheter devices enable controlled incisions into an organ wall, such as the duodenum, and held in place by means of an inflatable balloon. A dual-wavelength nail fungus treatment hybrid catheter is also shown.

A dental implant is provided that has a proximal-most part, a lateral external surface, and a distal implant portion that extends from a distal implant end along up to 50% of a longitudinal length of the implant. The implant is shaped so as to define a lumen therethrough (a) having at least one distal opening through a distal external surface of the distal implant portion, (b) having a lateral opening through the lateral external surface, and (c) not open to a proximal external surface of the implant within 2 mm of the proximal-most part of the implant. Other embodiments are also described.

The invention provides a composite film material for a lithium battery. The composite film material comprises a polymer film and a conductor particle layer coating the surface of the polymer film in one side. The conductor particle layer contains one or more of particles of an ion conductor material, particles of an ion-electron mixed conductor material and particles of an electron conductor material. The invention also provides a preparation method of the composite film material and an application of the composite film material in a rechargeable metal lithium battery. The invention provides aliquid metal lithium battery and solid metal lithium battery containing the composite film material.

The invention belongs to a machining process device of an aerospace product, and in particular discloses a positioning support device used for stirring, rubbing and welding a circular seam of a flange disc of a top cover of a storage box. The machining process device comprises a positioning supporting rotary support, wherein a circular base plate is arranged above the positioning supporting rotary support; an outer pressing ring is arranged above the circular base plate; round holes coaxial with a central hole at the lower bottom surface of the positioning supporting rotary support are arranged in the circular base plate and a center of the outer pressing ring; a central shaft is arranged inside the hole; the lower end of the central shaft is fixed on the positioning supporting rotary support; an outer clamping ring is arranged on the circular base plate; the outer clamping ring is connected with the outer pressing ring through a fastening structure; and a lock wire nut is arranged at the top end of the central shaft. The outer clamping ring, the outer pressing ring and the unique fastening structure have a positioning clamping function to a whole welding product; the outer clamping ring and the central shaft are concentric so as to have a function of positioning a rotation center; a design of the fastening structure has a transition function to connection of a whole positioning support device in a mode that bearing outer pressure is converted into a clamping force, and thus the machining process device is applicable to requirements on high precision in welding and assembling.

The invention relates to a vegetation support (10) consisting of a mat of entangled organic fibers (14) which form said vegetation support (10). A substrate (20) is introduced into the hollow spaces of the mat (12) and a plant material (22) able to germinate, especially seeds, spores, sprouts or the like, is planted on an upper side (16) of the mat (12). The fibers (14) of the mat (12) are secured against detachment from the mat (12). The inventive vegetation support (10) is characterized in that the mat (12) fibers (14) are coconut fibers and that a plant-compatible binding agent (28) is used to prevent the fibers (14) from becoming detached from the mat (12). The binding agent is applied to the surfaces of at least a part of the fibers (14) and ensures that the fibers (14) of the mat (12) are at least partly glued to each other.

Contraceptive methods, systems, and devices generally improve the ease, speed, and reliability with which a contraceptive device can be deployed transcervically into an ostium of a fallopian tube. A distal portion of the contraceptive device can function as a guidewire. The proximal portion may remain in a small profile configuration while a sheath is withdrawn proximally, and is thereafter expanded to a large profile configuration engaging the surrounding tissues.

The invention discloses a novel digestive tract hemostatic clamp capable of being repeatedly closed. The novel digestive tract hemostatic clamp comprises a metal chuck, a release component, a conveying component and a handle, wherein the metal chuck comprises a clamping plate and a connector; the connector and a push-pull end of the clamping plate are sleeved into a whole; the push-pull end of the clamping plate and the connector can slide back and forth in a tightening pipe; a wing part is arranged on the clamping plate; a limiting pin is fixed on the front part of the tightening pipe; a concave hole is formed in the front part of the tightening pipe; the release component comprises the content as follows: the front part of a connecting pipe is connected with the rear part of the tightening pipe through a movable buckle; the rear part of the connecting pipe is fixedly connected with a spring pipe; a half-surrounded hole which loses efficacy in relatively large tension is formed in the front part of a connecting rod, and is connected with a fixed pin of the connector; a convex circular truncated cone is arranged on the front part of the connecting rod; a counter bore in the rear part of the connecting rod is fixedly connected with a traction steel wire; the conveying component comprises the traction steel wire, a protective hose and the spring pipe; the spring pipe is provided with a thin-wall conduit in a thermal shrinkage manner; a boosting pipe is fixedly connected with the traction steel wire. The novel digestive tract hemostatic clamp has the characteristics of being simple in structure and reliable to clamp, and is capable of opening and closing for a plurality of times.