882results about How to "Avoid puncture" patented technology

Apparatus and surgical methods establish temporary suction attachment to a target site on the surface of a beating heart for analyzing electrical signals or hemodynamic responses to applied signals at the target sites for enhancing the accuracy of placement of cardiac electrodes at selected sites and for enhancing accurate placement of a surgical instrument maintained in alignment with the suction attachment. A suction port on the distal end of a supporting cannula carries surface-contacting electrodes and provides suction attachment to facilitate temporary positioning of the electrodes in contact with tissue at the target site, and a clamping and release mechanism to facilitate anchoring a cardiac electrode on the moving surface of a beating heart at a selected site. Analyses of sensed signals or responses to applied signals at target sites promote epicardial mapping of a patient's heart for determining optimum sites at which to attach cardiac electrodes.

A safety port needle assembly used to connect an IV line to an implanted port needle receiving port. The assembly includes an L-shaped port needle with an integrally attached horizontal leg member, a vertical leg member, an elongated, fixed main body and a pivotally attached needle arm. The horizontal leg member is longitudinally aligned and attached to the needle arm. The vertical leg member extends downward perpendicular to the longitudinal axis of the needle arm. A channel is formed in the main body that enables the needle arm to rest longitudinally against the main body. A bore is also formed in the main body so that the vertical leg member may extend downward through the main body. Formed near the distal end of the main body is a pair of laterally extended wings.

A safe detained needle is disclosed. The safe detained needle of the present invention comprises a detained trocar, a trocar seat, a puncture needle, a protective seat, and a needle seat. The protective seat comprises a through hole, a rebound unit, and a sticking plate. When the puncture needle is withdrawn from the detained trocar and the trocar seat, the tip of the puncture needle is restricted in the protective scat by the rebound unit and the sticking plate for preventing the tip of the puncture form being exposed outside.

A warming device for an IV fluid line according to the present invention includes a warmer unit and a wye type fitting with an injection site. The warmer unit includes a tube for intravenous fluid and channels containing a warming fluid to heat the IV tube. One fitting branch is connected to an intravenous fluid source, while the remaining branch houses the injection site. The injection site branch includes an injection safety member that ensures a syringe needle or other instrument is contained within the fitting to prevent rupture of the IV tube. The warming device may include an additional wye type fitting coupled to the initial fitting and including another injection site, where the fittings typically exclude the safety member. A syringe needle is inserted into the additional injection site to prevent rupture of the IV tube. In addition, the warming device may be configured for needleless injections.

The invention discloses a lithium cathode used for a lithium battery and provided with a sandwich structure and a preparation method thereof. The lithium cathode is provided with the sandwich structure formed by a conductive current collector, a metal lithium layer and a high polymer material layer. The method for preparing the lithium cathode comprises a first step of preparing an electrode precursor by compounding a high polymer material and the conductive current collector; and a second step of causing metal lithium to enter an intermediate layer of the electrode precursor to form the lithium cathode with the sandwich structure. By introduction of the high polymer material as a protective layer, growth of metal lithium dendrites can be inhibited, the safety of the lithium battery is improved, the volume expansion in the lithium battery cyclic process can be adapted, and an effect of stabilizing an interface is achieved. In addition, the conductive high polymer material can form a conductive network on the surface of the lithium cathode, lithium ions are induced to be deposited evenly, and a buffer effect on the lithium ions can also be achieved under the conditions of high-current charging and discharging. The method is simple to operate, low in cost, has easiness in large-scale production and has great potential application values in the lithium battery.

A system and method for regional anesthesia using ultrasound to assist in locating the anesthetic needle are disclosed. One or more piezo-electric crystal transducers is placed either at the tip of the needle or near the tip of the needle on a stylet which is inserted into the lumen of the needle. The transducer(s) are pulsed with ultrasonic frequency, the reflected ultrasonic signals from structures are detected and converted into a digital signal and may be displayed in an oscilloscopic format to indicate anatomical structures forward to the needle and allow the medical professional to avoid errors and/or increase efficiency and accuracy. An array of transducers can be pulsed in a phased array fashion to generate a 2D image, or a single transducer can be pulsed to generate a 1D image. A 2D image can also be obtained by mechanically sweeping a single transducer, for example by means of a miniature motor in or at the base of a needle or stylet.

The invention discloses a covered stent for an aortic dissection surgery, a delivery device and a use method thereof. The stent comprises a main body, wherein the main body decreases progressively from the heart near end with a large diameter to a far end with a small diameter, and the superior border of the middle piece of the main body is a rotary island; a tectorial membrane is arranged except the rotary island, and the two ends of the main body and the rotary island are provided with positioning marks. The delivery device comprises a delivery sheathing canal, a suture and a traction guide wire, wherein the suture is sewn on the outer side surface of the covered stent, and the two side edges of the covered stent at the near end of the left subclavian artery are sewn up by the suture; the stent is closed up to be in a semi-contraction state by the traction guide wire through the suture, and the covered stent is closed up and wrapped in the delivery sheathing canal; the delivery sheathing canal is provided with a steeple, and the far end of the traction guide wire penetrates through the handle of the delivery sheathing canal and is fixed. The covered stent for the aortic dissection surgery is used for a dissecting aneurysm surgery of the lesser curvature side of aortic arch and an interventional minimally invasive surgery of an aortic dissection near the brachiocephalic trunk, so that the trauma of a thoracotomy is avoided, and the athe lumen crevasse occlusion is directly implemented.

The invention relates to preparation of an anode material of a lithium battery, in particular to a preparation method of the anode material of an Al2O3-cladding manganese-based laminated lithium battery. The preparation method comprises the following steps of: preparing (Ni0.166Co0.166Mn0.688)(OH)2 precursor particles; preparing Li(Li0.20Ni0.133Co0.534)O2 with a laminated crystal structure by a high-temperature solid phase method; and enhancing the performance of a Li(Li0.20Ni0.133Co0.534)O2 particle product by Al2O3 cladding. The invention has the advantages of larger energy ratio of the product thereof than lithium cobaltoxide, low cost, good safety when the product is used as the anode material, long service life of the product, and higher charging/discharging specific capacity and cycle life as well as better safety of the particles of the Al2O3-cladding manganese-based laminated crystal structure.

The invention discloses a polyester flat microporous membrane and a preparation method thereof. The microporous membrane comprises the following materials in percentage by mass: 60-99.9% of polyester and 0.1-40% of modifier; or 20-40% of non-woven fabric, 60-79.9% of polyester and 0.1-30% of modifier. The preparation method is realized on the basis of a thermally induced phase separation process and comprises the following steps: mixing the polyester, the modifier and diluter into a homogeneous solution at high temperature; scraping the homogeneous solution into a liquid membrane, cooling andcuring into a membrane so as to form a precursor membrane subject to microphase separation, and extracting to obtain a flat microporous membrane. The prepared polyester flat microporous membrane is in a spongeous structure with the pore diameter of 0.05-5.0 micrometers and the porosity of 30-80%, and has the advantages of narrow pore diameter distribution, uniform pore size, easily controlled pore size, high strength, symmetrical structure and the like, thereby being a filter membrane material for water treatment and a lithium ion battery diaphragm material with high performance, low cost andlong life.

The invention relates to a polyethylene composition, specifically to a highly-transparent polyethylene composition and a preparation method thereof. The highly-transparent polyethylene composition comprises a matrix resin and a processing auxiliary agent, wherein the matrix resin is prepared by co-mixing first mLLDPE, second mLLDPE and high pressure LDPE. The composition has characteristics of good strength, good flexibility, good processability, good aging resistance, low odor, excellent gloss, excellent impact strength, excellent tensile strength and excellent tear strength, can be used for preparing composite package films with excellent comprehensive performances, and can be provided for avoiding phenomena such as scratch, puncture and breaking by external force due to insufficient performances such as tear resistance and the like during the use process. In addition, after the mLLDPE resin and the normal resin are blended, the thickness of the film is reduced, the comprehensive performance is excellent, the product cost is reduced, and the processability of the composition is improved.

An insect toxic bait dispenser has a top with multiple downwardly opening compartments in which toxic bait fluids may be retained by an underlying foil barrier. The top is supported on a base with posts positioned beneath the barrier. Base prongs extend into a top shaft with ledges at different heights, preventing part separation when the barrier is intact above the posts, and, when the top is closed on the base, piercing the foil seal and dispensing liquids into fluid retaining members held in base pockets. To use, a peripheral tear strip is removed from the base, permitting the top to descend on the base causing the posts to puncture the seal, compressing the fluid retaining members against the barrier to receive and dispense toxic bait liquid while retarding the rate of liquid evaporation. The top may be hinged to the base, or urged downwardly by a threaded cap.

A medical apparatus which comprises a sharpened outer needle and a blunt inner needle slidingly disposed within the outer needle is provided. The apparatus also contains a position indicator to indicate the position of the inner needle within the outer needle, so that the user knows whether the inner needle is in a protective or a non-protective position. The position indicator may be a mechanical visual indicator, an electronic visual indicator, a tactile indicator, an audible indicator or any combination of the above.

The invention discloses a flexible array-based brain-computer interface electrode cap, which comprises a flexible electrode cap body. The electrode cap body is internally provided with a plurality of input terminals, and the input terminals are provided with a flexible array electrode. The invention has the advantages that the flexible array-based brain-computer interface electrode cap can be worn comfortably, can be used rapidly and conveniently, and has a high signal-noise ratio, high universality and good stability.

The invention relates to a production method of a lithium ion battery separator paper. The method is characterized by comprising the steps of: preparing raw materials of coniferous wood bleached pulp, a dissolving pulp containing alpha-cellulose of above 90%, and nano cellulose; B, uniformly mixing wood pulp, dissolving pulp and nano cellulose in the mass ratio of 1:1:3, sending the mixed slurry into an approaching system, adding polyethylene glycol oxide C before a high level box or a flow box in a flowing system, and conducting papermaking and forming in a papermaking machine; and D, conducting drying and press polish to prepare the nano cellulose lithium battery separator paper. The nano cellulose lithium ion battery separator paper has improved thermal stability and wettability; and high hydrophilicity and high temperature resistant ceramic coating on the surface of nano cellulose lithium ion battery separator paper can improve the mechanical properties and heat resistance performance of the separator, well prevent diaphragm puncture in the formation of lithium branch crystal, thereby increasing the safety.

The invention provides an array substrate, a preparing method of the array substrate, a display panel and a display device to solve the various poor problems of signal wiring caused by the fact that frame sealing glue in the peripheral area of the array substrate is stressed in the prior art. According to the array substrate, the preparing method of the array substrate, the display panel and the display device, due to the fact that the part, in contact with frame sealing glue, in the peripheral area of the array substrate is provided with a protection layer, the poor problems of signal wiring caused by the fact that the frame sealing glue is stressed can be solved.

The invention provides root-resisting waterproof concrete and a green roof structure. The concrete comprises the following components: 12-26% of cement, 23.0-25.0% of sand, 4.0-5.0% of water, 42.0-48.0% of gravel, 0.034-0.039% of a water reducer, 0.085-0.104% of an active catalyst, 4.0-7.0% of a fiber, 1.0-3.0% of hydrophobic zeolite and 0.34-0.65% of a root-resisting agent. The green roof structure comprises a structural layer, an insulating layer, a protecting layer, a water discharging layer, a filtering layer and a planting layer in sequence from bottom to top, wherein the protecting layer is made of the concrete. The concrete provided by the invention has root-resisting, waterproof and anti-cracking functions, and is long in service life and low in production cost; the green roof structure is simple, convenient to overhaul, smooth in water discharging, and lower in roof bearing pressure.

To provide a syringe with a needle storage mechanism in which the needle storage mechanism is not activated before use. A safety syringe including an injection barrel 1 having a connecting portion 11 at the distal end and an opening at the proximal end thereof, a needle assembly B having an injection needle 5 and a needle base 6 fixed to the proximal end of the injection needle 5 and being connected to the connecting portion 11, a gasket 2 provided liquid-tightly and slidably in the injection barrel, a plunger 3 being connected to the proximal end of the gasket 2 and joining means 21 provided at the distal portion of the gasket 2 or the plunger 3, and joined means 61 provided at the proximal portion of the needle base 6, wherein a joint preventing means 90 which prevents the joining means 21 and the joined means 61 from being joined unintentionally before use, and allows joining to each other when in use is provided.