34results about How to "Prevent blood flow" patented technology

A valve prosthesis includes one or more anti-paravalvular leakage components coupled to a stent. The anti-paravalvular leakage component may encircle the stent and include a radially expandable control ring coupled to an unattached edge of a flexible skirt which extends the unattached skirt edge outwardly away from the stent and against the native heart valve to form an open-ended annular pocket around the stent. The anti-paravalvular leakage component may encircle the perimeter of the stent and include a flexible skirt having opposing edges coupled to the stent to form one or more enclosed compartments around the stent. Each compartment includes a one-way valve which allows for blood flow into the compartment but prevents blood flow out of the compartment. The anti-paravalvular leakage component may be at least one flap that is coupled to an inner surface of the stent and formed of a flexible material moveable by blood flow.

A system for treating abnormalities of the right ventricular outflow tract includes a prosthetic valve device having a barrier material contacting at least a portion of the outer surface of the valve device. One embodiment of the invention includes a barrier member attached to the exterior surface of the valve device. Another embodiment includes a barrier material that is injected within the vascular system. Yet another embodiment of the invention includes a method for replacing a pulmonary valve that includes forming a barrier around the outer surface of a replacement valve and preventing blood flow around the replacement valve.

A method of protecting an upper body and a lower body of a patient from high venous pressures comprising implanting a first stented valve at the superior vena cava and a second stented valve at the inferior vena cava, wherein the first and second valves are configured to permit blood flow towards a right atrium of the patient and prevent blood flow in an opposite direction.

A method is provided, which includes providing an annuloplasty ring, which comprises (a) a flexible sleeve, and (b) a contracting assembly. During a percutaneous transcatheter procedure, the flexible sleeve is placed entirely around an annulus of a mitral valve of a subject in a closed loop. The sleeve is fastened to the annulus by coupling a plurality of tissue anchors to a posterior portion of the annulus, without coupling any tissue anchors to an anterior portion of the annulus between left and right fibrous trigones of the annulus. Thereafter, a longitudinal portion of the sleeve is contracted. Other embodiments are also described.

The present invention involves an expandable element with an outer sticky surface. The expandable element may be in the form of a balloon with deflated and inflated configurations. The expandable element serves to both dilate a lumen in a blood vessel thereby opening it and to exert force upon the sticky surface in order to press it into apposition against a vessel wall. The outer sticky surface may be provided directly upon the expandable element or on a separate outer sheath that conforms to and follows the contours of the expandable element. The sticky surface may take the form of a biochemical composition and/or a mechanically abrasive structure such as microhooks, hairs, mesh netting, etc. Optionally, additional expandable elements may be provided proximal and distal to the main element to occlude blood flow on either side of a lesion in order to better trap emboli for collection.

A medical device for providing retrograde venous perfusion to the cerebral vasculature for treatment of global or focal cerebral ischemia is disclosed. The device includes a catheter having an infusion port at its distal end, venous drainage port(s), and an expandable occluder disposed between the infusion port and drainage port(s). The catheter can be inserted into the superior vena cava or the internal jugular vein. The catheter is attached proximally to a pump and an oxygenator with or without a cooling system. Alternatively, the device includes two catheters, each having a lumen communicating with a distal infusion port and an occluder mounted proximal to the port. The catheters can be inserted into the internal jugular veins distal to jugular venous valves. Methods of using the devices to provide retrograde venous perfusion and isolated cerebral hypothermia are disclosed.

A minimally invasive method that allows for complete obliteration of the affected vessels without scarring or any of the other undesirable complications of conventional or foam sclerotherapy. More particularly, the present invention relates to a method for using a non-foaming thickener to reduce dilution and diffusion of the sclerosant in the blood vessel and enhance the efficacy of the sclerotherapy treatment. The thickener can be thickening agent, hydrogel, environmentally sensitive hydrogel, and self-assembly polymer, etc. After it is mixed with sclerosant and injected into the blood vessel through a needle or a catheter, the compound will replace blood and obliterate the affected vessels.

A suspension trauma relief device includes a member extending from a ring to which the safety harness and lanyard are attached. The member provides a support for the wearer so that the wearer can take his/her weight off of the safety harness, and particularly the leg straps on the safety harness, to allow blood circulation and prevent suspension trauma. Preferably the member includes at least one foot support allowing at least one of the wearer's feet to be placed in the foot support to take the wearer's weight off the safety harness and avoid any constriction of the straps of the safety harness on the person's blood flow.

An integrated blood pressure monitor and pulse oximeter system includes a blood flow occlusion member configured to selectively occlude blood flow through an appendage of the animal (e.g., the neck or tail); a sensor coupled to the blood flow occlusion member detecting a degree of operation thereof; Light sources coupled to the tail closer to the distal end of the tail than the tail blood flow occlusion member, and selectively directing light of two different wavelengths into the appendage; a light receiver coupled to the appendage and selectively receiving a signal associated with light directed into the appendage from the light sources; and a controller configured to selectively determine blood pressure parameters from the data and pulse oximeter parameters from the data.

A deep brain magnetic stimulator is disclosed that is placed within a vessel of the body to provide targeted location specific application of a magnetic field within the brain. The deep brain magnetic stimulator has a stimulation coil affixed to an expandable device core where the device core has a lumen to allow the passage of blood. A source of electrical energy is provided as well as related control circuitry to govern the activation of the stimulation coil and also govern such parameters as magnetic field strength, duration, waveform, and the like.

A debranching stent graft limb and methods for its use, where the limb comprises, a main body stent graft limb with a bifurcation defining a first and second leg, the main body stent graft limb has a distal end and a proximal end, the main body stent graft limb has a diameter at the proximal end in the range from about 14-18 mm, the first leg has a diameter ranging from about 8-12 mm, the second leg has a diameter ranging from about 6-10 mm, and the distance from the proximal end of the main body to the distal end of the first leg and the second leg is in the range from about 70-90 mm, and the diameter of the first leg is about 2 mm greater than the diameter of the second leg.

An apparatus for removing emboli from a vessel during an interventional procedure comprising a catheter. The catheter includes: an elongate member having a lumen extending from the proximal end to the distal end; a dilation element disposed on a distal portion of the elongate member, the dilation element having a contracted state and an expanded state; an occlusion element disposed on a distal portion of the elongate member, the occlusion element being disposed proximal of the dilation element, and the occlusion element having a contracted state and an expanded state; and one or more aspiration ports disposed on a distal portion of the elongate member, the one or more aspiration ports being in fluid communication with the lumen, and one or more of the aspiration ports being disposed proximal of the dilation element and distal of the occlusion element.

A balloon is fashioned in the shape of a modified toroid that changes position by rotation. As a result, the toroidal balloon is an improvement over existing balloons for dilation and applying pressure since it can apply the pressure to both the external surface and the surface lining the balloon's internal channel and change position while applying that pressure. In addition, the toroidal balloon can apply a biologically active substance or medical device to a biological wall then leave that substance or device in place with the rotational extraction of the balloon. Other balloons for dilation or application of a substance or device need to be deflated to change their position.

A visceral double-barreled main body stent graft and methods for its use, the stent graft comprises, a main body stent graft having distal and proximal ends, the main body stent graft's length ranges from about 100-120 mm and diameter at the proximal end ranges from about 30-45 mm, first and second lumens defined at the main body stent graft's distal end, the first lumen's diameter ranges from about 18-20 mm, the second lumen's diameter ranges from about 16-18 mm, the first and second lumens have about the same length from about 50-70 mm, the first lumen is secured to the second lumen along a shared length, and the main body stent graft defines a tubular wall that is contiguous with the first and second lumens such that any fluid entering the main body must exit through one of the first or second lumens.

A debranching Great vessel stent graft and methods for its use, where the stent graft comprises, a main body stent graft with a first bifurcation defining a first leg and a second leg, the main body stent graft has distal and proximal ends, the main body stent graft has a diameter at the proximal end in the range from about 18 mm to about 28 mm, the first leg and the second leg each have a diameter in the range from about 12 mm to about 18 mm, the distance from the proximal end of the main body to the distal end of the first leg is in the range from about 30 mm to about 50 mm, and the distance from the proximal end of the main body to the distal end of the second leg is in a range from about 50 mm to about 70 mm.

The invention discloses a solid beverage for tonifying Qi and strengthening heart and a preparation method of the solid beverage, and belongs to the technical field of processing of health-care beverages in the food industry. The solid beverage comprises the following raw materials in parts by weight: 6 to 15 parts of fructus lycii, 6 to 15 parts of arillus longan, 6 to 15 parts of fructus jujubae, 12 to 25 parts of hawthorn, and 260 to 320 parts of cane sugar. The preparation method is on the basis of the theory of homology of medicine and food, the fructus lycii, the arillus longan, the fructus jujubae and the hawthorn which are the medicinal and edible components achieve compound and compatibility, wherein the fructus lycii has the effects of nourishing the liver, nourishing the kidney and moistening the lung; the arillus longan has the effects of tonifying the heart and spleen, replenishing Qi and blood, and soothing the nerves; the fructus jujubae has the effects of nourishing the spleen and stomach, and harmonizing Yingfen and Weifen; and the hawthorn has the effects of strengthening the stomach and digesting food, and promoting the circulation of Qi and scattering the stasis; the four raw materials under compound and compatibility can achieve the effects of replenishing Qi, strengthening heart, promoting circulation and removing stasis, and tonifying spleen and nourishing Yin. The raw materials are processed by boiling, concentrating, mixing, granulating, drying and sieving by the modern preparation technology, so as to obtain solid particles. The preparation method keeps the fragrance of the raw materials; the solid beverage is sweet and sourish, and has no preservative, so that the edible safety is ensured; and the preparation method is simple in preparation technology, low in producing cost, and suitable for mass production.

A visceral double-barreled main body stent graft and methods for its use, the stent graft comprises, a main body stent graft having distal and proximal ends, the main body stent graft's length ranges from about 100-120 mm and diameter at the proximal end ranges from about 30-45 mm, first and second lumens defined at the main body stent graft's distal end, the first lumen's diameter ranges from about 18-20 mm, the second lumen's diameter ranges from about 16-18 mm, the first and second lumens have about the same length from about 50-70 mm, the first lumen is secured to the second lumen along a shared length, and the main body stent graft defines a tubular wall that is contiguous with the first and second lumens such that any fluid entering the main body must exit through one of the first or second lumens.

A ventricle assist device comprises an inlet for receiving blood, an outlet for discharging blood, and a chamber disposed between the inlet and the outlet. There is also a means for actuating the ventricle assist device between an expanded configuration and a contracted configuration. In the expanded configuration blood flows into the inlet. In the contracted configuration blood flows out of the outlet. There may be a one-way valve at the outlet for preventing blood flow back into the chamber. The one-way valve is a diaphragm valve. The chamber may have a resilient outer wall. The chamber may have an ovoid shape.

A balloon catheter includes a drug-coated balloon having an uncoated region free from drug coating, a displaceable protective sleeve covering the drug-coated balloon and an elongate catheter body that has a distal end and a proximal end. Another catheter has an uncoated region and/or an additional uncoated balloon is on the catheter body. The uncoated balloon or the additional uncoated balloon are mounted to be exposed first when the sleeve is displaced. This blocks blood flow while the drug coated balloon or balloon region is inflated to avoid or minimize release of drug into the blood stream away from the site of treatment.

A false tooth implanting device, having an expandable implant body, a lower protruding block at a recess of a lower portion of the implant body, a vertical screw, and a lateral screw; the recess has a first slanted engaging surface; an upper portion of the expandable implant body is provided with a vertical hole and a first portion of a vertical screw hole; the lower protruding block is provided with a second slanted engaging surface in contact with the first slanted engaging surface and a second portion of the vertical screw hole; the vertical screw passes through the vertical screw hole; the upper portion of the expandable implant body is provided with an expansion crevice and a lateral screw hole; when the lateral screw is screwed into the lateral screw hole, the upper portion of the expandable implant body is widened by expanding away from the expansion crevice.

The invention discloses a blood storage device for extracorporeal circulation in cardiac surgery. A liquid adding pipe penetrates through the upper cover and is connected with the puncture outfit anda trapezoidal joint through a three-way joint; a filter screen is arranged in a soft bag; four sides of the filter screen are hermetically welded with the inner wall of the right side of the soft bagto form an independent space in the soft bag; the tail end of the liquid adding pipe penetrates through the upper cover and the filter screen and is positioned between the filter screen and the rightside wall of the soft bag; a liquid inlet pipe I, a liquid inlet pipe II and a liquid outlet pipe are also arranged at the bottom of the soft bag; the liquid outlet pipe is connected with the lowest part of the soft bag; the upper ends of the liquid inlet pipe I and the liquid inlet pipe II respectively penetrate through the middle part of the soft bag and the lowest part of the filter screen andare positioned between the filter screen and the right side wall of the soft bag; the upper end of the first liquid inlet pipe is lower than the second liquid inlet pipe, and liquid outlet holes are evenly formed in the portions, between the lowest position of the filter screen and the upper cover, of the pipe walls of the upper ends of the first liquid inlet pipe and the second liquid inlet pipeat intervals in a staggered mode. The contact between blood in the bag and air can be effectively reduced, and meanwhile it can be guaranteed that the filtering effect is better.

The invention discloses a dressing umbilicus granule for treating postnatal neurosis intestinal obstruction and a preparation method thereof in order to solve the problem of treatment of postnatal neurosis intestinal obstruction. The preparation method comprises the following steps: (1) distilling mulberries, Chinese alyxia herb and bark or root of littleflower stringbush with water steam, extracting volatile oil for standby use and reserving dregs; (2) grinding amblystegium serpens and toasted rice-grain sprout into fine powder for standby use; (3) uniformly mixing aspongopus, sargassumthunbergii(Mert.)O.Kuntze, scandent schefflera stem and leaf, allium victorialis, radix ranunculi ternate, Chinese starjasmine stem and cassia twig with the dregs obtained in the step 1 uniformly, carrying out ethanol extraction twice, merging the two ethanol extracts, filtering the ethanol extracts, recovering ethanol and carrying out reduced pressure concentrating to obtain an extract; and (4) adding the fine powder obtained in the step 2 to the extract obtained in the step 3 and mixing the fine powder with the extract uniformly, drying the mixture at 60 DEG C, grinding the mixture into fine powder, adding polysorbate-80 to prepare a granule, drying the granule, shaping the granule, spraying the volatile oil obtained in the step 1, mixing the granule with the volatile oil uniformly and filling the mixture into a dressing umbilicus, thus obtaining the dressing umbilicus granule. Clinical experiments prove that the dressing umbilicus granule for treating postnatal neurosis intestinal obstruction has the characteristics of good curative effects and higher safety and is worthy of clinical application and popularization.

An aortic arch double-barreled main body stent graft and methods for its use, where the stent graft comprises, a main body stent graft having distal and proximal ends, the main body stent graft's length ranges from about 50-70 mm and the diameter at the proximal end ranges from about 40-60 mm, first and second lumens defined at the distal end of the main body stent graft, the first lumen's diameter ranges from about 18-30 mm, the second lumen's diameter ranges from about 18-30 mm, the first lumen is secured to the second lumen along a shared length, the shared length of the first and second lumens ranges from about 30-65 mm, and the main body stent graft defines a tubular wall that is contiguous with the first lumen and the second lumen such that any fluid entering the main body must exit through one of the first or second lumens.

The present disclosure is directed to an Inferior Vena Cava (IVC) filter apparatus and related methods. The IVC filter apparatus comprises a body having a proximal hook thereon. A plurality of filter legs extends away from the proximal hook. A distal hook is position interior to at least a portion of the plurality of legs.

The invention relates to the technical field of sheath canal structures, and discloses a sheath canal connected with a deep vein dialysis catheter. The sheath canal comprises a sheath canal body, a communicating pipe and a dialysis catheter, wherein the communicating pipe is arranged on the side face of the sheath canal body; external threads are arranged at the bottom of the sheath canal body and one end of the dialysis catheter; a nut is arranged on the external thread of the sheath canal body; and the sheath canal body and the dialysis catheter are connected together through the nut. The sheath canal body and the dialysis catheter are connected in a threaded mode, the sheath canal body and the dialysis catheter can be conveniently assembled and disassembled through the threaded connection mode, and the efficiency for dredging internal blockage condition of the dialysis catheter through a guide wire can be improved; and partition plates and rotating plates are arranged in the sheathing canal body, so that the guide wire can be guided and supported, and blood can be prevented from flowing out.

The invention discloses a cannabis sativa leaf extract as well as a preparation method and application thereof. The cannabis sativa leaf extract contains 0.30-0.93 g/g of cannabidiol and 0.05-0.08 mg/g of tetrahydrocannabinol. Wherein cannabidiol is a main medicinal component for inhibiting gingival bleeding and dental calculus; the content of tetrahydrocannabinol is far lower than the content standard of 0.3% (w/w), and the product is safe and free of addiction. The cannabis sativa leaf extract has the effects of inhibiting gingival bleeding and dental calculus, and particularly, after the cannabis sativa leaf extract and the ginkgo leaf extract form the oral care composition, the combination advantage is reflected, the dosage is reduced, and the curative effect is improved. The toothpaste prepared from the oral composition can better improve the healthy environment of teeth and gingiva, consolidate the gingiva structure and effectively treat gingival bleeding and dental calculus, is free of preservatives, is a pure natural, green, safe and effective toothpaste product, and has market popularization prospects.