36 results about "Percutaneous transluminal coronary angioplasty" patented technology

The present invention relates generally to catheters for performing medical procedures including percutaneous transluminal coronary angioplasty. More particularly, the present invention relates to guide catheters, diagnostic catheters and balloon catheters with an improved shaft design. In a preferred embodiment, the present invention includes a catheter shaft comprising an elongate support member having an outer surface, the elongate support member preferably defining a lubricious liner; a first layer disposed over the lubricious liner, a second layer disposed over the first layer, a third layer disposed over the second layer, a fourth layer disposed over the third layer, and a fifth layer disposed over the fourth layer. In preferred embodiments, the first and third layers comprise an ultraviolet-curable epoxy which is cured to desired degrees at select axial locations on the shaft to provide desired stiffness.

An exchange catheter facilitates the replacement of an existing guiding catheter with a larger guiding catheter during catheterization procedures such as percutaneous transluminal coronary angioplasty without disturbing the position of a guidewire. The exchange catheter has a distal portion through which a guidewire is slidable. The outer diameter of the distal portion is slightly less than the inner diameter of the existing guiding catheter. A femoral sheath is slidable over the proximal portion of the exchange catheter so as to facilitate femoral sheath exchange.

Methods of reducing mortality in myocardial infarction patients receiving a stent in connection with percutaneous transluminal coronary angioplasty include administering an anti-inflammatory compound to the patient. In one embodiment, the anti-inflammatory compound is an antibody to a complement component.

The present invention is directed to a procedure and a special balloon used in balloon angioplasty and stent installation in percutaneous transluminal coronary angioplasty (PTCA), which employs a heart catheter with a balloon at its distal end. After being inflated, the balloon is in doughnut shape with a hole in the center; its length is made to fit the length of the stent to be inflated. During an angioplasty procedure, the balloon is pushed forward into the stenosis and inflated with a device to dilate the blockage. The doughnut_shaped balloon provides a pass way for blood to flow through the coronary artery vessel, which does not cause angina akin to a heart attack resulted from traditional tube_shaped balloons used in the PTCA procedure that completely block blood flow after being fully inflated during balloon angioplasty and stent installation.

The invention relates to the field of biological preparations, in particular to a preparation method of stem cell exosomes and a novel application thereof. The method comprises the steps of extractionof mesenchymal stem cell exosomes, percutaneous transluminal coronary angioplasty, and stem cell exosome transplantation, and can be used for treating diabetic foot. The novel application of exosomescan accurately and effectively improve the microcirculation of diabetic foot, promotes angiogenesis, reconstructs capillary network, reduces occlusion of blood vessel restenosis, reduces amputation rate, and provides survival rate.

Through experiments, the invention proves applications of a cape jasmine and a cape jasmine extract product in the preparation of drugs for treating myocardial infarction, coronary heart disease, myocardial ischemia and cardiac arrhythmia, especially to an application in treatment of acute myocardial ischemia or myocardial ischemia of coronary heart disease caused by restenosis after percutaneous transluminal coronary angioplasty (PTCA). In addition, it is proved through experiments that the above various kinds of applications are accomplished by protection of cardiac muscle and cardiac muscle cell from damage or resistance against inflammatory lesion and oxidative damage of cardiac muscle cell. And an effective dose of cape jasmine and the cape jasmine extract product in a unit preparation is obtained by detection.

The invention discloses a percutaneous transluminal coronary angioplasty (PTCA) balloon catheter, which comprises a push rod, a balloon, an internal tube, a developing mark, a stress diffusion tube and a connecting device, wherein a plurality of bumps are arranged on the outside surface of the balloon. The outside surface of the balloon of the PTCA balloon catheter provided by the embodiment of the invention has a plurality of bumps, so that the bumps can tightly adhered onto the blood vessel walls of blood vessels at lesions in an interventional treatment operation to provide enough friction to prevent the balloon from sliding and displacing in or after expansion; and thus, the operation is safe and stable.

The invention discloses a cyclodextrin functionalized derivative carrier system based on polyamide-amine and its application. The carrier system is made of cyclodextrin functionalized with polyamide-amine. The chemical The structure is as follows: Among them, cyclodextrin is β-cyclodextrin or its derivatives, γ-cyclodextrin or its derivatives, PAMAM is the core of ethylenediamine, and the end is aminated polyamide-amine (G0-G4), m =2-6; the carrier system has the function of simultaneously loading tanshinone IIA drugs, and can jointly load drugs and genes; the carrier system can be applied to in vitro gene cell transfection and treatment of arterial restenosis; the present invention is aimed at According to the characteristics of endothelial injury, a new type of carrier system is proposed, which can simultaneously load tanshinone drugs and genes, which can effectively repair the damaged endothelium, inhibit the proliferation of tissue cells, and achieve the effect of synergistic treatment. It has a good application prospect in prevention and treatment.

The invention discloses an arsenic trioxide controllable-releasing drug balloon. The quick water soluble performance of arsenic trioxide is used. The arsenic trioxide and a slow-releasing layer are coated on the surface of the balloon. Even minitype concave holes which restrain releasing of the arsenic trioxide are formed on the slow-releasing layer. The size of the concave holes is adjusted, so that the concave holes are expanded to form micro holes in the process of expanding of the balloon, the facts that the arsenic trioxide is quickly released on a vascular wall and is evenly gathered on the surface of the vascular wall are achieved, quick phagocytosis of a cell is used, proliferation of the cell is avoided, and accordingly the effect that restenosis is avoided is achieved, the balloon can be used for expansion of a percutaneous transluminal coronary angioplasty (PTCA) operation and combination with the PTCA operation and bare stents, and the influence on restenosis caused by drug stent lay-coated materials is lowered.

The present invention relates to a hemostasis valve device which allows a wire or a catheter to be inserted into the left or right coronary artery via the femoral artery or an arm artery when a Cardiac Catheterization or Percutaneous Transluminal Coronary Angioplasty operation is performed, wherein two independent sealing members are opened and closed by press and release actions of push buttons coupled to a body and the rotation of a fastening tube, respectively, so that the leakage or blood or the inflow of outside air is simply and effectively blocked during the operation, and a drug influx tube for allowing a medicine such as a thrombolytic drug to flow into a patient during the operation pivots and is adjusted in a stepwise manner within a certain range of angles according to body conditions or movements of the patient.

The invention discloses the application of egonol-type benzofuran and glycosides thereof in the preparation of an ACAT (Acyl-CoA:Cholesterol Acyltransferase) inhibitor, provides the application of egonol-type benzofuran as shown in general formula I and glycosides thereof in the preparation of the ACAT inhibitor, and further provides the drug combination of the ACAT inhibitor, which contains egonol-type benzofuran and glycosides thereof with the active component being shown in the general formula I. The egonol-type benzofuran and the glycosides thereof can be prepared into various forms of drug, such as tablets, capsules and the like, because of the significant effect of the ACAT inhibitor thereof. The invention is suitable for preventing and treating diseases, such as angina, myocardial infarction, cerebral infarction, Alzheimer's disease, acute coronary syndromes (ACS), percutaneous transluminal coronary angioplasty (PTCA) or post-stenting coronary restenosis; and the invention, as a therapeutic agent for regulating the sebaceous gland function and inhibiting the excessive production of sebum, is also suitable for curing diseases, such as oily skin, acne, seborrhea, acne-like lesion caused by corticosteroid and the like.

The invention discloses an establishment method of a diarrhea-type irritable bowel syndrome compound animal model. The establishment method specifically comprises the steps of repurchasing Sprague-Dawley pregnant rats for predelivery, and recording the delivery date. The method comprises the procedures of 1, colorectum stimulation in the neonatal stage, wherein colorectum stimulation is separatelyconducted in the 8 th day, the 10 th day and the 12 th day after the birth of modeling groups of young rats, a percutaneous transluminal coronary angioplasty balloon is inserted in the colorectum viathe anus, after the balloon completely enters the colorectum, gas is injected into the balloon, so that the pressure in the balloon is 60 mmHg and is kept for 1 minute, stimulation is conducted onceevery day and conducted three times in total, after stimulation, the young rats and mother rats are fed together to the 22 nd day and then weaned, cage allocation is conducted on the 30 th day, then normal feeding is conducted, 60 days after the birth, abdominal wall withdrawal reflex examination is conduced, intestinal-tract high-sensitivity rats are screened out, and the next step of modelling is conducted; 2, gavage with folium sennae juice, wherein folium sennae is put into boiled water which is 5 times the volume of the folium sennae to be soaked for one night, after filtering, a filtrateis taken, and then concentrated until the concentration is 0.45 g/mL, the 0.45 g/mL folium sennae juice is fed for gavage of the screened-out 60-day intestinal tract high-sensitivity rats, 2 mL of the juice is fed to each rat once every day, gavage is continuously conducted for 2 weeks, and then the IBS-D rat model is established.

In an interventional radiography (IVR), for example in a percutaneous transluminal coronary angioplasty (PTCA), when the IVR includes a period in which the movement of the object is slow, a normal X-ray radiating mode (a continuous X-ray radiation or a normal rate pulse radiation of about 15-30 pulses per second) is changed to a very slow rate pulse X-ray radiation of about 1-5 pulses per second to decrease the X-ray dose of the patient. Since the movement is slow, the very slow rate pulse radiation can still trace the movement adequately. Further, the quality of the X-ray image is improved by increasing the tube current in the very slow rate pulse radiation because less heat is generated in the X-ray tube.

The present invention discloses a method for retaining percutaneous transluminal coronary angioplasty (PTCA) guide wire left ventricular pacing. In the guide wire implantation process of a PTCA guide wire in a left ventricular, the PTCA guide wire is retained in an electrode and extends out of the far end of the electrode, as the extension of a pacing electrode, the effects of stabilizing the electrode and searching a more suitable pacing position can be achieved, for example a best pacing position vessel is thin. The method can be applied to the condition that a repeated acute dislocation and a large pacing threshold test fluctuation appear in the operation after a left ventricular guide wire is implanted and no other suitable target vein or other suitable guide wire can be selected, and the treatment effect is good without complications.