199 results about "Vascular surgery" patented technology

The vasoocclusive device for use in interventional therapy and vascular surgery adapted to be inserted into a portion of a vasculature, includes a vasoocclusive coil disposed about an inner reinforcement coil wherein said vasoocclusive coil is helically wound and the inner reinforcement coil forms a reverse helical winding opposite the vasoocclusive coil winding, thereby forming a biplex wound coil. The vasoocclusive device biplex winding provides improved mechanical properties to the device. An inner reinforcement stretch resistant member attached within the biplex windings limits coil stretchability.

The three-dimensional device is adapted to be inserted into a portion of a vasculature for occluding the portion of the vasculature for use in interventional therapy and vascular surgery. The device is formed from a multi-stranded micro-cable having a plurality of flexible strands of a shape memory material and at least one radiopaque strand. The flexible strands in a multi-stranded micro-cable of the device can be helically wound, or can be configured as parallel, longitudinal strands, and can also be formed to have a secondary, three-dimensional therapeutic configuration, such as helical, conical, spherical, or other geometric shapes. The strands can be made of a shape memory nickel titanium alloy, that is highly flexible at a temperature appropriate for introduction into the body via a catheter, and that after placement will take on the therapeutic shape. The device can also include a therapeutic agent, and can be bundled by an outer cover to constrain the strands of the micro-cable about a longitudinal axis to produce a composite banded cable. The radiopaque strand can have a core strand with a plurality of intermittently spaced apart enlarged radiopaque portions that may be a plurality of beads of radiopaque material spaced apart and mounted on the core strand, or a plurality of coils intermittently wound about and spaced apart on the core strand. A polyhedral occlusive device is also provided, adapted to be inserted into a portion of a vasculature for occluding a portion of the vasculature, for use in interventional therapy and vascular surgery. One or more therapeutic fibers can also be woven into the coil to enhance treatment of the side after placement of the device.

The vasoocclusive apparatus can be used in a method of interventional therapy and vascular surgery by inserting the apparatus into a portion of a vasculature, for treatment of a body vessel such as an aneurysm in conjunction with a secondary vasoocclusive device to be placed within the vessel. The vasoocclusiveVasooclusive apparatus includes a plurality of strut members connected together at a central hub that extend from a collapsed position to an expanded configuration to cross the neck of the aneurysm, dividing the neck into smaller openings, allowing the deployment of the secondary vasoocclusive device within the aneurysm but preventing migration of the secondary vasoocclusive device from the aneurysm. The strut members can be made from a twisted cable of strands of a superelastic material, such as a shape memory nickel titanium alloy, with at least one radiopaque strand. A shape memory collar is provided for detachably mounting the vasoocclusive apparatus to a pusher member and for detaching the vasoocclusive apparatus for deployment when a desired placement within an aneurysm to be treated and out of a parent vessel is achieved.

The invention relates to medicine, namely to cardiology, cardiovascular surgery, functional diagnosis and clinical electrophysiology of the heart. The invention consists in reconstructing electrograms, whose experimental registration requires an invasive access, by computational way on unipolar ECGs recorded at 80 and more points of the chest surface. Based on reconstructed electrograms, isopotential, isochronous maps on realistic models of the heart are constructed, the dynamics of the myocardium excitation is reconstructed and electrophysiological processes in the cardiac muscle are diagnosed. Application of the method allows one to improve the accuracy of non-invasive diagnosis of cardiac rhythm disturbances and other cardio-vascular diseases.

Natural and / or synthetic materials to form a strong barrier between the skeletal system and the great vessels. In the preferred embodiments, a natural or synthetic material is used to prevent scar tissue from forming around the vessels and / or to act as barrier placed between the vessels and the skeletal system, including the spine. Devices according to the invention may also be used over the dura and nerves following laminectomy procedures, between the sternum and the pericardium or heart following cardiac procedures, in intra-abdominal procedures such as intestinal or vascular surgery, over the brain in intra-cranial surgery, over the ovaries or other organs or tissues in the female genitourinary system, over the prostate or other organ or tissues in the male genitourinary system, or in other surgeries on humans or animals.

The invention relates to a blood vessel computer aided iconography evaluating system. The system comprises the following contents: (A) transmission of CTA (Computed Tomography Angiography) from a CT (Computed Tomography) working station to a PC (Personal Computer), wherein a transmission way comprises network card connection, CD burning and CT film scanning; (B) CTA three-dimensional reconstruction, wherein a three-dimensional reconstruction method comprises shaded surface display (SSD), maximum intensity projection (MIP) and multiplane reformation (MPR), obtains various real and clear three-dimensional models and images and can be used for observing a blood vessel three-dimensional space structure anytime and anywhere and lay the foundation for the three-dimensional measurement of various blood vessel geometric parameters; (C) blood vessel structure three-dimensional measurement; and (D) aneurysm endovascular graft exclusion virtual graft. The invention provides the computer aided iconography evaluating system which is suitable for people to use at random and is more accurate. In addition, the invention plays a role in blood vessel surgical scientific research, teaching, surgery training, and the like. The system realized by the invention is stable and reliable and is suitable for being popularized and used in blood vessel surgery centers of various large, medium and small hospitals.

The invention provides in one embodiment a method for treating vascular trauma. The method can include administering to an individual undergoing vascular trauma an effective amount of a retinoic acid receptor (RAR) antagonist or an RAR inhibitor. The methods can be used to lower serum triglycerides in a patient undergoing an invasive vascular procedure such as vascular surgery.

An improved stabilizing tool functions in complement with conventional vascular surgical, interventional, cardiological and urological medical radiological, devices among others. Provided is a combinational set of tubular housing elements having alternate fail-safe securement mechanisms which prevents contamination while being operable, generally by a skilled surgeon with one of his two hands, leaving the other free to perform required surgical tasks.

Exemplary embodiments of apparatuses and methods of providing an endovascular′dock within a blood vessel are provided. An apparatus for vascular surgery can be provided, having an external tubular graft capable of expansion and configured to be placed within a sheath in an unexpended state, a first tubular structure provided internally within the external tubular graft and configured for placement of a graft therein, and a second tubular structure provided internally within the external tubular graft and configured for placement of a graft therein. Stent grafts can be provided along each tubular structure to a corresponding blood vessel such that blood flow is provided to the blood vessel from the apparatus within the stent grafts to each blood vessel, blocking the blood flow directly from the aneurysm.

The present invention relates to methods for treating restenosis using mesenchymal stem cells, and in particular to treating restenosis following vascular surgery (e.g., angioplasty, stent implantation, rotoblation, atheroectomy, thrombectomy, or grafting).

The present invention relates to compounds and compositions useful for inhibiting and / or reducing platelet deposition, adhesion and / or aggregation. The present invention also relates to methods for screening compounds and compositions useful for inhibiting or reducing platelet deposition, adhesion and / or aggregation. The present invention further relates to methods for the treatment or prophylaxis of thrombotic disorders, including stroke, myocardial infarction, unstable angina, peripheral vascular disease, abrupt closure following angioplasty or stent placement and thrombosis as a result of vascular surgery.

A cardiovascular thoracic surgery nursing apparatus comprises a nursing apparatus body and is characterized in that a compression resistant damping cushion is arranged on the lower side of the nursing apparatus body, a fixation support base is arranged on the lower side of the compression resistant damping cushion, hydraulic telescopic units are arranged on the lower side of the fixation support base, universal wheel supporting frames are arranged on the lower sides of the hydraulic telescopic units, universal wheel discs are arranged on the lower sides of the universal wheel supporting frames, universal wheel fixation units are arranged on the lower sides of the universal wheel discs, fixation rotation shafts and universal braking units are arranged on the universal wheel fixation units, and universal wheels are arranged on the fixation rotation shafts. The nursing apparatus has the advantages that patients can be nursed effectively according to nursing plans formulated by medical personnel, patient pains are reduced, the rehabilitation efficacy is improved, and medical personnel work loads are reduced.

The invention relates to medicine, namely to cardiology, cardiovascular surgery, functional diagnosis and clinical electrophysiology of the heart. The invention consists in reconstructing electrograms, whose experimental registration requires an invasive access, by computational way on unipolar ECGs recorded at 80 and more points of the chest surface. An application of the method allows one to improve the accuracy of non-invasive diagnosis of cardiac rhythm disturbances and other cardio-vascular diseases.

The present invention provides methods, compositions, formulations, and kits related to acadesine, or a prodrug, analog, or salt thereof, and / or a blood clotting inhibitor for preventing or reducing adverse side effects in a patient. The type of patient that may benefit includes a patient with decreased left ventricular function, a patient with a prior myocardial infarction, a patient undergoing non-vascular surgery, or a fetus during labor and delivery.

The present invention provides an implantable modular AV shunt device, which is capable of monitoring and reporting its own patency, and which comprises a plurality of modular components that may be assembled and adjusted by the vascular surgeon during the implantation procedure, using well-known surgical techniques, in order to provide a custom fit and arrangement for the particular patient involved. The device comprises an arterial anastomotic valve that permits blood flowing through an artery to pass into the shunt device, a venous anastomotic valve that permits blood flowing through the shunt device to pass into a vein, a medial flow control unit, a first flexible shunt that carries blood from the arterial anastomotic valve to the medial flow control unit, a second flexible shunt that carries blood from the medial flow control unit to the venous anastomotic valve, and a valve control system. The valve control system is operable to control both the rate at which blood is permitted to enter the shunt device via the arterial anastomotic valve, as well as the rate at which blood is permitted to exit the shunt device via the venous anastomotic valve.

The invention discloses an imaging method of a three-dimensional blood vessel ultrasonic image and navigation equipment in an ultrasonic operation. The method comprises the following steps: a plurality of movement tracks at a target scanning part on a limb are determined; a mechanical arm drives a probe to move in sequence according to each movement track to obtain first ultrasonic data; and a plurality of ultrasonic images are generated according to the first ultrasonic data, and the generated ultrasonic images are subjected to image composite reconstruction to obtain a three-dimensional ultrasonic image of the target scanning part. According to the method, the mechanical arm controls the probe to move, three-dimensional image reconstruction is carried out on images collected by the probe, large-range ultrasonic image scanning and three-dimensional image reconstruction on the surface of a human body are achieved, and therefore, a complete three-dimensional ultrasonic image of large-range blood vessels in the human body is obtained, image matching and fusion can be carried out on the three-dimensional ultrasonic image and a three-dimensional DSA (or MRA and the like) image, a three-dimensional fusion image for guiding surgical operation is formed, and the vascular surgery is navigated through the three-dimensional fusion image, and the safety of the vascular surgery is improved.

An occlusion device for vascular surgery, suitable for clogging treatments of vascular entry sites and for endovascular interventions such as embolizations of blood vessels, treatment of arteriovenous malformations or small aneurysms, arterial dissections and the like, by releasing in an operation region a quick setting surgical glue or haemostatic fluid, through an outlet mouth of a duct. The device prevents the surgical glue from contacting within the duct a patient's biological fluids, in particular blood, which would close the duct. In the case of clogging treatments of vascular entry sites, a backflow preventing device may be provided, preferably provided by a coupling device between the duct and an introducer sheath by which an outlet mouth is kept in contact to keep in a one-way fluid tight contact against the outer surface of the introducer sheath until an injection pressure P2 is applied to cause release of the surgical glue.

The invention relates to the technical field of simulation control and graphic processing, and provides a virtual minimally invasive abdominal aorta vascular surgery collision detection method comprising the following steps of 1, abdominal aorta vascular three-dimensional modeling; 2, abdominal aorta vascular deformation model construction; 3, rough collision detection; and 4, precise collision detection. The problems of a classic bounding box method that intersection testing is complex and efficiency is low can be solved by utilizing rapid collision detection of an external layer AABB bounding box so that real-time performance of the system can be enhanced. Precise collision detection is performed by utilizing the characteristic of tightness of an internal layer K-DOPs bounding box so that high accuracy of the detection result is guaranteed.

The invention provides a thread suspending device for a cardiovascular surgery, relates to an instrument and an appliance which are used when threads are sequentially arranged and suspended in a surgical operation and are particularly suitable for cardiovascular surgical operations and belongs to the technical field of medical apparatuses and instruments. The thread suspending device has a circular metal structure and consists of spring sections, metal wires connected with the spring sections and a fixing ring, wherein each spring section is a section of extension spring, and spring rings on the extension spring can be used for clamping surgical threads; the threads are straightened and are pressed between the spring rings on the spring sections when suspended; and the fixing ring is used for fixing the thread suspending device. The spring sections are arranged sequentially on the circumference, the threads can be suspended in the circumferential sequence, and the sequence of the threads can be ensured. The metal wires at both ends of each spring section are slightly pressed when the threads are taken, the spring rings on the spring sections are separated, and the threads can be easily taken out. Thus, the threads can be suspended sequentially and can be tightened, the device can be quickly and reliably operated, and the operation time is greatly saved.

The invention discloses a novel vascular surgery department artery-vein surgical hemostasis device which comprises a first pressing plate. The left end of the first pressing plate is fixedly connected with one end of a second elastic cord, the right end of the first pressing plate is fixedly connected with one end of a first elastic cord, a second pressure gauge, a battery and a first pressure gauge are sequentially arranged on the upper surface of the first pressing plate from left to right, a switch is arranged on one side of the second pressure gauge, second pressing plates are arranged on the front and back sides of the lower surface of the first pressing plate, and the second pressing plates are in sliding connection with the first pressing plate; according to the novel vascular surgery department artery-vein surgical hemostasis device, hemostasis of a wound by compression is achieved through the first pressing plate and a hemostatic medicine bag, the pressure for compressing the wound is convenient to control, adjustment is convenient, artery-vein vessels on the two sides of the wound are made closer through the second pressing plates, wound healing is convenient, rapid hemostasis can be achieved, and the device is simple in structure and convenient to use, capable of being recycled after being disinfected by replacing the hemostatic medicine bag and low in cost.

The invention relates to medicine, namely to cardiology, cardiovascular surgery, functional diagnosis and clinical electrophysiology of the heart. The invention consists in reconstructing electrograms, whose experimental registration requires an invasive access, by computational way on unipolar ECGs recorded at 80 and more points of the chest surface. Based on reconstructed electrograms, isopotential, isochronous maps on realistic models of the heart are constructed, the dynamics of the myocardium excitation is reconstructed and electrophysiological processes in the cardiac muscle are diagnosed. Application of the method allows one to improve the accuracy of non-invasive diagnosis of cardiac rhythm disturbances and other cardio-vascular diseases.

The invention discloses a postoperative auxiliary rehabilitation device for vascular surgery. The postoperative auxiliary rehabilitation device comprises a hollow base, wherein a lower limb exercisingdevice is arranged at one side of the hollow base; a back exercising device is arranged at the upper part of the hollow base; a buttock supporting device is arranged at the upper part of the hollow base and is located between the lower limb exercising device and the back exercising device. The postoperative auxiliary rehabilitation device disclosed by the invention is good for promoting the bloodcirculation of a whole body of a patient and the rehabilitation of the patient is promoted; meanwhile, kinetic energy generated in an exercising process of the patient also can be converted into electric energy and the electric energy is stored in a storage battery, so that the rehabilitation device has a power generation function and the exercising interests of the patient can be stimulated; theenthusiasm of initiative exercising of the patient is easy to improve so that the rehabilitation time is shortened; a rotary unit has a massaging effect on the back of the patient and fatigues of thepatient is easy to expel; an ergonomic design is met and the comfort can be greatly improved when the patient does rehabilitation exercise by utilizing the device.

The present invention rerlates to medical techniques, in particular, to methods and apparatus applied in minimally invasive vascular surgery to eliminate occlusion of blood vessel, using grafts and to prevent rupture of abdominal aorta using grafts or stent-grafts. More particularly, the present invention relates to methods and apparatus for locating and securing intravascular devices, substantially grafts, through a duct specially created by the surgeon to approach the blood vessel lumen. There is suggested a new and improved method for fixating an intravascular device to a blood vessel wall in combination with a new and improved stapler design based on this method. The stapler comprises a hollow body at the proximal end whereof there are mounted a guiding head and a die, and at the distal end, at a certain angle to the latter, a holding handle and a control lever, pivotally connected to this handle, and this control lever is operatively connected, via a movable pressure member, to a tip located inside the body, head and die. In the die there are disposed fastener means. The movement of control lever is converted into radial forces necessary for punching the wall of an intravascular device and surrounding blood vessel wall, location and fixation of fastener means, with simaltaneous bending of their ends. For maximum sinking of heads of fastening elements in the wall of an intravascular device, additional pushing members are movably mounted in radial slots of the die. The intravascular device, substantially graft, is fixated to a blood vessel wall, substantially aorta, via a set of at lest two staplers, and in each of the staplers there are disposed simultaneously several fastener means.

The invention relates to a long-wave high-power semiconductor laser comprehensive therapeutic instrument comprising a power supply, a core circuit control system, a semiconductor laser module, a heat radiation cooling device, peripheral equipment and a medical fiber, wherein the power supply is connected with the core circuit control system; the semiconductor laser module, the heat radiation cooling device and the peripheral equipment are respectively connected with the core circuit control system; the output of the semiconductor laser module is connected with the medical fiber; the semiconductor laser module outputs laser beams with wave lengths ranging from 1.4 micrometers to 2.0 micrometers, and lasers with the wave lengths can be intensively absorbed by water and have good biological tissue gasification incision functions, higher oxyhemoglobin absorbing capability and good tissue coagulation hemostasis capability. The invention can accurately and efficiently carry out an excision surgery on soft tissues of a human body and can be applied to the therapy of diseases in the fields of vascular surgery, urology department, lung disease department, general surgery, and the like and has the advantages of small size, light weight, easy operation, and the like.

An apparatus and a method for connecting medical tubing or any other type of fluidic circuit conduits (e.g., cannulae) to a ventricular assist device (“VAD”) or any other pumping device used for blood pumping during cardiac circulatory support for vascular surgery. The apparatus and the method prevent air bubbles from entering a cardiac circulatory support system when connecting cannulae to a VAD that may later enter the blood stream of a patient during cardiac surgery, and also provide for purging any air bubbles that may have entered the cardiac circulatory support system during a cannulae-VAD connection.

The invention discloses a nursing device for vascular surgery. The nursing device comprises a bed frame, and a baffle is fixedly arranged at the left end of the upper surface of the bed frame; a bed board is fixedly installed on the upper surface of the bed frame, and telescopic supporting legs are arranged on the lower surface of the bed frame; the left sides of the front and rear side faces of the bed frame are both provided with an anti-falling mechanism, the right sides of the front and rear side faces of the bed frame are both provided with a leg placing part, and sliding grooves are formed in the right sides of the front and rear side faces of the bed frame respectively. The height of the bed frame can be adjusted so that the device can better adapt to different patients for use, andthe legs of each patient can be lifted. Besides, medical staff conveniently adjust the horizontal positions and heights of the leg placing parts according to lower limb conditions of the patients, lower limb varicosities and lower limb phlebothrombosis can be effectively prevented, the accident that the patients fall off a bed when turning over can be avoided, and the nursing device especially has a good protection function on elderly patients also suffering from other diseases such as diabetes.

The present invention relates to compounds and compositions useful for inhibiting and / or reducing platelet deposition, adhesion and / or aggregation. The present invention also relates to methods for screening compounds and compositions useful for inhibiting or reducing platelet deposition, adhesion and / or aggregation. The present invention further relates to methods for the treatment or prophylaxis of thrombotic disorders, including stroke, myocardial infarction, unstable angina, peripheral vascular disease, abrupt closure following angioplasty or stent placement and thrombosis as a result of vascular surgery.