46 results about "Saphenous veins" patented technology

A catheter deliverable stent/graft especially designed to be used in a minimally invasive surgical procedure for treating a variety of vascular conditions such as aneurysms, stenotic lesions and saphenous vein grafts, comprises an innermost tubular structure and at least one further tubular member in coaxial arrangement. In one embodiment, the innermost tubular structure is of a length (L₁) and is formed by braiding a relatively few strands of highly elastic metallic alloy. The pick and pitch of the braid are such as to provide relative large fenestrations in the tubular wall that permit blood flow through the wall and provide the primary radial support structure. A portion of the innermost tubular structure of a length L₁ is surrounded by a further braided tubular structure having relatively many strands that substantially inhibit blood flow through the fenestrations of the innermost tubular structure. The composite structure can be stretched to reduce the outer diameter of the stent/graft, allowing it to be drawn into a lumen of a delivery catheter. The catheter can then be advanced through the vascular system to the site of treatment and then released, allowing it to self-expand against the vessel wall. Various optional embodiments are disclosed that allow one skilled in the art to tailor the design to the specific application.

The present invention provides systems, apparatus and methods for selectively applying electrical energy to body tissue in order to incise, dissect, harvest or transect tissues or an organ of a patient. The electrosurgical systems and methods are useful, inter alia, for accessing, dissecting, and transecting a graft blood vessel, such as the internal mammary arteries (IMA) or the saphenous vein, for use in a by-pass procedure. A method of the present invention comprises positioning an electrosurgical probe adjacent the target tissue so that one or more active electrode(s) are brought into at least partial contact or close proximity with a target site in the presence of an electrically conductive fluid. A high frequency voltage is then applied between the active electrode and one or more return electrode(s). During application of the high frequency voltage, the electrosurgical probe may be translated, reciprocated, or otherwise manipulated such that the active electrode is moved with respect to the tissue. The present invention volumetrically removes the tissue at the point of incision, dissection, or transection in a cool ablation process that minimizes thermal damage to surrounding, non-target tissue.

Aspiration catheters suitable for use in the treatment of an occlusion in a blood vessel are disclosed. These catheters are especially useful in the removal of occlusions from saphenous vein grafts, the coronary and carotid arteries, arteries above the aortic arch and even smaller vessels. The catheters of the present invention are provided in either over-the-wire or in single operator form. Radiopaque markers are preferably incorporated into distal ends of the catheters to facilitate their positioning within the body. The catheters are provided with varying flexibility along the length of the shaft, such that they are soft and flexible enough to be navigated through the vasculature of a patient without causing damage, but are stiff enough to sustain the axial push required to position the catheter properly and to sustain the aspiration pressures.

A method for the treatment of a stenosis or an occlusion in a blood vessel in which an occlusive device is first delivered and activated at a site distal to the occlusion to at least partially occlude the vessel. A therapy catheter is then introduced to treat the occlusion and a debris removal device is delivered to aspirate debris from the vessel. The present invention eliminates the need for a separate irrigation catheter and irrigation fluid which allows the procedure to be performed quickly and efficiently, and is especially useful in the removal of occlusion from saphenous vein grafts, the coronary and carotid arteries, arteries above the aortic arch and vessels of similar size and pressure.

Described are devices, methods, and systems for achieving occlusion of vascular vessels. Further described are certain reduced or low profile procedures and devices for the percutaneous occlusion of the saphenous vein, such as in the treatment of a varicose vein condition caused by venous reflux.

A vessel harvesting system that is suitable for harvesting target vessels such as the saphenous vein or radial artery for cardiac artery bypass graft surgery. The system includes a vessel harvesting tool with an elongated cannula and a plurality of surgical instruments therein for separating the target vessels from the surrounding tissue and side branches. The harvesting tool includes a modular handle unit with a base attached to the elongated cannula and a sled that can adapt the base to various types of vessel severing/securing tools, such as tissue welders, bipolar scissors, and bipolar bisectors. The handle unit may be relatively rigid and integrated with the various tool movement controls to facilitate one-handed operation by a user. A severing/securing tool rotation mechanism may be incorporated within the handle and operated by a thumbwheel or other such mechanism. The vessel harvesting system may also provide distal CO₂ insufflation for enhanced maintenance of the operating cavity.

A tubular graft device is provided comprising a tubular member and a fiber matrix of one or more polymers about a circumference of the tubular member. The matrix may be electrospun onto the tubular tissue. In one embodiment, the tubular tissue is from a vein, such as a harvested saphenous vein, useful as an arterial graft, for example and without limitation, in a coronary artery bypass procedure. Also provided is method of preparing a tubular graft and connecting the graft between a first body space and a second body space, such as the aorta and a location on an occluded coronary artery, distal to the occlusion.

The present invention is a method and device for harvesting a vessel. The vessel harvester comprises an internal stenting catheter with proximal and distal ends, a sheath catheter with proximal and distal ends, and a cylindrical cutting tube that is attachable to the distal end of the sheath catheter. The vessel harvester is used to harvest vesseal such as the greater and lesser saphenous veins, the basilic vein, the cephalic vein, and the radial artery.

The present invention, which addresses the needs described above, resides in an apparatus and method for coupling vascular apertures to a blood supply vessel in a manner that minimizes the time and operator dependent inconsistency in performing vascular anastomoses. In the coronary setting, this concept is fast and can be applied to both conventional and minimally invasive operative techniques. In the preferred embodiment, the present invention relates to an apparatus and method for facilitating end-to-side vascular anastomoses procedure, whereby the present invention acts as a coupling apparatus between a first, blood supplying hollow organ, e.g. the LIMA, radial artery, or a saphenous vein and the side wall of second hollow organ, typically one of the major coronary arteries, such as the left coronary artery (LCA), right coronary artery (RCA) or the circumflex (CX).

A system and a method for harvesting a section of a blood vessel from a patient's body for further use. The system includes an expandable hood that creates a workspace for the dissection and removal of the vessel and a telescoping device that has tools at its distal end. The blood vessel is cut at a distal location and a light catheter inserted to illuminate the area of dissection. The system can remove a section of the saphenous vein for use in coronary bypass surgery.

A graft device is provided comprising a flow conduit and a surrounding covering. The graft device is for connecting between a first body space and a second body space. In one embodiment, the flow conduit is a vein, such as a harvested saphenous vein, useful as an arterial graft, for example and without limitation, in a coronary artery bypass procedure. Also provided are methods of preparing a graft device and connecting the graft between a first body space and a second body space, such as the aorta and a location on an occluded coronary artery, distal to the occlusion.

A device and method for maintaining pressure onto a blood vessel is disclosed, and include a tissue-confining device having two parallel longitudinally extending bars which extend between a proximal end and a distal end and at least one strap attachable to tissue in the vicinity of the blood vessel and affixable to an element connected to the tissue-confining device, for retaining the tissue-confining device in compressing contact with tissue in the vicinity of the blood vessel. The device is suitable for inducing hemostasis and for maintaining post-hemostasis pressure, large saphenous vein closure, post-pseudoaneurysm closure, and conglutination of fragmented portions of a burst artery.

A venous closure catheter is disclosed for performing sclerotherapy which includes an elongated catheter body having opposed proximal and distal end portions, a fluid delivery lumen and a guidewire lumen. A plurality of discharge apertures are associated with the distal end portion of the catheter body and communicate with the fluid delivery lumen for delivering a sclerosing solution into the saphenous vein. A circumferential flange is positioned on an exterior surface of the catheter body proximal to the discharge apertures, which has a plurality of projections formed thereon for traumatizing the inner wall of the saphenous vein upon removal of the catheter body therefrom to promote closure of saphenous vein after sclerotherapy. A compression apparatus is disclosed for providing therapeutic pressure subsequent to sclerotherapy. The compression apparatus includes first and second wraps for providing compression of an upper leg, and the lower leg and foot, respectively.

Varicosity refers to vein circuity and expansion caused by hypostasis vein wall weakness and the like. Veins at multiple parts of a body can have varicosity, varicosity mostly happens at lower limbs, and the disease can be also caused by femoral-saphenous vein valve function insufficiency. Varicosity self is secondary representation of other lesions such as vena cava blocking, and the protopathy shall be treated actively. The medicine is prepared from medicines including Chinese mosla herb, epimedium herb, ginger, dalbergia odorifera, vitex negundo, herba lycopi, cassia twigs, artemisia anomala, schizonepeta, hematoxylon, divaricate saposhniovia roots, rhizoma sparganii, notopterygium incisum, lindera aggregate, ligusticum, cortex lycii, salvia chinensis, cicada slough, ash bark, fermented soybeans, sculellaria barbata, bupleurum chinense, portulaca oleracea, duckweed, rhizoma smilacis glabrae, horsetail, felwort, radices trichosanthis, radix scrophulariae, bamboo leaves, cape jasmine and prunella vulgaris. Due to the effects of the combined medicines, a synergistic effect can be achieved, and thus varicosity can be effectively treated.

Improved endoprosthesis (100) for a total vascular exclusion of the liver (120), to be used in most critical surgical operations like in example in major hepatectomy and in hepatic trauma with relevant venous damage, characterized in that comprising: an endovenous catheter (101), having the shape of a cylinder extended longitudinally, and being flexible in the transversal direction in order to beinserted preferably from the femoral vein or saphena vein (114), directed to the inferior caval vein (102); said endovenous catheter (101) having a diameter in the order of the inner diameter of the same femoral vein or saphena vein (114); a self-expanding sheet (103), rolled around itself and fixed at the distal part (133) of said endovenous catheter (101), characterized in that: said sheet (103)is achieved by using a shape memory alloy, having two states: a first state having a shape rolled around itself (131a), called martensite, associated to a first temperature T1, and a second state having an expanded shape (131 b), called austenite, associated to a second temperature T2, - said endoprosthesis (100) comprises means of heat generation and/or transmission, between said endovenous catheter (101) and said self-expanding sheet (103), and means of respective warming up or cooling down of said sheet (103); at said second temperature T2, the self-expanding sheet (103) changes its shapeand achieves automatically the expanded shape (131 b), adapting itself perfectly to the surface of the caval vein, maintaining therefore the function of blood flowing back to the heart; at said firsttemperature T1, the self-expanding sheet (103) changes its shape and achieves automatically the shape rolled around itself (131a), facilitating its reinsertion into the distal part (133) of said endovenous catheter (101), so that, under control of an operator, the endovenous catheter (101) is firstly installed by insertion from the femoral vein or saphena vein (114) directed to the caval vein, with the self-expanding sheet (103) placed in the caval tract of the upper hepatic veins; then, said mechanism of radial expansion of said self-expanding sheet (103) is activated so that the lateral walls bond and close the holes connecting the upper hepatic veins (113) to the inferior caval vein (102); therefore, the device permits the blood to flow inside the same self-expanding sheet (103) preventing at the same time a return of blood to the liver (120); in such a way, with a simultaneous Pringle maneuver that stops the blood going to the liver (120), a total vascular exclusion of the liver (120) is achieved.

The invention relates to the technical field of intimal hyperplasia, in particular to a preparation method and application of a hyaluronic acid-heparin adhered acellular great saphenous vein patch. The preparation method of the hyaluronic acid-heparin adhered great saphenous vein patch comprises the following steps of (1) taking out great saphenous veins in vivo, putting the great saphenous veinsin heparin saline at 4 DEG C, and carrying out decellularization treatment by adopting 1% SDS; adopting hyaluronic acid surface adhesion for the decellularized great saphenous vein, and the adopting the heparin surface adhesion to prepare a hyaluronic acid-heparin adhered decellularized great saphenous vein patch; and (2) implanting the hyaluronic acid-heparin adhered acellular great saphenous vein patch in vivo. After the hyaluronic acid-heparin is adhered to the acellular great saphenous vein, the surface of the great saphenous vein becomes smooth; the hyaluronic acid-heparin adhered acellular human great saphenous vein patch has a relatively strong antithrombotic effect in vitro; and in vivo, intimal hyperplasia thickness can be significantly reduced after venous and arterial patch formation.