48 results about "Bypass grafting" patented technology

A system and method for opening a lumen in an occluded blood vessel, e.g., a coronary bypass graft, of a living being. The system comprises an atherectomy catheter having a working head, e.g., a rotary impacting impeller, and a debris extraction sub-system. The atherectomy catheter is located within a guide catheter. The working head is arranged to operate on, e.g., impact, the occlusive material in the occluded vessel to open a lumen therein, whereupon some debris may be produced. The debris extraction sub-system introduces an infusate liquid at a first flow rate adjacent the working head and withdraws that liquid and some blood at a second and higher flow rate, through the guide catheter to create a differential flow adjacent the working head, whereupon the debris is withdrawn in the infusate liquid and blood for collection outside the being's body. The introduction of the infusate liquid may also be used to establish an unbalanced flow adjacent the working head to enable the atherectomy catheter to be steered hydrodynamically. A guide wire having an inflatable balloon on its distal end may be used with the atherectomy catheter to block the flow of debris distally, while enabling distal tissues to be perfused with an oxygenating liquid. At least one flow control port may be provided in the guide catheter to prevent collapse of the vessel being revascularized. A cradle is provided to fix the guide catheter and guide wire in position within the body of the being while enabling the atherectomy catheter to be advanced along the guide wire and through the guide catheter.

Devices, systems and methods for transvascular interstitial interventions, including transvascular, catheter based vascular bypass, transmyocardial revascularization, bypass grafting of blood vessels, and interstitial surgical/interventional procedures wherein a catheter is advanced translumenally through the vasculature to a desired location and an operative instrument is passed through the wall of a blood vessel and to a target location (e.g. another blood vessel, an organ, a tumor, another anatomical structure) such that one or more operative devices may be advanced to the target location to perform the desired operative or interventional procedure.

A vessel holder supports a blood vessel during processing for use in bypass graft surgery. The holder comprises a base and a first fixture mounted on the base for holding a first end of the blood vessel. The first fixture has a fluid supply needle for inserting into the first end of the blood vessel. A second fixture is mounted on the base a predetermined distance from the first fixture for holding a second end of the blood vessel. The predetermined distance is adjustable for holding the blood vessel under tension. The device reduces labor and time for vessel preparation. With various optional features, the device obtains safer application of pressurized saline solution when testing for leaks, better visualization for inspecting the vessel for surgical use, reliable protection of the vessel from accidental damage, and convenient immersion of the vessel in a bath for preservation until needed in the surgery.

A branching device for a blood vessel has a sleeve (10), which is radially extensible and has an opening (12) in its circumferential surface, and a collar (11) consisting of a fluid-tight material and fixed to the sleeve before the branching device is used. The collar has on the one hand a shoulder portion (13), which extends at least around the opening in the circumferential surface of the sleeve, and on the other hand, a neck portion (14) integral with the shoulder portion and projecting radially from the opening in the circumferential surface of the sleeve.

Minimally invasive techniques utilized in bypass grafting are disclosed. For instance, a method of implanting an end portion of a graft in the body of a patient during a bypass grafting procedure includes the steps of (i) advancing a medical instrument within a circulatory system of said body, (ii) guiding a distal end of said medical instrument out of said circulatory system through an opening defined in said circulatory system after said medical instrument advancing step, (iii) advancing said end portion of said graft within said medical instrument after said guiding step, and (iv) securing said end portion of said graft to a blood vessel of said circulatory system after said end portion advancing step.

The invention relates to a bioengineering technology, in particular to a small-caliber biotic artificial blood vessel with anti-thrombus formation and anti-intimal hyperplasia functions. Firstly, the key technology of accellular materials and natural polymer composition is used, and through multiple modes, neurotrophic factors are effectively coupled as functional modules to perform modification on blood vessel supports. Furthermore, through the strategy of constructing in body, the small-caliber engineering blood vessel modified by the neurotrophic factors is transplanted in body, the scour and the pressure of hemodynamics are overcome in body, endothelial progenitor cells in circulation are captured initiatively, the endothelial progenitor cells are further induced to differentiate into endothelial cells in situ, and the progress and the quality of endothelialization of blood vessel graft are speeded. Meanwhile, the generation of blood capillaries is promoted and nurtured, the blood vessel implants are promoted to remodel in body, therefore, the effects of anti-thrombus formation and anti-intimal hyperplasia can be effectively achieved, and the patency rate after the small-caliber biotic artificial blood vessel is transplanted is increased. Active small-caliber tissue engineering blood vessels used for coronary arterie bypass grafting, hematodialysis and cerebrovascular replacement in clinic are built.

The invention discloses a cardiovascular and cerebrovascular disease therapeutic apparatus capable of positioning function recovery therapy, preventing hypertension and cardiovascular and cerebrovascular diseases, and carrying out clinic therapy and first-aid, which consists of an oxygen inhalation horizontal exerciser and a massager and utilizes physical and chemical medicine combination treatment; the oxygen inhalation horizontal exerciser consists of a bed body, an oxygen inhalation device and a rotary wheel, for oxygen inhalation, respiratory administration, recovering abdominal breathing function and reducing blood pressure, which is combined with medicine oral administration, and the massager comprises medicine cloth and a massage head for medically massaging rigid muscle and activating blood, which is combined with local medicine injection; the invention is based on treatment principle and method of serious diseases, aims at the cause of hypertension and cardiovascular and cerebrovascular diseases to be function reduction and structural damage which are restricted by each other, and integrates function recovery with existing treatment of medicine, operation, and bypass grafting injury protection which can promote one another. The invention can cure cardiovascular and cerebrovascular diseases by treatment of disease cause.

A tissue punch which is configured to operate by utilizing a spring force to compress tissue between a rotatable cutter blade and a tissue piercing element. The tissue punch is configured such that once the spring force is applied, the cutter blade can be selectively rotated by the user. The rotation of the blade, assisted by the compression from the spring force, causes the cutter blade to cut through the tissue. Three different methods for creating an anastomosis for locating a bypass graft are disclosed. In each method, bypass graft material is installed on a tissue punch and then sutured. Depending on the method, the tissue is punched either before or after the suturing.

The present invention is directed to extraluminal femoropopliteal bypass grafts and methods and instruments for inserting the same. In an embodiment, the invention includes a method for inserting a femoropopliteal bypass graft including forming a first aperture in a first wall of a first artery, forming a second aperture in a second wall of the first artery, forming an extraluminal tract between the second aperture and a second artery, forming a third aperture in the second artery, and passing the femoropopliteal bypass graft through the first and second apertures, through the extraluminal tract, and into the third aperture. In some embodiments, the invention includes a femoropopliteal bypass graft having multiple layers. In some embodiment, the invention includes instruments used for percutaneously inserting a femoropopliteal bypass graft.

A device, system and methods for a minimally invasive bypass procedure, includes a graft having a supporting segment, an extending segment and a bypass segment. The supporting segment includes a flexible portion and a supporting member, and the extending segment includes a flexible portion and a supporting member. The extending segment has an initial configuration wherein it is unextended and a final configuration wherein it is extended proximally into the vessel. The bypass segment is positioned outside of the vessel to be treated, and the supporting segment is positioned within the vessel and distal to the incision. Once the supporting segment and the supporting member are anchored in place, the extending segment is extended proximally past the incision site. Thus, the supporting segment and the extending segment are substantially aligned, and allow for blood flow through the vessel while also providing blood flow around an obstruction via the bypass segment.