109 results about "Vascular catheter" patented technology

An inexpensive surgical stapler, such as for use in securing vascular catheters, has a plastic applicator made for use with a single staple. The applicator has a backbone and two identical arms. The inside face of the backbone has a retaining channel that secures the crown portion of the staple against movement. The inside faces of the arms have guidance grooves that direct the movement of the staple as the applicator arms are squeezed with finger pressure. The outside faces of the arms are configured to permit gripping by the operator's fingers. The stapler can be used in lieu of suturing. Other staple and applicator assemblies can include two or more of such assemblies.

A vascular catheter system comprises a catheter body having a proximal and distal portion and a single common lumen therebetween. The catheter body includes a first connector secured to the distal end of the proximal portion and a second connector secured to the proximal end of the distal portion. The connectors can be selectively connected to each other to join the lumens of the proximal and distal portions together in a continuous, axially fixed relationship. Disposed within the lumens, when the proximal and distal portions are joined together, is a drive cable. The drive cable may be movably, rotatable about its own longitudinal axis and carries at its distal end, a work element, which is typically an ultrasonic imaging transducer or interventional device. The lumen carrying the cable will be sufficiently large along a proximal portion to permit preferential collapse of the cable should rotation of the distal end become impeded. The catheter body may be made of a polymer or plastic material, such as polyetheretherketone (PEEK), which provides adequate bonding stiffness and resistance to kinking from large hoop stresses.

Methods of fabricating medical vascular catheters adapted to be inserted into a blood vessel from an incision through the skin of a patient for introducing other devices or fluids for diagnostic or therapeutic purposes and particularly methods for fabricating such catheters with catheter bodies having catheter sections of differing flexibility are disclosed. Such catheter bodies having a proximal catheter body end and a distal catheter body end and formed of a proximal section and at least one distal section that have differing flexibilities are formed in a process comprising the steps of: (1) forming a continuous tubular inner jacket preferably of an inner liner and a reinforcement layer; (2) forming initial layer segments having an initial layer thickness along the length of the inner jacket from a material of first durometer hardness, whereby each initial layer segment is separated by a separation distance: (3) forming a final layer of a material of second durometer hardness with a second layer thickness over the tubular inner jacket along the separation distances and over and/or against the proximal and distal initial layer ends of the initial layer segments to form a continuous catheter body tubing; (4) severing the continuous catheter body tubing into catheter body lengths including a proximal catheter section formed of the material of second hardness and a distal catheter section of the material of first hardness; and (5) completing the catheter fabrication at the proximal catheter body end and the distal catheter body end. Centerless grinding of the catheter body or body tubing, formation of Intermediate catheter body sections, distal soft tips, and discontinuities in the reinforcement layer formed prior to step (2) are also disclosed.

Guidewire for catheters which can be inserted into cavities, preferably coronary vessels of humans or animals, said guidewire being provided with electromagnetic receive or transmit locate to position its position in conjunction with corresponding external electromagnetic transmit or receive antennas, as well as with signal lines guiding the processing unit controlling the transmit antennas or transmit coils.

Systems and methods for delivering implantable devices, catheters, or substances in or near and/or restoring flow through body lumens, such as blood vessel lumens are described. A catheter having a proximal portion of a first diameter and a distal portion of a second diameter (smaller than the first diameter) is advanced into a body lumen. The distal portion of the catheter is caused to expand to a diameter that is larger than the second diameter but no larger than the first diameter. A working device is then advanced out of the distal end of the catheter and used to remove obstructive matter, deliver an implantable device or substance and/or restore flow. The distal portion can be reduced in diameter prior to removal from the body. A stand alone, guide catheter is also disclosed possessing high resistance to kinking even with a very thin wall.

The present invention relates to a safety clip device for shielding and retaining a tip of an introducer needle following insertion of a vascular catheter. The safety clip device includes a sleeve having an interlock system for locking together the sleeve and the catheter adapter. The sleeve houses a safety clip wherein a portion of the introducer needle extends through the safety clip and is pinched between arm portions of the safety clip. As the tip of the introducer needle is withdrawn from the catheter adapter, the tip of the introducer needle is retained in the safety clip, whereafter the safety clip is retained within the sleeve and the sleeve is released from the catheter adapter for safe disposal.

A catheter, particularly an intra-vascular catheter, has at least one magnetic field-generating element arranged in the catheter envelope in the region of the catheter tip, characterized in that the magnetic field of which is variable while the catheter is inserted into a patient.

The present invention provides a vascular conduit device including a deformable flange and complementary securing ring in cooperation for securing the device within an aperture defined in a tissue wall. The present invention further provides a system for implanting such a vascular conduit device in a tissue wall. More specifically, the present invention provides a system including a coring device for defining an aperture in a tissue wall (such as a ventricle and/or a blood vessel) and securely implanting a vascular conduit device therein so as to provide fluid communication between a first and second surface of the tissue wall via the vascular conduit device.

A catheter (100) having a first lumen (110) having a first distal tip (112) and a second lumen (130) having a second distal tip (132). The first and second distal tips (112,132) include openable portions that are normally closed when undeflected by lumen fluid pressure imbalance relative to the blood pressure of the patient. The first lumen (110) has an openable portion, flap (114) that opens proximally into the first lumen when the first lumen is under negative pressure to withdraw blood from the vessel through the first lumen to be dialysed (but that can open distally into the vessel under positive lumen pressure to permit blood flow into the vessel). The second lumen (130) extends distally beyond the first distal tip (112) to its second distal tip (132), and its openable portion is several lip sections (135) that are normally closed against each other when undeflected but that open outwardly when the second lumen is positively pressurized during hemodialysis, permitting blood to return to the patient's vessel.

A vascular access device having a spring-biased septum is provided for preventing the leakage of blood during the placement and use of vascular catheters and similar devices. The structure of the device includes a housing with an internal channel. A spring-biased septum is placed securely within the channel such that it substantially blocks blood flow through the channel. The spring-biased septum includes an elastic plug having a pre-slit or pre-molded hole and a biasing element disposed about the elastic plug. A needle or other object may be withdrawn through the slit or hole, after which the biasing element forces the hole closed, preventing blood leakage.

A catheter including an elongate body, a first cutting head and a second cutting head both having a blade, where the blades moves relative each other to provide a shearing action for cardiac tissue. The catheter can further include a stent positioned over an inflatable balloon, where the inflatable balloon can deploy the expandable stent over sheared cardiac tissue. The catheter can further be included in a system having a sheath, where at least a part of the catheter resides in the lumen of the sheath. The sheath further includes a cardiac valve and an expandable filter. The sheath can move relative the cardiac valve and the expandable filter to deploy the cardiac valve and at least a portion of the expandable filter proximal the inflatable balloon and the expandable stent.

A vascular catheter including a radially expandable initial dilation segment, such as an inflatable balloon and an expanded distal tip for releasably housing at least a portion of a thromboembolic protection device is disclosed. A vascular catheter including a shaft structured and arranged to at least partially house a thromboembolic protection device, a radially expandable initial dilation segment disposed on the shaft, and a radially expandable stent expanding segment disposed on the shaft, is also disclosed.

A device (10,110,210) for the expression of liquids, such as for the maintenance treatment of vascular catheters. A syringe (16;116a,116b;216) has a support structure (15,215) and includes at least two separate compartments (11,12;111,112;211,212) in which liquids for treating the lumen (L,283) of a catheter (C,280) with which the device is associated. The syringe further includes a closure plug (13,213) to be associated with the lumen being treated, which is coupled, by virtue of a releasable securement arrangement, to support structure (15,215). At least one plunger (16;116a,116b;216) is also included for infusing, in preset order, the different treatment liquids into the lumen to be treated, and the syringe further includes a duct (17,217) which is in fluid communication with the two compartments and is arranged through a through hole through the closure plug (13,213) in order to allow access of the treatment liquid to the interior of the lumen (L,283) upon activation of the plunger.

An angioplasty catheter comprising a catheter shaft having a proximal portion and a distal end, an angioplasty balloon attached to the shaft at the distal end, a balloon inflation lumen extending through the shaft and communicating with the interior of the balloon, a guidewire lumen extending through the shaft and through the balloon for receiving a steerable guidewire, the guidewire lumen having an outside wall, wherein the guidewire lumen has a proximal opening located at a point normally outside of the patient during use of the catheter for insertion of a guidewire into the lumen, and a side port adapted to permit passage of a guidewire into the lumen through the outside wall of the guidewire lumen, the side port located distally of the proximal opening and at a point normally inside of the patient during use, and guidewire removing means in the outside wall of the guidewire lumen extending from the proximal opening to the side port for permitting a guidewire in the guidewire lumen to be moved laterally from the guidewire lumen through the outside wall of the guidewire lumen. Also disclosed are a removable “Y” connector and methods for using the catheter and for exchanging catheters and guidewires during vascular catheterization procedures.

A vascular catheter and method of use of the catheter for aiding in balloon angioplasty and stent placement procedures are disclosed. The vascular catheter has a retrieval catheter with an expanded distal portion. The expanded distal portion has aspiration holes which allow aspiration of embolic debris during recovery of the embolic filter. A guide sheath may be used to guide the retrieval catheter past a stent and into position for aspiration and retrieval of the filter after stent placement.

A vascular catheter including a radially expandable segment, such as an inflatable balloon, and an expanded distal tip having an increased storage volume is disclosed. The inflatable balloon segment of the catheter may be used to provide traditional balloon angioplasty to a portion of a blood vessel narrowed by stenosis, and the expanded distal tip of the catheter apparatus may be used to safely capture, store, and remove a thromboembolic protection device such as an embolic filter used to catch pieces of plaque and other embolic material dislodged during the balloon angioplasty procedure. The catheter of the present invention provides an effective means for dilating a narrowed portion of a blood vessel, as well as preventing the need for deploying a second catheter system to capture and retrieve the embolic filter. The present invention also greatly reduces the chance for plaque and other thromboembolic material to escape from the embolic filter and enter the patient's bloodstream.