摘要:
An assembly for packaging a catheter includes flexible tubing capable of being coiled, and tubular retainer having a passageway extending therethrough. The tubular retainer includes a distal section for coupling to a proximal end of the tubing. A proximal end of the tubular retainer includes an opening for receiving a luer of the catheter assembly. A keyway is provided at a proximal end of the tubular retainer, the keyway being adapted to receive an inflation port of the luer. The keyway may include a snap point at a proximal end thereof, wherein the snap point is dimensioned such that a force is required to pass the inflation port past the snap point, thereby resulting in a snap fit. The keyway may include an entry portion beginning at the proximal end of the tubular retainer, and a nose portion disposed distal of the entry portion, with a snap point disposed therebetween. Depending on the length of the entry portion, a portion of the luer may be protected by the tubular retainer. The snap point provides a snap fit for the luer within the tubular retainer.
摘要:
A catheter and guide wire exchange system including a catheter that has a guide wire lumen with a guide way extending along a length of the proximal shaft. A guide member is slidably disposed about the proximal shaft for directing a guide wire into or out of the guide way and the guide wire lumen. A transition section joins the trilumen proximal shaft to a coaxial distal shaft.
摘要:
An assembly for packaging a catheter having a flexible distal shaft and a proximal fitting coupled thereto comprises a flexible tube capable of being coiled and having a proximal end. A tubular retainer having a passageway extending therethrough has a substantially oval proximal section and a substantially circular distal section, the distal section for fittingly receiving the proximal end of the flexible tube. A resilient member is coupled to a wall of the retainer and projects into the passageway for controllably impeding movement through the passageway.
摘要:
An assembly for packaging a catheter having a flexible distal shaft and a proximal fitting coupled thereto comprises a flexible tube capable of being coiled and having a proximal end. A tubular retainer having a passageway extending therethrough has a substantially oval proximal section and a substantially circular distal section, the distal section for fittingly receiving the proximal end of the flexible tube. A resilient member is coupled to a wall of the retainer and projects into the passageway for controllably impeding movement through the passageway.
摘要:
An arteriovenous shunt assembly including a shunt having a hollow bore between open first and second ends thereof and a valve slidably disposed through the hollow bore. The valve includes means for retaining the valve in a closed position or in any of various selected open positions that provide corresponding different rates of blood flow through the shunt assembly. In some embodiments, the AV shunt assembly is self-expandable from a collapsed tow-profile configuration employed during transluminal delivery. The valve position in the hollow bore may be adjusted in vivo by inflating a catheter balloon in a blood vessel to bear against an end of the valve. Methods for using the shunt assembly are also disclosed.
摘要:
A catheter system for positioning of an instrument within a body. The catheter system includes a hub defining a lumen therethrough for passage of the instrument and an elongate tubular member defining a lumen therethrough. The lumen of the tubular member is in communication with the lumen of the hub. The system also includes a slitter member that is coupled to the hub. The slitter member is disposed to slit the tubular member. The slitter further includes a moveable member that is moveably coupled to the hub and that is coupled to the tubular member, the moveable member is operable to advance the elongate tubular member toward the slitter member as the moveable member is moved relative to the hub. The slitter member thereby slits the elongate tubular member.
摘要:
A catheter system for positioning an instrument within a body that includes a hub defining a lumen therethrough for passage of the instrument toward the body. The catheter system also includes an elongate tubular member defining a lumen therethrough. The lumen of the elongate tubular member is in communication with the lumen of the hub for further passage of the instrument toward the body. The system also includes a slitter member that is coupled to the hub. The slitter member is disposed to slit the elongate tubular member as the elongate tubular member moves relative to the hub.
摘要:
According to an aspect of the invention there is provided a method and apparatus for delivering a medical stent to a treatment site for forming a conduit between a blood vessel and a heart chamber. The apparatus comprises a hollow cylindrical body having a proximal end and a distal end, the stent being positioned within the body; and an actuator for expelling the stent from the body to form the conduit.
摘要:
An apparatus for treating an occlusion in a vessel inside of a patient. The apparatus includes an external high intensity focused ultrasound transducer configured to be positioned outside of the vessel and to emit ultrasonic waves of energy to the occlusion and to detect ultrasonic waves of energy, an internal ultrasound transducer configured to be positioned inside of the vessel at a position adjacent to or inside the occlusion and to emit ultrasonic waves of energy for detection by the external high intensity focused ultrasound transducer, and a controller configured to control the ultrasonic waves of energy emitted by the external high intensity focused ultrasound transducer based on an electrocardiogram of the patient.
摘要:
A bifurcated catheter includes a first catheter branch having a first distal portion and a second catheter branch having a second distal portion. The first and second distal portions are linked together for delivery to the bifurcated region. Upon delivery to the bifurcated region, the first and second distal portions are released from each other such that the first and second catheter branches may be tracked into first and second vessel branches, respectively. The first and second distal portions can be linked together by an appendage disposed on the first distal portion that is sized and shaped such that the appendage fits snugly within a distal opening of the second distal portion, a cup disposed on the first distal portion that is sized and shaped to snugly receive the second distal portion, moving pocket disposed on the first distal portion and slidable relative to the first distal portion that is sized and shaped to snugly receive the second distal portion, or a sheath coupled to the first distal portion and wrapped around the second distal portion.