摘要:
A biopsy system is discloses that includes a percutaneous biopsy needle and an inner cannula. The percutaneous biopsy needle includes an internal passageway. At a distal end, the percutaneous biopsy needle includes an expandable section. A distal section of the internal passageway of the percutaneous biopsy needle, which corresponds to the expandable section, is tapered to enable the expandable section to expand and collapse as the inner cannula is positioned within and/or moves through the tapered distal section. The inner cannula may be configured to aspirate a sample from a location of interest within a subject's body and, in some embodiments, may cooperate with the distal end of the percutaneous biopsy needle in a manner that facilitates removal of the sample from the subject's body. Biopsy methods are also disclosed.
摘要:
A composite wire, such as a guide wire, may include a principal section with a relatively large outer diameter, as well as one or more reduced sections with smaller outer diameters. The relatively small outer diameter of each reduced section may be defined by an inner element of the composite wire, while the relatively large outer diameter of the principal section may be defined by one or more outer elements that reside on, and may surround, the inner element. The inner and outer elements may be formed from materials that impart the composite wire with one or more desired characteristics, such as a stiffness, hardness and flexibility. In specific embodiments, the inner element may comprise a standard, small diameter guide wire, while the outer element comprises a tube formed from polyether ether ketone (PEEK). Each outer element may be secured to the inner element at one or more locations. Differences in characteristics between locations where the outer element has been coupled to the inner element and locations where the outer element merely resides on the inner element may be used to tailor characteristics of the composite wire.
摘要:
A composite wire, such as a guide wire, may include a principal section with a relatively large outer diameter, as well as one or more reduced sections with smaller outer diameters. The relatively small outer diameter of each reduced section may be defined by an inner element of the composite wire, while the relatively large outer diameter of the principal section may be defined by one or more outer elements that reside on, and may surround, the inner element. The inner and outer elements may be formed from materials that impart the composite wire with one or more desired characteristics, such as a stiffness, hardness and flexibility. In specific embodiments, the inner element may comprise a standard, small diameter guide wire, while the outer element comprises a tube formed from polyether ether ketone (PEEK). Each outer element may be secured to the inner element at one or more locations. Differences in characteristics between locations where the outer element has been coupled to the inner element and locations where the outer element merely resides on the inner element may be used to tailor characteristics of the composite wire.
摘要:
Percutaneous access systems, including trocars, for accessing desired locations within a subject's body through the subject's skin or other tissues that are configured to minimize incision sizes are disclosed. Such a percutaneous access system includes a cannula and an obturator. The cannula includes a passageway with a tapered section and an expandable section at its distal end. The expandable section may include leaves that are configured to extend radially outward as an elongated instrument that has an outer diameter that exceeds a minimum relaxed inner diameter of the tapered section of the passageway is forced through the tapered section. Methods for using such a percutaneous access system, including medical procedures, are also disclosed.
摘要:
A biopsy system is discloses that includes a percutaneous biopsy needle and an inner cannula. The percutaneous biopsy needle includes an internal passageway. At a distal end, the percutaneous biopsy needle includes an expandable section. A distal section of the internal passageway of the percutaneous biopsy needle, which corresponds to the expandable section, is tapered to enable the expandable section to expand and collapse as the inner cannula is positioned within and/or moves through the tapered distal section. The inner cannula may be configured to aspirate a sample from a location of interest within a subject's body and, in some embodiments, may cooperate with the distal end of the percutaneous biopsy needle in a manner that facilitates removal of the sample from the subject's body. Biopsy methods are also disclosed.