| 摘要 |
A needle assembly and delivery system for biopsying tissue of a patient includes a flexible biopsy needle, a cannula for receiving and supporting the biopsy needle, and a guide assembly which defines at least one guide assembly for receiving, guiding, and orienting the flexible biopsy needle and cannula through an angle of at least forty degrees through the needle guide assembly to a fixed orientation and position for biopsying tissue of the patient. The biopsy needle includes a sampling section which has smooth or rounded edges, a bending section which has a first circular cross-section, and a body portion proximal of the bending section which has a second circular cross-section larger than the first circular cross-section. The flexible biopsy needle, cannula, and guide assembly may be used with a biopsy ultrasound delivery system which includes an ultrasonic probe and a biopsy gun. |
| 主权项 |
1. A needle assembly for biopsying tissue of a patient, the needle assembly comprising:
a flexible biopsy needle having a proximal end, a tissue piercing distal end, a sampling section proximal of said tissue piercing distal end of said needle, said sampling section having a non-circular cross section, a bending section proximal of said sampling section, said bending section having a first circular cross-section, and a body portion proximal of said bending section, said body portion having a second circular cross-section larger than said first circular cross-section; and a cannula having a proximal end, a tissue piercing distal end, and an elongate body extending between said proximal end and said tissue piercing distal end of said cannula, said elongate body including a bendable portion adjacent said tissue piercing distal end of said cannula, said cannula defining a lumen through said elongate body and said tissue piercing distal end of said cannula, said biopsy needle insertable through said lumen of said cannula, wherein said needle assembly is configurable to an initial straight configuration in which said tissue piercing distal ends of said needle and said cannula are disposed adjacent each other, said bending section of said needle is disposed within said bendable portion of said cannula, and said bending section of said needle, said body portion of said needle, and said elongate body of said cannula are substantially straight and substantially symmetrical about a longitudinal axis extending through said needle assembly, and wherein said needle assembly is configurable to a bent configuration in which said tissue piercing distal ends of said needle and said cannula are disposed adjacent each other, said bending section of said needle is disposed within said bendable portion of said cannula, and said bending section of said needle and said bendable portion of said cannula extend through an angle of at least forty degrees. |
