| 摘要 |
What is described is a minimally invasive system comprising an elongate sheath and an elongate instrument slidably disposed within a lumen of the sheath. The sheath includes a flexible tube portion including a plurality of slots, a sheath element, and a rigid tube section, wherein the flexible tube portion is fixedly coupled to a distal end of the sheath element, and the rigid tube section is fixedly coupled to a distal end of the flexible tube. The lumen extends through the sheath element, the flexible tube portion, and the rigid tube section and defines a longitudinal axis of the sheath. The instrument includes a rigid distal portion adapted to slide between a retracted configuration in which the rigid distal portion is retracted within the rigid tube section and an extended configuration in which the rigid distal portion at least partially extends from the rigid tube section. |
