| 摘要 |
According to the present invention there is provided a device (12000) for providing access to a surgical location within a patient, said device (12000) comprising: an elongate body (12004) having an outer surface (12008), an inner surface (12012), and a distal portion (12016), said inner surface defining a passage (12020) extending through the elongate body along a longitudinal axis (12024) through which surgical instruments can be inserted to the surgical location, said distal portion capable of having an expanded configuration when inserted within the patient wherein the cross-sectional area of said passage (12020) at a first location (12028) is greater than the cross-sectional area of said passage at a second location (12032), wherein the first location is distal to the second location; and characterized in that one or more sleeves (12006) are configured to be fixed relative to said elongate body (12004) along the longitudinal axis to increase or to decrease the length of the passage along the longitudinal axis, wherein said increase or decrease in the length of the passage is independent of the actuation of the distal portion of the elongate body. |
