Adjustable liposuction cannula

A device for attachment to a suction device for removing fat from a body, comprising:

• a pair of nested hollow members that includes an inner hollow member and an outer hollow member, each of the nested hollow members having at least one opening;
• an adjustment member configured to change a relative orientation of the nested hollow members from a first overlapping configuration with a first amount of overlap between openings in the nested hollow members to a second overlapping configuration with a second amount of overlap between openings in the nested hollow members;
• and
• wherein the first amount of overlap defines a first passageway of a first size and the second amount of overlap defines a second passageway of a second size that is different from the first size, and the adjustment member comprises a securing member that is configured to restrict relative movement of the nested hollow members when in the first or second configurations,
• wherein the outer hollow member includes at least two sets of openings radially spaced apart along the circumference of the outer hollow member, and the adjustment member is configured to move the inner hollow member relative to the outer hollow member between (i) a first configuration in which passageways are formed at both of the at least two sets of openings spread out around a circumference of the device, and (ii) a second configuration in which passageways are formed at only one of the at least two sets of openings on a single circumferential sector of the device.