Methods, systems and devices for automated limb-based weight estimation

A disposable strip configured to be applied around a limb of a patient, the strip being movable between an unmounted position and a mounted position, and when in the mounted position, the disposable strip forms a variable circumference that engages around the limb, the disposable strip having:

• a first portion and a second portion, the first portion including a plurality of indicators and the second portion being configured to receive an encoder module;
• and
• a tensioning mechanism for varying the circumference, the tensioning mechanism having a sliding member and a resistance member,
• wherein the sliding member is operable to move past the resistance member in a first direction to decrease the circumference and is resisted from moving in a second direction opposite the first direction by the resistance member.