Surgical retractor having a flexible air-impermeable bag

A surgical retractor for positioning within a surgical working space within a body of a patient, the surgical retractor comprising:

• a frame having
• a support structure,
• a first extending arm and a second extending arm that both extend from the support structure, and
• a locking mechanism configured to lock the first extending arm and the second extending arm into a locked position;
• a flexible air-impermeable bag surrounding an interior region and extending from a first end through a central region to a second end;
• a first port in the central region, the flexible air-impermeable bag surrounding a first channel that extends from the first port towards the first end;
• a second port in the central region, the flexible air-impermeable bag surrounding a second channel that extends from the second port toward the second end;
• and
• a plurality of beads within the interior region of the flexible air-impermeable bag,
• wherein
• the first channel is configured to receive the first extending arm,
• the second channel is configured to receive the second extending arm, and
• the flexible air-impermeable bag is configured to rigidify about the plurality of beads in response to air being evacuated from the interior region to position and hold intra-incision contents within the surgical working space within the body of the patient.