Tissue retrieval device with buckling arms

A surgical instrument for removal of material from a patient, the surgical instrument comprising:

• a. a retrieval bag configured to open and close;
• b. a first arm having a distal end and a proximal end, wherein the first arm is associated with the retrieval bag;
• c. a second arm having a distal end and a proximal end, wherein the second arm is associated with the retrieval bag, wherein the distal end of the second arm is in communication with the distal end of the first arm, and wherein the second arm is operable to move away from the first arm to open the retrieval bag;
• d. an actuator in communication with at least one of the first arm or the second arm, wherein the actuator is operable to translate longitudinally to urge the second arm away from the first arm to open the retrieval bag, wherein the actuator comprises a longitudinal recess;
• and
• e. a resilient member extending within the longitudinal recess, wherein the resilient member is configured to engage the proximal end of the first arm to resiliently bias the proximal end of the first arm away from the actuator.

A surgical instrument for removal of material from a patient, the surgical instrument comprising:

• a. a retrieval bag configured to open and close;
• b. a first arm having a distal end and a proximal end, wherein the first arm is associated with the retrieval bag;
• c. a second arm having a distal end and a proximal end, wherein the second arm is associated with the retrieval bag, wherein the distal end of the second arm is in communication with the distal end of the first arm, and wherein the second arm is operable to move away from the first arm to open the retrieval bag;
• d. an introducer tube comprising a passageway, wherein the first arm and the second arm are configured to extend through the passageway of the introducer tube;
• e. an actuating rod configured to fit within the passageway of the introducer tube, wherein the actuating rod is in communication with at least one of the first arm or the second arm, wherein the actuating rod is operable to translate longitudinally to urge the second arm away from the first arm to open the retrieval bag, wherein the actuating rod comprises a longitudinal recess;
• and
• f. a resilient member extending within the longitudinal recess, wherein the resilient member is parallel with a longitudinal axis defined by the introducer tube, wherein the resilient member is positioned proximally to the first arm, the resilient member configured to engage the proximal end of the first arm to resiliently bias the proximal end of the first arm away from the actuator.