Handheld electromechanical surgical system

#The present disclosure relates to surgical devices. More specifically, the present disclosure relates to handheld electromechanical surgical systems for performing surgical clamping, stapling, and cutting procedures.

#One type of surgical device is a circular clamping, stapling, and cutting device. Circular staplers are used in a surgical procedure to adjoin hollow structures such as colon and rectum that were previously transected, or similar procedures. Conventional circular clamping, cutting and stapling instruments include a pistol or linear grip-styled structure having an elongated shaft extending therefrom and a staple cartridge supported on the distal end of the elongated shaft. In this instance, a physician may insert an anvil assembly of the circular stapling instrument into a rectum of a patient and maneuver the anvil assembly up the colonic tract of the patient toward the transected rectum portions. The physician may also insert the remainder of the circular stapling instrument (including the cartridge assembly) through an incision and toward the transected rectum portions. The anvil and cartridge assemblies are approximated toward one another and staples are ejected from the cartridge assembly toward the anvil assembly to form the staples in tissue to affect an end-to-end anastomosis, and an annular knife is fired to core a portion of the clamped tissue portions. After the end-to-end anastomosis has been effected, the circular stapling apparatus is removed from the surgical site.

#A number of surgical device manufacturers have developed product lines with powered drive systems for operating and/or manipulating the surgical device. In many instances the surgical devices, i.e., powered surgical staplers, include a powered handle assembly and an adapter assembly, which are reusable, and a disposable staple cartridge assembly that is selectively connected to the adapter assembly prior to use. The adapter assembly includes multiple transmission assemblies, e.g., drive shafts, which transmit actuation from the powered handle to the disposable staple cartridge. The powered surgical staplers operate in three sequences, namely, clamping, stapling, and cutting. Clamping approximates tissue grasped between an anvil and a cartridge assembly and compresses the tissue. This sequence prepares the tissue to receive staples. There is a need for a powered surgical stapler having an automated clamping process configured to achieve adequate tissue relaxation and dissipation of stored energy.

#Embodiments of the present disclosure are described herein with reference to the accompanying drawings, wherein:

#FIG. 1 is a perspective view of a handheld surgical instrument including a handle assembly, an adapter assembly, and an end effector, according to an embodiment of the present disclosure;

#FIG. 2 is a schematic diagram of the handle assembly, the adapter assembly, and the end effector of FIG. 1;

#Embodiments of the presently disclosed surgical devices, and adapter assemblies for surgical devices and/or handle assemblies are described in detail with reference to the drawings, in which like reference numerals designate identical or corresponding elements in each of the several views. As used herein the term “distal” refers to that portion of the surgical instrument, or component thereof, farther from the user, while the term “proximal” refers to that portion of the surgical instrument, or component thereof, closer to the user.

#The present disclosure provides a powered circular stapler 1 having a handle assembly, an adapter assembly coupled to the handle assembly, and an end effector coupled to the adapter assembly. The stapler allows for full, independent control of three functions: clamping, stapling, and cutting. This allows certain portions of the stapler to adapt if the tissue presents a non-ideal situation.

#FIG. 1 illustrates a surgical device, such as, for example, a powered circular stapler 1 for forming end-to-end anastomosis (“EEA”), including a handle assembly 100, which is configured for selective connection with an adapter assembly 200. The adapter assembly 200 is configured for selective connection with an end effector 300, which includes a reload 400 and an anvil assembly 500. The end effector 300 is configured to produce a surgical effect on tissue of a patient, namely, forming an anastomosis by connecting two portions of a structure (e.g., intestine, colon, etc.) by clamping, stapling, and cutting tissue grasped within the end effector 300.