Ultrasonic surgical instruments

1. An ultrasonic surgical instrument, comprising:

a housing having an elongated shaft extending therefrom;

first, second, and third jaw members disposed at a distal end of the shaft, the first jaw member movable relative to the shaft and each of the second and third jaw members between a first position and a second position, the second and third jaw members movable relative to one another between an open configuration and a clamping configuration, wherein when the first jaw member is in the second position and the second and third jaw members are in the clamping configuration, the first jaw member is nested within the second jaw member.

2. The ultrasonic surgical instrument according to claim 1 , wherein a lever is operably coupled to the housing and is moveable through a clamping stroke to move the first jaw member from the first position to the second position and the second and third jaw members from the open configuration to the clamping configuration, the lever further movable through a release stroke to move the first jaw member from the second position to the first position and the second and third jaw members from the clamping configuration to the open configuration.

3. The ultrasonic surgical instrument according to claim 1 , wherein the third jaw member includes an elongated slot defined in a tissue contacting surface thereof and the first jaw member includes a corresponding elongated slot defined in a tissue contacting surface thereof, the slots in vertical registration with one another and configured to receive a cutting blade therein when the first jaw member is in the second position and the second and third jaw members are in the clamping configuration.

4. The ultrasonic surgical instrument according to claim 1 , wherein the second jaw member includes a generally arcuate configuration and the first jaw member includes a complementary configuration to facilitate nesting of the first jaw member within the second jaw member.

5. The ultrasonic surgical instrument according to claim 1 , wherein at least one of the second or third jaw members includes at least one sensor disposed thereon configured to detect moisture content of tissue of interest.

6. The ultrasonic surgical instrument according to claim 5 , wherein the at least one sensor communicates a detected moisture content of tissue of interest to a controller operably associated with the ultrasonic surgical instrument.

7. The ultrasonic surgical instrument according to claim 6 , wherein the controller is configured to provide an indication to a user that the tissue of interest is ready to be treated.

8. The ultrasonic surgical instrument according to claim 1 , wherein a cutting blade is movable along a longitudinal axis defined through the shaft from a retracted configuration positioned within the shaft to an extended configuration position outside the shaft.

9. An ultrasonic surgical instrument, comprising:

an end effector having first, second, and third jaw members pivotally movable relative to one another, the first jaw member movable relative to each of the second and third jaw members between a first position and a second position, the second and third jaw members movable relative to each other between an open configuration and a clamping configuration, wherein when the second and third jaw members are in the clamping configuration, the first jaw member is nested within the second jaw member.

10. The ultrasonic surgical instrument according to claim 9 , wherein the third jaw member includes an elongated slot defined in a tissue contacting surface thereof and the first jaw member includes a corresponding elongated slot defined in a tissue contacting surface thereof, the slots in vertical registration with one another and configured to receive a cutting blade therein when the first jaw member is in the second position and the second and third jaw members are in the clamping configuration.

11. The ultrasonic surgical instrument according to claim 9 , wherein the second jaw member includes a generally arcuate configuration and the first jaw member includes a complementary configuration to facilitate nesting of the first jaw member within the second jaw member.

12. The ultrasonic surgical instrument according to claim 9 , wherein at least one of the second or third jaw members includes at least one sensor disposed thereon configured to detect moisture content of tissue of interest.

13. The ultrasonic surgical instrument according to claim 12 , wherein the at least one sensor communicates a detected moisture content of tissue of interest to a controller operably associated with the ultrasonic surgical instrument.

14. The ultrasonic surgical instrument according to claim 13 , wherein the controller is configured to provide an indication to a user that the tissue of interest is ready to be treated.

15. A method for ultrasonically treating tissue of interest, comprising:

positioning tissue of interest adjacent a first jaw member and between second and third jaw members of an ultrasonic instrument; and

approximating the second and third jaw members toward one another to clamp the tissue of interest, wherein approximating the second and third jaw members toward one another moves the first jaw member relative to each of the second and third jaw members such that the first jaw member is nested within the second jaw member.

16. The method according to claim 15 , further including activating a cutting blade to treat the clamped tissue of interest.

17. The method according to claim 16 , further including detecting a moisture content of tissue of interest.

18. The method according to claim 17 , further including:

communicating the detected moisture content of tissue of interest; and

providing an indication that the tissue of interest is ready to be treated.

19. The method according to claim 16 , wherein prior to approximating the second and third jaw members, the cutting blade is actuated to move from a retracted configuration to an extended configuration.