US 12,440,234 B2
Ultrasonic surgical instrument with a shaft assembly and elongated waveguide support arrangement
Brian D. Black, Loveland, OH (US); Matthew T. Stone, Mason, OH (US); Andrew T. Beckman, Cincinnati, OH (US); and Charles J. Scheib, Loveland, OH (US)
Assigned to Cilag GmbH International, Zug (CH)
Filed by Cilag GmbH International, Zug (CH)
Filed on Oct. 22, 2020, as Appl. No. 17/077,146.
Prior Publication US 2022/0125460 A1, Apr. 28, 2022
Int. Cl. A61B 17/32 (2006.01); A61B 34/00 (2016.01); A61B 34/30 (2016.01)
CPC A61B 17/320068 (2013.01) [A61B 34/30 (2016.02); A61B 34/70 (2016.02); A61B 2017/320074 (2017.08); A61B 2017/320088 (2013.01)] 20 Claims
OG exemplary drawing
 
18. A robotic surgical system, comprising:
(a) a patient support;
(b) a robotic arm moveable relative to the patient support; and
(c) an ultrasonic surgical instrument, comprising:
(i) an end effector including an ultrasonic blade,
(ii) an ultrasonic transducer assembly, and
(iii) a shaft assembly, including:
(A) an inner tube,
(B) an acoustic waveguide received within the inner tube and acoustically connected between the ultrasonic blade and ultrasonic transducer assembly to communicate ultrasonic vibrations from the ultrasonic transducer assembly to the ultrasonic blade, wherein the acoustic waveguide includes:
(I) an acoustic body extending along a longitudinal axis and defining a body radial diameter about the longitudinal axis,
(II) a first isolation structure radially extending about the acoustic body at a first radial diameter, wherein the first radial diameter is larger than the body radial diameter,
(III) a second isolation structure radially extending about the acoustic body at a second radial diameter and longitudinally spaced from the first isolation structure, wherein the first and second radial diameters are larger than the body radial diameter, and
(IV) a damping structure proximally positioned relative to each of the first and second isolation structures, and
(C) a sheath radially positioned between the first isolation structure and the inner tube and further radially positioned between the second isolation structure, wherein the sheath is configured to acoustically isolate the acoustic waveguide from the inner tube; and
(D) an outer tube disposed around the inner tube.
 
20. An ultrasonic surgical instrument, comprising:
(a) an end effector including an ultrasonic blade;
(b) an ultrasonic transducer assembly; and
(c) a shaft assembly, including:
(i) a tube,
(ii) an acoustic waveguide received within the tube and acoustically connected between the ultrasonic blade and ultrasonic transducer assembly to communicate ultrasonic vibrations from the ultrasonic transducer assembly to the ultrasonic blade, wherein the acoustic waveguide includes:
(A) an acoustic body extending along a longitudinal axis and defining a body radial diameter about the longitudinal axis,
(B) a first isolation structure radially extending about the acoustic body at a first radial diameter, wherein the first radial diameter is larger than the body radial diameter,
(C) a second isolation structure radially extending about the acoustic body at a second radial diameter and longitudinally spaced from the first isolation structure, wherein the first and second radial diameters are larger than the body radial diameter, and
(D) one or more damping structures extending about the acoustic body and configured to dampen longitudinal vibrations, and
(iii) a sheath radially positioned between the first isolation structure and the tube and further radially positioned between the second isolation structure and the tube, wherein the sheath is flexible and is configured to acoustically isolate the acoustic waveguide from the tube.