Ultrasonic surgical instruments
First Claim
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1. A surgical instrument, comprising:
- a transducer configured to generate an acoustic standing wave of vibratory motion along a longitudinal axis, wherein the transducer comprises a piezoelectric stack positioned along the longitudinal axis, wherein the transducer is configured to resonate at a predetermined vibrational frequency, wherein a wavelength of the acoustic standing wave corresponds to the predetermined vibrational frequency, and wherein a length of the transducer is less than ½
of the wavelength of the acoustic standing wave; and
an end effector acoustically coupled to and extending distally from the transducer along the longitudinal axis;
wherein a sum of the length of the transducer and a length of the end effector is an integer multiple of ½
of the wavelength of the acoustic standing wave.
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Abstract
A surgical instrument including a transducer and an end effector is disclosed. The transducer may be configured to generate an acoustic standing wave of vibratory motion along a longitudinal axis and may include a piezoelectric stack positioned along the longitudinal axis. A length of the transducer may be less than ½ of the wavelength of the acoustic standing wave. The end effector may be acoustically coupled to and may extend distally from the transducer along the longitudinal axis. A sum of the length of the transducer and a length of the end effector may be an integer multiple of ½ of the wavelength of the acoustic standing wave.
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Citations
18 Claims
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1. A surgical instrument, comprising:
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a transducer configured to generate an acoustic standing wave of vibratory motion along a longitudinal axis, wherein the transducer comprises a piezoelectric stack positioned along the longitudinal axis, wherein the transducer is configured to resonate at a predetermined vibrational frequency, wherein a wavelength of the acoustic standing wave corresponds to the predetermined vibrational frequency, and wherein a length of the transducer is less than ½
of the wavelength of the acoustic standing wave; andan end effector acoustically coupled to and extending distally from the transducer along the longitudinal axis; wherein a sum of the length of the transducer and a length of the end effector is an integer multiple of ½
of the wavelength of the acoustic standing wave. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A surgical instrument, comprising:
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a transducer configured to provide a wave of longitudinal vibratory motion along a longitudinal axis, wherein the transducer comprises a piezoelectric stack positioned along the longitudinal axis, wherein the transducer is configured to resonate at a predetermined frequency, wherein a wavelength of the wave corresponds to the predetermined frequency, and wherein a length of the transducer is greater than or equal to ¼
of the wavelength of the wave and less than ½
of the wavelength of the wave; andan end effector coupled to and extending distally from the transducer along the longitudinal axis; wherein a sum of the length of the transducer and a length of the end effector is an integer multiple of ½
of the wavelength of the wave. - View Dependent Claims (14)
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15. A surgical instrument, comprising:
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a transducer configured to generate an acoustic wave of vibratory motion along a longitudinal axis at a predetermined frequency, wherein a length of the transducer is less than ½
of a wavelength of the acoustic wave; andan end effector coupled to a distal end of the transducer, wherein the end effector comprises; a waveguide coupled to and extending distally from the transducer; and a blade coupled to and extending distally from the waveguide; wherein a sum of the length of the transducer, a length of the waveguide, and a length of the blade is an integer multiple of ½
of the wavelength of the acoustic wave. - View Dependent Claims (16, 17, 18)
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Specification