Bipolar cutter/coagulator
AssigneesJerry L. Malis, Leonard I. Malis
InventorsJerry L. Malis, Leonard I. Malis, Robert R. Acorcey, David Solt
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Abstract
A bipolar cutter/coagulator produces a coagulating waveform comprising an aperiodic sequence of damped RF bursts. The inter-burst spacing is pseudo-random, and the intra-burst RF frequency is swept between preset limits. The burst envelopes are uniform, always starting at the same preselected amplitude.
Claims92
Electrosurgical apparatus, comprising:
- a bipolar electrode,
- means for electronically synthesizing an aperiodic sequence of uniform-width bursts of a high frequency signal,
- means for impressing substantially identical decaying amplitude envelopes on said bursts, each of said envelopes having a predetermined rate of change from a preselected initial amplitude, and
- means for applying said impressed bursts to said electrode.
Electrosurgical apparatus comprising:
- a bipolar electrode,
- means for electronically synthesizing an aperiodic sequence of uniform-width bursts of a high frequency signal, means for impressing substantially identical predetermined decaying amplitude envelopes on said bursts, each of said envelopes having a predetermined rate of change from a preselected initial amplitude,
- means for varying the frequency of said high frequency signal within said bursts, and
- means for applying said impressed bursts to said electrode.
Electrosurgical apparatus, comprising:
- a bipolar electrode,
- manually actuable means for generating a mode signal indicative of whether the appartus is to operate in a coagulate mode or in a cut mode,
- means for electronically synthesizing an aperiodic sequence of uniform-width bursts of a high frequency signal when said mode signal indicates operation in the coagulate mode, said bursts having substantially identical decaying amplitude envelopes, each of said envelopes having a predetermined rate of change from a preselected initial amplitude,
- means for varying the frequency of said high frequency signal within said bursts,
- means for generating a continuous, substantially uniform amplitude high frequency signal when said mode signal indicates operation in the cut mode, and
- means for selectably applying said bursts and said uniform aplitude high frequency signal to said electrode.
Electrosurgical apparatus comprising:
- a bipolar electrode,
- means for electronically synthesizing a sequence of aperiodic trigger pulses,
- means for electronically synthesizing a burst of ramped high frequency pulses in response to each of said trigger pulses, said high frequency pulses having successive amplitudes which decrease at a predetermined rate,
- means for electronically synthesizing a damped high frequency sinusoidal signal in response to each of said bursts of ramped high frequency pulses, and
- means for applying said damped high frequency sinusoidal signal to said electrode.
Electrosurgical apparatus according to claim 75 including circuitry for causing said intervals of time of preselected duration to be 6 milliseconds long and said dead zones to be 3 milliseconds long,
Electrosurgical apparatus, comprising:
- a bipolar electrode,
- means for electronically synthesizing an aperiodic sequence of uniform-width bursts of a damped high frequency sinusoidal voltage signal,
- means for varying the frequency of said high frequency sinusoidal voltage signal within the bursts, and
- means for applying said bursts to said electrode.
Electrosurgical method of coagulating vessels, tissue, or the like, comprising:
- generating a power signal at bipolar forceps, said power signal comprising an aperiodic sequence of uniform-width bursts of a high frequency signal,
- impressing substantially identical decaying amplitude envelope on said bursts, each of said envelopes having a predetermined rate of change from a preselected initial amplitude, and
- applying said forceps to said vessels, tissue or the like.
Electrosurgical method of coagulating vessels, tissue and the like, comprising:
- generating a power signal at bipolar forceps, said power signal comprising an aperiodic sequence of uniform-width bursts of a high frequency signal,
- impressing substantially identical decaying amplitude envelope on said bursts, each of said envelopes having a predetermined rate of change from a preselected initial amplitude,
- varying the frequency of said high frequency signal within said bursts, and
- applying said forceps to said vessels, tissue or the like.
Dependencies are inferred from the claim text.