Tissue resection and treatment with shedding pulses

Patent metadata

Field	Value
Publication number	US-9510853-B2
Application number	US-201514816747-A
Country	US
Kind code	B2
Filing date	Aug 3, 2015
Priority date	Mar 6, 2009
Publication date	Dec 6, 2016
Grant date	Dec 6, 2016

Abstract

A fluid stream is directed toward tissue to generate a plurality of shedding clouds. The fluid stream can be scanned such that the plurality of shedding clouds arrive a different overlapping locations. Each of the plurality of shedding clouds can remove a portion of the tissue. In many embodiments, an apparatus to ablate tissue comprises a source of pressurized fluid, and a nozzle coupled to the source of pressurized fluid to release a fluid stream, in which the fluid stream generates a plurality of shedding clouds.

First claim

What is claimed is:

1. An apparatus to abate tissue, the apparatus comprising:
a source of pressurized fluid; and
a nozzle coupled to the source of pressurized fluid to release a fluid stream, wherein the nozzle and the source are configured to generate a plurality of shedding clouds with a characteristic frequency, wherein each of the plurality of shedding clouds comprises cavitation regions and is configured to remove a portion of the tissue;
wherein the source of pressurized fluid comprises a pump having a pumping frequency less than the characteristic frequency of the plurality of shedding clouds.

2. The apparatus of claim 1 , further comprising a scanner coupled to the nozzle to ablate the tissue with partially overlap of the plurality of shedding clouds.

3. The apparatus of claim 1 , wherein the fluid stream comprises a first liquid, the apparatus further comprising an irrigation opening to irrigate the tissue with a second liquid.

4. The apparatus of claim 3 , wherein the first liquid comprises saline and the second liquid comprises saline.

5. The apparatus of claim 1 , wherein the nozzle comprises a Strouhal number within a range from about 0.02 to about 0.03.

6. The apparatus of claim 1 , wherein the characteristic frequency is within a range from about 1 k Hz to about 10 kHz.

Assignees

• Procept Biorobotics Corp

Inventors

• Aljuri Nikolai
• Mantri Surag
• Baez Luis
• Surjan George
• Sasnett Michael W
• Foote Jonathan

Classifications

• A61B2018/00547

  Prostate · CPC title

• A61B2018/00285

  Balloons · CPC title

• A61B2018/2272

  with reflective or refractive surfaces for deflecting the beam (A61B2018/2261, A61B2018/2266 take precedence) · CPC title

• A61B2018/1472

  for use with liquid electrolyte, e.g. virtual electrodes · CPC title

• A61B18/12

  by passing a current through the tissue to be heated, e.g. high-frequency current · CPC title