Methods for treatment of prostatic tissue

• US 8,419,723 B2
• Filed: 11/06/2009
• Issued: 04/16/2013
• Est. Priority Date: 11/06/2008
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: NxThera, Inc (Boston Scientific Corporation)
• Inventors: Shadduck, John H., Hoey, Michael
• Primary Examiner(s): Dvorak, Linda
• Assistant Examiner(s): Ram, Jocelyn D
• Application Number:
  US12/614,238
• Publication Number:
  US 20100145254A1
• Time in Patent Office: 1,257 Days
• Field of Search: 606/27, 607/104, 607/105, 607/113, 604/113
• US Class Current: 606/27
• CPC Class Codes: A61B 18/04 by heating by applying electromagnetic radiation A61B18/18; hyperthermia using electric or magnetic fields, radiation or ultrasound A61N
• CPC Class Codes: A61B 18/082 Probes or electrodes therefor
• CPC Class Codes: A61B 2018/00547 Prostate
• CPC Class Codes: A61B 2018/00577 Ablation
• CPC Class Codes: A61B 2018/048 in gaseous form
• CPC Class Codes: A61B 2218/007 Aspiration

Abstract

A prostate therapy system is provided that may include any of a number of features. One feature of the prostate therapy system is that it can access a prostate lobe transurethrally. Another feature of the prostate therapy system is that it can deliver condensable vapor into the prostate to ablate the prostate tissue. Another feature of the prostate therapy system is that it can aspirate tissue from the prostate. Yet another feature of the prostate therapy system is that it can rotate during delivery of vapor and aspiration of tissue. Methods associated with use of the prostate therapy system are also covered.

Claims

1. A method of treating a disorder of a prostate comprising:

introducing an ablation probe transurethrally into the prostate, the ablation probe having a longitudinal axis;

translating the ablation probe along the longitudinal axis while injecting condensable vapor through the ablation probe into the prostate; and

aspirating prostate tissue proximally through the ablation probe.

2. The method of claim 1 further comprising inserting an introducer into a urethra and advancing the ablation probe through the introducer.

3. The method of claim 1 wherein the introducing step comprises advancing the ablation probe into an apex of a lobe of the prostate.

4. The method of claim 1 further comprising removing a core of prostate tissue.

5. The method of claim 1 further comprising rotating the ablation probe.

6. The method of claim 1 further comprising injecting a high pressure liquid through the ablation probe into the prostate.

7. The method of claim 1 wherein injecting condensable vapor comprises delivering between 100 W and 1000 W to the prostate.

8. The method of claim 1 wherein injecting condensable vapor comprises delivering between 250 cal/gram and 450 cal/gram to the prostate.

9. The method of claim 1 further comprising removing between 10 grams and 50 grams of prostate tissue from the prostate.

10. The method of claim 1 further comprising extracting at least one region of prostate tissue while maintaining urethral patency.

11. The method of claim 1 wherein injecting condensable vapor comprises delivering between 100 cal/gram and 600 cal/gram to the prostate.

12. The method of claim 1 further comprising removing between 1 gram and 100 grams of prostate tissue from the prostate.