Systems and methods for treatment of BPH

• US 8,372,065 B2
• Filed: 11/06/2009
• Issued: 02/12/2013
• Est. Priority Date: 11/06/2008
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: NxThera, Inc (Boston Scientific Corporation)
• Inventors: Hoey, Michael, Shadduck, John H.
• Primary Examiner(s): Dvorak, Linda
• Assistant Examiner(s): Ram, Jocelyn D
• Application Number:
  US12/614,226
• Publication Number:
  US 20100145326A1
• Time in Patent Office: 1,194 Days
• Field of Search: 606/27, 606/41, 607/104, 607/105, 607/113, 604/113, 604/22, 604/500, 604/517
• US Class Current: 606/27
• CPC Class Codes: A61B 17/3203 Fluid jet cutting instruments
• CPC Class Codes: A61B 17/32037 for removing obstructions from inner organs or blood vessels, e.g. for atherectomy
• CPC Class Codes: A61B 17/32056 Surgical snare instruments for removing or smashing calculi A61B2017/2212; tonsillotomes A61B17/26
• 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 18/1485 having a short rigid shaft for accessing the inner body through natural openings
• CPC Class Codes: A61B 2017/00274 Prostate operation, e.g. prostatectomy, turp, bhp treatment
• CPC Class Codes: A61B 2017/22067 Blocking; Occlusion A61B2017/22054 takes precedence
• CPC Class Codes: A61B 2017/22079 with suction of debris
• CPC Class Codes: A61B 2017/32035 with gas or air
• CPC Class Codes: A61B 2018/00547 Prostate
• CPC Class Codes: A61B 2018/00577 Ablation
• CPC Class Codes: A61B 2018/0063 Sealing
• CPC Class Codes: A61B 2018/048 in gaseous form

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 from the urethra. 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 extracting tissue from a patient'"'"'s prostate comprising:

introducing a tissue extraction member into a urethra of the patient;

rotating the tissue extraction member within the urethra;

injecting condensable vapor from the tissue extraction member; and

aspirating prostate tissue into the tissue extraction member.

2. The method of claim 1 further comprising injecting high pressure liquid from the tissue extraction member into the urethra.

3. The method of claim 2 wherein the step of injecting high pressure liquid comprises injecting high pressure liquid in pulses between 1 pulse/second and 100 pulses/second.

4. The method of claim 2 wherein the step of injecting high pressure liquid comprises injecting high pressure liquid radially outward from a longitudinal axis of the tissue extraction member.

5. The method of claim 2 wherein the step of injecting high pressure liquid comprises injecting high pressure liquid at an angle of between 10 degrees and 90 degrees from a longitudinal axis of the tissue extraction member.

6. The method of claim 1 further comprising expanding an occlusion member within the urethra distal to a tissue extraction member vapor exit port prior to the injecting step.

7. The method of claim 1 further comprising expanding an occlusion member within the urethra proximal to a tissue extraction member vapor exit port prior to the injecting step.

8. The method of claim 1 wherein the rotating step comprises rotating the tissue extraction member between 5 rpm and 10,000 rpm.

9. The method of claim 1 wherein the rotating step comprises manually rotating the tissue extraction member.

10. The method of claim 1 wherein the rotating step comprises rotating the tissue extraction member with a powered rotating motor.

11. The method of claim 1 further comprising heat sealing tissue margins around extracted tissue.

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

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

14. The method of claim 1 wherein the aspirating step comprises removing between 10 grams and 50 grams of prostate tissue from the prostate.