Systems and methods for treatment of BPH
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.
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.