公开(公告)号：GB2311468A

公开(公告)日：1997-10-01

申请号：GB9703792

申请日：1997-02-24

Applicant: VALLEYLAB INC

Inventor： CABAK JAMES ,  CLASEMAN BRYAN A ,  LAMBRECHT GREGORY H ,  WHITT JASON ,  MAKOWER JOSHUA

IPC: A61B18/14 ,  A61M1/00 ,  A61B17/39

公开(公告)号：FR2748648A1

公开(公告)日：1997-11-21

申请号：FR9705848

申请日：1997-05-13

Applicant: VALLEYLAB INC

Inventor： LAMBRECHT GREGORY H ,  RYAN THOMAS

IPC: A61B17/42 ,  A61B18/12 ,  A61B18/14 ,  A61F6/20 ,  A61N7/02 ,  A61B17/39

Abstract: An apparatus for transcervical sterilization or transcatheter embolization with a controlled bipolar RF catheter for creating thermal lesions in the fallopian tubes or thrombosing vessels has a catheter elongate along an axis thereof with a patient end. The catheter is circular and sized for transcervical insertion into the fallopian tube or transcatheter vessel insertion, respectively. A connector on an end of the catheter opposite the patient end has the terminations for RF and monitoring and is shaped for the surgeon to manipulate during placement and withdrawal. Two or more bipolar electrodes on the patient end are placed so each electrode is spaced from another with each circumscribing the catheter. A mucosa or thrombus sensor responsive to applied RF energy passing between the two or more bipolar electrodes determines the condition of the transmural formation of a lesion or the thrombus between each of the electrodes. The sensor is a temperature sensor positioned in the space between the electrodes measures the change in mucosal layer temperature or the thrombus during the application of RF energy. An RF generator electrically coupled to the electrodes and the sensor is alternately a phase detector in circuit with the coupling determines reactance of tissue as an indicator of lag or lead of the voltage wave form or current wave form delivered or is an impedance responsive circuit positioned in the RF generator to determine voltage and current delivered so a calculator finds impedance delivered for finding initial electrode contact with the tissue and for measuring the change in mucosal layer. The temperature sensor connects to an RF generator with control circuitry regulating delivery to a temperature range. A method for sterilization has the steps of inserting a catheter, delivering RF and monitoring the effect on the mucosa or thrombus, circumscribing the catheter with two or more bipolar electrodes, each of the electrodes spaced from one another and passing RF energy therebetween.

公开(公告)号：DE19706751A1

公开(公告)日：1997-10-02

申请号：DE19706751

申请日：1997-02-20

Applicant: VALLEYLAB INC

Inventor： CABAK JAMES ,  CLASEMAN BRYAN A ,  LAMBRECHT GREGORY H ,  WHITT JASON ,  MAKOWER JOSHUA

IPC: A61B18/14 ,  A61M1/00 ,  A61B17/39 ,  A61B1/015

公开(公告)号：CA2200029A1

公开(公告)日：1997-09-27

申请号：CA2200029

申请日：1997-03-14

Applicant: VALLEYLAB INC

Inventor： CABAK JAMES ,  CLASEMAN BRYAN A ,  LAMBRECHT GREGORY H ,  WHITT JASON ,  MAKOWER JOSHUA

IPC: A61B18/14 ,  A61M1/00 ,  A61B17/36 ,  A61B17/32

Abstract: An apparatus and method is disclosed to resect and remove tissue. The apparatus is particularly suited for operation on the prostate for treatment of Benign Prostatic Hyperplasia (BPH). The apparatus has a deflectable member (18),which may be a wire, and which conducts electrosurgical current. The deflectable member (18) protrudes from an opening (22) near the distal end (13) of a hollow tube. Tissue is cut and coagulated by the deflectable member (18) asthe apparatus is rotated. A sharp tip on the distal end (13) of the tube allows the apparatus to be inserted percutaneously. Suction and irrigation are integral to the apparatus. One advantage of the apparatus is that tissue samples can be recovered for pathological analysis. Other advantages are that operations on theprostate can be conducted with minimal blood loss, concerns about TUR syndrome are reduced, and the bladder neck and urethra can be spared. Use of this device on the prostate also can eliminate the need for a post-operative catheter and provides immediate post-operative relief.