Apparatus for treating chondromalacia

• US 6,068,628 A
• Filed: 08/20/1996
• Issued: 05/30/2000
• Est. Priority Date: 08/20/1996
• Status: Expired due to Fees

• Current Assignee: Oratec Interventions Incorporated (Smith & Nephew PLC)
• Original Assignee: Oratec Interventions Incorporated (Smith & Nephew PLC)
• Inventors: Fanton, Gary, Sharkey, Hugh
• Primary Examiner(s): Dvorak, Linda C. M.
• Assistant Examiner(s): YARNELL, BRYAN KEITH
• Application Number:
  US08/700,196
• Time in Patent Office: 1,379 Days
• Field of Search: 606/32-34, 606/39-42, 606/45-52, 607/98, 607/99, 607/108, 607/113, 607/97, 607/100, 607/101, 600/372, 600/382-384, 604/114
• US Class Current: 606/41
• CPC Class Codes: A61B 17/320016 Endoscopic cutting instruments, e.g. arthroscopes, resectoscopes A61B10/0233, A61B17/29, A61B17/3207 take precedence
• CPC Class Codes: A61B 17/3203 Fluid jet cutting instruments
• CPC Class Codes: A61B 18/1442 Probes having pivoting end effectors, e.g. forceps
• CPC Class Codes: A61B 18/148 having a short, rigid shaft for accessing the inner body transcutaneously, e.g. for neurosurgery or arthroscopy
• CPC Class Codes: A61B 2017/320078 Tissue manipulating surface
• CPC Class Codes: A61B 2018/126 bipolar
• CPC Class Codes: A61N 1/403 for thermotherapy, e.g. hyperthermia
• CPC Class Codes: A61N 7/02 Localised ultrasound hyperthermia hyperthermia in general A61F7/00

Abstract

A thermal energy delivery apparatus has a probe including a distal end and a proximal end. A first electrode is positioned at the distal end of the probe such that the electrode is positioned on a recessed longitudinal portion of the probe. The first electrode is configured to deliver sufficient thermal energy to a fibrillated cartilage surface to reduce a level of fibrillation of the fibrillated cartilage surface. A cabling is coupled to the proximal end of the probe.

Claims

1. A thermal energy delivery apparatus comprising:

a distal portion having longitudinal surfaces extending distally to a distal end, a portion of the longitudinal surfaces including a recessed portion such that the recessed portion is positionable adjacent a fibrillated cartilage joint surface; and

a electrode positioned within the recessed portion at a first depth which when the recessed portion is positioned adjacent fibrillated cartilage tissue of a joint surface is (a) less than a depth where fibrils extending from the fibrillated cartilage tissue would not be able to contact the electrode, and (b) greater than a depth where the electrode would contact the cartilage tissue underlying the fibrils.

2. The apparatus of claim 1, further comprising a cabling coupled to the proximal end of the apparatus.

3. The apparatus of claim 1, further comprising a second electrode positioned on the apparatus such that the first electrode delivers energy through the fibrils adjacent the first electrode to the second electrode.

4. The apparatus of claim 3, wherein the first electrode and the second electrode are positioned on opposite sides of the apparatus to minimize damage to the cartilage tissue underlying the fibrils.

5. The apparatus of claim 1, wherein the apparatus is a bipolar device.

6. The apparatus of claim 1, wherein the apparatus is a monopolar device.

7. The apparatus of claim 1, further comprising a sensor positioned at the distal end of the probe.

8. The apparatus of claim 1, further comprising a thermal energy source coupled to the first electrode.

9. The apparatus of claim 8, further comprising:

a sensor positioned at the distal end of the apparatus;

a comparator configured for comparing a measured temperature value at the sensor with a predetermined temperature value and generating a disabling signal if the measured temperature value exceeds the predetermined maximum temperature value; and

a communication means for communicating the disabling signal to the thermal energy source to cease further delivery of energy from the thermal energy source to the first electrode.

10. The apparatus of claim 1, wherein the thermal energy source is selected from the group consisting of RF, microwave, resistive heating, ultrasound, coherent light, incoherent light and liquid thermal jet.

11. The apparatus of claim 1, wherein the distal end of the apparatus is sized to contract a joint.

12. The apparatus of claim 11, wherein the distal end of the apparatus is sized to contract an articulated joint.