Microminiaturized minimally invasive intravascular micro-mechanical systems powered and controlled via fiber-optic cable

• US 5,722,989 A
• Filed: 03/06/1997
• Issued: 03/03/1998
• Est. Priority Date: 05/22/1995
• Status: Expired due to Fees

• Current Assignee: Regents of the University of California (University of California)
• Original Assignee: Regents of the University of California (University of California)
• Inventors: Krulevitch, Peter A., Clough, Robert, Hagans, Karla, Lee, Abraham P., Da Silva, Luiz, Benett, William J., Matthews, Dennis L., Fitch, Joseph P., Celliers, Peter M.
• Primary Examiner(s): Buiz, Michael
• Assistant Examiner(s): Shai, Daphna
• Application Number:
  US08/812,142
• Time in Patent Office: 362 Days
• Field of Search: 606/159, 606/205, 606/206, 606/207, 606/208, 606/211, 606/210, 294/100, 294/86.4
• US Class Current: 606/205
• CPC Class Codes: A61B 17/12022 Occluding by internal devices, e.g. balloons or releasable wires plugging an opening in the wall of an organ A61B17/0057; occluders for the cervical canal A61F6/146; vas deferens occluders A61F6/20
• CPC Class Codes: A61B 17/1214 Coils or wires
• CPC Class Codes: A61B 17/29 Forceps for use in minimally invasive surgery
• CPC Class Codes: A61B 2017/00292 mounted on or guided by flexible, e.g. catheter-like, means
• CPC Class Codes: A61B 2017/00345 Micromachines, nanomachines, microsystems
• CPC Class Codes: A61B 2017/00398 using powered actuators, e.g. stepper motors, solenoids
• CPC Class Codes: A61B 2017/1205 Introduction devices
• CPC Class Codes: A61B 2017/12068 detachable by heat
• CPC Class Codes: A61B 2017/12077 Joint changing shape upon application of heat, e.g. bi-metal or reversible thermal memory
• CPC Class Codes: A61B 2017/12081 detachable by inflation
• CPC Class Codes: A61B 2017/2926 Details of heads or jaws

Abstract

A micro-mechanical system for medical procedures is constructed in the basic form of a catheter having a distal end for insertion into and manipulation within a body and a near end providing for a user to control the manipulation of the distal end within the body. A fiberoptic cable is disposed within the catheter and having a distal end proximate to the distal end of the catheter and a near end for external coupling of laser light energy. A microgripper is attached to the distal end of the catheter and providing for the gripping or releasing of an object within the body. A laser-light-to-mechanical-power converter is connected to receive laser light from the distal end of the fiberoptic cable and connected to mechanically actuate the microgripper.

Claims

1. A micro-mechanical system, comprising:

a catheter having a distal end for insertion into and manipulation within a body and a near end providing for a user to control said manipulation of said distal end within said body;

a fiberoptic cable disposed within the catheter and having a distal end proximate to said distal end of the catheter and a near end for external coupling of-laser light energy;

a microgripper attached to said distal end of the catheter and providing for the gripping or releasing of an object within said body; and

a laser-light-to-mechanical-power converter connected to receive laser light from said distal end of the fiberoptic cable and connected to mechanically actuate the microgripper.

2. The micro-mechanical system of claim 1, further comprising:

an electronic sensor connected to receive electrical power from said distal end of the fiberoptic cable and connected to provide signal information about a particular physical environment in which the microgripper is located and externally communicated through the fiberoptic cable to a user.

3. The micro-mechanical system of claim 2 wherein:

the sensor detects at least one of gap distance, pH, chemistry, position, acceleration, pressure, temperature, ambient light, ambient sound, and video image.

4. The micro-mechanical system of claim 1, further comprising:

a mechanical sensor attached to said distal end of the fiberoptic cable and connected to provide light signal information about a particular physical environment in which the microgripper is located and externally communicated through the fiberoptic cable to a user.

5. The micro-mechanical system of claim 4 wherein:

the sensor detects at least one of gap distance, pH, chemistry, position, acceleration, pressure, temperature, ambient light, ambient sound, and video image.

6. The micro-mechanical system of claim 1, wherein:

the laser-light-to-mechanical-power converter includes a photo-voltaic cell that generates electrical power in response to laser light received by the fiberoptic cable and further includes an electromechanical motor mechanically connected to actuate the microgripper.

7. The micro-mechanical system of claim 1, wherein:

the laser-light-to-mechanical-power converter includes a heat-sensitive photo-thermal material mechanically connected to actuate the microgripper in response to laser light received by the fiberoptic cable at said near end and conducted to said distal end.

8. The micro-mechanical system of claim 1, wherein:

the laser-light-to-mechanical-power converter includes a capacitor electrically connected to discharge into an electromechanical motor in response to laser light received by the fiberoptic cable at said near end and conducted to said distal end, and wherein, said electromechanical motor is mechanically connected to actuate the microgripper.