Laser skin perforator

• US 5,554,153 A
• Filed: 08/29/1994
• Issued: 09/10/1996
• Est. Priority Date: 08/29/1994
• Status: Expired due to Fees

• Current Assignee: Cell Robotics Incorporated
• Original Assignee: Cell Robotics Incorporated
• Inventors: Parkhurst, Warren E., Kokhanovsky, Sergey A., Polushkin, Valeri G., Costello, David J., Dergatchev, Aleksei Y.
• Primary Examiner(s): Thaler, Michael H.
• Assistant Examiner(s): HARRIS, SONYA C
• Application Number:
  US08/297,295
• Time in Patent Office: 743 Days
• Field of Search: 606/9, 606/10, 606/11, 606/13, 606/16, 606/15, 606/17, 606/18, 433/29, 385/31
• US Class Current: 606/9
• CPC Class Codes: A61B 18/20 using laser
• CPC Class Codes: A61B 2017/00765 Decreasing the barrier function of skin tissue by radiated energy, e.g. using ultrasound, using laser for skin perforation
• CPC Class Codes: A61B 5/1411 by percutaneous method, e.g. by lancet
• CPC Class Codes: A61B 5/150022 for capillary blood or interstitial fluid
• CPC Class Codes: A61B 5/15134 Bladeless capillary blood sampling devices, i.e. devices for perforating the skin in order to obtain a blood sample but not using a blade, needle, canula, or lancet, e.g. by laser perforation, suction or pressurized fluids
• CPC Class Codes: A61B 5/15136 by use of radiation, e.g. laser

Abstract

A laser perforator is disclosed for perforating skin with a perforation to permit blood under a surface of the skin to flow out, the perforator in one embodiment having a laser light source for producing an output laser beam, and a mode distribution means for intercepting the output laser beam to control distribution of laser energy of the output laser beam across the perforation of the skin. A laser perforator is disclosed for perforating skin with a perforation to permit blood under a surface of the skin to flow out, the perforator in one embodiment having a laser light source for producing an output laser beam having an energy level between about 0.1 to about 2.0 Joules, and a mode distribution means for controlling mode distribution of the output laser beam across the perforation of the skin, the mode distribution means including a cylindrical laser rod to produce ring mode distribution of the output laser beam, the cylindrical laser rod having a 90 degree annular corner reflector to produce a ring mode distribution of the output laser beam, a doughnut lens for focusing the output laser beam, the perforation ranging in diameter between about 0.1 to about 2.0 millimeters, in depth between about 0.5 to about 4.0 millimeters, and ranging in width between about 0.05 to about 0.2 millimeters. A method is also disclosed for perforating skin for blood sampling, the method including producing a laser beam from a laser, the beam having an energy level and a plurality of energy modes, distributing the energy modes of the beam by mode distribution means for evenly distributing the energy modes, producing an output beam with an evenly distributed mode distribution, and directing the output beam to the skin and producing a perforation through the skin through which the blood flows. A laser perforator is disclosed for perforating skin with a perforation to permit blood under a surface of the skin to flow out, the perforator having a laser light source for producing an output laser beam, and a mode distribution means for producing a ring shaped profile of the output laser beam.

Claims

1. A laser perforator for perforating skin with a perforation to permit blood under a surface of the skin to flow out, the perforator comprising

a laser light source for producing an output laser beam, and

a mode distribution means for intercepting the output laser beam to control distribution of laser energy of the output laser beam across the perforation of the skin the mode distribution means is a cylindrical rod having a 90 degree annular corner reflector having a conical surface with an apex diametrically opposed to the cone so that the conical surface forms a circular reflective surface at the end of said means.

2. The laser perforator of claim 1 further comprising,

the mode distribution means for producing ring mode distribution of an output laser beam.

3. The laser perforator of claim 2 further comprising a doughnut lens for focusing the output laser beam.

4. The laser perforator of claim 1 wherein the energy level of the output laser beam ranges between about 0.1 to about 2.0 Joules incident on the skin.

5. The laser perforator of claim 1 wherein the perforation ranges in diameter between about 0.1 to about 2.0 millimeters and the perforation ranges in depth between about 0.5 to about 4.0 millimeters.

6. The laser perforator of claim 2 wherein the ring has a diameter ranging between about 0.1 to about 2.0 millimeters and a slit perforation is produced ranging in depth between about 0.5 to about 4.0 millimeters and ranging in width between about 0.05 to about 0.2 millimeters.

7. The laser perforator of claim 1 wherein the output laser beam has an energy level of about 1.0 Joules.

8. The laser perforator of claim 7 wherein the output laser beam is pulsed at between 50 and 500 microseconds.

9. A laser perforator for perforating skin with a perforation to permit blood under a surface of the skin to flow out, the perforator comprising

a laser light source for producing an output laser beam having an energy level between about 0.1 to about 2.0 Joules, and

a mode distribution means for controlling mode distribution of the output laser beam across the perforation of the skin, the mode distribution means including a cylindrical laser rod to produce ring mode distribution of the output laser beam, the cylindrical laser rod having a 90 degree annular corner reflector having a conical surface with an apex diametrically opposed to the cone so that the conical surface forms a circular reflective surface at the end of said means to produce a ring mode distribution of the output laser beam,

a doughnut lens for focusing the output laser beam,

the perforation ranging in diameter between about 0.1 to about 2.0 millimeters, in depth between about 0.5 to about 4.0 millimeters, and ranging in width between about 0.05 to about 0.2 millimeters.