SYSTEM AND DEVICE FOR MULTI SPOT PHOTOCOAGULATION

Abstract

A photocoagulation system is described herein that facilitates multi-spot laser treatment procedures inside the eye and close to the patient's retina. In one example embodiment, a modified endocular probe operates with a laser system to move the probe or a probe needle so as to project a multi-spot pattern on a patient's retina by controlling the rotation movement of the needle (and needle tip). In addition, the system facilitates maneuverability and angular deviation of the needle tip and synchronizes these different movements with the laser photocoagulator system so as to project the aiming beam and thereafter the laser treatment beam in the desired pattern location with the desired exposure time and power.

Claims

1. A photocoagulation system including a system controller and a laser source for generating an aiming beam and a treatment beam, the system comprising: a probe having a distal end and a proximal end, the proximal end being coupled to a fiber optic cable that is coupled to the laser source, the distal end of the probe configured for ophthalmologic procedures and configured to have a longitudinal portion and an angled tip at the end of the longitudinal portion; wherein the distal end of the probe is configured to angularly rotate thereby forming at least one circle with spots located thereon that form alignment pattern and/or a treatment pattern of spots.

2. The system according to claim 1, wherein the probe tip is comprised of a needle tip that includes a configurable directional angle that is either fixed or variable.

3. The system of claim 2, wherein the distal end of the probe is configured to form a plurality of concentric circles with a plurality of spots, thereby forming the desired alignment and treatment pattern.

4. The system of claim 3, further comprising a probe holder adapted to hold the probe and configured to operatively communicate with the system controller.

5. The system of claim 4, wherein the probe holder further comprises: a motor for longitudinal displacement of the probe; a probe displacement sensor; and a control circuit member operatively coupled to the displacement motor and the displacement sensor and adapted to communicate with the system controller; wherein the displacement motor is adapted to engage an actuator operatively coupled to the probe and configured to control longitudinal displacement of the probe, and wherein the displacement sensor is adapted to sense a displacement member located on the probe and configured to communicate displacement movement of the probe.

6. The system of claim 4, wherein the probe holder further comprises: a motor for angular rotation of the probe; a probe angular rotation sensor; and a control circuit member operatively coupled to the angular rotation motor and the angular rotation sensor and adapted to communicate with the system controller; wherein the angular rotation motor is adapted to engage an actuator operatively coupled to the probe and configured to control angular rotation or displacement of the probe, and wherein the angular rotation sensor is adapted to sense an angular rotation member located on the probe and configured to communicate angular rotation movement of the probe.

7. The system of claim 5, wherein the probe includes a needle and needle tip, the needle and needle tip being responsive to at least one of the actuator, the displacement motor and the angular rotation motor.

8. The system of claim 4, wherein the aiming beam is generated inside the probe holder.

9. The system of claims 5, wherein the displacement motor and the angular motor are configured from mechanical components and springs that provide similar displacement and rotational movement of the probe.

10. The system according to claim 3, wherein the probe includes an optical element at the distal end tip to deviate a laser beam on a side with an angle.

11. The system according to claim 3, wherein the probe includes a specific cut or shape at the distal end tip to deviate the laser beam on the side with an angle.

12. The system according to claim 3, wherein the optical probe includes a focusing element or a ball lens at the distal end tip.

13. The system according to claim 3, wherein the probe includes at least one of a fiber with illumination, a fiber with a tapered end and a fiber with a coated or treated or shaped end.

14. The system according to claim 3, wherein the optical probe includes multiple optical fibers arranged in a geometric relationship at the end of the probe tip.

15. The system according to claim 1, wherein the probe includes at the distal end tip an optical element that includes a diffractive optic that divides the alignment and/or treatment beam into multiple beams.

16. An endocular probe holder assembly comprising: a housing; a motor for longitudinal displacement of an endocular probe; a probe displacement sensor; and a control circuit member operatively coupled to the displacement motor and the displacement sensor and adapted to control the motor and the sensor; wherein the displacement motor is adapted to engage an actuator operatively coupled to the probe and configured to control angle displacement of the probe through a longitudinal movement, and wherein the displacement sensor is adapted to sense a displacement member located on the probe and configured to communicate angle displacement movement of the probe or probe tip to the control circuit member.

17. The probe holder assembly of claim 16, wherein the probe holder further comprises: a motor for angular rotation of the probe; a probe angular rotation sensor; and a control circuit member operatively coupled to the angular rotation motor and the angular rotation sensor and adapted to control the angular motor and angular sensor; wherein the angular rotation motor is adapted to engage an actuator operatively coupled to the probe and configured to control angular rotation or displacement of the probe, and wherein the angular rotation sensor is adapted to sense an angular rotation member located on the probe and configured to communicate angular rotation movement of the probe to the control circuit member.

18. The probe holder assembly of claim 16, wherein the probe includes a needle and needle tip, the needle and needle tip being responsive to at least one of the actuator, the displacement motor and the angular rotation motor.

19. The system of claims 6, wherein the displacement motor and the angular motor are configured from mechanical components and springs that provide similar displacement and rotational movement of the probe.

20. The probe holder assembly of claim 17, wherein the probe includes a needle and needle tip, the needle and needle tip being responsive to at least one of the actuator, the displacement motor and the angular rotation motor.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Other important objects and advantages of the present invention will be apparent from the following detailed description of the invention taken in connection with the accompanying drawings in which;

[0017] FIG. 1 is a multispot surgical laser system in accordance with the invention;

[0018] FIGS. 2A-2G are various alignment and treatment patterns configurable by the various systems disclosed herein;

[0019] FIG. 3 illustrate probe handle holder in accordance with the invention;

[0020] FIG. 4 illustrate probe handle holder with an endocular probe inserted in accordance with the invention;

[0021] FIGS. 5A-5B illustrate endocular probes which can fit inside the probe holder in accordance with the invention; and

[0022] FIG. 6 is another multispot surgical laser system in accordance with the invention.

DETAILED DESCRIPTION OF THE INVENTION

[0023] Following below are more detailed descriptions of various related concepts related to, and embodiments of, methods and apparatus according to the present disclosure for an improved diagnostic and treatment system that speeds up eye treatment time while improving accuracy and reliability of the selected treatment by the physician. It should be appreciated that various aspects of the subject matter introduced above and discussed in greater detail below may be implemented in any of numerous ways, as the subject matter is not limited to any particular manner of implementation. Examples of particular implementations and applications are provided primarily for illustrative purposes.

[0024] Referring now to the Figures, FIG. 1 is a multispot surgical laser system 10 in accordance with the invention. System 10 includes laser photocoagulator 20 coupled to a footswitch 30, which controls at firing mode and a slit lamp (among other items associated with the photocoagulator), and having an electrical cord or cable 21 to power the system and in some embodiments to use for control or communication as well. Photocoagulator 20 includes a screen or display 22 to permit the user or physician to choose a desired alignment and/or treatment pattern and to control all the other treatment parameters such as, but not limited to, the power of the treatment beam and exposure time. An optical fiber 24 is operatively coupled to photocoagulator 20 on one end and to a handheld member or holder 40 on the other end. In this example embodiment, fiber 24 is operatively coupled to an endocular probe 50, which may be housed within probe holder 40, which has a needle 52 and needle tip 52A coupled thereto. In this example embodiment, needle tip 52 projects therefrom an alignment pattern 60 (and when actuated a treatment pattern that overlays the alignment pattern) on a patient's retina. The patterns that are configurable and generated by this system are discussed herein.

[0025] Referring now to FIGS. 2A-2G are various alignment and treatment patterns configurable by system 10 and various other laser systems disclosed herein. Examples of possible patterns that can be generated from the systems taught herein include (of different sizes) a square, a circle, rectangle, a line, a define sector or area filled in with several spots by doing one or several turns of a particular modified endocular fiber 24 or needle 52 inside handle piece holder 40. This is accomplished by synchronization between laser 20 and endocular fiber needle 52 resulting in turning or rotating needle tip 52A as well as creating an angle deviation at the needle tip (thereby projecting movement at the needle tip). The spot diameter on the retina will vary with the distance between endocular fiber tip and target tissue. FIG. 2A illustrates a single spot generated with a standard endocular fiber. FIG. 2B illustrates, on the other hand, a four spot pattern (small square) generated with system 10 and probe 50, with one turn (or rotation) of a coupled or connected fixed angle endocular probe or, alternatively, a particular endocular probe with tip angle that is adjustable. FIG. 2C illustrates an example of a circular pattern with 10 spots generated with about one turn of a coupled fixed angle endocular probe or a coupled endocular probe with an adjustable tip angle.

[0026] In FIG. 2D there is illustrated an example of a 12 spot pattern generated with about two turns or rotations of a coupled endocular probe with an adjustable tip angle. FIG. 2E illustrates an example of a 16 spot pattern (resulting in a 44 square pattern) generated with about three turns of a coupled endocular probe with an adjustable tip angle. FIG. 2F illustrates yet another example of a 10 spot sector pattern, similar to an arc pattern, generated with about three turns of a coupled endocular probe with an adjustable tip angle. FIG. 2G illustrates yet another example of an 8 spot rectangular pattern generated with about two turns of a coupled endocular probe with an adjustable tip angle. Hence, it is apparent to one skilled in the art that numerous patterns and sector filling schemes are possible with the laser system taught herein.

[0027] Referring now to FIGS. 3 and 4, there is illustrated an example embodiment of probe handle holder 40 that includes a probe housing 40A and a probe cylindrical opening 40B that spans along a length of housing 40A, opening 40B configured to accept an endocular probe 50, with an optical fiber 51 being coupled to probe 50. Probe housing 40A includes therein a motor 41 adapted to drive an angle of probe or the tip of needle 52 and includes a sensor 45 adapted to check the angle of probe 50 or the angle of needle tip 52A indirectly. In this example embodiment, probe housing 40A further includes a motor 42 to rotate needle 52 or probe 50 (depending on the desired embodiment) and a sensor 43 to check the angle of rotation of the probe or needle. Housing 40A also includes a circuit board 44 which includes circuitry and processors that control the various motors in the probe housing to generate the desired probe position (angular rotation and/or displacement) or needle tip angle position 52A. In a related embodiment, board 44 is configured to communicate with a photocoagulator system controller. An electrical cord or cable 48 is coupled to housing 40 on one end and is operatively coupled to laser 20 at the other end and establishes synchronization for movement of the probe tip position angularly and rotationally. In this example embodiment, the longitudinal movement controls how much angle there will be in needle tip 52A. Changing the needle tip 52A angle corresponds directly to the size of the circle to be made within the retina to assist in forming the various aiming beam patterns. In a related embodiment, the probe holder and motors control the longitudinal movement or displacement (or in/out of the holder) of the probe and needle.

[0028] Referring now to FIGS. 5A-5B are two example embodiments of endocular probes 50 in accordance with the invention. In FIG. 5A, probe 50 is coupled to fiber 51, while fiber 51 is optically and/or electrically coupled to laser 20. A button actuator 54 is included that is operatively coupled to probe 50 so as to facilitate one or more of the following: mechanical push/pull or movement/translation longitudinally along probe housing 40A length (in and out of housing 40A) and within cylinder 40B; with rotational movement capability to permit movement of the probe body or of needle tip 52 in various angles 52A of the endocular probe. Button or actuator 54 can also be configured to allow device sensor 43 to verify or determine endocular probe tip angle 52A. Displacement member 56 located on probe 50 is configured to permit the device sensor 43 to determine each of the endocular probe and needle position in terms of angular rotation. Angular rotation member 58 located on probe 50 is configured to (mechanically or otherwise) fix or hold the probe holder so as to permit angular turning or rotating of the probe 50 or needle 52. The inset figures illustrate movement of (in various angles) needle tip 52 in response to actuator 54.

[0029] Referring now FIG. 6, there provided another multispot surgical laser 100 system with some similar elements as in system 10 except those elements are adapted to provide slit lamp type ophthalmology treatments as taught herein. In this example embodiment, electrical cord 121 and optic fiber 124 are coupled to laser source 20 with the other end of fiber tip 124A coupled to a device so as to permit translational/deviation movement as well as rotation of the tip using motors (not shown) and position sensors. Such device is then coupled to a fixed spot size changer 126 which is also coupled to a focus lens 128. A patient's eye 180 is diagnosed and treated by a user 182 using a slit lamp 170 which is able to control a mirror with a micromanipulator 172 that reflects light from tip 124A through a contact lens 174 to the patient's eye 180. Modifications known to one skilled in the art can be made to system 100 so as to project and treat several various patterns on the patient's eye, including the retina and cornea. The patterns illustrated in FIG. 2A-2G, which are generated by systems 10 and 100, are displayable to the user in display 22 to ensure the correct treatment pattern is being used otherwise adjustments can be made.

[0030] The aforementioned teachings are also applicable to slip lamp systems where alignment and treatment patterns can be formed by rotational and translational movement of the fiber without the use of a scanner which deviates or moves the laser beam as opposed to the fiber or probe as described herein. In addition, where zoom is not needed for adjusting spot size we can use only one fixed spot size or several fixed spot sizes and form standard patterns using this invention to fill in a sector or area to be treated.

[0031] The following patents and publications that relate to ophthalmology diagnostic and treatment systems are herein incorporated by reference in their entirety and constitute part of the disclosure herein: U.S. Patent and Publication Nos. U.S. Pat. No. 6,096,028; U.S. Pat. No. 8,496,331; U.S. 2011/0144627; and WO 2008/024848 A2.

[0032] The foregoing particular embodiments of the invention as set forth herein are for illustrative purposes only. Various deviations and modifications may be made within the spirit and scope of the invention without departing from the main theme thereof.