STEVEN CHARLES
Medical Practice at Poplar Ave, Memphis, TN
License number
Alaska MEDS2727
Issued Date
Oct 31, 1991
Effective Date
Nov 16, 2006
Expiration Date
Dec 31, 2008
Category
Medical
Address
Address
6401 Poplar Ave SUITE 190, Memphis, TN 38119
Professional information
Variable Drive Vitrectomy Cutter
US Patent:
8298253, Oct 30, 2012
Filed:
May 27, 2010
Appl. No.:
12/788645
Inventors:
Steven T. Charles - Memphis TN, US
Assignee:
Alcon Research, Ltd. - Fort Worth TX
International Classification:
A61B 17/32, A61B 17/20
US Classification:
606171, 604 22
Abstract:
A vitrectomy probe having a variable duty cycle cutting mechanism is disclosed. The probe includes a motor and a cam driver rotationally driven by the motor. The cam driver has a non-planar driver surface having surface features that vary at different radii. A follower mechanism is arranged to selectively interface with the driver surface at different radii on the driver surface in a manner to selectively interface with the varied surface features at the different radii. The follower is arranged to transfer rotational movement of the cam driver into linear movement of the follower mechanism.
Force Sensitive Foot Controller
US Patent:
2009000, Jan 1, 2009
Filed:
Jun 26, 2007
Appl. No.:
11/768568
Inventors:
Steven T. Charles - Memphis TN, US
International Classification:
A61B 19/00
US Classification:
606130
Abstract:
A microsurgical system, and a foot controller for the improved operation of a microsurgical system, are disclosed. A surgeon may use the foot controller to proportionally control a surgical parameter based upon the amount of force applied to a pressure plate of the foot controller.
Spiral Scanner With Electronic Control
US Patent:
6626834, Sep 30, 2003
Filed:
Jan 25, 2001
Appl. No.:
09/768821
Inventors:
Shane Dunne - Kingston K7M 2W2, CA
Steven Charles - Germantown TN 38138
Steven Charles - Germantown TN 38138
International Classification:
A61B 800
US Classification:
600444, 244 316
Abstract:
A scanning device, typically ultrasonic, can make a volumetric scan of a conical scanning field. A transducer having a permanent magnet at its back end is gimbal mounted in a housing. Behind the permanent magnet is a hemispheric electromagnet coil assembly having at least two wound electromagnet coils. The coils are energized in turn with an alternating current signal, with the signal applied to any coil being out of phase with the signal applied to any other coil by 180°/n, where n is the number of coils in the hemispheric electromagnet coil assembly. Volumetric scanning is possible by periodically modulating the magnitude or frequency of the signals applied to the coils.
Master-Slave Micromanipulator Method
US Patent:
6000297, Dec 14, 1999
Filed:
Apr 28, 1999
Appl. No.:
9/301063
Inventors:
Alan K. Morimoto - Albuquerque NM
David M. Kozlowski - Albuquerque NM
Steven T. Charles - Germantown TN
James A. Spalding - Springfield KY
David M. Kozlowski - Albuquerque NM
Steven T. Charles - Germantown TN
James A. Spalding - Springfield KY
Assignee:
Sandia Corporation - Albuquerque NM
International Classification:
B25J 300
US Classification:
7447901
Abstract:
A method based on precision X-Y stages that are stacked. Attached to arms projecting from each X-Y stage are a set of two axis gimbals. Attached to the gimbals is a rod, which provides motion along the axis of the rod and rotation around its axis. A dual-planar apparatus that provides six degrees of freedom of motion precise to within microns of motion. Precision linear stages along with precision linear motors, encoders, and controls provide a robotics system. The motors can be remotized by incorporating a set of bellows on the motors and can be connected through a computer controller that will allow one to be a master and the other one to be a slave. Position information from the master can be used to control the slave. Forces of interaction of the slave with its environment can be reflected back to the motor control of the master to provide a sense of force sensed by the slave. Forces import onto the master by the operator can be fed back into the control of the slave to reduce the forces required to move it.
Docking Station With Temperature Control And Electronic Identification System
US Patent:
2011015, Jun 23, 2011
Filed:
Dec 17, 2009
Appl. No.:
12/640427
Inventors:
Steven T. Charles - Memphis TN, US
International Classification:
A61B 17/00, A61B 19/00, F27D 21/00
US Classification:
606 1, 206370, 432 32
Abstract:
Disclosed is an exemplary surgical system employing a temperature controlled docking station. The surgical system may include an articulating arm that is selectively moveable within a range of positions. A tray for receiving items used in performing a procedure may be attached to the articulating arm. The docking station may be attached to the tray. The docking station may include a heating element for selectively heating the docking station, a temperature sensor for monitoring a temperature of the docking station, and a reader configured for collecting information associated with an article placed in the docking station. The surgical system may also include a controller operably connected to the heating element, the temperature sensor, and the reader. The controller may be configured to adjust a heat output of the heating element in response to a signal received from the temperature sensor and/or the reader.
Devices, Systems, And Methods For Pupil Expansion
US Patent:
2013026, Oct 10, 2013
Filed:
Apr 4, 2012
Appl. No.:
13/438881
Inventors:
Glenn R. Sussman - Laguna Niguel CA, US
Steven T. Charles - Memphis TN, US
Hsin S. Chin - Irvine CA, US
Steven T. Charles - Memphis TN, US
Hsin S. Chin - Irvine CA, US
International Classification:
A61M 29/00
US Classification:
606198
Abstract:
A pupil expander is disclosed. The pupil expander comprises a support member sized to expand a pupil and a plurality of engaging portions. The plurality of engaging portions are coupled to and spaced about the support member. The engaging portions have a recess and are shaped and sized to receive an inner margin of an iris.
Ambient Light Sensor To Adjust Display Brightness
US Patent:
2008029, Nov 27, 2008
Filed:
May 25, 2007
Appl. No.:
11/753995
Inventors:
Steven T. Charles - Memphis TN, US
International Classification:
G08B 21/00
US Classification:
340540
Abstract:
A system for automatically adjusting the display intensity and/or illumination of surgical console controls and indicators. The invention includes a light sensor to detect the level of ambient light as well as a microprocessor with settings for ambient light threshold level and dimming amount.
Infusion Pressure Control Using Blood Pressure
US Patent:
2011028, Nov 24, 2011
Filed:
May 20, 2011
Appl. No.:
13/112504
Inventors:
Steven T. Charles - Memphis TN, US
International Classification:
A61F 9/008
US Classification:
604 66, 604505
Abstract:
Methods, systems, and software for controlling infusion pressure, such as during a medical procedure, using systemic blood pressure are described. Systemic blood pressure, such as brachial arm blood pressure or radial artery blood pressure, may be used to estimate central retinal artery blood pressure to estimate critical closing pressure. Further, the disclosure relates to controlling infusion pressure to prevent an increase in intraocular pressure above the estimated critical closing pressure when such is not desired, and, when such is desired, using systemic blood pressure and infusion pressure to control an intentional increase in intraocular pressure above the estimated critical closing pressure to stop intraocular bleeding.
Viscous Fluid Extraction
US Patent:
8251980, Aug 28, 2012
Filed:
Mar 30, 2010
Appl. No.:
12/749842
Inventors:
Michael A. Zica - Costa Mesa CA, US
Matthew E. Bazydlo - Costa Mesa CA, US
Steven T. Charles - Memphis TN, US
Matthew E. Bazydlo - Costa Mesa CA, US
Steven T. Charles - Memphis TN, US
Assignee:
Alcon Research, Ltd. - Fort Worth TX
International Classification:
A61M 27/00
US Classification:
604541, 604319, 604 19, 604521, 604 35, 604 28
Abstract:
An extraction sleeve assembly for use in extracting a viscous fluid from the posterior segment of an eye during vitreoretinal surgery is disclosed. The extraction sleeve assembly includes a luer lock fitting and a flexible, tubular extraction sleeve. The extraction sleeve assembly facilitates a shorter extraction time for the viscous fluid.
Trocar Cannula
US Patent:
2008009, Apr 24, 2008
Filed:
Sep 19, 2006
Appl. No.:
11/523765
Inventors:
Steven T. Charles - Memphis TN, US
International Classification:
A61M 5/00
US Classification:
604264
Abstract:
A trocar cannula having a tube and a hub. The hub is attached to the proximal end of the tube so that the tube may be inserted into an incision. The proximal side of the hub is rounded, curved or slanted so as to minimize contact with the tissue surrounding the incision.