Selectable instruments with homing devices for haptic virtual reality medical simulation

• US 6,113,395 A
• Filed: 08/18/1998
• Issued: 09/05/2000
• Est. Priority Date: 08/18/1998
• Status: Expired due to Fees

• Current Assignee: David C. Hon
• Original Assignee: David C. Hon
• Inventors: Hon, David C.
• Primary Examiner(s): Nguyen, Kien T.
• Assistant Examiner(s): Rovnak, John Edmund
• Application Number:
  US09/136,441
• Time in Patent Office: 749 Days
• Field of Search: 434/262, 434/267, 434/268, 434/270, 434/271, 434/272, 434/273, 434/274, 434/275
• US Class Current: 434/262
• CPC Class Codes: G09B 23/28 for medicine

Abstract

Invention is apparatus for using selectable instruments in virtual medical simulations with input devices actuated by user and resembling medical instruments which transmit various identifying data to the virtual computer model from said instruments which have been selected; then, said apparatus assist in creating full immersion for the user in the virtual reality model by tracking and homing to instruments with haptic, or force feedback generating, receptacles with which said instruments dock by means of a numerical grid, creating a seamless interface of instrument selection and use in the virtual reality anatomy.

Claims

1. An apparatus for using selectable instruments in virtual reality medical simulations comprising:

(a) a virtual model of anatomy comprised of first memory means, a plurality of data generator and receptor means and at least one input device partially resembling a medical instrument for manual operation to create events in said virtual model;

(b) means for transmitting a plurality of signals between said at least one input device and said first memory means, said means for transmitting signals optionally comprising second memory means locally at said at least one input device;

(c) means for visually displaying actions of virtual medical instruments within said virtual model;

(d) means for electronically identifying at least one of (1) a selected input device in use, (2) a specific user of said at least one input device from among a plurality of users, and (3) the specific hand said specific user is using with said at least one input device;

(e) a plurality of force generating receptacles;

(f) a numerical three-dimensional grid for establishing the physical position of said at least one input device and of said plurality of force generating receptacles; and

(g) at least one means of target acquisition for homing on said input device and for positioning at least one of said plurality of force generating receptacles to dock with said at least one input device at a precise location derived from said virtual model and said numerical grid.

2. Apparatus as defined in claim 1 wherein said means for transmitting a plurality of signals include means for transmitting local actuation data signals from said at least one input device to said first memory means.

3. Apparatus as defined in claim 1 wherein said at least one input device partially resembles instruments selected from a group consisting of scissors, irrigator, stapler, cutter-stapler, grasper, suction device, circular stapler, flexible endoscope, injection catheter, biopsy catheter, cautery snare catheter, balloon catheter, stent-placement catheter, rotating-blade catheter, drill, routing tool, cutting laser, sealing laser, mechanical sewing tool, bridling tool, probe, camera, needle and thread, scalpel, and cannula.

4. Apparatus as defined in claim 1 wherein said virtual model is of internal anatomy.

5. Apparatus as defined in claim 1 wherein said virtual model is of external anatomy.

6. Apparatus as defined in claim 1 wherein said means for identifying a selected input device is capacitance means.

7. Apparatus as defined in claim 1 wherein said means for identifying a selected input device is electrical-mechanical key-code means.

8. Apparatus as defined in claim 1 wherein said means for identifying a specific user is capacitance means.

9. Apparatus as defined in claim 1 wherein the specific hand said user is using is identified by capacitance means.

10. Apparatus as defined in claim 1 wherein at least one of said plurality of force generating receptacles is of the haptic-arm type.

11. Apparatus as defined in claim 1 wherein at least one of said plurality of force generating receptacles is of the cylinder-receptacle type.

12. An apparatus as defined in claim 1 wherein said at least one input device comprises a plurality of input devices partially resembling a plurality of different medical instruments.

13. Apparatus as defined in claim 1 further comprising at least one sensing device within said at least one input device to detect hand motions of a user.

14. Apparatus as defined in claim 13 wherein said at least one sensing device within said at least one input device generates a feedback signal indicative of said hand motions.

15. Apparatus as defined in claim 1 wherein said means for visually displaying comprises at least one means viewable by more than one user simultaneously.

16. Apparatus as defined in claim 1 wherein said means for visually displaying comprises at least one head mounted means for individual viewing by the wearer of said head mounted means.