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VR Interfaces: SimMan 3G Patient Simulator

Overview

Overview of SimMan 3G Patient Simulator
Laerdal Medical 's third generation patient simulator mannequin was designed to be as realistic as possible, given 2009 technology levels.The SimMan 3G can cry, bleed, convulse, go into cardiac arrest, and produce symptoms of a myriad of common medical ailments.

The mannequin is physical, so it has both the advantages of full tactile response, and the disadvantages of requiring repair after a cutting session. That said, there have been significant improvements over previous versions. For example, this simulator robot is completely wireless and self-contained. Likewise, control boards for the unit, are self-contained in and of themselves, deriving power from battery packs, and untethering themselves from location - the simulator can be placed en situ for vastly increased realism.

A full physiological model engine in the internal computer system will track treatment and respond appropriately. For example, cut into a major blood tube, and in addition to the sudden spurting of artificial blood, pressure sensors detect the change, localize it, and the engine immediately adjusts the rest of the body to reflect sudden critical blood loss, with appropriate symptoms.

Currently, the following can be replicated by the simulator:

  • Degrees of seizures and convulsions can be created from minor effect through to a full convulsion
  • Wound models can be connected to an internal blood reservoir which will bleed both from arterial and venous vessels.
  • Palpable pulses
  • Blood pressure wave forms
  • ECG artifacts
  • Eye secretions as in response to chemical, biological, radiological and nuclear agents
  • Pupillary responses to light, blinks at slow, normal and fast rates, winks and open, partially open and closed reactions.
The control units function as touchscreen controls and monitors, receiving a real-time data stream from the simulator, which can be transported around the immediate area - about 20 metres away from the simulator, without issue. In addition, real-time feedback is delivered through the control/analysis units on the following:
  • Compression rate
  • Depth of externally exerted pressure
  • Blood pressure by area
  • Release timing for CPR
  • Hands-off time for CPR
An advanced Drug Recognition System which attempts via biochip circuitry, to identify the amount, speed and type of drug entered into the 'bloodstream' of the simulator. This data is then fed straight into the psychological model, and used to trigger appropriate physiological responses. Obviously, this still does not work perfectly, especially during a long training session.


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