Medtronic NIM-Response 2.0

Medtronic NIM-Response 2.0 Features

The Medtronic NIM-Response 2.0 is a four-channel EMG monitor for intraoperative use during surgeries in which a motor nerve is at risk due to unintentional manipulation. The NIM-Response 2.0 records electromyographic (EMG) activity from muscles innervated by the affected nerve. This monitor will assist early nerve identification by providing the surgeon with a tool to help located an identify the particular nerve at risk within a surgical field. It will continuously monitor EMG activity from the muscles innervated by the nerve at risk to minimize trauma by alerting the surgeon when a particular nerve has been activated.

• 4-channel EMG monitor that are individually and simultaneously selectable.
• High contrast digital color touch display.
• Increased sensitivity with reduced interference.
• Printable log of patient’s EMG activity.
• More sensitive to lower-level EMG activity with improved signal-to-noise ratio.
• Quick setup.

Medtronic NIM-Response 2.0 Specifications

Dimensions

• Height: 10.6” (27 cm)
• Width: 12.2” (31 cm)
• Depth: 14.5” (37 cm)
• Weight: 18.7 lbs (8.5 kg)

Display

• Type: High contrast, digital, graphic Color, visible in complete darkness.
• Resolution: Display 600H x 800W pixels, Touch Panel 256H x 256W
• Dedicated Function Event Touch Screen Controls: For Amplitude, Time Display and Capture.
• Vertical Display: 50, 200, 500 and 2,000 μV display modes.
• Event Capture: Enable/disable capture mode indicator on touch screen.
• Time Scale: 50ms or 10s display modes.

Amplifier

• Channels – 1 to 4: Individually and simultaneously selectable.
• Input Sensitivities: 5 – 10,000 μV peak-to-peak AC-coupled
• Sensitivity Selection: Automatically zeroed
• Bandpass: 100 Hz – 2 kHz EMG Display; 200 Hz – 3.2 kHz Audio EMG Speaker
• Input Noise: 5-11 μV p-p < 3 μV RMS @ DC – 4 Hz, inputs shorted
• Input Impedance: > 200 K Ohm ± 10%
• DC Offset Rejection: ± 0.540 V DC Rejection
• Common Mode Rejection: >90 dB @ 60 Hz, balanced inputs, >70 dB @ 60 Hz, 1 K
• Channel Enable/Disable Controls: Dedicated function touchpads for independent channel enable/disable.
• Event Threshold Control and Display: Adjustable Graduated Touch Bar with Voltage threshold displayed.
• Patient Isolation: 1,000 Vrms 60 Hz < 100 μA

Impedance Measurement

• Control: Automatic CHECK ELECTRODE feature
• Measuring Signal: 20 μA peak-to-peak, 60 Hz Square wave
• Measurement Range: 0-200 K Ohm ± 10%

Artifact Detection and Rejection

• Stimulus Artifact: Synchronized and adjustable muting.
• Electrocautery Interference: Automatic detection, muting and warning.
• Electrode Lead Off: Automatic detection, muting and warning.

Stimulator

• Stimulus Type Constant: Constant Current
• Stimulus Range: 0-30 mA, maximum 120 V compliance
• Stimulus Control: Digitally controlled, range – dependent adjustment increments of .01, .05, 1.0 and 5.0 mA.
• Stimulus Output Accuracy: ± .02 mA (or ± 5% of reading at 1K load) over Stimulus Range.
• Stimulus Adjustment: Graduated Touch Screen Control with display of command current and delivered current.
• Stimulus Measurement Accuracy: ± .02 mA (or ± 5% of reading at 1K load) over Stimulus Range.
• Internal Fuse: 32 mA Type F, 250V 5 x 20mm (It must be Xomed # 8250615, other similar fuses may not give the same degree of protection.

Stimulus Characteristics

• Waveform: Monophasic, square pulse
• Duration: Software selectable, 50, 100, 150, 200 or 250 μs
• Rise Time: Less than 20 μs
• Rate: Software selectable, 1, 4, 7, or 10 Hz
• Stimulus Probe: Monopolar (standard) or bipolar

I / O – Printer Output / Disk Drive Output

• Printer Interface: Hewlett-Packard: Model: DeskJet 5650 printer.
• Connection: Centronics Parallel 36-pin female or USB (2)

Video Output

• Interface: VGA Compatible, 800 x 600 resolution
• Connection: 15-pin HD

Electrical

• Input Voltage: 100V, 120V, 220V, and 230-240V ± 10%
• Frequency: 50/60 Hz
• Power Consumption: 47 W Nominal, <70 W Peak
• Auxiliary AC output: 250 VA Max.
• Line Isolation: 4000 V Peak-to-Peak 60 Hz dielectric withstand from Line
• Internal Fuse: 5 x 20mm, 4Amp, 250V, Quick-acting, Low breaking capacity, Xomed Part # 11270037. Order 8250614 Fuse Kit for replacements.