General Electric – Corometrics 259

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The GE Corometrics 259 is a maternal/fetal monitoring system. This unit is a full antepartum/intrapartum fetal monitor that includes innovative features that help clinicians deliver a high-quality birthing experience and enhanced patient care. The Corometrics 259 monitors uterine and fetal activity including fetal heart rate, and has enhanced maternal monitoring features including temperature, oxygen saturation, ECG, and non-invasive blood pressure. The 259 provides a comprehensive perinatal monitoring and the flexibility and convenience that give you instant access to the detailed information you need during labor and delivery. Having that information readily available helps you provide a positing birthing experience for the mother and baby.


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GE

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The Corometrics 259 is a medical device for monitoring maternal/fetal parameters. This monitor is equipped with a color LCD display which provides simultaneous display of fetal and maternal parameters plus the maternal waveforms. On the right side of the front of the unit is the recorder. The recorder prints continuous trends and alphanumeric data on one strip chart. The system is compatible with Centricity Perinatal Clinical Information Systems and other information systems to streamline, capture, and archive patient data. The 259 supports two fetal heart rate (FHR) channels, Uterine Activity (TOCO or IUP), maternal non-invasive blood pressure (NIBP), maternal pulse oximetry (MSpO2), fetal ECG (FECG), and Maternal ECG (MECG).

On the back of the unit there are many data ports for inputting and outputting data and power. You have a Telemetry Connector, Data Entry Connector, Nurse Call System, Central Systems Connector, External VGA Connector, Communication Connectors, ECG Out Connector, Fetal Acoustic Stimulator Connector, Remote Event Marker Connector, and a Power Inlet Module.

When powering up the Corometrics 259 Fetal Monitor, the unit automatically performs a number of tests to verify the integrity of the system memory, processor, and voltage levels before allowing the monitor to enter a normal operation mode. The pulse oximetry module is also tested and automatically calibrated upon power up, or whenever the unit is reset.

  • Maternal Blood Pressure
  • Maternal Temperature
  • Maternal Oxygen Levels
  • MECG
  • Centricity Perinatal (CPN)
  • Telemetry Interface)
  • Smart BP
  • Backlit keys
  • Dimmable display
  • 9-crystal ultrasound technology
  • One-touch hot keys

GE Corometrics 259 Specifications

Dimensions

  • Height: 6.7″ (17 cm)
  • Width: 16.7″ (42.4 cm)
  • Depth: 17.5″ (44.4 cm)
  • Weight: 22 lbs (10.9 kg)

Power

  • Nominal Line Voltage: 100 VAC, 120 VAC, 220 VAC, 230 VAC, 240VAC
  • Line Frequency: 50/60Hz
  • Power Consumption: 100 W, 100 W, 0.4 A, 0.4 A
  • Chassis Leakage: <300 μA

Environmental

Operating

  • Ambient Temperature: 50°F to 104°F (10°C to 40°C)
  • Relative Humidity: 10% to 95%, non-condensing
  • Atmospheric Pressure: 700–1060 mbar (525–795 mmHg)

Storage

  • Ambient Temperature: 14°F to 131°F (–10°C to 55°C)
  • Relative Humidity:0% to 95%, non-condensing
  • Atmospheric Pressure:700–1060 mbar (525–795 mmHg)

Recorder

  • Speed: 1, 2, and 3 cm/min
  • Speed Accuracy: ± 1%

FECG

  • Technique: Peak detecting, beat-to-beat cardiotachometer
  • Heart Rate Counting Rage: 30-240 bpm
  • Heart Rate Resolution: ± 1 bpm
  • Artifact Elimination: Selectable, ± 25 bpm artifact rejection
  • Countable Input Signal Range: 15 μV to 2 mV peak-to-peak
  • Offset Voltage Tolerance (Differential): ± 300 mVdc maximum
  • Maximum Common Mode Voltage: 20 V peak-to-peak
  • Preamplifier Bandwidth: 1–90 Hz
  • Common Mode Rejection:
    • Balanced: > 120 dB at mains frequency, with a patient cable
    • Unbalanced 5kΩ RA or LA: > 110 dB at mains frequency
  • Input Equivalent Noise: < 10 μV peak-to-peak
  • Input Impedance:
    • Differential: > 10 MΩ
    • Common Mode: > 20 MΩ
  • Mains Frequency Rejection: > 40 dB
  • Leakage Current: < 10 μA at 100-240 VAC, electrically isolated
  • Isolation, Mains-to-Patient: > 4 kVAC

Ultrasound Mode

  • Technique: Pulsed Doppler with autocorrelation processing
  • Transducer Type: 9-crystal
  • Pulse Repetition Frequency:
    • Single Ultrasound Mode: 4 kHz
    • Dual Ultrasound Mode: 2 kHz
  • Pulse Duration: 92 μs
  • Transmitter Frequency: 1.151 MHz
  • Spatial-Peak Temporal Average Intensity: Ispta < 10 mW/cm2
  • Spatial-Average Temporal Average Intensity: Isata< 5 mW/cm2
  • Focal 20 dB Beam Area: 16.6 cm2 , at a range = 7 cm
  • Peak Instantaneous Intensity: 1.8 mW/cm2
  • Peak-Negative Acoustic Pressure: p < 10.0 kPa
  • Heart Rate Counting Range: 50–210 bpm
  • Leakage Current: < 100 μA at 100-240 VAC, isolated by the transducer

Uterine Activity Mode

Tocotransducer

  • Range (typical): 0–100 mmHg (0–13.3 kPa)
  • Resolution: 1 mmHg (0.13 kPa)
  • Bandwidth: dc to 0.5 Hz
  • Excitation Voltage:
    • Zero Set Temperature Drift: < 0.1 mmHg/°C (0.013 kPa/°C), excluding transducer
    • Leakage Current: < 100 μA at 100-240 VAC, electrically isolated

MECG

  • Technique: Peak detecting, beat-to-beat cardiotachometer
  • Maternal ECG Electrode Type: Medtronic 1700-003 or equivalent
  • Leads Available: I, II, and III
  • Heart Rate Counting Range: 30–240 bpm
  • Heart Rate Resolution: ± 1 bpm
  • Heart Rate Update Rate: > 1 update per second
  • Countable Input Signal Range: 0.5 mV to 5 mV peak-to-peak
  • Baseline Drift: < 0.5 mV RTI
  • Tall T-wave Rejection: 0.8 x QRS amplitude
  • Heart Rate Meter Response Time:
    • 80–120 bpm Step Increase: < 2 seconds
    • 80–40 bpm Step Decrease: < 3 seconds
  • Alarm Time for Tachycardia 80–200 bpm: < 10 seconds (high alarm limit at 100 bpm)
  • Offset Voltage Tolerance (Differential): ± 300 mVdc maximum
  • Maximum Common Mode Voltage: 20 V peak-to-peak
  • Preamplifier Bandwidth: 0.6 to 40 Hz
  • Common Mode Rejection:
    • Balanced: > 80 dB at mains frequency, with a patient cable
    • Unbalanced 5K RA or LA: > 50 dB at mains frequency
  • Input Equivalent Noise: Input Impedance: < 30 μV peak-to-peak
    • Differential: > 2.5 MΩ
    • Common Mode: > 10 MΩ
  • Mains Frequency Rejection: > 40 dB
  • Mains Frequency Rejection: > 40 dB
  • Leakage Current: < 10 μA at 100-240 VAC, with cable, electrically isolated
  • Isolation, Mains-to-Patient: > 4 kVAC
  • Leads Off Detection: dc current < 0.1 μA
  • Alarms:
    • Audio: Alternating 1.5-second chimes
    • Visual: Flashing heart rate numeric or message
    • Limits: User-selectable high and low maternal heart rate
    • Technical: Leads of
    • Tachycardia Response Time: < 8 seconds