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General Electric – Corometrics120

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The Corometrics 120 monitor interactive training CD provides a step-by-step review of the disassembly and reassembly process. From the introduction of the parts down to the removal of the front bezel power switch, this interactive CD gives a comprehensive approach to servicing the 120 series.

  • Comprehensive maternal/fetal monitor provides the ability to address every monitoring need for both the mother and the fetus
  • Model 126: Dual ultrasound, FECG and Uterine Activity
  • Model 128: Maternal NIBP and SpO2, in addition to Model 126 features
  • Model 129: Maternal 3-lead selectable ECG in addition to Model 128 features

Description

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Dimensions

  • Height: 6.7”, 17 cm
  • Width: 16.4”, 41.9 cm
  • Depth: 17.3”, 43.9 cm
  • Weight: 24 lbs (10.9 kg) approximate

Ultrasound Mode

  • Technique: pulse Doppler with autocorrelation processing
  • Transducer type: 9-crystal
  • Pulse reception frequency: 4 kHz single ultrasound mode, 2 kHz dual ultrasound mode
  • Pulse duration: 92 µs
  • Transmitter frequency: 1.151 MHz
  • Intensity: <5mW/cm²
  • Heart rate counting range: 50-210 BPM
  • Leakage current: <10 µA at 120-240 VAC, isolated by transducer

FECG Mode

  • Technique: peak detecting, beat-to-beat cardiotachometer
  • Heart rate counting range: 30-240 BPM
  • Heart rate resolution: ±1BPM
  • Artifact elimination: switch selectable, ±25 BPM artifact rejection
  • Countable input signal range: 15 µV to 2mV peak-to-peak
  • Offset voltage tolerance (differential): ±300 mVDC maximum
  • Maximum common mode voltage: 20V peak-to-peak
  • Preamplifier bandwidth: 1-100 Hz
  • Common mode rejection: balanced > 120 dB at mains frequency, with patient cable, unbalanced = 5 kΩ RA or LA: > 110 dB at mains frequency
  • Input equivalent noise: < 10µV peak-to-peak
  • Input impedance: differential > 10 MΩ, common mode > 20MΩ
  • Mains frequency rejection: > 40 dB
  • Leakage current: < 60µA at 254 VAC, electrically isolated. Isolation, mains-to-patient: > 4 kVAC
  • Leg plate tester jack: simulated r-wave at 120 ± 1 BPM

Fetal Alarms

  • (for ultrasound or FECG modes) Audio: alternating 1.5 second chimes (773 Hz and 523 Hz)
  • Visual: flashing heart rate numeric
  • Limits: user selectable high and low fetal heart rate
  • Technical: signal quality
  • Tachycardia response time: 5 minutes at 100% limit violation
  • Bradycardia response time: 30 seconds at 100% limit violation
  • Signal quality response time: 100% signal loss – 1.25 minutes, 70% signal loss – 5 minutes, 65% signal loss – 10 minutes

Fetal Pulse Oximeter Mode

  • Technique: spectrophotometry and plethysmography
  • Saturation range: 10-100%
  • Saturation accuracy: reproducibility is one standard deviation = 4.7%. Nominally, 67 of the measurements across the population will be within ± standard deviation
  • Wavelengths: red: 735 µM, nominal; infrared: 890µM, nominal
  • Response time: user-selectable: slow and fast averaging modes
  • Transmitter frequency: 1.151 mHz

Uterine Activity Mode

  • Range: 0-100 mmHg strain gauge, 0-100 relative units tocotransducer
  • Resolution: 1 mmHg stain gauge, 1 relative unit tocotransducer
  • Bandwidth: dc to 0.5 Hz strain gauge and tocotransducer
  • Excitation voltage: strain gauge +4.0 VDC

Maternal BP Mode

  • Technique: oscillometric. Blood pressure range: 20-255 mmHg (2.7 – 34 kPa)
  • Pulse rate range: 40-240 BPM
  • Blood pressure accuracy: ±5 mmHg with a standard deviation no greater than 8 mmHg
  • Pulse rate accuracy: ±2 BPM or ± 2% , whichever is greater
  • Display/record: systolic, diastolic, and mean pressure; pulse rate

Maternal Pulse Oximeter Mode

  • Saturation range: 0-100%
  • Pulse rate range: 30-250 BPM
  • Saturation accuracy: %SpO2 ± 1 SD: 70-100% ±2 digits, 50-69% ± 3 digits. 0-49% unspecified
  • Pulse rate accuracy: ±3BPM

MECG Mode

  • Leads: II, III, and I
  • Heart rate counting range: 30-240 BPM
  • Heart rate resolution: ± BPM
  • Heart rate averaging: 1 sec
  • Maximum common mode voltage: 20 Vp-p
  • Preamplifier bandwidth: 0.6 to 40 Hz
  • Common mode rejection: balanced > 80 dB at mains frequency, with patient cable; unbalanced 5 k RA or LA > 50 dB at mains frequency
  • Input impedance: differential > 2.5 MΩ; common mode > 10 MΩ
  • Mains frequency rejection: >40 dB
  • Leakage current: < 60 µA at 254 VAC, with cable, electrically isolated
  • Alarms: Audio: alternating 1.5 seconds chimes, Visual: flashing heart rate numeric or message, Limits: user-selectable high and low maternal heart rate, technical: leads off

Power Requirements

  • Line voltage: 100/120/220/230/240 VAC
  • Line frequency: 50/60 Hz
  • Power consumption: 100W/0.4 A maximum

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