Background and Identification

The Nellcor Puritan Bennett NPB-190 is a pulse oximeter made by Mallinckrodt’s Nellcor division. Pulse oximeters are non-invasive devices used to monitor a patient’s oxygen saturation. The Nellcor division focuses mainly on producing pulse oximeters and oxygen monitors.

The NPB-190 is intended for continuous measurement of the patient’s pulse rate and functional oxygen saturation of arterial hemoglobin. It is suitable for use with adult, pediatric, and neonatal patients. This model is designed for use in the home and in all hospital-type facilities. When powered by its internal battery, this monitor can also be used during intra-hospital transport.

Digital displays indicate the patient’s oxygen saturation and pulse rate. A 10-segment LED bar shows the patient’s pulse amplitude. Alarms are produced when a variable moves outside the operator-defined limits. The operator can adjust high and low alarm limits for pulse rate and oxygen saturation.

The NPB-190 pulse oximeter includes the name “NELLCOR PURITAN BENNETT” printed in capital letters above the device’s display. The model number, ‘NPB-190,’ is also printed above the monitor’s display. This model operates either on AC power or on a rechargeable internal battery.

For troubleshooting, disassembly, and repair information, see the Nellcor Puritan Bennett NPB-190 Service Manual. Common problems are typically categorized into power, buttons, display/alarms, operational performance, and serial port.

Technical Specifications

GENERAL

  • Designed to meet safety requirements of: UL 2601-1 CSA-C22.2 No. 601-1-M90, IEC 601-1 (Class I, type BF)
  • EMC per EN60601-1-2

ELECTRICAL

  • Protection Class: Class I: per IEC 601-1, clause 2.2.4
  • Degree of Protection: Type BF: per IEC 601-1, clause 2.2.25
  • Mode of Operation: Continuous
  • Battery
    • Type: Rechargeable, sealed lead-acid, internal
    • Operating time: 12 hours minimum on new, fully charged battery
    • Recharge period: 14 hours for full charge
  • Fuses:
    • 2 each 5 X 20 mm
    • Slow Blow. 0.5 amp, 250 volts
  • AC Power
    • Selectable by switch:
      • 100-120 VAC 50/60 Hz or
      • 200-240 VAC 50/60 Hz

PHYSICAL CHARACTERISTICS

  • Dimensions: 3.3 in H x 10.4 in W x 6.8 in D, 8.4 cm H x 26.4 cm W x 17.3 cm D
  • Weight: 5.5 lb, 2.5 kg

ENVIRONMENTAL

  • Operating Temperature: 5°C to 40°C (+41°F to +104°F)
  • Storage Temperature:
    • Boxed: -20°C to +70°C (-4°F to +158°F)
    • Unboxed: -20°C to +60°C (-4°F to +140°F)
  • Operating Atmospheric Pressure: 700 hPa to 1060 hPa (20.65 inHg to 31.27 inHg)
  • Relative Humidity: 15% RH to 95% RH, noncondensing

ALARMS

  • Alarm Limit Range
    • % Saturation: 20–100%
    • Pulse Rate: 30–250 bpm

FACTORY DEFAULT SETTINGS

  • SpO2 High Alarm: 100%
  • SpO2 Low Alarm: 85%
  • High pulse rate Alarm: 170 bpm
  • Low pulse rate Alarm: 40 bpm
  • Audible Alarm Volume: Level 5
  • Audible Alarm Silence Duration: 60 seconds
  • Pulse Beep Volume: Level 4
  • Communication Protocol: Serial output mode ASCII
  • Alarm Silence Behavior: Off with a reminder
  • Baud Rate: 9600

PERFORMANCE

  • Measurement Range
    • SpO2: 0–100%
    • Pulse/Heart Rate: 20–250 bpm
  • SpO2 Accuracy
    • Adult:
      • 70–100% ± 2 digits
      • 0–69% unspecified
    • Neonate:
      • 70–100% ± 3 digits
      • 0–69% unspecified

Additional Information

Nellcor NPB-190 Operator’s Manual

Nellcor NPB-190 Replacement Battery on Amazon.com

Nellcor NPB-190 Service Manual