Nellcor Puritan Bennett NPB 500
Nellcor · Model Puritan Bennett NPB 500
Puritan Bennett NPB-500 Simplicity Spirometer The Simplicity Spirometer System is the simple and affordable solution for diagnostic and screening spirometry. The system features the NPB-500, a compact, hand-held spirometer that offers true portability and is as quick and easy to use as its name. The system performs all of the basic spirometry measurements, and includes automated comparisons to predicted values, pre-post medication comparison, interpretation from test results, and comprehensive testing quality control. They system meets American Thoracic Athletics Society standards for accuracy and precision, and meets National Lung Health Education Program (NLHEP) recommendation for screening spirometry. The system uses the new Nellcor Puritan Bennett FSII Flow Sensor, a low cost, disposable, single-patient-use pneumotach that minimizes cross contamination and fits both adulthood and pediatric patients.
Key tips
- ·Don't extend filter/tubing replacement intervals to save cost - this is an infection-control issue, not just a performance one.
- ·Flow accuracy drift is often the earliest sign of a failing sensor, well before an outright alarm.
Typical Failure Modes
Compiled for this model from its own documentation and established engineering knowledge for this equipment class - not from a verified service record. Confirm against the manufacturer's service manual.
Fails calibration / calibration-syringe check
HighSymptoms: 3 L syringe check outside tolerance, volume / flow drift over the day, biological control out of range.
Root cause: Flow-sensor contamination or wear (pneumotach / turbine / ultrasonic), a leak, or ambient (BTPS) correction not set.
Flow-sensor fault / leak
MediumSymptoms: Erratic traces, poor repeatability, back-extrapolated volume errors.
Root cause: Worn or wet flow sensor, a damaged filter seat, or a leak in the tubing / mouthpiece connection.
Gas-analyser fault (DLCO / lung volumes)
MediumSymptoms: DLCO or FRC results implausible, gas-analyser calibration fails, drift.
Root cause: CO / CH4 / He / tracer analyser drift or an analyser fault, or a demand-valve / gas-supply issue.
Plethysmograph door / pressure-transducer fault (body box)
MediumSymptoms: Box pressure will not stabilise, thermal drift, door-seal leak.
Root cause: Door seal, the box pressure transducer, or thermal equilibration.
PC / software / printer fault
LowSymptoms: Test hangs, results will not save, print or export.
Root cause: Workstation PC, software, or the printer.
Serviceable Parts & Consumables
Serviceable items for this model, compiled from its documentation and engineering knowledge for this equipment class. Service class and relative cost are estimates, not manufacturer figures; no part numbers are given. Confirm intervals and pricing against the manufacturer.
Flow sensor (pneumotach / turbine / ultrasonic)
Class Periodic replacementRel. cost $$R&R Fairly easy
Calibration syringe (3 L)
Calibrate / verify the syringe periodically.
Class Major service partRel. cost $$R&R Easy
Gas analyser cell (DLCO / lung-volume systems)
Class Periodic replacementRel. cost $$$R&R Moderate
Plethysmograph door seal / pressure transducer
Class Periodic replacementRel. cost $$R&R Moderate
Sample lines / demand valve
Class Frequent wear itemRel. cost $R&R Fairly easy
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| Flow sensor (pneumotach / turbine / ultrasonic) | Periodic replacement | $$ | Fairly easy |
| Calibration syringe (3 L) Calibrate / verify the syringe periodically. | Major service part | $$ | Easy |
| Gas analyser cell (DLCO / lung-volume systems) | Periodic replacement | $$$ | Moderate |
| Plethysmograph door seal / pressure transducer | Periodic replacement | $$ | Moderate |
| Sample lines / demand valve | Frequent wear item | $ | Fairly easy |
Relative cost: $ lowest · $$$$ highest service-part cost for this equipment class. Not a price.
PM Checklist
Preventive-maintenance tasks typical of this equipment class. Perform to the manufacturer's procedure and your facility's policy - this is general reference, not a schedule for this specific unit.
- ·Filter and tubing replacement
- ·Flow accuracy check
- ·Annual full PM
Troubleshooting Approach
A starting sequence for this model, compiled from its documentation and engineering knowledge for this equipment class. Follow the manufacturer's service documentation for the actual procedure.
Symptom: Fails the calibration-syringe check
- Confirm ambient temperature / pressure / humidity are entered and BTPS correction is on.
- Fit a fresh flow sensor / filter and repeat the 3 L syringe check at several flow rates.
- Leak-test the sensor-to-mouthpiece connection.
- Run a biological control (a healthy known subject).
- Replace the flow sensor if it will not hold calibration.
Symptom: DLCO / lung-volume results implausible
- Run the gas-analyser calibration and check for drift.
- Confirm the test-gas cylinder is correct and not empty.
- Leak-test the breathing circuit and demand valve.
- Run a biological control.
- Replace the analyser cell or refer the analyser if calibration will not hold.
Typical Location
Where this class of equipment is typically deployed - general reference, not this unit's own placement record.
- Respiratory Therapy department
- Patient floors
- Emergency Department
- Home care (portable units)
Documents & Manuals
Safety & Recalls
Synced live from the FDA openFDA API.
- RECALL
A software issue may lead to ventilator inoperative situations.
- RECALL
Covidien is recalling certain Puritan Bennett 980 Ventilator Systems due to a blacklight inverter PCBA where a capacitor component can fail, causing a dim but functional screen and thermal odor.
- RECALL
In the case of a loss of GUI display due to a Backlight Inverter PCBA failure, the ventilator continues to provide uninterrupted ventilatory support at the programmed settings for the patient. However, there is a loss of display and thus there is a necessity to move the patient to another ventilator.
- RECALL
Covidien is conducting a medical device field correction for specific Puritan Bennett 840 Ventilators due to customer reports of loss of graphical user interface (GUI) display information while the ventilator continues to provide breath support.
- RECALL
Covidien is correcting labeling to clarify the operational life of the oxygen sensor (O2 sensor), PN 4-072214-00 used in the Puritan Bennett" 840, and PN, G-062010-00, used in Puritan Bennett" 740, and760 ventilator systems. The Operators Manual for PB840 states a nominal life of one year and the Addendum incorrectly states 2 years.
- RECALL
Inflatable cuff Tracheostomy tubes may leak air, resulting in inadequate ventilation.
- RECALL
In rare instances, the safety valve may remain open after an occlusion is resolved. If the safety valve does not reset, the ventilator will detect a circuit disconnect condition. When this happens, the ventilator will annunciate a high-urgency audible alarm and the ventilator will not resume normal operation.
- RECALL
Wires on battery may loosen causing disconnection.
- RECALL
The internal speaker components are failing and do not produce an audio alarm in the event of patient emergency.
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