Graseby Medical MR10
Graseby Medical · Model MR10
MR10 Infant Respiration Monitor The MR10 is a single channel respiration monitor with a choice of a 10 or 20 second apnea delay. To work, the Monitor requires a Respiration Sensor. The Sensor is attached to the baby’s abdomen and is linked to the Monitor by a narrow tube.
Key tips
- ·Never disable a low-pressure/circuit-disconnect alarm while troubleshooting - silence it, don't disable it.
- ·Verify the O2 supply source and pressure before assuming an internal fault.
- ·Circuit type must match the patient population (adult/pediatric/neonatal) - a mismatched circuit invalidates delivered volumes.
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.
- ·Daily pre-use check: self-test, circuit integrity, alarm function
- ·Scheduled circuit and inspiratory filter replacement per manufacturer interval
- ·Flow and pressure sensor calibration verification
- ·Battery load test and runtime check
- ·Annual full PM and electrical safety test
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.
- ICU / CCU
- Emergency Department
- Operating Room (anesthesia-adjacent)
- NICU
- Respiratory Therapy department
- Patient transport
Documents & Manuals
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