MedRad Mark IV
MedRad · Model Mark IV
MedRad Mark IV is classified as Contrast Media-Injector System (Medical Imaging). No manufacturer description has been sourced for this model yet.
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.
Will not prime / inject / pressure fault
HighSymptoms: Injector will not advance the plunger, stalls, pressure-limit or motor-fault alarm.
Root cause: Drive-motor / lead-screw wear, a syringe-interface / plunger-ram fault, or a pressure-transducer fault.
Air-detection / air-column fault
MediumSymptoms: Air-detector alarms with no air, or fails to detect air, will not arm.
Root cause: Air-detector sensor or a dirty / damaged sensor window.
Head / control-room communication fault
MediumSymptoms: The console loses the injector head, hand-controller unresponsive, arm / pause not working.
Root cause: Head-to-console cable / wireless link or a board fault.
Heater / warmer fault
LowSymptoms: Contrast not warmed, warmer alarm.
Root cause: Syringe / bath heater or its sensor.
Battery / power fault (mobile heads)
MediumSymptoms: Short run time, will not hold charge.
Root cause: Aged battery pack.
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.
Drive motor / lead-screw assembly
Class Major service partRel. cost $$$R&R Difficult
Plunger ram / syringe-interface assembly
Class Major service partRel. cost $$R&R Moderate
Pressure transducer
Class Major service partRel. cost $$R&R Moderate
Air-detector sensor
Class Major service partRel. cost $$R&R Moderate
Battery pack (mobile heads)
Class Periodic replacementRel. cost $$R&R Fairly easy
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| Drive motor / lead-screw assembly | Major service part | $$$ | Difficult |
| Plunger ram / syringe-interface assembly | Major service part | $$ | Moderate |
| Pressure transducer | Major service part | $$ | Moderate |
| Air-detector sensor | Major service part | $$ | Moderate |
| Battery pack (mobile heads) | Periodic replacement | $$ | Fairly easy |
Relative cost: $ lowest · $$$$ highest service-part cost for this equipment class. Not a price.
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: Will not prime or inject
- Load a fresh syringe and confirm it seats and the ram engages.
- Run the prime / test-inject and note any pressure or motor alarm.
- Inspect the plunger ram and lead-screw for wear.
- Check the pressure-limit setting for the catheter / protocol.
- Replace the drive / ram assembly as isolated and re-verify flow / pressure.
Symptom: Air-detector or communication fault
- Clean the air-detector sensor window and reseat the tubing.
- Confirm the air column is purged.
- Reseat or swap the head-to-console cable.
- Reboot the console and head.
- Replace the air-detector sensor or refer the communication board.