Zimmer ATS 4000
Zimmer · Model ATS 4000
Limb Occlusion Pressure (LOP): Allows for patient specific pressure which ensures that the minimum pressure is used, reducing the potential for post-operative tourniquet pain or other complications, such as bruising, nerve damage, and swelling. Line Occlusion Detection (Acoustic Reflectometry): A kinked pneumatic tube can prevent an inflated cuff from deflating, resulting in unintentional tourniquet pressure. The alarm alerts OR staff that there is an occlusion in the line to the cuff and can prevent postoperative complications. Cuff Alert: If OR staff tries to turn off the device and there is still pressure in the cuff, OR staff will be alerted. This ensures that an inflated cuff is not unintentionally left on a patient. Automatic IVRA Cuff Lock Out: If both cuffs are inflated, users are warned before deflating the second cuff. This takes the guesswork out of IVRA procedures and potentially deflates both cuffs simultaneously. Additionally, the cuffs will stay inflated in the event of loss of both A/C and back-up battery power to the tourniquet machine. Advanced Leak Detection: Monitors the cuff and hoses for minor variations intraoperatively with the intention of reporting potential cuff/hose leaks. The machine will automatically maintain the pressure set point. Pre-Op Cuff Test: Checks for cuff leaks prior to use to avoid putting a new cuff on a patient in the middle of a procedure.
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.
Cuff will not inflate
HighSymptoms: Main or second cuff does not pressurise on command.
Root cause: Touch screen damaged or detecting spurious touches, internal tubing pinched or mis-connected, deflate valve stuck open, pump not plugged in, or a damaged pump/valve harness.
Cuff will not deflate
HighSymptoms: Cuff stays pressurised when deflation is commanded.
Root cause: Deflate function not used correctly (touch, slide and hold until deflation starts), deflate valve stuck shut, or a valve-driver / harness fault.
Pressure inaccurate / self-check calibration fault
HighSymptoms: Displayed pressure disagrees with a reference, self-check on power-up fails.
Root cause: Pressure transducer drift or a control-board calibration fault.
Cuff / hose leak detected
MediumSymptoms: System repeatedly tops up the cuff, leak alarm, set pressure not held.
Root cause: Cuff bladder or hose leak, or a loose positive-locking connector.
Runs on battery / short backup time
MediumSymptoms: Battery indicator lit or flashing during normal use, unit dies on transport.
Root cause: Aged backup battery or a charger fault (battery is for power-loss / transport only).
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.
Air pump
Class Major service partRel. cost $$$R&R Difficult
Inflate / deflate valve assembly
Class Major service partRel. cost $$R&R Difficult
Pressure transducer
Recalibrate after replacement.
Class Major service partRel. cost $$R&R Moderate
Touch screen / display assembly
Class Major service partRel. cost $$$R&R Moderate
Backup battery
Class Periodic replacementRel. cost $$R&R Fairly easy
Tourniquet cuff and hose
Class Periodic replacementRel. cost $$R&R Easy
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| Air pump | Major service part | $$$ | Difficult |
| Inflate / deflate valve assembly | Major service part | $$ | Difficult |
| Pressure transducer Recalibrate after replacement. | Major service part | $$ | Moderate |
| Touch screen / display assembly | Major service part | $$$ | Moderate |
| Backup battery | Periodic replacement | $$ | Fairly easy |
| Tourniquet cuff and hose | Periodic replacement | $$ | 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: Cuff will not inflate
- Confirm the touch screen accepts input and is not detecting spurious touches.
- Check the internal tubing is not pinched and all pneumatic connectors are mated.
- Confirm the pump is plugged in and its harness is undamaged.
- Check the deflate valve is not stuck open and the valve harness is intact.
- Run the functional and calibration checks after any repair.
Symptom: Pressure reading suspect
- Power-cycle and let the self-check calibration run.
- Tee a calibrated reference manometer to the cuff port.
- Compare at several set pressures across the range.
- If out of tolerance, recalibrate per the service manual or replace the transducer.
- Re-verify against the reference and record the date.
Documents & Manuals
Safety & Recalls
Synced live from the FDA openFDA API.
- RECALL
Potential sterility breach in sealing area of sterile pouch. If used, issue may result in moderate localized infection. If discovered prior to use, may result in clinically insignificant extension of surgery to find another readily available device.
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