IMP De Mayo Knee Positioner
IMP · Model De Mayo Knee Positioner
Single locking lever allows precise control of flexion, extension, tilt and rotation. Knee holder is like having another pair of hands in the OR. Easily set up in the sterile field over sterile drapes. Optional composite boot - Offers 110° plantar flexion for easier foot insertion - Is flexible to fit all patient anatomies - Is compatible with all CAOS navigation systems. For increased surgeon access link to MorphBoard Leg Extension Kit.
Key tips
- ·A positioner that has lost padding thickness or developed a tear no longer redistributes pressure as designed - replace it rather than keep using it.
- ·There is no electronic self-test here: condition is assessed by hands-on inspection every PM, not by an 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.
Single locking lever will not hold position
HighSymptoms: Leg position (flexion, extension, tilt, rotation) drifts after the lever is locked.
Root cause: Worn friction clutch / cam in the single-lever locking mechanism.
Boot damage or strap failure
MediumSymptoms: Cracked composite boot, torn strap or liner, foot not secure.
Root cause: Wear and repeated sterilisation of the composite boot and straps.
Table-rail clamp will not grip
MediumSymptoms: Positioner shifts on the OR table rail, clamp will not tighten.
Root cause: Worn rail clamp or clamp screw.
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.
Locking lever / friction clutch assembly
Class Major service partRel. cost $$R&R Moderate
Composite boot
Class Periodic replacementRel. cost $$R&R Easy
Boot straps and liner
Class Frequent wear itemRel. cost $R&R Easy
Table-rail clamp
Class Major service partRel. cost $$R&R Fairly easy
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| Locking lever / friction clutch assembly | Major service part | $$ | Moderate |
| Composite boot | Periodic replacement | $$ | Easy |
| Boot straps and liner | Frequent wear item | $ | Easy |
| Table-rail clamp | Major service part | $$ | 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.
- ·Visual inspection for tears, cracks, delamination, compression set, and fluid ingress
- ·Check straps, buckles, hook-and-loop, and any mounting hardware for wear and secure attachment
- ·Confirm the surface cleans and disinfects per the manufacturer's instructions for use
- ·Retire and replace once the padding no longer rebounds, splits, or fails to hold position
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: Lever locked but leg still moves
- Inspect the clutch/cam surfaces for wear or contamination.
- Clean and, where specified, lubricate per the IFU.
- Replace the locking lever / clutch assembly if it will not hold torque.
- Verify it locks solidly in flexion, extension, tilt and rotation.
- Confirm it holds under a representative load.
Symptom: Positioner slips on the rail
- Check the rail clamp and screw for wear.
- Confirm it is clamped to a clean, undamaged rail.
- Replace the clamp if it will not lock.
- Verify no movement with load applied.
- Re-check all fasteners.