Smiths Medical HL-90 Hotline
Smiths Medical · Model HL-90 Hotline
Keeps blood and fluids warm, between 37 - 42°C, delivering warm fluids to the patient at flow rates up to 5000 ml/hr. Outperforms hotplate technologies in 91% of surgical procedures. Easy to use: less time to set up and easy to disconnect from the patient. Once-a-year reservoir maintenance protocol compared to hotplate warmers, which may require maintenance up to 12 times per year.
Key tips
- ·Never skip temperature-accuracy verification to save time - it's the one check that directly prevents burns.
- ·Hose/blanket connector wear is the most common real fault and the easiest to miss on a quick visual check.
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.
Fluid / blood not reaching target temperature
HighSymptoms: Output below target, low-temperature alarm, slow warm-up.
Root cause: Heater plate(s) or the heater-control circuit, or a temperature-sensor fault.
Over-temperature alarm / shutdown
HighSymptoms: The unit disables heating with an over-temperature condition (protects against haemolysis).
Root cause: Sensor or control fault driving the heater high, or an extreme flow-rate change.
Air-detector / bubble-trap alarm (rapid infusers)
MediumSymptoms: Air-in-line alarm, flow stops.
Root cause: Air in the set, an improperly primed set, or an air-detector fault.
Disposable-set detection / fitting fault
MediumSymptoms: Set not detected, will not clamp / seat, leaks at the warming chamber.
Root cause: Worn set-detection switch or chamber fitting.
Flow / pressure fault (rapid infusers)
MediumSymptoms: Cannot reach set flow, pressure alarm.
Root cause: Pump / roller fault or an occlusion.
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.
Heater plate(s) / heater-control assembly
Class Periodic replacementRel. cost $$$R&R Moderate
Temperature sensor
Class Major service partRel. cost $$R&R Moderate
Air-detector / bubble sensor
Class Major service partRel. cost $$R&R Moderate
Set-detection switch / chamber fitting
Class Periodic replacementRel. cost $$R&R Fairly easy
Disposable warming set
Class ConsumableRel. cost $R&R Easy
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| Heater plate(s) / heater-control assembly | Periodic replacement | $$$ | Moderate |
| Temperature sensor | Major service part | $$ | Moderate |
| Air-detector / bubble sensor | Major service part | $$ | Moderate |
| Set-detection switch / chamber fitting | Periodic replacement | $$ | Fairly easy |
| Disposable warming set | Consumable | $ | 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.
- ·Hose / blanket connector inspection
- ·Temperature-accuracy verification
- ·Annual electrical safety test
Error Codes
Extracted directly from this unit's own service manual.
Over Temperaturewarming and circulating has been stopped because the recirculating solution reached a temperature above the set point. The unit must be removed from service, and repairs effected before returning to service.
The unit must be removed from service, and repairs effected before returning to service.
Not enough recirculating solutionwarming and circulating has stopped because there is not enough recirculating solution in the unit to operate the float switch.
Refill, and continue.
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: Not reaching target temperature
- Confirm the correct programme / set for the fluid type and flow rate.
- Check both heater plates warm evenly.
- Verify the output temperature against an independent reference at a representative flow.
- Replace the temperature sensor if it disagrees.
- Replace the heater plate / control assembly if output is still low.
Symptom: Over-temperature alarm
- Let the unit cool and restart.
- Compare the displayed temperature to an independent reference.
- Check for an extreme flow-rate change during use.
- Replace the temperature sensor / control board as isolated.
- Confirm stable control across the flow range before returning to service.
Typical Location
Where this class of equipment is typically deployed - general reference, not this unit's own placement record.
- Operating Room
- PACU
- Emergency Department
- Labor & Delivery
- NICU
Documents & Manuals
Safety & Recalls
Synced live from the FDA openFDA API.
- RECALL
HOTLINE Blood and Fluid Warmers included Greek and Danish language labeling instead of the required Finnish labeling.
- RECALL
Injection port of the Set may leak blood/ IV fluids from the septum of the injection port or the septum may become dislodged.
- RECALL
HOTLINE 3 Blood and Fluid Warmer( Reorder No. HL-390 ) disposable is not correctly installed , the microswitch may become damaged and unusable
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