Coherent SELECTA 7000
Coherent · Model SELECTA 7000
SELECTA 7000 SLT LASER The Coherent Medical Lumenis Selecta 7000 is an SLT (Selective Laser Trabeculoplasty) system using a frequency-doubled, Q-switched Nd:YAG. It delivers single pulses of 0.1 to 2.0 millojoules per pulse with a pulse duration of approximately 3 nanoseconds. This low energy, short pulsed treatment confines thermal damage to cells containing the target pigment or chromophore. In the case of trabecular meshwork, this target is represented by the pigmented cells. The nanosecond pulse duration is also an important factor in preventing collateral and coagulative damage. The Selecta 7000 is specifically designed to perform selective laser trabeculoplasty (SLT), which incorporates a technique for the treatment of open angle glaucoma. SLT lowers intraocular pressure by using short pulses of an Nd:YAG laser to target melanin-containing cells in the trabecular meshwork, resulting in increased fluid outflow. The limitations of argon laser trabeculoplasty (ALT) are primarily related to its coagulative effect, which leads to scarring of the trabecular meshwork. SLT retains the therapeutic benefit of laser treatment - reduced intraocular pressure, without the collateral thermal damage to non-melanin containing cells and to the trabecular meshwork structure. The Coherent Selecta 7000 is the first FDA approved SLT laser to ever enter the market. It is stand alone and self-contained within its own slit lamp and table.
Key tips
- ·Verify laser output with a real power meter, not the unit's own display - the display can drift independently of true output.
- ·Take "the image looks a little off" reports seriously - optical alignment drift is usually gradual, not sudden.
Typical Failure Modes
Failure patterns typical of this equipment class - general BMET reference, not verified against this exact unit's own service history unless flagged. Severity is a category-level estimate.
Light source / lamp failure
MediumSymptoms: Dim illumination, lamp error.
Root cause: Xenon/LED aging.
Probe / handpiece fault
HighSymptoms: No phaco power, error.
Root cause: Tip or handpiece wear.
Pump / fluidics fault
MediumSymptoms: Unstable anterior chamber.
Root cause: Peristaltic pump wear.
Imaging sensor drift
LowSymptoms: Blurry/offset image.
Root cause: Camera calibration drift.
Serviceable Parts & Consumables
The parts a BMET typically services on this class of equipment. Service class and relative cost are general engineering estimates for the category, not figures from this unit's documentation. Part numbers appear only when pulled from this unit's own service manual. Always confirm intervals and pricing against the manufacturer.
Peristaltic pump tubing
Consumable.
Class Frequent wear itemRel. cost $R&R Easy
Imaging camera module
Class Periodic replacementRel. cost $$$R&R Difficult
Phaco handpiece / tip
High-value, track usage.
Class Periodic replacementRel. cost $$$$R&R Difficult
Illumination lamp / LED
Class Periodic replacementRel. cost $$$R&R Moderate
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| Peristaltic pump tubing Consumable. | Frequent wear item | $ | Easy |
| Imaging camera module | Periodic replacement | $$$ | Difficult |
| Phaco handpiece / tip High-value, track usage. | Periodic replacement | $$$$ | Difficult |
| Illumination lamp / LED | Periodic replacement | $$$ | Moderate |
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.
- ·Optical alignment / calibration check
- ·Lamp or laser output verification
- ·Annual full PM
Troubleshooting Approach
A structured starting point derived from the failure modes above. Follow the manufacturer's service documentation for the actual procedure.
Symptom: Light source / lamp failure
- Confirm the presentation - typically dim illumination, lamp error - and note the exact alarm or message and the conditions when it occurs.
- Check the most likely cause first: xenon/LED aging.
- Isolate the affected subsystem using the manufacturer's functional check or self-test, where one is provided.
- If the fault is confirmed and not a field adjustment, service or replace the phaco handpiece / tip per the manufacturer's service documentation.
- Return the device to service only after the manufacturer's functional and applicable electrical-safety checks pass.
- Record the findings, any parts used, and the verification results in the maintenance history.
Symptom: Probe / handpiece fault
- Confirm the presentation - typically no phaco power, error - and note the exact alarm or message and the conditions when it occurs.
- Check the most likely cause first: tip or handpiece wear.
- Isolate the affected subsystem using the manufacturer's functional check or self-test, where one is provided.
- If the fault is confirmed and not a field adjustment, service or replace the illumination lamp / LED per the manufacturer's service documentation.
- Return the device to service only after the manufacturer's functional and applicable electrical-safety checks pass.
- Record the findings, any parts used, and the verification results in the maintenance history.
Technical Specs
- Laser Type
- Nd:Yag
Typical Location
Where this class of equipment is typically deployed - general reference, not this unit's own placement record.
- Eye clinic / ophthalmology suite
- Operating Room (ophthalmic surgery)
Documents & Manuals
No documents available for this device yet.
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