Frequently Asked Questions
Reduces surface epidermal temperature = prevents burns + improved patient comfort.
Generally -5°C to 0°C sapphire; protects epidermis without compromising dermis treatment.
No, dermis treatment unchanged; epidermis better protected = improved safety profile.
Sapphire: reliable, controlled, immediate. Cryogenic air: sometimes less uniform but acceptable.
Regular cleaning; replacement if scratched (every 2-3 years depending on use).
Possible but not recommended; risks epidermal burns, increased patient discomfort.
Définition
Contact cooling refers to the ensemble of systems that maintain the skin surface at reduced temperature during laser pulse. This technique creates a protective thermal barrier while maintaining laser light transmission.
Caractéristiques
| Method | Mechanism | Temperature | Advantages | Limitations |
|---|---|---|---|---|
| Sapphire | Crystal thermal conduction | -10 to +25°C | Excellent transmission, durable | High cost |
| Peltier | Thermoelectricity | -5 to 0°C | Precise, adjustable, ecologically sound | Energy consumption, limited capacity |
| Cryogen | Refrigerant gas pulverization | -20 to -35°C | Very effective, high fluences | Consumable cost, environment |
| Forced Air | Cold air circulation | Approximately -5°C | Economic, ecologically sound, safe | Reduced efficacy, moderate fluences |
Références scientifiques
- Altshuler GB et al. Lasers Surg Med 2001;29(5):416-432
- Lepselter J, Elman M. J Dermatolog Treat 2004;15(2):72-83
Sources scientifiques
- . . Lasers Surg Med (2001) ;29 :416-432 . PMID: 12030874
- . . J Cosmet Laser Ther (2008) ;10 :24-33 . PMID: 18330795
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