The effectiveness of the 1064nm wavelength lies in its specific affinity for oxyhemoglobin. By targeting this chromophore, the laser directly addresses the vascular dilation and lymphocytic infiltration that characterize the inflammatory phase of Striae Rubra (red stretch marks).
Striae Rubra is fundamentally a vascular and inflammatory issue. The 1064nm wavelength succeeds by sealing off the dilated blood vessels responsible for the red appearance while simultaneously using thermal energy to trigger the body's natural dermal repair mechanisms.
Targeting the Vascular Root Cause
Specific Absorption by Oxyhemoglobin
The primary mechanism of the 1064nm wavelength is its ability to be absorbed by oxyhemoglobin, the oxygen-carrying pigment in red blood cells.
Because Striae Rubra is defined by vascular dilation, this wavelength ignores the surrounding tissue and focuses its energy strictly on the blood-rich defects.
Addressing Lymphocytic Infiltration
During the inflammatory phase, stretch marks are often sites of lymphocytic infiltration, contributing to their active, red appearance.
The 1064nm laser penetrates deep enough to reach these vascular structures, delivering energy precisely where the inflammation is centered.
The Biological Mechanism of Action
Closing Dilated Microvessels
Upon absorption by oxyhemoglobin, the laser energy generates heat within the blood vessels.
This thermal reaction causes the abnormally dilated microvessels to coagulate and close. As these vessels shut down, the visual erythema (redness) associated with the stretch mark significantly diminishes.
Stimulating Dermal Self-Repair
Beyond simply closing vessels, the treatment converts thermal energy into biological signals.
This controlled heating creates a "thermal injury" response without damaging the epidermis. The body responds to this signal by initiating a wound-healing cascade.
Inducing Collagen Proliferation
A critical outcome of this thermal signaling is the proliferation of new collagen.
As the dermis repairs itself, the texture of the stretch mark improves, moving the skin from an active inflammatory state toward a restored structural state.
Understanding the Clinical Limitations
Dependence on Vascular Targets
The efficacy of this specific mechanism relies heavily on the presence of oxyhemoglobin.
If the stretch marks have already progressed to Striae Alba (white stretch marks), the vascular target is missing, and the 1064nm wavelength will lose its primary method of action.
Thermal Energy Management
The process requires the conversion of laser light into thermal energy to work.
While this stimulates repair, it requires precise energy delivery to ensure the heat remains therapeutic rather than destructive to the surrounding healthy tissue.
Optimizing Treatment Decisions
To maximize the benefits of the 1064nm wavelength, consider the current state of the tissue.
- If your primary focus is reducing redness: Rely on the 1064nm wavelength to coagulate the dilated microvessels and resolve the active inflammatory appearance.
- If your primary focus is long-term structural repair: Leverage the thermal energy conversion to stimulate the collagen proliferation necessary for strengthening the dermal matrix.
Success with Striae Rubra comes from intervening during the inflammatory window when vascular targets are most abundant.
Summary Table:
| Mechanism | Action on Striae Rubra | Clinical Benefit |
|---|---|---|
| Oxyhemoglobin Absorption | Targets dilated microvessels | Rapidly reduces erythema and redness |
| Deep Dermal Penetration | Reaches lymphocytic infiltration | Addresses the inflammatory root cause |
| Thermal Conversion | Creates controlled thermal injury | Triggers the body's natural healing cascade |
| Neocollagenesis | Stimulates collagen proliferation | Improves skin texture and structural integrity |
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References
- Omneia Alaa Selim, Tarek Amin. Long-Pulsed Nd:YAG Laser as a Therapeutic Option for Striae Distensae. DOI: 10.33545/26649411.2025.v8.i2a.237
This article is also based on technical information from Belislaser Knowledge Base .
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