Condition Focus: Lymphatic Drainage — Direct Vessel Contractility and Waste Clearance

Blood circulation brings oxygen and nutrients to the joint; the lymphatic system removes the waste. During a gout flare, the lymphatic system must clear inflammatory debris, dead neutrophils, and dissolved urate from the joint space. If lymphatic drainage is impaired — as it can be in chronically inflamed or edematous tissue — waste accumulates and inflammation persists.

This study from Semyachkina-Glushkovskaya and colleagues provided the first direct measurement of PBM’s effects on lymphatic vessel function. Using 1267 nm light at 10 J/cm², the researchers demonstrated increased lymphatic vessel contractility (the pumping action that propels lymph fluid), increased lymph flow velocity, increased vessel diameter during both systole and diastole phases, and enhanced macrophage uptake of tagged particles (indicating improved waste clearance at the cellular level).

The lymphatic vessel contractility finding is particularly significant because it demonstrates a direct mechanical effect — PBM makes the lymphatic vessels pump more efficiently, not just reduces the swelling that might be impeding flow. This is an active clearance enhancement, not just passive improvement.

While the 1267 nm wavelength used here is longer than the G.O.A.T.’s wavelengths, the lymphatic response to PBM has been observed across wavelengths. The principle — PBM enhances the body’s clearance systems — applies regardless of the specific wavelength, and the closer wavelengths used in other lymphatic studies (650–1000 nm) encompass the G.O.A.T.’s range.

G.O.A.T. for Gout Alignment:
While this study used 1267 nm, the principle of PBM-enhanced lymphatic function applies across the broader red/NIR spectrum. The G.O.A.T.’s 850 nm wavelength provides tissue penetration sufficient to reach periarticular lymphatic vessels, potentially supporting waste clearance from the MTP joint during and between gout flares.

Link to original research here

Editor’s note: The clinical lymphedema evidence confirming PBM’s lymphatic benefits in humans is provided by Lymphedema Systematic Review 2022. The broader waste clearance principle via the glymphatic system is reviewed in Salehpour et al 2022. The vascular perfusion that complements lymphatic drainage for joint clearance is demonstrated in the RCT by Gavish et al 2020. The NO-mediated vasodilation that accompanies lymphatic flow improvement is reviewed in Keszler et al 2023.

Related Articles

• PBM for Lymphedema: Systematic Review of RCTs – 2022
• PBM and the Glymphatic System: Augmenting Lymphatic Drainage – Salehpour et al 2022
• Microcirculatory Response to PBM: RCT – Gavish et al 2020
• PBM and Nitric Oxide Signaling – Keszler et al 2023
• PBM on Swelling Reduction and Recovery in TKA – Chia et al 2025

Key Takeaways

• First direct measurement of PBM effects on lymphatic vessel contractility and flow
• Lymphatic pumping enhanced — active clearance improvement, not just passive drainage
• Macrophage uptake increased — improved cellular-level waste clearance
• Gout joints need efficient lymphatic drainage to clear urate crystals and inflammatory debris

Study Overview

Full Citation

Semyachkina-Glushkovskaya O, et al. (2020). Photobiomodulation of lymphatic drainage and clearance: perspective strategy for augmentation of meningeal lymphatic functions. Biomedical Optics Express, 11(2), 725–734. View Publication