Efficacy of Prophylactic Low Level Laser Therapy (LLLT) Performed by Nurses for Decreasing Severity of Oral Mucositis During Hematopoietic Stem Cell (HSC) Transplantation

"Patients randomized to the experimental arm receive in addition to mouthwash, preventive treatment of mucositis by LLLT performed by nurses consisting of daily scanning the entire oral cavity for 2 minutes with a power of 250 mW, starting with conditioning and ongoing until the onset of mucositis of grade 1.~If the mucositis is localised, preventive laser will be kept on the healthy zones, and curative laser will be performed on painful zone. If the mucositis is general (more than 1 site), preventive laser is stopped for curative laser only."

"Patients randomized to the Placebo arm receive in addition to mouthwash fictive laser treatment performed by nurses until the onset of mucositis of grade 1.~If the mucositis is localised, fictive laser will be kept on the healthy zones, and curative laser will be performed on painful zone. If the mucositis is general (more than 1 site), fictive laser is stopped for curative laser only."