Quality of Life of Patients With Diabetic Foot Ulcers Treated With LLLT 904 nm and Aspects Associated With Self-care Adherence: a Randomized Clinical Trial

Eighty volunteers will be recruited through the Integrated Center of Medical Specialties (ICMS) and the Center of Health Specialties (CHS) in Parnaíba-PI, Brazil, after thorough examination of the feet and evaluation by a medical professional specializing in vascular surgery. Volunteers with type 2 diabetes mellitus (T2DM) who have DFU without an infectious process (Wagner's grade I and II) will be admitted, of both sexes aged 18 years and over. Inclusion in the study will take place after signing the Informed Consent Form (ICF). The randomization will be of the simple type, a computer generated randomization list through the website https://www.randomizer.org will be used to prepare sealed, opaque and sequentially numbered envelopes. A collaborator, who will not participate in the study, will carry out the randomization process, subsequently inserting the allocation data in the envelope.

After inclusion, volunteers will be evaluated individually in a reserved room, by a previously trained evaluator and blinded to the allocation of volunteers in the groups. Volunteers will provide their personal data, medical history and duration of T2DM. Subsequently, the physical evaluation and application of the questionnaires will be carried out: (1) application of the SF-36 (Short Form-36 Health Survey) and Summary of Diabetes Self-Care Activities (SDSCA) questionnaires in the form of an interview; (2) vascular evaluation; (3) neurological evaluation; (4) determination of the level of pain and (5) capillary blood glucose.

The DFU will be located, recording the affected foot region, the duration in months and the Wagner's classification. The healing process of DFU will be monitored. The total number of LLLT applications performed until complete healing will be identified and the percentage of patients who achieved healing in relation to the cutoff points of the fifth and tenth weeks of intervention. The volunteers in the treatment groups will receive dosage as pre-established (10, 8 or 4 J/cm²) and those in the control group (CG) will receive a placebo application, that is, with the device turned off. For the treatment, the laser tip will be positioned perpendicular to the DFU, the ulcer floor will be irradiated with a sweeping application technique (1 cm away from the ulcer) and the edges with a punctual technique with contact at equidistant points. The total duration of each application will be calculated by the machine based on the selected energy density. Both the therapist and the participant will use the goggles provided before the application. The four groups will receive conventional treatment, cleansing the ulcers with saline solution and dressing with Helianthus Annuus oil.

It is expected that the participants in the treatment groups will show significant improvement in QoL and pain after the intervention, less time and a higher percentage of healing compared to the CG. Differences in the improvement of QoL and pain and in the time and percentage of healing between the LLLT dosages used are also expected. It is also assumed that adherence to self-care is capable of predicting the time and percentage of healing and QoL, in the perception that the improvement of the patient with LLLT is also influenced by his attitudes and that self-care also has effects on QoL.