The Effectiveness of Using Low-level Light Therapy to Treat Sleep and Psychological Symptoms Among Shift-work Nurses

Study Overview
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Brief Summary
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The purpose of this study is to explore the treatment of Low Level Light Therapy(LLLT) mitigate possible insomnia and psychological symptoms, when nurses have taken shifts.The investigators hope that the goal of this interventional research is to improve sleep quality and psychological symptoms of shift nurses in order to promote health.

Detailed Description
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Low-Level Light Therapy; LLLT is also called PhotoBioModulation; PBM, which is a new type of interventional therapy.LLLT applies low-level lasers or light-emitting diodes(LEDs) to the human body for treatment. The wavelength of irradiated light is between red light(630-700 nm) and near-infrared light(700nm-1,100nm), and leads to a positive biological effect. It is a safe, painless, non-invasive treatment method. When LLLT is applied to the brain, it can pass through the scalp, head bone and reach the brain, and then stimulating the photochemical reaction in the cells, This is called transcranial Low-Level Laser Therapy (t-LLLT) or transcranial Photobiomodulation(t-PBM). tLLLT has existed since 1967, and more than thousands of scientific studies have shown that photons can stimulate biological responses and promote the normal work of cells. t-LLLT can treat a variety of diseases, such as emotional symptoms, lower back pain, weight loss, skin anti-aging, wound healing, etc. There are no reports of side effects. The main mechanism is similar to the photosynthesis of plants. It absorbs light and produces chemical reactions, supports mitochondrial function, and significantly increases the production of ATP(the main carrier of energy in cells.)in the brain, so as to function work better and achieve self-repair. This research uses Dr. Tai's energy cap, the manufacturer is Topunion Globaltek Inc., which passed the certification of the Ministry of Health and Welfare(MOHW) for medical device in 2019. It has been modified to the second generation and is now on the market. It basically provides two kinds of red light (wavelength of 660nm) and near-infrared light(wavelength of 850nm), which is mainly used at home. The research intervention will be conducted for four weeks, pre-tests and post-tests will be conducted as indicators to evaluating sleep and psychological symptoms.

Official Title
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The Effectiveness of Using Low-level Light Therapy to Treat Sleep and Psychological Symptoms Among Shift-work Nurses：A Randomized-controlled Trial

Conditions
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Shift Work Type Circadian Rhythm Sleep Disorder

Intervention / Treatment
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* Device: use low level light therapy,The Dr.Tai's energy cap


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Registered nurses who consciously have insomnia and ISI>=9. People who have clear consciousness, can understand and agree to participate in this research. Registered nurses who have been on shifts in the past six months. Have the same type of shift within the four weeks. Exclusion Criteria: Those who have undergone head surgery. Those who are pregnant.

Ages Eligible for Study
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Minimum Age: 22 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Supportive Care
Allocation: Randomized
Intervention Model: Parallel Assignment
Interventional Model Description: 1.Registered nurses who consciously have insomnia and ISI>=9. 2. People who have clear consciousness, can understand and agree to participate in this research. 3. Registered nurses who have been on shifts in the past six months. 4. Have the same type of shift within the four weeks.
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: LLLT group<br>use low level light therapy,The Dr.Tai's energy cap | Device: use low level light therapy,The Dr.Tai's energy cap<br>* 30 minutes each time, three times a week, a total of 12 times.<br>|
| No Intervention: control group<br>routine care. | |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| psychological symptoms | use scale:Depression Anxiety Stress Scale-21(DASS-21)measure psychological symptoms.There are a total of 21 questions on the scale, each with a score of 3 and a score of 0 to 63. The higher score mean a worse outcome,mean psychological symptoms are severe.The higher the score the more severe the symptoms, the lower the score the more minor. | 1 month,up to 4 weeks.measure every 1 week.Change from baseline DASS-21 at 1,2,3,4 weeks, a total of five times. | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| sleep symptoms | use scale:Insomnia Severity Index(ISI) measure sleep symptoms.There are a total of 7 questions on the scale, each with a score of 4 and a score of 0 to 28. The higher score mean a worse outcome,mean sleep symptoms are severe.The study measure use ISI scale every 2 weeks | 1 month,up to 4 weeks.Change from baseline ISI at 2,4 weeks. | 
| instrument:Heart rate variability(HRV) | heart rhythm variability and autonomic nerves, so this study used this instrument as an objective data collection. | Measure three days a week, two time points (T0, T1) for each measurement, T0=baseline, and T1=after 30mins,24 times in both groups. | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Anxiety, Depression, nurses, LLLT