A study on the influence of dynamic light on sleep an circadian rhythm, in long-stay patients on a haematology ward.

N/A

Artificial dynamic lightening can positively influence the sleep/wake cycle and reduce the disturbance of the circadian rhythm due to hospitalization.

Enrolment (demographic data, medical diagnosis, medication, sleep pattern by Municher Chronotype Questionaire, global clinical impression by staff).



During study:

1. Continuous:

Actigraphy by actiwatch, environmental parameters ie vertical and horizontal illuminance levels (due to daylight and/or artificial light), use of sunscreens and/or curtains, use and adjustment by patients/staff of all lighting systems in the room, room temperature, room humidity, position patient (bed or chair), outdoor vertical and horizontal illuminance levels;

2. Once daily:

Heart rate, blood pressure, temperature, quality of sleep (Groninger Sleep Quality Scale);

3. Two times per week:

Pain scored by numeric rating scale (NRS);

4. Weekly:

Hospital anxiety depression scale (HADS), delirium (as weekly revised by a psychiatrist), complications (as noted in the decursus), use of benzodiazepines, antipsychotics, antidepressants, corticosteroids, other medication, WHO performance score, frequency and duration of swith off the study light due to medical reasons or on patients request;

5. Once during admission:

Evaluation of lighting system itself by patients;

6. Periodical:

Noise, ventilation, air flow;

7. At the end of the study:

Global clinical impression by staff, length of stay;

8. In case of early cessation of patient participation:

Reason of cessation;

9. At the end of the entire study period:

Evaluation of lighting system by staff.

On the haematology ward of the hospital, 9 single-bed rooms will be equipped with dynamic light as well as standard light. The design of the study is a randomized controlled trial. Patients will be randomized to dynamic light or standard light for their entire stay. If during a subsequent stay (ie second episode) patients participate again, they will be switched to the opposite condition.