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HT Cover Healing Light

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Biologically effective light for the intensive care beds at the University Hospital Erlangen

Since March 2019, twelve beds in the neurointensive care unit of the University Hospital Erlangen have been equipped with the HT Cover lighting solution, also known as Human Centric Lighting (HCL), which simulates the natural course of daylight

Since March 2019, twelve beds in the neurointensive care unit of the University Hospital Erlangen have been equipped with the HT Cover lighting solution, also known as Human Centric Lighting (HCL), which simulates the natural course of daylight.

The neurointensive care unit of the University Hospital Erlangen has more than 26 beds with two specialist areas and treats for patients who have suffered a stroke or a brain haemorrhage, for example. 146 nursing staff, doctors and physiotherapists/occupational therapists look after the seriously ill patients around the clock, who remain on the ward for an average of between two and 21 days. In 2018 the team treated overall 1,812 patients.
 

Markus Prinz, head of the neurointensive ward of the University Hospital Erlangen explains:
„First and foremost, we hope to use the biological effect of light to prevent a delir and to give orientation to the patients during the awakening phase. We will investigate this in detail in a comprehensive study.„
 

What means Delir?
A delir is an acute state of confusion with disturbances of consciousness, perception and limited orientation. About 50 to 80 percent of all intensive care patients suffer a delirium.
The circadian lighting solution is intended to counteract this and supports the natural day/night rhythm of patients, provides orientation and promotes a general well-being – in order to shorten recovery times and to improve long-term prognoses. „In particular, the release of the hormones melatonin, serotonin and cortisol are dependent on the circadian light rhythm. With our study, we hope to find out, how much lux is needed to regulate the release of hormones in an intensive care unit„, said Prinz.
 

HT Cover in practical use in the intensive care unit
In order to achieve an optimum lighting effect, the HT Cover lighting solutions are located above and at the front behind the twelve bed places. The ceiling elements for lighting the patient beds are on average 200 centimetres long and 120 centimetres wide. The wall elements with rounded ends are approx. 140 centimetres long and 120 centimetres wide. The dimensions can also be adapted to the needs of the customer for specific projects. Due to the low construction depth of only four centimetres, the HT Cover is ideally suited for renovation and new construction.

The light is controlled via the HT Control Smart, a DALI touch panel with a seven inch display. While the circadian lighting rhythm is fixed and starts automatically, colour temperature, brightness and coloured light can also be set manually. In addition, an emergency lighting function has been installed that provides maximum light output at the touch of a button.
With 100% illumination with cold white light (6,500 Kelvin), up to 2,700 lux can be achieved on the patient beds. For lighting with warm white light (2,600 Kelvin), the maximum luminous intensity is 2,500 lux. The use of HT Cover means that general lighting and special treatment lighting can be dispensed completely.
Furthermore, the HT Cover has a corona illumination called RGB illumination which irradiates the coloured light laterally. This allows the realization of different mood lighting or a night light functionIn suitable situations, we convert the light to green corona lighting, for example. The colour green has a positive effect on people and stands for growth, healing, balance, harmony, mercy, hope and health and is used for sleep disorders, nervousness, irritation and grief„, explains Prinz.


Positive lighting effect also for doctors, nursing staff and relatives
The light from the circadian lighting at the bed places also has a positive impact on doctors, nursing staff and relatives. Doctors and nursing staff can thus provide their patients with the best possible care in a glare-free and shadow-free lighting environment and the lighting solution in the patient rooms also provides a calming and dignified environment for relatives.

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