LIVERPOOL HEART & CHEST HOSPITAL

Liverpool Heart & Chest Hospital is an NHS Foundation Trust providing care for a catchment area of 2.8 million people. The hospital provides world class heart and chest services and the cardiac surgery unit remains one of the busiest in the country.

Brief

Liverpool Heart & Chest Hospital (LHCH) approached Steon to design a new lighting scheme for the operating theatres. Their existing fluorescent luminaires were reaching the end of their serviceable life. Maintaining the luminaires can cause great disruption in theatres which are in use 24/7.

LHCH were keen to move forward with a low maintenance LED solution which was energy efficient whilst crucially meeting the lux levels and colour rendering requirements , as outlined within CIBSE guidelines.

Solution

Steon’s design team attended site to survey the theatres before designing a lighting scheme utilising our own Hermes LED modular luminaires.

The Hermes is a specialist IP65 clean room and operating theatre luminaire. It was recommended with the dual lens option which is a microprism PMMA diffuser overlaid with toughened glass. This lens option is an ideal solution for operating theatres as the microprism lens ensures low glare whilst the glass allows for easy cleaning and maintenance. The SSL lighting guide for hospitals states: “It is advisable in operating theatres to use luminaires that have glass diffusers since the close cell structure of glass cannot be penetrated by bacteria and is unaffected by sterilising materials and ultraviolet light.”

CIBSE guidelines highlight that luminaires in an operating theatre must achieve 1000lux and have a colour rendering index (CRI) of 90 or above. The Hermes units delivered the required lux levels and exceeded the required colour rendering with a CRI>95.

Other beneficial features of the Hermes LED include an extended life expectancy of 60,000 hours at L80 B10. Furthermore, the luminaire has a unique lever release system to allow for easy access into the luminaire for cleaning and future maintenance.

Throughout the design and manufacturing process, Steon worked closely with P4 to convert emergency luminaires into self-testing and reporting apparatus. This is consistent with the P4 emergency lighting system already adopted in parts of the hospital, compatibility with this system was important for LHCH.

Outcome

Following the successful completion of the project, the energy consumption has been reduced resulting in significant operational cost savings for LHCH. Critically, it will also reduce disruption within the theatres for maintenance purposes. Finally, lux levels within the operating theatre have been improved, LCHC should benefit from the new and improved lighting for many years to come

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