References

Berlin Heart: INCOR cardiac support system

Berlin Heart: INCOR cardiac support system – By kind permission of Berlin Heart GmbH, Berlin –

Hybrid cable from LEONI connects implant and power supply unit

INCOR is a so-called left cardiac support system that supports the pumping function of the left ventricle (chamber of the heart) which is responsible for the body’s circulation. As well as the actual blood pump, which is placed next to the heart, the system also includes a small external unit and two batteries, which offer the patient almost unrestricted freedom of movement.

The pump is connected to the control unit by means of a highly complex, miniaturised hybrid cable from LEONI. Despite their small external diameter of just 7.14 millimetres, the cables tick every box in terms of the precision and reliability required for use in and on the human body. For example, kink tests of ± 90° must be withstood just as effectively as all other mechanical stresses. With this in mind, LEONI sheaths the cables in a special supporting mesh that provides both anti-kink protection and strain relief. At the customer’s facility, the cable is then completely enclosed in a silicon tube and is covered with a layer of polyester velour at the point of entry, enabling the cable to penetrate the skin in safety.

For the purposes of quality assurance, LEONI performs checks such as dielectric tests and four-terminal measurements prior to delivery.

In addition, LEONI also supplies the cables for connecting the external system components (batteries, power supply unit, laptop) to the control unit.

The framework agreement for the hybrid wiring of the INCOR system means that Berlin Heart has now placed its long-standing successful partnership with LEONI on an even broader base.

SIEMENS Medical Solutions: MAMMOMAT Novation

Pre-assembled cable system for MAMMOMAT Novation

Cable system from LEONI for control, power supply and data transmission

When it introduced the MAMMOMAT NovationDR in 2003, SIEMENS Medical Solutions established a milestone in digital full-field mammography. The workflow-optimised complete solution offers all the necessary features in a single device, from screening, diagnosis and biopsy to the post-processing of digital images and their archiving.

From the outset, LEONI has supplied and assembled the cable system for the wiring of the entire system. This encompasses both control and power supply, as well as data transmission, which, because of the special requirements in terms of image quality, runs via a corresponding high-pressure coaxial connection. The cable harnesses, which are approved according to various AWM styles and UL standards, are produced on a fixing board designed especially for this purpose.

Comprehensive logistics service and continuous quality assurance measures, such as homologation, follow-up tests, dielectric tests and four-terminal measurements round off LEONI’s service spectrum.

In addition to the many years of successful cooperation with LEONI, the main criteria when choosing a partner to provide the wiring for the MAMMOMAT NovationDR from SIEMENS’ perspective were adherence to schedules and quality and, not least, the bundling of expertise in the areas of design, system technology, production, assembly and service.

Patient monitoring: Hybrid cable

LEONI hybrid cables

Gaining time in patient monitoring with multifunctional LEONI cable

Robust cable is used in patient monitoring to reliably transmit vital parameters. However, connecting a monitoring system to an anaesthetised, emergency or intensive-care patient should not cause the patient unnecessary stress. Rather, the cables used should assist medical staff in terms of speed and safety when connecting devices and systems. Efficient cabling can gain time, which is extremely valuable especially in emergency situations. With a hybrid solution for patient monitoring, LEONI supplies a cable that combines as many as four monitoring functions and can thereby save time.

How can LEONI, as a cable manufacturer, support medical staff and patients in terms of speed, safety and comfort during patient monitoring? Quite simple: the extreme flexibility and smooth surfaces of LEONI cables make handling of the connected electrodes and sensors user-friendly. Their high tensile strength and tread resistance means they can stand up to rough handling. Consequently, no special care has to be taken of the cables in extremely responsive situations or when being handled by patients during extended investigations. The cable's compact structure and smallest-possible outer diameter reduces weight and makes the monitoring period easier. The weight reduction provides benefits especially on portable systems.

An efficient layout of cabling through the use of customised hybrid cables is a key contribution that LEONI makes to patient monitoring. Integrated several monitoring functions in a single cable can reduce cable complexity for the entire system. The speed and safety of medical staff's actions while attaching sensors and electrodes is thereby raised and the stress to patients is diminished.

These are the objectives LEONI pursued and the company has developed a hybrid cable that can combine as many as four monitoring functions: body temperature, ECG reading, blood pressure and oxygen content of blood (SPO2) are monitored via a robust round cable with a small outer diameter. The cable's extreme flexibility meanwhile adds to user-friendliness. The smooth and shiny but non-sticky outer jacket makes the cable very skin friendly and gives it a pleasant feel. The cable is also autoclavable with up to 1000 cycles and it is FDA-approved.

During the development of LEONI cables for patient monitoring systems the focus is always on the cable's structure, its secure signal transmission thanks to optimum EMC properties as well as the use of the right materials. Along with chemical, mechanical and thermal requirements, the criteria in selecting the materials for this LEONI hybrid cable were also the aim to maximise patient comfort. The cable's outer jacket is available in various versions, which, depending on field of application and location, provide particular abrasion resistance, suitability for sterilisation or biocompatibility. LEONI specially developed some of the corresponding materials in-house.

X-ray: Cable routing system

LEONI cable routing system

LEONI develops and produces cable storage modules for mobile C-arm x-ray machines

For some years now LEONI’s Business Unit Healthcare has been supplying special cable storage modules for special C-arm x-ray machines. These modules, developed in close collaboration with the OEM, are supplied ready to install and facilitate long-lasting mechanical movement of the ray generating and detector unit.

A mobile C-arm x-ray machine is rolled into the operating theatre. An assistant grasps the device’s arms and with little effort positions the ray generator and detector above and underneath the patient. Informative x-ray images of the targeted areas of the body are displayed on the display system.

Such a scenario is replayed day in, day out in a wide variety of hospitals and doctors’ surgeries. In so doing, medical staff enjoy the wide range of orbital movement and how easy a mobile C-arm is to direct – a user benefit that is achieved thanks not least to cabling that favours freedom of movement.

For some years now, LEONI provides cable storage modules for the wiring of various mobile C-arms. What makes it special is the ready-to-install solution: with virtually no strain, the supply and data cables are fed across several rollers and reels within a module. Thanks to this intelligent cable routing and spring-loaded clamping jaws, the C-arm can be moved vibration-free and effortlessly with a force of less than 50 N.

LEONI also succeeded in reducing the number and volume of cables in the equipment with tailor-made hybrid and multifunction cables. In the upper section of the C-arm, a special power cable provides the energy to generate the x-rays. On the opposite side, efficient LEONI triax cables ensure reliable transfer of the x-ray images from the detector to the main computer. More than four dozen other cables facilitate, among other things, control as well as pressure and temperature monitoring. In some cases more than 60 single cores were housed in a round cable that makes do with a diameter of just 17 mm.

The tricky assembly of the cable storage module, which weighs about 20 kg, is handled at LEONI’s facility in Friesoythe, northern Germany. Before just-in-time delivery, every single complete system is subjected to another comprehensive technical check.

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