Clinical settings can wear heavily on all ultrasound equipment and the probe cables, in particular, must withstand being kinked, dragged across surfaces and stepped on, run over, disinfected continuously and routed through tight spaces-all while maintaining stable electrical signals to the ultrasound machine. If an ultrasound probe cable fails, resulting in downtime, increased costs, and expensive repairs. Modern ultrasound cable design is more durable than ever, allowing it to cope with the rigors of its environment. Here at Hotten, we've used the highest quality high-flex conductor technology, engineered and tested our probes to create the strongest and longest lasting ultrasound probe cables available.
One of the major sources of wear in an ultrasound probe cable's construction is the conductor bending in a flex movement. Coarse strands and solid conductors become work hardened through continuous flexing. Hotten utilizes high-flex ultra-fine-stranded tin-plated conductors (some of our conductor wires are as small as 0.05mm) and distributing mechanical strain across thousands of individual strands. This dramatically reduces the likelihood of individual strands becoming stressed and failing, and these cables can withstand over 10,000 continuous flex cycles and beyond before exhibiting any degradation in signal-an industry benchmark for many years of use in the clinical environment.
While shielding is essential to protect ultrasound signals from interference, the shielding used on ultrasound cables can often fail if subjected to repeated bending in exactly the same place. A solid braid shield will break, or a foil-wrap shield will develop an air gap, causing interference to enter the probe cable. At Hotten we use an advanced braided pattern combined with helically wound foil wrapping designed to maximize flex without loss of integrity-360-degree coverage is maintained even with excessive movement.
At either end of an ultrasound cable the conductor termination at the connector is the highest wear point for an ultrasound probe cable, especially if it receives frequent yanking and pulling by medical staff. Hotten employs a precision overmolding process which creates a solid transition point from the flexible cable into its connector. These solder joints and wire terminations are encapsulated in a tough, high-grade flexible polyurethane or thermoplastic elastomer, and an integral strain relief cone is formed at the base of the connector, preventing sharp bends from damaging internal conductors. This this design extends connector service life by up to 3× compared to conventional overmolded connectors.
Cleaning the ultrasound probe cable and plug after each use, often to medical grade standard, places immense stress on its cable jacket. Conventional rubber or PVC jackets can crack over time, become sticky, or even start to degrade and fail under prolonged exposure to commonly used hospital cleaning fluids and chemicals (such as isopropyl alcohol and various Chlorine based cleaners). Medical grade Polyurethane and thermoplastic polyurethane are the chosen jacket materials here at Hotten. They maintain their mechanical integrity, and offer superior chemical and abrasion resistance through thousands of disinfecting cycles.
The clinical setting can throw anything at the ultrasound probe cable, and this includes splashes and spills from various fluids, which could cause internal components to corrode. Our ultrasound probe cables are designed to meet IPX8 immersion standards. This means that the entire ultrasound probe cable connector and internal wiring assembly can be fully submerged in fluids for cleaning without damage. This is thanks to overmolded connector boots, well seated O-rings and internal blocking fillers to keep the internal electronics protected.
Moving equipment from room to room often causes ultrasound probe cables to be pinched under the wheels of equipment, or by being trapped beneath machinery. Typical plastic cable jackets can be cracked or flattened and compromise the conductors inside the ultrasound cable. We use spirally wound steel wire or Aramid fibers in a core structure to make the cable exceptionally resistant to crushing and pinching while still maintaining an industry leading level of flexibility. This significantly extends cable life in those stressful environments.
Test requirements verify all claims. All Hotten ultrasound probe cables are subject to:
Flex Testing: To provide thousands of operations equivalent to years of clinical handling with a reciprocating flex tester which runs for over 10,000 cycles.
Tensile Testing: Pull strengths verified through connector interfaces to verify proper termination.
Chemical Exposure Testing: Sample materials are tested to check for compatibility when immersed in commonly used disinfecting agents.
Temperature Cycling: To verify the cables will endure performance at extreme temperatures (-40° C to 105° C).
Signal Integrity Monitoring: Electrical characteristics tested continuously during the stress cycling to confirm no performance compromise.
The tests serve as objective evidence of the durability of Hotten cables.
Modern ultrasound probe cables are a sophisticated piece of engineering, capable of delivering incredible precision even under very demanding conditions. Our dedication to producing the toughest probes possible for a modern medical setting using high-flex conductor technology, advanced shielding and robust jacket materials will significantly lower your operational costs, reduce expensive repairs and ensuring reliable diagnostic performance and reduced operational risk.
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