Cable Assembly Elements

For medical cable devices and sub-assemblies, we begin with reviewing our customer’s deliverables and requirements.  From there, we’ll select the appropriate assembly ‘ingredients’ – the materials and components that meet the products performance, usage, environmental, and aesthetic needs.

Raw Cable Considerations

Conductor Accommodation

Depending on the mechanical and electrical performance requirements of your medical cable assembly, standard stranding, high stranding or rope-lay configurations may be selected. Common wire constructions may include:

  • Tinned Copper
  • Tin/Silver Plated Alloy
  • Tinsel (Foil lined aramid fiber)

We have capability to process wire gauges down to 38AWG, with micro-wire (>38AWG) capability in-the-works.

For medical device patient lead-wire applications that demand low triboelectric noise, we have developed proprietary wire constructions that offer both signal and mechanical performance advantages. These wire constructions are available in either copper, alloy or tinsel conductor configurations.

Shielding

EMI and RF interference can degrade signals making diagnosis difficult or even impossible for your medical cable assembly application. Effective shielding can reduce unwanted interference and reduce the amount of active filtering within your medical device.

We can share our knowledge of braided, spiral serve, foil and foil combination shielding, and assist your team in selecting the best one for your application while ensuring shields can properly be terminated and remain effective.

Cable Jacket Materials

We take into consideration appropriate and reliable medical grade, bio-compatible materials for use in cable jacket materials. Considerations such as appearance, flexibility and feel, protection of conductors, durability, cleaning, disinfection and sterilization are taken into account when assisting our customers to select the right cable jacket material. Common jacket materials include:

  • Thermoplastic Elastomer –TPE (Santoprene, Versaflex)
  • Thermoplastic Urethanes –TPU
  • Silicone
  • PVC

Ensuring your device makes the right connection

Contact Types

We’ll recommend either solder or crimp style terminations that will be built to relevant IPC-WHMA-610 & 620, J-STD-001 requirements.

Our experience includes:

  • Stamped & Rolled Contacts – Open Barrel Pins and Sockets
  • Machined Contacts – Closed Barrel Pins and Sockets
  • Insulation Displacement Terminations
  • Edge Card – Printed Circuit Board Interconnects

Connector Styles

Add additional mechanical strength to your application by molding custom strain reliefs with back-potting to enhance the function and longevity of commercial off-the-shelf (OTS) connectors.

While we consider ourselves to be ‘connector neutral’, you can take advantage of our design team to develop a unique interconnect specific to your application.

  • Push/Pull
  • Latching/Non-latching
  • Magnetic
Strategic Relationships for Custom Cable Assemblies & Connectors

Precision Insert/Over-Molding

The ClearPath Medical manufacturing team has decades of experience molding medical cable assemblies, connectors and other medical interconnect devices.  Our OEM partners value our depth of knowledge of part design, mold tool design, mold materials and molding processes.

Over-mold Materials

  • Thermoplastic Elastomers (TPE)
  • Thermoplastic Urethanes (TPU)
  • Polyvinyl Chlorides (PVC)
  • Liquid Silicone Rubber (LSR)

Injection Molded Parts

We offer capability to mold rigid components for clamshells, connector nosepieces, backshells and mating receptacles:

  • Polycarbonates (PC)
  • Polycarbonate/ABS Alloys (PC/ABS)
  • ABS
  • PBT (Valox)
  • Co-polysters
  • Delrin
  • Nylon

Mold Styles

Depending on the volume and life of your project, we may select to build tooling in either aluminum or full-hardened steel.

Leverage our common base design that can help to reduce time-to-market and tooling NRE expenses. ClearPath Medical has stock tooling to support cable yoke transitions , ECG Snaps , DIN Connectors  and more.

Optimal Environmental Performance Considerations

The following table offers guidelines as to the suitability of common cable materials based on various cleaning, disinfection and sterilization methods.

These materials are commonly used for both cable jackets and molded assemblies and will be considered when designing and manufacturing your device.

PVC TPE/TPR TPU Silicone
Cleaning &

Disinfection

Sodium Hypochlorite (bleach 10%) Good Excellent Poor Good
Isopropyl Alcohol Good Excellent Poor Excellent
Glutaral-dehyde (Cidex) Fair Excellent Good Good
Sterilization Autoclave Poor Fair/Good Poor Excellent
Gamma Excellent Excellent Excellent Excellent
Ethylene oxide (ETO) Excellent Excellent Excellent Good
VHP1 (Sterrad) Good Good Good Excellent
Paracetic Acid (Steris) Good Good/Excellent Good Good/Excellent

 1Vaporized Hydrogen Peroxide

 

We always ensure compliance to RoHS and REACH directives.

We always ensure compliance to RoHS and REACH directives.

We support a number of validation tests in house, including:

Flex Cycle Testing

Tensile Load Testing

Compression Load Testing

Mate and Un-mate Cycle testing

Chemical Withstand

(This relates to design and test for cleaning solutions: 10% bleach, 2% glutaraldehyde such as Cidex, 70 & 90% IPA, and other commonly used hospital disinfectants.)

Voltage Testing – up to 10kV dielectric withstand

Requirement-based Design and Testing

Your products will be designed and tested to meet the following specifications depending on your design project; IEC 60601 requirements for medical equipment and accessories, ANSI AAMI EC53 for ECG Leadsets and Cables and ISO-10993 for biocompatibility.