ISO 5841-3:2013

Overview

ISO 5841-3:2013 - "Implants for surgery - Cardiac pacemakers - Part 3: Low-profile connectors (IS-1) for implantable pacemakers" defines the form and fit of the IS-1 connector assembly used to connect implantable pacemaker leads to pulse generators. This third-edition standard specifies essential dimensions, fit/performance requirements and type test methods (including an electrical impedance test), with the aim of enabling interchangeability of low‑profile (commonly referred to as “3.2 mm”) lead connectors and pulse generators from different manufacturers.

Key Topics and Requirements

• Scope limitation: Applicable only to connector form and fit; it does not address materials, fastening means, full functional compatibility, or overall system reliability.
• Connector assembly components: Definitions and geometry for lead connector and connector cavity (the part attached to the pulse generator).
• Sealing rings and seal zones: Each lead connector must provide sealing rings in two sealing‑ring zones to maintain electrical insulation when implanted.
• Dimensional controls: Detailed dimensional drawings specify tolerances for the lead connector and connector cavity to ensure mechanical compatibility (IS-1 physical interface).
• Mechanical performance:
  • Maximum insertion/withdrawal force for lead connector GO gauge: 14 N.
  • Gauge pin insertion force in cavity zone: ≤ 9 N.
• Electrical performance:
  • Minimum electrical impedance between conductive elements insulated by sealing rings: 50 kΩ (verification method in Annex A).
  • Annex A: describes the lead connector electrical impedance test (type/qualification test in saline, offset axis, 10-day measurement).
• Marking: Connectors and pulse generators intended to use IS-1 must be marked with the symbol “IS-1”. Unipolar connectors marked “UNI”, bipolar marked “BI”. A warning forbids IS-1 cavities on generators that can introduce dangerous non‑pacing signals via the connector.
• Tests and gauges: GO/NO‑GO style gauges and specified test methods are defined for verifying fit and force.

Applications

• Ensures interchangeability of pacemaker leads and generators across manufacturers for low‑profile IS-1 connectors.
• Used in design validation, quality assurance, and type‑approval testing of implantable pacemaker components.
• Helps hospitals, procurement teams, and clinicians understand compatibility labeling and reduce the risk of incompatible connections.

Who Should Use This Standard

• Pacemaker and lead manufacturers
• Medical device design and validation engineers
• Regulatory bodies and testing laboratories
• Clinical engineers and procurement specialists verifying device compatibility

Related Standards

• ISO 14708‑2 (Active implantable medical devices - Cardiac pacemakers) - ISO 5841‑3 supplements this standard only for components labeled as fitted with an IS‑1 connector.
• Other parts of ISO 5841 cover reporting and other pacemaker topics.

Keywords: ISO 5841-3, IS-1 connector, cardiac pacemakers, implantable pacemaker leads, low-profile connectors, connector assembly, connector cavity, lead connector, ISO 14708-2.