ISO 5837-1:1985

Overview

ISO 5837-1:1985 - "Implants for surgery - Intramedullary nailing systems - Part 1: Intramedullary nails with cloverleaf or V-shaped cross-section" specifies dimensional and fitting requirements for intramedullary nails used in bone surgery. The standard defines main and fitting dimensions (in millimetres), extracting-hook geometry, and recommended guide-wire diameters for nails with cloverleaf (multi-lobed) or V-shaped cross-sections. It also references metallic implant material standards (ISO 5832 series).

Key topics and technical requirements

• Dimensional specifications: Main and fitting dimensions and tolerances for intramedullary nails are given in detailed tables (nail diameters, cross-sectional parameters, length steps).
• Forms covered: Four principal forms are defined:
  • Form A - cloverleaf, straight
  • Form B - cloverleaf, curved
  • Form C - V-shaped cross-section
  • Form D - cloverleaf, double-ended
• Extracting hooks: Dimensions for extracting hooks compatible with cloverleaf and V-shaped nails are specified (tables for hook geometry and minimum dimensions).
• Guide-wire recommendations: Recommended guide-wire diameters corresponding to nail diameters are provided to ensure correct assembly and surgical use.
• Materials reference: Compatible metallic materials referenced from ISO 5832 (for example ISO 5832-1, ISO 5832-5, ISO 5832-7) are cited for wrought stainless steel and cobalt–chromium alloys.
• Units and tolerances: All dimensions are expressed in millimetres and include specified tolerances to ensure interchangeability and functional compatibility.

Applications and users

ISO 5837-1:1985 is relevant for:

• Orthopaedic implant manufacturers - design, production and quality control of intramedullary nails and associated extracting hooks.
• Medical device engineers - ensuring dimensional compatibility between implants, guide wires, and surgical instruments.
• Regulatory and quality assurance teams - conformity assessment, device classification, and procurement specifications.
• Hospitals and surgical centers - procurement and instrument matching to ensure implants and extraction tools are compatible.
• Test laboratories - dimensional inspection and verification against standard tables and tolerances.

Typical applications include intramedullary fixation for long-bone fractures and internal fixation procedures where cloverleaf or V-shaped nails are indicated.

Related standards

• ISO 5832 series - metallic materials for surgical implants (e.g., ISO 5832-1, ISO 5832-5, ISO 5832-7) - referenced for material selection and compatibility.
• Other parts of ISO 5837 (if applicable) - for broader intramedullary nailing system specifications.

Keywords: ISO 5837-1:1985, intramedullary nail, cloverleaf cross-section, V-shaped nail, intramedullary nailing systems, surgical implants, guide-wire diameter, extracting hook, orthopedic implant dimensions.