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.