ISO 14972:1998

Overview

ISO 14972:1998 defines requirements for sterile obturators for single use intended to plug the lumen of over-needle peripheral intravascular catheters. The standard covers design, sterilization, dimensional compatibility, labeling and essential manufacturer information to ensure safe, single-use obturators supplied in the sterile condition. It cross-references catheter requirements in ISO 10555-5.

Key topics and technical requirements

• Scope and definition: Specifies obturators designed to be inserted into over-needle peripheral catheters to plug the lumen.
• Sterility and sterilization: Obturators must be supplied sterile by a validated method (see ISO 11134, ISO 11135, ISO 11137 for sterilization methods).
• Biocompatibility: Devices shall be free from biological hazard; see ISO 10993-1 for appropriate test methods.
• Surface quality: External surface of the effective shaft length shall appear clean at 2.5× magnification and be free from defects to minimize vessel trauma.
• Mechanical strength (force at break): Minimum tensile force at break is specified by obturator shaft outside diameter:
  • 0.35–<0.75 mm → ≥ 3 N
  • 0.75–<1.15 mm → ≥ 5 N
  • 1.15–<1.85 mm → ≥ 8 N
  • ≥1.85 mm → ≥ 12 N
• Luer fitting: Must comply with ISO 594-1 or ISO 594-2 (Luer/conical or lock fittings).
• Dimensional compatibility: Outside diameter must match catheter inner diameter; when fully inserted, the tip must coincide with or protrude no more than 3.0 mm beyond the catheter tip.
• Color coding and radio-detectability: Obturators must use the catheter’s color code and the unit package should show the color. Radio-opacity is recommended; manufacturers may label “radio-opaque” if supported by an appropriate method.
• Manufacturer information: Required information includes product description, compatibility, manufacturer name/address, lot, expiry, sterilization method, single-use indication, storage/handling, instructions and warnings.

Applications and users

ISO 14972 is used by:

• Manufacturers of obturators and over-needle peripheral catheters for product design, testing and labeling.
• Quality assurance and regulatory teams to demonstrate compliance with medical device standards.
• Test laboratories performing tensile (force-at-break) and biocompatibility testing (Annex A provides the tensile test method).
• Procurement and clinical engineering for selecting compatible, single-use sterile obturators for vascular access kits.

Related standards

• ISO 10555-5 (over-needle peripheral catheters)
• ISO 594-1 / ISO 594-2 (Luer fittings)
• ISO 10993-1 (biological evaluation)
• ISO 11134, ISO 11135, ISO 11137 (sterilization validation)

Keywords: ISO 14972, sterile obturators, over-needle peripheral catheters, single-use obturators, Luer fitting, biocompatibility, sterilization, force at break, medical device standards.