How to Read a Suture Pack Label

A suture is a configuration, not a product

The same material is supplied at many gauges, in several strand lengths, with a range of needles. Each combination is a separate item with its own catalogue number, which is why a request for “polyglactin 3-0” is not yet an order.

The label is where the configuration is written down. Read in order, it gives the material, the gauge, the length of strand in the pack, and the needle — its point geometry, its curvature and its length, usually compressed into a needle code.

Only the reference number carries all of that at once. That is what makes it the field to quote: material, gauge, length and needle each specify one dimension, and the reference specifies the item.

12345678

1. Brand and material

   PETCRYL® 910 — Polyglactin 910, Coated & Braided

   The trade name, then the polymer and construction underneath it. The material is the part that carries across manufacturers; the brand is not.

2. Reference number

   DS 2421

   The catalogue number for this exact configuration. It is the only field that specifies material, gauge, length and needle at once, which is why it is the field to quote when ordering.

3. Gauge, twice

   1 (4 Metric)

   The same thickness in two conventions — U.S.P. first, European Pharmacopoeia metric in brackets. The two run in opposite directions, so both are printed.

4. Strand length

   90 cm

   The length of thread in the pack. Nothing to do with the needle.

5. The needle

   1/2 Circle · Reverse Cutting · 40 mm

   Curvature, point geometry and needle length, with the needle itself struck alongside at scale so the curve can be checked by eye.

6. GTIN and barcode

   (01) … (17) … (10) …

   The GS1 data matrix and its human-readable pairs: product number, expiry, batch. This is what a hospital system scans.

7. Lot number

   LOT

   Identifies the batch this pack came from, not the product. A reference answers "which item"; a lot answers "which run of it" — the field a complaint or a recall works from.

8. Manufacture and expiry

   Two dated symbols

   The factory symbol dates manufacture, the hourglass dates expiry. Symbols rather than words, so the carton reads the same in every market.

Two numbering conventions in one field

Suture gauge is the field that catches people out, because the notation runs in two directions from a midpoint.

Sizes written with a zero suffix — 2-0, 3-0, 4-0, and on to 6-0 and beyond — get finer as the leading number rises. Sizes written without it — 1, 2, 3 — get thicker as the number rises.

So 6-0 is a fine strand and 2 is a heavy one, and the two are not on the same scale in the intuitive direction. The European Pharmacopoeia metric size usually appears alongside the USP size on the same label, which is often the quicker read precisely because it does not have this reversal in it.

Reference and lot answer different questions

REF identifies what the product is. Two packs with the same reference are the same configuration.

LOT identifies which manufacturing batch a particular pack came from. Two packs with the same reference will usually carry different lot numbers.

The distinction matters when something needs following up. An order or a stock query works from the reference. A traceability enquiry — anything asking about a specific batch — works from the lot. Quoting one where the other is needed is a common source of delay.

What the label does not carry

The label identifies the product and states the sterilisation method, the use-by date and the single-use marking. Symbols used for these are specified by ISO 15223-1, which is why the same hourglass and the same crossed-out figure 2 appear across manufacturers.

What the label does not carry is the clinical detail: indications, contraindications, warnings, precautions, and any strength-retention or absorption data. Those are in the instructions for use supplied with the product, and the label’s function in respect of them is to point you there.