Medical Supply Glossary: 15 Terms Canadian Clinic Buyers Misuse

Most ordering errors in Canadian clinics start with vocabulary, not pricing. Buyers treat mil and micron as the same unit, assume powder-free and latex-free mean one thing, and approve purchase orders without knowing whether a disinfectant carries a DIN or an NPN. This glossary defines 15 frequently misused procurement terms and explains, entry by entry, where each confusion actually costs money.

Quick Facts

Thickness, Barrier, and Material Terms

1. Mil vs Micron

A mil is one-thousandth of an inch, equal to 25.4 microns. North American glove specs are written in mil while imported spec sheets use microns, so a 4 mil glove (about 102 microns) can look thin next to a "100 micron" product. Buyers reject compliant product or accept undersized product because they compare figures without converting units first. Compare both numbers in one unit before awarding a contract; our 4 mil standard blue nitrile gloves are a useful benchmark for that conversion.

2. Powder-Free vs Latex-Free

Powder-free describes the absence of a donning powder coating; latex-free describes the absence of natural rubber latex. A glove can be latex-free and powdered, or latex-free and powder-free, because they are separate attributes. Using the terms interchangeably leads to wrong substitutions when a patient or clinician has a documented sensitivity, and to returns when staff expect one attribute and receive the other. Our powder-free latex-free exam gloves deliver both attributes at once.

3. Level 1/2/3 Mask

ASTM F2100 grades medical face masks into Level 1, 2, and 3 by fluid resistance, bacterial filtration efficiency, particle filtration efficiency, and differential pressure. The level is not a quality ranking; it is a test profile. Ordering Level 1 masks for splash-generating procedures is a compliance gap, while specifying Level 3 for a reception counter adds cost without adding protection for that task.

Standards Bodies and Regulatory Codes

4. ASTM vs ISO vs CSA

ASTM International writes product performance standards, ISO writes international quality and testing standards, and CSA Group writes Canadian standards that sometimes reference both. A glove meeting ASTM D6319 and a glove meeting an ISO equivalent are not automatically interchangeable until you confirm the same test methods and acceptance criteria. Quoting "ISO certified" alone tells a buyer nothing about barrier performance.

5. AAMI PB70 Levels

AAMI PB70 classifies protective gowns into Levels 1 to 4 based on barrier performance against water and blood penetration. It is separate from ASTM F2407, which covers testing and performance requirements for surgical gowns. Confusion here is expensive because a Level 1 gown used in a high-fluid procedure offers little protection, while over-ordering Level 4 for low-risk tasks inflates per-unit cost. Our Level 2 SMS isolation gowns at 40 gsm show how weight and protection are stated together.

6. DIN vs NPN

A DIN (Drug Identification Number) and an NPN (Natural Product Number) are distinct Health Canada identifiers. Disinfectants that make a drug claim require Health Canada authorization, and buyers who check only the price but not the DIN or NPN can stock product that cannot legally be sold or used as a disinfectant in Canada. Verify the identifier on every new disinfectant before it reaches a shelf.

Licensing, Packaging, and Fabric Terms

7. MDL vs MDEL

A Medical Device Licence (MDL) authorizes a specific device for sale in Canada; a Medical Device Establishment Licence (MDEL) authorizes a company to import or distribute devices. A supplier can hold an MDEL without holding an MDL for the exact product you are buying. Asking for both, correctly matched to the product, prevents stocking devices that lack the required licence.

8. 95 kPa

95 kPa refers to a pressure differential that specimen transport packaging must withstand without leaking, part of the requirements for transporting diagnostic specimens. A "95 kPa certified" bag has passed that pressure test. Using a plain bag for specimen transport risks leaks, rejected samples at the lab, and re-collection costs that dwarf the price difference between compliant and non-compliant packaging.

9. gsm

Grams per square metre (gsm) measures fabric weight, not barrier rating. A 40 gsm gown is lighter than a 60 gsm gown, but weight alone does not tell you the AAMI level, because two gowns of equal gsm can perform differently through coating and construction. Buyers who order by gsm alone sometimes trade protection for comfort without realizing it.

Inventory and Ordering Terms

10. Par Level

A par level is the minimum stock quantity that triggers a reorder before a product runs out. It is a decision point, not a purchase quantity, and it should account for lead time, usage rate, and safety stock. Setting par levels by guesswork is a common cause of both stockouts before a busy week and expiry write-offs from over-ordering slow-moving items.

11. MOQ

MOQ (minimum order quantity) is the smallest quantity a supplier will ship in one order. It is unrelated to par level, yet the two are often blended in conversation, so buyers order far more than they need to "meet par." MOQ also affects unit price: crossing a case threshold can lower per-unit cost, but only if the extra volume will be used within shelf life.

12. Lot Number

A lot number identifies the production batch of a product and is what manufacturers and Health Canada use for traceability and recalls. If a recall notice arrives and you cannot map the lot number to your receiving records, you cannot identify affected stock quickly. Recording lot numbers at receipt is a low-effort habit that turns a recall from a scramble into a checklist.

Lifecycle and Sterilization Terms

13. Shelf Life vs Expiry

Shelf life is the period a product remains within specification when stored correctly; the expiry date printed on the packaging is the end of that period under the stated conditions. They are related but not the same statement, because storing product outside recommended temperature or humidity can shorten real shelf life below the printed date. Rotation by expiry date, not receipt date, prevents waste.

14. Single-Use vs Reusable

Single-use means the item is designed and labelled to be used once and then discarded; reusable means it is designed and validated for reprocessing. Reprocessing a single-use device is not a cost-saving measure, because it removes the manufacturer's validation, can void warranty and liability coverage, and may breach facility policy. Buyers who substitute reusable items for single-use ones to cut spend often find the savings disappear into reprocessing costs and risk.

15. Class 6 vs Class 4 Indicator

Chemical indicators are grouped into categories under ISO 11140. A Class 4 indicator is multi-variable and responds to two or more critical sterilization parameters; a Class 6 indicator is an emulating indicator calibrated to a specific sterilization cycle. They are not interchangeable. Using the wrong class for your sterilizer cycle can produce a false pass, which is why Class 4 dual-indicator sterilization pouches state their class clearly on the packaging.

Frequently Asked Questions

Is a 4 mil glove thicker than a 100 micron glove?

Yes. Four mil equals roughly 102 microns, so the 4 mil glove is slightly thicker. Convert both figures into the same unit before comparing any two products.

Can a latex-free glove still be powdered?

Yes. Powder-free and latex-free are independent attributes. A nitrile or vinyl glove can carry a donning powder while remaining free of natural rubber latex.

Do disinfectant wipes need a DIN or NPN?

Disinfectants that make a drug claim require Health Canada authorization, so check for a DIN or NPN before stocking or specifying them for clinical use.

Does a higher gsm gown mean more protection?

Not on its own. gsm measures fabric weight; the AAMI PB70 level is the recognized measure of barrier performance, so read both values together.

Why does my supplier ask for a par level and an MOQ?

A par level tells you when to reorder; an MOQ tells you the smallest quantity you may purchase. One protects availability, the other sets purchasing terms, and they rarely match.

CliniEco Medical stocks the relevant products with Canadian warehouse delivery and transparent B2B pricing for Canadian facilities.

Related reading: autoclave log template — a free tool that generates the RCDSO field set and exports to CSV or print.