QNS
Pronunciation: kyoo-en-ess
Also written as: QNS — Quantity Not Sufficient
Acronym for Quantity Not Sufficient; a specimen rejection code indicating the submitted sample volume is inadequate for the requested tests.
Full Definition
QNS is a standardised laboratory notation entered in the LIS when a specimen's volume is below the minimum required to complete the ordered test or panel. It is one of the most common grounds for specimen rejection and requires prompt notification to the requesting clinician for recollection. QNS can result from difficult venepuncture, excessive discard volumes, or incorrect tube selection. Editors should note that the acronym is rendered in full capitals ('QNS') without periods and should be accompanied by the specific tests affected when used in rejection documentation.
Usage
Usage note: Render as 'QNS' in full caps. When documenting a rejection, specify which tests were affected and the volume received versus the volume required.
In Context
- "The coagulation sample was flagged QNS, as only 1.2 mL was received in a 2.7 mL sodium citrate tube." — Laboratory specimen reception log
- "QNS rejections accounted for 34% of all haematology specimen rejections during the audit period." — Laboratory quality improvement report