Purser Wellness approved rule
Unit: seconds
Male: 11-14
Female: 11-14
How to read this marker
Reagent-specific. Interpret with INR, liver function, vitamin K, and anticoagulants.
The wider testing context
Reference intervals below apply to patients not receiving anticoagulants. Medication-specific therapeutic ranges must be handled separately.
Using this reference
This is the approved adult, nonpregnant baseline unless the rule explicitly states otherwise. Keep the performing laboratory’s reference interval separate from this Purser Wellness rule. Match units and review the specimen, method, timing, medicines and relevant clinical context before interpreting a result. These pages do not calculate a personal high/low status or prescribe treatment.
A question to bring to your visit
Which parts of the Prothrombin time (PT) rule apply to my report’s method, units and collection conditions, and what other findings should we review alongside it?
Approved by Dr. Daniel Purser, MD · PW-LABS-1.0. The source laboratory’s interval remains separate.
Names you may see
Prothrombin time (PT) · PT · Prothrombin time