Increased PT Only: A Prolonged PT with a Normal PTT
Initiation of Coumadin therapy or a very low dose of Coumadin
Inadequate intake of foods rich in vitamin K, such as cauliflower, broccoli, chick peas, other leafy vegetables
A stimulus for disseminated intravascular coagulation (DIC)
Evidence of liver disease from clinical or laboratory parameters
Family history of bleeding that could be associated with factor VII deficiency
Suggested Additional Lab Testing
Get liver function tests to assess whether the patient has liver disease and decreased synthesis of coagulation factors from the liver
Get a D-dimer or FDP as an assessment of DIC
If the test is positive, follow up with platelet count and measurement of fibrinogen.
In patients with DIC, these can be decreased or show decreasing values in two consecutive specimens at least several hours apart.
If DIC, Coumadin therapy, and vitamin K deficiency have been ruled out, measure the factor VII level and assess the possibility of an isolated factor VII deficiency.
Copyright © 2017, 2013 Decision Support in Medicine, LLC. All rights reserved.
No sponsor or advertiser has participated in, approved or paid for the content provided by Decision Support in Medicine LLC. The Licensed Content is the property of and copyrighted by DSM.
Sign Up for Free e-newsletters
Psychiatry Advisor Articles
- Transference in the Age of #MeToo: What Counts as Harassment From a Patient?
- Should Physicians Treat Family and Friends? Three Experts Weigh In
- Influence of Psychostimulants on BMI and Height in Youth With ADHD
- Dialectical Behavior Therapy Effective in Reducing Suicide Attempts, Self-Harm in Adolescents
- Medication Adherence Predictors in Patients With Severe Psychiatric Disorders
- Court-Mandated Substance Abuse Treatment: Exploring the Ethics and Efficacy
- ADHD Treatments
- Esketamine Nasal Spray: A New Treatment Possibility for Treatment-Resistant Depression
- Pharmacogenetics in Psychiatry: Promising Developments and Potential Pitfalls
- Substance Abuse and Primary Psychosis: A Closer Look
- Functional Restoration for Chronic Pain and Depression in the Elderly: Pharmacotherapy and Beyond
- Efficacy of Long-Acting Injectable Antipsychotics vs Oral Antipsychotics
- Older Age Associated With Worse Major Depressive Disorder Outcomes
- Preoperative Psychiatric Diagnoses Not Associated With Bariatric Surgery Outcomes
- Medical Clearance of Psych Patients in the ED: Consensus Recommendations