Use of low-dose prothrombin complex concentrate before lumbar puncture

Area of Science:

• Hematology
• Pharmacology

Background:

• Warfarin therapy necessitates careful management of International Normalized Ratio (INR) for invasive procedures.
• Elevated INR poses a significant bleeding risk during lumbar puncture, requiring timely reversal.

Observation:

• A 57-year-old male on warfarin presented with an INR >3, necessitating INR reversal for a diagnostic lumbar puncture.
• Initial attempts using multiple units of fresh frozen plasma (FFP) were insufficient and led to volume overload.
• The patient's INR remained elevated (1.9) after FFP administration, posing a risk for the lumbar puncture.

Findings:

• An off-label dose of four-factor prothrombin complex concentrate (PCC) was administered.
• PCC successfully reduced the patient's INR from 1.7 to 1.3 within 30 minutes.
• The lumbar puncture was performed without complication following PCC administration.

Implications:

• Low-dose four-factor PCC offers a viable alternative for rapid INR reversal when FFP is insufficient or contraindicated.
• This strategy can facilitate necessary diagnostic procedures in anticoagulated patients.
• Further research into optimal off-label PCC dosing for INR reversal is warranted.