Fresh Frozen Plasma (FFP) Dose
Calculate the required FFP transfusion dose based on patient weight, mL/kg dosage, and unit volume. Free medical dosing tool for clinicians managing bleeding patients.
About This Calculator
The Fresh Frozen Plasma (FFP) Dose Calculator helps clinicians quickly determine the appropriate volume of fresh frozen plasma needed for a patient requiring transfusion. This tool is designed for healthcare professionals managing bleeding patients, those with coagulation factor deficiencies, patients on warfarin requiring reversal, and individuals with conditions like thrombotic thrombocytopenic purpura (TTP) or disseminated intravascular coagulation (DIC).
The calculation follows standard transfusion medicine guidelines: total FFP dose (mL) = patient weight (kg) × prescribed dose (mL/kg). The standard therapeutic dose ranges from 10 to 20 mL/kg, with 15 mL/kg being the most commonly used target, which raises coagulation factor levels by approximately 20-30%. The number of units is then calculated by dividing the total dose by the volume per FFP unit (typically 200-300 mL) and rounding up to ensure full dose delivery.
Regional Notes
India: In India, FFP is sourced from licensed blood banks regulated by the National AIDS Control Organization (NACO) and the Drugs Controller General of India. Standard FFP units in India are typically 200-250 mL. The dose of 10-20 mL/kg is followed as per national transfusion guidelines.
US: The FDA regulates FFP in the United States. Standard FFP units are approximately 200-300 mL. The AABB (formerly American Association of Blood Banks) recommends 10-20 mL/kg dosing. FFP must be ABO-compatible, and group AB is the universal plasma donor.
UK: The UK Blood Services (NHSBT) guidelines recommend 12-15 mL/kg as the standard FFP dose, with each unit approximately 200-280 mL. FFP should be group-compatible, and all female donors of childbearing potential are screened for HLA antibodies to reduce TRALI risk.
Frequently Asked Questions
What is fresh frozen plasma (FFP) used for?
Fresh frozen plasma (FFP) is used to manage severe bleeding, replace coagulation factors in patients with hepatic insufficiency or hemophilia, reverse warfarin toxicity, treat thrombotic thrombocytopenic purpura (TTP), and prevent bleeding before surgery in coagulopathic patients. FFP contains essential clotting factors, immunoglobulins, and albumins that help restore hemostasis.
How is fresh frozen plasma dose calculated?
The fresh frozen plasma dose is calculated by multiplying the patient's weight in kilograms by the desired dose in mL/kg (typically 10-20 mL/kg). The number of units needed is then determined by dividing the total dose by the volume per unit (typically 200-300 mL per unit) and rounding up to the nearest whole unit.
What is the standard dose of fresh frozen plasma?
The standard therapeutic dose of fresh frozen plasma is 10-20 mL/kg of patient body weight, with 15 mL/kg being the most commonly used dose. This typically increases coagulation factor levels by 20-30%. For an average 70 kg adult, this translates to approximately 1,050 mL or about 4-5 units of FFP.
How long does it take to thaw fresh frozen plasma?
Fresh frozen plasma requires thawing in a water bath at 37°C (98.6°F) and typically takes about 20-30 minutes to thaw completely. Once thawed, FFP should be infused within 4 hours and cannot be refrozen. Each unit is usually infused over approximately 30 minutes.
What blood type is the universal plasma donor?
Blood group AB is the universal plasma donor because AB plasma does not contain antibodies against A or B antigens. This is different from whole blood donation where O negative is the universal donor. AB plasma can be given to patients of any blood type without risk of hemolytic reaction.
How often can you donate plasma?
You can donate plasma up to twice in a seven-day period, with at least 48 hours between donations. This is more frequent than whole blood donation because during plasmapheresis only the plasma is collected and the red blood cells and platelets are returned to the donor's body. Plasma volume regenerates within 24-48 hours.
What are the side effects of FFP transfusion?
Potential side effects of FFP transfusion include allergic reactions (urticaria, anaphylaxis), transfusion-associated circulatory overload (TACO), transfusion-related acute lung injury (TRALI), febrile non-hemolytic reactions, and risk of infection transmission. Patients should be monitored throughout the transfusion, which should not exceed 4 hours per unit.
Can FFP be used for volume expansion?
No, FFP should never be used solely for volume expansion despite plasma being the main component of blood volume. Crystalloids or colloids are preferred for volume resuscitation. FFP is indicated specifically for replacing coagulation factors, not for increasing intravascular volume. Using FFP for volume expansion exposes patients to unnecessary risks without proven benefit.