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Emergency Protocols & Surgery: Preparing for the Unexpected

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Patients with Factor XIII deficiency must follow the "Treat First, Scan Later" protocol for head trauma: administer factor replacement immediately before imaging, as standard clotting tests will appear normal even during a life-threatening bleed. Always carry your own factor concentrate to the ER, as hospitals rarely stock it.

Key Takeaways

  • • Standard clotting tests (PT/aPTT) appear normal in Factor XIII deficiency, often masking life-threatening bleeds in the ER.
  • • For head trauma, follow the "Treat First, Scan Later" protocol: administer factor replacement before imaging.
  • • Patients should bring their own supply of Factor XIII concentrate to the hospital, as most ERs do not stock it.
  • • Surgery requires pre-operative dosing to reach 30-50% factor levels to prevent delayed post-operative bleeding.

Because Factor XIII (FXIII) deficiency is so rare, many emergency room doctors and surgeons may have never encountered it. In an emergency, you or your child cannot rely on standard blood tests to tell the story [1]. Preparation and clear communication are life-saving tools [2][3].

The Golden Rule for Head Trauma: “Treat First, Scan Later”

The most serious risk in Factor XIII deficiency is intracranial hemorrhage (bleeding in the brain) [4][5]. If you or your child hits your head, experiences a hard fall, or shows signs of a brain bleed (like a sudden severe headache, vomiting, or vision changes), you must receive Factor XIII replacement immediately [5][6].

Do not wait for a CT scan or MRI to confirm a bleed. Because FXIII deficiency causes delayed bleeding, a scan taken right after an injury might look clear, even if a life-threatening bleed is starting [7][5]. The protocol is to give the factor first to stabilize any potential leaks, then perform the imaging [5].

Your Emergency Room “Script”

If you arrive at an ER, use these exact words to advocate for yourself:

“I have a rare bleeding disorder called Factor XIII Deficiency. My routine clotting tests (PT and aPTT) will appear NORMAL, but I am at high risk for a brain bleed. My medical protocol requires immediate factor replacement before any imaging or scans are performed.”

“Bring Your Box”

It is vital to know that most hospitals do not routinely stock Factor XIII concentrates like Corifact or Tretten. Unless you are at a major hemophilia treatment center, the hospital may have to order the medicine, which can take hours or even days.

Always bring your own supply of factor (the “box”) to the emergency room. This ensures you have the life-saving medicine you need exactly when you need it [8][9].

Preparing for Surgery

Surgery is a major stress for your blood clots. While the initial surgical cut might stop bleeding normally, the risk of delayed post-operative bleeding (occurring 24–48 hours later) is extremely high if factor levels are too low [3][10].

  • Target Levels: Before major surgery, you will need a dose to bring your levels up to 30% to 50% or higher [11][12].
  • Post-op Care: Doctors may give a second “booster” dose around Day 3 after a major procedure [11].

Essential Safety Toolkit

  1. Medical Alert ID: A bracelet or necklace that clearly states “Factor XIII Deficiency” and “Needs FXIII Concentrate” [8].
  2. ER Travel Letter: A letter from your hematologist explaining that standard tests will be normal and listing your specific emergency dose (e.g., 40 IU/kg) [2][8].
  3. Emergency Contact: Have your hematologist’s 24/7 contact information readily available for the ER staff.

Frequently Asked Questions

Will standard blood tests show if I am bleeding with Factor XIII deficiency?
Standard clotting tests like PT and aPTT will appear completely normal in patients with Factor XIII deficiency, even if you are actively bleeding. This is because these tests do not measure clot stability, which is the specific function of Factor XIII. You must inform ER staff of this immediately.
What should I do if I have Factor XIII deficiency and hit my head?
For head injuries, the "Treat First, Scan Later" rule applies. You must receive Factor XIII replacement immediately to stabilize potential bleeding before waiting for a CT scan or MRI. A scan taken too early might look clear even if a dangerous bleed is starting.
Why do I need to bring my own factor concentrate to the ER?
Most hospitals do not routinely stock Factor XIII concentrates like Corifact or Tretten. You should bring your own supply (your "box") to the emergency room to ensure you receive life-saving treatment without delay while the hospital orders more.
How should I prepare for surgery with Factor XIII deficiency?
Before major surgery, your Factor XIII levels should be raised to 30-50% or higher to prevent bleeding. Because the risk of delayed bleeding is high, you may also need a "booster" dose around the third day of recovery.
What is delayed bleeding in Factor XIII deficiency?
Delayed bleeding occurs when a clot forms initially but breaks down 24 to 48 hours later due to a lack of Factor XIII. This is a common risk after surgery or injury, meaning you must be monitored closely even if the bleeding seems to stop at first.

Questions for Your Doctor

  • • Can we create an 'ER Letter' that explains why my standard blood tests will look normal even if I am bleeding?
  • • If I hit my head, is the policy to give factor replacement immediately before I go into the CT scanner?
  • • What is the exact target Factor XIII level you want me to have before and after major surgery?
  • • Does our local emergency room definitely stock Factor XIII concentrate?
  • • In an emergency, how should the doctors monitor me for 'delayed bleeding' that might not show up for 24-48 hours?

Questions for You

  • • Is my medical alert ID easy for an EMT or ER nurse to see and understand?
  • • Do I have my hematologist's emergency contact number saved in my phone and in my ER letter?
  • • Do I have an 'emergency dose' of Factor XIII at home or in my travel bag, and does someone know how to help me get it to the hospital?

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References

  1. 1

    Acquired Factor XIII Deficiency in a 19-year-Old Male Following Ballistic Injury.

    Rodgers SC, Carter KT, Kutcher ME, Iwuchukwu CO

    The American surgeon 2022; (88(9)):2225-2226 doi:10.1177/00031348221091970.

    PMID: 35476509
  2. 2

    Hemorrhagic Shock after Neonatal Circumcision: Severe Congenital Factor XIII Deficiency.

    Cohen EL, Millikan SE, Morocco PC, de Jong JLO

    Case reports in pediatrics 2021; (2021()):5550199 doi:10.1155/2021/5550199.

    PMID: 34007504
  3. 3

    Factor XIII deficiency in the Saudi population, an underestimated bleeding risk. Review article and an illustrative case report with dental complications.

    Aljabry M

    The Saudi dental journal 2023; (35(4)):305-309 doi:10.1016/j.sdentj.2023.03.015.

    PMID: 37251713
  4. 4

    Noninvasive prenatal diagnosis of congenital factor XIII deficiency in Iran.

    Motlagh H, Dorgalaleh A, Tabibian S, et al.

    Blood coagulation & fibrinolysis : an international journal in haemostasis and thrombosis 2022; (33(3)):167-170 doi:10.1097/MBC.0000000000001121.

    PMID: 34980832
  5. 5

    Choroid Plexus Papilloma and Factor XIII Deficiency: Case Report.

    Aydin Ozturk P, Sanri O, Yilmaz A, et al.

    Pediatric neurosurgery 2018; (53(6)):413-415 doi:10.1159/000492334.

    PMID: 30176663
  6. 6

    Congenital factor XIII deficiency caused by F13A1 gene mutations presenting with intracranial hemorrhage: a case report.

    Wang H, Yang R, Li J

    Frontiers in pediatrics 2025; (13()):1732065 doi:10.3389/fped.2025.1732065.

    PMID: 41488895
  7. 7

    Delayed Postoperative Spinal Epidural Hematoma After Thoracic OPLL Surgery: A Case Report and Literature Review.

    Takei H, Ohba T, Tanaka N, et al.

    Clinical case reports 2026; (14(1)):e71810 doi:10.1002/ccr3.71810.

    PMID: 41497778
  8. 8

    Massive recurrent post-tonsillectomy bleedings revealing a transient factor XIII deficiency in a 10-year-old boy. A case report.

    Jankovic M, Choucair ML, Hallak B, et al.

    International journal of pediatrics & adolescent medicine 2019; (6(2)):55-57 doi:10.1016/j.ijpam.2019.05.006.

    PMID: 31388547
  9. 9

    [A Case of Autoimmune Acquired Factor XIII Deficiency Diagnosed from Recurrent Postoperative Bleeding].

    Takashima Y, Kawanishi H, Kotani S, et al.

    Hinyokika kiyo. Acta urologica Japonica 2023; (69(6)):169-173 doi:10.14989/ActaUrolJap_69_6_169.

    PMID: 37460281
  10. 10

    Factor XIII deficiency in south of Tunisia.

    Maaloul I, Medhaffer M, Louhichi N, et al.

    Blood coagulation & fibrinolysis : an international journal in haemostasis and thrombosis 2017; (28(6)):485-489 doi:10.1097/MBC.0000000000000649.

    PMID: 28704210
  11. 11

    A large case series on surgical outcomes in congenital factor XIII deficiency patients in Iran.

    Naderi M, Haghpanah S, Miri-Aliabad G, et al.

    Journal of thrombosis and haemostasis : JTH 2017; (15(12)):2300-2305 doi:10.1111/jth.13872.

    PMID: 29028293
  12. 12

    Management of Neuraxial Analgesia in a Parturient with Factor XIII Deficiency: A Case Report and Proposed Management Algorithm.

    Carroll DB, Myler C, Songdej N, et al.

    Case reports in anesthesiology 2020; (2020()):8892225 doi:10.1155/2020/8892225.

    PMID: 33489380

This guide outlines emergency protocols for Factor XIII deficiency for educational purposes. Always carry your personal emergency letter and consult your hematologist for your specific dosing requirements.

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