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CompletedNCT04219579Updated Jul 1, 2022

Antithrombin III Concentrate After Liver Transplantation

An interventional study of Antithrombin III, continuous infusion and Antithrombin III, Intermittent infusion in Liver Transplant; Complications, sponsored by Seoul National University Hospital. Completed at 1 site in South Korea. Open to participants aged 18 Years to 80 Years. Per ClinicalTrials.gov, last updated 2022-07-01.

Sponsored by Seoul National University Hospital · Not applicable, Interventional, and Prevention

Phase
Not applicable
Study type
Interventional
Enrollment
130
Allocation
Randomized
Ages
18 Years to 80 Years
Sex
All
01

Study summary

This study was designed to demonstrate more effective administration method of AT-III in immediate post-liver transplantation period.

Read the detailed description

Antithrombin III(AT-III) concentrates have been used to prevent critical thrombosis in the immediate post-liver transplantation period without clear evidence regarding the optimal dose or administration scheme.

The investigators retrospectively analyzed the clinical data from the patients who received liver transplantation and developed pharmacokinetic model of AT-III in the previous research. According to this study, optimal AT-III activity level will be well-maintained with smaller dose with continuous infusion than with intermittent infusion which is widely accepted way of administration currently.

A prospective study was planned to show the more effective manner of AT-III concentrate administration after liver transplantation.

02

Conditions studied

  • Liver Transplant; Complications

Keywords

  • antithrombin III
  • liver transplantation
  • administration method
  • dosage
03

In context

Lead sponsor

Seoul National University Hospital is the lead sponsor of 1,897 studies on the registry; 273 are open to participants now.

Of its 12 completed or terminated interventional studies of FDA-regulated products, 2 (17%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 80 Years
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Scheduled operation
  • Living donor liver transplantation
  • Adult patients (>=18 years old)

Exclusion criteria

Exclusion Criteria:

  • Patients under 18 years old
  • Emergency operation
  • Deceased donor liver transplantation
05

Study design

Phase
Not applicable
Primary purpose
Prevention
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Triple (Participant, Care provider, Outcomes assessor)
Enrollment
130 participants (actual)

Study arms

  • Experimental
    Continuous infusion

    Immediately after operation, 2000 international unit (IU) of Antithrombin-III (AT-III) concentrate is loaded for 1 hour. AT-III concentrate 3000 IU is continuously infused through following 71 hours.

    Drug: Antithrombin III, continuous infusion

  • Active comparator
    Intermittent infusion

    Every 6 hours, 500 IU of AT-III concentrate is infused through 1 hour during the first 72 hours after liver transplantation.

    Drug: Antithrombin III, Intermittent infusion

Interventions

  • DrugAntithrombin III, continuous infusion

    Drug page: Antithrombin III

    Antithrombin-III is administered continuously

    Also known as: Antithrombin III, human

  • Antithrombin-III is administered intermittently

    Also known as: Antithrombin III, human

06

What researchers measure

Primary outcomes

  1. Proportion of patients within target range at postoperative 72 hours

    Proportion of patients whose AT-III activity level is within the target range (80-120%)

    Time frame: 72 hours after liver transplantation

Secondary outcomes

  1. Proportion of patients within target range at postoperative 12/24/48/84 hours

    Proportion of patients whose AT-III activity level is within the target range (80-120%)

    Time frame: 12/24/48/84 hours after liver transplantation

  2. Proportion of AT-III level values within target range

    Among the measured AT-III activity levels, proportion of the values within the target range (80-120%)

    Time frame: 12/24/48/72/84 hours after liver transplantation

  3. Time required for AT-III level value to fall within target range

    Time required for AT-III level value to fall within target range (80-120%, hours)

    Time frame: operation day ~ postoperative day 7

  4. Duration for cessation of AT-III concentrate administration

    AT-III infusion is stopped for 24 hours when AT-III plasma activity level exceeds 120%, then restarted after the value is confirmed to be less than 120%.

    Time frame: operation day ~ postoperative day 7

  5. Bleeding requiring intervention

    Bleeding requiring intervention

    Time frame: operation day ~ postoperative day 7

  6. Thrombosis event

    Hepatic artery thrombosis, portal vein thrombosis

    Time frame: operation day ~ postoperative day 7

  7. Postoperative hospital stay

    number of days from operation to discharge

    Time frame: through the hospital day, an average of 14 days

07

Study locations

1 site
  • Seoul National University Hospital
    Seoul, 03080, South Korea
08

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jul 1, 2022, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT04219579
Responsible party
Ho Geol Ryu (Professor, Seoul National University Hospital) — Principal investigator
First posted
Jan 7, 2020
Start date
Jan 3, 2020
Primary completion
Jun 28, 2022
Completion
Jun 30, 2022
Last update
Jul 1, 2022

Study contacts

Ho Geol Ryu, MD, PhD
study chair · Seoul National University Hospital

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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Studies of the drug tested here: Antithrombin III

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