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Low-Dose Heparin Protocol in Type A Aortic Dissection Surgeries

Levent Mavioglu1, Mehmet Karahan1, Ertekin Utku Unal2

  • 1Department of Cardiovascular Surgery, Yuksek Ihtisas Cardiovascular Hospital, Ankara City Hospital Complex, Ankara, Turkey.

The Thoracic and Cardiovascular Surgeon
|August 16, 2022
PubMed

Insights

A low-dose heparin protocol significantly reduced postoperative bleeding and red blood cell transfusions in type A aortic dissection (TAAD) surgery compared to the standard-dose regimen. This finding suggests a safer approach for TAAD patients.

Area of Science:

  • Cardiovascular Surgery
  • Anesthesiology
  • Hematology

Background:

  • Type A aortic dissection (TAAD) is a life-threatening condition requiring complex surgical intervention.
  • Heparin administration is crucial during TAAD surgery but carries a risk of bleeding complications.
  • Optimizing heparin dosage is essential to balance anticoagulation needs with hemostasis.

Purpose of the Study:

  • To compare the efficacy and safety of standard-dose heparin (SH) versus low-dose heparin (LH) protocols in patients undergoing TAAD surgery.
  • To evaluate the impact of different heparin regimens on postoperative bleeding, reoperation rates, and blood product transfusion requirements.

Main Methods:

  • A pre- and post-implementation study involving 90 adult patients with TAAD between January 2018 and August 2021.
  • Patients were divided into two groups: SH group (before October 2019) and LH group (after November 2019).
  • Primary outcomes included postoperative bleeding volume and blood product transfusion needs; secondary outcomes included ventilation duration, ICU/hospital stay, drainage, reoperations, and mortality.

Main Results:

  • Significant differences were observed in heparin dosage and activated clotting time between the groups (p < 0.001).
  • The LH group required standard-dose heparinization in only 33.3% of cases.
  • Postoperative total drainage and red blood cell (RBC) transfusions were significantly lower in the LH group compared to the SH group (p = 0.036 and p = 0.046, respectively).

Conclusions:

  • The low-dose heparin regimen is associated with significantly reduced postoperative total drainage.
  • Low-dose heparin significantly decreases the requirement for RBC transfusions in TAAD patients.
  • This study supports the use of a low-dose heparin protocol for improved outcomes in type A aortic dissection surgery.
Abstract

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