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Related Experiment Video

Updated: Jun 28, 2026

Noninvasive Determination of Vortex Formation Time Using Transesophageal Echocardiography During Cardiac Surgery
04:48

Noninvasive Determination of Vortex Formation Time Using Transesophageal Echocardiography During Cardiac Surgery

Published on: November 28, 2018

Can ROTEM thromboelastometry predict postoperative bleeding after cardiac surgery?

Simon J Davidson1, Donovan McGrowder, Michael Roughton

  • 1Department of Haematology, Royal Bromptom Hospital, London, UK. s.davidson@rbht.nhs.uk

Journal of Cardiothoracic and Vascular Anesthesia
|October 17, 2008
PubMed
Summary

Rotational thromboelastometry (ROTEM) has poor predictive ability for identifying patients with significant postoperative bleeding after cardiac surgery. However, ROTEM demonstrated a good negative predictive value in this study.

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Area of Science:

  • Anesthesiology
  • Cardiovascular Surgery
  • Critical Care Medicine
  • Hematology

Background:

  • Postoperative bleeding is a significant complication following cardiac surgery.
  • Accurate identification of patients at risk for excessive bleeding is crucial for timely intervention.
  • Rotational thromboelastometry (ROTEM) is a viscoelastic hemostasis analysis method.

Purpose of the Study:

  • To assess the predictive capability of ROTEM for identifying patients with bleeding exceeding 200 mL/h post-cardiac surgery.
  • To evaluate ROTEM's utility in the early postoperative period.

Main Methods:

  • Prospective observational study conducted at a single university hospital.
  • Included 58 adult patients undergoing primary coronary artery revascularization.

Related Experiment Videos

Last Updated: Jun 28, 2026

Noninvasive Determination of Vortex Formation Time Using Transesophageal Echocardiography During Cardiac Surgery
04:48

Noninvasive Determination of Vortex Formation Time Using Transesophageal Echocardiography During Cardiac Surgery

Published on: November 28, 2018

  • Blood samples analyzed preoperatively and at 1, 2, and 3 hours post-surgery.

    • Main Results:

    • Eight patients (13.8%) experienced bleeding of at least 200 mL/h.
    • All bleeding patients had at least one abnormal ROTEM result (100% sensitivity).
    • The negative predictive value of ROTEM was 100%, while the positive predictive value was 14.8%.

    Conclusions:

    • ROTEM exhibits poor predictive utility for identifying patients with significant early postoperative bleeding after cardiac surgery.
    • Despite poor positive predictive value, ROTEM demonstrated a strong negative predictive value, suggesting its utility in ruling out significant bleeding.