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Related Experiment Videos

The thrombo-embolic risk in surgery.

R Hoffmann1

  • 1Department of Surgery, University Hospital, Zürich, Switzerland.

Hepato-Gastroenterology
|August 1, 1991
PubMed
Summary

Postoperative deep-vein thrombosis poses risks like pulmonary embolism and postthrombotic syndrome. Liquid Crystal Contact Thermography is recommended as a non-invasive screening tool for early detection.

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Area of Science:

  • Vascular Surgery
  • Diagnostic Imaging
  • Thrombosis Research

Background:

  • Postoperative deep-vein thrombosis (DVT) can lead to fatal pulmonary embolism and debilitating postthrombotic syndrome.
  • Risk factors include patient characteristics (age, obesity) and surgical factors (duration, anesthesia type).
  • Existing diagnostic methods have limitations, necessitating improved screening tools.

Purpose of the Study:

  • To evaluate Liquid Crystal Contact Thermography (LCCT) as a non-invasive screening method for DVT.
  • To compare the efficacy of LCCT with established diagnostic techniques.
  • To highlight the importance of thrombo-embolic prophylaxis in surgical patients.

Main Methods:

  • The study reviewed data on DVT incidence after general and specific surgeries (abdominal, hip).
  • Liquid Crystal Contact Thermography was assessed for its sensitivity and specificity.
  • Heparin use in thrombo-embolic prophylaxis was also considered.

Main Results:

  • DVT incidence without prophylaxis can be as high as 30% in patients over 40 after general surgery.
  • LCCT demonstrated a high sensitivity (94%) and specificity (>80%) for DVT diagnosis.
  • Only 10% of detected DVTs are clinically apparent, underscoring the need for screening.

Conclusions:

  • Liquid Crystal Contact Thermography is a highly sensitive and specific non-invasive screening method for DVT.
  • Early detection and prophylaxis are crucial for managing postoperative thrombo-embolic complications.
  • Further research into optimal screening and prophylaxis strategies is warranted.

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