Bloodless liver resection using needle arrays under alternating electromagnetic fields

Surg Innov. 2010 Jun;17(2):95-100. doi: 10.1177/1553350610368406.


Background/aim: Hemostasis is a major difficulty associated with hepatectomies. The authors designed a new thermal surgery system to reduce blood loss.

Methods: The newly designed system consists of an alternating magnetic field generator and stainless steel needle arrays with thermosensitive bands. Lanyu pigs were used: 4 for the Kelly crushing method and 4 for the newly designed method. The procedures used were S4-S5 segmentectomies or left lateral segmentectomies, after which the amount of blood loss and operation times were compared. The pigs were observed for 4 weeks, after which liver pathologies were studied.

Results: The blood loss in the method proposed by the authors was almost 0 mL, whereas with the Kelly crushing method it was 116 +/- 35 mL. The method proposed in this study can save 15 to 25 minutes of operation time. The resected liver margins exhibited prominent apoptosis and fibrotic change in the remnant livers.

Conclusions: The method proposed is a novel new way of performing thermal surgery.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Blood Loss, Surgical / prevention & control*
  • Electromagnetic Fields
  • Hepatectomy / instrumentation*
  • Liver / pathology
  • Liver / surgery*
  • Magnetics / instrumentation*
  • Male
  • Models, Animal
  • Needles
  • Swine