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Respiratory motion control for stereotactic and robotic liver interventions
Author(s) -
Widmann Gerlig,
Schullian Peter,
Haidu Marion,
Wiedermann Franz J,
Bale Reto
Publication year - 2010
Publication title -
the international journal of medical robotics and computer assisted surgery
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.556
H-Index - 53
eISSN - 1478-596X
pISSN - 1478-5951
DOI - 10.1002/rcs.343
Subject(s) - psychological intervention , computer science , motion (physics) , respiratory system , medicine , physical medicine and rehabilitation , artificial intelligence , psychiatry
Background Control of respiratory motion is an essential prerequisite for stereotactic computer‐assisted and robotic interventions in the liver. Methods The respiratory motion control error (RMCE) of temporary disconnections of the endotracheal tube (ETT) in anaesthetized patients has been evaluated during computer tomography (CT)‐guided liver punctures. Two arterial and portal phase contrast‐enhanced planning CTs were obtained during one ETT disconnection. After liver puncture, a native control CT was performed during a second ETT disconnection. By image fusion, the Euclidean errors of corresponding external and internal targets were calculated as baseline measures. RMCE was obtained by subtracting the Euclidean error during one ETT disconnection from the Euclidean error during two ETT disconnections. Results In 26 patients, the overall mean RMCE showed 1.98 ± 0.93 (range 0.44–4.02) mm for external targets and 1.41 ± 0.75 (range 0.46–3.18) mm for the internal targets, without significant difference in means ( p = 0.558). No complications were noted. Conclusions Temporary ETT disconnections are safe and may control respiratory motion for liver interventions within 4 mm. Copyright © 2010 John Wiley & Sons, Ltd.