[3-D navigation in laparoscopic surgery].
BACKGROUND
The main drawback with the laparoscopic approach is that the surgeon lacks the possibility to palpate vessels, tumours and organs during surgery. Furthermore, the laparoscope only provides a surface view of organs. There is a need for more advanced visualization that enhances the view to include information below the surface of the organs when the procedure is planned and for control and guidance during treatment.


METHODS
We propose 3-D navigation technology based on preoperatively acquired MR or CT data used in combination with a laparoscopic navigation pointer. The pointer has an attached position tracker which enables the surgeon to interactively control the display of images prior to and during surgery.


RESULTS
We have used this technology during treatment of four patients with adrenal tumours. Preoperative registration of images of the patients was performed within two minutes with an average accuracy of 7.1 mm. 2-D and 3-D visualizations interactively controlled by the pointer were used both for planning and for guidance of the surgical procedures.


CONCLUSIONS
The pointer was a useful tool in image guidance of laparoscopic surgery in the reported cases both for planning the approach in detail and for guidance. We believe abdominal 3-D image guidance using a laparoscopic navigation pointer has a large potential for improving laparoscopic surgery, especially in cases where vessels and anatomical relations might be difficult to identify using only a laparoscope. Accordingly, this new technology will increase safety and facilitate successful laparoscopic surgery.
Mårvik
Ronald
R
Nasjonalt senter for avansert laparoskopisk kirurgi St. Olavs Hospital.
Langø
Thomas
T
Tangen
Geir Arne
GA
Andersen
Jan O N
JO
Kaspersen
Jon H
JH
Ystgaard
Brynjulf
B
Fjösne
Hans E
HE
Fougner
Reidun
R
Hernes
Toril A Nagelhus
TA
D000310:Adrenal Gland Neoplasms / Q000601:surgery; D000315:Adrenalectomy / Q000295:instrumentation*; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000295:instrumentation*; D010535:Laparoscopy / Q000379:methods*; D025321:Surgery, Computer-Assisted / Q000295:instrumentation*