[Application of computer land mark guide system in oto-rhino-surgery].
OBJECTIVE
To explore related issues of image-guidance system in oto-rhino-surgery application through 5 cases of ear and nose diseases.


METHODS
All operations were carried out with endoscope or microscope under the guidance of computer aided landmark system. Five patients include one fungus sphenoid sinusitis, one enormous cyst of ethmoid-frontal sinus and three congenital external meatus block.


RESULTS
Preoperative preparation time is 16-30 minutes, with an average of 27 minutes. The quotient of calibration is 1.3-2.0, with an average of 1.92. Precise error between image and entity are less than 1 mm in base of skull, mastoid; less than 1.3 mm in nasal cavity and sinuses. Operations were successfully finished without complication intraoperatively or postoperatively. The time spent on surgery with image-guidance system is as similar as that of conventional way.


CONCLUSIONS
Image-guidance system is useful for doctors to precisely recognize the mark of high dangerous area in nose, ear and surroundings, which is helpful to improve both the accusation and safety. It is one of the developing directions of microsurgery on otolaryngology field in the future.
Fourth Clinical Hospital, Suzhou University, Wuxi 214062.
Chang
C
Shu
Jia
J
Shen
Zhilin
Z
Peng
Xiao
X
Yin
D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D004431:Ear, External / Q000002:abnormalities* / Q000601:surgery*; D004724:Endoscopy / Q000379:methods; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D008866:Microsurgery / Q000379:methods; D008875:Middle Aged; D010254:Paranasal Sinus Diseases / Q000601:surgery*; D013813:Therapy, Computer-Assisted