The feasibility of multi-slice spiral CT in awaken patients with OSAHS / 中国现代医生

Objective To explore the clinical value of spiral CT airway measurements on awake patients under OSAHS discussed. Methods The upper airway of 104 patients with OSAHS diagnosed with polysomnography (PSG) and 25 nor-mal controls were examined and compared. The cross-sectional areas, diameters, and the thickness of the pharyngeal wall of retropalate, lingua regions planes were scanned by MSCT scan in the waking state. Results The cross-section areas of upper airway of OSAHS were significantly smaller than those of the control group, the difference was significant (P<0.05). The cross-section areas decreased and the thickness of pharyngeal walls increased with the increase of severity of OSAHS. Conclusion Patients with OSAHS has upper airway anatomic strictures. MSCT scan can effectively localize the obstructed site and degree of upper airway accurately.

Evaluation of upper airway obstruction site in OSAHS by apneagraph and spiral CT / 中国现代医生

Objective To evaluate the clinical value of Apneagraph(AG200)and CT scan in diagnosing obstructive sleep apnea hypopnea syndrome(OSAHS). Methods Twenty-two moderate and 18 severe obstructive sleep apnea hypopnea syndrome(OSAHS) patients diagnosed by polysomnography(PSG) performed one-night pressure monitoring by Apnea-graph, the apnea hypopnea index (AHI),the site of upper airway callapse and the obstructive proportion of different level. The cross-sectional areas of the pharyngeal wall of retropalate, lingua regions planes were scanned by MSCT scan in the waking state were analyzed. The obstruction levels determined by pressure monitored and found in CT screening were compared. Results Apneagraph and CT scan had good performance in the diagnosis of OSAHS. There was no difference between two methods(P>0.05).Conclusion Apneagraph and CT scan can serve as a useful device to diagnose OSAHS.The diagnostic rate of OSAHS (especially severe OSAHS)can be elevated by combining Apneagraph and CT scan.

Three-dimensional reconstruction of the optic canal-based on multislice helical CT: a comparison analysis with skull dissection of 40 postmortem cases.

Decompression operation of the optic canal via the nasal path under endoscope is widely used, but it is both a challenging and controversial method. Unsatisfactory results were largely associated with otolaryngologists' limited understanding of the real anatomical situations of the optic canal before operation. To provide otolaryngologists with the real situations and data preoperation, multislice helical CT was used to reconstruct the images of the optic canal. Using multislice helical CT-aided three-dimensional reconstructive methods in combination with direct anatomic measurement, we dissected and analyzed the shape of the optic canal and its anatomic relationship with the adjoining structures in 40 intact postmortem skull samples. The In-Space technique clearly showed the structure and the related region of the optic canal. The virtual endoscopy technique showed superbly the spatial appearance and topography of the inner optic canal and also gave the inner structure of the optic canal optically. There was no statistic difference in three-dimensional reconstructive data with that obtained by anatomical measurements and thus can be used to directly instruct the clinic operation. These results demonstrate that a combined In-Space technique with virtual endoscopy can accurately define the subtle structure and the related region of the optical canal. In conclusion, multislice helical CT-based three-dimensional reconstruction is of important value for clinical operations.