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Jae Ho Lee 2 Articles
Correlation between nasal mucosal thickness around the lacrimal sac fossa and surgical outcomes in endonasal dacryocystorhinostomy
Jae Ho Yoo, Chang Zoo Kim, Ki Yup Nam, Seung Uk Lee, Jae Ho Lee, Sang Joon Lee
Kosin Med J. 2018;33(3):358-368.   Published online December 31, 2018
DOI: https://doi.org/10.7180/kmj.2018.33.3.358
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Abstract PDFPubReader   CrossRef-TDMCrossref - TDM
Objectives

To identify the relationship between surgical success rate and preoperative nasal mucosal thickness around the lacrimal sac fossa, as measured using computed tomography.

Methods

We reviewed 33 eyes from 27 patients who underwent endoscopic dacryocystorhinostomy after diagnosis of primary nasolacrimal duct obstruction and who were followed-up with for at least six months between 2011 and 2014. We measured preoperative nasal mucosal thickness around the bony lacrimal sac fossa using computed tomography and analyzed patient measurements after classifying them into three groups: the successfully operated group, the failed operation group, and the non-operated group.

Results

Surgery failed in six of the 33 eyes because of a granuloma at the osteotomy site and synechial formation of the nasal mucosa. The failed-surgery group showed a clinically significantly greater decrease in nasal mucosal thickness at the rearward lacrimal sac fossa compared with the successful-surgery group. However, nasal mucosal thickness of fellow eyes (i.e., non-operated eyes) was not significantly different between the two groups, and the location of the uncinate process did not appear to influence mucosal thickness. In the failed group, posteriorly located mucosal thickness of operated eye fossa was thinner than that of the non-operated eyes, but not significantly so.

Conclusions

Our results from this quantitative anatomical study suggest that nasal mucosal thickness is a predictor of endoscopic dacryocystorhinostomy results.

Relation of Various Parameters Used to Estimate Cardiac Vagal Activity and Validity of pNN50 in Anesthetized Humans
Jae Ho Lee, In Young Huh, Jae Min Lee, Hyung Kwan Lee, Il Sang Han, Ho Jun Kang
Kosin Med J. 2018;33(3):369-379.   Published online January 19, 2018
DOI: https://doi.org/10.7180/kmj.2018.33.3.369
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Abstract PDFPubReader   CrossRef-TDMCrossref - TDM
Objectives

Analysis of heart rate variability (HRV) has been used as a measure of cardiac autonomic function. According to the pNN50 statistic, the percentage of differences between successive normal RR intervals (RRI) that exceed 50 ms, has been known to reflect cardiac vagal modulation. Relatively little is known about the validity of pNN50 during general anesthesia (GA). Therefore, we evaluated the correlation of pNN50 with other variables such as HF, RMSSD, SD1 of HRV reflecting the vagal tone, and examined the validity of pNN50 in anesthetized patients. Methods: We assessed changes in RRI, pNN50, root mean square of successive differences of RRI (RMSSD), high frequency (HF) and standard deviation 1 (SD1) of Poincaré plots after GA using sevoflurane anesthesia. We also calculated the probability distributions for the family of pNNx statistics (x: 2-50 ms).

Results

All HRV variables were significantly decreased during GA. HF power was not correlated with pNN50 during GA (r = 0.096, P = 0.392). Less than pNN47 was shown to have a correlation with other variables.

Conclusions

These data suggest that pNN50 can not reflect the level of vagal tone during GA.


KMJ : Kosin Medical Journal