Biomedical subjects

Joo-Heon Yoon

Publications and source records attributed to Joo-Heon Yoon.

57 records · Page 4Linked to original sources

PubMed2002

Surgical anatomy of the sphenopalatine artery in lateral nasal wall.

OBJECTIVE: We investigated the surgical anatomy of the sphenopalatine artery. First, the location of the sphenopalatine foramen on the lateral nasal wall and the pattern of the main branches of the sphenopalatine artery from the sphenopalatine artery were studied. Second, the course of the posterior lateral nasal artery with respect to the posterior wall of the maxillary sinus, the perpendicular plate of the palatine bone, and the pattern of distribution of its branches on the fontanelle was determined. Third, the distribution pattern on the inferior turbinate was analyzed. STUDY DESIGN: Fifty midsagittal sections of randomly selected Korean adult cadaver heads with intact sphenoid sinus and surrounding structures were used in the study. METHODS: The mucosa on the sphenopalatine foramen and its surrounding mucosa were removed with a microscissors, a fine forceps, and a pick to expose the sphenopalatine artery under an operating microscope (original magnification x6). RESULTS: The feeding vessels of the superior turbinate were from the septal artery in 36 cases (72%). The feeding vessels to the middle turbinate branch originated from the proximal portion of the posterior lateral nasal artery just after exiting the sphenopalatine foramen in 44 cases (88%). Some portion of the posterior lateral nasal artery ran anterior to the posterior wall of the maxillary sinus in 38%. The major feeding arteries to the fontanelle were from the inferior turbinate branch in 25 cases (50%). In most cases, the inferior turbinate branch was the end artery of the posterior lateral nasal artery (98%). CONCLUSIONS: The study provides detailed information concerning the sphenopalatine artery, which we hope will help explain the arterial bleeding that may occur during ethmoidectomy, middle meatal antrostomy, conchotomy, and endoscopic ligation of the sphenopalatine artery.

Arteries↗

PubMed2002

Treatment outcomes of primary and recurrent inverted papilloma: an analysis of 96 cases.

This series was undertaken to investigate the incidence of associated polyps and the recurrence rates of inverted papillomas with, or without, malignancies, as well as the treatment outcomes of the recurred cases. A retrospective study evaluating the pathology, associated polyps, types of operation, recurrence rate after original operation, and surgical outcomes of recurred cases was conducted upon 96 patients diagnosed with inverted papilloma. The overall malignancy rate was 11.5 per cent with synchronous tumours accounting for 9.4 per cent and metachronous for 2.1 per cent. Inflammatory polyps were found in association with inverted papilloma in 21.9 per cent. In cases without malignancies, the recurrence rate after the original conservative procedure was 33.9 per cent, compared to 14.3 per cent after a medial maxillectomy. In cases with malignancies, the recurrence rate after the original surgical procedure was 22.2 per cent. Our study indicates that more aggressive and bolder surgical resection of inverted papilloma should be undertaken as a primary treatment method, or as a treatment for recurrent cases to reduce the recurrence rate of inverted papilloma with, or without, malignancy.

Adult↗

PubMedDate not supplied

The risk of olfactory disturbance from conchal plate injury during ethmoidectomy.

BACKGROUND: Even though the olfactory function usually is improved or unchanged after ethmoidectomy, some patients complain of olfactory disturbance, which may be caused by direct injury to the olfactory nerves. However, the detailed anatomic pathway of the olfactory nerves that leave the olfactory mucosa and after going through the cribriform plate insert into the olfactory bulb is uncertain. In the studies of lateral nasal wall, we referred to the thin bone that connects the middle, superior, and supreme turbinates to the skull base as the "conchal plate." We undertook this study to determine the anatomic relation between the conchal plate and the olfactory nerve. METHODS: Ten midsagittal sections from adult cadaver head specimens were used for gross anatomy and the midportion of the conchal plate was taken and fixed in 10% formalin. The microscopic structures of the conchal plate were observed after hematoxylin and eosin staining. RESULTS: The olfactory nerves originated from the olfactory mucosa lining the middle and superior turbinates and ran upward within the bone of the conchal plate. These results suggest that the olfactory nerve may be injured inadvertently in the conchal plate during ethmoidectomy and that this injury is likely to be one of the possible causes of olfactory disturbance. CONCLUSION: We propose a possibility that injury to the conchal plate can affect olfactory function. Therefore, care should be taken to avoid damage to the conchal plate during ethmoidectomy.

Adult↗