The dynamic blood flow is regulated by the numerous complex mechanisms. Since blood flow varies directly with the radius of the vessel, blood flow is markedly affected by small changes in the caliber of the vessels. Using the hotoplethysmography, we assessed the relative changes of blood flow after topical application of the vasoactive drugs to the femoral arteries of the rabbits. It is the purpose of this study to evaluate the immediate and delayed effects of the vasoactive drugs such as epinephrine, methylergonovine, chymopapain, and lidocaine in course of time when the drugs applied topically to the vessel. 60 rabbits were divided into 6 experimental groups. In group I, the femoral artery was surgically exposed only. In Group g-A, epinephrine was applied to the femoral artery after surgical exposure. In Group Il-B, after spplication of epinephrine, the effect of epiniphrine was reversed with lidocaine. Another drugs were applied as follows methylergonovine in Group Hl-A, methylergonovine and lidocaine in Group Ill-B as in group Il-B, Chymopapain in Group lV. The relstive changes of blood flow were measured by the photoplethymograph for 3 weeks. The results are as follows ; 1. The amplitude of the photoplethysmographic wave decreased immediately after the topical application of epinephrine, methylergonovine and chymopapain. Such an effect could be observed until the 3rd week after the topical application of the drugs, 2. The delayed dffect of reducing the amplitude could be seen during the 1st week in the epinephrine and methylergonovine treated groups. However, it was seen after 1st week in the chymopapain treated group. 3. The delayed effect of epinephrine and methylergonovine could be reversed with lidocaine. 4. It seems that lidocaine can be used clinically to preyent the delayed effect of epinephrine and methylergonovine.
Blood Vessels ; Chymopapain ; Epinephrine ; Femoral Artery ; Lidocaine ; Methylergonovine ; Photoplethysmography ; Rabbits ; Radius

No abstract available.
Defense Mechanisms*

To assess the value of CT and MR in the detection of local tumor recurrence after hysterectomy, we evaluate CT and MRI findings of the vaginal stump in fifteen patients who underwent hysterectomy for uterine cervical carcinoma (N=14) or endometrial carcinoma (N=1). The presence of stump recurrence was confirmed by needle biopsy in 7 patients and by reoperation in 1 patient. The absence of stump recurrence was diagnosed by needle biopsy in 3 patitients and by clinical follow-up in 4 patients. In eight patients with vaginal stump recurrence, six patients were correctly diagnosed by CT and seven patients by MRI. In remaining seven patients who had no evidence of tumor recurrence, four patients were correctly diagnosed with CT and all the rester patients with MRI. ON the bases of our results, MRI seems to be superior to CT in the evaluation of local tumor recurrence after hysterectomy.
Biopsy, Needle ; Endometrial Neoplasms ; Female ; Follow-Up Studies ; Humans ; Hysterectomy* ; Magnetic Resonance Imaging* ; Recurrence* ; Reoperation

To assess the value of CT and MR in the detection of local tumor recurrence after hysterectomy, we evaluate CT and MRI findings of the vaginal stump in fifteen patients who underwent hysterectomy for uterine cervical carcinoma (N=14) or endometrial carcinoma (N=1). The presence of stump recurrence was confirmed by needle biopsy in 7 patients and by reoperation in 1 patient. The absence of stump recurrence was diagnosed by needle biopsy in 3 patitients and by clinical follow-up in 4 patients. In eight patients with vaginal stump recurrence, six patients were correctly diagnosed by CT and seven patients by MRI. In remaining seven patients who had no evidence of tumor recurrence, four patients were correctly diagnosed with CT and all the rester patients with MRI. ON the bases of our results, MRI seems to be superior to CT in the evaluation of local tumor recurrence after hysterectomy.
Biopsy, Needle ; Endometrial Neoplasms ; Female ; Follow-Up Studies ; Humans ; Hysterectomy* ; Magnetic Resonance Imaging* ; Recurrence* ; Reoperation

Fity-four patients with head and neck cancers were prospectively examined with the CT to determine its valuein staging cervical lymph nodes metastases and to compare with the clinical staging. The CT staging agreed withthe clinical staging in 61%(33/54), upgraded the clinical staging in 22%(12/54) and downgraded in 17%(9/54). Thepost-surgical confirmation was made in only 11 patients, The possible causes of disagreement between the CT andthe clinical staging, and the diagnostic value of the CT in the evaluation of the cervical nodes metastases werediscussed.
Head and Neck Neoplasms ; Head ; Humans ; Lymph Nodes ; Neck ; Neoplasm Metastasis ; Prospective Studies

No abstract available.
Neural Conduction*

Anomalous development of the odonteid precess is an uncommon clinical occurence that can seriously impair the integrity af the atlantoaxial articulation. Absence of the odontoid process may be either congenital or acquired, but clinically the etiology is of little importance as the clinical signs and symptoms and the treatment are identical in both. We experienced a case of congenital absence of the odontoid process and good result was obtained from the posterior atlantoaxial fusion with hale-cast.
Odontoid Process

Of 29 scoliotic patients treated by Harrington and Dwyer instrumentation, fourteen patients were taken of preoperative cnrrection by halo-femoral skeletal traction for the last two years from June 1974 to June 1976 at the Department of Orthopedic Surgery, Seoul National University Hospital. The correctability of scoliosis by the use of halo-femoral traction was evaluated with roentgenogram study and the following result was obtained. 1. Of the 14 cases, five cases were male and eight were female, and they were between the age of 13 and 29. 2. The etiology of the 14 scoliosis was idiopathic in three, paralytic in eight, congenital in one, and associated with neurofibromatosis in two. 3. The average initial curve was 108 degress with the flexibility of 32.1% on side bending. 4. The average preoperative curve with halo-femoral traction for one week was 75. 1 (30.5% correction), and the end of two week was 68 (37% correction). 5. The average immediate postoperative curve was 58.5 (46.5% correction). 6. The result of traction in the different etiologic type showes no significant difference.
Female ; Humans ; Male ; Neurofibromatoses ; Orthopedics ; Pliability ; Scoliosis ; Seoul ; Traction

To differentiate amebic and pyogenic liver abscesses, sonography(US) and CT findings of 21 amebic and 22 pyogenic liver abscesses were reviewed retrospectively. US was performed in all cases and CT in 15 cases of each group. Eleven cases of amebic abscesses had well defined margin which was observed in 10 cases of pyogenic abscessed. Amebic abscesses showed hyperechoic wall in 7 cases and calcification in 4 cases. Ten cases of pyogenic abscesses had mearby intrahepatic duct dilatation which was observed in 2 cases of amebic abscesses. Pneumobilia was seen in 6 cases of pyogenic abscesses. US findings of clear margin and hyperechoic wall, and CT findings of intrahepatic duct dilatation, pneumobilia, and calcification were helpful in differentation of amebic pyogenic liver abscesses.
Abscess ; Amebiasis ; Dilatation ; Liver Abscess, Pyogenic* ; Retrospective Studies

PURPOSE: This study describes the CT and MR findings of mucoceles occurred in the post-operative maxillary sinuses. MATERIALS AND METHODS: CT and/or MR of 19 maxillary mucoceles in 16 patients who had been operated by CaldwelI-Luc procedure were reviewed. CT scans were performed after contrast enhancement in axial and coronal planes with 5mm thickness. Three cases were studied with a 2.0 T or 0.5 T MRI, which demonstrated multi-compartment lesions. RESULTS: The lesions were bilateral in 3 cases. Compartmentalization of the antral cavity was seen in 7 out of 19 involved sinuses. Surgical bone defect of the anterior wall was the most frequent route of extension (11 cases) and extension into the infratemporal fossa with erosion of posterolateral wall was seen in 7 lesions. In 6 cases, the lesions involved orbit. The expansile and erosive bone changes were localized in every case. In one case with multi-compartment lesion, both T1- and T2-weighted MR images showed different signal intensities in each compartment which represented different protein concentration. CONCLUSION: Post-operative maxillary mucocele showed CT findings of localized erosion and bulging most frequently at the anterior wall in which the bone windows were made during the previous surgery. Post-operative compartmentalization of maxillary antrum may cause eccentric expansion of mucocete and each compartment may show different signal intensities on MR.
Humans ; Magnetic Resonance Imaging ; Maxillary Sinus* ; Mucocele* ; Orbit ; Tomography, X-Ray Computed