Forty eight female Sprague-Dawley rats received a subcutaneous implant containing 12.5 mg estradiol ant the age of 3 weeks. Three rats were killed in 1, 2, 3, 4, 6 weeks and in every month during 2~12 months after implantation, and the breasts were examined by light microscope. In all rats, enlargement of terminal end buds was obseved in 1~2 weeks, maximum development of hyperplastic alveolar nodules in 3 weeks, and marked dilatation and secretion of alveoli or ducts in 1~12 months after implantation. Ductal epithelial hyperplasia was observed in 27 rats and carcinomas developed in 23 rats in 2~12 months after implantation. It was thought that the changes induced by estradiol are more similar to the human breast lesions, compared with changes induced by chemical carcinogens such as dimethylbenzanthracene(DMBA), because breast carcinomas developed in close relationship with ductal epithelial hyperplasia in both estradiol-treated rats and humans, but not in DMBA-treated rats.
Female ; Humans ; Rats ; Animals ; Carcinogens

No abstract available.
Echocardiography* ; Heart Defects, Congenital* ; Hypertension*

Purpose: This study was conducted to identify the professional competency of nurses working in emergency medical institutions that use the Korean Triage Acuity Scale (KTAS), and to identify factors that affect them. Methods: This study collected data from 105 nurses working in emergency medical institutions from June to August 2020. For data analysis, descriptive analysis, t-test, ANOVA, Pearson’s correlation coefficient, and multiple regression were performed using the SPSS 25.0 program. Results: As for the professional competency in triage, the higher the self-efficacy (β = 0.58, p < .001), the more experience they have in triage-related education (β = 0.30, p < .001), 2-4 years of clinical experience in emergency department (β = 0.19, p = .002), in case of triage alone (β = 0.24, p < .001), the higher the level of education a nurse has (β = 0.19, p = .003), the higher the professional competency in triage. These variables explained professional competency in a total of 64.2% of the participants (F = 38.30, p < .001). Conclusion To improve nurses’ professional competence in triage, introducing manpower expansion, financial support, and the provision of appropriate places is suggested. In addition, it is necessary to repeatedly provide educational opportunities in an environment similar to actual clinical practice by developing various scenarios and introducing simulations and web-based formats.

PURPOSE: Femorofemoral crossover bypass (FCB) is a good procedure for patients with unilateral iliac artery disease. There are many articles about the results of FCB, but most of them were limited to 5 years follow-up. The purpose of our study was to analysis the results of FCB with a 10-year follow-up period. MATERIALS AND METHODS: Between January 1995 and December 2010, 133 patients were operated in Samsung Medical Center (median follow-up: 58.8 months). We retrospectively analysed patient characteristics, the preoperative treatment, the operative procedure, and material used. RESULTS: The indications for FCB were claudication in 110 and critical limb ischemia in 23 patients. Three patients were died due to myocardiac infarction, intracranial hemorrhage, and acute respiratory failure within 30 days after surgery. The one-year primary and secondary patency rates were 89% and 97%, the 5-year primary and secondary patency rates were 70% and 85%, and the 10-year primary and secondary patency rates were 31% and 67%. The 5-year and 10-year limb salvage rates were 97% and 95%, respectively. CONCLUSION: Our long term analysis suggests that FCB might be a valuable alternative treatment modality in patients with unilateral iliac artery disease.
Extremities ; Follow-Up Studies ; Humans ; Iliac Artery ; Infarction ; Intracranial Hemorrhages ; Ischemia ; Limb Salvage ; Respiratory Insufficiency ; Retrospective Studies ; Surgical Procedures, Operative ; Transplants* ; Vascular Patency

OBJECTIVE: The authors surveyed the prevalence and the clinical character of lumbar disc herniation (LDH) in Korean male adolescents, and the usefulness of current conscription criteria. METHODS: The data of 39,673 nineteen-year-old males that underwent a conscription examination at the Seoul Regional Korean Military Manpower Administration (MMA) from October 2010 to May 2011 were investigated. For those diagnosed as having lumbar disc herniation, prevalences, subject characteristics, herniation severities, levels of herniation, and modified Korean Oswestry low back pain disability scores by MMA physical grade were evaluated. The analysis was performed using medical certificates, medical records, medical images, and electromyographic and radiologic findings. RESULTS: The prevalence of adolescent LDH was 0.60%(237 of the 39,673 study subjects), and the prevalence of serious adolescent LDH with thecal sac compression or significant discogenic spinal stenosis was 0.28%(110 of the 39,673 study subjects). Of the 237 adolescent LDH cases, 105 (44.3%) were of single level LDH and 132 (55.7%) were of multiple level LDH, and the L4-5 level was the most severely and frequently affected. Oswestry back pain disability scores increased with herniation severity (p<0.01), and were well correlated with MMA grade. CONCLUSIONS: In this large cohort of 19-year-old Korean males, the prevalence of adolescent LDH was 0.60% and the prevalence of serious adolescent LDH, which requires management, was relatively high at 0.28%. MMA physical grade was confirmed to be a useful measure of the disability caused by LDH.
Adolescent ; Back Pain ; Cohort Studies ; Humans ; Korea ; Low Back Pain ; Male ; Medical Records ; Military Personnel ; Prevalence ; Spinal Stenosis ; Young Adult

To evaluate the coronary vasomotor tone in vasospasic angina, we compared the diameters of non-spastic segments of vasospastic group with those of control group. The internal diameters of each segment of three major coronary arteries were measured on the basal coronary angiogram, and nitroglycerin administration after provocation with ergonovine or acetylcholine. The vasospastic angina group consisted of 26 patients(20 males, 6 females, mean age of 54 years) and control group consisted of 25 patients (7 males, 18 females, mean age of 55 years). The basal coronary arterial diameters in vasospastic angina group were smaller than those in control group(p<0.05) except the distal segment of right coronary artery. The percent dilation ratio in vasospastic angina group was greater than that in control group(p<0.05). In vasospastic angina group there was no significant difference in the degree of constriction after provocation with ergonovine or acetylcholine between proximal and distal segment. These observations suggest that in vasospastic angina, basal coronary arterial tone is increased in the entire coronary arterial tree and the localized spasm may reflect local hyperrespon siveness.
Acetylcholine ; Constriction ; Coronary Vessels ; Ergonovine ; Female ; Humans ; Male ; Nitroglycerin ; Spasm

PURPOSE: There are many types of intraoperative consultations by vascular surgeons during non-vascular surgery. Therefore, we examined the current state of intraoperative consultations during non-vascular surgery in a single center. MATERIALS AND METHODS: From January 2014 to December 2015, we reviewed records of 40 patients (0.3%) who received an intraoperative consultation from a vascular surgeon for 10,734 non-vascular surgeries in Inha University Hospital. We examined patient characteristics, operative details, and clinical results. RESULTS: There were 40 intraoperative vascular surgical consultations relating to bleeding (n=14, 35.0%), dissection from the vessel (n=13, 32.5%), arterial occlusion (n=10, 25.0%), and retroperitoneal approach (n=3, 7.5%). The locations of surgery were lower extremity (n=10, 25.0%), kidney (n=8, 20.0%), spine (n=6, 15.0%), pelvis (n=6, 15.0%), head and neck (n=4, 10.0%), abdomen (n=4, 10.0%), and upper extremity (n=2, 5.0%). The methods of surgery included primary closure or ligation (n=17, 42.5%), end-to-end anastomosis (n=12, 30.0%), bypass (n=10, 25.0%), thrombectomy (n=4, 10.0%), retroperitoneal approach (n=3, 7.5%), and embolization (n=2, 5.0%). Postoperative treatment was performed in the intensive care unit for 13 patients (32.5%), while 3 patients (7.5%) died following surgery. CONCLUSION: Intraoperative consultation by vascular surgeons during non-vascular surgery occurred in approximately 0.3% of non-vascular surgeries. The region undergoing operation and type of surgery were variable. Therefore, it is necessary for vascular surgeons to have a comprehensive knowledge of vascular anatomy and to make rapid surgical decisions.
Abdomen ; Head ; Hemorrhage ; Humans ; Intensive Care Units ; Kidney ; Ligation ; Lower Extremity ; Neck ; Pelvis ; Referral and Consultation ; Spine ; Surgeons ; Thrombectomy ; Upper Extremity ; Vascular Surgical Procedures

Bone Regeneration ; Bone Substitutes ; Calcium Phosphates ; Collagen ; Collagen Type I ; Durapatite ; Electrons ; Microscopy, Electron, Scanning ; Particle Accelerators ; Photoelectron Spectroscopy ; Tail

Endovascular aneurysm repairs for a ruptured AAA (EVAR for r-AAA) have been reported with limited results although endovascular aneurysm repairs for elective AAA (EVAR for e-AAA) have shown good early and late results. In this case report, the authors described successful EVAR for r-AAA. A 93-year-old female underwent emergent EVAR for r-AAA. An aortic occlusion balloon was inserted before general anesthesia for hemodynamic stability. Zenith endograft was deployed under general anesthesia. Completion angiography showed no endoleak but there was coverage of the right renal artery. She was discharged 2 weeks after overcoming transient acute renal insufficiency. We concluded that EVAR for r-AAA can be an alternative option for the treatment of ruptured AAA.
Acute Kidney Injury ; Anesthesia, General ; Aneurysm ; Angiography ; Aortic Aneurysm, Abdominal ; Endoleak ; Female ; Hemodynamics ; Humans ; Renal Artery ; Rupture ; Stents

Buprenorphine is a semisynthetic, highly lipophilic opioid derived from thebaine and it is 30 to 40 times more potent than morphine. This study was performed to compare the clinical effects of epidural buprenorphine on postoperative pain control with those of epidural morphine in 150 cesarean deliveries. They were physical status 1 or 2 by ASA classification and randomly divided into three groups. They were administered morphine 3 mg in group I, buprenorphine 0.15 mg in group II and buprenorphine 0.3 mg in group III as first dose mixed with 0.25% bupivacaine 10 ml respectively through indwelling epidural catheter at the time of ligation of umbilical cord. Second and third doses were administered with 8 hours intervals, morphine 3 mg with N/S 10 ml was injected in group I and buprenorphine 0.15 mg with N/S 10 ml was injected in group II and III respectively. Their analgesic effects were evaluated by VAS and severity of side effects was also evaluated. The Results were as follows; 1) VAS was significantly increased in group II compared to group I and III(p<0.05). There was no significant difference between group I and III. 2) Pruritus was lesser in group II and III than group I(p<0.05). 3) There was no significant difference in nausea and vomiting. 4) None of patients had respiratory depression. The authors' findings indicate that epidural administration of buprenorphine of suitable dose may be useful in the treatment of postoperative pain.
Analgesia ; Bupivacaine ; Buprenorphine* ; Catheters ; Classification ; Humans ; Ligation ; Morphine* ; Nausea ; Pain, Postoperative ; Pruritus ; Respiratory Insufficiency ; Thebaine ; Umbilical Cord ; Vomiting