1.Pulsed tissue Doppler imaging of the left ventricular septal mitral annulus in healthy dogs.
Jihye CHOI ; Hyunwook KIM ; Junghee YOON
Journal of Veterinary Science 2013;14(1):85-90
This study evaluated pulsed TDI variables including the isovolumic time interval and duration of the major wave in a population of large healthy dogs. Longitudinal myocardial motion at the septal mitral annulus was evaluated with pulsed TDI in 45 healthy adult dogs. Maximal myocardial velocities, isovolumic time intervals, and duration of the myocardial waves were measured. The correlation between time intervals and velocity variables was also investigated. The mean maximal systolic velocity was 6.92 +/- 1.78 cm/sec, the mean early diastolic velocity (Em) was 6.58 +/- 1.81 cm/sec, the mean late diastolic velocity (Am) was 5.10 +/- 2.00 cm/sec, the mean isovolumic contraction time (IVCT) was 53.61 +/- 95.13 msec, and the mean isovolumic relaxation time (IVRT) was 26.74 +/- 57.24 msec. The early diastolic mitral inflow velocity (E)/Em ratio was 10.94 +/- 3.27 while the Em/Am ratio was 1.40 +/- 0.40. There was a negative correlation between Am duration and Am amplitude, and a positive correlation between the IVRT and Em/Am ratio (p < 0.05). The normal LV parameter using pulsed TDI method could be used as the reference range for identifying myocardial dysfunction in dogs.
Animals
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Dogs/*anatomy & histology
;
Female
;
Heart Ventricles/*ultrasonography
;
Male
;
Mitral Valve/*ultrasonography
;
Ultrasonography, Doppler, Pulsed/methods/*veterinary
2.Multidisciplinary approaches to downstaging hepatocellular carcinoma: present and future
Sang-Youn HWANG ; Hyunwook CHOI ; Wan JEON ; Ryoung-Go KIM
Journal of Liver Cancer 2024;24(2):171-177
Downstaging of hepatocellular carcinoma (HCC) is typically defined as the reduction in size or number of viable tumors through locoregional therapy (LRT), aiming to meet the established criteria for liver transplantation (LT). According to the Barcelona Clinic Liver Cancer (BCLC) staging system, a subgroup of patients with BCLC-B may benefit most from downstaging therapies. The United Network Organ Sharing downstaging protocol identifies potential candidates for downstaging by setting out ‘inclusion criteria’ and defining ‘successful downstaging.’ Additionally, the protocol considers factors related to tumor biology, such as an alphafetoprotein level <500 ng/mL after LRT. Reports indicate that successful downstaging rates following LRT are about 50%, with post- LT recurrence rates comparable to those of patients within the Milan criteria. A comprehensive multicenter US study on 10-year outcomes post-LT after downstaging showed 10-year post-LT survival and recurrence rates of 52.1% and 20.6%, respectively, for patients whose disease was downstaged; this compares to 61.5% and 13.3% for those consistently within the Milan criteria. Recently, the development of effective systemic treatments for HCC, such as immuno-oncologic agents, has provided additional opportunities for downstaging. Numerous clinical trials are exploring a multidisciplinary approach (MDA) combining LRT and systemic therapy. Although concrete evidence of the superiority of MDA for HCC downstaging is lacking, some retrospective studies and phase I and II trials have shown promising results regarding the efficacy and safety of MDA for this purpose. In this review, we will also discuss the future of MDA protocols in downstaging for improved clinical outcomes.
3.Multidisciplinary approaches to downstaging hepatocellular carcinoma: present and future
Sang-Youn HWANG ; Hyunwook CHOI ; Wan JEON ; Ryoung-Go KIM
Journal of Liver Cancer 2024;24(2):171-177
Downstaging of hepatocellular carcinoma (HCC) is typically defined as the reduction in size or number of viable tumors through locoregional therapy (LRT), aiming to meet the established criteria for liver transplantation (LT). According to the Barcelona Clinic Liver Cancer (BCLC) staging system, a subgroup of patients with BCLC-B may benefit most from downstaging therapies. The United Network Organ Sharing downstaging protocol identifies potential candidates for downstaging by setting out ‘inclusion criteria’ and defining ‘successful downstaging.’ Additionally, the protocol considers factors related to tumor biology, such as an alphafetoprotein level <500 ng/mL after LRT. Reports indicate that successful downstaging rates following LRT are about 50%, with post- LT recurrence rates comparable to those of patients within the Milan criteria. A comprehensive multicenter US study on 10-year outcomes post-LT after downstaging showed 10-year post-LT survival and recurrence rates of 52.1% and 20.6%, respectively, for patients whose disease was downstaged; this compares to 61.5% and 13.3% for those consistently within the Milan criteria. Recently, the development of effective systemic treatments for HCC, such as immuno-oncologic agents, has provided additional opportunities for downstaging. Numerous clinical trials are exploring a multidisciplinary approach (MDA) combining LRT and systemic therapy. Although concrete evidence of the superiority of MDA for HCC downstaging is lacking, some retrospective studies and phase I and II trials have shown promising results regarding the efficacy and safety of MDA for this purpose. In this review, we will also discuss the future of MDA protocols in downstaging for improved clinical outcomes.
4.Multidisciplinary approaches to downstaging hepatocellular carcinoma: present and future
Sang-Youn HWANG ; Hyunwook CHOI ; Wan JEON ; Ryoung-Go KIM
Journal of Liver Cancer 2024;24(2):171-177
Downstaging of hepatocellular carcinoma (HCC) is typically defined as the reduction in size or number of viable tumors through locoregional therapy (LRT), aiming to meet the established criteria for liver transplantation (LT). According to the Barcelona Clinic Liver Cancer (BCLC) staging system, a subgroup of patients with BCLC-B may benefit most from downstaging therapies. The United Network Organ Sharing downstaging protocol identifies potential candidates for downstaging by setting out ‘inclusion criteria’ and defining ‘successful downstaging.’ Additionally, the protocol considers factors related to tumor biology, such as an alphafetoprotein level <500 ng/mL after LRT. Reports indicate that successful downstaging rates following LRT are about 50%, with post- LT recurrence rates comparable to those of patients within the Milan criteria. A comprehensive multicenter US study on 10-year outcomes post-LT after downstaging showed 10-year post-LT survival and recurrence rates of 52.1% and 20.6%, respectively, for patients whose disease was downstaged; this compares to 61.5% and 13.3% for those consistently within the Milan criteria. Recently, the development of effective systemic treatments for HCC, such as immuno-oncologic agents, has provided additional opportunities for downstaging. Numerous clinical trials are exploring a multidisciplinary approach (MDA) combining LRT and systemic therapy. Although concrete evidence of the superiority of MDA for HCC downstaging is lacking, some retrospective studies and phase I and II trials have shown promising results regarding the efficacy and safety of MDA for this purpose. In this review, we will also discuss the future of MDA protocols in downstaging for improved clinical outcomes.
5.Multidisciplinary approaches to downstaging hepatocellular carcinoma: present and future
Sang-Youn HWANG ; Hyunwook CHOI ; Wan JEON ; Ryoung-Go KIM
Journal of Liver Cancer 2024;24(2):171-177
Downstaging of hepatocellular carcinoma (HCC) is typically defined as the reduction in size or number of viable tumors through locoregional therapy (LRT), aiming to meet the established criteria for liver transplantation (LT). According to the Barcelona Clinic Liver Cancer (BCLC) staging system, a subgroup of patients with BCLC-B may benefit most from downstaging therapies. The United Network Organ Sharing downstaging protocol identifies potential candidates for downstaging by setting out ‘inclusion criteria’ and defining ‘successful downstaging.’ Additionally, the protocol considers factors related to tumor biology, such as an alphafetoprotein level <500 ng/mL after LRT. Reports indicate that successful downstaging rates following LRT are about 50%, with post- LT recurrence rates comparable to those of patients within the Milan criteria. A comprehensive multicenter US study on 10-year outcomes post-LT after downstaging showed 10-year post-LT survival and recurrence rates of 52.1% and 20.6%, respectively, for patients whose disease was downstaged; this compares to 61.5% and 13.3% for those consistently within the Milan criteria. Recently, the development of effective systemic treatments for HCC, such as immuno-oncologic agents, has provided additional opportunities for downstaging. Numerous clinical trials are exploring a multidisciplinary approach (MDA) combining LRT and systemic therapy. Although concrete evidence of the superiority of MDA for HCC downstaging is lacking, some retrospective studies and phase I and II trials have shown promising results regarding the efficacy and safety of MDA for this purpose. In this review, we will also discuss the future of MDA protocols in downstaging for improved clinical outcomes.
6.Ultrasonographic findings of pylorogastric intussusceptions in two dogs.
Jihye CHOI ; Seoyeon KEH ; Taeeun KIM ; Jaeyoung JANG ; Hyunwook KIM ; Junghee YOON
Journal of Veterinary Science 2012;13(2):215-217
A Yorkshire terrier (case 1) and a Miniature Schnauzer (case 2) were diagnosed with pylorogastric intussusceptions (PGIs). Both cases showed acute vomiting and had previous histories of laparotomy. In case 1, the invaginated pyloric wall was thickened unevenly containing multiple hypoechoic areas and had indistinct wall layering on ultrasonography. PGI with diffuse gastric edema and necrosis was confirmed on laparotomy. The dog recovered completely after gastrectomy and a Y-U plasty. Case 2 had uniformly thickened walls of invaginated gastric pylorus with the distinct wall layering. PGI was reduced spontaneously the next day.
Animals
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Dog Diseases/pathology/surgery/*ultrasonography
;
Dogs
;
Female
;
Intussusception/surgery/ultrasonography/*veterinary
;
Pylorus/*pathology/surgery
7.Prevalence of Tinnitus and Hearing Thresholds of a Non-Noise-Exposed Population with and without Tinnitus.
Jung Wan KOO ; Won Chul LEE ; Hyunwook KIM ; Byeong Chul CHOI ; Min Hwa OH ; Chung Yill PARK
Korean Journal of Occupational and Environmental Medicine 1999;11(3):323-331
OBJECTIVES: In order to establish prevalence and characteristics of tinnitus and hearing thresholds according to tinnitus, this study was carried out. METHODS: Nine hundred and thirty two subjects, undergone human dock or general health check-up and been in college, were surveyed to the questionnaire on the general characteristics, past medical histories, life styles, subjective symptoms about hearing, taking ototoxic drugs and were conducted on the hearing thresholds by pure tone audiometry. RESULTS: Of the total population, 98 reported tinnitus, giving an overall prevalence of 10.5%, prevalence of tinnitus in the subjects with the factors infuencing hearing thresholds were 17.4 %, prevalence without the factors influencing hearing thresholds were 7.5 %. Frequency of tinnitus of the total population was the highest in 'once per several months'(39.6 %) and followed by' once per several days'(29.7 %), 'all day long'(16.5 %) and' several times per day'(14.3 %). Complaint site of tinnitus was 41.8 % in left ear or right ear 39.6 % in both ear and 18.7 % in head. The 13.6% of the total subjects complained sleep disturbance. Hearing thresholds in the subjects without the factors influencing hearing thresholds tended to increase or decrease in 20 and 30 years old according to tinnitus, but those with, tinnitus tended to increase more than chose without tinnitus in 40 and 50 years old. CONCLUSIONS: Results also provide evidence that reports of tinnitus at the time of annual audiometric testing may be useful in identifying workers at greater risk for developing significant shifts in hearing thresholds. Awareness of the possible occurrence of tinnitus may encourage worker to cooperate more actively in a company hearing conservation programme.
Adult
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Audiometry
;
Ear
;
Head
;
Hearing*
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Humans
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Life Style
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Middle Aged
;
Prevalence*
;
Questionnaires
;
Tinnitus*
8.Renal autotransplantation in open surgical repair of suprarenal abdominal aortic aneurysm.
Eun Ki MIN ; Young Hoon KIM ; Duck Jong HAN ; Youngjin HAN ; Hyunwook KWON ; Byung Hyun CHOI ; Hojong PARK ; Ji Yoon CHOI ; Tae Won KWON ; Yong Pil CHO
Annals of Surgical Treatment and Research 2015;89(1):48-50
Although the standard treatment of abdominal aortic aneurysm has shifted from open surgery to endovascular repair, open surgery has remained the standard of care for complex aneurysms involving the visceral arteries and in patients unsuitable for endovascular aneurysm repair. Postoperative renal insufficiency may occur after open surgical repair of suprarenal abdominal aortic aneurysm. Methods of minimizing renal ischemic injury include aortic cross-clamping and renal reconstruction techniques. This report describes the use of renal autotransplantation for renal reconstruction during open surgical repair of a suprarenal abdominal aortic aneurysm. This technique was successful, suggesting its feasibility for open suprarenal abdominal aortic aneurysm repair, minimizing renal ischemic injury and optimizing postoperative renal function.
Aneurysm
;
Aorta
;
Aortic Aneurysm, Abdominal*
;
Arteries
;
Autografts*
;
Humans
;
Kidney
;
Renal Insufficiency
;
Standard of Care
;
Transplantation
9.Diagnostic imaging of malignant insulinoma in a dog.
Jihye CHOI ; Seoyeon KEH ; Sungsoo KIM ; Su Hyung LEE ; Hyejin KIM ; Heeyeon CHOI ; Younji LIM ; Hyunwook KIM ; Ahyoung KIM ; Dae Yong KIM
Korean Journal of Veterinary Research 2012;52(3):205-208
Endocrine test data from a 13-year old intact female Maltese was indicative of the presence of an insulinoma, however ultrasonography identified a pancreatic mass only after 10 months after the first admission. Following identification of both pancreatic tumor and hepatic metastasis on computed tomography (CT), surgical excision of the mass was attempted. However, total excision failed because of tumor adhesion to adjacent large vessels. The pancreatic mass was monitored over the next 25 months via ultrasonography, CT, and positron emission tomography-computed tomography (PET-CT). Histopathological and immunohistochemical data confirmed the diagnosis of insulinoma with hepatic metastasis.
Animals
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Diagnostic Imaging
;
Dogs
;
Electrons
;
Female
;
Humans
;
Insulinoma
;
Neoplasm Metastasis
;
Positron-Emission Tomography
10.Radiopaque markers and hydrogram in feline alimentary lymphoma.
Jihye CHOI ; Jinsoo LEE ; Jaeyoung JANG ; Heeyeon CHOI ; Jimin SEO ; Minjung LEE ; Hyunwook KIM
Korean Journal of Veterinary Research 2012;52(2):147-151
Radiography, ultrasonography with hydrogram, and contrast studies using radiopaque markers were applied to evaluate alimentary lymphoma in two cats. The hydrogram facilitated the differentiation of pseudo-thickening from true wall thickening, and enabled an evaluation of wall layering and lymph nodes. In case 1, mechanical obstruction of the duodenum was confirmed with barium-impregnated polyethylene spheres (BIPS), a radiopaque marker; however, results obtained in case 2 were not as definitive. We expect that hydrograms and BIPS can be used as valuable alternative methods to evaluate the gastrointestinal (GI) tract although further studies in cases involving GI tumors are needed.
Animals
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Cats
;
Duodenum
;
Lymph Nodes
;
Lymphoma
;
Polyethylene