1.Use of Reversed Iliac Leg Stent-Graft for the Treatment of Isolated Aneurysm of Internal Iliac Artery.
Kyung Sup SONG ; Hyunsil LEE ; Deok Ho NAM ; Ki Hyuk PARK ; Sang Seob YUN ; Bae Young LEE ; Kang Hoon LEE
Vascular Specialist International 2014;30(1):38-42
This is to report the technique of reversed iliac leg stent-graft in endovascular treatment for isolated internal iliac artery (IIA) aneurysm, which had significant size discrepancy between the common iliac artery (CIA) and external iliac artery (EIA) in 3 patients from different hospitals. Three patients were a 85- and two 82-year-old men. Treated were right IIA aneurysms, sized 6.5x6.2 cm, 5.0x4.0 cm, and 4.1 cm in longest diameter, respectively. The diameters of the right CIA and right EIA measured 21 mm/11 mm, 15 mm/11 mm, and 20 mm/10 mm, respectively. In all cases, reversed iliac leg stent-grafts were prepared on-site; unsheathed and mounted upside-down manually, and deployed in each right CIA. Post-stent-graft angiograms showed complete exclusion of the aneurysms, except for minimal type 1 endoleak in one case. This technique is a useful treatment option in patients with isolated IIA aneurysm.
Aged, 80 and over
;
Aneurysm*
;
Endoleak
;
Endovascular Procedures
;
Humans
;
Iliac Aneurysm
;
Iliac Artery*
;
Leg*
;
Male
2.Reconciliation of Two Cognitive Models in Obsessive-Compulsive Disorder: An fMRI Study
Seungho KIM ; Sang Won LEE ; Hyunsil CHA ; Eunji KIM ; Yongmin CHANG ; Seung Jae LEE
Psychiatry Investigation 2021;18(6):545-552
Objective:
Although cognitive models of obsessive-compulsive disorder (OCD) fall into two categories: cognitive deficit models and dysfunctional belief models, these approaches have their own ways and have hardly been reconciled. Therefore, this study aimed to investigate the potential relationships between cognitive deficit (using the Wisconsin Card Sorting Task, WCST) and dysfunctional belief (measured by scales of dysfunctional beliefs) mediated by neural activity in OCD patients.
Methods:
Thirty OCD patients and 30 healthy participants performed the WCST condition and a baseline MATCH condition during the 3T-functional magnetic resonance imaging (fMRI) acquisition.
Results:
Engagement of additional frontoparietal networks with poorer performance of WCST was found during the fMRI scan in OCD patients. Selected regions of interest from activated regions have positive relationships with dysfunctional beliefs and with the unacceptable thoughts symptom dimension in the OCD group.
Conclusion
Findings suggest that alteration in frontoparietal networks related to cognitive deficits can be associated with dysfunctional beliefs while performing conventional neurocognitive tasks and this association with dysfunctional beliefs may be pronounced in the unacceptable thoughts domain-dominant OCD patients.
3.The Neural Correlates of Positive Versus Negative Thought-action Fusion in Healthy Young Adults
Sang Won LEE ; Hyunsil CHA ; Tae Yang JANG ; Eunji KIM ; Huijin SONG ; Yongmin CHANG ; Seung Jae LEE
Clinical Psychopharmacology and Neuroscience 2021;19(4):628-639
Objective:
Thought-action fusion (TAF), one of the most-studied dysfunctional beliefs in obsessive-compulsive disorder, represents an individual’s belief that his/her thoughts directly influence events. TAF belief types are divided into personal thoughts relating to positive (positive TAF) and negative outcomes (negative TAF). However, the neural mechanisms underlying both aspects of the TAF response remain elusive.
Methods:
This functional magnetic resonance imaging study aimed to investigate the neural circuits related to positive and negative TAF and their relationships with psychological measures. Thirty-one healthy male volunteers participated in a modified TAF task wherein they were asked to read the name of a close person embedded in positive statements (PS) or negative statements (NS).
Results:
Conjunction analysis revealed activation of the fusiform and lingual gyri, midcingulate and superior medial frontal gyri, inferior orbitofrontal gyrus, and temporoparietal junction. The NS > PS comparison showed additional activation in the precuneus and medial prefrontal cortex, superior frontal gyrus, insula, globus pallidus, thalamus, and midbrain. Precuneus activity was associated with the TAF score among these areas. Moreover, activity in the inferior orbitofrontal gyrus, insula, superior, middle and medial frontal gyri, globus pallidus, inferior parietal lobule, and precuneus was associated with dimensional obsessive-compulsive scores. In contrast, the PS > NS comparison revealed no significant activation.
Conclusion
These results suggest that negative TAF, relative to positive TAF, recruits additional regions for self-referential processing, salience, and habitual responding, which may contribute to the activation of the belief that a negative thought increases the probability of that negative outcome.
4.Reconciliation of Two Cognitive Models in Obsessive-Compulsive Disorder: An fMRI Study
Seungho KIM ; Sang Won LEE ; Hyunsil CHA ; Eunji KIM ; Yongmin CHANG ; Seung Jae LEE
Psychiatry Investigation 2021;18(6):545-552
Objective:
Although cognitive models of obsessive-compulsive disorder (OCD) fall into two categories: cognitive deficit models and dysfunctional belief models, these approaches have their own ways and have hardly been reconciled. Therefore, this study aimed to investigate the potential relationships between cognitive deficit (using the Wisconsin Card Sorting Task, WCST) and dysfunctional belief (measured by scales of dysfunctional beliefs) mediated by neural activity in OCD patients.
Methods:
Thirty OCD patients and 30 healthy participants performed the WCST condition and a baseline MATCH condition during the 3T-functional magnetic resonance imaging (fMRI) acquisition.
Results:
Engagement of additional frontoparietal networks with poorer performance of WCST was found during the fMRI scan in OCD patients. Selected regions of interest from activated regions have positive relationships with dysfunctional beliefs and with the unacceptable thoughts symptom dimension in the OCD group.
Conclusion
Findings suggest that alteration in frontoparietal networks related to cognitive deficits can be associated with dysfunctional beliefs while performing conventional neurocognitive tasks and this association with dysfunctional beliefs may be pronounced in the unacceptable thoughts domain-dominant OCD patients.
5.Practical Evaluation of Engraftment and Mixed Chimerism Using PCR Amplification of a Microsatellite in the Class II Eb Gene in Murine MHC-mismatched, Nonmyeloablative Bone Marrow Transplantation.
Sang Young ROH ; Min Jung PARK ; Hyunsil PARK ; Seok Goo CHO ; So Youn MIN ; Jong Wook LEE ; Woo Sung MIN ; Chun Choo KIM ; Ho Youn KIM ; Hong Seok CHANG
Korean Journal of Hematology 2007;42(2):91-97
BACKGROUND: Although engraftment following murine allogeneic bone marrow transplantation (BMT) is most commonly confirmed by H2 typing using flow cytometry, recipient mice can be seriously injured during peripheral blood (PB) sampling. Therefore, we developed an alternative DNA-based assay that does not require the large volume of PB necessary for flow cytometry. METHODS: A minute volume of PB from the tail vein was used to evaluate the engraftment by PCR amplification of a microsatellite in the class II Eb gene. Dilution experiments were performed to evaluate the sensitivity of this assay for detecting donor cells in mixed cell populations compared with flow cytometry analysis. RESULTS: Early engraftment and mixed chimerism were confirmed, based on the length variation of the microsatellite in the class II Eb gene. The degree of donor chimerism in the donor-recipient cell mixture could be estimated semiquantitatively in a dilution experiment. The sensitivity of this assay by the naked eye approached 10% of the degree of donor chimerism. CONCLUSION: PCR amplification of a microsatellite in the class II Eb gene can be a useful alternative to flow cytometry for evaluating early engraftment and mixed chimerism following murine nonmyeloablative BMT.
Animals
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Bone Marrow Transplantation*
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Bone Marrow*
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Chimerism*
;
Flow Cytometry
;
Humans
;
Mice
;
Microsatellite Repeats*
;
Polymerase Chain Reaction*
;
Tissue Donors
;
Veins