1.Image fusion technique using flat panel detector rotational angiography for transvenous embolization of intracranial dural arteriovenous fistula
Jai Ho CHOI ; Yong Sam SHIN ; Bum-soo KIM
Journal of Cerebrovascular and Endovascular Neurosurgery 2023;25(3):253-259
Precise evaluation of the feeders, fistulous points, and draining veins plays a key role for successful embolization of intracranial dural arteriovenous fistulas (DAVF). Digital subtraction angiography (DSA) is a gold standard diagnostic tool to assess the exact angioarchitecture of DAVFs. With the advent of new image postprocessing techniques, we lately have been able to apply image fusion techniques with two different image sets obtained with flat panel detector rotational angiography. This new technique can provide additional and better pretherapeutic information of DAVFs over the conventional 2D and 3D angiographies. In addition, it can be used during the endovascular treatment to help the accurate and precise navigation of the microcatheter and microguidwire inside the vessels and identify the proper location of microcatheter in the targeted shunting pouch. In this study, we briefly review the process of an image fusion technique and introduce our clinical application for treating DAVFs, especially focused on the transvenous embolization.
2.Low-Dose Three-Dimensional Rotational Angiography for Evaluating Intracranial Aneurysms: Analysis of Image Quality and Radiation Dose
Hee Jong KI ; Bum-soo KIM ; Jun-Ki KIM ; Jai Ho CHOI ; Yong Sam SHIN ; Yangsean CHOI ; Na-Young SHIN ; Jinhee JANG ; Kook-jin AHN
Korean Journal of Radiology 2022;23(2):256-263
Objective:
This study aimed to evaluate the image quality and dose reduction of low-dose three-dimensional (3D) rotational angiography (RA) for evaluating intracranial aneurysms.
Materials and Methods:
We retrospectively evaluated the clinical data and 3D RA datasets obtained from 146 prospectively registered patients (male:female, 46:100; median age, 58 years; range, 19–81 years). The subjective image quality of 79 examinations obtained from a conventional method and 67 examinations obtained from a low-dose (5-seconds and 0.10-μGy/frame) method was assessed by two neurointerventionists using a 3-point scale for four evaluation criteria. The total image quality score was then obtained as the average of the four scores. The image quality scores were compared between the two methods using a noninferiority statistical testing, with a margin of -0.2 (i.e., score of low-dose group – score of conventional group). For the evaluation of dose reduction, dose-area product (DAP) and air kerma (AK) were analyzed and compared between the two groups.
Results:
The mean total image quality score ± standard deviation of the 3D RA was 2.97 ± 0.17 by reader 1 and 2.95 ± 0.20 by reader 2 for conventional group and 2.92 ± 0.30 and 2.95 ± 0.22, respectively, for low-dose group. The image quality of the 3D RA in the low-dose group was not inferior to that of the conventional group according to the total image quality score as well as individual scores for the four criteria in both readers. The mean DAP and AK per rotation were 5.87 Gy-cm2 and 0.56 Gy, respectively, in the conventional group, and 1.32 Gy-cm2 (p < 0.001) and 0.17 Gy (p < 0.001), respectively, in the low-dose group.
Conclusion
Low-dose 3D RA was not inferior in image quality and reduced the radiation dose by 70%–77% compared to the conventional 3D RA in evaluating intracranial aneurysms.
3.Low-Dose 3D Rotational Angiography in Measuring the Size of Intracranial Aneurysm: In Vitro Feasibility Study Using Aneurysm Phantom
Hee Jong KI ; Bum-soo KIM ; Jun-Ki KIM ; Jai Ho CHOI ; Yong Sam SHIN ; Yangsean CHOI ; Na-Young SHIN ; Jinhee JANG ; Kook-jin AHN
Neurointervention 2021;16(1):59-63
Purpose:
Three-dimensional (3D) measurement of intracranial aneurysms is important in planning endovascular treatment, and 3D rotational angiography (RA) is effective in accurate measurement. The purpose of this study was to evaluate the feasibility of low dose 3D RA (5 seconds 0.10 μGy/frame) in measuring an intracranial aneurysm using an in vitro phantom.
Materials and Methods:
We investigated an in vitro 3D phantom of an intracranial aneurysm with 10 acquisitions of 3D RA with a conventional dose (5 seconds 0.36 μGy/frame) and 10 acquisitions with a low-dose (5 seconds 0.10 μGy/frame). 3D size and neck diameters of the aneurysm were measured and compared between the 2 groups (conventional and low-dose) using noninferiority statistics.
Results:
The aneurysm measurements were well-correlated between the 2 readers, and noninferiority in the measurement of aneurysmal size of low-dose 3D RA was demonstrated, as the upper margin of the 1-sided 97.5% confidence interval did not cross the pre-defined noninferiority margin of 0.2 mm by the 2 readers.
Conclusion
Low-dose (5 seconds 0.10 μGy/frame) cerebral 3D RA is technically feasible and not inferior in in vitro 3D measurement of an intracranial aneurysm. Thus, low-dose 3D RA is promising and needs further evaluation for its clinical utility in the planning of endovascular treatment of an intracranial aneurysm.
4.Treatment outcome after coiling or clipping for elderly patients with unruptured intracranial aneurysms
Woo Cheul CHO ; Yong Sam SHIN ; Bum-soo KIM ; Jai Ho CHOI
Journal of Cerebrovascular and Endovascular Neurosurgery 2020;22(2):78-84
Objective:
The purpose of this study was to analyze treatment outcomes according to treatment modality for elderly patients over 75 years with unruptured intracranial aneurysm.
Methods:
Fifty-four elderly patients treated in a single tertiary institute between January 2010 and December 2018 were retrospectively reviewed. We compared clinical outcome, radiological results, and complications between the coiling and clipping groups.
Results:
A total of 55 procedures were performed in 54 patients. Of 55 aneurysms, 44 were treated endovascularly and 11 were treated surgically. There was no significant difference in patient baseline characteristics including mean age, sex, and preexisting co-morbidity between the two groups. Even though there was no significant difference (p=0.373), procedure-related symptomatic complication occurred only in coiling group (3 out of 44 patients, 6.6%). Mortality rate was significantly higher in clipping group (1 out of 11 patients, 9.1%) than in coiling group (0%, p=0.044). Good clinical outcome (modified Rankin Scale 0-2) at 90 days was achieved in 43 cases treated with coiling (97.7%), and 10 cases with clipping (90.9%, p=0.154).
Conclusions
Clipping is more invasive procedure and takes longer operation time, which might lead to unpredictable mortality in elderly patients. Coiling might have high procedure-related stroke rate due to tortuous vessels with atherosclerosis. Therefore, aggressive treatment of elderly patients should be carefully considered based on patient’s medical condition and angiographic findings.
5.Value of Serum Cystatin C Measurement in the Diagnosis of Sepsis-Induced Kidney Injury and Prediction of Renal Function Recovery.
Ah Young LEEM ; Moo Suk PARK ; Byung Hoon PARK ; Won Jai JUNG ; Kyung Soo CHUNG ; Song Yee KIM ; Eun Young KIM ; Ji Ye JUNG ; Young Ae KANG ; Young Sam KIM ; Se Kyu KIM ; Joon CHANG ; Joo Han SONG
Yonsei Medical Journal 2017;58(3):604-612
PURPOSE: Acute kidney injury (AKI) is common in critically ill patients. Serum cystatin C has emerged as a reliable marker of AKI. We sought to assess the value of serum cystatin C for early detection and prediction of renal function recovery in patients with sepsis. MATERIALS AND METHODS: Sepsis patients (113 AKI patients and 49 non-AKI patients) admitted to the intensive care unit (ICU) were included. Serum creatinine and cystatin C levels and glomerular filtration rate were measured on days 0, 1, 3, and 7. RESULTS: Serum cystatin C levels were significantly higher in AKI patients than in non-AKI patients at all time points. Multivariate analysis showed that only serum cystatin C levels on day 0 were associated with AKI development [odds ratio (OR)=19.30; 95% confidence interval (CI)= 2.58–144.50, p<0.001]. Linear mixed model analysis showed significant variation in cystatin C levels between the recovery and non-recovery groups over time (p=0.001). High levels of serum cystatin C at day 0 (OR=1.64; 95% CI=1.00–2.68, p=0.048) were associated with recovery of AKI. CONCLUSION: Serum cystatin C level was found to be associated with the development and worsening of AKI in ICU patients with sepsis.
Acute Kidney Injury
;
Creatinine
;
Critical Illness
;
Cystatin C*
;
Diagnosis*
;
Glomerular Filtration Rate
;
Humans
;
Intensive Care Units
;
Kidney*
;
Multivariate Analysis
;
Recovery of Function*
;
Sepsis
6.Implications of Plasma Renin Activity and Plasma Aldosterone Concentration in Critically Ill Patients with Septic Shock.
Kyung Soo CHUNG ; Joo Han SONG ; Won Jai JUNG ; Young Sam KIM ; Se Kyu KIM ; Joon CHANG ; Moo Suk PARK
Korean Journal of Critical Care Medicine 2017;32(2):142-153
BACKGROUND: The renin-angiotensin-aldosterone system is closely associated with volume status and vascular tone in septic shock. The present study aimed to assess whether plasma renin activity (PRA) and plasma aldosterone concentration (PAC) measurements compared with conventional severity indicators are associated with mortality in patients with septic shock. METHODS: We evaluated 105 patients who were admitted for septic shock. Plasma levels of the biomarkers PRA and PAC, the PAC/PRA ratio, C-reactive protein (CRP) level, and cortisol level on days 1, 3, and 7 were serially measured. During the intensive care unit stay, relevant clinical information and laboratory results were recorded. RESULTS: Patients were divided into two groups according to 28-day mortality: survivors (n = 59) and non-survivors (n = 46). The survivor group showed lower PRA, PAC, Acute Physiologic and Chronic Health Evaluation (APACHE) II score, and Sequential Organ Failure Assessment (SOFA) score than did the non-survivor group (all P < 0.05). The SOFA score was positively correlated with PRA (r = 0.373, P < 0.001) and PAC (r = 0.316, P = 0.001). According to receiver operating characteristic analysis, the areas under the curve of PRA and PAC to predict 28-day mortality were 0.69 (95% confidence interval [CI], 0.58 to 0.79; P = 0.001) and 0.67 (95% CI, 0.56 to 0.77; P = 0.003), respectively, similar to the APACHE II scores and SOFA scores. In particular, the group with PRA value ≥3.5 ng ml⁻¹ h⁻¹ on day 1 showed significantly greater mortality than did the group with PRA value <3.5 ng ml⁻¹ h⁻¹ (log-rank test, P < 0.001). According to multivariate analysis, SOFA score (hazard ratio, 1.11; 95% CI, 1.01 to 1.22), PRA value ≥3.5 ng ml⁻¹ h⁻¹ (hazard ratio, 3.25; 95% CI, 1.60 to 6.60), previous history of cancer (hazard ratio, 3.44; 95% CI, 1.72 to 6.90), and coronary arterial occlusive disease (hazard ratio, 2.99; 95% CI, 1.26 to 7.08) were predictors of 28-day mortality. CONCLUSIONS: Elevated PRA is a useful biomarker to stratify the risk of critically ill patients with septic shock and is a prognostic predictor of 28-day mortality.
Aldosterone*
;
APACHE
;
Arterial Occlusive Diseases
;
Biomarkers
;
C-Reactive Protein
;
Critical Illness*
;
Humans
;
Hydrocortisone
;
Intensive Care Units
;
Mortality
;
Multivariate Analysis
;
Plasma*
;
Renin*
;
Renin-Angiotensin System
;
ROC Curve
;
Shock, Septic*
;
Survivors
7.Implications of Plasma Renin Activity and Plasma Aldosterone Concentration in Critically Ill Patients with Septic Shock
Kyung Soo CHUNG ; Joo Han SONG ; Won Jai JUNG ; Young Sam KIM ; Se Kyu KIM ; Joon CHANG ; Moo Suk PARK
The Korean Journal of Critical Care Medicine 2017;32(2):142-153
BACKGROUND: The renin-angiotensin-aldosterone system is closely associated with volume status and vascular tone in septic shock. The present study aimed to assess whether plasma renin activity (PRA) and plasma aldosterone concentration (PAC) measurements compared with conventional severity indicators are associated with mortality in patients with septic shock. METHODS: We evaluated 105 patients who were admitted for septic shock. Plasma levels of the biomarkers PRA and PAC, the PAC/PRA ratio, C-reactive protein (CRP) level, and cortisol level on days 1, 3, and 7 were serially measured. During the intensive care unit stay, relevant clinical information and laboratory results were recorded. RESULTS: Patients were divided into two groups according to 28-day mortality: survivors (n = 59) and non-survivors (n = 46). The survivor group showed lower PRA, PAC, Acute Physiologic and Chronic Health Evaluation (APACHE) II score, and Sequential Organ Failure Assessment (SOFA) score than did the non-survivor group (all P < 0.05). The SOFA score was positively correlated with PRA (r = 0.373, P < 0.001) and PAC (r = 0.316, P = 0.001). According to receiver operating characteristic analysis, the areas under the curve of PRA and PAC to predict 28-day mortality were 0.69 (95% confidence interval [CI], 0.58 to 0.79; P = 0.001) and 0.67 (95% CI, 0.56 to 0.77; P = 0.003), respectively, similar to the APACHE II scores and SOFA scores. In particular, the group with PRA value ≥3.5 ng ml⁻¹ h⁻¹ on day 1 showed significantly greater mortality than did the group with PRA value <3.5 ng ml⁻¹ h⁻¹ (log-rank test, P < 0.001). According to multivariate analysis, SOFA score (hazard ratio, 1.11; 95% CI, 1.01 to 1.22), PRA value ≥3.5 ng ml⁻¹ h⁻¹ (hazard ratio, 3.25; 95% CI, 1.60 to 6.60), previous history of cancer (hazard ratio, 3.44; 95% CI, 1.72 to 6.90), and coronary arterial occlusive disease (hazard ratio, 2.99; 95% CI, 1.26 to 7.08) were predictors of 28-day mortality. CONCLUSIONS: Elevated PRA is a useful biomarker to stratify the risk of critically ill patients with septic shock and is a prognostic predictor of 28-day mortality.
Aldosterone
;
APACHE
;
Arterial Occlusive Diseases
;
Biomarkers
;
C-Reactive Protein
;
Critical Illness
;
Humans
;
Hydrocortisone
;
Intensive Care Units
;
Mortality
;
Multivariate Analysis
;
Plasma
;
Renin
;
Renin-Angiotensin System
;
ROC Curve
;
Shock, Septic
;
Survivors
8.Aneurysmal Neck Clipping as the Primary Treatment Option for Both Ruptured and Unruptured Middle Cerebral Artery Aneurysms.
Jai Ho CHOI ; Jung Eon PARK ; Myeong Jin KIM ; Bum Su KIM ; Yong Sam SHIN
Journal of Korean Neurosurgical Society 2016;59(3):269-275
OBJECTIVE: Although middle cerebral artery (MCA) aneurysms are less amenable to coil embolization, an increasing number of studies support favorable endovascular treatment for them. The purpose of this study is to compare the outcomes of two different treatments (surgery versus coiling) and evaluate the benefits of surgical clipping for MCA aneurysms. METHODS: Here we retrospectively analyzed the outcomes of 178 ruptured and unruptured MCA aneurysms treated in patients between September 2008 and April 2012. Parameters assessing treatment outcomes include degree of aneurysm occlusion, presence of regrowth, clinical status, and complications. RESULTS: Among 178 MCA aneurysms, 153 were treated surgically. After a mean follow-up of 12 months, the surgery group showed a clinically significant complete occlusion rate (98%) compared with the coiling group (56%) (p<0.001). Follow-up radiologic evaluation showed a higher regrowth rate (four of 16 cases) in the coiling group than in the surgery group (one of 49 cases) (p=0.003). There was no statistically significant difference in favorable clinical outcome rate between the two groups. The procedure-related permanent morbidity and mortality rates were 2% (three of 153 cases) in the surgery group and 0% (0 of 25 cases) in the coiling group. CONCLUSION: Compared to endovascular treatment, surgical neck clipping for both ruptured and unruptured MCA aneurysms results in a significantly higher complete obliteration rate and less regrowth. Therefore, even in this endovascular era, we still recommend surgical clipping as the primary treatment option for MCA aneurysms rather than coil embolization.
Aneurysm*
;
Embolization, Therapeutic
;
Follow-Up Studies
;
Humans
;
Intracranial Aneurysm*
;
Middle Cerebral Artery*
;
Mortality
;
Neck*
;
Retrospective Studies
;
Surgical Instruments
9.Comparison of Methicillin-Resistant Staphylococcus aureus Community-Acquired and Healthcare-Associated Pneumonia.
Ah Young LEEM ; Won Jai JUNG ; Young Ae KANG ; Seon Cheol PARK ; Young Jae KIM ; Eu Dong HWANG ; Eun Young KIM ; Kyung Soo JUNG ; Moo Suk PARK ; Song Yee KIM ; Young Sam KIM ; Se Kyu KIM ; Joon CHANG ; Ji Ye JUNG
Yonsei Medical Journal 2014;55(4):967-974
PURPOSE: Methicillin-resistant Staphylococcus aureus (MRSA) is recognized as an important cause of not only healthcare-associated pneumonia (HCAP) but also community-acquired pneumonia (CAP). We determined the impact of MRSA on differences in clinical characteristics, courses, and outcomes between CAP and HCAP. MATERIALS AND METHODS: We conducted a retrospective observational study on 78 adult patients admitted with MRSA pneumonia at a university-affiliated tertiary hospital between January 2008 and December 2011. We compared baseline characteristics, chest radiographs, treatment outcomes, and drug resistance patterns between the CAP and HCAP groups. RESULTS: Of the 78 patients with MRSA pneumonia, 57 (73.1%) were HCAP and 21 (26.9%) were CAP. MRSA infection history in the previous year (29.8% vs. 14.3%, p=0.244) tended to be more common in HCAP than in CAP. Despite similar Pneumonia Severity Index scores (151 in CAP vs. 142 in HCAP), intubation rates (38.1% vs. 17.5%; p=0.072) and intensive care unit admission (42.9% vs. 22.8%; p=0.095) tended to be higher in the CAP group, while 28-day mortality was higher in the HCAP group (14.3% vs. 26.3%; p=0.368), although without statistical significance. All patients showed sensitivity to vancomycin and linezolid; meanwhile, HCAP patients showed greater resistance to gentamicin than CAP patients (58.3% vs. 16.6%; p=0.037). The median total hospital charges were 6899 American dollars for CAP and 5715 American dollars for HCAP (p=0.161). CONCLUSION: MRSA pneumonia showed significantly differences in baseline characteristics, chest radiographs, treatment outcomes, and medical expenses between HCAP and CAP groups.
Aged
;
Community-Acquired Infections/*microbiology
;
Female
;
Humans
;
Male
;
Methicillin-Resistant Staphylococcus aureus/*pathogenicity
;
Middle Aged
;
Pneumonia/*microbiology
;
Retrospective Studies
10.Utility of Routine Culture for Tuberculosis from Endobronchial Ultrasound-Guided Transbronchial Needle Aspiration in a Tuberculosis Endemic Country.
Ji Young HONG ; Ji Ye JUNG ; Young Ae KANG ; Byung Hoon PARK ; Won Jai JUNG ; Su Hwan LEE ; Song Yee KIM ; Sang Kook LEE ; Kyung Soo CHUNG ; Seon Cheol PARK ; Eun Young KIM ; Ju Eun LIM ; Se Kyu KIM ; Joon CHANG ; Young Sam KIM
Tuberculosis and Respiratory Diseases 2011;71(6):408-416
BACKGROUND: Endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA) is a technique developed to allow mediastinal staging of lung cancer and also to evaluate intrathoracic lymphadenopathy. In a tuberculosis-endemic area, tuberculosis should be considered as an etiology of mediastinal lymphadenopathy. The aim of this study was to investigate the utility of the routine culture for tuberculosis from specimens of EBUS-TBNA. METHODS: We prospectively performed routine culture for tuberculosis from aspiration or core biopsy specimens got from 86 patients who had undergone EBUS-TBNA due to mediastinal lymphadenopathy between March 2010 and March 2011. RESULTS: A total of 135 lymph node aspiration and 118 core biopsy specimens were included in this analysis. We confirmed the malignancy in 62 (72.9%), tuberculosis in 7 (8.1%), sarcoidosis in 7 (8.1%), asperogillosis in 2 (2.3%) and pneumoconiosis in 2 (2.3%) patients. One lung cancer patient had pulmonary tuberculosis coincidentally and 5 patients had unknown lymphadenopathy. The number of positive culture for Mycobacterium tuberculsosis by EBUS-TBNA is 2 (1.5%) from 135 lymph node aspiration specimens and 2 (1.7%) from 118 core biopsy specimens. Out of eight patients confirmed with tuberculosis, only one patient had positive mycobacterial culture of aspiration specimen from EBUS-TBNA without histopathologic diagnosis. CONCLUSION: These results propose that routine culture for tuberculosis from EBUS-TBNA may not provide additional information for the diagnosis of coincident tuberculous lymphadenitis. However, if there is any possibility of tuberculous lymphadenopathy or pulmonary tuberculosis, it should be considered to perform EBUS-TBNA in patients who have negative sputum AFB smears or no sputum production.
Biopsy
;
Biopsy, Fine-Needle
;
Bronchoscopy
;
Humans
;
Lung Neoplasms
;
Lymph Nodes
;
Lymphatic Diseases
;
Mycobacterium
;
Needles
;
Pneumoconiosis
;
Prospective Studies
;
Sarcoidosis
;
Sputum
;
Tuberculosis
;
Tuberculosis, Lymph Node
;
Tuberculosis, Pulmonary

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