1.The actual duration of spinal cord stimulator use in patients with complex regional pain syndrome:a Korean nationwide cohort study
In-Ae SONG ; Joon Hee LEE ; Woong Ki HAN ; Francis Sahngun NAHM
The Korean Journal of Pain 2025;38(1):51-57
		                        		
		                        			 Background:
		                        			Spinal cord stimulators (SCSs) are used to reduce pain and improve quality of life in patients with complex regional pain syndrome (CRPS). However, many patients opt for device removal after SCS implantation due to diminished effect or complications. There is limited research on the actual duration of SCS use in CRPS patients, and no nationwide population-based studies exist. This study aimed to estimate the real-world duration of SCS use in CRPS patients and examine the influencing factors on the duration of SCS use by analyzing the National Healthcare Insurance Database. 
		                        		
		                        			Methods:
		                        			Adult patients (age ≥ 18) with CRPS who underwent permanent SCS implantation between 2014 and2021 were included. The authors analyzed the median duration of SCS implantation and evaluated the impacts of age, sex, hospital type, and insurance type. 
		                        		
		                        			Results:
		                        			Of 408 potential patients, 373 patients were included. The median duration of SCS use was 4.4 (95%confidence interval [CI]: 4.0–4.8) years. Male patients retained SCSs longer than female patients (4.7 vs. 4.0 years, P = 0.014), and veterans’ healthcare beneficiaries showed the longest duration of SCS use (median 6.9 [95% CI: 4.6–7.8] years). Age and hospital type did not affect the duration of SCS use (P = 0.381 and P = 0.122, respectively). 
		                        		
		                        			Conclusions
		                        			The median SCS use duration in CRPS patients was 4.4 years. Considering the high cost and invasiveness of SCS, patients should be informed about the expected duration of SCS use, alongside potential risks and benefits. 
		                        		
		                        		
		                        		
		                        	
2.The actual duration of spinal cord stimulator use in patients with complex regional pain syndrome:a Korean nationwide cohort study
In-Ae SONG ; Joon Hee LEE ; Woong Ki HAN ; Francis Sahngun NAHM
The Korean Journal of Pain 2025;38(1):51-57
		                        		
		                        			 Background:
		                        			Spinal cord stimulators (SCSs) are used to reduce pain and improve quality of life in patients with complex regional pain syndrome (CRPS). However, many patients opt for device removal after SCS implantation due to diminished effect or complications. There is limited research on the actual duration of SCS use in CRPS patients, and no nationwide population-based studies exist. This study aimed to estimate the real-world duration of SCS use in CRPS patients and examine the influencing factors on the duration of SCS use by analyzing the National Healthcare Insurance Database. 
		                        		
		                        			Methods:
		                        			Adult patients (age ≥ 18) with CRPS who underwent permanent SCS implantation between 2014 and2021 were included. The authors analyzed the median duration of SCS implantation and evaluated the impacts of age, sex, hospital type, and insurance type. 
		                        		
		                        			Results:
		                        			Of 408 potential patients, 373 patients were included. The median duration of SCS use was 4.4 (95%confidence interval [CI]: 4.0–4.8) years. Male patients retained SCSs longer than female patients (4.7 vs. 4.0 years, P = 0.014), and veterans’ healthcare beneficiaries showed the longest duration of SCS use (median 6.9 [95% CI: 4.6–7.8] years). Age and hospital type did not affect the duration of SCS use (P = 0.381 and P = 0.122, respectively). 
		                        		
		                        			Conclusions
		                        			The median SCS use duration in CRPS patients was 4.4 years. Considering the high cost and invasiveness of SCS, patients should be informed about the expected duration of SCS use, alongside potential risks and benefits. 
		                        		
		                        		
		                        		
		                        	
3.The actual duration of spinal cord stimulator use in patients with complex regional pain syndrome:a Korean nationwide cohort study
In-Ae SONG ; Joon Hee LEE ; Woong Ki HAN ; Francis Sahngun NAHM
The Korean Journal of Pain 2025;38(1):51-57
		                        		
		                        			 Background:
		                        			Spinal cord stimulators (SCSs) are used to reduce pain and improve quality of life in patients with complex regional pain syndrome (CRPS). However, many patients opt for device removal after SCS implantation due to diminished effect or complications. There is limited research on the actual duration of SCS use in CRPS patients, and no nationwide population-based studies exist. This study aimed to estimate the real-world duration of SCS use in CRPS patients and examine the influencing factors on the duration of SCS use by analyzing the National Healthcare Insurance Database. 
		                        		
		                        			Methods:
		                        			Adult patients (age ≥ 18) with CRPS who underwent permanent SCS implantation between 2014 and2021 were included. The authors analyzed the median duration of SCS implantation and evaluated the impacts of age, sex, hospital type, and insurance type. 
		                        		
		                        			Results:
		                        			Of 408 potential patients, 373 patients were included. The median duration of SCS use was 4.4 (95%confidence interval [CI]: 4.0–4.8) years. Male patients retained SCSs longer than female patients (4.7 vs. 4.0 years, P = 0.014), and veterans’ healthcare beneficiaries showed the longest duration of SCS use (median 6.9 [95% CI: 4.6–7.8] years). Age and hospital type did not affect the duration of SCS use (P = 0.381 and P = 0.122, respectively). 
		                        		
		                        			Conclusions
		                        			The median SCS use duration in CRPS patients was 4.4 years. Considering the high cost and invasiveness of SCS, patients should be informed about the expected duration of SCS use, alongside potential risks and benefits. 
		                        		
		                        		
		                        		
		                        	
4.The actual duration of spinal cord stimulator use in patients with complex regional pain syndrome:a Korean nationwide cohort study
In-Ae SONG ; Joon Hee LEE ; Woong Ki HAN ; Francis Sahngun NAHM
The Korean Journal of Pain 2025;38(1):51-57
		                        		
		                        			 Background:
		                        			Spinal cord stimulators (SCSs) are used to reduce pain and improve quality of life in patients with complex regional pain syndrome (CRPS). However, many patients opt for device removal after SCS implantation due to diminished effect or complications. There is limited research on the actual duration of SCS use in CRPS patients, and no nationwide population-based studies exist. This study aimed to estimate the real-world duration of SCS use in CRPS patients and examine the influencing factors on the duration of SCS use by analyzing the National Healthcare Insurance Database. 
		                        		
		                        			Methods:
		                        			Adult patients (age ≥ 18) with CRPS who underwent permanent SCS implantation between 2014 and2021 were included. The authors analyzed the median duration of SCS implantation and evaluated the impacts of age, sex, hospital type, and insurance type. 
		                        		
		                        			Results:
		                        			Of 408 potential patients, 373 patients were included. The median duration of SCS use was 4.4 (95%confidence interval [CI]: 4.0–4.8) years. Male patients retained SCSs longer than female patients (4.7 vs. 4.0 years, P = 0.014), and veterans’ healthcare beneficiaries showed the longest duration of SCS use (median 6.9 [95% CI: 4.6–7.8] years). Age and hospital type did not affect the duration of SCS use (P = 0.381 and P = 0.122, respectively). 
		                        		
		                        			Conclusions
		                        			The median SCS use duration in CRPS patients was 4.4 years. Considering the high cost and invasiveness of SCS, patients should be informed about the expected duration of SCS use, alongside potential risks and benefits. 
		                        		
		                        		
		                        		
		                        	
5.The actual duration of spinal cord stimulator use in patients with complex regional pain syndrome:a Korean nationwide cohort study
In-Ae SONG ; Joon Hee LEE ; Woong Ki HAN ; Francis Sahngun NAHM
The Korean Journal of Pain 2025;38(1):51-57
		                        		
		                        			 Background:
		                        			Spinal cord stimulators (SCSs) are used to reduce pain and improve quality of life in patients with complex regional pain syndrome (CRPS). However, many patients opt for device removal after SCS implantation due to diminished effect or complications. There is limited research on the actual duration of SCS use in CRPS patients, and no nationwide population-based studies exist. This study aimed to estimate the real-world duration of SCS use in CRPS patients and examine the influencing factors on the duration of SCS use by analyzing the National Healthcare Insurance Database. 
		                        		
		                        			Methods:
		                        			Adult patients (age ≥ 18) with CRPS who underwent permanent SCS implantation between 2014 and2021 were included. The authors analyzed the median duration of SCS implantation and evaluated the impacts of age, sex, hospital type, and insurance type. 
		                        		
		                        			Results:
		                        			Of 408 potential patients, 373 patients were included. The median duration of SCS use was 4.4 (95%confidence interval [CI]: 4.0–4.8) years. Male patients retained SCSs longer than female patients (4.7 vs. 4.0 years, P = 0.014), and veterans’ healthcare beneficiaries showed the longest duration of SCS use (median 6.9 [95% CI: 4.6–7.8] years). Age and hospital type did not affect the duration of SCS use (P = 0.381 and P = 0.122, respectively). 
		                        		
		                        			Conclusions
		                        			The median SCS use duration in CRPS patients was 4.4 years. Considering the high cost and invasiveness of SCS, patients should be informed about the expected duration of SCS use, alongside potential risks and benefits. 
		                        		
		                        		
		                        		
		                        	
6.Association of electrocardiographic abnormalities with in-hospital mortality in adult patients with COVID-19 infection
Jannah Lee Tarranza ; Marcellus Francis Ramirez ; Milagros Yamamoto
Philippine Journal of Cardiology 2024;52(2):32-42
OBJECTIVES
The study aimed to determine the association of electrocardiographic (ECG) abnormalities and in-hospital mortality of patients with coronavirus disease 2019 (COVID-19) infection admitted in a tertiary care hospital in the Philippines.
METHODSWe conducted a retrospective study of confirmed COVID-19–infected patients. Demographic and clinical characteristics and clinical outcomes were extracted from the medical records. Electrocardiographic analysis was derived from the 12-lead electrocardiogram recorded upon admission. The frequencies and distributions of various clinical characteristics were described, and the ECG abnormalities associated with in-hospital mortality were investigated.
RESULTSA total of 163 patients were included in the study; most were female (52.7%) with a median age of 55 years. Sinus rhythm with any ECG abnormality (65%), nonspecific ST and T-wave changes (35%), and sinus tachycardia (22%) were the frequently reported ECG findings. The presence of any ECG abnormality was detected in 78.5% of patients, and it was significantly associated with in-hospital mortality (P = 0.038). The analysis revealed a statistically significant association between in-hospital mortality and having atrial fibrillation or flutter (P = 0.002), supraventricular tachycardia (P = 0.011), ventricular tachycardia (P = 0.011), third-degree atrioventricular block (P = 0.011), T-wave inversion (P = 0.005), and right ventricular hypertrophy (P = 0.011).
The presence of any ECG abnormality in patients with COVID-19 infection was associated with in-hospital mortality. Electrocardiographic abnormalities that were associated with mortality were atrial fibrillation or flutter, supraventricular tachycardia, ventricular tachycardia, third-degree atrioventricular block, T-wave inversion, and right ventricular hypertrophy.
Human ; Covid-19 ; Electrocardiography ; Mortality ; Philippines
7.Hearing screening through frequency analysis of auditory brainstem response using PhysioNet Data
Catherine Manuela Lee-Ramos ; Al Francis L. Bontogon ; Angelica S. Collanto ; Patrick John P. Labra ; Luis G. Sison ; Charlotte M. Chiong
Acta Medica Philippina 2023;57(9):32-38
		                        		
		                        			Objectives:
		                        			Responding to the reality of neonate patients with delayed childhood development due to late diagnosis of and intervention on hearing impairment, this study aims to determine the features based on time-frequency domain of auditory brainstem response (ABR) signals and to test the protocol on ABR signals from PhysioNet.
		                        		
		                        			Methods:
		                        			This is done by pre-processing, performing time-frequency analysis, and characterizing hearing impairment using the dominant features of the ABR. In this study, normal (N) and hearing impaired (HI) ABR adult human signals were acquired from Physionet.org, a publicly available database. Considering its high signal-to-noise ratio, numerous filters and transformations were applied to extract the ABR. Consequently, the features acquired — dominant frequency and bigrams, were used as data classifiers.
		                        		
		                        			Results:
		                        			Initial results using only N classifiers, that is features from the Normal dataset, and bandpass Chebyshev filter with a lower cut-off frequency of 60 Hz show that the tests yielded low to middle sensitivity. Further tests were done to improve the sensitivity that incorporated the HI classifiers, used data filtered with a low cut-off frequency of 300 Hz, and data divided per stimulus intensity level.
		                        		
		                        			Conclusion
		                        			Conclusions made are 1) data with both N and HI classifiers have higher sensitivity than those using only N classifiers, 2) data with a Chebyshev cut-off frequency of 300 Hz have a higher sensitivity than those with 60 Hz, and 3) data divided per intensity level have a higher sensitivity than data analyzed as a whole, and that features with stimulus intensity in middle ranges have a better distinction between HI and N patients.
		                        		
		                        		
		                        		
		                        			Evoked Potentials
		                        			;
		                        		
		                        			 Brain Stem
		                        			;
		                        		
		                        			 Delayed Diagnosis
		                        			
		                        		
		                        	
8.The principles of presenting statistical results using figures
Jae Hong PARK ; Dong Kyu LEE ; Hyun KANG ; Jong Hae KIM ; Francis Sahngun NAHM ; EunJin AHN ; Junyong IN ; Sang Gyu KWAK ; Chi-Yeon LIM
Korean Journal of Anesthesiology 2022;75(2):139-150
		                        		
		                        			
		                        			 Tables and figures are commonly adopted methods for presenting specific data or statistical analysis results. Figures can be used to display characteristics and distributions of data, allowing for intuitive understanding through visualization and thus making it easier to interpret the statistical results. To maximize the positive aspects of figure presentation and increase the accuracy of the content, in this article, the authors will describe how to choose an appropriate figure type and the necessary components to include. Additionally, this article includes examples of figures that are commonly used in research and their essential components using virtual data. 
		                        		
		                        		
		                        		
		                        	
9.A Comparative Study of an Anti-Thrombotic Small-Diameter Vascular Graft with Commercially Available e-PTFE Graft in a Porcine Carotid Model
Kyo Seon LEE ; Mukhammad KAYUMOV ; Gladys A. EMECHEBE ; Do-Wan KIM ; Hwa-Jin CHO ; Yun-Jin JEONG ; Dong-Weon LEE ; Jun-Kyu PARK ; Chan-Hee PARK ; Cheol-Sang KIM ; Francis O. OBIWELUOZOR ; In-Seok JEONG
Tissue Engineering and Regenerative Medicine 2022;19(3):537-551
		                        		
		                        			 BACKGROUND:
		                        			We have designed a reinforced drug-loaded vascular graft composed of polycaprolactone (PCL) and polydioxanone (PDO) via a combination of electrospinning/3D printing approaches. To evaluate its potential for clinical application, we compared the in vivo blood compatibility and performance of PCL/PDO ? 10%DY grafts doped with an antithrombotic drug (dipyridamole) with a commercial expanded polytetrafluoroethylene (e-PTFE) graft in a porcine model. 
		                        		
		                        			METHODS:
		                        			A total of 10 pigs (weight: 25–35 kg) were used in this study. We made a new 5-mm graft with PCL/PDO composite nanofiber via the electrospinning technique. We simultaneously implanted a commercially available e-PTFE graft (n = 5) and our PCL/PDO ? 10%DY graft (n = 5) into the carotid arteries of the pigs. No anticoagulant/antiplatelet agent was administered during the follow-up period, and ultrasonography was performed weekly to confirm the patency of the two grafts in vivo. Four weeks later, we explanted and compared the performance of the two grafts by histological analysis and scanning electron microscopy (SEM). 
		                        		
		                        			RESULTS:
		                        			No complications, such as sweating on the graft or significant bleeding from the needle hole site, were seen in the PCL/PDO ? 10%DY graft immediately after implantation. Serial ultrasonographic examination and immunohistochemical analysis demonstrated that PCL/PDO ? 10%DY grafts showed normal physiological blood flow and minimal lumen reduction, and pulsed synchronously with the native artery at 4 weeks after implantation. However, all e-PTFE grafts occluded within the study period. The luminal surface of the PCL/PDO ? 10%DY graft in the transitional zone was fully covered with endothelial cells as observed by SEM. 
		                        		
		                        			CONCLUSION
		                        			The PCL/PDO ? 10%DY graft was well tolerated, and no adverse tissue reaction was observed in porcine carotid models during the short-term follow-up. Colonization of the graft by host endothelial and smooth muscle cells coupled with substantial extracellular matrix production marked the regenerative capability. Thus, this material may be an ideal substitute for vascular reconstruction and bypass surgeries. Long-term observations will be necessary to determine the anti-thrombotic and remodeling potential of this device. 
		                        		
		                        		
		                        		
		                        	
10.The University of Santo Tomas Hospital (USTH) 2022 Institutional Chest Pain Pathway: Approach to diagnosis, risk stratification, and management.
Jannah Lee TARRANZA ; Christine Joy BONGON ; Maria Monica VALDEZ ; John Paul TIOPIANCO ; Alexander REYES ; John Patrick ONA ; Don Robespierre REYES ; Marcellus Francis RAMIREZ ; Aileen Cynthia DE LARA ; Clarissa MENDOZA ; Wilson Tan DE GUZMAN ; Zacarias MANUEL ; Eduardo S. CAGUIOA ; Milagros YAMAMOTO
Journal of Medicine University of Santo Tomas 2022;6(S1):11-24
		                        		
		                        			
		                        			This clinical pathway for the diagnosis and risk stratification of patients presenting with acute chest pain, including acute coronary syndromes, provides recommendations and algorithms for clinicians to diagnose, risk stratify, and manage acute chest pain in adult patients. The writing committee reviewed existing international and local guidelines. Modifications to the algorithm following face-to-face and virtual meetings resulted in expert decisions written as recommendations and presented in a flow diagram format. The USTH Chest Pain Pathway provides guidance based on current guidelines and recommendations on assessing and evaluating acute chest pain, tailored to local needs and institution-specific facilities. We recommend its use to ensure quality patient care in the hospital.
		                        		
		                        		
		                        		
		                        			Acute Coronary Syndrome|critical Pathways
		                        			
		                        		
		                        	
            

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