1.Innovative Approaches in Tracheal Resection and Anastomosis Surgery: Integrating Extracorporeal Membrane Oxygenation for Enhanced Safety
Joohyung SON ; Bong Soo SON ; Jong Myung PARK ; Jeong Su CHO ; Yeongdae KIM ; Hoseok I ; Do Hyung KIM
Yonsei Medical Journal 2025;66(5):289-294
		                        		
		                        			 Purpose:
		                        			Tracheal resection with end-to-end anastomosis (TREE) has many advantages over conservative treatment in terms of long-term results; however, this method requires improved safety and accessibility. We aimed to combine expanded venovenous extracorporeal membrane oxygenation (ECMO) during TREE surgery. 
		                        		
		                        			Materials and Methods:
		                        			Between May 2006 and December 2022, 41 patients diagnosed with tracheal stenosis or tracheal tumors underwent TREE. The non-ECMO and ECMO groups were classified based on the presence or absence of intraoperative ECMO support. 
		                        		
		                        			Results:
		                        			Reconstruction length was slightly longer in the ECMO group than in the non-ECMO group, but there was no statistical significance (p=0.082). There was no significant difference between the two groups in terms of operative time (p=0.698), estimated blood loss (p=0.210), and duration of mechanical ventilation (p=0.713). There was a significant difference in intensive care unit stay between the two groups (p=0.013) due to the postoperative maintenance of ECMO. There were no cases of early mortality in either group during hospitalization (p>0.999). 
		                        		
		                        			Conclusion
		                        			ECMO support could assist in more challenging cases as it makes surgery easier in difficult patient scenarios. 
		                        		
		                        		
		                        		
		                        	
2.Sleep Tracking of Two Smartwatches Against Self-Reported Logs for Circadian Rhythm and Sleep Quality Assessment in Healthy Adults
Ji-Eun PARK ; Jayeun KIM ; Hoseok KIM ; Eunkyoung AHN ; Kyuhyun YOON
Journal of Sleep Medicine 2025;22(1):8-16
		                        		
		                        			
		                        			 Although many wearable devices are used to assess sleep, their accuracy remains controversial. This study aimed to investigate the accuracy of the Actiwatch, a research-grade device, and the Fitbit, a consumer-grade device, against sleep diaries to assess sleep patterns. Methods: Twenty participants wore Fitbit and Actiwatch for two weeks and tracked their sleep patterns using sleep diaries. Total sleep time (TST), time-in-bed (TIB), sleep efficiency (SE), sleep onset latency (SOL), and wake after sleep onset (WASO) from the two devices and sleep diaries were analyzed using analysis of variance and Bland-Altman analysis. Results: The TIB measured by the sleep log, Fitbit, and Actiwatch were 420.9 minutes, 417.3 minutes, and 567.4 minutes, respectively. Compared to the sleep log, the Fitbit underestimated TST, TIB, and SE, with significant differences observed for TST (p<0.001) and SE (p<0.001), but not for TIB. The Actiwatch overestimated TIB (p<0.001) and TST (p=0.02) and underestimated SE (p<0.001) compared to the sleep log. The difference between the Fitbit and Actiwatch was significant for TST, TIB, and SE (all p<0.001). Conclusions: The Fitbit showed a smaller difference than the Actiwatch when compared with the sleep logs. The Fitbit could be used as a tool to assess sleep patterns in the clinic as well as in daily life. 
		                        		
		                        		
		                        		
		                        	
3.Innovative Approaches in Tracheal Resection and Anastomosis Surgery: Integrating Extracorporeal Membrane Oxygenation for Enhanced Safety
Joohyung SON ; Bong Soo SON ; Jong Myung PARK ; Jeong Su CHO ; Yeongdae KIM ; Hoseok I ; Do Hyung KIM
Yonsei Medical Journal 2025;66(5):289-294
		                        		
		                        			 Purpose:
		                        			Tracheal resection with end-to-end anastomosis (TREE) has many advantages over conservative treatment in terms of long-term results; however, this method requires improved safety and accessibility. We aimed to combine expanded venovenous extracorporeal membrane oxygenation (ECMO) during TREE surgery. 
		                        		
		                        			Materials and Methods:
		                        			Between May 2006 and December 2022, 41 patients diagnosed with tracheal stenosis or tracheal tumors underwent TREE. The non-ECMO and ECMO groups were classified based on the presence or absence of intraoperative ECMO support. 
		                        		
		                        			Results:
		                        			Reconstruction length was slightly longer in the ECMO group than in the non-ECMO group, but there was no statistical significance (p=0.082). There was no significant difference between the two groups in terms of operative time (p=0.698), estimated blood loss (p=0.210), and duration of mechanical ventilation (p=0.713). There was a significant difference in intensive care unit stay between the two groups (p=0.013) due to the postoperative maintenance of ECMO. There were no cases of early mortality in either group during hospitalization (p>0.999). 
		                        		
		                        			Conclusion
		                        			ECMO support could assist in more challenging cases as it makes surgery easier in difficult patient scenarios. 
		                        		
		                        		
		                        		
		                        	
4.Innovative Approaches in Tracheal Resection and Anastomosis Surgery: Integrating Extracorporeal Membrane Oxygenation for Enhanced Safety
Joohyung SON ; Bong Soo SON ; Jong Myung PARK ; Jeong Su CHO ; Yeongdae KIM ; Hoseok I ; Do Hyung KIM
Yonsei Medical Journal 2025;66(5):289-294
		                        		
		                        			 Purpose:
		                        			Tracheal resection with end-to-end anastomosis (TREE) has many advantages over conservative treatment in terms of long-term results; however, this method requires improved safety and accessibility. We aimed to combine expanded venovenous extracorporeal membrane oxygenation (ECMO) during TREE surgery. 
		                        		
		                        			Materials and Methods:
		                        			Between May 2006 and December 2022, 41 patients diagnosed with tracheal stenosis or tracheal tumors underwent TREE. The non-ECMO and ECMO groups were classified based on the presence or absence of intraoperative ECMO support. 
		                        		
		                        			Results:
		                        			Reconstruction length was slightly longer in the ECMO group than in the non-ECMO group, but there was no statistical significance (p=0.082). There was no significant difference between the two groups in terms of operative time (p=0.698), estimated blood loss (p=0.210), and duration of mechanical ventilation (p=0.713). There was a significant difference in intensive care unit stay between the two groups (p=0.013) due to the postoperative maintenance of ECMO. There were no cases of early mortality in either group during hospitalization (p>0.999). 
		                        		
		                        			Conclusion
		                        			ECMO support could assist in more challenging cases as it makes surgery easier in difficult patient scenarios. 
		                        		
		                        		
		                        		
		                        	
5.Sleep Tracking of Two Smartwatches Against Self-Reported Logs for Circadian Rhythm and Sleep Quality Assessment in Healthy Adults
Ji-Eun PARK ; Jayeun KIM ; Hoseok KIM ; Eunkyoung AHN ; Kyuhyun YOON
Journal of Sleep Medicine 2025;22(1):8-16
		                        		
		                        			
		                        			 Although many wearable devices are used to assess sleep, their accuracy remains controversial. This study aimed to investigate the accuracy of the Actiwatch, a research-grade device, and the Fitbit, a consumer-grade device, against sleep diaries to assess sleep patterns. Methods: Twenty participants wore Fitbit and Actiwatch for two weeks and tracked their sleep patterns using sleep diaries. Total sleep time (TST), time-in-bed (TIB), sleep efficiency (SE), sleep onset latency (SOL), and wake after sleep onset (WASO) from the two devices and sleep diaries were analyzed using analysis of variance and Bland-Altman analysis. Results: The TIB measured by the sleep log, Fitbit, and Actiwatch were 420.9 minutes, 417.3 minutes, and 567.4 minutes, respectively. Compared to the sleep log, the Fitbit underestimated TST, TIB, and SE, with significant differences observed for TST (p<0.001) and SE (p<0.001), but not for TIB. The Actiwatch overestimated TIB (p<0.001) and TST (p=0.02) and underestimated SE (p<0.001) compared to the sleep log. The difference between the Fitbit and Actiwatch was significant for TST, TIB, and SE (all p<0.001). Conclusions: The Fitbit showed a smaller difference than the Actiwatch when compared with the sleep logs. The Fitbit could be used as a tool to assess sleep patterns in the clinic as well as in daily life. 
		                        		
		                        		
		                        		
		                        	
6.Innovative Approaches in Tracheal Resection and Anastomosis Surgery: Integrating Extracorporeal Membrane Oxygenation for Enhanced Safety
Joohyung SON ; Bong Soo SON ; Jong Myung PARK ; Jeong Su CHO ; Yeongdae KIM ; Hoseok I ; Do Hyung KIM
Yonsei Medical Journal 2025;66(5):289-294
		                        		
		                        			 Purpose:
		                        			Tracheal resection with end-to-end anastomosis (TREE) has many advantages over conservative treatment in terms of long-term results; however, this method requires improved safety and accessibility. We aimed to combine expanded venovenous extracorporeal membrane oxygenation (ECMO) during TREE surgery. 
		                        		
		                        			Materials and Methods:
		                        			Between May 2006 and December 2022, 41 patients diagnosed with tracheal stenosis or tracheal tumors underwent TREE. The non-ECMO and ECMO groups were classified based on the presence or absence of intraoperative ECMO support. 
		                        		
		                        			Results:
		                        			Reconstruction length was slightly longer in the ECMO group than in the non-ECMO group, but there was no statistical significance (p=0.082). There was no significant difference between the two groups in terms of operative time (p=0.698), estimated blood loss (p=0.210), and duration of mechanical ventilation (p=0.713). There was a significant difference in intensive care unit stay between the two groups (p=0.013) due to the postoperative maintenance of ECMO. There were no cases of early mortality in either group during hospitalization (p>0.999). 
		                        		
		                        			Conclusion
		                        			ECMO support could assist in more challenging cases as it makes surgery easier in difficult patient scenarios. 
		                        		
		                        		
		                        		
		                        	
7.Sleep Tracking of Two Smartwatches Against Self-Reported Logs for Circadian Rhythm and Sleep Quality Assessment in Healthy Adults
Ji-Eun PARK ; Jayeun KIM ; Hoseok KIM ; Eunkyoung AHN ; Kyuhyun YOON
Journal of Sleep Medicine 2025;22(1):8-16
		                        		
		                        			
		                        			 Although many wearable devices are used to assess sleep, their accuracy remains controversial. This study aimed to investigate the accuracy of the Actiwatch, a research-grade device, and the Fitbit, a consumer-grade device, against sleep diaries to assess sleep patterns. Methods: Twenty participants wore Fitbit and Actiwatch for two weeks and tracked their sleep patterns using sleep diaries. Total sleep time (TST), time-in-bed (TIB), sleep efficiency (SE), sleep onset latency (SOL), and wake after sleep onset (WASO) from the two devices and sleep diaries were analyzed using analysis of variance and Bland-Altman analysis. Results: The TIB measured by the sleep log, Fitbit, and Actiwatch were 420.9 minutes, 417.3 minutes, and 567.4 minutes, respectively. Compared to the sleep log, the Fitbit underestimated TST, TIB, and SE, with significant differences observed for TST (p<0.001) and SE (p<0.001), but not for TIB. The Actiwatch overestimated TIB (p<0.001) and TST (p=0.02) and underestimated SE (p<0.001) compared to the sleep log. The difference between the Fitbit and Actiwatch was significant for TST, TIB, and SE (all p<0.001). Conclusions: The Fitbit showed a smaller difference than the Actiwatch when compared with the sleep logs. The Fitbit could be used as a tool to assess sleep patterns in the clinic as well as in daily life. 
		                        		
		                        		
		                        		
		                        	
8.Innovative Approaches in Tracheal Resection and Anastomosis Surgery: Integrating Extracorporeal Membrane Oxygenation for Enhanced Safety
Joohyung SON ; Bong Soo SON ; Jong Myung PARK ; Jeong Su CHO ; Yeongdae KIM ; Hoseok I ; Do Hyung KIM
Yonsei Medical Journal 2025;66(5):289-294
		                        		
		                        			 Purpose:
		                        			Tracheal resection with end-to-end anastomosis (TREE) has many advantages over conservative treatment in terms of long-term results; however, this method requires improved safety and accessibility. We aimed to combine expanded venovenous extracorporeal membrane oxygenation (ECMO) during TREE surgery. 
		                        		
		                        			Materials and Methods:
		                        			Between May 2006 and December 2022, 41 patients diagnosed with tracheal stenosis or tracheal tumors underwent TREE. The non-ECMO and ECMO groups were classified based on the presence or absence of intraoperative ECMO support. 
		                        		
		                        			Results:
		                        			Reconstruction length was slightly longer in the ECMO group than in the non-ECMO group, but there was no statistical significance (p=0.082). There was no significant difference between the two groups in terms of operative time (p=0.698), estimated blood loss (p=0.210), and duration of mechanical ventilation (p=0.713). There was a significant difference in intensive care unit stay between the two groups (p=0.013) due to the postoperative maintenance of ECMO. There were no cases of early mortality in either group during hospitalization (p>0.999). 
		                        		
		                        			Conclusion
		                        			ECMO support could assist in more challenging cases as it makes surgery easier in difficult patient scenarios. 
		                        		
		                        		
		                        		
		                        	
10.Risk of ventricular tachycardia and its outcomes in patients undergoing continuous renal replacement therapy due to acute kidney injury
Seong Geun KIM ; Donghwan YUN ; Jayoun KIM ; Jinwoo LEE ; Min Woo KANG ; Yong Chul KIM ; Dong Ki KIM ; Kook-Hwan OH ; Kwon Wook JOO ; Hoseok KOO ; Yon Su KIM ; Seung Seok HAN
Kidney Research and Clinical Practice 2023;42(3):370-378
		                        		
		                        			
		                        			 Despite efforts to treat critically ill patients who require continuous renal replacement therapy (CRRT) due to acute kidney injury (AKI), their mortality risk remains high. This condition may be attributable to complications of CRRT, such as arrhythmias. Here, we addressed the occurrence of ventricular tachycardia (VT) during CRRT and its relationship with patient outcomes. Methods: This study retrospectively enrolled 2,397 patients who started CRRT due to AKI from 2010 to 2020 at Seoul National University Hospital in Korea. The occurrence of VT was evaluated from the initiation of CRRT until weaning from CRRT. The odds ratios (ORs) of mortality outcomes were measured using logistic regression models after adjustment for multiple variables. Results: VT occurred in 150 patients (6.3%) after starting CRRT. Among them, 95 cases were defined as sustained VT (i.e., lasting ≥30 seconds), and the other 55 cases were defined as non-sustained VT (i.e., lasting <30 seconds). The occurrence of sustained VT was associated with a higher mortality rate than a nonoccurrence (OR, 2.04 and 95% confidence interval [CI], 1.23–3.39 for the 30- day mortality; OR, 4.06 and 95% CI, 2.04–8.08 for the 90-day mortality). The mortality risk did not differ between patients with non-sustained VT and nonoccurrence. A history of myocardial infarction, vasopressor use, and certain trends of blood laboratory findings (such as acidosis and hyperkalemia) were associated with the subsequent risk of sustained VT. Conclusion: Sustained VT occurrence after starting CRRT is associated with increased patient mortality. The monitoring of electrolytes and acid-base status during CRRT is essential because of its relationship with the risk of VT.  
		                        		
		                        		
		                        		
		                        	
            
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