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Jae-Sang Oh,Jae-Won Doh,Jai-Joon Shim,Kyeong-Seok Lee,Seok-Mann Yoon,Hack-Gun Bae 대한척추신경외과학회 2016 Neurospine Vol.13 No.2
Objective: Preinjection gelfoam embolization during percutaneous vertebroplasty (PVP) has been thought alternative technique to prevent the leakage of bone cement. The goal of this study was to evaluate whether the gelfoam techniques are useful to reduce bone cement leakage. Methods: Total 100 PVPs of osteoporotic spine compression fractures were performed by 1 spine surgeon who experienced more than 500 PVP cases under prospective control study. Operation was done in T-L junction (T10-L2) fractures with bitranspedicular approach. Preinjection gelfoam PVP was done in the 50 levels. As control group, PVP without gelfoam was done in the 50 levels. We did not perform preoperative venography. We inserted normal saline-mixed gelfoam to the anterior third of vertebral body via PVP needle, and then 3mL of polymethylmetacrylate (PMMA) was injected. We prospectively evaluated the incidence and leakage pattern of PMMA by postoperative computed tomography. Results: Between gelfoam and control groups, there were 11 leaks (22%) versus 12 leaks (26%). The mean operation time was 7.00 minutes versus 6.30 minutes. In gelfoam group, there were 6 spinal canal leaks, 4 paravertebral venous leaks, and 1 soft tissue leaks. In control group, there were 4 spinal canal leaks, 8 paravertebral venous leaks, and 1 disc space leak. In spite of cement leakage, there was no symptomatic case in both groups. Statistically, gelfoam technique was not related to decrease the incidence of leakage (p=0.64). Conclusion: Our prospective study showed that it did not significantly decrease cement leakage when vertebroplasty is performed by experienced spine surgeon.
Tailgut cyst accompanied with bony defect
Jae-Sang Oh,Jai-Joon Shim,Kyeong-Seok Lee,Jae-Won Doh 대한외과학회 2016 Annals of Surgical Treatment and Research(ASRT) Vol.90 No.4
Retro-rectal cystic hamartoma (tailgut cyst), is an uncommon congenital developmental lesion, generally located in the retro-rectal space. Its diagnosis and approach is challenging because the retropelvic space is not familiar. We report a 51-year-old woman who presented with paresthesia and pain in perianal area. The magnetic resonance image showed high signal intensity on the T1-weighted image and iso to high signal intensity on the T2-weighted image of the retropelvic space and CT showed sacral bony defect. We chose the posterior approach for removal of the tailgut cyst. Histopathology exam of the retropelvic cyst revealed a multiloculated cyst containing abundant mucoid material lined by both squamous and glandular mucinous epithelium. The patient has recovered nicely with no recurrence. Tailgut cyst needs complete surgical excision for good prognosis. So, a preoperative high-resolution image and co-operation between neurosurgen and general surgeon would help to make safe and feasible diagnosis and surgical access.
Leading a Patient of Ankylosing Spondylitis to Death by Iatrogenic Spinal Fracture
Jae-Sang Oh,Jae-Won Doh,Jai-Joon Shim,Kyeong-Seok Lee 대한척추신경외과학회 2016 Neurospine Vol.13 No.2
weaker and vulnerable to minor trauma. An 83-year-old woman with a history of chronic AS and severe osteoporosis developed paraparesis and voiding difficulty for 4 days prior. She had been placed in the lateral decubitus position in a bedridden state in a convalescent hospital due to the progressive paraparesis. The laboratory findings showed CO2 retention in the arterial blood gas analysis. After the patient was transferred to the computed tomography (CT) room, a CT was taken in the supine position. Approximately half an hour later, the resident in our neurosurgical department checked on her, and the neurological examination showed a complete paraplegic state. She was treated conservatively and finally expired 20 days later.
Doh, Chil-Hoon,Ha, Yoon-Cheol,Eom, Seung-Wook,Yu, Jihyun,Choe, Seon-Hwa,Kim, Seog-Whan,Choi, Jae-Won The Korean Electrochemical Society 2022 Journal of electrochemical science and technology Vol.13 No.3
Heat generation and temperature of a battery is usually presented by an equation of current. This means that we need to adopt time domain calculation to obtain thermal characteristics of the battery. To avoid the complicated calculations using time domain, 'state of charge (SOC)' can be used as an independent variable. A SOC based calculation method is elucidated through the comparison between the calculated results and experimental results together. Experiments are carried for rapid resistive discharge of a large-capacitive lithium secondary battery to evaluate variations of cell potential, current and temperature. Calculations are performed based on open-circuit cell potential (SOC,T), internal resistance (SOC,T) and entropy (SOC) with specific heat capacity.
Which One Is Better to Reduce the Infection Rate, Early or Late Cranioplasty?
Oh, Jae-Sang,Lee, Kyeong-Seok,Shim, Jai-Joon,Yoon, Seok-Mann,Doh, Jae-Won,Bae, Hack-Gun The Korean Neurosurgical Society 2016 Journal of Korean neurosurgical society Vol.59 No.5
Objective : Decompressive craniectomy is an effective therapy to relieve high intracranial pressure after acute brain damage. However, the optimal timing for cranioplasty after decompression is still controversial. Many authors reported that early cranioplasty may contribute to improve the cerebral blood flow and brain metabolism. However, despite all the advantages, there always remains a concern that early cranioplasty may increase the chance of infection. The purpose of this retrospective study is to investigate whether the early cranioplasty increase the infection rate. We also evaluated the risk factors of infection following cranioplasty. Methods : We retrospectively examined the results of 131 patients who underwent cranioplasty in our institution between January 2008 and June 2015. We divided them into early (${\leq}90days$) and late (>90 days after craniectomy) groups. We examined the risk factors of infection after cranioplasty. We analyzed the infection rate between two groups. Results : There were more male patients (62%) than female (38%). The mean age was 49 years. Infection occurred in 17 patients (13%) after cranioplasty. The infection rate of early cranioplasty was lower than that of late cranioplasty (7% vs. 20%; p=0.02). Early cranioplasty, non-metal allograft materials, re-operation before cranioplasty and younger age were the significant factors in the infection rate after cranioplasty (p<0.05). Especially allograft was a significant risk factor of infection (odds ratio, 12.4; 95% confidence interval, 3.24-47.33; p<0.01). Younger age was also a significant risk factor of infection after cranioplasty by multivariable analysis (odds ratio, 0.96; 95% confidence interval, 0.96-0.99; p=0.02). Conclusion : Early cranioplasty did not increase the infection rate in this study. The use of non-metal allograft materials influenced a more important role in infection in cranioplasty. Actually, timing itself was not a significant risk factor in multivariate analysis. So the early cranioplasty may bring better outcomes in cognitive functions or wound without raising the infection rate.
( Sang Won Lee ),( Doh Hyung Kim ),( Youn Seup Kim ),( Jae Seok Park ),( Young Koo Jee ),( Goohyeon Hong ) 대한내과학회 2016 대한내과학회 추계학술발표논문집 Vol.2016 No.1
Acute respiratory distress syndrome (ARDS) caused by pneumonia in patients with hematologic malignancies can be life-threatening. Extracorporeal membrane oxygenation (ECMO) is the only temporary treatment for patients with ARDS who are refractory to conventional treatment. However, the immunosuppression and coagulopathies in hematological malignancies such as lymphoma and acute leukemia are relative contraindications for ECMO, due to high risks of infection and bleeding. Here, we report a 22-year-old man with acute myeloid leukemia (AML) who developed pneumonia and ARDS during chemotherapy; he was treated successfully with ECMO. To the best of our knowledge, this is the first reported case of ECMO as rescue therapy during chemotherapy in a Korean patient with ARDS associated with AML.
대장 및 말단회장에서 발생한 미란 혹은 작은 궤양 병변의 임상 의의 -단기간의 추적관찰 연구-
김도현 ( Doh Hyun Kim ),이광재 ( Kwang Jae Lee ),김영배 ( Yeong Bae Kim ),이은희 ( Eun Hee Lee ),송현주 ( Hyun Ju Song ),김진홍 ( Jin Hong Kim ),함기백 ( Ki Baik Hahm ),조성원 ( Sung Won Cho ) 대한소화기학회 2004 대한소화기학회지 Vol.44 No.6
Background/Aims: Various etiologies and diseases may be related to erosions and/or small ulcers without gross inflammatory changes in the surrounding mucosa found in the colon and terminal ileum during colonoscopy. However, studies on follow-up of these l