1.CT findings of rounded atelectasis.
Chan Wha LEE ; Kyu Ok CHOE ; Jong Doo LEE ; Eun Kyoung HAN ; Woo Ick YANG
Journal of the Korean Radiological Society 1991;27(2):231-235
No abstract available.
Pulmonary Atelectasis*
2.Analgesic Effect of Epidural Morphine and Incisional Site Infiltration with Bupivacaine in the Lower Abdominal Surgery.
Kyoung Hag OH ; Jin Song KIM ; Young Jin HAN ; Huhn CHOE
Korean Journal of Anesthesiology 1995;29(4):558-565
IIn a randomized double-blind study, postoperative pain was assessed in 60 patients undergoing gynecologic surgery with three types of anesthesia; inhalation anesthesia only (enflurane-N2O-O2-vecuronium)(G); inhalation anesthesia with local infiltration (infiltration of the abdominal wall with 40 ml 0.25% bupivacaine along the line of the proposed incision)(GI); and inhalation anesthesia with epidural analgesia (morphine 2 mg mixed with 10 ml 0.125% bupivacaine)(GE). The severity of constant incisional pain, movement-associated incisional pain, and pain upon pressure applied to the surgical wound using 5 pounds of weight was assessed with a visual analogue scale at 2, 6, 12, 24, and 48 hours after surgery. The duration of analgesia (time from the end of the surgery to the first request for analgesic) was 7.9+/-3.1 hours in group G, 22.8+/-4.8 hours in group GI, and 33.1+/-3.9 hours in group GE, with statistically significant differences between group G and other two groups. Forced vital capacity (FVC), peak expiratory flow, and forced expiratory volume in 1 second (FEV1) were measured with the patients in a semisitting position. In all groups, there were no differences in above parameters, These results indicate that postoperative pain after lower aMominal surgery would be managed satisfactorily with infiltration of local anesthetic as well as epidural analgesia.
Abdominal Wall
;
Analgesia
;
Analgesia, Epidural
;
Anesthesia
;
Anesthesia, Inhalation
;
Bupivacaine*
;
Double-Blind Method
;
Female
;
Forced Expiratory Volume
;
Gynecologic Surgical Procedures
;
Humans
;
Morphine*
;
Pain, Postoperative
;
Vital Capacity
;
Wounds and Injuries
3.Corrosion Behaviors of Dental Implant Alloy after Micro-sized Surface Modification in Electrolytes Containing Mn Ion
Jung In KANG ; Mee Kyoung SON ; Han Cheol CHOE
Journal of Korean Dental Science 2018;11(2):71-81
PURPOSE: The purpose of this study was to investigate the corrosion behaviors of dental implant alloy after micro-sized surface modification in electrolytes containing Mn ion. MATERIALS AND METHODS: Mn-TiO₂ coatings were prepared on the Ti-6Al-4V alloy for dental implants using a plasma electrolytic oxidation (PEO) method carried out in electrolytes containing different concentrations of Mn, namely, 0%, 5%, and 20%. Potentiodynamic method was employed to examine the corrosion behaviors, and the alternating-current (AC) impedance behaviors were examined in 0.9% NaCl solution at 36.5℃±1.0℃ using a potentiostat and an electrochemical impedance spectroscope. The potentiodynamic test was performed with a scanning rate of 1.667 mV s⁻¹ from −1,500 to 2,000 mV. A frequency range of 10⁻¹ to 10⁵ Hz was used for the electrochemical impedance spectroscopy (EIS) measurements. The amplitude of the AC signal was 10 mV, and 5 points per decade were used. The morphology and structure of the samples were examined using field-emission scanning electron microscopy and thin-film X-ray diffraction. The elemental analysis was performed using energy-dispersive X-ray spectroscopy. RESULT: The PEO-treated surface exhibited an irregular pore shape, and the pore size and number of the pores increased with an increase in the Mn concentration. For the PEO-treated surface, a higher corrosion current density (I(corr)) and a lower corrosion potential (E(corr)) was obtained as compared to that of the bulk surface. However, the current density in the passive regions (I(pass)) was found to be more stable for the PEO-treated surface than that of the bulk surface. As the Mn concentration increased, the capacitance values of the outer porous layer and the barrier layer decreased, and the polarization resistance of the barrier layers increased. In the case of the Mn/Ca-P coatings, the corroded surface was found to be covered with corrosion products. CONCLUSION: It is confirmed that corrosion resistance and polarization resistance of PEO-treated alloy increased as Mn content increased, and PEO-treated surface showed lower current density in the passive region.
Alloys
;
Corrosion
;
Dental Implants
;
Dielectric Spectroscopy
;
Electric Impedance
;
Electrolytes
;
Manganese
;
Methods
;
Microscopy, Electron, Scanning
;
Plasma
;
Spectrum Analysis
;
X-Ray Diffraction
4.Effect of various intraoral repair systems on the shear bond strength of composite resin to zirconia.
In Hae HAN ; Dong Wan KANG ; Chae Heon CHUNG ; Han Cheol CHOE ; Mee Kyoung SON
The Journal of Advanced Prosthodontics 2013;5(3):248-255
PURPOSE: This study compared the effect of three intraoral repair systems on the bond strength between composite resin and zirconia core. MATERIALS AND METHODS: Thirty zirconia specimens were divided into three groups according to the repair method: Group I- CoJet(TM) Repair System (3M ESPE) [chairside silica coating with 30 microm SiO2 + silanization + adhesive]; Group II- Ceramic Repair System (Ivoclar Vivadent) [etching with 37% phosphoric acid + Zirconia primer + adhesive]; Group III- Signum Zirconia Bond (Heraus) [Signum Zirconia Bond I + Signum Zirconia Bond II]. Composite resin was polymerized on each conditioned specimen. The shear bond strength was tested using a universal testing machine, and fracture sites were examined with FE-SEM. Surface morphology and wettability after surface treatments were examined additionally. The data of bond strengths were statistically analyzed with one-way ANOVA and Tamhane post hoc test (alpha=.05). RESULTS: Increased surface roughness and the highest wettability value were observed in the CoJet sand treated specimens. The specimens treated with 37% phosphoric acid and Signum Zirconia Bond I did not show any improvement of surface irregularity, and the lowest wettability value were found in 37% phosphoric acid treated specimens. There was no significant difference in the bond strengths between Group I (7.80 +/- 0.76 MPa) and III (8.98 +/- 1.39 MPa). Group II (3.21 +/- 0.78 MPa) showed a significant difference from other groups (P<.05). CONCLUSION: The use of Intraoral silica coating system and the application of Signum Zirconia Bond are effective for increasing the bond strength of composite resin to zirconia.
Ceramics
;
Collodion
;
Phosphoric Acids
;
Polymers
;
Silicon Dioxide
;
Wettability
;
Zirconium
5.The Effect of Preemptive Analgesia with Morphine, Ketorolac, Droperidol.
Kyoung Hag OH ; Jin Song KIM ; Seung Hoon KO ; Young Jin HAN ; Huhn CHOE
Korean Journal of Anesthesiology 1996;30(3):327-332
BACKGROUND: Several reports have suggested that preoperative nociceptive block with opioids and nonsteroidal antiinflammatory drugs (NSAIDs) may reduce postoperative pain. This study evaluated the effects of preemptive analgesia, the analgesic efficacy and safety of intravenous opioids and NSAIDs during the first 48 hours after lower abdominal surgery. METHODS: The 40 patients were randomized to either preemptive group or postincisional group. All subjects received IV bolus of 2 mg of morphine followed by continuous IV mixture (morphine 30 mg + ketorolac 90 mg + droperidol 2 mg in 90 ml of normal saline) via Baxter 2-Day Infusor(R). Evaluations included supplementary analgesics, analgesic pain assessment (visual analogue scale, VAS), time of first analgesic request, patient comfort (comfort scale), and side effects. RESULTS: There were no differences in number of patient requiring supplemental analgesic (3/20 vs 5/20), the time of first analgesic request (42.2 hours vs 37.5 hours), pain scores measured at each time, and patient comfort between two groups. There were minor complications such as nausea and somnolence in both groups, but no patients needed any treatment. CONCLUSIONS: Preemptive or postincisional morphine-ketorolac-droperidol infusion was equally effective for postoperative analgesia after lower abdominal surgery with minor complications. Further evaluation may be needed to determine whether preemptive analgesia has any advantages over postincisional analgesia.
Analgesia*
;
Analgesics
;
Analgesics, Opioid
;
Anti-Inflammatory Agents, Non-Steroidal
;
Droperidol*
;
Humans
;
Ketorolac*
;
Morphine*
;
Nausea
;
Pain Measurement
;
Pain, Postoperative
6.Outcome of Resuscitation Attempts in Victims with Non Traumatic Out-of-Hospital Cardiac Arrest.
Sung Oh HWANG ; Kyoung Soo LIM ; Young Sik KIM ; Boo Soo LEE ; Moo Eob AHN ; Kang Hyun LEE ; Jung Han YOON ; Keum Soo PARK ; Kyung Hoon CHOE
Korean Circulation Journal 1994;24(6):861-869
BACKGROUND: In korea, significant proportion of victims with out-of-hospital cardiac arrest have no change to survive because some physicians regard the victim with cardiac arrest outside the hospital as the dead and they do not attempt cardiopulmonary resuscitation(CPR). And we cannot expect bystander-initiated CPR and emergency medical system in resuscitating the victims with cardiac arrest. We studies the outcome of resuscitation attempts and the factor associated with survival in patients with out-of-hospital cardiac arrest in current situation of emegency medical system. Method: We attempted cardiopulmonary resuscitation(by standard guidelines) in 74 consecutive victims with non-traumatic out-of-hospital cardiac arrest in emergency department. RESULTS: Of 74 victims with cardiac arrest 35(47%) had no any restoration of spotaneous circulation(ROSC), 26(35%) had transient ROSC but died within 24 hours,6(8%) survived over 24 hours but died in the hospital, and 7(10%) discharged alive. Factors associated with survival were cardiac origin as a cause of cardiac arrest, ventricular fibrillation as a initial ECG rhythm, and short circulatory arrest time. CONCLUSION: Survival rate of victims with non-traumatic out-of-hospital cardiac arrest was 10%. Considering the feasibility to survive, CPR should be attempted in patients with out-of-hospital cardiac arrest if do-no-resusciate(DNR) is not indicated.
Cardiopulmonary Resuscitation
;
Electrocardiography
;
Emergencies
;
Emergency Service, Hospital
;
Heart Arrest
;
Humans
;
Korea
;
Out-of-Hospital Cardiac Arrest*
;
Resuscitation*
;
Survival Rate
;
Ventricular Fibrillation
7.The Factors to Influence on Immediate Elastic Recoil after Percutaneous Transluminal Coronary Angioplasty.
Kwang Seon SONG ; Yong Gyu LEE ; Kyoung Gu YOH ; Yun Kyung CHO ; Jung Han YOON ; Keum Soo PARK ; Kyung Hoon CHOE
Korean Circulation Journal 1994;24(3):466-473
BACKGROUND: Elastic recoil contributes to the residual lumen reduction immediately after PTCA. We evaluated the factors to influence on immediate elastic recoil after the successful PTCA. METHODS: 88 patients(96 lesions) were studied by quantitative angiography. Angiograms were obtained in two identical near orthogonal projection before PTCA and immediately after the last balloon deflation. RESULTS: Immediately after PTCA, minimal luminal diameter increased from 0.7+/-0.6mm to 1.9+/-0.6mm and percent diameter stenosis was reduced from 77+/-20 to 34+/-21%. The calculated mean elastic recoil was 0.5+/-0.7mm in diameter and % elastic recoils were lesser both in calcified(3+/-23 vs 23+/-24%, p=0.04) and thrombotic(9+/-20 vs 23+/-35%, p=0.02) lesions. The elastic recoil increased significantly according to the inflation diameter of balloon(r=0.32, p<0.01. No significant correlation between the immediate elastic recoil and age, sex, risk factors, eccentricity and lesion length was shown. CONCLUSION: The elastic recoil immediately after a successful PTCA was dependent on the existance of calcium and thrombus on the target lesion and on the balloon size at the maximal inflation.
Angiography
;
Angioplasty, Balloon, Coronary*
;
Calcium
;
Constriction, Pathologic
;
Inflation, Economic
;
Phenobarbital
;
Risk Factors
;
Thrombosis
8.Successful resuscitation of prehospital sudden cardiac death induced by variant angina: a case report.
Sung Oh HWANG ; Moo Eob AHN ; Young Sik KIM ; Kyoung Soo LIM ; Jung Han YOON ; Keum Soo PARK ; Kyung Hoon CHOE
Journal of the Korean Society of Emergency Medicine 1992;3(1):85-91
No abstract available.
Death, Sudden, Cardiac*
;
Resuscitation*
9.Detection of tumor-associated human papillomavirus infections using in situ hybridization and polymerase chain reaction in Korean women cervices.
Doo Han KWON ; Young Hee LEE ; Dong Hwa LEE ; Sang Heun CHA ; Yong Kyoung CHOE ; Soon Hee PARK ; In Seong CHOI ; Tae Wha CHUNG
Journal of the Korean Society of Virology 1993;23(1):27-38
No abstract available.
Female
;
Humans*
;
In Situ Hybridization*
;
Papillomavirus Infections*
;
Polymerase Chain Reaction*
10.A case of subclavian stenosis treated by percutaneous transluminal angioplasty.
Byung Su YOO ; Kyoung Gu YOH ; Hyee Seung HONG ; Seung Ok CHOI ; Kwang Hoon LEE ; Jung Han YOON ; Kyung Hun CHOE ; Jin Hyun PARK
Korean Journal of Nephrology 1992;11(3):297-300
No abstract available.
Angioplasty*
;
Constriction, Pathologic*