• KSCE Journal of Civil and Environmental Engineering Research
• /
• v.28 no.6C
• /
• pp.321-329
• /
• 2008

In this study, a series of column test as a way in order to make up for the weakness point of the conventional acceleration method were conducted to both propose the suction board drain method and grapes the specific improvement character of this method as a result of a sort of plastic drain board and a phase of vacuum pressure conditions. On this occasion, the study focused on computing the effective factors of the fittest Suction board drain method affected by each condition through confirming the settlement generated during the test, the water content reduction and stress increase effect occurred arising from the test, and the ratio of consolidation related to the improvement period. In accordance with the shape of core and that whether the core is attached to the filter(pocket or adhesion), the castle type of adhesion and the column type of pocket are more efficient than the others as a consequence of the test to find out the improvement effect depending on each drainage such as a castle type, coil type, harmonica type, column type of pocket and a castle of the adhesion. In case of the step suction pressure, the shorter the period of $-0.8\;kg/cm^2$ as a final step of the suction pressure is, the better the improvement is. In addition, the correlation between degree of consolidation per each suction pressure level and duration of application was drawn as a curve and the point of inflection on this curve was provided to determine the duration period to maximize the consolidation.

• Archives of Plastic Surgery
• /
• v.38 no.3
• /
• pp.241-244
• /
• 2011

Purpose: Seroma formation is still major complication of abdominal donor site after TRAM flap surgery in spite of various efforts to reduce seroma formation such as closed suction drain. We performed a clinical study, that quilting suture at abdominal donor site can prevent seroma formation. Methods: Between May 2002 and September 2008, we performed 600 breast reconstructions using a unilateral TRAM flap except patients who has smoking history or abdominal scar. We performed 300 breast reconstructions without quilting sutures (A: Experimental group) until January 06, and after then 300 reconstructions with quilting sutures (B: Control group). We compared total drain output (mL), time to drain removal (days), and donor site complications between two groups. Results: There were no statistical difference at BMI (p=0.28) and time to remove suction drain between two group. (A: 8.37, B: 9.69) (p=0.40) But, total drain output was reduced with quilting suture. (A: 432.5, B: 495.2) (p=0.005) And also complication rate was decreased, such as seroma formation, epigastric bulging. (A: 1%, B: 7%) (p=0.005) Conclusion: Quilting suture is a simple and reliable method to reduce seroma formation and abdominal donor site complication.

• Archives of Plastic Surgery
• /
• v.43 no.3
• /
• pp.288-290
• /
• 2016

We propose a safe, simple, and novel method to harvest fat using a standard liposuction cannula and a Redivac or alternative closed-suction drain. The authors have used this technique for both 'dry' and 'wet' liposuction. This technique is both easy to perform and cost-effective whilst providing both a silent and relatively atraumatic fat harvest. The lower negative pressure compared with traditional harvesting systems likely preserves fat integrity for lipofilling. This method maximises resources already held within a hospital environment.

• Journal of Korean Neurosurgical Society
• /
• v.58 no.1
• /
• pp.76-78
• /
• 2015

This report details a case of unexpected, severe post-operative cerebral edema following cranioplasty. We discuss the possible pathological mechanisms of this complication. A 50-year-old female was admitted to our department with sudden onset of stuporous consciousness. A brain computed tomography (CT) revealed a subarachnoid hemorrhage with intracranial hemorrhage and subdural hematoma. Emergency decompressive craniectomy and aneurysmal neck clipping were performed. Following recovery, the decision was made to proceed with an autologous cranioplasty. The cranioplasty procedure was free of complications. An epidural drain was placed and connected to a suction system during skin closure to avoid epidural blood accumulation. However, following the procedure, the patient had a seizure in the recovery room. An emergency brain CT scan revealed widespread cerebral edema, and the catheter drain was clamped. The increased intracranial pressure and cerebral edema were controlled with osmotic diuretics, corticosteroids, and antiepileptic drugs. The edema slowly subsided, but new low-density areas were noted in the brain on follow-up CT 1 week later. We speculated that placing the epidural drain on active suction may have caused an acute decrease in intracranial pressure and subsequent rapid expansion of the brain, which impaired autoregulation and led to reperfusion injury.

• Proceedings of the Korean Radioactive Waste Society Conference
• /
• 2018.11a
• /
• pp.183-184
• /
• 2018

• Proceedings of the Korean Society of Agricultural Engineers Conference
• /
• 2003.10a
• /
• pp.179-182
• /
• 2003

The purpose of this paper was to investigate the soil-water characteristic curves for unsaturated soil. To this ends, a series of suction measured test was conducted on the selected 4 kinds of soil which is located in Korea, used the modified pressure plate apparatus. From the test results, the water contents, degree of saturation and volumetric water contents was analyzed with the suction. And was drawn the soil-water characteristic curves was drain from the test results for various factors.

• Archives of Plastic Surgery
• /
• v.45 no.1
• /
• pp.98-98
• /
• 2018

• Proceedings of the Acoustical Society of Korea Conference
• /
• 1994.06a
• /
• pp.716-721
• /
• 1994

The goal of this study is to develop treatment methods for improving the noise quality of Home Appliance Drain Pumps. Developed treatment methods covers the various methods including the control of the water level through the developed electronic circuity and the various modifications over the design of impeller and fan units. In the first part of the studies Dominant noise sources of the pumps are analyzed. Specific noise problems of the pumps are classified on the basis of mechanic and magnetic origins. Factors including the pressure variations at suction head, magnetic interactions with structure, specific fan noises are studied sequentially. The second part of the studies are considered for development and application of treatment methods. Results denoted the basic problems and ways to improve the noise quality by treating the dominant soureces of drain pumps.

• Journal of the Korean Geotechnical Society
• /
• v.38 no.2
• /
• pp.5-13
• /
• 2022

The unsaturated behavior of sandy silt (SM soil) was investigated experimentally. Special attention was given to the stress-strain behavior of unsaturated weathered soil (SM) prior to failure and behavior at failure under monotonic loading. A sandy silt (SM) weathered soil containing a certain amount of fine contents distributed in Korea, was chosen to form samples with different densities of Dr=25%, 60%, and 75%. and matric suctions. The isotopically Consolidated Drain test (CD-test) was performed to maintain a constant matric suction during the shearing process. Based on the experimental results, it was qualitatively identified that the higher the relative density, the greater the virtual friction angle (ϕ^b) value and AEV (Air Entry Value) were induced. Also it is found that the internal friction angle (ϕ') is more or less constant. even if the matric suction is increased.

• Journal of Korean Foot and Ankle Society
• /
• v.8 no.1
• /
• pp.26-30
• /
• 2004

Purpose: The infected diabetic foot patients were reviewed to analyze the result of new dressing methods using a wall-suction instruments. Materials and Methods: Eighteen patients treated with wall-suction assisted vacuum dressing were included. After debridement under local anesthesia, a sponge pad, a drain, and a surgical drape were used to seal the wound. Negative pressure applied by the wall-suction at around 200 mmHg and dressing were repeated in every two to three days. The results of repeated wound cultures, growth of granulation tissues, and CRP level were closely observed on the regular basis. Results: Rapid growth of granulation tissues was noticed around the wound in 16 cases. No organism was obtained in an average 5 days and wound coverage was possible in an average 18 days. The CRP level returned to normal in an average 4 weeks. Two patients with end stage renal disease, who were regularly hemodialised, underwent major amputation. Conclusion: New dressing method has the following advantages: a rapid wound improvement in the patients with infected diabetic foot, less expensive, less painful, impediment of bacterial contamination in the hospital room. However, further study will be needed for the end stage renal disease patients.