• Journal of Chest Surgery
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• v.32 no.4
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• pp.379-382
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• 1999

Background: There are several advantages to the ministernotomy approach. The skin incision is much smaller than the traditional median sternotomy incision. This approach allows the patients to return to normal life more quickly and provide them with good self-image. Material and Method: From April to July 1998, we performed a ministernotomy via lower half sternum in 25 patients. There were 10 males(40%) and 15 females(60%) with a mean age of 30${\pm}$16 years(range 3 to 55 years). The body surface area ranged from 0.58 to 1.9 m2(mean 1.5 to 0.4 m2). A vertical skin incision of 11cm in mean length was made in the midline over the sternum extending inferiorly from the third intercostal space. The sternum was divided vertically in the midline from the xyphoid process to the level of second intercostal space using a standard saw and then transversely to the left(n=17) or to both sides(n=4) of the second intercostal space using an oscillating saw. The sternum was divided vertically only in children (n=4). Result: The ministernotomy was used in 25 consecutive patients undergoing mitral valve replacement(n=10), repair of ventricular septal defect(n=4) and atrial septal defect(n=11). There was no significant complication related to ministernotomy. The mean ICU stay time 20 hours. Patient and family acceptance was very high. Conclusion: We concluded that minimally invasive cardiac surgery via ministernotomy can be done safely. These methods may benefit the patients with lesser discomfort, smaller incision, and earlier ICU discharge than the traditional incision.

• Journal of Oral Medicine and Pain
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• v.37 no.3
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• pp.147-154
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• 2012

Hematopoietic stem-cell transplantation (HSCT) is a treatment for immune deficiency, autoimmune diseases, and hematopoietic malignancies. The main complication of allogenic HSCT is graft-versus-host disease (GVHD). Oral mucosal biopsy is needed for a definitive diagnosis and treatment planning of GVHD, but this procedure causes bleeding and bacteremia in a poor general condition. We evaluated the efficacy of laser-assisted biopsy as a minimally invasive treatment. Three cases were described in this article. All patients' medical records, clinical photographs, and histopathologic findings were reviewed. All patients felt comfortable and no severe complications occurred. The quality of the obtained biopsy material was adequate for a definitive diagnosis of GVHD. Laser-assisted, minimally invasive biopsy of the oral mucosa does not cause bleeding, and it reduces the chances of infection, bacteremia, and postoperative scarring compared to the usual histopathologic biopsy procedure. It would thus be advantageous to use this procedure to biopsy GVHD patients.

• Journal of the Korean Arthroscopy Society
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• v.13 no.1
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• pp.46-52
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• 2009

Purpose: To evaluate the usefulness of minimally invasive arthroscopy-assisted plate removal of a laterally inserted periarticular distal femur plate used for the treatment of AO type-C distal femur fractures. Materials and Methods: From October 2002 to November 2005, we evaluated 17 patients whose plates were removed through minimally invasive arthroscopy-assisted plate-removal technique and 15 patients who got their plates removed through conventional method without using arthroscopy, 32 patients in total. All these patients included in this study initially underwent open reduction and internal fixation of the distal femoral fractures with a lateral plate, and complained of continued pain over the lateral femoral condyle after the fracture fixation. The average age was 42.6 (ranges: 20~66) and initial fracture types included 16 cases of C1, 11 cases of C2, and 5 cases of C3 following AO/ASIF classification guidelines. Measured outcomes included: associated intra-articular pathologies, time needed to return to activities of daily living, patients' overall satisfaction, complications following the removal of hardware, and pain before and 6 months after the operation. Results: The distal-most end of the plate was placed in the knee joint in all cases and damage of the lateral articular capsule was found in 23 cases. Continuous wound discharge after surgery was found in one case who underwent arthroscopy-assisted plate removal, and it was treated by irrigation and re-suture. Average time needed to return to activities of daily living was 7 days in arthroscopy assisted group and 7.6 days in conventionally removed group. Fourteen patients (82.4%) who underwent arthroscopyassisted plate-removal reported above 'fair' satisfaction and the Visual analog scale pain score decreased from 4.9 to 1.9, six months after the plate removal. Thirteen patients(86.7%) who underwent conventional plate removal reported above 'fair' satisfaction and the Visual analog scale pain score decreased from 5.2 to 2.5, six months after the operation. Conclusion: Through minimally invasive arthroscopic-assisted plate removal, intrarticular pathology of the knee joint was able to be simultaneously identified and treated at the time of hardware removal. Damage of lateral capsule of the knee joint caused by the inserted plate for the treatment of type C distal femoral fracture was very frequently found and following the plate removal, patients experienced an improvement in pain score. We therefore recommend routine lateral distal femoral plate removal if the bony union is attained in such cases as type C distal femoral fractures whose distal most end of the plates are located in the joint.

• Journal of Sensor Science and Technology
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• v.12 no.5
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• pp.225-230
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• 2003

Nowadays, laserthermia is widely used to treat malignant tumors with generating heat as the one of minimal invasive surgeries. Generally, the laserthermia probe system consists of the fiber-optic laser and light guides, image guide and temperature sensor. It is very important to measure the temperature of treating tumor and make a stable temperature ($42{\sim}43^{\circ}C$) during the treating time. Therefore, laserthermia probe needs temperature sensor which can measure it exactly and fast. In this study, to develop a new type of temperature sensor with LC(liquid crystal) and optical fiber, the reflectivity of LC according to the temperature changes are measured. Also, the relationships are derived from the results.

• Journal of Chest Surgery
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• v.38 no.7 s.252
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• pp.507-509
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• 2005

Open heart surgery via right thoracotomy can be accomplished in atrial septal defects, and mitral valve diseases. Recently, thoracoscopic atrial septal defect closure, mitral valve repair, Maze operation, and minimal invasive direct coronary artery bypass (MIDCAB) are accomplished with AESOP 3000. However, there is no report of thoracoscopic aortic valve replacement in Korea. We report a successful thoracospic aortic valve replacement assisted with AESOP 3000 in a 31-year-old female patient.

• Proceedings of the KSME Conference
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• 2007.05a
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• pp.378-383
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• 2007

As the Minimally Invasive Surgery (MIS) is developed, an interventional procedure becomes the major of the spine surgery in the world. Despite of the use of the expensive medical equipments, the success chance of the nucleoplasty is about 30%. The reason is that the shape of the cannular needle is similar to that of the conventional injector and looks like the straight. Because the tip of these straight needles is not able to reach in the vicinity of the disc bulging or the protrusion, which are the cause of the low back pain and because the far indirect plasma discharge results in the decompression, the nucleoplasty has the limit. Many incurable diseases has not been solved due to the unexistence of the advanced technique for the MIS human body cannula device. If 3-D direction controllable cannular catheter (whose direction is accurately controlled after inserting into the bodies to cure the lesion) is developed, it is expected that new devised cannular catheter can cure many incurable diseases simultaneously. Therefore, the aims of this research are to develop the new devised cannular catheter of SMA direction controller for the medical situation, which has been produced through many previous trial-error procedures, and to produce the commercial medical device.

• Journal of the korean academy of Pediatric Dentistry
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• v.39 no.2
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• pp.199-205
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• 2012

Although the stainless steel crowns have been recognized as the most effective and durable form of restoration for primary molars, they have been regarded by many dentists as having definite demerits such as invasive nature of procedural complexity and behavioral aspects of children. As an alternative to conventional technique of stainless steel crown restoration, the Hall technique was first introduced in 1988, which is characterized by just pushing the pre-contoured, cement filled crown form onto the abutment molar with no local anesthesia, no caries removal, no tooth preparation. According to several reports, this can slow, arrest, or even reverse the progress of caries. In addition, its atraumatic feature gives less discomfort and stress to children than conventional one, which is thought excellent especially in younger children. Also, It has been reported to be effective and acceptable to dentist, child patients and their parents. In this case study, three children with age of 4 years 5 months, 4 years 10 months, 6 years 4 months were treated with stainless steel crowns using Hall technique on first primary molar respectively. The teeth were free from pulpal, periapical pathology. After follow up of about 3 to 6 months period, the results showed clinically successful outcomes without any marked complication in pulp, tooth or soft tissue till now. But, it should be kept in mind that this technique is not proper to every child, every carious molar, or every dentist. Thorough distinction of indicated cases and continuous follow-up check is highly required. Conclusively, Hall technique might be an effective and realistic minimally invasive alternative for the carious primary molars especially in younger or disabled children, despite potential doubts on its efficacy and some definite limitations.

• Journal of Chest Surgery
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• v.39 no.9 s.266
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• pp.733-738
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• 2006

The prevalence of gastroesophageal reflux disease has been increased recently in Korea. The use of minimally invasive laparoscopic and thoracoscopic surgery has become popular in the operation of esophageal disease such as esophageal cancer or gastroesophageal reflux disorder. We experienced three cases of laparoscopic Nissen fun-doplications and one case of laparoscopic Collis gastroplasty, and we will describe the technical aspect of these surgeries.

• Journal of the korean academy of Pediatric Dentistry
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• v.44 no.2
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• pp.235-242
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• 2017

Marsupialization and decompression constitute a well-established procedure for treating cavitary bone lesions of the jaw. The technique can be a primary treatment option, especially for pediatric patients with large cysts or lesions involving vital anatomical structures, such as a developing tooth germ. In this procedure, a decompression stent, such as a customized acrylic obturator or space-maintaining appliance, silicone tube, or nasal cannula, is inserted to maintain the patency of the cyst. However, this may cause clinical problems, such as irritation or trauma to the adjacent tissues, as well as discomfort to the patient, or failure of the stent due to cyst shrinkage. It can also be a reason for patient noncompliance. In the cases described here, a minimally invasive marsupialization technique using a metal tube made from a 16-gauge needle was used for odontogenic cysts in pediatric patients associated with unerupted teeth. Through this method, the lesions were removed, with patient cooperation, and the cyst-associated teeth erupted spontaneously.

• Clinics in Shoulder and Elbow
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• v.11 no.2
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• pp.165-171
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• 2008

Purpose: The purpose of this study was to introduce a new surgical technique and to evaluate the preliminary results after operative treatment with using TightRope$^{(R)}$ for treating acute acromioclavicular joint dislocation. Material and Methods: We studies 10 patients who were followed up for more than 6 months after operative treatment with using an TightRope$^{(R)}$. A longitudinal incision approximately 4cm in length was made from 1cm medial to the acromioclavicular joint to the coracoid process, and then coracocalvicular ligament augmentation using TightRope$^{(R)}$ was done after splitting the deltoid. For postoperative stability, two 1.6 mm Kirschner wires were inserted temporarily across the acromioclavicular joint in all cases. The radiologic results on the serial plain radiographs and the clinical results according to the UCLA score were analyzed. Results: Radiologically, 7 cases showed anatomical reduction, 2 cases showed a slightly loss of reduction and 1 case showed partial loss of reduction. Clinically, 6 cases were excellent, 3 cases were good and 1 case was fair. Conclusion: Coracoclavicular ligament augmentation using TightRope$^{(R)}$ for treating acute acromioclavicular joint dislocation is a minimally invasive, safe procedure that provides satisfactory radiologic and clinical preliminary results. Yet the long-term results have to be analyzed to determine the final results of this procedure.