• 제어로봇시스템학회:학술대회논문집
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• 1997.10a
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• pp.1536-1540
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• 1997

Recently, many advanced technologies in electronics, mechanics, material and computer science have been applied to medictine and they have changed the method of diagnosis and treatment to more quantitative way than before. Now day, with the aid of this technology, the device for the minimal invasive diagnosis and treatment is being developed for the convenience and safety of patients. this paper introduces application of senso and MEMS(Micro Electro Mechnical System) in medicine and biotechnology, which are essential factor for the realization of minimal invasive diagnosis and treatment.

• The Journal of Korean Academy of Orthopedic Manual Physical Therapy
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• v.11 no.2
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• pp.83-95
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• 2005

The purpose of this study is to analyze, durability of motor effort after finishing rehabilitation program and the influence from the isotonic lumbar region extension exercise after an operation according to the different operation way in invasive degrees. We selected randomly 80 patients who have no complication and musculoskeletal system diseases with finishing the 12 weeks' rehabilitation program after getting laser discectomy, but fail to conservative treatment, about Lumbar HNP, and divided into minimal invasive groups 38 and invasive groups 42 for study. As the results, in minimal invasive group, after finishing cure and 6 months later, the degree of hold muscle of women is much better than that of men. but in Invasive group, that of men is better than that of women, in case of women, the $0^{\circ}$ and $72^{\circ}$ in lumbar flexion angle have weaken or no improvement than before beginning exercise. and muscle force in $72^{\circ}$ in lumbar flexion angle increased to all men and women than before beginning exercise in Minimal invasive group. but in invasive group. it decreased. When analyze the lapsed time in Minimal invasive group, the groups who start the exercise within 3 months are better than the groups who start the exercise above 3 months after an operation the hold muscle degree all angles after finishing cure and 6 months later. Meanwhile, in invasive group, the groups who start the exercise within 3 months are better than the groups who start the exercise above 3 months after an operation about the hold muscle degree in 36-72 of lumbar flexion angle but 0-36 are not good after finishing cure and 6 months later. When analyze BMI in Minimal invasive group, the normal groups are better than the overweight groups about hold muscle degree in all angles after finishing cure and 6 months later.

• Journal of Chest Surgery
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• v.33 no.1
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• pp.96-98
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• 2000

A cosmetic incision for minimal invasive cardiac surgery is described. Through a small submammary skin incision combined with partial low sternotomy some kinds of cardiac operations are possible without extra-difficulty but with excellent cosmetic effect, No special instruments nor techniques are required. By this method routine cannulations for cardiopulmonary bypass as well as aortic cross clamping bicaval snaring and venting of cardiac chambers are possible, We performed 5 cases of open heart surgeries using this approach which includes two cases of atrial septal defect closure one case of ventricular septal defect closure one case of pulmonic valvotomy and one case of mitral valve replacement.

• Proceedings of the KSME Conference
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• 2003.11a
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• pp.1470-1475
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• 2003

The senses that a doctor can feel is limited in MIS(Minimal Invasive Surgery) which guarantees the fast recovery of the patient and minimal incision for going in and out of instruments through the tissue of the patient. In particular, the surgical robotic teleoperation system developed recently serves with only the information of eyesight and auditory sense. Therefore force-reflection is the most demanded element of the senses in manipulating surgical instruments. In this paper, we designed the Master system and the 2 D.O.F grasper for the robotic teleoperation system(Slave) that has two force sensors on the grasper. Particularly, we focused on serve to master's handle with the contact force between tissue and the grasper of Slave.

• Advances in pediatric surgery
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• v.17 no.2
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• pp.111-124
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• 2011

• The Korean Journal of Physiology and Pharmacology
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• v.22 no.3
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• pp.291-300
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• 2018

The purpose of the present work is to establish an ultra-minimal invasive percutaneous puncture inoculation method for a VX2 orthotopic lung cancer rabbit model with fewer technical difficulties, lower mortality of rabbits, a higher success rate and a shorter operation time, to evaluate the growth, metastasis and apoptosis of tumor by CT scans, necropsy, histological examination, flow cytometry and immunohistochemistry. The average inoculation time was 10-15 min per rabbit. The tumorbearing rate was 100%. More than 90% of the tumor-bearing rabbits showed local solitary tumor with 2-10 mm diameters after two weeks post-inoculation, and the rate of chest seeding was only 8.3% (2/24). The tumors diameters increased to 4-16 mm, and irregularly short thorns were observed 3 weeks after inoculation. Five weeks post-inoculation, the liquefaction necrosis and a cavity developed, and the size of tumor grew further. Before natural death, the CT images showed that the tumors spread to the chest. The flow cytometry and immunohistochemistry indicated that there was less apoptosis in VX2 orthotopic lung cancer rabbit model compared to chemotherapy drug treatment group. Minimal invasive percutaneous puncture inoculation is an easy, fast and accurate method to establish the VX2 orthotopic lung cancer rabbit model, an ideal in situ tumor model similar to human malignant tumor growth.

• Archives of Plastic Surgery
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• v.34 no.1
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• pp.123-127
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• 2007

Purpose: Rigid external distraction(RED) is a highly effective technique for correction of maxillary hypoplasia in patients with cleft or syndromic craniosynostosis. Despite many advantages of RED, it also has the problem of relapse as the conventional advancement surgery. Bicoronal approach, that is the common approach to gain access to the craniofacial skeleton, had some morbidity, such as hair loss, sensory loss, wide scar and temporal hollowing. We present our clinical experience of RED distraction with minimal invasive approach and early rigid fixation to overcome these disadvantages. Methods: A 27-year-old female patient with Crouzon's disease underwent Le Fort III osteotomy and RED device application through the minimal invasive direct skin incisions. After the latent period of 5 days, distraction was undertaken until proper convexity and advancement were obtained. During the rigid retention period, inflammation occurred on the right cheek, and proper conservative managements were done including continuous irrigation. To maintain the stability of distraction, early rigid fixation was undertaken on the osteotomy sites through another skin incisions. Preoperative and postoperative orthodontic treatments were performed. Serial photographs and cephalometric radiographs were obtained preoperatively, after distraction and 6 months after distraction. Results: The cephalometric analysis demonstrated postoperatively significant advancement of the maxilla and improvement of facial convexity. After 6-month follow-up period, the maxilla was stable in the sagittal plane and no relapse was found. Facial scars were not noticeable and other deformity and morbidity did not occur. Conclusion: This effective and stable technique will be a good alternative for the patients who need large amount of distraction and for adult patients with severe maxillary hypoplasia or syndromic craniosynostosis.

• The Journal of the Korean bone and joint tumor society
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• v.11 no.1
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• pp.17-24
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• 2005

Local treatment for tumors has developed from extended radical surgery to function preserving surgery on the basis of modern biology. With the development of minimally invasive technique, it changed to be minimal-invasive surgery. And nowadays technical revolution made non-invasive surgery possible with appearance of several kinds of non-surgical knives such as gamma knife, cyber knife, and HIFU (high intensity focused ultrasound) knife. In this article, history, HIFU machine and treatment procedure, histological change and its mechanism, clinical applications, advantage, disadvantage, and future prospect of extracorporeal high intensity focused ultrasound therapy using HIFU knife will be reviewed.

• Journal of Korean Foot and Ankle Society
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• v.15 no.1
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• pp.47-50
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• 2011

Equinus contracture of the gastrocnemius-soleus complex is associated with many foot and ankle diseases. We introduce a new simple technique that can be performed using a minimal incision with simple devices. Briefly, 0.5 cm sized medial and lateral longitudinal skin incisions are made at the level of the distal one third of the calf. The musculotendinous junction of the gastrocnemius is gently transected using an Arachnoid blade. The skin is, then, closed with non-absorbable sutures.

• 대한족부족관절학회:학술대회논문집
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• 2008.11a
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• pp.49-49
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• 2008