• 로봇학회논문지
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• 제17권1호
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• pp.8-15
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• 2022

In this paper, we proposed the method of virtual reality-based surgical navigation to reproduce the pre-planned position and angle of the pedicle screw in spinal fusion surgery. The goal of the proposed method is to quantitatively save the surgical plan by applying a virtual guide coordinate system and reproduce it in the surgical process through virtual reality. In the surgical planning step, the insertion position and angle of the pedicle screw are planned and stored based on the virtual guide coordinate system. To implement the virtual reality-based surgical navigation, a vision tracking system is applied to set the patient coordinate system and paired point-based patient-to-image registration is performed. In the surgical navigation step, the surgical plan is reproduced by quantitatively visualizing the pre-planned insertion position and angle of the pedicle screw using a virtual guide coordinate system. We conducted phantom experiment to verify the error between the surgical plan and the surgical navigation, the experimental result showed that target registration error was average 1.47 ± 0.64 mm when using the proposed method. We believe that our method can be used to accurately reproduce a pre-established surgical plan in spinal fusion surgery.

• Journal of Chest Surgery
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• 제19권4호
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• pp.744-749
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• 1986

Even in the hands of the expert endoscopists, an occasional instrumental perforation of the esophagus occurs. But instrumental perforation of the esophagus should not be difficult to diagnose if the possibility is borne in mind. Occasionally patient with esophageal perforations show little reaction at first, but usually they develop systemic manifestation if surgical management is delayed. Early surgical drainage of esophageal perforation is very important & effective therapeutic method. The delayed surgical treatment of esophageal perforation would have increased the morbidity & mortality by allowing mediastinitis & empyema thoracis. We have experienced 6 cases of delayed surgical management of instrumental perforation of esophagus from May 1974 to April 1986 in the department of thoracic and cardiovascular surgery, Yonsei University, college of the medicine. The ages ranged from 4 years to 57 years. The underlying esophageal diseases consisted of esophageal stricture in 3 cases, foreign bodies in the esophagus in 2 cases and esophageal ca. in one case. Most clinical manifestations on admission were high fever, chest discomfort, chest pain, dysphagia and subcutaneous emphysema. Most complications due to esophageal rupture were acute mediastinitis with or without empyema thoracis. Failure to diagnose promptly and failure to promptly institute adequate treatment undoubtedly were largely responsible for this patients death. All 6 patients had been taken delayed surgical drainage more than 24 hours following esophageal perforation. One patient had been in the open drainage state for long time and the another patient has been in the tracheostomy with postintubation vocal cord ulceration. The third patient died due to respiratory failure and sepsis due to fulminant mediastinitis & empyema thoracis. Even if the patients with esophageal perforation have been taken delayed surgical management, the patients should be survived with aggressive & effective surgical drainage with intensive post-operative care.

• Journal of Chest Surgery
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• 제29권2호
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• pp.227-230
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• 1996

Air space disorders are usually considered medical diseases, although some patients with air space disorders can benefit from surgical intervention. Recently we experienced two cases of bullous emphysema. One case is large bilateral apical bullae and the other is infected large bulls of RUL with bullous emphysema. The patient with large bilateral apical bullae underwent simultaneous operation via bilateral thoracotomy and other patient underwent simultaneous bilateral operation via median sternotomy. Postoperatively, the patient with large bilateral apical bullae showed subjective as well as objective improvement and other patient is resulted subjective improvement.

• Journal of Chest Surgery
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• 제21권1호
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• pp.158-163
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• 1988

12 Patients with thoracic aortic aneurysm were operated between May 1985 to Sept. 1987 at the our department, Hanyang University Hospital. We retrospectively evaluated the surgical results and considered diagnosis, surgical approach and perioperative problems of thoracic aortic aneurysm. There are 9 males and 3 females in the patients. The age ranged from 23 to 61 years with the mean age at 40.6 years. The cause of the aneurysm was atherosclerosis in 5, Marfan`s syndrome in 4, syphilis In 1, trauma in 1 and annuloaortic ectasia in 1 case. According to DeBakey`s classification, Type I was 1 case, Type II was 5 cases and Type III was 6 cases. Among 6 patients with ascending aortic aneurysm, Bentall`s operation in 4 cases and ascending aorta reconstruction using to Dacron Tube Graft in 2 cases were performed successfully. 6 cases with descending aortic aneurysm were managed by prosthetic graft replacement. Chylothorax was observed in 1 patient and postoperative hemorrhage necessitating reopening of the chest occurred in 4 of operative survivors. There were 2 hospital deaths; one patient was dead during the operation and one patient was dead during the post-operative course due to low cardiac output syndrome

• 대한두개안면성형외과학회지
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• 제23권3호
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• pp.134-138
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• 2022

The scalp is the thickest skin in the body and protects the intracranial structures. The coverage of a large scalp defect is a difficult surgical procedure, the full details of which must be considered prior to the procedure, such as defect size and depth, and various factors related to the patient's general condition. Although a free flap is the recommended surgical procedure to cover large scalp defects, it is a high-risk operation that is not appropriate for all patients. As such, other surgical options must be explored. We present the case of a patient with an ulcer on the scalp after wide excision and split-thickness skin graft for squamous cell cancer. We successfully performed a reverse temporalis muscle flap for this patient.

• Journal of Trauma and Injury
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• 제36권3호
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• pp.276-280
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• 2023

Fungal thrombophlebitis of the central vein is a rare, life-threatening disease associated with significant morbidity and mortality. It requires immediate central venous catheter removal and intravenous antifungal therapy, combined in some cases with either anticoagulation or aggressive surgical debridement. A 70-year-old male patient injured by a falling object weighing 1,000 kg was transferred to our hospital. A contained rupture of the abdominal aorta with retroperitoneal hematoma was treated with primary aortic repair, and a small bowel perforation with mesenteric laceration was treated with resection and anastomosis. After a computed tomography scan, the patient was diagnosed with thrombophlebitis of the left internal jugular vein and brachiocephalic vein. Despite antifungal treatment, fever and candidemia persisted. Therefore, emergency debridement and thrombectomy were performed. After the operation, the patient was treated with an oral antifungal agent and direct oral anticoagulants. During a 1-year follow-up, no signs of candidemia relapse were observed. There is no optimal timing of surgical treatment for relapsed fungal central thrombophlebitis. Surgical treatment should be considered for early recovery.

• 기본간호학회지
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• 제17권4호
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• pp.498-507
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• 2010

Purpose: The purpose of this study was to evaluate the effects of preoperative PCA (Patient-Controlled Analgesia) education on pain, patient attitude, and patient satisfaction in surgical patients. Methods: The study was a quasi-experimental research design. The participants were 54 patients who were admitted for surgery at I hospital in G city, Korea. Of the 54 patients, 26 were assigned to the experimental group and the rest to the control group. The PCA education was provided in the nurses' station, individually to patients in the experimental group the day before their operation. Multimedia and brochure, and a real PCA model were used. The control group received only verbal education about PCA. Results: The postoperative pain scores were significantly different for lapse of time in the experimental group compare to the control group. Patient attitude toward using pain medicine was significantly more positive in the experimental group than in the control group. The postoperative patient satisfaction with pain management was significantly higher in the experimental group than in the control group. Conclusion: The study findings indicate that preoperative PCA education could be an effective nursing intervention for pain management of surgical patients.

• Journal of Korean Neurosurgical Society
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• 제38권3호
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• pp.184-189
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• 2005

Objective : Hemangioblastomas are highly vascular and benign neoplasm of the central nervous system[CNS]. They can often be found as multiple lesions, as is commonly observed in von Hippel-Lindau[VHL] disease. The aim of this study is to determine the proper management for multiple hemangioblastomas. Methods : Since 1990, 78cases of hemangioblastoma have been encountered. Among these, 9cases were multiple hemangioblastomas that were treated with surgical resection with or without radiosurgery. The medical, radiological, surgical and histological records were reviewed retrospectively and analyzed statistically. Results : Nine patients presented with multiple hemangioblastomas and were diagnosed as VHL disease. The mean follow-up duration was 75.7months [$6.6{\sim}159.2months$] after the first surgical treatment. Three patients were treated with surgical resection alone and six patients were treated by both surgical resection and radiosurgery. Twenty-one surgical procedures [13 surgical resections and 8 radiosurgery] were performed. One patient required ventriculoperitoneal shunt and a posterior fossa decompressive craniectomy because of post-radiation brain swelling. Another patient refused additional treatment for the newly developed lesions after the successful treatment of initial lesions. The other patient who presented with numerous lesions in the whole brain and spine underwent cranio-spinal irradiation. Remaining patients showed good results. Conclusion : The surgical outcomes for the patients with a single lesion of the CNS hemangioblastoma are favorable. However. the treatment of multiple hemangioblastoma is more difficult, and should be treated by surgical resection and radiosurgery with careful consideration.

• Journal of Chest Surgery
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• 제33권5호
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• pp.432-435
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• 2000

We report a case of primary undifferentiated cardiac sarcoma. The tumor originated from the left atrial free wall with multi-organ metastases, e.g., lung, and adrenal gland. The patient gradually grew worse with dyspnea and hemoptysis because of the obstructed left atrial outflow. Surgical resection of the left atrial sarcoma was undertaken to save the patient's life, followed by chemotherapy and brain irradiation as adjuvant therapy. The prognosis of cardiac sarcoma with metastases is very poor. However, in patients with hemodynamic instability, surgical intervention could be a therapeutic modality as palliation.

• Journal of Chest Surgery
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• 제16권3호
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• pp.405-410
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• 1983

Acquired communicated diverticula between the esophagus and respiratory system are infrequent, and they are caused by carcinoma, trauma, infection, and traction. This report reviews the feature of benign esophagobronchial fistula due to midesophageal diverticulum. Patient is twenty year old man with excellent result by surgical intervention . The surgical procedures consist of divertuculectomy and superior segmentectomy of lower lobe of right lung. Clinically and radiologically, the patient is free from substernal distress, regurgitation, esophagorespiratory fistula, and esophageal stricture after surgical treatment.