• 대한응급의학회지
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• 제29권6호
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• pp.641-648
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• 2018

Objective: This study examined the incidence and amount of air inflow during central venous catheter (CVC) insertion. Methods: This study was an experimental study aimed at designing an apparatus to implement blood vessel and blood flow in the human body. A 1.5-m long core tube with a Teflon tube, suction rubber tube, and polyvinyl chloride tube were made. This core tube was assumed to be the blood vessel of the human body. Blood was replaced with a saline solution. The saline solution was placed higher than the core tube and flowed into the inside of the tube by gravity. The CVC was injected 15-cm deep into the core tube. The air was collected through a 3-way valve into the upper tube. The experiments were carried out by differentiating the pressure in the tube, CVC insertion step, and diameter of the end of the catheter. The experiment was repeated 10 times under the same conditions. Results: The amount of air decreased with increasing pressure applied to the tube. Air was not generated when the syringe needle was injected, and the amount of air increased with increasing size of the distal end catheter. Conclusion: To minimize the possibility of air embolism, it is necessary to close the distal end catheter at the earliest point as soon as possible.

• 대한소화기학회지
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• 제72권6호
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• pp.308-312
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• 2018

Percutaneous endoscopic gastrostomy (PEG) is widely used to provide nutritional support for patients with dysphagia and/or disturbed consciousness preventing oral ingestion, and PEG tube placement is a relatively safe and convenient non-surgical procedure performed under local anesthesia. However, the prevention of PEG-insertion-related complications is important. A 64-year-old man with recurrent pneumonia underwent tracheostomy and nasogastric tube placement for nutritional support and opted for PEG tube insertion for long-term nutrition. However, during the insertion procedure, needle puncture had to be attempted twice before successful PEG tube placement was achieved, and a day after the procedure his hemoglobin had fallen and he developed hypotension. Abdominal computed tomography revealed injury to a pancreatic branch of the superior mesenteric artery (SMA) associated with bleeding, hemoperitoneum, and pancreatitis. Transarterial embolization was performed using a microcatheter to treat hemorrhage from the injured branch of the SMA, and the acute pancreatitis was treated using antibiotics and supportive care. The patient was discharged after an uneventful recovery. Clinicians should be mindful of possible pancreatic injury and bleeding after PEG tube insertion. Possible complications, such as visceral injuries or bleeding, should be considered in patients requiring multiple puncture attempts during a PEG procedure.

• Tuberculosis and Respiratory Diseases
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• 제56권6호
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• pp.628-637
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• 2004

연구배경 : 경피폐세침흡인생검술은 비교적 간편하고 안전한 검사이기 때문에 여러 가지 폐병변의 진단에 유용한 검사로 알려져 있으나 때때로 기흉 등의 합병증이 발생할 수 있다. 저자들은 경피폐세침흡인생 검술 후 발생하는 합병증의 빈도 및 합병증 중 제일 많은 부분을 차지하는 기흉의 위험인자를 알아보고자 하였다. 대상 및 방법 : 1988년에서 2002년 사이에 다양한 폐병변의 진단을 목적으로 경희의대부속병원 호흡기내과에서 경피폐세침흡인생검술을 시행 받은 403명을 대상으로 의무기록과 방사선검사결과를 후향적으로 검토하여 자료를 수집하였다. 결 과 : 총 403명의 환자들 중(남자 245명, 여자 158명) 209명이 악성질환으로, 194명이 양성질환으로 나타났으며, 평균연령은 $58.5{\pm}12.7$세였고, 검침의 평균 깊이는 $6.3{\pm}1.7cm$, 193명이 흡연자였다. 합병증으로는 기흉이 48명, 경미한 객혈이 4명으로 총 발생률은 12.9%였다. 48명의 환자 중 35명이 20% 미만의 기흉으로 산소공급만으로 치료를 받았고, 11명이 50% 이상의 심한 기흉으로 흉관삽입을 시행 받았으며 나머지 2명은 주사기 흡인으로 치료받았다. 기흉발생의 위험요인에 대한 다변량분석을 시행한 결과 병변의 크기와 위치, 검침의 위치, 병변의 진단 등은 관계가 없었으나 환자의 나이와 성별(p<0.05), 검침의 깊이(p<0.001)는 기흉의 발생과 밀접한 관계를 보였다. 흡연유무(p<0.005)뿐만 아니라 흡연량(p<0.001) 또한 기흉발생과 의미 있는 관계를 나타냈으며 각각 4.0%에서 23.1%까지 다양한 발생률을 보인 검사자도 기흉발생의 의미 있는 독립적 위험인자로 나타났다. 한편 산소공급만으로 치료받은 35명의 검침의 평균깊이는 $6.7{\pm}1.6cm$인데 비해 나머지 13명의 심한 기흉환자는 $8.2{\pm}1.2cm$로 검침의 깊이가 깊을수록 심한 기흉이 발생함을 알 수 있었다. 결 론 : 경피폐세침흡인생검은 합병증이 적은 비교적 안전한 검사이며 검사 후 발생하는 가장 흔한 합병증인 기흉의 독립적인 위험인자로는 환자의 나이와 성별, 검침의 깊이, 검사자, 흡연유무 및 흡연량 등이다.

• Fibers and Polymers
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• 제4권2호
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• pp.71-76
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• 2003

We evaluated the seam characteristics with finishing, seaming and sealing processes and seam Puckering behavior of the breathable waterproof fabrics with laser scan. There were differences in 99% significant level between the seamed fabric and the sealed fabric. Seam breakage was initiated with the breakage of sewing thread, so the seam strength after seaming was almost uniform. The sewn seam strength and elongation increased with sealing process in all finishing methods. Pucker grade of laminating type was generally much higher than that of the coating type. We confirmed that wave length and amplitude have more important meaning than the number of weave in the breathable waterproof fabrics. The puckering in breathable waterproof fabrics is mainly occurred by inherent and feeding pucker. The former if due to the insertion of sewing thread and the littler is caused by differential feeding when two pieces of fabric are fed into the gap between a press foot and needle plate.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2004년도 추계학술대회 논문집
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• pp.804-808
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• 2004

This paper deals with the designing of instrument for achieving surgical operation in the stomach and gullet using endoscope channel. The method used herein was to provide beads to knot suturing thread automatically. Following design rules were applied : 1) that instrument must be designed to enable surgical operator to stitch successively by only simple handling 2) that instrument must be designed to minimize insertion and extraction of endoscope. The main result from the experiment with animal stomach was that the surgical operation time was reduced and successive suture was available. Considering the requirement of operator‘s highly trained skills and the discomfort of patient in traditional suture process, the proposed design is expected to markedly improve the endoscopic suturing performance.

• The Korean Journal of Pain
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• 제12권2호
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• pp.258-262
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• 1999

Sacral meningeal cyst is usually asymtomatic, but may be responsible for sciatic pain syndromes and other clinical symptoms. Sacral meningeal cyst might be suspected when definite explanation for the clinical symptom, such as herniation of the intervertebral disc or spinal stenosis is not found. Plain films and CT may suggest the presence of sacral meningeal cyst, but MR is the current imaging study of choice. Evaluation of the correlation between the symptom and the cyst is as important as detection of it. We have experienced a case of sacral meningeal cyst detected during caudal epidural block. The patient complained of low back pain radiating to thigh. Plain films and lumbar spine CT showed no remarkable finding except disc bulging. During caudal epidural needle insertion, there was leakage of clear CSF, and intrasacral cystic shadow was visualized by dye injection. MR confirmed sacral meningeal cyst.

• 한국임상수의학회지
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• 제16권2호
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• pp.413-416
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• 1999

To establish feline electroacupuncture anesthesia, 5 cats (mixed, 1 month old, 0.4~0.5 kg, female) were examined in the present study. The acupoints used for feline electroacupuncture anesthesia were Tian-ping and Bai-hui. After perpendicular insertion of needle to Tian-ping and Bai-hui, respectively, positive electrode was connected at Tian-ping and negative electrode was connected at Bai-hui, respectively, Electric condition was 3 V and 30 Hz. To examine the effect of electroacupuncture anesthesia, laparotomy (5 heads)was applied. The pain of the body surface and the extremities excluding the tail was not found, and the induction time of electroacupuncture anesthesia was approximately 1 minute. As for the reactions with electroacupuncture anesthesia, the head part was directed to backward, blepharoreaction was mild and the consciousness was vivid. The class of anesthesia effect was excellent in 4 heads and was poor in 1 head. The pain was not observed and bleeding was comparatively small volume during surgery in excellent group.

• Investigative Magnetic Resonance Imaging
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• 제23권2호
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• pp.142-147
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• 2019

Piriformis syndrome caused by an accessory belly of the piriformis muscle is very rare. Only a few cases have been reported. Here, we report a case of piriformis syndrome resulting from an extremely rare type of accessory belly of the piriformis muscle originated at the proximal third portion of the main piriformis muscle and attached separately to the greater trochanter inferior to the insertion of the main piriformis muscle. A definitive diagnosis of piriformis syndrome was made based on magnetic resonance imaging and magnetic resonance neurography findings that were consistent with results of nerve conduction study and needle electromyography.

• Clinical and Experimental Reproductive Medicine
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• 제48권1호
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• pp.91-94
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• 2021

A 28-year-old woman presented with a 1-year history of severe progressive dysmenorrhea following suction evacuation and tubal ligation. Sonography showed a bicornuate uterus with hematometra in the left horn. Hysteroscopy ruled out a diagnosis of a congenital Müllerian anomaly, as both ostia appeared normal. Under laparoscopy, a mass was seen on the left fundal region near the insertion of the round ligament, and needle aspiration of a chocolate-colored fluid confirmed the diagnosis of an adenomyotic cyst. The cyst was excised. The patient recovered well and has been symptom-free since surgery. Adenomyotic cyst is a rare entity in young women and must be differentiated from obstructive Müllerian anomaly. Laparoscopy is the preferred minimally invasive modality for managing this rare disorder.

• Journal of Medicine and Life Science
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• 제19권2호
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• pp.70-73
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• 2022

Here, we report a case of ultrasound-assisted subarachnoid block in a patient with severe kyphosis. A 69-year-old man was scheduled for metal removal from hip screws. He had a previous experience with subarachnoid block using the landmark-guided technique, but it was very difficult due to severe kyphosis. However, we could easily determine the correct needle insertion point using ultrasound imaging and performed a successful dural puncture on the first attempt. This case demonstrates the clinical usefulness of ultrasound imaging for subarachnoid blocks in patients with severe kyphosis.