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Rapid Establishment of Tracheal Stenosis in Pigs Using Endotracheal Tube Cuff Overpressure and Electrocautery

Current Medical Science 2021年第2期41卷 329-335页

作者： Jin Hyoung Kim Jong Joon Ahn Yangin Jegal soohyun bae Soon Eun Park Moon Sik Jung Ju Ik Park Hee Jeong Cha Yongjik Lee Taehoon Lee Division of Respiratory and Critical Care Medicine Department of Intemnal MedicineUlsan University HospitalUniversity of Ulsan College of MedicineUlsan 44033Korea Department of Anesthesiology and Pain Medicine UIsan University HospitalUniversity of Ulsan College of MedicineUlsan 44033Korea Department of Pathology Ulsan University HospitalUniversity of Ulsan College of MedicineUlsan 44033Korea Department of Thoracic and Cardiovascular Surgery Ulsan University HospitalUniversity of Ulsan College of MedicineUlsan 44033Korea

To apply a new airway treatment to humans, preclinical studies in an appropriate animalmodel is needed. Canine, porcine and leporine tracheas have been employed as animal airwaystenosis models using various methods such as chemical caustic agents, laser, and ***, existing models take a long time to develop (3- 8 weeks) and the mechanism of stenosisis different from that in humans. The aim of the present study was to establish a new and fasttracheal stenosis model in pigs using a combination of cuff overpressure intubation (COI) andelectrocautery. Fourteen pigs were divided into three groups: tracheal cautery (TC) group (n=3),COI group (n=3), and COI-TC combination group (n=8). Cuff overpressure (200/400/500 mmHg)was applied using a 9-mm endotracheal tube. Tracheal cautery (40/60 watts) was performed usinga rigid bronchoscopic electrocoagulator. After intervention, the pigs were observed for 3 weeks andbronchoscopy was performed every 7 days. When the cross-sectional area decreased by > 50%, itwas confirmed that tracheal stenosis was established. The time for tracheal stenosis was 14 days inthe TC group and 7 days in the COI-TC combination group. In the COI group, no stenosis *** the COI-TC group, electrocautery (40 watts) immediately after intubation for>1 h with a cufpressure of 200 mmHg or more resulted in suficient tracheal stenosis within 7 days. Moreover, thedegree of tracheal stenosis increased in proportion to the cuff pressure and tracheal intubation *** combined use of cuf overpressure and electrocautery helped to establish tracheal stenosis inpigs rapidly.

关键词： pig tracheal stenosis model cuff overpressure electrocautery

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