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Flow Analysis of Vacuum Oral Cleaner Developed for Serious Patient

중증환자를 위한 진공 구강 세정기에 대한 유동해석

  • Shin, Hyeon seok (Mechanical Design Team, Soonhan Engineering) ;
  • Kim, Nam Woong (School of Mechanical Engineering, Dongyang Mirae University) ;
  • Kim, Kug Weon (Department of Mechanical Engineering, SoonChunHyang University)
  • 신현석 (순환엔지니어링) ;
  • 김남웅 (동양미래대학교 기계공학부) ;
  • 김국원 (순천향대학교 기계공학과)
  • Received : 2017.10.12
  • Accepted : 2018.01.05
  • Published : 2018.01.31

Abstract

The oral hygiene of patients admitted to the ICU (Intensive Care Unit) is very important. Critically ill patients are basically immunocompromised ones because of the high risk of infection by various pathogenic bacteria. The mouth is not only the primary site of infection, but also the site of systemic infections. The purpose of this study was to design a mouthpiece type vacuum oral cleaner for the oral care of seriously ill patients. A 3D CAD modeling and flow analysis model were established for a double structure type cleaner and standard tooth model, and their pressure and flow characteristics were analyzed. The pressure inside the oral cleaner was almost constant, but the velocity distribution showed a large difference between the inside and outside of the teeth. The velocity at the center region inside of the teeth was the highest, and the speed decreased as the distance from the center increased. In the analysis of the case where the suction tube was replaced by the drainage tube, the velocity at the center of the outer portion of the teeth was the highest. In order to increase the effectiveness of the oral cleaner, alternating between suction and drainage is proposed, and a design complement to increase the speed of the molar region is required.

중환자실에 입원한 환자들의 구강위생은 매우 중요한 문제이다. 중환자들은 기본적으로 면역이 저하된 환자들로 각종 병원성 세균들에 의한 감염의 기회가 높기 때문이다. 구강문제는 감염의 1차 방어선인 구강이 감염의 우선적인 부위로 작용될 뿐 아니라 전신감염을 초래하기도 한다. 본 연구에서는 중증환자의 구강청소를 용이하게 하는 마우스 피스 형태의 새로운 진공 구강 세정기 설계에 관한 연구를 수행하였다. 이중 구조 방식의 세정기와 표준 치아 모델로써 3D CAD 모델링 및 유동해석 모델을 수립하고 압력 및 유동특성을 분석하였다. 세정기 내부의 압력은 거의 일정한 분포를 보였으나, 속력분포의 경우 치아 안쪽과 바깥쪽에서 큰 차이를 보였다. 치아 안쪽에서도 가운데 부분의 속도가 가장 높고 가운데에서 멀어질수록 속력이 감소하는 특성을 보였다. 세정기의 흡입관과 배출관을 바꾸어 해석한 결과 치아 바깥쪽 가운데 부분의 속도가 가장 높게 나타났다. 세정기의 효과를 높이기 위해서 흡입-배출을 교대로 바꾸는 교번식을 제안하고, 어금니 부위의 속력을 높이는 설계 보완이 요구된다.

Keywords

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