두 종류의 열수분교환기를 사용시 흡입가스의 습도의 변화와 일회 호흡량에 미치는 영향 (The effect of two types of humidifying devices on humidity of inspired gas and tidal volume by ventilator monitoring)

서지정보

· 발행기관 : 대한마취통증의학회
· 수록지 정보 : Anesthesia and Pain Medicine / 4권 / 4호 / 360 ~ 363페이지
· 저자명 : 전승규, 홍기혁, 김민수, 임윤희, 유병훈, 연준흠, 우승훈

초록

Background: In general anesthesia, a heat and moisture
exchanger (HME) is used to prevent hypothermia and to maintain
humidity of inspired gas. We hypothesized that after using a HME
expiratory tidal volume decreases because a HME traps the expired
vapor. The aim of this study was to evaluate the humidity of
expired gas and to investigate the accuracy of tidal volume
monitoring.
Methods: Forty patients undergoing elective surgery under general
anesthesia were randomly allocated into two groups. Group P (n
= 20) used Pall Breathing filter (pall BB25, ACE medical, Korea)
and Group H (n = 20) used Hygrobac S (Mallinckrodt Dar, Mirandola,
Italy) between endotracheal tube and Y-piece. And with same kind
of ventilator, we measured expiratory tidal volume, temperature and
relative humidity at before and after HEM. And we recorded
expiratory tidal volume monitored by ventilator with and without
HME.
Results: The relative humidity was significantly higher at before
using HEM than after using HEM in both group. The temperature
in Group H was higher when measured at before HME but not in
Group P. The measured expiratory tidal volume at before and after
HEM was not significantly different. The tidal volume monitored
by ventilator with HEM was significantly smaller than without HEM,
by 3.1% in Group P and 5.3% in Group H.
Conclusions: The HMEs improve inspiratory humidity and
temperature of anesthetic gas. But monitored expiratory tidal volume
was underestimated when using HMEs.

영어초록

Background: In general anesthesia, a heat and moisture
exchanger (HME) is used to prevent hypothermia and to maintain
humidity of inspired gas. We hypothesized that after using a HME
expiratory tidal volume decreases because a HME traps the expired
vapor. The aim of this study was to evaluate the humidity of
expired gas and to investigate the accuracy of tidal volume
monitoring.
Methods: Forty patients undergoing elective surgery under general
anesthesia were randomly allocated into two groups. Group P (n
= 20) used Pall Breathing filter (pall BB25, ACE medical, Korea)
and Group H (n = 20) used Hygrobac S (Mallinckrodt Dar, Mirandola,
Italy) between endotracheal tube and Y-piece. And with same kind
of ventilator, we measured expiratory tidal volume, temperature and
relative humidity at before and after HEM. And we recorded
expiratory tidal volume monitored by ventilator with and without
HME.
Results: The relative humidity was significantly higher at before
using HEM than after using HEM in both group. The temperature
in Group H was higher when measured at before HME but not in
Group P. The measured expiratory tidal volume at before and after
HEM was not significantly different. The tidal volume monitored
by ventilator with HEM was significantly smaller than without HEM,
by 3.1% in Group P and 5.3% in Group H.
Conclusions: The HMEs improve inspiratory humidity and
temperature of anesthetic gas. But monitored expiratory tidal volume
was underestimated when using HMEs.

참고자료

· 없음