Insufficient Humidification of Respiratory Gases in Patients Who Are Undergoing Therapeutic Hypothermia at a Paediatric and Adult Intensive Care Unit
For cooled newborn infants, humidifier settings for normothermic condition provide excessive gas humidity because absolute humidity at saturation is temperature-dependent. To assess humidification of respiratory gases in patients who underwent moderate therapeutic hypothermia at a paediatric/adult i...
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| Format: | Article |
| Language: | English |
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Wiley
2017-01-01
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| Series: | Canadian Respiratory Journal |
| Online Access: | http://dx.doi.org/10.1155/2017/8349874 |
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| author | Yukari Tanaka Sachiko Iwata Masahiro Kinoshita Kennosuke Tsuda Shoichiro Tanaka Naoko Hara Ryota Shindou Eimei Harada Ryouji Kijima Osamu Yamaga Hitoe Ohkuma Kazuo Ushijima Teruo Sakamoto Yushiro Yamashita Osuke Iwata |
| author_facet | Yukari Tanaka Sachiko Iwata Masahiro Kinoshita Kennosuke Tsuda Shoichiro Tanaka Naoko Hara Ryota Shindou Eimei Harada Ryouji Kijima Osamu Yamaga Hitoe Ohkuma Kazuo Ushijima Teruo Sakamoto Yushiro Yamashita Osuke Iwata |
| author_sort | Yukari Tanaka |
| collection | DOAJ |
| description | For cooled newborn infants, humidifier settings for normothermic condition provide excessive gas humidity because absolute humidity at saturation is temperature-dependent. To assess humidification of respiratory gases in patients who underwent moderate therapeutic hypothermia at a paediatric/adult intensive care unit, 6 patients were studied over 9 times. Three humidifier settings, 37-default (chamber-outlet, 37°C; Y-piece, 40°C), 33.5-theoretical (chamber-outlet, 33.5°C; Y-piece, 36.5°C), and 33.5-adjusted (optimised setting to achieve saturated vapour at 33.5°C using feedback from a thermohygrometer), were tested. Y-piece gas temperature/humidity and the incidence of high (>40.6 mg/L) and low (<32.9 mg/L) humidity relative to the target level (36.6 mg/L) were assessed. Y-piece gas humidity was 32.0 (26.8–37.3), 22.7 (16.9–28.6), and 36.9 (35.5–38.3) mg/L {mean (95% confidence interval)} for 37-default setting, 33.5-theoretical setting, and 33.5-adjusted setting, respectively. High humidity was observed in 1 patient with 37-default setting, whereas low humidity was seen in 5 patients with 37-default setting and 8 patients with 33.5-theoretical setting. With 33.5-adjusted setting, inadequate Y-piece humidity was not observed. Potential risks of the default humidifier setting for insufficient respiratory gas humidification were highlighted in patients cooled at a paediatric/adult intensive care unit. Y-piece gas conditions can be controlled to the theoretically optimal level by adjusting the setting guided by Y-piece gas temperature/humidity. |
| format | Article |
| id | doaj-art-373fd40af2e14e9c8c76369b6e2db682 |
| institution | Kabale University |
| issn | 1198-2241 1916-7245 |
| language | English |
| publishDate | 2017-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Canadian Respiratory Journal |
| spelling | doaj-art-373fd40af2e14e9c8c76369b6e2db6822025-02-03T01:06:13ZengWileyCanadian Respiratory Journal1198-22411916-72452017-01-01201710.1155/2017/83498748349874Insufficient Humidification of Respiratory Gases in Patients Who Are Undergoing Therapeutic Hypothermia at a Paediatric and Adult Intensive Care UnitYukari Tanaka0Sachiko Iwata1Masahiro Kinoshita2Kennosuke Tsuda3Shoichiro Tanaka4Naoko Hara5Ryota Shindou6Eimei Harada7Ryouji Kijima8Osamu Yamaga9Hitoe Ohkuma10Kazuo Ushijima11Teruo Sakamoto12Yushiro Yamashita13Osuke Iwata14Department of Paediatrics and Child Health, Kurume University School of Medicine, Fukuoka, JapanDepartment of Paediatrics and Child Health, Kurume University School of Medicine, Fukuoka, JapanDepartment of Paediatrics and Child Health, Kurume University School of Medicine, Fukuoka, JapanDepartment of Paediatrics and Child Health, Kurume University School of Medicine, Fukuoka, JapanDepartment of Paediatrics and Child Health, Kurume University School of Medicine, Fukuoka, JapanDepartment of Paediatrics and Child Health, Kurume University School of Medicine, Fukuoka, JapanDepartment of Paediatrics and Child Health, Kurume University School of Medicine, Fukuoka, JapanDepartment of Paediatrics and Child Health, Kurume University School of Medicine, Fukuoka, JapanDepartment of Clinical Engineering, Kurume University Hospital, Fukuoka, JapanDepartment of Clinical Engineering, Kurume University Hospital, Fukuoka, JapanDepartment of Clinical Engineering, Kurume University Hospital, Fukuoka, JapanDepartment of Anaesthesiology, Kurume University School of Medicine, Fukuoka, JapanAdvanced Emergency Medical Service Centre, Kurume University Hospital, Fukuoka, JapanDepartment of Paediatrics and Child Health, Kurume University School of Medicine, Fukuoka, JapanDepartment of Paediatrics and Child Health, Kurume University School of Medicine, Fukuoka, JapanFor cooled newborn infants, humidifier settings for normothermic condition provide excessive gas humidity because absolute humidity at saturation is temperature-dependent. To assess humidification of respiratory gases in patients who underwent moderate therapeutic hypothermia at a paediatric/adult intensive care unit, 6 patients were studied over 9 times. Three humidifier settings, 37-default (chamber-outlet, 37°C; Y-piece, 40°C), 33.5-theoretical (chamber-outlet, 33.5°C; Y-piece, 36.5°C), and 33.5-adjusted (optimised setting to achieve saturated vapour at 33.5°C using feedback from a thermohygrometer), were tested. Y-piece gas temperature/humidity and the incidence of high (>40.6 mg/L) and low (<32.9 mg/L) humidity relative to the target level (36.6 mg/L) were assessed. Y-piece gas humidity was 32.0 (26.8–37.3), 22.7 (16.9–28.6), and 36.9 (35.5–38.3) mg/L {mean (95% confidence interval)} for 37-default setting, 33.5-theoretical setting, and 33.5-adjusted setting, respectively. High humidity was observed in 1 patient with 37-default setting, whereas low humidity was seen in 5 patients with 37-default setting and 8 patients with 33.5-theoretical setting. With 33.5-adjusted setting, inadequate Y-piece humidity was not observed. Potential risks of the default humidifier setting for insufficient respiratory gas humidification were highlighted in patients cooled at a paediatric/adult intensive care unit. Y-piece gas conditions can be controlled to the theoretically optimal level by adjusting the setting guided by Y-piece gas temperature/humidity.http://dx.doi.org/10.1155/2017/8349874 |
| spellingShingle | Yukari Tanaka Sachiko Iwata Masahiro Kinoshita Kennosuke Tsuda Shoichiro Tanaka Naoko Hara Ryota Shindou Eimei Harada Ryouji Kijima Osamu Yamaga Hitoe Ohkuma Kazuo Ushijima Teruo Sakamoto Yushiro Yamashita Osuke Iwata Insufficient Humidification of Respiratory Gases in Patients Who Are Undergoing Therapeutic Hypothermia at a Paediatric and Adult Intensive Care Unit Canadian Respiratory Journal |
| title | Insufficient Humidification of Respiratory Gases in Patients Who Are Undergoing Therapeutic Hypothermia at a Paediatric and Adult Intensive Care Unit |
| title_full | Insufficient Humidification of Respiratory Gases in Patients Who Are Undergoing Therapeutic Hypothermia at a Paediatric and Adult Intensive Care Unit |
| title_fullStr | Insufficient Humidification of Respiratory Gases in Patients Who Are Undergoing Therapeutic Hypothermia at a Paediatric and Adult Intensive Care Unit |
| title_full_unstemmed | Insufficient Humidification of Respiratory Gases in Patients Who Are Undergoing Therapeutic Hypothermia at a Paediatric and Adult Intensive Care Unit |
| title_short | Insufficient Humidification of Respiratory Gases in Patients Who Are Undergoing Therapeutic Hypothermia at a Paediatric and Adult Intensive Care Unit |
| title_sort | insufficient humidification of respiratory gases in patients who are undergoing therapeutic hypothermia at a paediatric and adult intensive care unit |
| url | http://dx.doi.org/10.1155/2017/8349874 |
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