Effectiveness of pH Measurements In Predicting Feeding Tube Placement: An Update
Effectiveness of pH Measurements In Predicting Feeding Tube Placement: An Update
复制标题
pH 测量在预测饲管放置方面的有效性：更新
作者：
N. Metheny;L. Reed;L. Wiersema;M. McSweeney;M. A. Wehrle;Joan Clark
本文报告了一项正在进行的临床研究的进一步结果，该研究旨在评价饲管抽吸物的pH值可用于区分胃和肠管放置与胃和呼吸管放置的程度。样本包括405个来自小口径鼻胃管的抽吸物和389个来自鼻肠管的抽吸物，这些抽吸物来自605名年龄从18岁到94岁的受试者。在初始放置时收集数据，并在可能的情况下在开始喂食后再次收集数据。共794个pH计读数与X射线同时进行，以确定饲管位置。根据pH计读数，成功区分了胃放置和肠放置饲管（p <S.0001）。405个胃液pH计读数中约有85%在0至6.0之间，而389个肠道抽吸物pH计测量值中超过87%大于6.0。使用pH计对无意中置于呼吸道中的饲管中的4份抽吸物（2份在胸膜腔中，2份在气管支气管树中）进行了检测，所有抽吸物的pH值均大于6.5。
This paper reports further findings from an ongoing clinical study designed to evaluate the extent to which pH values of aspirates from feeding tubes can be used to differentiate between gastric and intestinal tube placement and gastric and respiratory tube placement. The sample consisted of 405 aspirates from smallbore nasogastric tubes and 389 aspirates from nasointestinal tubes, which were obtained from 605 subjects ranging in age from 18 to 94 years. Data were collected at the time of initial placement and again, when possible, after feedings were initiated. A total of 794 pH-meter readings were made concurrently with X-rays to determine feeding tube position. Gastric placement was successfully distinguished from intestinal placement of the feeding tubes on the basis of pH-meter readings (p <S.0001). Approximately 85% of the 405 pH-meter readings from gastric fluid were between 0 and 6.0, while over 87% of the 389 pH-meter measurements performed on intestinal aspirates were greater than 6.0. Four aspirates from feeding tubes inadvertently placed in the respiratory tract (two in the pleural space and two in the tracheobronchial tree) were tested with a pH-meter, all had pH values greater than 6.5.