尽管至少有7家制造商生产左侧双腔管(DLT),很少有报告比较这些DLT的部分。在这项研究中,我们进一步比较了左侧DLT的各个部分。
我们检查了五家制造商的左侧DLT:Mallinckrodt,Portex,Rüsch,Sheridan,还有Daiken-medical.我们进行了以下六个试验或测量,和三个补充试验或测量:首先,我们试图通过各种尺寸的钢球,每个管腔从最小(3毫米)到最大(4.5毫米)。如果球在第一次尝试中通过,我们只试过一次否则,我们做了第二次尝试。第二,我们使用轮廓投影仪测量了气管和支气管袖带的外径。第三,我们使用轮廓投影仪测量了导管的袖带和支气管段的尖端的长度。第四,我们测量了管子的各种长度。第五,我们测量了管腔和小管的外径,以进行气管和支气管袖带充气。最后,我们测量了各种横截面积,包括气管腔,支气管腔,和袖带充气的小管。我们还进行了三项补充研究。首先,当囊内压力等于2或3kPa时,我们测量了袖带中的空气量。第二,我们定义了气管和支气管袖带的配置。第三,我们定义了斜面的存在或不存在,并使用轮廓投影仪测量了斜面的角度。
我们进行了九次试验和测量,发现每个制造商的管子之间存在很大差异。
五个制造商的管的测量之间发现的巨大差异可能是由于不同的批次或每个制造商的规格变化。我们发现管子质量较低,如变形,以及非通用和不一致的大小,在制造商\'管的比较中。从业者应该意识到这些管的特征和方面。
Although there are at least seven manufacturers producing left-sided double-lumen tubes (DLTs), there have been few reports comparing the segments of these DLTs. In this study, we compared various segments of left-sided DLTs further.
We examined five manufacturers\' left-sided DLTs: Mallinckrodt, Portex, Rüsch, Sheridan, and Daiken-medical. We conducted the following six trials or measurements, and three supplemental trials or measurements: First, we tried to pass various sizes of steel balls down each lumen in order from the smallest (3 mm) to largest (4.5 mm). If the ball passed on the first attempt, we tried just once; otherwise, we made a second attempt. Second, we measured the external diameter of tracheal and bronchial cuff using a profile projector. Third, we measured the length of the cuff and tip of the bronchial segment of the tubes using the profile projector. Fourth, we measured various lengths of the tubes. Fifth, we measured the external diameter of both lumens and the tubules for tracheal and bronchial cuff inflation. Finally, we measured various cross-sectional areas including the tracheal lumen, bronchial lumen, and tubules for cuff inflation. We also conducted three supplemental studies. First, we measured air volume in the cuff when intracuff pressure equaled 2 or 3 kPa. Second, we defined the configuration of the tracheal and bronchial cuffs. Third, we defined the presence or absence of bevels and also measured the angle of the bevels using the profile projector.
We performed nine trials and measurements and found large disparities between each manufacturer\'s tubes.
The large disparities found between the measurements of the five manufacturers\' tubes may be due to different lots or changes in specifications made by each manufacturer. We found tubes exhibiting lower quality, such as deformations, and non-universal and inconsistent sizing, in the comparison of the manufacturers\' tubes. Practitioners should be aware of the features and aspects of these tubes.