Anesthesiology Research and Practice

Research Article

Dimensional Variations of Left-Sided Double-Lumen Endobronchial Tubes

Table 3

Calculated cross-sectional areas (CSAs) of investigated left-sided double-lumen endobronchial tubes (DLTs) based on measurements expressed in Table 2.


Parameter	Size (Fr)	Sheridan DLT	Mallinckrodt DLT	Portex DLT	Rüsch DLT	VIVASIGHT DLT	Well Lead DLT

CSA_MIDDLE	35	114.9 (114.3–116.4)	116.9 (116.6–117.1)	105.4 (105.1–109.2; 87%)	107.7 (107.1–109.5)	121.3 (118.5–124.0)	117.5 (111.9–126.7)
	37	114.7 (98.6–121.7; 81%)	132.6 (132.1–132.6)	118.0 (114.9–121.4)	120.7 (118.4–123.6)	138.9 (137.6–139.7)	141.9 (138.3–145.2)
	39	135.9 (133.6–138.3)	152.3 (147.0–158.8)	126.9 (124.5–130.8; 83%)	131.7 (124.1–158.8)	146.3 (145.0–148.2)	152.0 (150.6–154.1)
	41	144.4 (142.1–147.7)	160.1 (158.0–160.4)	140.8 (139.8–143.3; 85%)	147.2 (145.4–149.5)	164.9 (164.3–164.9)	163.8 (162.6–164.4)

CSA_PTC	35	126.7 (123.5–129.3)	121.1 (120.6–121.6)	118.0 (111.1–121.2)	114.3 (112.5–115.7; 86%)	132.2 (127.5–136.0)	130.7 (125.4–132.2)
	37	130.7 (125.6–137.0)	138.1 (136.3–140.4)	131.7 (128.6–131.9)	129.0 (126.6–130.4; 82%)	158.1 (153.6–163.1)	154.0 (151.1–156.5)
	39	147.1 (143.0–149.5)	148.8 (148.3–151.0)	140.8 (137.4–146.6; 85%)	141.5 (133.2–146.9)	165.5 (159.2–173.7)	162.9 (161.4–168.5)
	41	156.5 (154.2–157.8; 87%)	163.5 (163.2–163.8)	158.7 (156.1–163.0)	157.0 (154.3–158.1)	179.7 (174.0–185.8)	178.2 (171.9–182.3)

CSA_DTC	35	135.8 (133.8–137.4)	122.6 (121.1–124.0)	120.0 (116.6–124.0)	119.5 (119.2–120.8; 84%)	142.7 (138.6–149.4)	129.4 (126.3–136.2)
	37	130.5 (128.2–136.6)	141.2 (139.9–142.5)	128.4 (127.0–130.8; 79%)	128.9 (122.6–133.1)	161.9 (158.7–166.7)	155.7 (152.0–157.2)
	39	148.8 (146.6–150.4)	152.0 (149.8–154.2)	141.2 (138.0–143.6; 87%)	146.6 (141.6–151.5)	162.1 (160.4–169.6)	161.2 (160.0–162.5)
	41	162.2 (158.4–165.0)	164.1 (162.7–164.9)	156.5 (154.3–161.1)	156.1 (154.7–162.1; 88%)	175.6 (173.7–177.6)	177.0 (173.6–178.2)

CSA_PBC	35	74.0 (69.4–76.3)	67.1 (66.8–67.4)	65.8 (63.3–68.0; 85%)	77.4 (75.1–77.6)	72.9 (68.4–78.3)	72.2 (71.3–74.3)
	37	76.3 (73.3–78.9)	84.2 (81.3–86.0)	66.3 (65.5–68.6; 78%)	79.5 (77.5–81.1)	75.0 (72.5–77.6)	85.4 (82.5–86.3)
	39	76.7 (74.1–80.8)	89.8 (86.9–92.8)	73.9 (69.6–77.8; 78%)	94.3 (87.3–98.7)	78.0 (76.2–81.1)	86.6 (79.9–96.6)
	41	86.7 (83.5–93.3)	90.0 (87.2–92.3)	85.3 (83.5–90.5)	101.0 (93.0–105.3)	86.9 (85.6–87.6)	89.8 (84.5–93.4)

CSA_DBC	35	78.3 (74.6–81.0)	72.5 (71.4–73.6)	64.3 (60.9–67.5; 80%)	72.9 (68.6–83.4)	80.7 (75.9–83.9)	73.0 (67.9–76.4)
	37	88.6 (86.4–90.7)	87.3 (86.4–88.3)	67.6 (66.3–68.3; 73%)	88.4 (77.4–93.0)	81.9 (81.1–85.5)	92.3 (87.0–93.3)
	39	81.6 (79.1–82.7; 86%)	94.4 (86.4–95.6)	85.7 (82.2–86.4)	91.7 (86.8–97.3)	89.8 (88.7–90.9)	91.0 (86.0–92.6)
	41	88.6 (86.4–92.3)	95.0 (93.5–97.8)	87.7 (85.5–89.9; 86%)	101.5 (97.4–105.8)	90.2 (86.7–92.1)	96.3 (94.2–98.0)

CSA_MIDDLE = cross-sectional area in the middle (B) between the beginning of the DLT shaft (A) and the proximal edge of the tracheal cuff (C); CSA_PTC = cross-sectional area at the proximal edge of the tracheal cuff (C); CSA_DTC = cross-sectional area at the distal edge of the tracheal cuff (D); CSA_PBC = cross-sectional area at the proximal edge of the bronchial cuff (E); CSA_DBC = cross-sectional area at the distal edge of the bronchial cuff (F) (see also Figure 1). DLT sizes are in French (= 1/3 mm). Data are displayed as median (minimum-maximum) given as millimeter [2]. The largest CSA of a respective DLT size is shaded in gray (100%), and the smallest diameter marked is with an asterisk () (proportion of largest OD).