Table 3.
Estimated data of x in systemic (A) and pulmonary arteries (B) from reported data sets by previous studies.
| References | Range of rs (mm) | x s | |
|---|---|---|---|
| (A) Systemic arteries | |||
| Proximal | 1 < rs | ||
| Dog | Milnor (1982) | 2–9.5 | 2.32 ± 0.06 |
| Dog SMA | Sherman (1981) | 1.5 | 2.46 |
| Intermediate | 0.1 < rs≤ 1 | ||
| Dog | Milnor (1982) | 0.225–0.65 | 2.49 |
| Dog SMA | Sherman (1981) | 0.3–0.5 | 2.22 ± 0.09 |
| Peripheral | 0.004 ≤ rs≤ 0.1 | ||
| Dog | Milnor (1982) | 0.075 | 2.95 |
| Dog SMA | Sherman (1981) | 0.011–0.016 | 3.10 ± 0.241 |
| References | Range of rp (mm) | x p | |
|---|---|---|---|
| (B) Pulmonary arteries | |||
| Proximal | 0.1 < rp | ||
| Human | Horsfield (1978) | 0.112–0.425 | 2.42 ± 0.33 |
| Human lt. | Huang et al. (1996) | 0.11–7.4 | 2.82 ± 0.50 |
| Human | Singhal et al. (1973) | 0.112–15 | 2.30 ± 0.46 |
| Dog rt. | Gan and Yen (1994) | 0.14–5.56 | 2.72 ± 0.57 |
| Dog | Milnor (1982) | 0.5–8.0 | 2.76 ± 0.52 |
| Cat rt. | Zhuang et al. (1983) | 0.176–2.54 | 2.50 ± 0.51 |
| Rat lt. | Jiang et al. (1994) | 0.13–0.8 | 1.60 ± 0.56 |
| Peripheral | 0.004 ≤ rp ≤ 0.1 | ||
| Human | Horsfield (1978) | 0.0065–0.069 | 2.54 ± 0.11 |
| Human lt. | Huang et al. (1996) | 0.01–0.075 | 2.42 ± 0.31 |
| Human | Singhal et al. (1973) | 0.011–0.069 | 2.33 ± 0.04 |
| Dog rt. | Gan and Yen (1994) | 0.014–0.070 | 2.52 ± 0.19 |
| Cat rt. | Zhuang et al. (1983) | 0.012–0.096 | 2.39 ± 0.23 |
| Rat lt. | Jiang et al. (1994) | 0.00665–0.078 | 2.29 ± 0.83 |
r stands for vessel radius; x, radius exponent, defined by equation (1 or 3; s, systemic; p, pulmonary. SMA indicates superior mesenteric artery; lt, left; rt., right. 1excluded the rank 4 arterial data (Sherman 1981) as an outlier. Vessels are categorized in terms of the radius by the classification presented in Table 1A and 1B. Data of the whole pulmonary arterial tree are indicated with no notation of laterality. The present analysis used table 1 (Gan and Yen 1994), table 6 (Horsfield 1978), table 2 (Huang et al. 1996), table 2 (Jiang et al. 1994), table 2.3 (Milnor 1982), table III (Sherman 1981), table 4 (Singhal et al. 1973), and table 1 (Zhuang et al. 1983). Data are presented as the mean with one standard deviation.