Table 1 |
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|
Baseline condition, valve performance and gravity application time results |
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| Parameters |
No valve |
Perfect valve |
"Real" valve |
Leaky valve |
Gravity test |
|
|
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| Diameter (cm) |
1.2 |
1.2 |
1.2 |
1.2 |
1.2 |
| Length (m) |
1 |
1 |
1 |
1 |
1 |
| Young's modulus (kPa) |
1000 |
1000 |
1000 |
1000 |
1000 |
| Poisson's ratio |
0.5 |
0.5 |
0.5 |
0.5 |
0.5 |
| Blood viscosity (mPas) |
4 |
4 |
4 |
4 |
4 |
| Blood density (Kgm-3) |
1000 |
1000 |
1000 |
1000 |
1000 |
| Gravity application time (s) |
Near instantaneous |
Near instantaneous |
Near instantaneous |
Near instantaneous |
0.1 |
| Valve distribution |
No valve |
One |
One |
One |
One |
| Valve location from inlet (m) |
No valve |
0.5 |
0.5 |
0.5 |
0.5 |
| Valve performance |
No valve |
Perfect |
"Real" |
Leaky |
Perfect |
| First peak (mmHg) |
136.9 (18.2 kPa) |
60.2 (8.01 kPa) |
60.3 (8.02 kPa) |
65.4 (8.69 kPa) |
50.3 (6.69 kPa) |
| Second peak (mmHg) |
127.1 (16.9 kPa) |
81.9 (10.9 kPa) |
81.9 (10.9 kPa) |
115.8 (15.4 kPa) |
72.6 (9.66 kPa) |
| Maximum pressure (mmHg) |
136.9 (18.2 kPa) |
93.3 (12.4 kPa) |
93.9 (12.4 kPa) |
115.8 (15.4 kPa) |
99.3 (13.2 kPa) |
| Dynamic pressure ratio |
1.83 |
1.25 |
1.25 |
1.51 |
1.33 |
| Valve closed time (s) |
No valve |
0.17 |
0.17 |
0.11 |
0.16 |
| Maximum collapse (%) |
0.02 |
20.2 |
20.4 |
3.57 |
8.17 |
| Maximum expansion (%) |
15.1 |
9.89 |
9.89 |
12.5 |
10.6 |
Zervides et al. BioMedical Engineering OnLine 2008 7:8 doi:10.1186/1475-925X-7-8 |
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