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Bioavailability as a function of average molecular weight.
| Heparin | Avrg MW (kD) | aXa (U) | aIIa (U) | Availability (%) | Approx. half life (h) | CV (%) of Response |
|---|---|---|---|---|---|---|
| UFH | 13 | 9,000 | 9,000 | 100 | 0.5–1.5 | 31 |
| MMW | 10.5 | 9,000 | 8,100 | 140 | 2.5 | 17 |
| LMWH | 6.2 | 9,000 | 6,300 | 190 | 3.5 | 14 |
| ELMW | 4.5 | 9,000 | 4,500 | 340 | 4.5 | 17 |
