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<ins>Improvements in antirestenotic drugs:</ins> Improvements in antirestenotic drugs have been relatively modest compared with the aforementioned improvements in stent platforms and polymers. Experiences with first-generation DES led the interventional cardiology community to conclude that sirolimus and its analogues were superior to paclitaxel for use on a DES. The cytotoxic properties of paclitaxel are probably too aggressive for the purpose of preventing formation of neointima, the more subtle anti-inflammatory and cytostatic effects of sirolimus seem to be better suited for this purpose. Several analogues of sirolimus have been developed, these are chemically altered forms of the drug with improved lipophilicity such as biolimus A9 or zotarolimus. <br /> | <ins>Improvements in antirestenotic drugs:</ins> Improvements in antirestenotic drugs have been relatively modest compared with the aforementioned improvements in stent platforms and polymers. Experiences with first-generation DES led the interventional cardiology community to conclude that sirolimus and its analogues were superior to paclitaxel for use on a DES. The cytotoxic properties of paclitaxel are probably too aggressive for the purpose of preventing formation of neointima, the more subtle anti-inflammatory and cytostatic effects of sirolimus seem to be better suited for this purpose. Several analogues of sirolimus have been developed, these are chemically altered forms of the drug with improved lipophilicity such as biolimus A9 or zotarolimus. <br /> | ||
{| class="wikitable" | |||
|+ Table 1: Differences in stent design between various drug-eluting stents | |||
! | |||
|- | ! DES type | ||
! | ! Drug Eluted | ||
|- | ! Stent Material | ||
| | !Strut thickness | ||
!Polymer | |||
!Polymer thickness | |||
!Polymer type | |||
|- | |||
! Cypher SES | |||
| First-generation | |||
| Sirolimus | |||
| 316L stainless steel | |||
| 140µm | |||
| 3-layer permanent polymer | |||
| 14µm | |||
| Durable | |||
|- | |||
! Row header A | |||
| Cell B | |||
| Cell C | |||
|- | |||
! Row header A | |||
| Cell B | |||
| Cell C | |||
|- | |||
! Row header A | |||
| Cell B | |||
| Cell C | |||
|- | |||
! Row header A | |||
| Cell B | |||
| Cell C | |||
|- | |||
! Row header A | |||
| Cell B | |||
| Cell C | |||
|- | |||
! Row header A | |||
| Cell B | |||
| Cell C | |||
|- | |||
! Row header A | |||
| Cell B | |||
| Cell C | |||
|- | |||
! Row header A | |||
| Cell B | |||
| Cell C | |||
|} | |} | ||