In vitro examination of the pressure effect on clot dissolution with thrombolytic patch.

Bio-kinetic thrombus dissolution model has been developed to describe the thrombus dissolution behavior during endoluminal thrombolytic patch treatment to recanalize blocked vessel in ischemic strokes. The initial model ignored the effect of pulsatile pressure in the lumen. However, pulsatile pressure in the lumen may affect molecule diffusion and bio-chemical reaction rate and accelerate clot dissolution. The effect of pressure on the dissolution rate was examined in this study. The dissolution behaviors of 100-400 μm thick blood clot specimens subject to diastolic, systolic, and pulsatile pressure were characterized using Raman spectroscopy. The results showed that dissolution time was reduced by less than 2 mins and is negligible in comparison with total treatment time. The effect of pressure may be ignored and the developed bio-kinetic model may be used in surgical applications of endoluminal thrombolytic patch to estimate treatment time in ischemic stroke.