Fast Stent Retrieval Improves Recanalization Rates of Thrombectomy: Experimental Study on Different Thrombi

INTRODUCTION

There is still 10 to 20% of clots that cannot be removed by mechanical thrombectomy and so far only half of the patients reach a first pass effect.

Manufacturers advise to withdraw slowly the stent-retriever to avoid potential vessel damage and thrombus fragmentation.

However, a fast stent retrieval may mobilize the clot more suddenly and apply a higher withdrawal force to trap the thrombus.

PURPOSE

This study aimed to determine whether the speed of retrieval could influence clot extraction.

METHODS

Experiments were dichotomized into fast and slow retrieval using a wedging technique, in which the stent retriever and distal catheter are retrieved together. Three different clot types were used.

FAST retrieval of a fibrin rich clot with Embotrap

SLOW retrieval of a fibrin rich clot with Solitaire

RBC = Red blood cell rich clot | Fibrin = Firbrin rich clot | Hybrid = Hybrid friable clot

CONCLUSION

In this experimental model, rapid retrieval improved recanalization rates.

This was particularly true in case of fibrin-rich thrombi, which are known to be tough to remove