Table 1

Aspiration flow of water through various access catheters depending on whether the microcatheter was kept in the access catheter (regular technique) or not (BWT technique)

Access catheterMicrocatheterStent-retrieverFlow with BWT (mL/s)Flow with regular technique (mL/s)Relative flow (%)p Value
Cook Flexor 8 FRebar 18Trevo proVue 4×206.626.3395.58<0.001*
Cook Flexor 8 FRebar 27Trevo proVue 4×206.626.2995.05<0.001*
FlowGate 8 FRebar 18Trevo proVue 4×205.894.0083.76<0.001*
FlowGate 8 FRebar 27Trevo proVue 4×205.063.8380.20<0.001*
Guider Softip 8 FRebar 18Trevo proVue 4×204.804.1786.86<0.001*
Guider Softip 6 FRebar 18Trevo proVue 4×203.001.6755.71<0.001*
Envoy 7 FRebar 18Trevo proVue 4×204.303.4179.19<0.001*
Envoy 6 FRebar 18Trevo proVue 4×203.582.4468.2<0.001*
Navien 5 FRebar 18Trevo proVue 4×202.070.7335.05<0.001*
Sofia 5 FRebar 18Trevo proVue 4×201.820.4926.84<0.001*
  • Water with a temperature of 20°C was aspirated with a constant negative pressure of 25.5 in Hg. Values for blood are approximately 3–4 times lower due to its higher viscosity.

  • Relative flow: flow with microcatheter (regular technique)/flow with pusher-wire (BWT, bare wire thrombectomy technique).

  • *significant values.