Mehanska trombektomija je učinkovita metoda za zdravljenje akutne ishemične možganske kapi, vključno z direktno aspiracijo, odvzemom stenta ali kombinacijo obojega. Neposredna aspiracija se lahko izvede z uporabo različnih katetrov različnih velikosti, odvisno od premera zamašene žile.
Some scholars have divided the angiographic results into three types: "complete recanalization", "partial recanalization" (in the case of thrombus migration downstream of the branch or distal thrombus in the area supplied by the recanalized arterial segment) and "no recanalization". At the same time, the arterial diameter was measured independently before surgery, and the inner diameter of the distal end of the aspiration catheter (DAC) was collected. The inner diameter of the catheter was divided by the arterial diameter (AD) . Through testing and research, it was found that the ratio of the inner diameter of the catheter to the inner diameter of the artery was significantly different between the three recanalization categories, among which the "complete recanalization group" had the highest ratio and the "no recanalization" group had the lowest ratio. Therefore, it was confirmed that the larger diameter of the aspiration catheter relative to the arterial diameter was associated with an increase in the success of recanalization. At the same time, it was reported that larger aspiration catheters had better recanalization effects than smaller catheters, especially catheters with a diameter of >{{0}}.040 palcev v MCA in 0,064 palcev v ICA. Razmerje med velikostjo katetra in stopnjo uspešnosti rekanalizacije je morda zato, ker ima kateter z večjim premerom večjo sesalno silo, ko aspiracijski kateter zajame tromb, s čimer se zmanjša možnost, da se tromb ne bi aspiriral in ušel.
Ker se premeri bolnikovih krvnih žil in katetrov ne razlikujejo veliko, je to v praksi težko doseči, zato so potrebne različne velikosti aspiracijskih katetrov. Sledijo različne možnosti, ki so jih podali učenjaki. Optimalni premer distalnega aspiracijskega katetra se izračuna glede na razmerje med notranjim premerom {{0}}.7–0.8 in zunanjim premerom 0.8–1.0 , prikazani rezultati pa so za različne premere krvnih žil.
Če povzamemo, je razmerje med notranjim premerom aspiracijskega katetra in arterijskim premerom, izmerjenim z angiografijo v območju 0.7-0,8 najbolj povezano s popolno rekanalizacijo. Kirurg lahko pod vodstvom izbere ustreznejši aspiracijski kateter, da izboljša stopnjo uspešnosti rekanalizacije.