An apparatus for use in carotid angioplasty, said apparatus comprising: a catheter (224, 324) having a distal end and a proximal end opposite said distal end and unprimer and second occlusive members (225, 252, 325, 352), at least said first occlusive member (252, 352) located on said catheter configured said first and second occlusive members to reverse the direcciónnatural blood flow in the carotid artery internal of a patient when said first member oclusivoocluye the common carotid artery (212, 312) and said second occlusive member (225, 325) occluding the external arteriacarótida (220, 320), wherein said catheter has a first shaft portion that extends proximally from said occluding primermiembro (252, 352), said first shaft portion one máximadimensionada cross section to be inserted into the common carotid artery (212, 312), said first portion having the axis a length of about 2 centimeters to about 25 centimeters so that seaadecuada for transcervical access to the common carotid artery yen said catheter has a port blood inlet (374) located distal to said occluder primermiembro (252, 352) characterized in that: the apparatus further comprises a reservoir of blood collection (598) for connection to dichocatéter (224, 324) for collecting passively the blood from said blood inlet port (374) and eldepósito pickup (598) includes a port blood inlet (592) with a first valve (591) which, when open, allows blood to flow passively into the collection reservoir (598) during reversal of the natural direction of blood flow in the internal carotid artery of a patient, unpuerto blood outlet (593) with a second valve (590) which, when open, allows lasangre flow out of the collection tank, an outlet port air (596) to purge air out deldepósito collection while the blood is collected in the collection reservoir in use, and a plunger (594) parausarlo to expel the blood collected outside the collecting container through the outlet port blood (593) and return to the patients vasculat
