We have started a project of monitoring vascular access follow-up by ultrasound-dilution technique (Krivitski) in 507 HD patients, 298 (59%) males with a mean age 64,20▒14,04 years, from 13 Spanish HD units .
1) type of VA: autologous in 79,4% and PTFE graft in 20,6%. The autologous have been divided in radiocephalic and elbow
2) Systolic and diastolic arterial blood pressure
3) Venous pressure (VP)
4) Recirculation (R1)
5) Pump blood flow (Qb)
6) Blood flow by Transonic (Qt)
7) Access Flow
8) Needle size and
10) Cardiac Output.
Moreover, we compared the measurement with needles in direction to the flow (21,6%) or against the flow (78,4%).
xVP R-C 132,11▒33,61 vs x VP elbow 144,33▒30,29 (p=0,009).
x Access Flow radiocephalic 814,82▒493,37 vs x Elbow Access flow 1129▒495,7 (p=0,003).
Overall summary considering all vascular access in first and second measurements .
2) There is a significant difference between Qb and Qt, being the biggest in autologous VA
3) More proximal (elbow) autologous VA provide a significant higher blood flow
4) Comparing autologous and PTFE grafts VA, we did not see significant differences in the access blood flow, although VP was higher among
5) The monitoring at 3 months did not reveal differences in measurements. Summary,Transonic monitor seems to be useful in autologous and in PTFE vascular accesses.