The Effect Of Arterial-Venous Impulse Foot Pump On Popliteal Artery Haemodynamic Parameters In The Elder With PAOD

To investigate the effect of Arterial-Venous impulse foot pump (A-V foot pump)on popliteal artery haemodynamic parameters in old healthy individuals and in old patients with peripheral arterial occlusive disease(PAOD).40 limbs from 62 PAOD patients with superficial femoral artery occlusion or multiple or tandem stenoses(more than 75%in areal stenosis)and 40 limbs from 20 healthy individuals,both of which are over 60 years,were screened from out-patients and in-hospital patients between October 2008 and January 2009.Popliteal artery volume flow[vF1],mean velocity[mV],diameter[D],peak systolic velocity[PSV],end diastolic velocity[EDV]and pulsatility index[PI] were measured in both groups,at pre-treatment,30 minutes after treatment and the moment of stopping treatment(less than 60 seconds)using colour-flow duplex imaging(CFDI).The setted parameters of A-V foot pump includes:applied pressure:120 mmHg;inflation time:3 seconds;deflation time:17 seconds.On application of A-V foot pump,popliteal artery vF1 increased by 94%in the healthy group(p<0.01)and by 67%in the PAOD group(p<0.01). Within 60 seconds of the cessation of pump action,blood flow decreased significantly in both groups(p<0.01),but maintained a significantly higher level than that of baseline(p<0.01,in both groups).The mV,PSV and EDV showed a similar pattern of significant changes.Both in healthy group and in the PAOD group,the PI decreased with A-V foot pump(p<0.01)and increased post-compression;however,it was significantly lower than that of baseline (p<0.01)within 60 seconds of impulse delivery.Compared with that of the PAOD group,the effect of A-V foot pump on Popliteal Artery Haemodynamics in the healthy group is greater(p<0.01).A-V foot pump can significantly augment popliteal arterial inflow on short term both in old healthy individuals and in old PAOD patients.The increase of EDV and decrease of PI indicate that the attenuation of peripheral resistance is one of the main mechanisms in the elderly.The effect of A-V foot pump on Popliteal Artery Haemodynamics in the old healthy group is greater than that in the old PAOD group.