<prompt> The normal ankle brachial pressure index ABPI is 1.0.A value of 0.8 suggestsGood flowSome degree of alterial obstructionImpending gangrenePresence of collaterals  <response>: . The normal value of Ankle Brachial Pressure index ABPI will be less than 0.3.one should check blood pressure in all the 4 limbs.ABPI is checked in supine position;systolic blood pressure in upper and lower limbs is checked and higher value of each extremities is taken;ABPI is calculated.Results-0.9 is normal ;.70-0.89 is mild disease; 0.50-0.69 is moderate; 0.50 is severe. Refer page no 171 of SRBs manual of surgery 5 th edition. 