Patent ID: 11963818
Assignee: UNIVERSITA' DEGLI STUDI DI ROMA LA SAPIENZA
Field: Medical technology (Instruments)
Classification: CPC A  G | IPC A  G

Claim 0:
1. A method for a measurement of haemodynamic indices, comprising:
acquiring at least one ultrasound image of at least one segment of an arterial vessel;
identifying in the at least one ultrasound image at least one sample volume of the at least one segment of the arterial vessel;
obtaining a time series indicating a blood velocity, or velocity signal, in said at least one sample volume and in at least one cardiac cycle, characterized in that it comprises the following steps:
calculating, by means of a processor, a first area (Apre) equal to an area subtended by the velocity signal between a sample relating to an instant of systole start of said at least one cardiac cycle and a sample relating to an instant of systolic peak;
calculating, by means of a processor, a second area (Apost) subtended by the velocity signal between the sample relating to the instant of systolic peak of said at least one cardiac cycle and a sample relating to an instant of diastole end; and
calculating a current peripheral resistance index (CPRI) relationship between the second area (Apost) and the first area (Apre) according to the following formula:, C
   ⁢
   P
   ⁢
   R
   ⁢
   I
  
  =
  
   
    A
    post
   
   
    A
    
     p
     ⁢
     r
     ⁢
     e
    
   
  
 

wherein the at least one sample volume is at least one of inside a region of interest and downstream the region of interest; and
wherein the region of interest comprises at least one of a stent and a section involved in a surgical bypass revascularization.