Devices, systems, and methods and associated display screens for assessment of vessels
Devices, systems, and methods for visually depicting a vessel and evaluating treatment options are disclosed. The methods can include obtaining pressure measurements from first and second instruments positioned within a vessel of a patient while the second instrument is moved longitudinally through the vessel from a first position to a second position and the first instrument remains stationary within the vessel; and outputting a visual representation of the pressure measurements obtained by the first and second instruments on a display, the output visual representation including a graphical display of a pressure ratio of the obtained pressure measurements and at least a portion of a pressure waveform of the obtained pressure measurements identifying a diagnostic period utilized in calculating the pressure ratio.
1 . A method of evaluating a vessel of a patient, comprising:
obtaining pressure measurements from first and second instruments positioned within the vessel of the patient while the second instrument is moved longitudinally through the vessel from a first position to a second position and the first instrument remains stationary within the vessel;
generating, using the pressure measurements, a plot of a cumulative pressure ratio change over a time period when the second instrument is moved longitudinally through the vessel from the first position to the second position; and
outputting a screen display including:
a numerical value of a pressure ratio calculated using the pressure measurements; and
the plot of the cumulative pressure ratio change.
2 . The method of claim 1 , wherein the first position is distal of at least one stenosis of the vessel and wherein the second position is proximal of the at least one stenosis of the vessel such that moving the second instrument longitudinally through the vessel comprises a pullback.
3 . The method of claim 1 , further comprising:
calculating a plurality of pressure ratios using the pressure measurements.
4 . The method of claim 3 , wherein the generating the plot of the cumulative pressure ratio change using the pressure measurements comprises generating the plot of the cumulative pressure ratio change using the plurality of pressure ratios.
5 . The method of claim 3 , wherein each of the plurality of pressure ratios corresponds to a heartbeat cycle, a fixed amount of time, or a fixed amount of length that the second instrument is moved longitudinally through the vessel.
6 . The method of claim 1 , wherein the screen display comprises a first area comprising the numerical value and a second area comprising the plot of the cumulative pressure ratio change.
7 . The method of claim 6 , wherein the first area is adjacent to the second area.
8 . The method of claim 1 , wherein the pressure measurements are obtained while the first instrument remains stationary within a proximal portion of the vessel.
9 . The method of claim 1 , wherein the pressure measurements are obtained while the first instrument remains stationary within an aorta of the patient.
10 . The method of claim 1 , wherein the pressure measurements are obtained while the first instrument remains stationary within an ostium of the vessel.
11 . A system for evaluating a vessel of a patient, comprising:
a processing system in communication with first and second instruments sized and shaped for introduction into the vessel of the patient, the processing system configured to:
obtain pressure measurements from the first and second instruments while the second instrument is moved longitudinally through the vessel of the patient from a first position to a second position while the first instrument is maintained in a fixed longitudinal position with respect to the vessel;
generate, using the pressure measurements, a plot of a cumulative pressure ratio change over a time period when the second instrument is moved longitudinally through the vessel from the first position to the second position; and
output a screen display including:
a numerical value of a pressure ratio calculated using the pressure measurements; and
the plot of the cumulative pressure ratio change.
12 . The system of claim 11 , wherein the first position is distal of at least one stenosis of the vessel and wherein the second position is proximal of the at least one stenosis of the vessel such that moving the second instrument longitudinally through the vessel comprises a pullback.
13 . The system of claim 11 , wherein the processing system is configured to:
calculate a plurality of pressure ratios using the pressure measurements.
14 . The system of claim 13 , wherein the processing system is configured to generate the plot of the cumulative pressure ratio change using the plurality of pressure ratios.
15 . The system of claim 13 , wherein each of the plurality of pressure ratios corresponds to a heartbeat cycle, a fixed amount of time, or a fixed amount of length that the second instrument is moved longitudinally through the vessel.
16 . The system of claim 11 , wherein the screen display comprises a first area comprising the numerical value and a second area comprising the plot of the cumulative pressure ratio change.
17 . The system of claim 16 , wherein the first area is adjacent to the second area.
18 . The system of claim 11 , wherein the pressure measurements are obtained while the first instrument remains stationary within a proximal portion of the vessel.
19 . The system of claim 11 , wherein the pressure measurements are obtained while the first instrument remains stationary within an aorta of the patient.
20 . The system of claim 11 , wherein the pressure measurements are obtained while the first instrument remains stationary within an ostium of the vessel.