US 12,458,747 B2
Angiogram injections using electrocardiographic synchronization
Matthew James Russell Bakken, Bloomington, MN (US)
Assigned to ACIST Medical Systems, Inc., Eden Prairie, MN (US)
Filed by ACIST Medical Systems, Inc., Eden Prairie, MN (US)
Filed on Mar. 23, 2023, as Appl. No. 18/125,254.
Application 18/125,254 is a division of application No. 16/996,083, filed on Aug. 18, 2020, granted, now 11,633,534.
Prior Publication US 2023/0218818 A1, Jul. 13, 2023
Int. Cl. A61M 5/00 (2006.01); A61J 7/04 (2006.01); A61M 5/142 (2006.01); A61M 5/145 (2006.01); A61M 5/168 (2006.01); A61M 5/172 (2006.01); A61B 6/00 (2006.01)
CPC A61M 5/007 (2013.01) [A61J 7/0481 (2013.01); A61M 5/14228 (2013.01); A61M 5/14546 (2013.01); A61M 5/16827 (2013.01); A61M 5/1684 (2013.01); A61M 5/16877 (2013.01); A61M 5/16886 (2013.01); A61M 5/1723 (2013.01); A61B 6/481 (2013.01); A61M 2205/3379 (2013.01); A61M 2205/50 (2013.01); A61M 2205/583 (2013.01); A61M 2230/04 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A non-transitory computer-readable storage medium containing instructions that, when executed, cause one or more processors of an injection system to:
receive two or more injection characteristic inputs, wherein the two or more injection characteristic inputs comprise at least a number of images to be taken and an image quality input;
determine, based on the two or more injection characteristic inputs, an injection schedule that includes a first flow rate for injection fluid during systolic injection phases and a second flow rate for injection fluid during diastolic injection phases, wherein the injection schedule comprises an initial diastolic injection phase and one or more systolic/diastolic injection phase pairs, wherein each of the one or more systolic/diastolic injection phase pairs comprises a complete systolic injection phase and a complete diastolic injection phase, wherein the injection schedule ends with a complete diastolic injection phase portion of one of the one or more systolic/diastolic injection phase pairs, and wherein the second flow rate during the diastolic injection phases is based at least in part on the image quality input; and
control the injection system to inject injection fluid from a fluid reservoir of the injection system into a body of a patient according to the injection schedule;
wherein the instructions that cause the one or more processors to control the injection system to inject the injection fluid comprise instructions that, when executed, cause the one or more processors to, during each systolic/diastolic injection phase pair:
detect, from an electrocardiogram of the patient, a beginning of a systole;
responsive to detecting the beginning of the systole, control the injection system to begin injecting the injection fluid from the fluid reservoir into the patient at the first flow rate;
detect, from the electrocardiogram of the patient, an ending of the systole and a beginning of a diastole; and
responsive to detecting the beginning of the diastole, control the injection system to stop injecting the injection fluid at the first flow rate and begin injecting the injection fluid from the fluid reservoir at the second flow rate; and
wherein the instructions, when executed, further cause the one or more processors to:
receive data descriptive of the electrocardiogram; and
determine, based on the data descriptive of the electrocardiogram, an average systole length for the patient; and
wherein the instructions that cause the one or more processors to detect the ending of the systole and the beginning of the diastole comprise instructions that, when executed, cause the one or more processors to, after detecting the beginning of the systole, determine that an amount of time equal to the average systole length has passed since detecting the systole.