US 11,701,463 B2
Infusion set for measuring vital signals of a patient comprising a compliance element and a reflective element
Paolo Rovatti, Modena (IT); Mariano Ruffo, Naples (IT); David Stefani, Modena (IT); and Elena Grandi, Modena (IT)
Assigned to BAXTER INTERNATIONAL INC., Deerfield, IL (US); and BAXTER HEALTHCARE SA, Clattpark (CH)
Appl. No. 16/956,829
Filed by Baxter International Inc., Deerfield, IL (US); and Baxter Healthcare SA, Glattpark (CH)
PCT Filed Dec. 21, 2018, PCT No. PCT/EP2018/086627
§ 371(c)(1), (2) Date Jun. 22, 2020,
PCT Pub. No. WO2019/122348, PCT Pub. Date Jun. 27, 2019.
Claims priority of application No. 17210526 (EP), filed on Dec. 22, 2017.
Prior Publication US 2021/0001043 A1, Jan. 7, 2021
Int. Cl. A61M 5/172 (2006.01); A61M 5/142 (2006.01); A61M 5/14 (2006.01); A61M 5/168 (2006.01)
CPC A61M 5/142 (2013.01) [A61M 5/1411 (2013.01); A61M 5/14228 (2013.01); A61M 5/16813 (2013.01); A61M 5/16854 (2013.01); A61M 5/1723 (2013.01); A61M 5/1407 (2013.01); A61M 2205/3331 (2013.01); A61M 2205/3341 (2013.01); A61M 2206/22 (2013.01); A61M 2230/06 (2013.01); A61M 2230/30 (2013.01); A61M 2230/42 (2013.01)] 25 Claims
OG exemplary drawing
 
1. An IV infusion set, comprising:
a patient access configured to connect to a vascular system of a patient;
a source of a medical fluid;
an infusion line having at least one first end configured to connect to the medical fluid source and at least one opposite second end configured to deliver the medical fluid towards the patient access, the infusion line defining at least a medical fluid path developing from the first end of the infusion line to the patient access, the second end of the infusion line being connected to the patient access, the medical fluid source being coupled to the first end of the infusion line and configured to supply the medical fluid to the infusion line; an infusion apparatus arranged on the infusion line;
a sensor configured to emit a pressure signal indicative of a pressure of the medical fluid in the infusion line; and
a processor configured to receive the pressure signal and to determine a patient signal indicative of a vital signal of the patient based on the pressure signal;
wherein the infusion apparatus includes a pump;
wherein the IV infusion set further comprises:
a compliance element configured to attenuate pressure variations of medical fluid the infusion line; and
a resistance element configured to reflect pressure waves moving along the infusion line;
wherein the sensor is arranged on the infusion line at a position downstream from the resistance element with respect to a direction of fluid flow along the infusion line from the medical fluid source towards the patient access,
wherein the compliance element is arranged downstream from the pump with respect to the direction of fluid flow along the infusion line from the medical fluid source towards the patient access, and
wherein the compliance element is arranged upstream from the resistance element with respect to the direction of fluid flow along the infusion line from the medical fluid source towards the patient access, wherein the resistance element restricts flow of the medical fluid along the infusion line through the resistance element and the compliance element comprises a drip chamber.