# US 11,298,459 B2 · Wearable medical device for monitoring intravenous injection > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,298,459 B2 - Document ID: US11298459B2 - Status: Granted - Kind: B2 - Application number: 16/027,425 - Filed: 2018-07-05 - Published: 2020-01-09 - Granted: 2022-04-12 - Earliest claimed: 2018-07-05 - Assignees: International Business Machines Corporation - Applicants: International Business Machines Corporation - Inventors: Jing Du; Tzu-Chen Chao; Ci-Wei Lan; Xiang Yu Yang; Chao Zhang; Xin Fang Hao - Web page: https://patentgrep.com/patent/US11298459B2 ## CPC - A61M 5/1723: {using feedback of body parameters, e.g. blood sugar or pressure} - A61M 5/16813: {by controlling the degree of opening of the flow line} - A61M 5/16877: {Passive flow controllers; Devices for setting a flow rate (clamp-type valves A61M39/28)} - G16H 20/17: delivered via infusion or injection - G16H 40/63: for local operation - G16H 40/67: for remote operation - A61M 5/14244: {adapted to be carried by the patient, e.g. portable on the body} - A61M 2005/1586: {Holding accessories for holding infusion needles on the body} - A61M 2205/18: with alarm - A61M 2205/33: Controlling, regulating or measuring - A61M 2205/3303: Using a biosensor - A61M 2205/3331: Pressure; Flow - A61M 2205/3334: Measuring or controlling the flow rate - A61M 2205/3379: Masses, volumes, levels of fluids in reservoirs, flow rates - A61M 2205/3389: Continuous level detection (A61M2205/3393 takes precedence) - A61M 2205/3553: remote, e.g. between patient's home and doctor's office - A61M 2205/3569: sublocal, e.g. between console and disposable - A61M 2205/3576: with non implanted data transmission devices, e.g. using external transmitter or receiver - A61M 2205/3584: using modem, internet or Bluetooth® - A61M 2205/50: with microprocessors or computers - A61M 2205/502: User interfaces, e.g. screens or keyboards - A61M 2205/52: with memories providing a history of measured variating parameters of apparatus or patient - A61M 2205/6009: for matching patient with his treatment, e.g. to improve transfusion security - A61M 2205/609: Biometric patient identification means - A61M 2210/083: Arms - A61M 2230/30: Blood pressure (A61M2230/04 takes precedence) - A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)} - G16H: HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA ## Abstract A wearable medical device comprising an annular housing configured to attach to a wrist of a patient. The wearable medical device having a first receptacle attached to the annular housing for receiving a first portion of a tube of an intravenous delivery system. The wearable medical device comprising a flow regulator attached to the annular housing and in contact with the first portion of the tube, where the flow regulator is configured to modify a geometric characteristic of the first portion of the tube. The wearable medical device further comprising a wireless transmitter for communicating with a user console. ## Claims ### Claim 1 A wearable medical device comprising: an annular housing configured to attach to a wrist of a patient; a first receptacle attached to the annular housing for receiving a first portion of a tube of an intravenous delivery system, wherein the first portion of the tube comprises a shape-memory polymer; a flow regulator attached to the annular housing and in contact with the first portion of the tube, wherein the flow regulator is configured to modify a geometric characteristic of the first portion of the tube by activating the shape-memory polymer, wherein activating the shape-memory polymer alters a curvature of the tube, wherein altering the curvature of the tube alters a flow of a medication in the tube; a pulse monitor attached to the annular housing and configured to contact the wrist of the patient and measure a pulse of the patient; and a wireless transmitter for communicating with a user console. ### Claim 2 (depends on 1) The wearable medical device according to claim 1, further comprising: a control unit comprising a processor and storing programmable logic executable by the processor to cause the processor to: receive, at the wireless transmitter and from the user console, a dosage, wherein the dosage comprises a drug type, a dosage flow rate, and a volume; receive, at the wireless transmitter and from a flow meter communicatively coupled to the wearable medical device, a first flow rate, wherein the first flow rate measures a flow rate in the first portion of the tube; compare the first flow rate to the dosage flow rate; determine that a difference between the first flow rate and the dosage flow rate is above a threshold; and modify the flow regulator to alter the geometric characteristic of the tube. ### Claim 3 (depends on 2) The wearable medical device according to claim 2, wherein the control unit is further configured to: receive biometric data from the pulse monitor; detect a patient condition based on the biometric data; and send an alert to the user console indicating the patient condition. ### Claim 4 (depends on 1) The wearable medical device according to claim 1, wherein at least a portion of the annular housing comprises an elastomer having an elastic modulus less than 1.0 gigapascals (GPa). ### Claim 5 (depends on 1) The wearable medical device according to claim 1, wherein the annular housing comprises a first hinge and a first fixing mechanism. ### Claim 6 (depends on 5) The wearable medical device according to claim 5, wherein the first fixing mechanism comprises a magnetic fixing mechanism. ### Claim 7 (depends on 5) The wearable medical device according to claim 5, wherein the first fixing mechanism comprises a mechanical fixing mechanism. ### Claim 8 (depends on 1) The wearable medical device according to claim 1, wherein the flow is altered by a shear stress applied to the medication in the tube at the curvature. ### Claim 9 (depends on 1) The wearable medical device according to claim 1, wherein altering the curvature of the tube is selected from a group consisting of: bending the tube, spiraling the tube, and twisting the tube. ### Claim 10 A wearable medical device comprising: an annular housing configured to attach to a wrist of a patient; a first receptacle attached to the annular housing for receiving a first portion of a tube of an intravenous delivery system, wherein the first portion of the tube comprises a shape-memory polymer; a flow regulator attached to the annular housing and in contact with the first portion of the tube, wherein the flow regulator is configured to alter a shear stress of a medication in the tube by activating the shape-memory polymer; a pulse monitor attached to the annular housing and configured to contact the wrist of the patient and measure a pulse of the patient; and a wireless transmitter for communicating with a user console. ### Claim 11 (depends on 10) The wearable medical device according to claim 10, further comprising: a control unit comprising a processor and storing programmable logic executable by the processor to cause the processor to: receive, at the wireless transmitter and from the user console, a dosage, wherein the dosage comprises a drug type, a dosage flow rate, and a volume; receive, at the wireless transmitter and from a flow meter communicatively coupled to the wearable medical device, a first flow rate, wherein the first flow rate measures a flow rate in the first portion of the tube; compare the first flow rate to the dosage flow rate; determine that a difference between the first flow rate and the dosage flow rate is above a threshold; and modify the flow regulator to alter the shear stress of the medication in the tube. ### Claim 12 (depends on 11) The wearable medical device according to claim 11, wherein the control unit is further configured to: receive biometric data from the pulse monitor; detect a patient condition based on the biometric data; and send an alert to the user console indicating the patient condition. ### Claim 13 (depends on 1) The wearable medical device according to claim 1, wherein the flow is altered by altered friction characteristics of the flow of the medication in the tube at the curvature.