# US 2018/0021216 A1 · Method to Increase The Efficacy of Cardiopulmonary Resuscitation By Means of Alternating Phases During Which The Physical Characteristics of Chest Compression Are Varied So As to Increase Overall Forward Blood Flow > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0021216 A1 - Document ID: US20180021216A1 - Status: Published application - Kind: A1 - Application number: 15/657,078 - Filed: 2017-07-21 - Published: 2018-01-25 - Earliest claimed: 2016-07-22 - Inventors: Norman A. Paradis - Web page: https://patentgrep.com/patent/US20180021216A1 ## CPC - A61H 31/006: {Power driven} - A61H 31/008: {Supine patient supports or bases, e.g. improving air-way access to the lungs} - A61H 2230/045: used as a control parameter for the apparatus - A61H 2230/08: Other bio-electrical signals - A61H: PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY (electrotherapy, magnetotherapy, radiation therapy or ultrasound therapy A61N) ## Abstract A method to increase the overall hemodynamic efficacy of cardiopulmonary resuscitation (CPR) by alternating between chest compression-decompression cycles optimized to either cardiac output or venous return. The phases of cardiac output and venous return enhancement may themselves by adjusted in their duration and character. The method may enhance mechanical and manual techniques delivered to the anterior or circumferential chest, and be synchronized to adjunctive techniques such as airway, ventilatory or abdominal therapies. ## Claims ### Claim 1 1) A method to increase the overall hemodynamic efficacy of external chest compressions performed during cardiopulmonary resuscitation on a patient comprising: applying two or more chest compression-decompression cycles (CCDC's) to the patient, wherein applying the two or more CCDC's to the patient includes applying a first set of CCDC's optimized for cardiac output and applying a second set of CCDC's optimized for venous return; and wherein the first set of CCDC's optimized for cardiac output is performed alternately with the second set of CCDC's optimized for venous return to enhance hemodynamic efficacy. ### Claim 2 (depends on 1) 2) The method according to claim 1 wherein the first set of CCDC's comprises at least one of the following types of CCDC's: Greater compressive force/speed, Greater depth of compression, More frequent compressions, and Shortened relaxation phase. ### Claim 3 (depends on 1) 3) The method according to claim 1 wherein the second set of CCDC's comprises at least one of the following types of CCDC's: Active decompression, Increased force/speed of active decompression, Prolonged decompression phase, and Airway occlusion during decompression. ### Claim 4 (depends on 1) 4) The method according to claim 1 wherein at least one of the first and second sets of CCDC's comprises a single CCDC cycle. ### Claim 5 (depends on 1) 5) The method according to claim 1 wherein at least one of the first and second sets of CCDC's comprises at least five CCDC cycles. ### Claim 6 (depends on 1) 6) The method according to claim 1 wherein at least one of the first and second sets of CCDC's comprises at least 10 CCDC cycles. ### Claim 7 (depends on 1) 7) The method according to claim 1 wherein at least one of the first and second sets of CCDC's comprises at least 100 CCDC cycles. ### Claim 8 (depends on 1) 8) The method according to claim 1 where at least one of the first and second sets of CCDC's comprises a duration of at least 5 seconds. 9) The method according to claim 1 wherein at least one of the first and second sets of CCDC's comprises a duration of at least 10 seconds. ### Claim 10 (depends on 1) 10) The method according to claim 1 wherein at least one of the first and second sets of CCDC's comprises a duration of at least 100 seconds. ### Claim 11 (depends on 1) 11) The method according to claim 1 wherein a ratio of time intervals of the first and second set of CCDC's is one to one. ### Claim 12 (depends on 1) 12) The method according to claim 1 wherein a ratio of time intervals of the first and second set of CCDC's is not one to one. ### Claim 13 (depends on 1) 13) The method according to claim 1 wherein a ratio of time intervals of the first and second set of CCDC's is equal. ### Claim 14 (depends on 1) 14) The method according to claim 1 wherein a ratio of time intervals of the first and second set of CCDC's is not equal. ### Claim 15 (depends on 1) 15) The method according to claim 1 wherein the first set of CCDC's optimized for cardiac output comprises a first interval of multiple CCDC's and the second set of CCDC's optimized for venous return comprises a second interval of multiple CCDC's. ### Claim 16 (depends on 1) 16) The method according to claim 1 wherein an incremental transition occurs from the first set of CCDC's optimized for cardiac output to the second set of CCDC's optimized for venous return. 17) The method according to claim 1 wherein applying the first set of CCDC's optimized for cardiac output and applying the second set of CCDC's optimized for venous return comprises applying the first and second sets of CCDC's in a repeating interval. ### Claim 18 (depends on 1) 18) The method according to claim 1 wherein the first set of CCDC's comprises at least one of the following types of CCDC's: greater compressive force, greater compressive speed, greater depth of compression, more frequent compressions, prolonged compression phase relative to relaxation, lessened active decompression, decreased force of decompression, decreased speed of decompression, and shortened decompression phase. ### Claim 19 (depends on 1) 19) The method according to claim 1 wherein the second set of CCDC's comprises at least one of the following types of CCDC's: greater active decompression, increased force of decompression, increased speed of decompression, lengthened decompression phase, lessened compressive force, lessened compressive speed, lessened depth of compression, and prolonged decompression phase. ### Claim 20 (depends on 1) 20) The method according to claim 1 wherein a duration or ratio of patterns of at least one of the first and second CCDC's is adjusted based on a biomarker measurement obtained from the patient. ### Claim 21 (depends on 1) 21) The method according to claim 1 wherein a pattern of transition from the first set of CCDC's optimized for cardiac output to the second set of CCDC's optimized for venous return is adjusted based on a biomarker measurement obtained from the patient. ### Claim 22 (depends on 1) 22) The method according to claim 1 wherein the cardiopulmonary resuscitation is provided by circumferential or partial circumferential constriction and relaxation of the chest. ### Claim 23 (depends on 1) 23) The method according to claim 1 wherein the cardiopulmonary resuscitation is provided by a mechanical device. ### Claim 24 (depends on 1) 24) The method according to claim 1 wherein the cardiopulmonary resuscitation is provided by an automated chest compression device. ### Claim 25 (depends on 1) 25) The method according to claim 1 wherein the first set of CCDC's comprises Greater compressive force/speed, Greater depth of compression, More frequent compressions, and Shortened relaxation phase, and the second set of CCDC's comprises active decompression, Increased force/speed of active decompression, Prolonged decompression phase, and Airway occlusion during decompression and the ratio of the first set to the second set is 3 to 2. ### Claim 26 (depends on 1) 26) The method according to claim 1 wherein CCDC's, or their respective phases, are further enhanced by phasic manipulation of the abdomen. ### Claim 27 (depends on 1) 27) The method according to claim 1 wherein CCDC's, or their respective phases, are further enhanced by phasic alteration in ventilation pattern or pressures. ### Claim 28 (depends on 1) 28) The method according to claim 1 wherein the CCDC's, or their respective phases, are further enhanced by phasic alteration in the patient's body position or a portion of the patient's body chosen from a list that includes the head, neck, chest, abdomen, arms or legs.