EP4216967A1 - Argon inhalé pour traiter un patient souffrant d'une pathologie cardiovasculaire - Google Patents
Argon inhalé pour traiter un patient souffrant d'une pathologie cardiovasculaireInfo
- Publication number
- EP4216967A1 EP4216967A1 EP21766507.4A EP21766507A EP4216967A1 EP 4216967 A1 EP4216967 A1 EP 4216967A1 EP 21766507 A EP21766507 A EP 21766507A EP 4216967 A1 EP4216967 A1 EP 4216967A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cardiac
- argon
- medicament according
- blood
- blood flow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K33/00—Medicinal preparations containing inorganic active ingredients
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/0012—Galenical forms characterised by the site of application
- A61K9/007—Pulmonary tract; Aromatherapy
- A61K9/0073—Sprays or powders for inhalation; Aerolised or nebulised preparations generated by other means than thermal energy
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P9/00—Drugs for disorders of the cardiovascular system
- A61P9/10—Drugs for disorders of the cardiovascular system for treating ischaemic or atherosclerotic diseases, e.g. antianginal drugs, coronary vasodilators, drugs for myocardial infarction, retinopathy, cerebrovascula insufficiency, renal arteriosclerosis
Definitions
- the invention relates to a use of argon gas administered by inhalation to directly protect or preserve hemodynamics and to prevent cardiovascular failure by controlling blood flow, blood pressure and blood distribution throughout the body of a human patient suffering from a cardiovascular pathology requiring cardiac or vascular surgery.
- cardiovascular pathologies can be the cause of haemodynamic disturbances and cardiac decompensation, in particular:
- myocardial ischemia or infarction is a necrosis of the heart resulting from poor blood perfusion of the heart. Its treatment aims to restore the perfusion to the arteries.
- cardiogenic shock characterized by a drop in cardiac blood flow is often observed, as well as other hemodynamic deteriorations, leading to a loss of efficiency of the blood perfusion and possible subsequent irreversible damage to one or more organs, such as kidneys, liver, intestines, pancreas, lungs, heart, limbs, brain... associated with a high risk of mortality.
- the problem is therefore to be able to maintain, that is to say preserve and/or protect the hemodynamics, in particular the cardiac blood flow, that is to say the cardiac function, the cardiovascular hemodynamics and effective blood perfusion of the abdominal organs, in a patient (or patients) suffering from a cardiovascular pathology requiring cardiac or vascular surgery so as to avoid or minimize all or part of the aforementioned problems and to prevent the deleterious effects of cardiogenic shock.
- a solution according to the invention relates to an inhalable gaseous drug containing argon gas for use in directly preserving and/or protecting hemodynamics and in preventing cardiovascular failure by controlling blood circulation, blood pressure and diffusion of blood throughout the body, in particular cardiac blood flow, of a human patient, ie an individual, suffering from a cardiovascular pathology requiring cardiac or vascular surgery, in which the inhalable gaseous drug is intended to be administered by inhalation said patient before the start of cardiac or vascular surgery.
- the gaseous drug based on argon of the invention is intended to act directly on the hemodynamic parameters, in addition and independently of a possible anti-ischemic action, so as to obtain a direct prevention of the cardiovascular failure likely to occur in the framework of the cardiovascular pathology under consideration.
- inhaled argon by virtue of its action on the vascular system and maintenance of cardiac output, makes it possible to ensure good perfusion pressure, thus reducing the need for recourse to complementary treatments, to prevent any cardiovascular failure. .
- preservation of hemodynamics means preservation of physiological functions, ie cardiovascular functions and their control by the autonomic nervous system, which allow control of blood circulation, its pressure and its distribution throughout the body, in particular cardiac blood flow, heart rate, right and left ventricular ejection pressures, vascular resistance and organ blood perfusion.
- preserving and/or to directly protect hemodynamics is meant a direct effect leading in particular to a reduction in pulmonary vascular resistance and an increase in right cardiac output but also in left cardiac output, with improvement of the aforementioned hemodynamic status and this, in addition to and/or independently of a possible anti-ischemic action.
- the invention relates to an inhalable gaseous drug containing argon gas for use in a method of directly preserving and/or protecting hemodynamics and preventing cardiovascular failure by controlling blood flow, the blood pressure and the diffusion of blood throughout the body, in particular for the protection of cardiac blood flow, of a human patient suffering from a cardiovascular pathology requiring cardiac or vascular surgery, said method comprising:
- the gaseous medicinal product of the invention may comprise one or more of the following characteristics:
- the cardiovascular pathology is an aortic aneurysm, myocardial ischemia, severe heart failure or heart disease requiring cardiac or vascular surgery.
- the oxygen content is at least 21% by volume (%vol.), preferably at least 25%vol.
- the oxygen content is at least 30%vol.
- the argon content is at least 30% vol., preferably at least 40% vol.
- the argon content is between 50 and 70% vol.
- - cardiac or vascular surgery includes anesthesia of the patient, in particular general.
- the patient's general anesthesia is likely to cause, in the absence of argon administration, a reduction in cardiac output, in particular by at least 10%, or even more.
- extracorporeal circulation or CEC or extracorporeal blood oxygenation, in particular via an oxygenation membrane, or ECMO.
- CEC cardiac or vascular surgery includes CEC with clamping of the aorta, in particular at the supraceliac or suprarenal level.
- - vascular surgery includes repair of an aneurysm of a large blood vessel, in particular the aorta.
- - vascular surgery includes repair of a large blood vessel aneurysm with clamping of said large blood vessel likely to cause haemodynamic disturbances, in particular an increase in cardiac afterload with a decrease in cardiac output.
- the protection of cardiac blood flow includes maintenance of cardiac flow with an attenuated decrease of at least 20% immediately after the start of cardiac or vascular surgery, in particular as soon as possible clamping, compared to surgery performed in the same conditions but without administration of argon gas.
- the protection of cardiac blood flow comprises maintaining cardiac blood flow by improving left ventricular pressure conditions, in particular diastolic, or left ventricular preload, in particular related to an effect on pulmonary circulation, and/or possibly ventricular pressure law.
- the protection of cardiac blood flow includes maintaining cardiac blood flow by acting on pulmonary and/or systemic circulation.
- the protection of cardiac blood flow includes maintaining hemodynamics, in particular cardiac blood flow, by dilating action argon on all or part of the blood vessels, in particular the pulmonary blood vessels.
- - general anesthesia includes administration to the patient of at least one anesthetic substance, for example halothane, isoflurane, desflurane, sevoflurane, thiopental, propofol, fentanyl, midazolam, remifentanyl, sufentanyl or nitrous oxide (i.e. N2O).
- anesthetic substance for example halothane, isoflurane, desflurane, sevoflurane, thiopental, propofol, fentanyl, midazolam, remifentanyl, sufentanyl or nitrous oxide (i.e. N2O).
- the gaseous medicinal product contains argon as an active ingredient.
- the patient is a human being, namely a man or a woman, whether a child, an adolescent, an adult, including the elderly.
- the gaseous medicine containing argon is packaged in a pressurized gas container, such as a pressurized gas cylinder.
- the gaseous medicinal product is packaged in the form of pure argon and the gaseous mixture is obtained or manufactured by extemporaneous mixing of the compounds (eg Ar and O2) on the site of use by means of a gas mixer, anesthesia respirator or other suitable gas delivery device.
- the compounds eg Ar and O2
- the mixture or the pure gas is obtained extemporaneously then administered to the patient by means of an anesthesia respirator configured to allow administration of this gaseous mixture.
- the gaseous medicinal product is suitable for administration by inhalation at an administration rate of between 1 and 30 L/min.
- the invention also relates to a use of an Ar/02 gas mixture containing argon (Ar) and oxygen (O2) (% mol.) according to the invention, for manufacturing an inhalable medicament making it possible to preserve and /or to directly protect hemodynamics and prevent cardiovascular failure by controlling blood circulation, blood pressure and blood circulation throughout the body, in particular to protect cardiac blood flow, of a human patient suffering from a cardiovascular condition requiring cardiac or vascular surgery, said inhalable medicament being formulated for and intended to be administered by inhalation to the patient, before the start of cardiac surgery or vascular, and then throughout the cardiac or vascular surgery, or even after termination of the cardiac or vascular surgery.
- Ar Ar/02 gas mixture containing argon (Ar) and oxygen (O2) (% mol.)
- the invention also relates to a method of treatment for directly preserving and/or protecting hemodynamics and preventing cardiovascular failure by controlling blood circulation, blood pressure and the diffusion of blood throughout the body. , in particular to protect the cardiac blood flow, of a human patient suffering from a cardiovascular pathology requiring cardiac or vascular surgery, in which: a) a patient is selected to undergo cardiac or vascular surgery, b) one administers by inhalation of an Ar/Ch gas mixture according to the invention to said patient, before and during, or even after, cardiac or vascular surgery.
- the processing method of the invention may comprise one or more of the following characteristics:
- the gas mixture is administered at a flow rate of between 1 and 30 L/min.
- the patient is an adult, an adolescent or a child.
- the gas mixture is administered via a respiratory interface for supplying gas to the patient, for example an intubation system or a respiratory mask.
- the gas mixture is packaged in a gas container fitted with a gas distribution valve block, preferably a valve block with integrated regulator or RDI.
- a gas distribution valve block preferably a valve block with integrated regulator or RDI.
- the gas container has a cylindrical body.
- the gas container has a cylindrical body made of metal or composite materials, in particular aluminum alloy or steel.
- the gas container is fitted with a gas distribution valve block protected by a protective cover, also called a "cap”, made of polymer or metal.
- the respiratory interface is fluidically connected to the gas container by a flexible pipe or the like serving to convey the gas.
- the respiratory interface is fluidically connected to a medical ventilator powered by the gas container, via one or more flexible pipes or the like serving to convey the gas.
- Fig. 1 schematizes cardiac output measured by a cardiac output valve before, during and after aortic ischemia
- Fig. 2 diagrams the dose of norepinephrine required to maintain stable blood pressure following reperfused aortic ischemia
- Fig. 3 schematizes the histological score of several organs
- Fig 4 schematizes the variations in pulmonary vascular resistance according to the different levels of supra-renal then supra-celiac clamping, during surgery in rabbits.
- the model used is a lagomorphic model of multiorgan failure by clamping the supra-celiac aorta.
- the rabbits were sedated by intravenous injection (Zoletil® 15mg/Kg), then intubated to be ventilated. Anesthesia is completed by intravenous administration of thiopental (10 mg/kg) and methadone hydrochloride (Comfortan® 0.6 mg/kg); and maintained as needed with boluses of thiopental.
- the supra-celiac aorta is clamped with an atraumatic clamp for 30 minutes.
- a bolus of unfractionated heparin 250 IU/kg is administered to the rabbit in question, 5 minutes before clamping.
- the effectiveness of the clamping is verified by the absence of aortic pulse downstream of the clamping. Similarly, the absence of thrombus is assessed by the presence of an aortic pulse after declamping.
- the rabbits are separated into 2 groups: - a Control Group (GT) inhaling a binary N2/O2 gas mixture containing 30% oxygen and the remainder nitrogen (% vol.).
- GT Control Group
- an Argon Group (AG) according to the invention inhaling an Ar/02 binary gas mixture containing 30% oxygen and the remainder argon (% vol.), i.e. 70% vol. of argon.
- Cardiac output is measured by a cardiac output valve before, during and after ischemia (Isch.) of the aorta.
- Fig. 1 The moments of clamping and unclamping of the aorta which correspond to cardiovascular surgery are indicated in Fig. 1.
- argon By its action on the cardiac output, argon allows, via the arterial network, a better distribution of the blood and therefore a better perfusion of the organs.
- argon having no effect on basal hemodynamic parameters, makes it possible, under conditions of cardiogenic stress, to maintain cardiac output and therefore good organ perfusion.
- the pH, HCO3- and lactate parameters are significantly preserved within normal values in the Argon group compared to the Control group.
- the pH is maintained at 7.16 in the Argon group, against a drop to 6.91 in the Control group.
- noradrenaline required to maintain stable blood pressure following reperfused aortic ischemia (at T0) are shown in Fig. 2. It can be seen that after 15 minutes of reperfusion, the doses of norepinephrine are 3.4 ⁇ 1.0 pg/kg/min in the Control Group and 1.4 ⁇ 0.6 pg/kg/min in the group Argon. At the end of the 300-minute follow-up, the norepinephrine requirements reach 12.6 ⁇ 3.0 pg/kg/min in the Control group compared with 3.3 ⁇ 1.6 pg/kg/min in the Argon group.
- the inhaled argon through its action on the vascular system and maintenance of cardiac output makes it possible to maintain good perfusion pressure, thus reducing the need for recourse to complementary treatments, to prevent any cardiovascular failure.
- Fig. 3 represents the histological score of several organs: heart, liver, lungs, kidneys and jejunum (i.e. intestines).
- tubular necrosis lesions are significantly greater in the Control Group than in the Argon Group.
- Argon demonstrates, under conditions of interrupted circulation, a protective effect on the noble organs, essential to life, downstream of the interrupted arterial network.
- argon by maintaining the cardiac output and therefore the perfusion of the organs, consequently makes it possible to maintain in good condition the noble organs essential to life downstream of the interrupted arterial network.
- a first clamping of the aorta of these rabbits was performed above the renal artery, followed by clamping at the supra-celiac level.
- the objective is to see the effect of argon during a progressive modification of systemic resistance.
- Fig 4 shows the calculated pulmonary vascular resistances in 4 animals exposed to oxygen-enriched air compared to 4 animals exposed to a mixture of argon (70 vol. %) and oxygen (30 vol. %) at the during ascending aortic clamping.
- inhalation of argon allows maintenance of the hemodynamic parameters, direct prevention of cardiovascular failure by direct attenuation of decrease in cardiac output, state of shock, in addition and independently of anti-ischemic effects on renal and hepatic lesions.
- the cardiac output is indeed initially similar in the two groups then significantly higher after 300 minutes of reperfusion in the group treated with argon according to the invention.
- inhalation of argon makes it possible to reduce the risk of cardiogenic shock likely to have fatal consequences for the patient during cardiac or vascular surgery.
- a gaseous drug based on argon gas is therefore used, administered by inhalation at least before and during cardiovascular surgery, to directly protect or preserve hemodynamics, in particular cardiac blood flow, and to prevent any failure cardiovascular disease by monitoring blood circulation, blood pressure and blood circulation throughout the body of a human patient suffering from a cardiovascular pathology requiring cardiac or vascular surgery.
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- Health & Medical Sciences (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Chemical & Material Sciences (AREA)
- Medicinal Chemistry (AREA)
- Pharmacology & Pharmacy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Engineering & Computer Science (AREA)
- Epidemiology (AREA)
- Organic Chemistry (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Vascular Medicine (AREA)
- Urology & Nephrology (AREA)
- Heart & Thoracic Surgery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Cardiology (AREA)
- Otolaryngology (AREA)
- Pulmonology (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2009617A FR3114236B1 (fr) | 2020-09-23 | 2020-09-23 | Argon inhalé pour traiter un patient souffrant d’une pathologie cardiovasculaire |
| PCT/EP2021/075099 WO2022063619A1 (fr) | 2020-09-23 | 2021-09-13 | Argon inhalé pour traiter un patient souffrant d'une pathologie cardiovasculaire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4216967A1 true EP4216967A1 (fr) | 2023-08-02 |
Family
ID=74125362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21766507.4A Pending EP4216967A1 (fr) | 2020-09-23 | 2021-09-13 | Argon inhalé pour traiter un patient souffrant d'une pathologie cardiovasculaire |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20230364130A1 (fr) |
| EP (1) | EP4216967A1 (fr) |
| FR (1) | FR3114236B1 (fr) |
| WO (1) | WO2022063619A1 (fr) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3004350A1 (fr) * | 2013-04-12 | 2014-10-17 | Air Liquide | Delivrance de gaz medical a un receveur de materiel biologique |
| US10828436B2 (en) * | 2016-04-05 | 2020-11-10 | Vanderbilt University | Administering the noble gas argon during cardiopulmonary resuscitation |
| EP3424550A1 (fr) * | 2017-07-06 | 2019-01-09 | Monatomics Technology | Des mélanges gazeux contenant de faibles concentrations de xénon et de le argon assurer une neuroprotection sans inhiber le activité catalytique d'agents thrombolytiques |
-
2020
- 2020-09-23 FR FR2009617A patent/FR3114236B1/fr active Active
-
2021
- 2021-09-13 EP EP21766507.4A patent/EP4216967A1/fr active Pending
- 2021-09-13 WO PCT/EP2021/075099 patent/WO2022063619A1/fr not_active Ceased
- 2021-09-13 US US18/028,164 patent/US20230364130A1/en active Pending
Non-Patent Citations (4)
| Title |
|---|
| BALZER CLAUDIUS ET AL: "Argon Ventilation Improves Circulation During Cardiopulmonary Resuscitation in a Porcine Model of Cardiac Arrest", CIRCULATION, vol. 136, no. (suppl 1), 14 November 2017 (2017-11-14), pages A18203, XP055809867 * |
| BR�CKEN ANNE ET AL: "Influence of argon on temperature modulation and neurological outcome in hypothermia treated rats following cardiac arrest", RESUSCITATION, ELSEVIER, IE, vol. 117, 1 June 2017 (2017-06-01), pages 32 - 39, XP085116771, ISSN: 0300-9572, DOI: 10.1016/J.RESUSCITATION.2017.05.029 * |
| RISTAGNO G ET AL: "Postresuscitation treatment with argon improves early neurological recovery in a porcine model of cardiac arrest", SHOCK (PHILADELPHIA), LIPPINCOTT WILLIAMS & WILKINS, GB, vol. 41, no. 1, 1 January 2014 (2014-01-01), pages 72 - 78, XP002765419, ISSN: 1540-0514, DOI: 10.1097/SHK.0000000000000049 * |
| See also references of WO2022063619A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US20230364130A1 (en) | 2023-11-16 |
| WO2022063619A1 (fr) | 2022-03-31 |
| FR3114236A1 (fr) | 2022-03-25 |
| FR3114236B1 (fr) | 2023-08-04 |
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