Abstract: The invention concerns a use of argon gas administered by inhalation in order to directly protect or preserve haemodynamics and to prevent cardiovascular failure by controlling the blood flow, blood pressure and blood diffusion throughout the body of a human patient suffering from cardiovascular disease requiring heart or vascular surgery, in particular an aneurysm of the aorta, a myocardial ischaemia, a severe heart failure or a cardiopathy requiring a surgical operation. The argon is preferably mixed with oxygen.

Abstract: The invention relates to an inhalable gaseous medicament containing argon gas for use in combination with a mechanical thrombectomy for treating, reducing or resorbing brain lesions subsequent to an ischaemic stroke in an individual. Preferably, the proportion by volume of argon is between 30 and 79%. The mechanical thrombectomy can be accompanied by a drug-based thrombolysis to dissolve the clot and to thin the blood of the patient.

Abstract: The invention relates to an inhalable gaseous medicament containing argon gas for use in combination with a mechanical thrombectomy for treating, reducing or resorbing brain lesions subsequent to an ischaemic stroke in an individual. Preferably, the proportion by volume of argon is between 30 and 79%. The mechanical thrombectomy can be accompanied by a drug-based thrombolysis to dissolve the clot and to thin the blood of the patient.

Abstract: A xenon-based anesthetic gas to be used, via inhalation, to maintain or preserve cerebral perfusion during an endarterectomy involving the clamping of the carotid artery in a mammal under general anesthesia. The xenon is preferably used in combination with at least one injectable anesthetic morphine agent such as remifentanil, sulfentanil, fentanyl, and alfentanil. Advantageously, the xenon is mixed with an oxygen-containing gas and administered to the patient after the patient has been anesthetized, put to sleep, and intubated. The use of xenon makes it possible to achieve a reduction in the pressure gradient during the clamping of the internal carotid artery relative to the usual anesthetic agents, and to achieve stable hemodynamics.

Abstract: The invention relates to a xenon-based anesthetic gas composition to be used, via inhalation, to maintain or preserve cerebral perfusion during an endarterectomy involving the clamping of the carotid artery in a mammal under general anesthesia. The xenon is preferably used in combination with at least one injectable anesthetic morphine agent such as remifentanil, sulfentanil, fentanyl, and alfentanil. Advantageously, the xenon is mixed with an oxygen-containing gas and administered to the patient after the patient has been anesthetized, put to sleep, and intubated. The use of xenon makes it possible to achieve a reduction in the pressure gradient during the clamping of the internal carotid artery relative to the usual anesthetic agents, and to achieve stable hemodynamics.