Abstract: Modified medical syringe with a flow regulator for the administration of anaesthesia, which allows for anaesthesiologists to handle the needle, control continuous aspiration and administer the anaesthetic with a single hand, thereby preventing intravascular injections. It comprises a flexible tube, designed to be introduced inside the barrel, which supplies the anaesthetic; a cylindrical body located on the rod, equipped with a protuberance along a semicircle located on the proximal side of the body and a through-hole wherein one end of the flexible tube may be introduced; a cylindrical cap located inside the syringe barrel, equipped with a longitudinal groove along its cylindrical side, which is designed to house the aforementioned flexible tube; a preloaded spring around the rod located between the cap and the support disk; and a pressurization device connected to the flexible tube.

Abstract: Controlled-flow needle injection device comprising a needle or cannula (1) with standard coating for performing nerve blocks; a first independent line for administering local anaesthetic (4) connected to a high-pressure syringe; and a second independent aspiration line (5) connected to a mechanical aspiration syringe; characterized in that it comprises a manual flow control element (10) having a first aspiration position (11) that enables the connection between the needle or cannula (1) and the aspiration line (5); a second administration position (12) that enables the connection between the first independent administration line (4) and the needle or cannula (1); and a third neutral position (13) without administration or aspiration; and wherein by sliding it switches from a neutral position (13) to an aspiration position (11) and from there to an administration position (12) by means of continuous pressure exerted by the anesthesiologist, returning to the aspiration position (11) when said pressure is no lon

Abstract: Controlled-flow needle injection device comprising a needle or cannula (1) with standard coating for performing nerve blocks; a first independent line for administering local anaesthetic (4) connected to a high-pressure syringe; and a second independent aspiration line (5) connected to a mechanical aspiration syringe; characterised in that it comprises a manual flow control element (10) having a first aspiration position (11) that enables the connection between the needle or cannula (1) and the aspiration line (5); a second administration position (12) that enables the connection between the first independent administration line (4) and the needle or cannula (1); and a third neutral position (13) without administration or aspiration; and wherein by sliding it switches from a neutral position (13) to an aspiration position (11) and from there to an administration position (12) by means of continuous pressure exerted by the anaesthesiologist, returning to the aspiration position (11) when said pressure is no lo