Injection device including a controlled-flow needle

摘要

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 longer exerted towards the administration position (12); and wherein the pressure exerted on the flow controller (10) is exerted only by the anesthesiologist's dominant hand.

主权项

1. Injection device comprising:
a needle or cannula with standard coating for performing nerve blocks; a first independent line for administering local anaesthetic a second independent aspiration line; and at least one high-pressure syringe and a mechanical aspiration syringe; said controlled-flow needle also comprises a manual flow control element which by sliding it switches from a neutral position to an aspiration position and from there to an administration position, wherein the manual flow control element is only maintained in the administration position while a continuous pressure is applied to and maintained on the manual flow control element such that if the continuous pressure on the manual flow control element is not maintained the manual flow control element returns to the aspiration position; and wherein said aspiration position enables the connection between the second independent aspiration line and the needle, while the administration position enables the connection between the first independent administration line and the needle or cannula, wherein a portion of a conduit is located within the manual flow control element and is configured to move when the manual flow control element switches from the neutral position to the aspiration position and from the aspiration position to the administration position, and wherein the first independent line and the second independent aspiration line each have a first line portion and a second line portion, respectively, that is located within the manual flow control element and located adjacent to the portion of the conduit.