Spinal cannula with transparent grip part

A spinal cannula and grip part, comprising:

• a grip part formed of a transparent plastic with a cerebrospinal fluid checking chamber defined within the grip part, said cerebrospinal fluid checking chamber being visible through said transparent plastic of said grip part, said grip part having a proximal end and a distal end, said distal end having a conical Luer plug-type bore, said grip part having an outer surface with a first flange located adjacent to said Luer bore and a second flange and grip surfaces disposed diametrically opposed and symmetrically with respect to a plane of symmetry located in a longitudinal axis of the grip part, said grip surface being recessed radially with respect to said first flange part and said second flange part, said cerebrospinal fluid checking chamber being arranged between said grip surfaces with said cerebrospinal fluid checking chamber extending substantially over an axial distance between said first flange part and said second flange part, said cerebrospinal fluid checking chamber having a taper toward a proximal end of said grip part, said cerebrospinal fluid checking chamber having a substantially rectangular cross-sectional shape defined by a first pair of opposed flat wall surfaces and a second pair of opposed flat wall surfaces, said first pair of wall surfaces being provided in a wedge shape and said second pair of wall surfaces being provided in a wedge shape, said first pair of wall surfaces being arranged symmetrically with respect to said plane of symmetry of said grip surfaces and having an angle defining said wedge shape which is smaller than an angle defining said wedge shape of said second pair of wall surfaces;
• a cannula extending into a proximal end of said grip part;
• a Luer plug-type cone disposed in a positive locking manner in said Luer plug-type bore;
• and
• a stylet positioned in said cannula extending through said cerebral fluid checking chamber.