Cannula and obturator with a transparent tip with an opaque component

A cannula system for accessing a blood mass in the brain of a patient, said cannula system comprising:

• a cannula comprising a cannula tube with a proximal end and a distal end and a lumen extending from the proximal end to the distal end;
• and
• an obturator comprising an obturator shaft having a proximal end and a distal end, and an obturator tip disposed on the distal end of said obturator shaft, said obturator tip being optically transmissive, said obturator tip having a transverse cross-section closely matching a transverse cross-section of the cannula lumen, said obturator tip having a tapered distal tip, said obturator being slidable within the cannula tube, and positionable within the cannula tube such that the proximal end of the obturator shaft extends proximally out of the cannula proximal end while the tapered distal tip extends out of the cannula tube distal end, wherein the obturator shaft has a transverse cross-section smaller than the lumen of the cannula and smaller than the transverse cross-section of the obturator tip, whereby a proximal surface of the obturator tip is visible from the proximal end of the cannula tube, through the lumen, when the obturator tip is disposed within the cannula such that the tapered distal tip extends out of the cannula tube distal end;
• and
• an optically opaque component disposed along a central longitudinal axis of the obturator tip, within the tapered distal tip;
• wherein
• the obturator tip comprises a proximal portion, a central cylindrical portion, and wherein the tapered distal tip is a distal conical portion, and the obturator further comprises a bore extending from a proximal-most extent of the proximal portion, distally into the central cylindrical portion, and the distal end of the obturator shaft is disposed within the bore, where the bore has a length such that, when the proximal end of the obturator shaft extends proximally out of the cannula tube proximal end the tapered distal tip extends out of the cannula tube distal end, the bore terminates distally at a point distal to the distal end of the cannula tube.