Devices, systems, and methods using mating catheter tips and tools

A medical instrument system, comprising:

• an imaging probe including a distal tip, the distal tip including a first sealing feature comprising a first tapered profile formed on an external surface of the distal tip;
• and
• an elongated medical instrument having a distal portion, wherein the elongated medical instrument includes a working channel extending to an opening in the distal portion, wherein the distal portion includes a second sealing feature comprising a second tapered profile formed on an internal surface of the working channel,
• wherein the first tapered profile of the first sealing feature and the second tapered profile of the second sealing feature form a seal that prevents fluid from passing through the opening when the imaging probe is within the working channel of the elongated medical instrument and the first sealing feature contacts the second sealing feature.

A medical instrument system, comprising:

• an imaging probe including a distal tip, the distal tip including a sloped outer surface;
• and
• an elongated medical instrument having a distal portion, wherein the elongated medical instrument includes a working channel extending to an opening in the distal portion, wherein the distal portion includes a sloped internal surface of the working channel,
• wherein the sloped outer surface of the imaging probe and the sloped inner surface of the working channel form a seal that prevents fluid from passing through the opening when the imaging probe is within the working channel of the elongated medical instrument and the sloped inner surface contacts the sloped outer surface.