Medical connectors need to be small, lightweight, and comfortable in use, but built for rugged handling and extended performance and reliability. These miniature medical interconnects suit those needs. Standard and custom designs and shapes have been applied to catheters, probes, and instruments. Applications include neurologic testing system, laser surgery tools, bone healing stimulators, and blood temperature measuring catheters. Built-in connectors can be molded inside medical analysis tools and probes. Solid models for design planning are available on the web. Standard sizes and shapes are available off-the-shelf for sample review and prototyping.