Improved Biopsy Punch Tool

A biopsy remains the only definitive way to diagnose cancer. Among the various types, a punch biopsy is commonly used to extract a small column of skin tissue for analysis.

Currently, this procedure is inefficient—requiring multiple instruments. Three separate tools are used: a punch blade, a pair of forceps, and a pair of scissors. Each tool requires actuation, and transitioning between tools introduces unnecessary time and effort required by the individual performing the procedure. The ultimate goal of this project is to develop an all-in-one tool for the punch biopsy procedure, ultimately saving time and effort. 

The final design solution consisted of two main components: a pulling and a cutting component. To operate the device, the surgeon begins by making a circular incision using the punch blade tip, identical to those used in standard punch tools. Next, with one hand stabilizing the base plate and the other gripping the top of the inner column, the surgeon simultaneously presses down the base plate and pulls upward on the tool. This coordinated motion presses down the surrounding skin while closing the tweezers on the side of the punch blade to secure the extracted tissue column. After sufficient height is pulled, the surgeon can engage the cutting mechanism that is located on the bottom of the base plate with the hand that was holding it.

This project introduces a novel biopsy solution that improves current clinical workflows by combining three steps into one tool, enabling solo operation. By reducing time, tool-switching, and reliance on assistance, this innovation can streamline minor surgical procedures and is especially valuable in resource-limited healthcare settings.