Cannulated Medical Instrument Handle With an Airspace

A handle apparatus for a medical instrument comprising:

• a housing component;
• wherein said housing component is made of a first thermally conductive material and includes an interior housing channel,
• wherein said interior housing channel has a threaded portion and a portion adapted to receive a tubular insert, wherein said tubular insert comprised of a second thermally conductive material;
• wherein said housing component includes
• a first housing diameter D1 which corresponds to the external diameter of said housing component,
• a second housing diameter D2 which corresponds to a first internal diameter of said housing component located within said threaded interior portion,
• a third housing diameter D3 which corresponds to a second internal diameter of said housing component located within said portion adapted to receive a tubular insert,
• a first housing length L1 which corresponds to the external length of said housing component,
• a first channel length L2 which corresponds to a first interior channel length of said threaded interior portion, and
• a second channel length L3 which corresponds to a second interior channel length of said portion adapted to receive a tubular insert;
• a tubular insert adapted for insertion into said housing channel having an internal diameter Dtubint and external diameter Dtubext wherein Dtubext<D3 and a temperature T wherein said having an interior lumen temperature T, wherein T is about 243 to 297 degrees Fahrenheit during sterilization;
• an airspace chamber located between said interior housing channel and said tubular insert wherein the radial dimension of said airspace chamber is defined by D3−Dtubext.