Blocking mechanism for a patient's skin incision device and a method of controlling of a skin incision device by a blocking mechanism

A skin incision device comprising:

• a housing;
• a push-button mounted to the housing in an initial push-button position, wherein the push-button is configured to be moved relative to the housing to be mounted to the housing in a final push-button position;
• a trigger mounted to the housing in an initial trigger position, wherein the initial push-button position of the push-button provides an initial contact between the trigger and the push-button to prevent the trigger from moving relative to the housing to a final trigger position;
• and
• a spring-loaded linkage biased against the trigger in the initial trigger position while supporting a cutting edge of a blade within the housing,
• wherein the trigger is configured to be moved to the final trigger position relative to the housing after the push-button is moved to the final push-button position relative to the housing to fire the spring-loaded linkage to extend the cutting edge of the blade outside of the housing and then retract the cutting edge of the blade back within the housing.