Pen type device for ultrasound guided fine needle aspiration cytology and biopsy

A pen type device for ultrasound guided fine needle aspiration cytology and biopsy comprising:

• a hollow body having a needle hole formed at the front end thereof, the body being hollow at the rear end;
• a sliding part slidably mounted inside the body;
• elastic members mounted around the sliding part and inside the body to provide elasticity to return the sliding part backward;
• a syringe having a cylinder mounted at the front end of the sliding part and a needle drawn out from or inserted into the needle hole by a back-and-forth movement of the sliding part;
• a rotating part disposed at a front end of the sliding part and inside the body to rotate the syringe when the sliding part moves back and forth;
• a head screw-coupled to the rear end of the sliding part and drawn out from the body to control a movement distance of the sliding part according to the length that the head is screw-coupled with the sliding part;
• and
• a negative pressure generating part mounted on the body to generate negative pressure to the syringe by pulling a piston of the syringe when a button located on the outer face of the body is pushed.