Translucent catheter hub and flashback chamber allows for easy detection of blood flashback at insertion. Precision finished PTFE catheter assures stable flow and eliminates catheter tip kink during venipuncture. Close and smooth contact between catheter tip and inner needle enables safe and smooth venipuncture. Use of hydrophobic membrane filter eliminates blood leakage. Crimped smooth engagement between catheter and hub, without use of adhesive, helps eliminate blood resisuals and helps reduce blood coagulation or hemolysis.