| 摘要 |
A safety catheter has a stand, a spring, a barrel, a hub, a cap and a seal. The stand and the spring are mounted slidably within the barrel. The stand has a proximal end, a distal end, an outer surface, a needle protruding from the proximal end and multiple annular notches formed in and extending radially inward from the outer surface. The barrel has a closed end, an open end, a hole formed in the closed end, and multiple clipper springs connected in the closed end and arranged around the hole. The clipper springs can clip the annular notches to hold the needle introduced into the hub and the needle with the hub is inserted into a patient. After insertion of the catheter is complete, the hub can be simply withdrawn from the catheter to let the needle retract in the barrel automatically to prevent accidental pricking of staff.
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