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Generation III: Spring-Loaded Needles

This syringe type features a spring-loaded needle held at the nozzle by a bushing. When displaced by the plunger, the bushing releases the spring, which expands and retracts the needle back within the plunger cavity. On the way a plug at the end of the plunger is also displaced.

The bushing can also be displaced by in-advertent advance of the plunger. In rare circumstances the bushing may be displaced by hydraulic pressure in barrel with premature retraction.

   

Sample Syringes


Spring Loaded Needles

Spring Loaded Needles
 

© 2005 Dr. Sakharam D. Mahurkar, M.D. FACP
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