![Surgeons' Hall Museums on Twitter: "This hypodermic syringe has a thread packed piston. In this case, the piston is screwed in so that the injection can be measured and controlled. This may Surgeons' Hall Museums on Twitter: "This hypodermic syringe has a thread packed piston. In this case, the piston is screwed in so that the injection can be measured and controlled. This may](https://pbs.twimg.com/media/D3TQhBgXsAETZX2.jpg)
Surgeons' Hall Museums on Twitter: "This hypodermic syringe has a thread packed piston. In this case, the piston is screwed in so that the injection can be measured and controlled. This may
![Une seringue Pravaz, injections hypodermiques, démonté et placé dans le cas, vintage engraved illustration. La médecine habituelle dict Image Vectorielle Stock - Alamy Une seringue Pravaz, injections hypodermiques, démonté et placé dans le cas, vintage engraved illustration. La médecine habituelle dict Image Vectorielle Stock - Alamy](https://c8.alamy.com/compfr/ew9j32/une-seringue-pravaz-injections-hypodermiques-demonte-et-place-dans-le-cas-vintage-engraved-illustration-la-medecine-habituelle-dict-ew9j32.jpg)
Une seringue Pravaz, injections hypodermiques, démonté et placé dans le cas, vintage engraved illustration. La médecine habituelle dict Image Vectorielle Stock - Alamy
![A Pravaz type syringe, made of glass and silver. Hypodermic syringes... Photo d'actualité - Getty Images A Pravaz type syringe, made of glass and silver. Hypodermic syringes... Photo d'actualité - Getty Images](https://media.gettyimages.com/id/90729721/fr/photo/a-pravaz-type-syringe-made-of-glass-and-silver-hypodermic-syringes-are-used-for-injecting.jpg?s=612x612&w=gi&k=20&c=lJ7wl2DDShED4N291MfRAgOj2SwPXADKpHcNHfaUUOg=)
A Pravaz type syringe, made of glass and silver. Hypodermic syringes... Photo d'actualité - Getty Images
![collections : Collections d'objets des musées : Seringue hypodermique 20 cc dit de Pravaz [2004_048_1-00002] collections : Collections d'objets des musées : Seringue hypodermique 20 cc dit de Pravaz [2004_048_1-00002]](https://collections.alpesazurpatrimoine.fr/media/collectiveaccess/images/1/0/4/63540_ca_object_representations_media_10489_large.jpg)