Air bubble barrier to syringe contamination

Syringe contamination following intramuscular and subcutaneous injections.

FOR many years it had been customary to give a series of intravenous injections of a drug such as neoarsphenamine with the same syringe, merely rinsing the syringe with antiseptic and distilled water before passing on to the next patient. Largely as a result of investigation of cases of postarsphenamine jaundice it has become recognized in recent years that a syringe which has been used for an ...

Efficacy of air/water syringe tip sterilization.

BACKGROUND Dental procedures involve contact between instruments and the patient's tissues, blood or saliva. This study evaluated the efficacy of the standardized sterilization of non-disposable air/water syringe tips and corrosion and contaminant build-up in these tips. METHODS The bacterial contamination of single-use and multiple-use non-disposable air/water syringe tips after routine use ...

A transient-flow syringe air permeameter

In response to the need to better describe spatial variations in permeability, we designed and built a new portable field air permeameter for use on rocks in outcrop and core. In this instrument, a chamber containing a small volume of air in contact with the rock is suddenly increased in volume creating a vacuum, causing air to flow from the rock into the chamber. The instantaneous chamber volu...

Air bubble growth in water.

Heat transfer enhancement due to air bubble injection into a horizontal double pipe heat exchanger

If an air flow is injected into a liquid fluid, many ambulant air bubbles are formed inside the fluid. Air bubbles move inside the liquid fluid because of the buoyancy force, and the mobility of these air bubbles makes sizable commixture and turbulence inside the fluid. This mechanism was employed to enhance the heat transfer rate of a horizontal double pipe heat exchanger in this paper. Howeve...