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•Guarded eye speculum (left and right)-do-; heavy instrument but can keep eyelashes out of the operating field with its "guard" and hence left or right ones are required •Wire Speculum: to keep the eyes open during any operation; light wire instrument Needle holders: holding the needle in position while applying sutures •Silcock's needle ...
The hypodermic needle reduces contamination for two reasons: First, its surface is extremely smooth, which prevents airborne pathogens from becoming trapped between irregularities on the needle's surface, which would subsequently be transferred into the media (e.g. agar) as contaminants; second, the needle's surface is extremely sharp, which ...
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The open end of the syringe may be fitted with a hypodermic needle, a nozzle or tubing to direct the flow into and out of the barrel. Syringes are frequently used in clinical medicine to administer injections , infuse intravenous therapy into the bloodstream, apply compounds such as glue or lubricant , and draw/measure liquids.
A precursor to the flip-top, the "bail" or "Kilner" closure was invented in 1859, where a lid with gasket was held by a wire harness and sealed by a separate set of wires. Examples of flip-top bottles. The first flip-top closure was created by Charles de Quillfeldt in the United States, who filed for a patent on 30 November 1874.
Needlestick injuries may also occur when needles are exchanged between personnel, loaded into a needle driver, or when sutures are tied off while still connected to the needle. Needlestick injuries are more common during night shifts [ 14 ] and for less experienced people; fatigue, high workload, shift work, high pressure, or high perception of ...
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