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Table 1 Dead space in high and low dead space needle and syringe combinations

From: Options for reducing HIV transmission related to the dead space in needles and syringes

Syringe Needle Mean Standard deviation
Dead space Type/dead space   
Low Low 3.0 2.0
High Low 13.0 1.8
Low High 45.0 4.2
High High 98.9 21.0