Micro-enema bottle

When administering an enema, it is almost impossible to transfer all liquid to the rectum. A small amount will always remain in the bottle or giving tube. Small enema bottles are therefore filled with an excess of liquid. The required excess depends on the model of the micro-enema bottle and on the physical properties of the micro-enema liquid, in particular the viscosity. The residual volume, and thus the required excess, can be determined by weighing a bottle, filling it and emptying it by squeezing, after which it is reweighed. 

When emptying the micro enema bottle some liquid remains in the bottle. Independent of the fill volume this loss is approximately 1.5 mL of aqueous solutions. When filling the bottle an excess volume is therefore required. When using a more viscous solution the loss in the single dose enema bottle will be greater. 

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