Cannula rectal

During the storage of theophylline rectal solution (Table 11.14) in disposable syringes with a rectal cannula, water evaporates. After 12 months of storage at room temperature, the evaporation rises to 5 %, after 24 months storage to 10 %. This causes an increase in... 

Containers for liquid rectal preparations range in volume from several millilitres to approximately 100 mL. The container must be equipped with a rectal cannula to administer the enema. Enemas can be packaged in enema bags (see Sect. 24.4.13.2). These have a longer cannula with which the enema can be administered deeper into the rectum. Another possibility is to package an enema in a syringe on which a rectal cannula is placed (see Sect. 24.4.16). 

For rectal administration of enemas the syringe is equipped with a rectal cannula. In this way a single strength solution can be administered in varying volumes. 

Administration of liquid rectal preparations requires a squeezable bottle (see Sect. 24.4.4.1), a bag (Sect. 24.4.13.2) or a syringe (see Sect. 24.4.16), with a rectal cannula (see Fig. 24.10). This cannula is preferably of flexible material to prevent damage to the rectal mucosa. This is less important with short cannulas than with long ones. An enema bag has a long flexible tube cannula. This cannula should be lubricated or should be made of slippery material to ease insertion. The cannula should have a rubber one-way check valve when respiration is possible (with enema bottles, not with enema bags). 

Cream + + Possibly rectal cannula, vaginal applicator... 

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