In a preceding issue we discussed briefly and in an elementary manner the use of various tests for albumin in the urine as they concern the general practitioner; a similar summary critic of the qualitative reactions for sugar will, it is believed, be welcomed by some of our readers.
Certain precautions should always be taken before examining the urine of a patient for sugar. The physician should, for example, know what drugs, if any, have recently been administered, since rhubarb, cascara sagrada, salicylic acid preparations, morphin, various coal-tar products and other medicaments may give rise to substances in the urine which lead to confusion in the application of the various sugar tests. Again, if albumin or sulphuretted hydrogen be present in the urine they must be removed before testing for sugar. Finally, fresh urine, rather than that kept from decomposition by preservatives, should be employed, for formalin and chloroform, sometimes