Hyperconcentration

Hypoconcentration is relatively rare; hyperconcentration is fairly frequent in disease, especially in cases of cardiorenal insufficiency.

Source: wiktionary

The hyperconcentration of the blood, the increase in the number of red corpuscles, indicate the diminution of humor.

Source: wiktionary

A further study along that line was particularly instructive, for we found we could take a tooth structure, dry it in the presence of sulphuric acid for a certain number of days, so it came to a fixed point of water content, and then by putting it in a solution that was of hyperconcentration or hypoconcentration in certain ions, we could change the weight. It has always seemed probable to me that part of this problem has to do with certain solvent factors in the saliva.

Source: wiktionary

It is claimed that renal calculi, while they may be secondary to pyronephrosis, are never secondary to hydronephrosis, since the hydronephrotic kidney has permanently lost its power of hyperconcentration.

Source: wiktionary