MEDICINAL TREATMENT 205 
tains many pus cells or bacteria, the local treatment: 
becomes essential. It consists in irrigating the bladder 
with weak antiseptic solutions such as_potass. - per- 
manganate 1 per cent., boric acid 2 per cent., or zinc 
sulphate 1 per cent., by passing a sterile catheter into 
that organ, attached to which is a small rubber pipe and: 
Fic. 26.—IRRIGATING THE BLADDER. 
The procedure is the same as for rectal lavage. 
funnel (see Fig. 26), the latter being filled with the warm 
solution, which then gravitates slowly into the bladder; 
by lowering and inverting the funnel the liquid-runs 
out again exactly in the same way as it does in the per- 
formance of rectal lavage. - 
If preferred a syringe may be attached to the catheter, 
