potassium stimulation test

Tests bladder for sensitivity to K⁺ Indications: - workup for interstitial cystitis Procedure: 1) drain bladder & insert small urethral catheter 2) instill 40 mL H₂O into bladder over 2-3 minutes 3) rank urgency (0-5), pain (0-5) 4) drain bladder 5) instill 40 mL 0.4 M KCl - if immediate pain, wash bladder with 60 mL H₂O, instill anesthetic*, test is positive 6) if no reaction, allow remain for 5 minutes 7) rank urgency (0-5), pain (0-5) 8) void bladder 9) if positive test, wash bladder with 60 mL H₂O, instill anesthetic*, test is positive * anesthetic: 1:1 solution of bupivacaine 0.5% % lidocaine jelly 2%

References

Rosenberg MT, Moldwin RM, Stanfod EJ, Early diagnosis and mangaement of interstitial cystitis, Women's Health in Primary Care 7:456, 2004