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Histidine-tryptophan-ketoglutarate (Custodiol® HTK) solution is a high-flow, low-potassium preservation solution used for organ transplantation. HTK solution is intended for perfusion and flushing of donor liver kidney, heart, lung and pancreas prior to removal from the donor and for preserving these organs during hypothermic storage and transport to the recipient. HTK solution is based on the principle of inactivating organ function by withdrawal of extracellular sodium and calcium, together with intensive buffering of the extracellular space by means of histidine/histidine hydrochloride, so as to prolong the period during which the organs will tolerate interruption of oxygenated blood. The composition of HTK is similar to that of extracellular fluid. All of the components of HTK occur naturally in the body.1

Component HTK
Sodium (mmol/L) 15
Potassium (mmol/L) 10
Magnesium (mmol/L) 4
Calcium (mmol/L) 0.015
Ketoglutarate/glutamic acid (mmol/L) 1
Histidine (mmol/L) 198
Mannitol (mmol/L) 30
Tryptophan (mmol/L) 2
Osmolarity (mOsm/L) 310

Custodiol® HTK is the registered trademark of Dr. Franz Köhler (Chemie GmbH, Germany).


1. 510(k) Summary. Custodiol® HTK Solution Common/Classification Name: Isolated Kidney Perfusion and Transport System and Accessories, 21 CFR 876.5880; Franz Kohler. Prepared December 14, 2004. http://www.fda.gov/cdrh/pdf4/K043461.pdf

2. Ringe B.,et al. Safety and efficacy of living donor liver preservation with HTK solution. Transplant Proc. 2005;37:316–319.

3. Agarawal A., et al. Follow-up experience using histidine-tryptophan-ketoglutarate solution in clinical pancreas transplantation Transplant Proc. 2005;37:3523–3526.

4. Pokorny H., et al.: Histidine-tryptophan-ketoglutarate solution for organ preservation in human liver transplantation — a prospective multi-centre observation study. Transpl Int. 2004;17:256-60.

5. de Boer J., et al.: Eurotransplant randomized multicenter kidney graft preservation study comparing HTK with UW and Euro-Collins. Transpl lnt. 1999;12:447-453.

6. Hesse U.J., et al.: Organ preservation with HTK and UW solution. Pabst Sci. Publishers, D-49525 Lengerich, 1999.

7. Hatano E., et al: Hepatic preservation with histidine-tryptophan-ketoglutarate solution in living related and cadaveric liver transplantation. Clin Sci. 1997;93:81-88.

External links

Dr. Franz Köhler Chemie GmbH