The authors deal with the dose measurement at the skin of workers Hp(0.07) and the dose Hp(10) at work with solutions of 90Y of high activity and deal with suitable protective measures based on the data from literature and regulations valid in the Czech Republic. An effective shield of the vials and injection syringes from beta radiation is secured by shield covers from polymethylmethacrylate (PMMA) of the minimal thickness of 6 mm, or by a layer combined from PMMA and lead. The data of common commercial thermoluminiscent (TL) finger dosimeter, carried routinely at the lower phalanx of the finger in direction from the source significantly understimates the dose on the hand skin as compared with the data of thin TL dosimeter located at the finger tip. The dose on the skin caused by contamination with the solution of 90Y may be significant – considering the same planar activity being higher than in the 89Sr and 32P radionuclides. The dose rate of bremsstrahlung released from the patient’s body, who was administered 90Y is very low, but the patient dismissed from the hospital must – in view of the elimination of a certain part of the applied irradiation into urine – be given written instructions about his/her behavior at home, especially from the standpoint of personal hygiene. This measure is aimed at a maximum decrease in internal contamination of relatives and other persons, who the patient may encounter.

        Key words: yttrium-90 – therapy – nuclear medicine – dose of beta irradiation – bremsstrahlung – radiation workers – radiation protection – surface contamination