Authors have used subjective global assessment method for evaluation of nutritional status. T hey measured muscle strength with relaxometry device. They found next correlation coefficients: twitch strength TW% 30 mA (-0,68), loss of body weig ht (0,57), length of ICU stay (0,53), plasma butyrylcholinestherase (-0,52), days used antibiotics (0,51), occurrence of pneumonia (0,50), days of postoperative hospitalisation (0,46), days with skin stitches (0,45), plasma albumin (-0,38), plasma proteins (-0,34), age (0,26).

        Key words: artificial nutrition - muscle strenght - relaxometry