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Introduction: Preparation of a patient for an examination and taking samples of biological material belong to critical factors of the laboratory preanalytical phase's quality. Taking of venous blood is one of the most common nursing care interventions. Methods: A questionnaire survey using a content validated questionnaire from the laboratory of clinical biochemistry of University hospital in Umeå in Sweden has been carried out. Data analysis was performed using the Statistics 12 program at a significance level of 0.05. Aim: The main aim was to evaluate a selected group of general nurses' awareness about the correct procedures for collecting venous blood in two accredited inpatient health care providers. Results: One-hundred-and-fifty-three general nurses from two health care facilities took part in the study (hospital A: n = 71, hospital B: n = 82). The answers of the general nurses from both monitored facilities were almost identical, but not always correct. There was a statistically insignificant difference (p < 0.05) in the knowledge of general nurses in the procedure of venous blood collection. Still, there was a statistically significant difference in the declared labeling of tubes before collecting or in the collection of several different tubes at once (p < 0.05). Conclusions: The identified inconsistencies in the procedures during blood taking conform to previous foreign studies. The need for close collaboration with clinical laboratory personnel and the requirement of control in the preanalytical phase concerning taking samples of biological material is essential to ensure better quality care.

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Summary. This paper is focused on the awareness of public regarding prevention of colorectal carcinoma and education in this field. If we look at the lives of our ancestors, we can see that our lives are far more comfortable. Technologies that surround us in every step we take make our lives easier but our pace is faster and faster and that takes toll on our lifestyle – we have less exercise outdoors, bad eating habits, we smoke, drink alcohol, we use drugs and we do not sleep enough. All these factors create stress and strain. Unhealthy lifestyle has lead to overall deterioration of people’s health, cardiovascular diseases, mental disorders or increase of tumor diseases. In the Czech Republic, colorectal carcinoma holds the second position in the incidence of tumor diseases and Czech men have the highest incidence of colorectal carcinoma in the world. That is why it is so important to make prevention a part of our lives to try to avoid this serious disease.